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boringssl/include/openssl/ssl.h
David Benjamin 04017c17db Overhaul session resumption documentation. 
This has come up a few times and our docs aren't great. This hopefully
describes the sharp edges better.

Change-Id: I5d4044449f74ec116838fd1bba629cd90dc0d1ac
Reviewed-on: https://boringssl-review.googlesource.com/17504
Reviewed-by: Adam Langley <agl@google.com>
2017-07-05 21:40:20 +00:00

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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
/* ====================================================================
* Copyright 2005 Nokia. All rights reserved.
*
* The portions of the attached software ("Contribution") is developed by
* Nokia Corporation and is licensed pursuant to the OpenSSL open source
* license.
*
* The Contribution, originally written by Mika Kousa and Pasi Eronen of
* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
* support (see RFC 4279) to OpenSSL.
*
* No patent licenses or other rights except those expressly stated in
* the OpenSSL open source license shall be deemed granted or received
* expressly, by implication, estoppel, or otherwise.
*
* No assurances are provided by Nokia that the Contribution does not
* infringe the patent or other intellectual property rights of any third
* party or that the license provides you with all the necessary rights
* to make use of the Contribution.
*
* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
* OTHERWISE.
*/
#ifndef OPENSSL_HEADER_SSL_H
#define OPENSSL_HEADER_SSL_H
#include <openssl/base.h>
#include <openssl/bio.h>
#include <openssl/buf.h>
#include <openssl/hmac.h>
#include <openssl/lhash.h>
#include <openssl/pem.h>
#include <openssl/ssl3.h>
#include <openssl/thread.h>
#include <openssl/tls1.h>
#include <openssl/x509.h>
#if !defined(OPENSSL_WINDOWS)
#include <sys/time.h>
#endif
/* Forward-declare struct timeval. On Windows, it is defined in winsock2.h and
* Windows headers define too many macros to be included in public headers.
* However, only a forward declaration is needed. */
struct timeval;
#if defined(__cplusplus)
extern "C" {
#endif
/* SSL implementation. */
/* SSL contexts.
*
* |SSL_CTX| objects manage shared state and configuration between multiple TLS
* or DTLS connections. Whether the connections are TLS or DTLS is selected by
* an |SSL_METHOD| on creation.
*
* |SSL_CTX| are reference-counted and may be shared by connections across
* multiple threads. Once shared, functions which change the |SSL_CTX|'s
* configuration may not be used. */
/* TLS_method is the |SSL_METHOD| used for TLS (and SSLv3) connections. */
OPENSSL_EXPORT const SSL_METHOD *TLS_method(void);
/* DTLS_method is the |SSL_METHOD| used for DTLS connections. */
OPENSSL_EXPORT const SSL_METHOD *DTLS_method(void);
/* TLS_with_buffers_method is like |TLS_method|, but avoids all use of
* crypto/x509. */
OPENSSL_EXPORT const SSL_METHOD *TLS_with_buffers_method(void);
/* SSL_CTX_new returns a newly-allocated |SSL_CTX| with default settings or NULL
* on error. */
OPENSSL_EXPORT SSL_CTX *SSL_CTX_new(const SSL_METHOD *method);
/* SSL_CTX_up_ref increments the reference count of |ctx|. It returns one. */
OPENSSL_EXPORT int SSL_CTX_up_ref(SSL_CTX *ctx);
/* SSL_CTX_free releases memory associated with |ctx|. */
OPENSSL_EXPORT void SSL_CTX_free(SSL_CTX *ctx);
/* SSL connections.
*
* An |SSL| object represents a single TLS or DTLS connection. Although the
* shared |SSL_CTX| is thread-safe, an |SSL| is not thread-safe and may only be
* used on one thread at a time. */
/* SSL_new returns a newly-allocated |SSL| using |ctx| or NULL on error. The new
* connection inherits settings from |ctx| at the time of creation. Settings may
* also be individually configured on the connection.
*
* On creation, an |SSL| is not configured to be either a client or server. Call
* |SSL_set_connect_state| or |SSL_set_accept_state| to set this. */
OPENSSL_EXPORT SSL *SSL_new(SSL_CTX *ctx);
/* SSL_free releases memory associated with |ssl|. */
OPENSSL_EXPORT void SSL_free(SSL *ssl);
/* SSL_get_SSL_CTX returns the |SSL_CTX| associated with |ssl|. If
* |SSL_set_SSL_CTX| is called, it returns the new |SSL_CTX|, not the initial
* one. */
OPENSSL_EXPORT SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl);
/* SSL_set_connect_state configures |ssl| to be a client. */
OPENSSL_EXPORT void SSL_set_connect_state(SSL *ssl);
/* SSL_set_accept_state configures |ssl| to be a server. */
OPENSSL_EXPORT void SSL_set_accept_state(SSL *ssl);
/* SSL_is_server returns one if |ssl| is configured as a server and zero
* otherwise. */
OPENSSL_EXPORT int SSL_is_server(const SSL *ssl);
/* SSL_is_dtls returns one if |ssl| is a DTLS connection and zero otherwise. */
OPENSSL_EXPORT int SSL_is_dtls(const SSL *ssl);
/* SSL_set_bio configures |ssl| to read from |rbio| and write to |wbio|. |ssl|
* takes ownership of the two |BIO|s. If |rbio| and |wbio| are the same, |ssl|
* only takes ownership of one reference.
*
* In DTLS, |rbio| must be non-blocking to properly handle timeouts and
* retransmits.
*
* If |rbio| is the same as the currently configured |BIO| for reading, that
* side is left untouched and is not freed.
*
* If |wbio| is the same as the currently configured |BIO| for writing AND |ssl|
* is not currently configured to read from and write to the same |BIO|, that
* side is left untouched and is not freed. This asymmetry is present for
* historical reasons.
*
* Due to the very complex historical behavior of this function, calling this
* function if |ssl| already has |BIO|s configured is deprecated. Prefer
* |SSL_set0_rbio| and |SSL_set0_wbio| instead. */
OPENSSL_EXPORT void SSL_set_bio(SSL *ssl, BIO *rbio, BIO *wbio);
/* SSL_set0_rbio configures |ssl| to write to |rbio|. It takes ownership of
* |rbio|.
*
* Note that, although this function and |SSL_set0_wbio| may be called on the
* same |BIO|, each call takes a reference. Use |BIO_up_ref| to balance this. */
OPENSSL_EXPORT void SSL_set0_rbio(SSL *ssl, BIO *rbio);
/* SSL_set0_wbio configures |ssl| to write to |wbio|. It takes ownership of
* |wbio|.
*
* Note that, although this function and |SSL_set0_rbio| may be called on the
* same |BIO|, each call takes a reference. Use |BIO_up_ref| to balance this. */
OPENSSL_EXPORT void SSL_set0_wbio(SSL *ssl, BIO *wbio);
/* SSL_get_rbio returns the |BIO| that |ssl| reads from. */
OPENSSL_EXPORT BIO *SSL_get_rbio(const SSL *ssl);
/* SSL_get_wbio returns the |BIO| that |ssl| writes to. */
OPENSSL_EXPORT BIO *SSL_get_wbio(const SSL *ssl);
/* SSL_get_fd calls |SSL_get_rfd|. */
OPENSSL_EXPORT int SSL_get_fd(const SSL *ssl);
/* SSL_get_rfd returns the file descriptor that |ssl| is configured to read
* from. If |ssl|'s read |BIO| is not configured or doesn't wrap a file
* descriptor then it returns -1.
*
* Note: On Windows, this may return either a file descriptor or a socket (cast
* to int), depending on whether |ssl| was configured with a file descriptor or
* socket |BIO|. */
OPENSSL_EXPORT int SSL_get_rfd(const SSL *ssl);
/* SSL_get_wfd returns the file descriptor that |ssl| is configured to write
* to. If |ssl|'s write |BIO| is not configured or doesn't wrap a file
* descriptor then it returns -1.
*
* Note: On Windows, this may return either a file descriptor or a socket (cast
* to int), depending on whether |ssl| was configured with a file descriptor or
* socket |BIO|. */
OPENSSL_EXPORT int SSL_get_wfd(const SSL *ssl);
/* SSL_set_fd configures |ssl| to read from and write to |fd|. It returns one
* on success and zero on allocation error. The caller retains ownership of
* |fd|.
*
* On Windows, |fd| is cast to a |SOCKET| and used with Winsock APIs. */
OPENSSL_EXPORT int SSL_set_fd(SSL *ssl, int fd);
/* SSL_set_rfd configures |ssl| to read from |fd|. It returns one on success and
* zero on allocation error. The caller retains ownership of |fd|.
*
* On Windows, |fd| is cast to a |SOCKET| and used with Winsock APIs. */
OPENSSL_EXPORT int SSL_set_rfd(SSL *ssl, int fd);
/* SSL_set_wfd configures |ssl| to write to |fd|. It returns one on success and
* zero on allocation error. The caller retains ownership of |fd|.
*
* On Windows, |fd| is cast to a |SOCKET| and used with Winsock APIs. */
OPENSSL_EXPORT int SSL_set_wfd(SSL *ssl, int fd);
/* SSL_do_handshake continues the current handshake. If there is none or the
* handshake has completed or False Started, it returns one. Otherwise, it
* returns <= 0. The caller should pass the value into |SSL_get_error| to
* determine how to proceed.
*
* In DTLS, the caller must drive retransmissions. Whenever |SSL_get_error|
* signals |SSL_ERROR_WANT_READ|, use |DTLSv1_get_timeout| to determine the
* current timeout. If it expires before the next retry, call
* |DTLSv1_handle_timeout|. Note that DTLS handshake retransmissions use fresh
* sequence numbers, so it is not sufficient to replay packets at the transport.
*
* TODO(davidben): Ensure 0 is only returned on transport EOF.
* https://crbug.com/466303. */
OPENSSL_EXPORT int SSL_do_handshake(SSL *ssl);
/* SSL_connect configures |ssl| as a client, if unconfigured, and calls
* |SSL_do_handshake|. */
OPENSSL_EXPORT int SSL_connect(SSL *ssl);
/* SSL_accept configures |ssl| as a server, if unconfigured, and calls
* |SSL_do_handshake|. */
OPENSSL_EXPORT int SSL_accept(SSL *ssl);
/* SSL_read reads up to |num| bytes from |ssl| into |buf|. It implicitly runs
* any pending handshakes, including renegotiations when enabled. On success, it
* returns the number of bytes read. Otherwise, it returns <= 0. The caller
* should pass the value into |SSL_get_error| to determine how to proceed.
*
* TODO(davidben): Ensure 0 is only returned on transport EOF.
* https://crbug.com/466303. */
OPENSSL_EXPORT int SSL_read(SSL *ssl, void *buf, int num);
/* SSL_peek behaves like |SSL_read| but does not consume any bytes returned. */
OPENSSL_EXPORT int SSL_peek(SSL *ssl, void *buf, int num);
/* SSL_pending returns the number of bytes available in |ssl|. It does not read
* from the transport. */
OPENSSL_EXPORT int SSL_pending(const SSL *ssl);
/* SSL_write writes up to |num| bytes from |buf| into |ssl|. It implicitly runs
* any pending handshakes, including renegotiations when enabled. On success, it
* returns the number of bytes written. Otherwise, it returns <= 0. The caller
* should pass the value into |SSL_get_error| to determine how to proceed.
*
* In TLS, a non-blocking |SSL_write| differs from non-blocking |write| in that
* a failed |SSL_write| still commits to the data passed in. When retrying, the
* caller must supply the original write buffer (or a larger one containing the
* original as a prefix). By default, retries will fail if they also do not
* reuse the same |buf| pointer. This may be relaxed with
* |SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER|, but the buffer contents still must be
* unchanged.
*
* By default, in TLS, |SSL_write| will not return success until all |num| bytes
* are written. This may be relaxed with |SSL_MODE_ENABLE_PARTIAL_WRITE|. It
* allows |SSL_write| to complete with a partial result when only part of the
* input was written in a single record.
*
* In DTLS, neither |SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER| and
* |SSL_MODE_ENABLE_PARTIAL_WRITE| do anything. The caller may retry with a
* different buffer freely. A single call to |SSL_write| only ever writes a
* single record in a single packet, so |num| must be at most
* |SSL3_RT_MAX_PLAIN_LENGTH|.
*
* TODO(davidben): Ensure 0 is only returned on transport EOF.
* https://crbug.com/466303. */
OPENSSL_EXPORT int SSL_write(SSL *ssl, const void *buf, int num);
/* SSL_shutdown shuts down |ssl|. On success, it completes in two stages. First,
* it returns 0 if |ssl| completed uni-directional shutdown; close_notify has
* been sent, but the peer's close_notify has not been received. Most callers
* may stop at this point. For bi-directional shutdown, call |SSL_shutdown|
* again. It returns 1 if close_notify has been both sent and received.
*
* If the peer's close_notify arrived first, the first stage is skipped.
* |SSL_shutdown| will return 1 once close_notify is sent and skip 0. Callers
* only interested in uni-directional shutdown must therefore allow for the
* first stage returning either 0 or 1.
*
* |SSL_shutdown| returns -1 on failure. The caller should pass the return value
* into |SSL_get_error| to determine how to proceed. If the underlying |BIO| is
* non-blocking, both stages may require retry. */
OPENSSL_EXPORT int SSL_shutdown(SSL *ssl);
/* SSL_CTX_set_quiet_shutdown sets quiet shutdown on |ctx| to |mode|. If
* enabled, |SSL_shutdown| will not send a close_notify alert or wait for one
* from the peer. It will instead synchronously return one. */
OPENSSL_EXPORT void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
/* SSL_CTX_get_quiet_shutdown returns whether quiet shutdown is enabled for
* |ctx|. */
OPENSSL_EXPORT int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);
/* SSL_set_quiet_shutdown sets quiet shutdown on |ssl| to |mode|. If enabled,
* |SSL_shutdown| will not send a close_notify alert or wait for one from the
* peer. It will instead synchronously return one. */
OPENSSL_EXPORT void SSL_set_quiet_shutdown(SSL *ssl, int mode);
/* SSL_get_quiet_shutdown returns whether quiet shutdown is enabled for
* |ssl|. */
OPENSSL_EXPORT int SSL_get_quiet_shutdown(const SSL *ssl);
/* SSL_get_error returns a |SSL_ERROR_*| value for the most recent operation on
* |ssl|. It should be called after an operation failed to determine whether the
* error was fatal and, if not, when to retry. */
OPENSSL_EXPORT int SSL_get_error(const SSL *ssl, int ret_code);
/* SSL_ERROR_NONE indicates the operation succeeded. */
#define SSL_ERROR_NONE 0
/* SSL_ERROR_SSL indicates the operation failed within the library. The caller
* may inspect the error queue for more information. */
#define SSL_ERROR_SSL 1
/* SSL_ERROR_WANT_READ indicates the operation failed attempting to read from
* the transport. The caller may retry the operation when the transport is ready
* for reading.
*
* If signaled by a DTLS handshake, the caller must also call
* |DTLSv1_get_timeout| and |DTLSv1_handle_timeout| as appropriate. See
* |SSL_do_handshake|. */
#define SSL_ERROR_WANT_READ 2
/* SSL_ERROR_WANT_WRITE indicates the operation failed attempting to write to
* the transport. The caller may retry the operation when the transport is ready
* for writing. */
#define SSL_ERROR_WANT_WRITE 3
/* SSL_ERROR_WANT_X509_LOOKUP indicates the operation failed in calling the
* |cert_cb| or |client_cert_cb|. The caller may retry the operation when the
* callback is ready to return a certificate or one has been configured
* externally.
*
* See also |SSL_CTX_set_cert_cb| and |SSL_CTX_set_client_cert_cb|. */
#define SSL_ERROR_WANT_X509_LOOKUP 4
/* SSL_ERROR_SYSCALL indicates the operation failed externally to the library.
* The caller should consult the system-specific error mechanism. This is
* typically |errno| but may be something custom if using a custom |BIO|. It
* may also be signaled if the transport returned EOF, in which case the
* operation's return value will be zero. */
#define SSL_ERROR_SYSCALL 5
/* SSL_ERROR_ZERO_RETURN indicates the operation failed because the connection
* was cleanly shut down with a close_notify alert. */
#define SSL_ERROR_ZERO_RETURN 6
/* SSL_ERROR_WANT_CONNECT indicates the operation failed attempting to connect
* the transport (the |BIO| signaled |BIO_RR_CONNECT|). The caller may retry the
* operation when the transport is ready. */
#define SSL_ERROR_WANT_CONNECT 7
/* SSL_ERROR_WANT_ACCEPT indicates the operation failed attempting to accept a
* connection from the transport (the |BIO| signaled |BIO_RR_ACCEPT|). The
* caller may retry the operation when the transport is ready.
*
* TODO(davidben): Remove this. It's used by accept BIOs which are bizarre. */
#define SSL_ERROR_WANT_ACCEPT 8
/* SSL_ERROR_WANT_CHANNEL_ID_LOOKUP indicates the operation failed looking up
* the Channel ID key. The caller may retry the operation when |channel_id_cb|
* is ready to return a key or one has been configured with
* |SSL_set1_tls_channel_id|.
*
* See also |SSL_CTX_set_channel_id_cb|. */
#define SSL_ERROR_WANT_CHANNEL_ID_LOOKUP 9
/* SSL_ERROR_PENDING_SESSION indicates the operation failed because the session
* lookup callback indicated the session was unavailable. The caller may retry
* the operation when lookup has completed.
*
* See also |SSL_CTX_sess_set_get_cb| and |SSL_magic_pending_session_ptr|. */
#define SSL_ERROR_PENDING_SESSION 11
/* SSL_ERROR_PENDING_CERTIFICATE indicates the operation failed because the
* early callback indicated certificate lookup was incomplete. The caller may
* retry the operation when lookup has completed. Note: when the operation is
* retried, the early callback will not be called a second time.
*
* See also |SSL_CTX_set_select_certificate_cb|. */
#define SSL_ERROR_PENDING_CERTIFICATE 12
/* SSL_ERROR_WANT_PRIVATE_KEY_OPERATION indicates the operation failed because
* a private key operation was unfinished. The caller may retry the operation
* when the private key operation is complete.
*
* See also |SSL_set_private_key_method| and
* |SSL_CTX_set_private_key_method|. */
#define SSL_ERROR_WANT_PRIVATE_KEY_OPERATION 13
/* SSL_ERROR_PENDING_TICKET indicates that a ticket decryption is pending. The
* caller may retry the operation when the decryption is ready.
*
* See also |SSL_CTX_set_ticket_aead_method|. */
#define SSL_ERROR_PENDING_TICKET 14
/* SSL_ERROR_EARLY_DATA_REJECTED indicates that early data was rejected. The
* caller should treat this as a connection failure and retry any operations
* associated with the rejected early data. |SSL_reset_early_data_reject| may be
* used to reuse the underlying connection for the retry. */
#define SSL_ERROR_EARLY_DATA_REJECTED 15
/* SSL_set_mtu sets the |ssl|'s MTU in DTLS to |mtu|. It returns one on success
* and zero on failure. */
OPENSSL_EXPORT int SSL_set_mtu(SSL *ssl, unsigned mtu);
/* DTLSv1_set_initial_timeout_duration sets the initial duration for a DTLS
* handshake timeout.
*
* This duration overrides the default of 1 second, which is the strong
* recommendation of RFC 6347 (see section 4.2.4.1). However, there may exist
* situations where a shorter timeout would be beneficial, such as for
* time-sensitive applications. */
OPENSSL_EXPORT void DTLSv1_set_initial_timeout_duration(SSL *ssl,
unsigned duration_ms);
/* DTLSv1_get_timeout queries the next DTLS handshake timeout. If there is a
* timeout in progress, it sets |*out| to the time remaining and returns one.
* Otherwise, it returns zero.
*
* When the timeout expires, call |DTLSv1_handle_timeout| to handle the
* retransmit behavior.
*
* NOTE: This function must be queried again whenever the handshake state
* machine changes, including when |DTLSv1_handle_timeout| is called. */
OPENSSL_EXPORT int DTLSv1_get_timeout(const SSL *ssl, struct timeval *out);
/* DTLSv1_handle_timeout is called when a DTLS handshake timeout expires. If no
* timeout had expired, it returns 0. Otherwise, it retransmits the previous
* flight of handshake messages and returns 1. If too many timeouts had expired
* without progress or an error occurs, it returns -1.
*
* The caller's external timer should be compatible with the one |ssl| queries
* within some fudge factor. Otherwise, the call will be a no-op, but
* |DTLSv1_get_timeout| will return an updated timeout.
*
* If the function returns -1, checking if |SSL_get_error| returns
* |SSL_ERROR_WANT_WRITE| may be used to determine if the retransmit failed due
* to a non-fatal error at the write |BIO|. However, the operation may not be
* retried until the next timeout fires.
*
* WARNING: This function breaks the usual return value convention.
*
* TODO(davidben): This |SSL_ERROR_WANT_WRITE| behavior is kind of bizarre. */
OPENSSL_EXPORT int DTLSv1_handle_timeout(SSL *ssl);
/* Protocol versions. */
#define DTLS1_VERSION_MAJOR 0xfe
#define SSL3_VERSION_MAJOR 0x03
#define SSL3_VERSION 0x0300
#define TLS1_VERSION 0x0301
#define TLS1_1_VERSION 0x0302
#define TLS1_2_VERSION 0x0303
#define TLS1_3_VERSION 0x0304
#define DTLS1_VERSION 0xfeff
#define DTLS1_2_VERSION 0xfefd
#define TLS1_3_DRAFT_VERSION 0x7f12
/* SSL_CTX_set_min_proto_version sets the minimum protocol version for |ctx| to
* |version|. If |version| is zero, the default minimum version is used. It
* returns one on success and zero if |version| is invalid. */
OPENSSL_EXPORT int SSL_CTX_set_min_proto_version(SSL_CTX *ctx,
uint16_t version);
/* SSL_CTX_set_max_proto_version sets the maximum protocol version for |ctx| to
* |version|. If |version| is zero, the default maximum version is used. It
* returns one on success and zero if |version| is invalid. */
OPENSSL_EXPORT int SSL_CTX_set_max_proto_version(SSL_CTX *ctx,
uint16_t version);
/* SSL_set_min_proto_version sets the minimum protocol version for |ssl| to
* |version|. If |version| is zero, the default minimum version is used. It
* returns one on success and zero if |version| is invalid. */
OPENSSL_EXPORT int SSL_set_min_proto_version(SSL *ssl, uint16_t version);
/* SSL_set_max_proto_version sets the maximum protocol version for |ssl| to
* |version|. If |version| is zero, the default maximum version is used. It
* returns one on success and zero if |version| is invalid. */
OPENSSL_EXPORT int SSL_set_max_proto_version(SSL *ssl, uint16_t version);
/* SSL_version returns the TLS or DTLS protocol version used by |ssl|, which is
* one of the |*_VERSION| values. (E.g. |TLS1_2_VERSION|.) Before the version
* is negotiated, the result is undefined. */
OPENSSL_EXPORT int SSL_version(const SSL *ssl);
/* Options.
*
* Options configure protocol behavior. */
/* SSL_OP_NO_QUERY_MTU, in DTLS, disables querying the MTU from the underlying
* |BIO|. Instead, the MTU is configured with |SSL_set_mtu|. */
#define SSL_OP_NO_QUERY_MTU 0x00001000L
/* SSL_OP_NO_TICKET disables session ticket support (RFC 5077). */
#define SSL_OP_NO_TICKET 0x00004000L
/* SSL_OP_CIPHER_SERVER_PREFERENCE configures servers to select ciphers and
* ECDHE curves according to the server's preferences instead of the
* client's. */
#define SSL_OP_CIPHER_SERVER_PREFERENCE 0x00400000L
/* The following flags toggle individual protocol versions. This is deprecated.
* Use |SSL_CTX_set_min_proto_version| and |SSL_CTX_set_max_proto_version|
* instead. */
#define SSL_OP_NO_SSLv3 0x02000000L
#define SSL_OP_NO_TLSv1 0x04000000L
#define SSL_OP_NO_TLSv1_2 0x08000000L
#define SSL_OP_NO_TLSv1_1 0x10000000L
#define SSL_OP_NO_TLSv1_3 0x20000000L
#define SSL_OP_NO_DTLSv1 SSL_OP_NO_TLSv1
#define SSL_OP_NO_DTLSv1_2 SSL_OP_NO_TLSv1_2
/* SSL_CTX_set_options enables all options set in |options| (which should be one
* or more of the |SSL_OP_*| values, ORed together) in |ctx|. It returns a
* bitmask representing the resulting enabled options. */
OPENSSL_EXPORT uint32_t SSL_CTX_set_options(SSL_CTX *ctx, uint32_t options);
/* SSL_CTX_clear_options disables all options set in |options| (which should be
* one or more of the |SSL_OP_*| values, ORed together) in |ctx|. It returns a
* bitmask representing the resulting enabled options. */
OPENSSL_EXPORT uint32_t SSL_CTX_clear_options(SSL_CTX *ctx, uint32_t options);
/* SSL_CTX_get_options returns a bitmask of |SSL_OP_*| values that represent all
* the options enabled for |ctx|. */
OPENSSL_EXPORT uint32_t SSL_CTX_get_options(const SSL_CTX *ctx);
/* SSL_set_options enables all options set in |options| (which should be one or
* more of the |SSL_OP_*| values, ORed together) in |ssl|. It returns a bitmask
* representing the resulting enabled options. */
OPENSSL_EXPORT uint32_t SSL_set_options(SSL *ssl, uint32_t options);
/* SSL_clear_options disables all options set in |options| (which should be one
* or more of the |SSL_OP_*| values, ORed together) in |ssl|. It returns a
* bitmask representing the resulting enabled options. */
OPENSSL_EXPORT uint32_t SSL_clear_options(SSL *ssl, uint32_t options);
/* SSL_get_options returns a bitmask of |SSL_OP_*| values that represent all the
* options enabled for |ssl|. */
OPENSSL_EXPORT uint32_t SSL_get_options(const SSL *ssl);
/* Modes.
*
* Modes configure API behavior. */
/* SSL_MODE_ENABLE_PARTIAL_WRITE, in TLS, allows |SSL_write| to complete with a
* partial result when the only part of the input was written in a single
* record. In DTLS, it does nothing. */
#define SSL_MODE_ENABLE_PARTIAL_WRITE 0x00000001L
/* SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER, in TLS, allows retrying an incomplete
* |SSL_write| with a different buffer. However, |SSL_write| still assumes the
* buffer contents are unchanged. This is not the default to avoid the
* misconception that non-blocking |SSL_write| behaves like non-blocking
* |write|. In DTLS, it does nothing. */
#define SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER 0x00000002L
/* SSL_MODE_NO_AUTO_CHAIN disables automatically building a certificate chain
* before sending certificates to the peer. This flag is set (and the feature
* disabled) by default.
* TODO(davidben): Remove this behavior. https://crbug.com/boringssl/42. */
#define SSL_MODE_NO_AUTO_CHAIN 0x00000008L
/* SSL_MODE_ENABLE_FALSE_START allows clients to send application data before
* receipt of ChangeCipherSpec and Finished. This mode enables full handshakes
* to 'complete' in one RTT. See RFC 7918.
*
* When False Start is enabled, |SSL_do_handshake| may succeed before the
* handshake has completely finished. |SSL_write| will function at this point,
* and |SSL_read| will transparently wait for the final handshake leg before
* returning application data. To determine if False Start occurred or when the
* handshake is completely finished, see |SSL_in_false_start|, |SSL_in_init|,
* and |SSL_CB_HANDSHAKE_DONE| from |SSL_CTX_set_info_callback|. */
#define SSL_MODE_ENABLE_FALSE_START 0x00000080L
/* SSL_MODE_CBC_RECORD_SPLITTING causes multi-byte CBC records in SSL 3.0 and
* TLS 1.0 to be split in two: the first record will contain a single byte and
* the second will contain the remainder. This effectively randomises the IV and
* prevents BEAST attacks. */
#define SSL_MODE_CBC_RECORD_SPLITTING 0x00000100L
/* SSL_MODE_NO_SESSION_CREATION will cause any attempts to create a session to
* fail with SSL_R_SESSION_MAY_NOT_BE_CREATED. This can be used to enforce that
* session resumption is used for a given SSL*. */
#define SSL_MODE_NO_SESSION_CREATION 0x00000200L
/* SSL_MODE_SEND_FALLBACK_SCSV sends TLS_FALLBACK_SCSV in the ClientHello.
* To be set only by applications that reconnect with a downgraded protocol
* version; see RFC 7507 for details.
*
* DO NOT ENABLE THIS if your application attempts a normal handshake. Only use
* this in explicit fallback retries, following the guidance in RFC 7507. */
#define SSL_MODE_SEND_FALLBACK_SCSV 0x00000400L
/* SSL_CTX_set_mode enables all modes set in |mode| (which should be one or more
* of the |SSL_MODE_*| values, ORed together) in |ctx|. It returns a bitmask
* representing the resulting enabled modes. */
OPENSSL_EXPORT uint32_t SSL_CTX_set_mode(SSL_CTX *ctx, uint32_t mode);
/* SSL_CTX_clear_mode disables all modes set in |mode| (which should be one or
* more of the |SSL_MODE_*| values, ORed together) in |ctx|. It returns a
* bitmask representing the resulting enabled modes. */
OPENSSL_EXPORT uint32_t SSL_CTX_clear_mode(SSL_CTX *ctx, uint32_t mode);
/* SSL_CTX_get_mode returns a bitmask of |SSL_MODE_*| values that represent all
* the modes enabled for |ssl|. */
OPENSSL_EXPORT uint32_t SSL_CTX_get_mode(const SSL_CTX *ctx);
/* SSL_set_mode enables all modes set in |mode| (which should be one or more of
* the |SSL_MODE_*| values, ORed together) in |ssl|. It returns a bitmask
* representing the resulting enabled modes. */
OPENSSL_EXPORT uint32_t SSL_set_mode(SSL *ssl, uint32_t mode);
/* SSL_clear_mode disables all modes set in |mode| (which should be one or more
* of the |SSL_MODE_*| values, ORed together) in |ssl|. It returns a bitmask
* representing the resulting enabled modes. */
OPENSSL_EXPORT uint32_t SSL_clear_mode(SSL *ssl, uint32_t mode);
/* SSL_get_mode returns a bitmask of |SSL_MODE_*| values that represent all the
* modes enabled for |ssl|. */
OPENSSL_EXPORT uint32_t SSL_get_mode(const SSL *ssl);
/* SSL_CTX_set0_buffer_pool sets a |CRYPTO_BUFFER_POOL| that will be used to
* store certificates. This can allow multiple connections to share
* certificates and thus save memory.
*
* The SSL_CTX does not take ownership of |pool| and the caller must ensure
* that |pool| outlives |ctx| and all objects linked to it, including |SSL|,
* |X509| and |SSL_SESSION| objects. Basically, don't ever free |pool|. */
OPENSSL_EXPORT void SSL_CTX_set0_buffer_pool(SSL_CTX *ctx,
CRYPTO_BUFFER_POOL *pool);
/* Configuring certificates and private keys.
*
* These functions configure the connection's leaf certificate, private key, and
* certificate chain. The certificate chain is ordered leaf to root (as sent on
* the wire) but does not include the leaf. Both client and server certificates
* use these functions.
*
* Certificates and keys may be configured before the handshake or dynamically
* in the early callback and certificate callback. */
/* SSL_CTX_use_certificate sets |ctx|'s leaf certificate to |x509|. It returns
* one on success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x509);
/* SSL_use_certificate sets |ssl|'s leaf certificate to |x509|. It returns one
* on success and zero on failure. */
OPENSSL_EXPORT int SSL_use_certificate(SSL *ssl, X509 *x509);
/* SSL_CTX_use_PrivateKey sets |ctx|'s private key to |pkey|. It returns one on
* success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
/* SSL_use_PrivateKey sets |ssl|'s private key to |pkey|. It returns one on
* success and zero on failure. */
OPENSSL_EXPORT int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);
/* SSL_CTX_set0_chain sets |ctx|'s certificate chain, excluding the leaf, to
* |chain|. On success, it returns one and takes ownership of |chain|.
* Otherwise, it returns zero. */
OPENSSL_EXPORT int SSL_CTX_set0_chain(SSL_CTX *ctx, STACK_OF(X509) *chain);
/* SSL_CTX_set1_chain sets |ctx|'s certificate chain, excluding the leaf, to
* |chain|. It returns one on success and zero on failure. The caller retains
* ownership of |chain| and may release it freely. */
OPENSSL_EXPORT int SSL_CTX_set1_chain(SSL_CTX *ctx, STACK_OF(X509) *chain);
/* SSL_set0_chain sets |ssl|'s certificate chain, excluding the leaf, to
* |chain|. On success, it returns one and takes ownership of |chain|.
* Otherwise, it returns zero. */
OPENSSL_EXPORT int SSL_set0_chain(SSL *ssl, STACK_OF(X509) *chain);
/* SSL_set1_chain sets |ssl|'s certificate chain, excluding the leaf, to
* |chain|. It returns one on success and zero on failure. The caller retains
* ownership of |chain| and may release it freely. */
OPENSSL_EXPORT int SSL_set1_chain(SSL *ssl, STACK_OF(X509) *chain);
/* SSL_CTX_add0_chain_cert appends |x509| to |ctx|'s certificate chain. On
* success, it returns one and takes ownership of |x509|. Otherwise, it returns
* zero. */
OPENSSL_EXPORT int SSL_CTX_add0_chain_cert(SSL_CTX *ctx, X509 *x509);
/* SSL_CTX_add1_chain_cert appends |x509| to |ctx|'s certificate chain. It
* returns one on success and zero on failure. The caller retains ownership of
* |x509| and may release it freely. */
OPENSSL_EXPORT int SSL_CTX_add1_chain_cert(SSL_CTX *ctx, X509 *x509);
/* SSL_add0_chain_cert appends |x509| to |ctx|'s certificate chain. On success,
* it returns one and takes ownership of |x509|. Otherwise, it returns zero. */
OPENSSL_EXPORT int SSL_add0_chain_cert(SSL *ssl, X509 *x509);
/* SSL_CTX_add_extra_chain_cert calls |SSL_CTX_add0_chain_cert|. */
OPENSSL_EXPORT int SSL_CTX_add_extra_chain_cert(SSL_CTX *ctx, X509 *x509);
/* SSL_add1_chain_cert appends |x509| to |ctx|'s certificate chain. It returns
* one on success and zero on failure. The caller retains ownership of |x509|
* and may release it freely. */
OPENSSL_EXPORT int SSL_add1_chain_cert(SSL *ssl, X509 *x509);
/* SSL_CTX_clear_chain_certs clears |ctx|'s certificate chain and returns
* one. */
OPENSSL_EXPORT int SSL_CTX_clear_chain_certs(SSL_CTX *ctx);
/* SSL_CTX_clear_extra_chain_certs calls |SSL_CTX_clear_chain_certs|. */
OPENSSL_EXPORT int SSL_CTX_clear_extra_chain_certs(SSL_CTX *ctx);
/* SSL_clear_chain_certs clears |ssl|'s certificate chain and returns one. */
OPENSSL_EXPORT int SSL_clear_chain_certs(SSL *ssl);
/* SSL_CTX_set_cert_cb sets a callback that is called to select a certificate.
* The callback returns one on success, zero on internal error, and a negative
* number on failure or to pause the handshake. If the handshake is paused,
* |SSL_get_error| will return |SSL_ERROR_WANT_X509_LOOKUP|.
*
* On the client, the callback may call |SSL_get0_certificate_types| and
* |SSL_get_client_CA_list| for information on the server's certificate
* request.
*
* On the server, the callback will be called on non-resumption handshakes,
* after extensions have been processed. */
OPENSSL_EXPORT void SSL_CTX_set_cert_cb(SSL_CTX *ctx,
int (*cb)(SSL *ssl, void *arg),
void *arg);
/* SSL_set_cert_cb sets a callback that is called to select a certificate. The
* callback returns one on success, zero on internal error, and a negative
* number on failure or to pause the handshake. If the handshake is paused,
* |SSL_get_error| will return |SSL_ERROR_WANT_X509_LOOKUP|.
*
* On the client, the callback may call |SSL_get0_certificate_types| and
* |SSL_get_client_CA_list| for information on the server's certificate
* request. */
OPENSSL_EXPORT void SSL_set_cert_cb(SSL *ssl, int (*cb)(SSL *ssl, void *arg),
void *arg);
/* SSL_get0_certificate_types, for a client, sets |*out_types| to an array
* containing the client certificate types requested by a server. It returns the
* length of the array.
*
* The behavior of this function is undefined except during the callbacks set by
* by |SSL_CTX_set_cert_cb| and |SSL_CTX_set_client_cert_cb| or when the
* handshake is paused because of them. */
OPENSSL_EXPORT size_t SSL_get0_certificate_types(SSL *ssl,
const uint8_t **out_types);
/* SSL_certs_clear resets the private key, leaf certificate, and certificate
* chain of |ssl|. */
OPENSSL_EXPORT void SSL_certs_clear(SSL *ssl);
/* SSL_CTX_check_private_key returns one if the certificate and private key
* configured in |ctx| are consistent and zero otherwise. */
OPENSSL_EXPORT int SSL_CTX_check_private_key(const SSL_CTX *ctx);
/* SSL_check_private_key returns one if the certificate and private key
* configured in |ssl| are consistent and zero otherwise. */
OPENSSL_EXPORT int SSL_check_private_key(const SSL *ssl);
/* SSL_CTX_get0_certificate returns |ctx|'s leaf certificate. */
OPENSSL_EXPORT X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx);
/* SSL_get_certificate returns |ssl|'s leaf certificate. */
OPENSSL_EXPORT X509 *SSL_get_certificate(const SSL *ssl);
/* SSL_CTX_get0_privatekey returns |ctx|'s private key. */
OPENSSL_EXPORT EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx);
/* SSL_get_privatekey returns |ssl|'s private key. */
OPENSSL_EXPORT EVP_PKEY *SSL_get_privatekey(const SSL *ssl);
/* SSL_CTX_get0_chain_certs sets |*out_chain| to |ctx|'s certificate chain and
* returns one. */
OPENSSL_EXPORT int SSL_CTX_get0_chain_certs(const SSL_CTX *ctx,
STACK_OF(X509) **out_chain);
/* SSL_CTX_get_extra_chain_certs calls |SSL_CTX_get0_chain_certs|. */
OPENSSL_EXPORT int SSL_CTX_get_extra_chain_certs(const SSL_CTX *ctx,
STACK_OF(X509) **out_chain);
/* SSL_get0_chain_certs sets |*out_chain| to |ssl|'s certificate chain and
* returns one. */
OPENSSL_EXPORT int SSL_get0_chain_certs(const SSL *ssl,
STACK_OF(X509) **out_chain);
/* SSL_CTX_set_signed_cert_timestamp_list sets the list of signed certificate
* timestamps that is sent to clients that request it. The |list| argument must
* contain one or more SCT structures serialised as a SignedCertificateTimestamp
* List (see https://tools.ietf.org/html/rfc6962#section-3.3) – i.e. each SCT
* is prefixed by a big-endian, uint16 length and the concatenation of one or
* more such prefixed SCTs are themselves also prefixed by a uint16 length. It
* returns one on success and zero on error. The caller retains ownership of
* |list|. */
OPENSSL_EXPORT int SSL_CTX_set_signed_cert_timestamp_list(SSL_CTX *ctx,
const uint8_t *list,
size_t list_len);
/* SSL_set_signed_cert_timestamp_list sets the list of signed certificate
* timestamps that is sent to clients that request is. The same format as the
* one used for |SSL_CTX_set_signed_cert_timestamp_list| applies. The caller
* retains ownership of |list|. */
OPENSSL_EXPORT int SSL_set_signed_cert_timestamp_list(SSL *ctx,
const uint8_t *list,
size_t list_len);
/* SSL_CTX_set_ocsp_response sets the OCSP response that is sent to clients
* which request it. It returns one on success and zero on error. The caller
* retains ownership of |response|. */
OPENSSL_EXPORT int SSL_CTX_set_ocsp_response(SSL_CTX *ctx,
const uint8_t *response,
size_t response_len);
/* SSL_set_ocsp_response sets the OCSP response that is sent to clients which
* request it. It returns one on success and zero on error. The caller retains
* ownership of |response|. */
OPENSSL_EXPORT int SSL_set_ocsp_response(SSL *ssl,
const uint8_t *response,
size_t response_len);
/* SSL_SIGN_* are signature algorithm values as defined in TLS 1.3. */
#define SSL_SIGN_RSA_PKCS1_SHA1 0x0201
#define SSL_SIGN_RSA_PKCS1_SHA256 0x0401
#define SSL_SIGN_RSA_PKCS1_SHA384 0x0501
#define SSL_SIGN_RSA_PKCS1_SHA512 0x0601
#define SSL_SIGN_ECDSA_SHA1 0x0203
#define SSL_SIGN_ECDSA_SECP256R1_SHA256 0x0403
#define SSL_SIGN_ECDSA_SECP384R1_SHA384 0x0503
#define SSL_SIGN_ECDSA_SECP521R1_SHA512 0x0603
#define SSL_SIGN_RSA_PSS_SHA256 0x0804
#define SSL_SIGN_RSA_PSS_SHA384 0x0805
#define SSL_SIGN_RSA_PSS_SHA512 0x0806
#define SSL_SIGN_ED25519 0x0807
/* SSL_SIGN_RSA_PKCS1_MD5_SHA1 is an internal signature algorithm used to
* specify raw RSASSA-PKCS1-v1_5 with an MD5/SHA-1 concatenation, as used in TLS
* before TLS 1.2. */
#define SSL_SIGN_RSA_PKCS1_MD5_SHA1 0xff01
/* SSL_CTX_set_signing_algorithm_prefs configures |ctx| to use |prefs| as the
* preference list when signing with |ctx|'s private key. It returns one on
* success and zero on error. |prefs| should not include the internal-only value
* |SSL_SIGN_RSA_PKCS1_MD5_SHA1|. */
OPENSSL_EXPORT int SSL_CTX_set_signing_algorithm_prefs(SSL_CTX *ctx,
const uint16_t *prefs,
size_t num_prefs);
/* SSL_set_signing_algorithm_prefs configures |ssl| to use |prefs| as the
* preference list when signing with |ssl|'s private key. It returns one on
* success and zero on error. |prefs| should not include the internal-only value
* |SSL_SIGN_RSA_PKCS1_MD5_SHA1|. */
OPENSSL_EXPORT int SSL_set_signing_algorithm_prefs(SSL *ssl,
const uint16_t *prefs,
size_t num_prefs);
/* Certificate and private key convenience functions. */
/* SSL_CTX_set_chain_and_key sets the certificate chain and private key for a
* TLS client or server. References to the given |CRYPTO_BUFFER| and |EVP_PKEY|
* objects are added as needed. Exactly one of |privkey| or |privkey_method|
* may be non-NULL. Returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_CTX_set_chain_and_key(
SSL_CTX *ctx, CRYPTO_BUFFER *const *certs, size_t num_certs,
EVP_PKEY *privkey, const SSL_PRIVATE_KEY_METHOD *privkey_method);
/* SSL_set_chain_and_key sets the certificate chain and private key for a TLS
* client or server. References to the given |CRYPTO_BUFFER| and |EVP_PKEY|
* objects are added as needed. Exactly one of |privkey| or |privkey_method|
* may be non-NULL. Returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_set_chain_and_key(
SSL *ssl, CRYPTO_BUFFER *const *certs, size_t num_certs, EVP_PKEY *privkey,
const SSL_PRIVATE_KEY_METHOD *privkey_method);
/* SSL_CTX_use_RSAPrivateKey sets |ctx|'s private key to |rsa|. It returns one
* on success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);
/* SSL_use_RSAPrivateKey sets |ctx|'s private key to |rsa|. It returns one on
* success and zero on failure. */
OPENSSL_EXPORT int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);
/* The following functions configure certificates or private keys but take as
* input DER-encoded structures. They return one on success and zero on
* failure. */
OPENSSL_EXPORT int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, size_t der_len,
const uint8_t *der);
OPENSSL_EXPORT int SSL_use_certificate_ASN1(SSL *ssl, const uint8_t *der,
size_t der_len);
OPENSSL_EXPORT int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx,
const uint8_t *der,
size_t der_len);
OPENSSL_EXPORT int SSL_use_PrivateKey_ASN1(int type, SSL *ssl,
const uint8_t *der, size_t der_len);
OPENSSL_EXPORT int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx,
const uint8_t *der,
size_t der_len);
OPENSSL_EXPORT int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const uint8_t *der,
size_t der_len);
/* The following functions configure certificates or private keys but take as
* input files to read from. They return one on success and zero on failure. The
* |type| parameter is one of the |SSL_FILETYPE_*| values and determines whether
* the file's contents are read as PEM or DER. */
#define SSL_FILETYPE_ASN1 X509_FILETYPE_ASN1
#define SSL_FILETYPE_PEM X509_FILETYPE_PEM
OPENSSL_EXPORT int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx,
const char *file,
int type);
OPENSSL_EXPORT int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file,
int type);
OPENSSL_EXPORT int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file,
int type);
OPENSSL_EXPORT int SSL_use_certificate_file(SSL *ssl, const char *file,
int type);
OPENSSL_EXPORT int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file,
int type);
OPENSSL_EXPORT int SSL_use_PrivateKey_file(SSL *ssl, const char *file,
int type);
/* SSL_CTX_use_certificate_chain_file configures certificates for |ctx|. It
* reads the contents of |file| as a PEM-encoded leaf certificate followed
* optionally by the certificate chain to send to the peer. It returns one on
* success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx,
const char *file);
/* SSL_CTX_set_default_passwd_cb sets the password callback for PEM-based
* convenience functions called on |ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,
pem_password_cb *cb);
/* SSL_CTX_set_default_passwd_cb_userdata sets the userdata parameter for
* |ctx|'s password callback. */
OPENSSL_EXPORT void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,
void *data);
/* Custom private keys. */
enum ssl_private_key_result_t {
ssl_private_key_success,
ssl_private_key_retry,
ssl_private_key_failure,
};
/* ssl_private_key_method_st (aka |SSL_PRIVATE_KEY_METHOD|) describes private
* key hooks. This is used to off-load signing operations to a custom,
* potentially asynchronous, backend. Metadata about the key such as the type
* and size are parsed out of the certificate.
*
* TODO(davidben): This API has a number of legacy hooks. Remove the last
* consumer of |sign_digest| and trim it. */
struct ssl_private_key_method_st {
/* type is ignored and should be NULL. */
int (*type)(SSL *ssl);
/* max_signature_len is ignored and should be NULL. */
size_t (*max_signature_len)(SSL *ssl);
/* sign signs the message |in| in using the specified signature algorithm. On
* success, it returns |ssl_private_key_success| and writes at most |max_out|
* bytes of signature data to |out| and sets |*out_len| to the number of bytes
* written. On failure, it returns |ssl_private_key_failure|. If the operation
* has not completed, it returns |ssl_private_key_retry|. |sign| should
* arrange for the high-level operation on |ssl| to be retried when the
* operation is completed. This will result in a call to |complete|.
*
* |signature_algorithm| is one of the |SSL_SIGN_*| values, as defined in TLS
* 1.3. Note that, in TLS 1.2, ECDSA algorithms do not require that curve
* sizes match hash sizes, so the curve portion of |SSL_SIGN_ECDSA_*| values
* must be ignored. BoringSSL will internally handle the curve matching logic
* where appropriate.
*
* It is an error to call |sign| while another private key operation is in
* progress on |ssl|. */
enum ssl_private_key_result_t (*sign)(SSL *ssl, uint8_t *out, size_t *out_len,
size_t max_out,
uint16_t signature_algorithm,
const uint8_t *in, size_t in_len);
/* sign_digest signs |in_len| bytes of digest from |in|. |md| is the hash
* function used to calculate |in|. On success, it returns
* |ssl_private_key_success| and writes at most |max_out| bytes of signature
* data to |out|. On failure, it returns |ssl_private_key_failure|. If the
* operation has not completed, it returns |ssl_private_key_retry|. |sign|
* should arrange for the high-level operation on |ssl| to be retried when the
* operation is completed. This will result in a call to |complete|.
*
* If the key is an RSA key, implementations must use PKCS#1 padding. |in| is
* the digest itself, so the DigestInfo prefix, if any, must be prepended by
* |sign|. If |md| is |EVP_md5_sha1|, there is no prefix.
*
* It is an error to call |sign_digest| while another private key operation is
* in progress on |ssl|.
*
* This function is deprecated. Implement |sign| instead.
*
* TODO(davidben): Remove this function. */
enum ssl_private_key_result_t (*sign_digest)(SSL *ssl, uint8_t *out,
size_t *out_len, size_t max_out,
const EVP_MD *md,
const uint8_t *in,
size_t in_len);
/* decrypt decrypts |in_len| bytes of encrypted data from |in|. On success it
* returns |ssl_private_key_success|, writes at most |max_out| bytes of
* decrypted data to |out| and sets |*out_len| to the actual number of bytes
* written. On failure it returns |ssl_private_key_failure|. If the operation
* has not completed, it returns |ssl_private_key_retry|. The caller should
* arrange for the high-level operation on |ssl| to be retried when the
* operation is completed, which will result in a call to |complete|. This
* function only works with RSA keys and should perform a raw RSA decryption
* operation with no padding.
*
* It is an error to call |decrypt| while another private key operation is in
* progress on |ssl|. */
enum ssl_private_key_result_t (*decrypt)(SSL *ssl, uint8_t *out,
size_t *out_len, size_t max_out,
const uint8_t *in, size_t in_len);
/* complete completes a pending operation. If the operation has completed, it
* returns |ssl_private_key_success| and writes the result to |out| as in
* |sign|. Otherwise, it returns |ssl_private_key_failure| on failure and
* |ssl_private_key_retry| if the operation is still in progress.
*
* |complete| may be called arbitrarily many times before completion, but it
* is an error to call |complete| if there is no pending operation in progress
* on |ssl|. */
enum ssl_private_key_result_t (*complete)(SSL *ssl, uint8_t *out,
size_t *out_len, size_t max_out);
};
/* SSL_set_private_key_method configures a custom private key on |ssl|.
* |key_method| must remain valid for the lifetime of |ssl|. */
OPENSSL_EXPORT void SSL_set_private_key_method(
SSL *ssl, const SSL_PRIVATE_KEY_METHOD *key_method);
/* SSL_CTX_set_private_key_method configures a custom private key on |ctx|.
* |key_method| must remain valid for the lifetime of |ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_private_key_method(
SSL_CTX *ctx, const SSL_PRIVATE_KEY_METHOD *key_method);
/* Cipher suites.
*
* |SSL_CIPHER| objects represent cipher suites. */
DEFINE_CONST_STACK_OF(SSL_CIPHER)
/* SSL_get_cipher_by_value returns the structure representing a TLS cipher
* suite based on its assigned number, or NULL if unknown. See
* https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4. */
OPENSSL_EXPORT const SSL_CIPHER *SSL_get_cipher_by_value(uint16_t value);
/* SSL_CIPHER_get_id returns |cipher|'s id. It may be cast to a |uint16_t| to
* get the cipher suite value. */
OPENSSL_EXPORT uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AES returns one if |cipher| uses AES (either GCM or CBC
* mode). */
OPENSSL_EXPORT int SSL_CIPHER_is_AES(const SSL_CIPHER *cipher);
/* SSL_CIPHER_has_SHA1_HMAC returns one if |cipher| uses HMAC-SHA1. */
OPENSSL_EXPORT int SSL_CIPHER_has_SHA1_HMAC(const SSL_CIPHER *cipher);
/* SSL_CIPHER_has_SHA256_HMAC returns one if |cipher| uses HMAC-SHA256. */
OPENSSL_EXPORT int SSL_CIPHER_has_SHA256_HMAC(const SSL_CIPHER *cipher);
/* SSL_CIPHER_has_SHA384_HMAC returns one if |cipher| uses HMAC-SHA384. */
OPENSSL_EXPORT int SSL_CIPHER_has_SHA384_HMAC(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AEAD returns one if |cipher| uses an AEAD cipher. */
OPENSSL_EXPORT int SSL_CIPHER_is_AEAD(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AESGCM returns one if |cipher| uses AES-GCM. */
OPENSSL_EXPORT int SSL_CIPHER_is_AESGCM(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AES128GCM returns one if |cipher| uses 128-bit AES-GCM. */
OPENSSL_EXPORT int SSL_CIPHER_is_AES128GCM(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AES128CBC returns one if |cipher| uses 128-bit AES in CBC
* mode. */
OPENSSL_EXPORT int SSL_CIPHER_is_AES128CBC(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_AES256CBC returns one if |cipher| uses 256-bit AES in CBC
* mode. */
OPENSSL_EXPORT int SSL_CIPHER_is_AES256CBC(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_CHACHA20POLY1305 returns one if |cipher| uses
* CHACHA20_POLY1305. Note this includes both the RFC 7905 and
* draft-agl-tls-chacha20poly1305-04 versions. */
OPENSSL_EXPORT int SSL_CIPHER_is_CHACHA20POLY1305(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_NULL returns one if |cipher| does not encrypt. */
OPENSSL_EXPORT int SSL_CIPHER_is_NULL(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_block_cipher returns one if |cipher| is a block cipher. */
OPENSSL_EXPORT int SSL_CIPHER_is_block_cipher(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_ECDSA returns one if |cipher| uses ECDSA. */
OPENSSL_EXPORT int SSL_CIPHER_is_ECDSA(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_ECDHE returns one if |cipher| uses ECDHE. */
OPENSSL_EXPORT int SSL_CIPHER_is_ECDHE(const SSL_CIPHER *cipher);
/* SSL_CIPHER_is_static_RSA returns one if |cipher| uses the static RSA key
* exchange. */
OPENSSL_EXPORT int SSL_CIPHER_is_static_RSA(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_min_version returns the minimum protocol version required
* for |cipher|. */
OPENSSL_EXPORT uint16_t SSL_CIPHER_get_min_version(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_max_version returns the maximum protocol version that
* supports |cipher|. */
OPENSSL_EXPORT uint16_t SSL_CIPHER_get_max_version(const SSL_CIPHER *cipher);
/* SSL_CIPHER_standard_name returns the standard IETF name for |cipher|. For
* example, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256". */
OPENSSL_EXPORT const char *SSL_CIPHER_standard_name(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_name returns the OpenSSL name of |cipher|. For example,
* "ECDHE-RSA-AES128-GCM-SHA256". */
OPENSSL_EXPORT const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_kx_name returns a string that describes the key-exchange
* method used by |cipher|. For example, "ECDHE_ECDSA". TLS 1.3 AEAD-only
* ciphers return the string "GENERIC". */
OPENSSL_EXPORT const char *SSL_CIPHER_get_kx_name(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_bits returns the strength, in bits, of |cipher|. If
* |out_alg_bits| is not NULL, it writes the number of bits consumed by the
* symmetric algorithm to |*out_alg_bits|. */
OPENSSL_EXPORT int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher,
int *out_alg_bits);
/* Cipher suite configuration.
*
* OpenSSL uses a mini-language to configure cipher suites. The language
* maintains an ordered list of enabled ciphers, along with an ordered list of
* disabled but available ciphers. Initially, all ciphers are disabled with a
* default ordering. The cipher string is then interpreted as a sequence of
* directives, separated by colons, each of which modifies this state.
*
* Most directives consist of a one character or empty opcode followed by a
* selector which matches a subset of available ciphers.
*
* Available opcodes are:
*
* The empty opcode enables and appends all matching disabled ciphers to the
* end of the enabled list. The newly appended ciphers are ordered relative to
* each other matching their order in the disabled list.
*
* |-| disables all matching enabled ciphers and prepends them to the disabled
* list, with relative order from the enabled list preserved. This means the
* most recently disabled ciphers get highest preference relative to other
* disabled ciphers if re-enabled.
*
* |+| moves all matching enabled ciphers to the end of the enabled list, with
* relative order preserved.
*
* |!| deletes all matching ciphers, enabled or not, from either list. Deleted
* ciphers will not matched by future operations.
*
* A selector may be a specific cipher (using either the standard or OpenSSL
* name for the cipher) or one or more rules separated by |+|. The final
* selector matches the intersection of each rule. For instance, |AESGCM+aECDSA|
* matches ECDSA-authenticated AES-GCM ciphers.
*
* Available cipher rules are:
*
* |ALL| matches all ciphers.
*
* |kRSA|, |kDHE|, |kECDHE|, and |kPSK| match ciphers using plain RSA, DHE,
* ECDHE, and plain PSK key exchanges, respectively. Note that ECDHE_PSK is
* matched by |kECDHE| and not |kPSK|.
*
* |aRSA|, |aECDSA|, and |aPSK| match ciphers authenticated by RSA, ECDSA, and
* a pre-shared key, respectively.
*
* |RSA|, |DHE|, |ECDHE|, |PSK|, |ECDSA|, and |PSK| are aliases for the
* corresponding |k*| or |a*| cipher rule. |RSA| is an alias for |kRSA|, not
* |aRSA|.
*
* |3DES|, |AES128|, |AES256|, |AES|, |AESGCM|, |CHACHA20| match ciphers
* whose bulk cipher use the corresponding encryption scheme. Note that
* |AES|, |AES128|, and |AES256| match both CBC and GCM ciphers.
*
* |SHA1|, |SHA256|, and |SHA384| match legacy cipher suites using the
* corresponding hash function in their MAC. AEADs are matched by none of
* these.
*
* |SHA| is an alias for |SHA1|.
*
* Although implemented, authentication-only ciphers match no rules and must be
* explicitly selected by name.
*
* Deprecated cipher rules:
*
* |kEDH|, |EDH|, |kEECDH|, and |EECDH| are legacy aliases for |kDHE|, |DHE|,
* |kECDHE|, and |ECDHE|, respectively.
*
* |HIGH| is an alias for |ALL|.
*
* |FIPS| is an alias for |HIGH|.
*
* |SSLv3| and |TLSv1| match ciphers available in TLS 1.1 or earlier.
* |TLSv1_2| matches ciphers new in TLS 1.2. This is confusing and should not
* be used.
*
* Unknown rules are silently ignored by legacy APIs, and rejected by APIs with
* "strict" in the name, which should be preferred. Cipher lists can be long and
* it's easy to commit typos.
*
* The special |@STRENGTH| directive will sort all enabled ciphers by strength.
*
* The |DEFAULT| directive, when appearing at the front of the string, expands
* to the default ordering of available ciphers.
*
* If configuring a server, one may also configure equal-preference groups to
* partially respect the client's preferences when
* |SSL_OP_CIPHER_SERVER_PREFERENCE| is enabled. Ciphers in an equal-preference
* group have equal priority and use the client order. This may be used to
* enforce that AEADs are preferred but select AES-GCM vs. ChaCha20-Poly1305
* based on client preferences. An equal-preference is specified with square
* brackets, combining multiple selectors separated by |. For example:
*
* [ECDHE-ECDSA-CHACHA20-POLY1305|ECDHE-ECDSA-AES128-GCM-SHA256]
*
* Once an equal-preference group is used, future directives must be
* opcode-less.
*
* TLS 1.3 ciphers do not participate in this mechanism and instead have a
* built-in preference order. Functions to set cipher lists do not affect TLS
* 1.3, and functions to query the cipher list do not include TLS 1.3
* ciphers. */
/* SSL_DEFAULT_CIPHER_LIST is the default cipher suite configuration. It is
* substituted when a cipher string starts with 'DEFAULT'. */
#define SSL_DEFAULT_CIPHER_LIST "ALL"
/* SSL_CTX_set_strict_cipher_list configures the cipher list for |ctx|,
* evaluating |str| as a cipher string and returning error if |str| contains
* anything meaningless. It returns one on success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_set_strict_cipher_list(SSL_CTX *ctx,
const char *str);
/* SSL_CTX_set_cipher_list configures the cipher list for |ctx|, evaluating
* |str| as a cipher string. It returns one on success and zero on failure.
*
* Prefer to use |SSL_CTX_set_strict_cipher_list|. This function tolerates
* garbage inputs, unless an empty cipher list results. */
OPENSSL_EXPORT int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str);
/* SSL_set_strict_cipher_list configures the cipher list for |ssl|, evaluating
* |str| as a cipher string and returning error if |str| contains anything
* meaningless. It returns one on success and zero on failure. */
OPENSSL_EXPORT int SSL_set_strict_cipher_list(SSL *ssl, const char *str);
/* SSL_set_cipher_list configures the cipher list for |ssl|, evaluating |str| as
* a cipher string. It returns one on success and zero on failure.
*
* Prefer to use |SSL_set_strict_cipher_list|. This function tolerates garbage
* inputs, unless an empty cipher list results. */
OPENSSL_EXPORT int SSL_set_cipher_list(SSL *ssl, const char *str);
/* SSL_CTX_get_ciphers returns the cipher list for |ctx|, in order of
* preference. */
OPENSSL_EXPORT STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx);
/* SSL_get_ciphers returns the cipher list for |ssl|, in order of preference. */
OPENSSL_EXPORT STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *ssl);
/* Connection information. */
/* SSL_is_init_finished returns one if |ssl| has completed its initial handshake
* and has no pending handshake. It returns zero otherwise. */
OPENSSL_EXPORT int SSL_is_init_finished(const SSL *ssl);
/* SSL_in_init returns one if |ssl| has a pending handshake and zero
* otherwise. */
OPENSSL_EXPORT int SSL_in_init(const SSL *ssl);
/* SSL_in_false_start returns one if |ssl| has a pending handshake that is in
* False Start. |SSL_write| may be called at this point without waiting for the
* peer, but |SSL_read| will complete the handshake before accepting application
* data.
*
* See also |SSL_MODE_ENABLE_FALSE_START|. */
OPENSSL_EXPORT int SSL_in_false_start(const SSL *ssl);
/* SSL_get_peer_certificate returns the peer's leaf certificate or NULL if the
* peer did not use certificates. The caller must call |X509_free| on the
* result to release it. */
OPENSSL_EXPORT X509 *SSL_get_peer_certificate(const SSL *ssl);
/* SSL_get_peer_cert_chain returns the peer's certificate chain or NULL if
* unavailable or the peer did not use certificates. This is the unverified list
* of certificates as sent by the peer, not the final chain built during
* verification. The caller does not take ownership of the result.
*
* WARNING: This function behaves differently between client and server. If
* |ssl| is a server, the returned chain does not include the leaf certificate.
* If a client, it does. */
OPENSSL_EXPORT STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *ssl);
/* SSL_get_peer_full_cert_chain returns the peer's certificate chain, or NULL if
* unavailable or the peer did not use certificates. This is the unverified list
* of certificates as sent by the peer, not the final chain built during
* verification. The caller does not take ownership of the result.
*
* This is the same as |SSL_get_peer_cert_chain| except that this function
* always returns the full chain, i.e. the first element of the return value
* (if any) will be the leaf certificate. In constrast,
* |SSL_get_peer_cert_chain| returns only the intermediate certificates if the
* |ssl| is a server. */
OPENSSL_EXPORT STACK_OF(X509) *SSL_get_peer_full_cert_chain(const SSL *ssl);
/* SSL_get0_peer_certificates returns the peer's certificate chain, or NULL if
* unavailable or the peer did not use certificates. This is the unverified list
* of certificates as sent by the peer, not the final chain built during
* verification. The caller does not take ownership of the result.
*
* This is the |CRYPTO_BUFFER| variant of |SSL_get_peer_full_cert_chain|. */
OPENSSL_EXPORT STACK_OF(CRYPTO_BUFFER) *
SSL_get0_peer_certificates(const SSL *ssl);
/* SSL_get0_signed_cert_timestamp_list sets |*out| and |*out_len| to point to
* |*out_len| bytes of SCT information from the server. This is only valid if
* |ssl| is a client. The SCT information is a SignedCertificateTimestampList
* (including the two leading length bytes).
* See https://tools.ietf.org/html/rfc6962#section-3.3
* If no SCT was received then |*out_len| will be zero on return.
*
* WARNING: the returned data is not guaranteed to be well formed. */
OPENSSL_EXPORT void SSL_get0_signed_cert_timestamp_list(const SSL *ssl,
const uint8_t **out,
size_t *out_len);
/* SSL_get0_ocsp_response sets |*out| and |*out_len| to point to |*out_len|
* bytes of an OCSP response from the server. This is the DER encoding of an
* OCSPResponse type as defined in RFC 2560.
*
* WARNING: the returned data is not guaranteed to be well formed. */
OPENSSL_EXPORT void SSL_get0_ocsp_response(const SSL *ssl, const uint8_t **out,
size_t *out_len);
/* SSL_get_tls_unique writes at most |max_out| bytes of the tls-unique value
* for |ssl| to |out| and sets |*out_len| to the number of bytes written. It
* returns one on success or zero on error. In general |max_out| should be at
* least 12.
*
* This function will always fail if the initial handshake has not completed.
* The tls-unique value will change after a renegotiation but, since
* renegotiations can be initiated by the server at any point, the higher-level
* protocol must either leave them disabled or define states in which the
* tls-unique value can be read.
*
* The tls-unique value is defined by
* https://tools.ietf.org/html/rfc5929#section-3.1. Due to a weakness in the
* TLS protocol, tls-unique is broken for resumed connections unless the
* Extended Master Secret extension is negotiated. Thus this function will
* return zero if |ssl| performed session resumption unless EMS was used when
* negotiating the original session. */
OPENSSL_EXPORT int SSL_get_tls_unique(const SSL *ssl, uint8_t *out,
size_t *out_len, size_t max_out);
/* SSL_get_extms_support returns one if the Extended Master Secret extension or
* TLS 1.3 was negotiated. Otherwise, it returns zero. */
OPENSSL_EXPORT int SSL_get_extms_support(const SSL *ssl);
/* SSL_get_current_cipher returns the cipher used in the current outgoing
* connection state, or NULL if the null cipher is active. */
OPENSSL_EXPORT const SSL_CIPHER *SSL_get_current_cipher(const SSL *ssl);
/* SSL_session_reused returns one if |ssl| performed an abbreviated handshake
* and zero otherwise.
*
* TODO(davidben): Hammer down the semantics of this API while a handshake,
* initial or renego, is in progress. */
OPENSSL_EXPORT int SSL_session_reused(const SSL *ssl);
/* SSL_get_secure_renegotiation_support returns one if the peer supports secure
* renegotiation (RFC 5746) or TLS 1.3. Otherwise, it returns zero. */
OPENSSL_EXPORT int SSL_get_secure_renegotiation_support(const SSL *ssl);
/* SSL_export_keying_material exports a value derived from the master secret, as
* specified in RFC 5705. It writes |out_len| bytes to |out| given a label and
* optional context. (Since a zero length context is allowed, the |use_context|
* flag controls whether a context is included.)
*
* It returns one on success and zero otherwise. */
OPENSSL_EXPORT int SSL_export_keying_material(
SSL *ssl, uint8_t *out, size_t out_len, const char *label, size_t label_len,
const uint8_t *context, size_t context_len, int use_context);
/* Custom extensions.
*
* The custom extension functions allow TLS extensions to be added to
* ClientHello and ServerHello messages. */
/* SSL_custom_ext_add_cb is a callback function that is called when the
* ClientHello (for clients) or ServerHello (for servers) is constructed. In
* the case of a server, this callback will only be called for a given
* extension if the ClientHello contained that extension – it's not possible to
* inject extensions into a ServerHello that the client didn't request.
*
* When called, |extension_value| will contain the extension number that is
* being considered for addition (so that a single callback can handle multiple
* extensions). If the callback wishes to include the extension, it must set
* |*out| to point to |*out_len| bytes of extension contents and return one. In
* this case, the corresponding |SSL_custom_ext_free_cb| callback will later be
* called with the value of |*out| once that data has been copied.
*
* If the callback does not wish to add an extension it must return zero.
*
* Alternatively, the callback can abort the connection by setting
* |*out_alert_value| to a TLS alert number and returning -1. */
typedef int (*SSL_custom_ext_add_cb)(SSL *ssl, unsigned extension_value,
const uint8_t **out, size_t *out_len,
int *out_alert_value, void *add_arg);
/* SSL_custom_ext_free_cb is a callback function that is called by OpenSSL iff
* an |SSL_custom_ext_add_cb| callback previously returned one. In that case,
* this callback is called and passed the |out| pointer that was returned by
* the add callback. This is to free any dynamically allocated data created by
* the add callback. */
typedef void (*SSL_custom_ext_free_cb)(SSL *ssl, unsigned extension_value,
const uint8_t *out, void *add_arg);
/* SSL_custom_ext_parse_cb is a callback function that is called by OpenSSL to
* parse an extension from the peer: that is from the ServerHello for a client
* and from the ClientHello for a server.
*
* When called, |extension_value| will contain the extension number and the
* contents of the extension are |contents_len| bytes at |contents|.
*
* The callback must return one to continue the handshake. Otherwise, if it
* returns zero, a fatal alert with value |*out_alert_value| is sent and the
* handshake is aborted. */
typedef int (*SSL_custom_ext_parse_cb)(SSL *ssl, unsigned extension_value,
const uint8_t *contents,
size_t contents_len,
int *out_alert_value, void *parse_arg);
/* SSL_extension_supported returns one iff OpenSSL internally handles
* extensions of type |extension_value|. This can be used to avoid registering
* custom extension handlers for extensions that a future version of OpenSSL
* may handle internally. */
OPENSSL_EXPORT int SSL_extension_supported(unsigned extension_value);
/* SSL_CTX_add_client_custom_ext registers callback functions for handling
* custom TLS extensions for client connections.
*
* If |add_cb| is NULL then an empty extension will be added in each
* ClientHello. Otherwise, see the comment for |SSL_custom_ext_add_cb| about
* this callback.
*
* The |free_cb| may be NULL if |add_cb| doesn't dynamically allocate data that
* needs to be freed.
*
* It returns one on success or zero on error. It's always an error to register
* callbacks for the same extension twice, or to register callbacks for an
* extension that OpenSSL handles internally. See |SSL_extension_supported| to
* discover, at runtime, which extensions OpenSSL handles internally. */
OPENSSL_EXPORT int SSL_CTX_add_client_custom_ext(
SSL_CTX *ctx, unsigned extension_value, SSL_custom_ext_add_cb add_cb,
SSL_custom_ext_free_cb free_cb, void *add_arg,
SSL_custom_ext_parse_cb parse_cb, void *parse_arg);
/* SSL_CTX_add_server_custom_ext is the same as
* |SSL_CTX_add_client_custom_ext|, but for server connections.
*
* Unlike on the client side, if |add_cb| is NULL no extension will be added.
* The |add_cb|, if any, will only be called if the ClientHello contained a
* matching extension. */
OPENSSL_EXPORT int SSL_CTX_add_server_custom_ext(
SSL_CTX *ctx, unsigned extension_value, SSL_custom_ext_add_cb add_cb,
SSL_custom_ext_free_cb free_cb, void *add_arg,
SSL_custom_ext_parse_cb parse_cb, void *parse_arg);
/* Sessions.
*
* An |SSL_SESSION| represents an SSL session that may be resumed in an
* abbreviated handshake. It is reference-counted and immutable. Once
* established, an |SSL_SESSION| may be shared by multiple |SSL| objects on
* different threads and must not be modified. */
DECLARE_LHASH_OF(SSL_SESSION)
DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
/* SSL_SESSION_new returns a newly-allocated blank |SSL_SESSION| or NULL on
* error. This may be useful when writing tests but should otherwise not be
* used. */
OPENSSL_EXPORT SSL_SESSION *SSL_SESSION_new(const SSL_CTX *ctx);
/* SSL_SESSION_up_ref increments the reference count of |session| and returns
* one. */
OPENSSL_EXPORT int SSL_SESSION_up_ref(SSL_SESSION *session);
/* SSL_SESSION_free decrements the reference count of |session|. If it reaches
* zero, all data referenced by |session| and |session| itself are released. */
OPENSSL_EXPORT void SSL_SESSION_free(SSL_SESSION *session);
/* SSL_SESSION_to_bytes serializes |in| into a newly allocated buffer and sets
* |*out_data| to that buffer and |*out_len| to its length. The caller takes
* ownership of the buffer and must call |OPENSSL_free| when done. It returns
* one on success and zero on error. */
OPENSSL_EXPORT int SSL_SESSION_to_bytes(const SSL_SESSION *in,
uint8_t **out_data, size_t *out_len);
/* SSL_SESSION_to_bytes_for_ticket serializes |in|, but excludes the session
* identification information, namely the session ID and ticket. */
OPENSSL_EXPORT int SSL_SESSION_to_bytes_for_ticket(const SSL_SESSION *in,
uint8_t **out_data,
size_t *out_len);
/* SSL_SESSION_from_bytes parses |in_len| bytes from |in| as an SSL_SESSION. It
* returns a newly-allocated |SSL_SESSION| on success or NULL on error. */
OPENSSL_EXPORT SSL_SESSION *SSL_SESSION_from_bytes(
const uint8_t *in, size_t in_len, const SSL_CTX *ctx);
/* SSL_SESSION_get_version returns a string describing the TLS version |session|
* was established at. For example, "TLSv1.2" or "SSLv3". */
OPENSSL_EXPORT const char *SSL_SESSION_get_version(const SSL_SESSION *session);
/* SSL_SESSION_get_id returns a pointer to a buffer containing |session|'s
* session ID and sets |*out_len| to its length. */
OPENSSL_EXPORT const uint8_t *SSL_SESSION_get_id(const SSL_SESSION *session,
unsigned *out_len);
/* SSL_SESSION_get_time returns the time at which |session| was established in
* seconds since the UNIX epoch. */
OPENSSL_EXPORT uint64_t SSL_SESSION_get_time(const SSL_SESSION *session);
/* SSL_SESSION_get_timeout returns the lifetime of |session| in seconds. */
OPENSSL_EXPORT uint32_t SSL_SESSION_get_timeout(const SSL_SESSION *session);
/* SSL_SESSION_get0_peer returns the peer leaf certificate stored in
* |session|.
*
* TODO(davidben): This should return a const X509 *. */
OPENSSL_EXPORT X509 *SSL_SESSION_get0_peer(const SSL_SESSION *session);
/* SSL_SESSION_get_master_key writes up to |max_out| bytes of |session|'s master
* secret to |out| and returns the number of bytes written. If |max_out| is
* zero, it returns the size of the master secret. */
OPENSSL_EXPORT size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
uint8_t *out, size_t max_out);
/* SSL_SESSION_set_time sets |session|'s creation time to |time| and returns
* |time|. This function may be useful in writing tests but otherwise should not
* be used. */
OPENSSL_EXPORT uint64_t SSL_SESSION_set_time(SSL_SESSION *session,
uint64_t time);
/* SSL_SESSION_set_timeout sets |session|'s timeout to |timeout| and returns
* one. This function may be useful in writing tests but otherwise should not
* be used. */
OPENSSL_EXPORT uint32_t SSL_SESSION_set_timeout(SSL_SESSION *session,
uint32_t timeout);
/* SSL_SESSION_set1_id_context sets |session|'s session ID context (see
* |SSL_CTX_set_session_id_context|) to |sid_ctx|. It returns one on success and
* zero on error. This function may be useful in writing tests but otherwise
* should not be used. */
OPENSSL_EXPORT int SSL_SESSION_set1_id_context(SSL_SESSION *session,
const uint8_t *sid_ctx,
size_t sid_ctx_len);
/* Session caching.
*
* Session caching allows connections to be established more efficiently based
* on saved parameters from a previous connection, called a session (see
* |SSL_SESSION|). The client offers a saved session, using an opaque identifier
* from a previous connection. The server may accept the session, if it has the
* parameters available. Otherwise, it will decline and continue with a full
* handshake.
*
* This requires both the client and the server to retain session state. A
* client does so with a stateful session cache. A server may do the same or, if
* supported by both sides, statelessly using session tickets. For more
* information on the latter, see the next section.
*
* For a server, the library implements a built-in internal session cache as an
* in-memory hash table. Servers may also use |SSL_CTX_sess_set_get_cb| and
* |SSL_CTX_sess_set_new_cb| to implement a custom external session cache. In
* particular, this may be used to share a session cache between multiple
* servers in a large deployment. An external cache may be used in addition to
* or instead of the internal one. Use |SSL_CTX_set_session_cache_mode| to
* toggle the internal cache.
*
* For a client, the only option is an external session cache. Clients may use
* |SSL_CTX_sess_set_new_cb| to register a callback for when new sessions are
* available. These may be cached and, in subsequent compatible connections,
* configured with |SSL_set_session|.
*
* Note that offering or accepting a session short-circuits certificate
* verification and most parameter negotiation. Resuming sessions across
* different contexts may result in security failures and surprising
* behavior. For a typical client, this means sessions for different hosts must
* be cached under different keys. A client that connects to the same host with,
* e.g., different cipher suite settings or client certificates should also use
* separate session caches between those contexts. Servers should also partition
* session caches between SNI hosts with |SSL_CTX_set_session_id_context|. */
/* SSL_SESS_CACHE_OFF disables all session caching. */
#define SSL_SESS_CACHE_OFF 0x0000
/* SSL_SESS_CACHE_CLIENT enables session caching for a client. The internal
* cache is never used on a client, so this only enables the callbacks. */
#define SSL_SESS_CACHE_CLIENT 0x0001
/* SSL_SESS_CACHE_SERVER enables session caching for a server. */
#define SSL_SESS_CACHE_SERVER 0x0002
/* SSL_SESS_CACHE_BOTH enables session caching for both client and server. */
#define SSL_SESS_CACHE_BOTH (SSL_SESS_CACHE_CLIENT | SSL_SESS_CACHE_SERVER)
/* SSL_SESS_CACHE_NO_AUTO_CLEAR disables automatically calling
* |SSL_CTX_flush_sessions| every 255 connections. */
#define SSL_SESS_CACHE_NO_AUTO_CLEAR 0x0080
/* SSL_SESS_CACHE_NO_INTERNAL_LOOKUP, on a server, disables looking up a session
* from the internal session cache. */
#define SSL_SESS_CACHE_NO_INTERNAL_LOOKUP 0x0100
/* SSL_SESS_CACHE_NO_INTERNAL_STORE, on a server, disables storing sessions in
* the internal session cache. */
#define SSL_SESS_CACHE_NO_INTERNAL_STORE 0x0200
/* SSL_SESS_CACHE_NO_INTERNAL, on a server, disables the internal session
* cache. */
#define SSL_SESS_CACHE_NO_INTERNAL \
(SSL_SESS_CACHE_NO_INTERNAL_LOOKUP | SSL_SESS_CACHE_NO_INTERNAL_STORE)
/* SSL_CTX_set_session_cache_mode sets the session cache mode bits for |ctx| to
* |mode|. It returns the previous value. */
OPENSSL_EXPORT int SSL_CTX_set_session_cache_mode(SSL_CTX *ctx, int mode);
/* SSL_CTX_get_session_cache_mode returns the session cache mode bits for
* |ctx| */
OPENSSL_EXPORT int SSL_CTX_get_session_cache_mode(const SSL_CTX *ctx);
/* SSL_set_session, for a client, configures |ssl| to offer to resume |session|
* in the initial handshake and returns one. The caller retains ownership of
* |session|.
*
* It is an error to call this function after the handshake has begun. */
OPENSSL_EXPORT int SSL_set_session(SSL *ssl, SSL_SESSION *session);
/* SSL_DEFAULT_SESSION_TIMEOUT is the default lifetime, in seconds, of a
* session in TLS 1.2 or earlier. This is how long we are willing to use the
* secret to encrypt traffic without fresh key material. */
#define SSL_DEFAULT_SESSION_TIMEOUT (2 * 60 * 60)
/* SSL_DEFAULT_SESSION_PSK_DHE_TIMEOUT is the default lifetime, in seconds, of a
* session for TLS 1.3 psk_dhe_ke. This is how long we are willing to use the
* secret as an authenticator. */
#define SSL_DEFAULT_SESSION_PSK_DHE_TIMEOUT (2 * 24 * 60 * 60)
/* SSL_DEFAULT_SESSION_AUTH_TIMEOUT is the default non-renewable lifetime, in
* seconds, of a TLS 1.3 session. This is how long we are willing to trust the
* signature in the initial handshake. */
#define SSL_DEFAULT_SESSION_AUTH_TIMEOUT (7 * 24 * 60 * 60)
/* SSL_CTX_set_timeout sets the lifetime, in seconds, of TLS 1.2 (or earlier)
* sessions created in |ctx| to |timeout|. */
OPENSSL_EXPORT uint32_t SSL_CTX_set_timeout(SSL_CTX *ctx, uint32_t timeout);
/* SSL_CTX_set_session_psk_dhe_timeout sets the lifetime, in seconds, of TLS 1.3
* sessions created in |ctx| to |timeout|. */
OPENSSL_EXPORT void SSL_CTX_set_session_psk_dhe_timeout(SSL_CTX *ctx,
uint32_t timeout);
/* SSL_CTX_get_timeout returns the lifetime, in seconds, of TLS 1.2 (or earlier)
* sessions created in |ctx|. */
OPENSSL_EXPORT uint32_t SSL_CTX_get_timeout(const SSL_CTX *ctx);
/* SSL_CTX_set_session_id_context sets |ctx|'s session ID context to |sid_ctx|.
* It returns one on success and zero on error. The session ID context is an
* application-defined opaque byte string. A session will not be used in a
* connection without a matching session ID context.
*
* For a server, if |SSL_VERIFY_PEER| is enabled, it is an error to not set a
* session ID context. */
OPENSSL_EXPORT int SSL_CTX_set_session_id_context(SSL_CTX *ctx,
const uint8_t *sid_ctx,
size_t sid_ctx_len);
/* SSL_set_session_id_context sets |ssl|'s session ID context to |sid_ctx|. It
* returns one on success and zero on error. See also
* |SSL_CTX_set_session_id_context|. */
OPENSSL_EXPORT int SSL_set_session_id_context(SSL *ssl, const uint8_t *sid_ctx,
size_t sid_ctx_len);
/* SSL_get0_session_id_context returns a pointer to |ssl|'s session ID context
* and sets |*out_len| to its length. */
OPENSSL_EXPORT const uint8_t *SSL_get0_session_id_context(const SSL *ssl,
size_t *out_len);
/* SSL_SESSION_CACHE_MAX_SIZE_DEFAULT is the default maximum size of a session
* cache. */
#define SSL_SESSION_CACHE_MAX_SIZE_DEFAULT (1024 * 20)
/* SSL_CTX_sess_set_cache_size sets the maximum size of |ctx|'s internal session
* cache to |size|. It returns the previous value. */
OPENSSL_EXPORT unsigned long SSL_CTX_sess_set_cache_size(SSL_CTX *ctx,
unsigned long size);
/* SSL_CTX_sess_get_cache_size returns the maximum size of |ctx|'s internal
* session cache. */
OPENSSL_EXPORT unsigned long SSL_CTX_sess_get_cache_size(const SSL_CTX *ctx);
/* SSL_CTX_sessions returns |ctx|'s internal session cache. */
OPENSSL_EXPORT LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx);
/* SSL_CTX_sess_number returns the number of sessions in |ctx|'s internal
* session cache. */
OPENSSL_EXPORT size_t SSL_CTX_sess_number(const SSL_CTX *ctx);
/* SSL_CTX_add_session inserts |session| into |ctx|'s internal session cache. It
* returns one on success and zero on error or if |session| is already in the
* cache. The caller retains its reference to |session|. */
OPENSSL_EXPORT int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *session);
/* SSL_CTX_remove_session removes |session| from |ctx|'s internal session cache.
* It returns one on success and zero if |session| was not in the cache. */
OPENSSL_EXPORT int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *session);
/* SSL_CTX_flush_sessions removes all sessions from |ctx| which have expired as
* of time |time|. If |time| is zero, all sessions are removed. */
OPENSSL_EXPORT void SSL_CTX_flush_sessions(SSL_CTX *ctx, uint64_t time);
/* SSL_CTX_sess_set_new_cb sets the callback to be called when a new session is
* established and ready to be cached. If the session cache is disabled (the
* appropriate one of |SSL_SESS_CACHE_CLIENT| or |SSL_SESS_CACHE_SERVER| is
* unset), the callback is not called.
*
* The callback is passed a reference to |session|. It returns one if it takes
* ownership and zero otherwise.
*
* Note: For a client, the callback may be called on abbreviated handshakes if a
* ticket is renewed. Further, it may not be called until some time after
* |SSL_do_handshake| or |SSL_connect| completes if False Start is enabled. Thus
* it's recommended to use this callback over checking |SSL_session_reused| on
* handshake completion. */
OPENSSL_EXPORT void SSL_CTX_sess_set_new_cb(
SSL_CTX *ctx, int (*new_session_cb)(SSL *ssl, SSL_SESSION *session));
/* SSL_CTX_sess_get_new_cb returns the callback set by
* |SSL_CTX_sess_set_new_cb|. */
OPENSSL_EXPORT int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(
SSL *ssl, SSL_SESSION *session);
/* SSL_CTX_sess_set_remove_cb sets a callback which is called when a session is
* removed from the internal session cache.
*
* TODO(davidben): What is the point of this callback? It seems useless since it
* only fires on sessions in the internal cache. */
OPENSSL_EXPORT void SSL_CTX_sess_set_remove_cb(
SSL_CTX *ctx,
void (*remove_session_cb)(SSL_CTX *ctx, SSL_SESSION *session));
/* SSL_CTX_sess_get_remove_cb returns the callback set by
* |SSL_CTX_sess_set_remove_cb|. */
OPENSSL_EXPORT void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(
SSL_CTX *ctx, SSL_SESSION *session);
/* SSL_CTX_sess_set_get_cb sets a callback to look up a session by ID for a
* server. The callback is passed the session ID and should return a matching
* |SSL_SESSION| or NULL if not found. It should set |*out_copy| to zero and
* return a new reference to the session. This callback is not used for a
* client.
*
* For historical reasons, if |*out_copy| is set to one (default), the SSL
* library will take a new reference to the returned |SSL_SESSION|, expecting
* the callback to return a non-owning pointer. This is not recommended. If
* |ctx| and thus the callback is used on multiple threads, the session may be
* removed and invalidated before the SSL library calls |SSL_SESSION_up_ref|,
* whereas the callback may synchronize internally.
*
* To look up a session asynchronously, the callback may return
* |SSL_magic_pending_session_ptr|. See the documentation for that function and
* |SSL_ERROR_PENDING_SESSION|.
*
* If the internal session cache is enabled, the callback is only consulted if
* the internal cache does not return a match.
*
* The callback's |id| parameter is not const for historical reasons, but the
* contents may not be modified. */
OPENSSL_EXPORT void SSL_CTX_sess_set_get_cb(
SSL_CTX *ctx,
SSL_SESSION *(*get_session_cb)(SSL *ssl, uint8_t *id, int id_len,
int *out_copy));
/* SSL_CTX_sess_get_get_cb returns the callback set by
* |SSL_CTX_sess_set_get_cb|. */
OPENSSL_EXPORT SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(
SSL *ssl, uint8_t *id, int id_len, int *out_copy);
/* SSL_magic_pending_session_ptr returns a magic |SSL_SESSION|* which indicates
* that the session isn't currently unavailable. |SSL_get_error| will then
* return |SSL_ERROR_PENDING_SESSION| and the handshake can be retried later
* when the lookup has completed. */
OPENSSL_EXPORT SSL_SESSION *SSL_magic_pending_session_ptr(void);
/* Session tickets.
*
* Session tickets, from RFC 5077, allow session resumption without server-side
* state. The server maintains a secret ticket key and sends the client opaque
* encrypted session parameters, called a ticket. When offering the session, the
* client sends the ticket which the server decrypts to recover session state.
* Session tickets are enabled by default but may be disabled with
* |SSL_OP_NO_TICKET|.
*
* On the client, ticket-based sessions use the same APIs as ID-based tickets.
* Callers do not need to handle them differently.
*
* On the server, tickets are encrypted and authenticated with a secret key. By
* default, an |SSL_CTX| generates a key on creation and uses it for the
* lifetime of the |SSL_CTX|. Tickets are minted and processed
* transparently. The following functions may be used to configure a persistent
* key or implement more custom behavior, including key rotation and sharing
* keys between multiple servers in a large deployment. There are three levels
* of customisation possible:
*
* 1) One can simply set the keys with |SSL_CTX_set_tlsext_ticket_keys|.
* 2) One can configure an |EVP_CIPHER_CTX| and |HMAC_CTX| directly for
* encryption and authentication.
* 3) One can configure an |SSL_TICKET_ENCRYPTION_METHOD| to have more control
* and the option of asynchronous decryption.
*
* An attacker that compromises a server's session ticket key can impersonate
* the server and, prior to TLS 1.3, retroactively decrypt all application
* traffic from sessions using that ticket key. Thus ticket keys must be
* regularly rotated for forward secrecy. Note the default key is currently not
* rotated.
*
* TODO(davidben): This is silly. Rotate the default key automatically. */
/* SSL_CTX_get_tlsext_ticket_keys writes |ctx|'s session ticket key material to
* |len| bytes of |out|. It returns one on success and zero if |len| is not
* 48. If |out| is NULL, it returns 48 instead. */
OPENSSL_EXPORT int SSL_CTX_get_tlsext_ticket_keys(SSL_CTX *ctx, void *out,
size_t len);
/* SSL_CTX_set_tlsext_ticket_keys sets |ctx|'s session ticket key material to
* |len| bytes of |in|. It returns one on success and zero if |len| is not
* 48. If |in| is NULL, it returns 48 instead. */
OPENSSL_EXPORT int SSL_CTX_set_tlsext_ticket_keys(SSL_CTX *ctx, const void *in,
size_t len);
/* SSL_TICKET_KEY_NAME_LEN is the length of the key name prefix of a session
* ticket. */
#define SSL_TICKET_KEY_NAME_LEN 16
/* SSL_CTX_set_tlsext_ticket_key_cb sets the ticket callback to |callback| and
* returns one. |callback| will be called when encrypting a new ticket and when
* decrypting a ticket from the client.
*
* In both modes, |ctx| and |hmac_ctx| will already have been initialized with
* |EVP_CIPHER_CTX_init| and |HMAC_CTX_init|, respectively. |callback|
* configures |hmac_ctx| with an HMAC digest and key, and configures |ctx|
* for encryption or decryption, based on the mode.
*
* When encrypting a new ticket, |encrypt| will be one. It writes a public
* 16-byte key name to |key_name| and a fresh IV to |iv|. The output IV length
* must match |EVP_CIPHER_CTX_iv_length| of the cipher selected. In this mode,
* |callback| returns 1 on success and -1 on error.
*
* When decrypting a ticket, |encrypt| will be zero. |key_name| will point to a
* 16-byte key name and |iv| points to an IV. The length of the IV consumed must
* match |EVP_CIPHER_CTX_iv_length| of the cipher selected. In this mode,
* |callback| returns -1 to abort the handshake, 0 if decrypting the ticket
* failed, and 1 or 2 on success. If it returns 2, the ticket will be renewed.
* This may be used to re-key the ticket.
*
* WARNING: |callback| wildly breaks the usual return value convention and is
* called in two different modes. */
OPENSSL_EXPORT int SSL_CTX_set_tlsext_ticket_key_cb(
SSL_CTX *ctx, int (*callback)(SSL *ssl, uint8_t *key_name, uint8_t *iv,
EVP_CIPHER_CTX *ctx, HMAC_CTX *hmac_ctx,
int encrypt));
/* ssl_ticket_aead_result_t enumerates the possible results from decrypting a
* ticket with an |SSL_TICKET_AEAD_METHOD|. */
enum ssl_ticket_aead_result_t {
/* ssl_ticket_aead_success indicates that the ticket was successfully
* decrypted. */
ssl_ticket_aead_success,
/* ssl_ticket_aead_retry indicates that the operation could not be
* immediately completed and must be reattempted, via |open|, at a later
* point. */
ssl_ticket_aead_retry,
/* ssl_ticket_aead_ignore_ticket indicates that the ticket should be ignored
* (i.e. is corrupt or otherwise undecryptable). */
ssl_ticket_aead_ignore_ticket,
/* ssl_ticket_aead_error indicates that a fatal error occured and the
* handshake should be terminated. */
ssl_ticket_aead_error,
};
/* ssl_ticket_aead_method_st (aka |SSL_TICKET_ENCRYPTION_METHOD|) contains
* methods for encrypting and decrypting session tickets. */
struct ssl_ticket_aead_method_st {
/* max_overhead returns the maximum number of bytes of overhead that |seal|
* may add. */
size_t (*max_overhead)(SSL *ssl);
/* seal encrypts and authenticates |in_len| bytes from |in|, writes, at most,
* |max_out_len| bytes to |out|, and puts the number of bytes written in
* |*out_len|. The |in| and |out| buffers may be equal but will not otherwise
* alias. It returns one on success or zero on error. */
int (*seal)(SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out_len,
const uint8_t *in, size_t in_len);
/* open authenticates and decrypts |in_len| bytes from |in|, writes, at most,
* |max_out_len| bytes of plaintext to |out|, and puts the number of bytes
* written in |*out_len|. The |in| and |out| buffers may be equal but will
* not otherwise alias. See |ssl_ticket_aead_result_t| for details of the
* return values. In the case that a retry is indicated, the caller should
* arrange for the high-level operation on |ssl| to be retried when the
* operation is completed, which will result in another call to |open|. */
enum ssl_ticket_aead_result_t (*open)(SSL *ssl, uint8_t *out, size_t *out_len,
size_t max_out_len, const uint8_t *in,
size_t in_len);
};
/* SSL_CTX_set_ticket_aead_method configures a custom ticket AEAD method table
* on |ctx|. |aead_method| must remain valid for the lifetime of |ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_ticket_aead_method(
SSL_CTX *ctx, const SSL_TICKET_AEAD_METHOD *aead_method);
/* Elliptic curve Diffie-Hellman.
*
* Cipher suites using an ECDHE key exchange perform Diffie-Hellman over an
* elliptic curve negotiated by both endpoints. See RFC 4492. Only named curves
* are supported. ECDHE is always enabled, but the curve preferences may be
* configured with these functions.
*
* Note that TLS 1.3 renames these from curves to groups. For consistency, we
* currently use the TLS 1.2 name in the API. */
/* SSL_CTX_set1_curves sets the preferred curves for |ctx| to be |curves|. Each
* element of |curves| should be a curve nid. It returns one on success and
* zero on failure.
*
* Note that this API uses nid values from nid.h and not the |SSL_CURVE_*|
* values defined below. */
OPENSSL_EXPORT int SSL_CTX_set1_curves(SSL_CTX *ctx, const int *curves,
size_t curves_len);
/* SSL_set1_curves sets the preferred curves for |ssl| to be |curves|. Each
* element of |curves| should be a curve nid. It returns one on success and
* zero on failure.
*
* Note that this API uses nid values from nid.h and not the |SSL_CURVE_*|
* values defined below. */
OPENSSL_EXPORT int SSL_set1_curves(SSL *ssl, const int *curves,
size_t curves_len);
/* SSL_CTX_set1_curves_list sets the preferred curves for |ctx| to be the
* colon-separated list |curves|. Each element of |curves| should be a curve
* name (e.g. P-256, X25519, ...). It returns one on success and zero on
* failure. */
OPENSSL_EXPORT int SSL_CTX_set1_curves_list(SSL_CTX *ctx, const char *curves);
/* SSL_set1_curves_list sets the preferred curves for |ssl| to be the
* colon-separated list |curves|. Each element of |curves| should be a curve
* name (e.g. P-256, X25519, ...). It returns one on success and zero on
* failure. */
OPENSSL_EXPORT int SSL_set1_curves_list(SSL *ssl, const char *curves);
/* SSL_CURVE_* define TLS curve IDs. */
#define SSL_CURVE_SECP224R1 21
#define SSL_CURVE_SECP256R1 23
#define SSL_CURVE_SECP384R1 24
#define SSL_CURVE_SECP521R1 25
#define SSL_CURVE_X25519 29
/* SSL_get_curve_id returns the ID of the curve used by |ssl|'s most recently
* completed handshake or 0 if not applicable.
*
* TODO(davidben): This API currently does not work correctly if there is a
* renegotiation in progress. Fix this. */
OPENSSL_EXPORT uint16_t SSL_get_curve_id(const SSL *ssl);
/* SSL_get_curve_name returns a human-readable name for the curve specified by
* the given TLS curve id, or NULL if the curve is unknown. */
OPENSSL_EXPORT const char *SSL_get_curve_name(uint16_t curve_id);
/* Certificate verification.
*
* SSL may authenticate either endpoint with an X.509 certificate. Typically
* this is used to authenticate the server to the client. These functions
* configure certificate verification.
*
* WARNING: By default, certificate verification errors on a client are not
* fatal. See |SSL_VERIFY_NONE| This may be configured with
* |SSL_CTX_set_verify|.
*
* By default clients are anonymous but a server may request a certificate from
* the client by setting |SSL_VERIFY_PEER|.
*
* Many of these functions use OpenSSL's legacy X.509 stack which is
* underdocumented and deprecated, but the replacement isn't ready yet. For
* now, consumers may use the existing stack or bypass it by performing
* certificate verification externally. This may be done with
* |SSL_CTX_set_cert_verify_callback| or by extracting the chain with
* |SSL_get_peer_cert_chain| after the handshake. In the future, functions will
* be added to use the SSL stack without dependency on any part of the legacy
* X.509 and ASN.1 stack.
*
* To augment certificate verification, a client may also enable OCSP stapling
* (RFC 6066) and Certificate Transparency (RFC 6962) extensions. */
/* SSL_VERIFY_NONE, on a client, verifies the server certificate but does not
* make errors fatal. The result may be checked with |SSL_get_verify_result|. On
* a server it does not request a client certificate. This is the default. */
#define SSL_VERIFY_NONE 0x00
/* SSL_VERIFY_PEER, on a client, makes server certificate errors fatal. On a
* server it requests a client certificate and makes errors fatal. However,
* anonymous clients are still allowed. See
* |SSL_VERIFY_FAIL_IF_NO_PEER_CERT|. */
#define SSL_VERIFY_PEER 0x01
/* SSL_VERIFY_FAIL_IF_NO_PEER_CERT configures a server to reject connections if
* the client declines to send a certificate. This flag must be used together
* with |SSL_VERIFY_PEER|, otherwise it won't work. */
#define SSL_VERIFY_FAIL_IF_NO_PEER_CERT 0x02
/* SSL_VERIFY_PEER_IF_NO_OBC configures a server to request a client certificate
* if and only if Channel ID is not negotiated. */
#define SSL_VERIFY_PEER_IF_NO_OBC 0x04
/* SSL_CTX_set_verify configures certificate verification behavior. |mode| is
* one of the |SSL_VERIFY_*| values defined above. |callback|, if not NULL, is
* used to customize certificate verification. See the behavior of
* |X509_STORE_CTX_set_verify_cb|.
*
* The callback may use |SSL_get_ex_data_X509_STORE_CTX_idx| with
* |X509_STORE_CTX_get_ex_data| to look up the |SSL| from |store_ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_verify(
SSL_CTX *ctx, int mode, int (*callback)(int ok, X509_STORE_CTX *store_ctx));
/* SSL_set_verify configures certificate verification behavior. |mode| is one of
* the |SSL_VERIFY_*| values defined above. |callback|, if not NULL, is used to
* customize certificate verification. See the behavior of
* |X509_STORE_CTX_set_verify_cb|.
*
* The callback may use |SSL_get_ex_data_X509_STORE_CTX_idx| with
* |X509_STORE_CTX_get_ex_data| to look up the |SSL| from |store_ctx|. */
OPENSSL_EXPORT void SSL_set_verify(SSL *ssl, int mode,
int (*callback)(int ok,
X509_STORE_CTX *store_ctx));
/* SSL_CTX_get_verify_mode returns |ctx|'s verify mode, set by
* |SSL_CTX_set_verify|. */
OPENSSL_EXPORT int SSL_CTX_get_verify_mode(const SSL_CTX *ctx);
/* SSL_get_verify_mode returns |ssl|'s verify mode, set by |SSL_CTX_set_verify|
* or |SSL_set_verify|. */
OPENSSL_EXPORT int SSL_get_verify_mode(const SSL *ssl);
/* SSL_CTX_get_verify_callback returns the callback set by
* |SSL_CTX_set_verify|. */
OPENSSL_EXPORT int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(
int ok, X509_STORE_CTX *store_ctx);
/* SSL_get_verify_callback returns the callback set by |SSL_CTX_set_verify| or
* |SSL_set_verify|. */
OPENSSL_EXPORT int (*SSL_get_verify_callback(const SSL *ssl))(
int ok, X509_STORE_CTX *store_ctx);
/* SSL_CTX_set_verify_depth sets the maximum depth of a certificate chain
* accepted in verification. This number does not include the leaf, so a depth
* of 1 allows the leaf and one CA certificate. */
OPENSSL_EXPORT void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth);
/* SSL_set_verify_depth sets the maximum depth of a certificate chain accepted
* in verification. This number does not include the leaf, so a depth of 1
* allows the leaf and one CA certificate. */
OPENSSL_EXPORT void SSL_set_verify_depth(SSL *ssl, int depth);
/* SSL_CTX_get_verify_depth returns the maximum depth of a certificate accepted
* in verification. */
OPENSSL_EXPORT int SSL_CTX_get_verify_depth(const SSL_CTX *ctx);
/* SSL_get_verify_depth returns the maximum depth of a certificate accepted in
* verification. */
OPENSSL_EXPORT int SSL_get_verify_depth(const SSL *ssl);
/* SSL_CTX_set1_param sets verification parameters from |param|. It returns one
* on success and zero on failure. The caller retains ownership of |param|. */
OPENSSL_EXPORT int SSL_CTX_set1_param(SSL_CTX *ctx,
const X509_VERIFY_PARAM *param);
/* SSL_set1_param sets verification parameters from |param|. It returns one on
* success and zero on failure. The caller retains ownership of |param|. */
OPENSSL_EXPORT int SSL_set1_param(SSL *ssl,
const X509_VERIFY_PARAM *param);
/* SSL_CTX_get0_param returns |ctx|'s |X509_VERIFY_PARAM| for certificate
* verification. The caller must not release the returned pointer but may call
* functions on it to configure it. */
OPENSSL_EXPORT X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx);
/* SSL_get0_param returns |ssl|'s |X509_VERIFY_PARAM| for certificate
* verification. The caller must not release the returned pointer but may call
* functions on it to configure it. */
OPENSSL_EXPORT X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl);
/* SSL_CTX_set_purpose sets |ctx|'s |X509_VERIFY_PARAM|'s 'purpose' parameter to
* |purpose|. It returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_CTX_set_purpose(SSL_CTX *ctx, int purpose);
/* SSL_set_purpose sets |ssl|'s |X509_VERIFY_PARAM|'s 'purpose' parameter to
* |purpose|. It returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_set_purpose(SSL *ssl, int purpose);
/* SSL_CTX_set_trust sets |ctx|'s |X509_VERIFY_PARAM|'s 'trust' parameter to
* |trust|. It returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_CTX_set_trust(SSL_CTX *ctx, int trust);
/* SSL_set_trust sets |ssl|'s |X509_VERIFY_PARAM|'s 'trust' parameter to
* |trust|. It returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_set_trust(SSL *ssl, int trust);
/* SSL_CTX_set_cert_store sets |ctx|'s certificate store to |store|. It takes
* ownership of |store|. The store is used for certificate verification.
*
* The store is also used for the auto-chaining feature, but this is deprecated.
* See also |SSL_MODE_NO_AUTO_CHAIN|. */
OPENSSL_EXPORT void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store);
/* SSL_CTX_get_cert_store returns |ctx|'s certificate store. */
OPENSSL_EXPORT X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx);
/* SSL_CTX_set_default_verify_paths loads the OpenSSL system-default trust
* anchors into |ctx|'s store. It returns one on success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx);
/* SSL_CTX_load_verify_locations loads trust anchors into |ctx|'s store from
* |ca_file| and |ca_dir|, either of which may be NULL. If |ca_file| is passed,
* it is opened and PEM-encoded CA certificates are read. If |ca_dir| is passed,
* it is treated as a directory in OpenSSL's hashed directory format. It returns
* one on success and zero on failure.
*
* See
* https://www.openssl.org/docs/manmaster/ssl/SSL_CTX_load_verify_locations.html
* for documentation on the directory format. */
OPENSSL_EXPORT int SSL_CTX_load_verify_locations(SSL_CTX *ctx,
const char *ca_file,
const char *ca_dir);
/* SSL_get_verify_result returns the result of certificate verification. It is
* either |X509_V_OK| or a |X509_V_ERR_*| value. */
OPENSSL_EXPORT long SSL_get_verify_result(const SSL *ssl);
/* SSL_get_ex_data_X509_STORE_CTX_idx returns the ex_data index used to look up
* the |SSL| associated with an |X509_STORE_CTX| in the verify callback. */
OPENSSL_EXPORT int SSL_get_ex_data_X509_STORE_CTX_idx(void);
/* SSL_CTX_set_cert_verify_callback sets a custom callback to be called on
* certificate verification rather than |X509_verify_cert|. |store_ctx| contains
* the verification parameters. The callback should return one on success and
* zero on fatal error. It may use |X509_STORE_CTX_set_error| to set a
* verification result.
*
* The callback may use |SSL_get_ex_data_X509_STORE_CTX_idx| to recover the
* |SSL| object from |store_ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_cert_verify_callback(
SSL_CTX *ctx, int (*callback)(X509_STORE_CTX *store_ctx, void *arg),
void *arg);
/* SSL_CTX_i_promise_to_verify_certs_after_the_handshake indicates that the
* caller understands that the |CRYPTO_BUFFER|-based methods currently require
* post-handshake verification of certificates and thus it's ok to accept any
* certificates during the handshake. */
OPENSSL_EXPORT void SSL_CTX_i_promise_to_verify_certs_after_the_handshake(
SSL_CTX *ctx);
/* SSL_enable_signed_cert_timestamps causes |ssl| (which must be the client end
* of a connection) to request SCTs from the server. See
* https://tools.ietf.org/html/rfc6962.
*
* Call |SSL_get0_signed_cert_timestamp_list| to recover the SCT after the
* handshake. */
OPENSSL_EXPORT void SSL_enable_signed_cert_timestamps(SSL *ssl);
/* SSL_CTX_enable_signed_cert_timestamps enables SCT requests on all client SSL
* objects created from |ctx|.
*
* Call |SSL_get0_signed_cert_timestamp_list| to recover the SCT after the
* handshake. */
OPENSSL_EXPORT void SSL_CTX_enable_signed_cert_timestamps(SSL_CTX *ctx);
/* SSL_enable_ocsp_stapling causes |ssl| (which must be the client end of a
* connection) to request a stapled OCSP response from the server.
*
* Call |SSL_get0_ocsp_response| to recover the OCSP response after the
* handshake. */
OPENSSL_EXPORT void SSL_enable_ocsp_stapling(SSL *ssl);
/* SSL_CTX_enable_ocsp_stapling enables OCSP stapling on all client SSL objects
* created from |ctx|.
*
* Call |SSL_get0_ocsp_response| to recover the OCSP response after the
* handshake. */
OPENSSL_EXPORT void SSL_CTX_enable_ocsp_stapling(SSL_CTX *ctx);
/* SSL_CTX_set0_verify_cert_store sets an |X509_STORE| that will be used
* exclusively for certificate verification and returns one. Ownership of
* |store| is transferred to the |SSL_CTX|. */
OPENSSL_EXPORT int SSL_CTX_set0_verify_cert_store(SSL_CTX *ctx,
X509_STORE *store);
/* SSL_CTX_set1_verify_cert_store sets an |X509_STORE| that will be used
* exclusively for certificate verification and returns one. An additional
* reference to |store| will be taken. */
OPENSSL_EXPORT int SSL_CTX_set1_verify_cert_store(SSL_CTX *ctx,
X509_STORE *store);
/* SSL_set0_verify_cert_store sets an |X509_STORE| that will be used
* exclusively for certificate verification and returns one. Ownership of
* |store| is transferred to the |SSL|. */
OPENSSL_EXPORT int SSL_set0_verify_cert_store(SSL *ssl, X509_STORE *store);
/* SSL_set1_verify_cert_store sets an |X509_STORE| that will be used
* exclusively for certificate verification and returns one. An additional
* reference to |store| will be taken. */
OPENSSL_EXPORT int SSL_set1_verify_cert_store(SSL *ssl, X509_STORE *store);
/* SSL_CTX_set_ed25519_enabled configures whether |ctx| advertises support for
* the Ed25519 signature algorithm when using the default preference list. */
OPENSSL_EXPORT void SSL_CTX_set_ed25519_enabled(SSL_CTX *ctx, int enabled);
/* SSL_CTX_set_verify_algorithm_prefs confingures |ctx| to use |prefs| as the
* preference list when verifying signature's from the peer's long-term key. It
* returns one on zero on error. |prefs| should not include the internal-only
* value |SSL_SIGN_RSA_PKCS1_MD5_SHA1|. */
OPENSSL_EXPORT int SSL_CTX_set_verify_algorithm_prefs(SSL_CTX *ctx,
const uint16_t *prefs,
size_t num_prefs);
/* Client certificate CA list.
*
* When requesting a client certificate, a server may advertise a list of
* certificate authorities which are accepted. These functions may be used to
* configure this list. */
/* SSL_set_client_CA_list sets |ssl|'s client certificate CA list to
* |name_list|. It takes ownership of |name_list|. */
OPENSSL_EXPORT void SSL_set_client_CA_list(SSL *ssl,
STACK_OF(X509_NAME) *name_list);
/* SSL_CTX_set_client_CA_list sets |ctx|'s client certificate CA list to
* |name_list|. It takes ownership of |name_list|. */
OPENSSL_EXPORT void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,
STACK_OF(X509_NAME) *name_list);
/* SSL_get_client_CA_list returns |ssl|'s client certificate CA list. If |ssl|
* has not been configured as a client, this is the list configured by
* |SSL_CTX_set_client_CA_list|.
*
* If configured as a client, it returns the client certificate CA list sent by
* the server. In this mode, the behavior is undefined except during the
* callbacks set by |SSL_CTX_set_cert_cb| and |SSL_CTX_set_client_cert_cb| or
* when the handshake is paused because of them. */
OPENSSL_EXPORT STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *ssl);
/* SSL_get0_server_requested_CAs returns the CAs sent by a server to guide a
* client in certificate selection. They are a series of DER-encoded X.509
* names. This function may only be called during a callback set by
* |SSL_CTX_set_cert_cb| or when the handshake is paused because of it.
*
* The returned stack is owned by |ssl|, as are its contents. It should not be
* used past the point where the handshake is restarted after the callback. */
OPENSSL_EXPORT STACK_OF(CRYPTO_BUFFER) *SSL_get0_server_requested_CAs(
const SSL *ssl);
/* SSL_CTX_get_client_CA_list returns |ctx|'s client certificate CA list. */
OPENSSL_EXPORT STACK_OF(X509_NAME) *
SSL_CTX_get_client_CA_list(const SSL_CTX *ctx);
/* SSL_add_client_CA appends |x509|'s subject to the client certificate CA list.
* It returns one on success or zero on error. The caller retains ownership of
* |x509|. */
OPENSSL_EXPORT int SSL_add_client_CA(SSL *ssl, X509 *x509);
/* SSL_CTX_add_client_CA appends |x509|'s subject to the client certificate CA
* list. It returns one on success or zero on error. The caller retains
* ownership of |x509|. */
OPENSSL_EXPORT int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x509);
/* SSL_load_client_CA_file opens |file| and reads PEM-encoded certificates from
* it. It returns a newly-allocated stack of the certificate subjects or NULL
* on error. */
OPENSSL_EXPORT STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
/* SSL_dup_CA_list makes a deep copy of |list|. It returns the new list on
* success or NULL on allocation error. */
OPENSSL_EXPORT STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *list);
/* SSL_add_file_cert_subjects_to_stack behaves like |SSL_load_client_CA_file|
* but appends the result to |out|. It returns one on success or zero on
* error. */
OPENSSL_EXPORT int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *out,
const char *file);
/* Server name indication.
*
* The server_name extension (RFC 3546) allows the client to advertise the name
* of the server it is connecting to. This is used in virtual hosting
* deployments to select one of a several certificates on a single IP. Only the
* host_name name type is supported. */
#define TLSEXT_NAMETYPE_host_name 0
/* SSL_set_tlsext_host_name, for a client, configures |ssl| to advertise |name|
* in the server_name extension. It returns one on success and zero on error. */
OPENSSL_EXPORT int SSL_set_tlsext_host_name(SSL *ssl, const char *name);
/* SSL_get_servername, for a server, returns the hostname supplied by the
* client or NULL if there was none. The |type| argument must be
* |TLSEXT_NAMETYPE_host_name|. */
OPENSSL_EXPORT const char *SSL_get_servername(const SSL *ssl, const int type);
/* SSL_get_servername_type, for a server, returns |TLSEXT_NAMETYPE_host_name|
* if the client sent a hostname and -1 otherwise. */
OPENSSL_EXPORT int SSL_get_servername_type(const SSL *ssl);
/* SSL_CTX_set_tlsext_servername_callback configures |callback| to be called on
* the server after ClientHello extensions have been parsed and returns one.
* The callback may use |SSL_get_servername| to examine the server_name
* extension and returns a |SSL_TLSEXT_ERR_*| value. The value of |arg| may be
* set by calling |SSL_CTX_set_tlsext_servername_arg|.
*
* If the callback returns |SSL_TLSEXT_ERR_NOACK|, the server_name extension is
* not acknowledged in the ServerHello. If the return value is
* |SSL_TLSEXT_ERR_ALERT_FATAL|, then |*out_alert| is the alert to send,
* defaulting to |SSL_AD_UNRECOGNIZED_NAME|. |SSL_TLSEXT_ERR_ALERT_WARNING| is
* ignored and treated as |SSL_TLSEXT_ERR_OK|. */
OPENSSL_EXPORT int SSL_CTX_set_tlsext_servername_callback(
SSL_CTX *ctx, int (*callback)(SSL *ssl, int *out_alert, void *arg));
/* SSL_CTX_set_tlsext_servername_arg sets the argument to the servername
* callback and returns one. See |SSL_CTX_set_tlsext_servername_callback|. */
OPENSSL_EXPORT int SSL_CTX_set_tlsext_servername_arg(SSL_CTX *ctx, void *arg);
/* SSL_TLSEXT_ERR_* are values returned by some extension-related callbacks. */
#define SSL_TLSEXT_ERR_OK 0
#define SSL_TLSEXT_ERR_ALERT_WARNING 1
#define SSL_TLSEXT_ERR_ALERT_FATAL 2
#define SSL_TLSEXT_ERR_NOACK 3
/* SSL_set_SSL_CTX changes |ssl|'s |SSL_CTX|. |ssl| will use the
* certificate-related settings from |ctx|, and |SSL_get_SSL_CTX| will report
* |ctx|. This function may be used during the callbacks registered by
* |SSL_CTX_set_select_certificate_cb|,
* |SSL_CTX_set_tlsext_servername_callback|, and |SSL_CTX_set_cert_cb| or when
* the handshake is paused from them. It is typically used to switch
* certificates based on SNI.
*
* Note the session cache and related settings will continue to use the initial
* |SSL_CTX|. Callers should use |SSL_CTX_set_session_id_context| to partition
* the session cache between different domains.
*
* TODO(davidben): Should other settings change after this call? */
OPENSSL_EXPORT SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx);
/* Application-layer protocol negotiation.
*
* The ALPN extension (RFC 7301) allows negotiating different application-layer
* protocols over a single port. This is used, for example, to negotiate
* HTTP/2. */
/* SSL_CTX_set_alpn_protos sets the client ALPN protocol list on |ctx| to
* |protos|. |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
* length-prefixed strings). It returns zero on success and one on failure.
* Configuring this list enables ALPN on a client.
*
* WARNING: this function is dangerous because it breaks the usual return value
* convention. */
OPENSSL_EXPORT int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const uint8_t *protos,
unsigned protos_len);
/* SSL_set_alpn_protos sets the client ALPN protocol list on |ssl| to |protos|.
* |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
* length-prefixed strings). It returns zero on success and one on failure.
* Configuring this list enables ALPN on a client.
*
* WARNING: this function is dangerous because it breaks the usual return value
* convention. */
OPENSSL_EXPORT int SSL_set_alpn_protos(SSL *ssl, const uint8_t *protos,
unsigned protos_len);
/* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
* during ClientHello processing in order to select an ALPN protocol from the
* client's list of offered protocols. Configuring this callback enables ALPN on
* a server.
*
* The callback is passed a wire-format (i.e. a series of non-empty, 8-bit
* length-prefixed strings) ALPN protocol list in |in|. It should set |*out| and
* |*out_len| to the selected protocol and return |SSL_TLSEXT_ERR_OK| on
* success. It does not pass ownership of the buffer. Otherwise, it should
* return |SSL_TLSEXT_ERR_NOACK|. Other |SSL_TLSEXT_ERR_*| values are
* unimplemented and will be treated as |SSL_TLSEXT_ERR_NOACK|.
*
* The cipher suite is selected before negotiating ALPN. The callback may use
* |SSL_get_pending_cipher| to query the cipher suite. */
OPENSSL_EXPORT void SSL_CTX_set_alpn_select_cb(
SSL_CTX *ctx, int (*cb)(SSL *ssl, const uint8_t **out, uint8_t *out_len,
const uint8_t *in, unsigned in_len, void *arg),
void *arg);
/* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
* On return it sets |*out_data| to point to |*out_len| bytes of protocol name
* (not including the leading length-prefix byte). If the server didn't respond
* with a negotiated protocol then |*out_len| will be zero. */
OPENSSL_EXPORT void SSL_get0_alpn_selected(const SSL *ssl,
const uint8_t **out_data,
unsigned *out_len);
/* SSL_CTX_set_allow_unknown_alpn_protos configures client connections on |ctx|
* to allow unknown ALPN protocols from the server. Otherwise, by default, the
* client will require that the protocol be advertised in
* |SSL_CTX_set_alpn_protos|. */
OPENSSL_EXPORT void SSL_CTX_set_allow_unknown_alpn_protos(SSL_CTX *ctx,
int enabled);
/* Next protocol negotiation.
*
* The NPN extension (draft-agl-tls-nextprotoneg-03) is the predecessor to ALPN
* and deprecated in favor of it. */
/* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
* TLS server needs a list of supported protocols for Next Protocol
* Negotiation. The returned list must be in wire format. The list is returned
* by setting |*out| to point to it and |*out_len| to its length. This memory
* will not be modified, but one should assume that |ssl| keeps a reference to
* it.
*
* The callback should return |SSL_TLSEXT_ERR_OK| if it wishes to advertise.
* Otherwise, no such extension will be included in the ServerHello. */
OPENSSL_EXPORT void SSL_CTX_set_next_protos_advertised_cb(
SSL_CTX *ctx,
int (*cb)(SSL *ssl, const uint8_t **out, unsigned *out_len, void *arg),
void *arg);
/* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a client
* needs to select a protocol from the server's provided list. |*out| must be
* set to point to the selected protocol (which may be within |in|). The length
* of the protocol name must be written into |*out_len|. The server's advertised
* protocols are provided in |in| and |in_len|. The callback can assume that
* |in| is syntactically valid.
*
* The client must select a protocol. It is fatal to the connection if this
* callback returns a value other than |SSL_TLSEXT_ERR_OK|.
*
* Configuring this callback enables NPN on a client. */
OPENSSL_EXPORT void SSL_CTX_set_next_proto_select_cb(
SSL_CTX *ctx, int (*cb)(SSL *ssl, uint8_t **out, uint8_t *out_len,
const uint8_t *in, unsigned in_len, void *arg),
void *arg);
/* SSL_get0_next_proto_negotiated sets |*out_data| and |*out_len| to point to
* the client's requested protocol for this connection. If the client didn't
* request any protocol, then |*out_data| is set to NULL.
*
* Note that the client can request any protocol it chooses. The value returned
* from this function need not be a member of the list of supported protocols
* provided by the server. */
OPENSSL_EXPORT void SSL_get0_next_proto_negotiated(const SSL *ssl,
const uint8_t **out_data,
unsigned *out_len);
/* SSL_select_next_proto implements the standard protocol selection. It is
* expected that this function is called from the callback set by
* |SSL_CTX_set_next_proto_select_cb|.
*
* |peer| and |supported| must be vectors of 8-bit, length-prefixed byte strings
* containing the peer and locally-configured protocols, respectively. The
* length byte itself is not included in the length. A byte string of length 0
* is invalid. No byte string may be truncated. |supported| is assumed to be
* non-empty.
*
* This function finds the first protocol in |peer| which is also in
* |supported|. If one was found, it sets |*out| and |*out_len| to point to it
* and returns |OPENSSL_NPN_NEGOTIATED|. Otherwise, it returns
* |OPENSSL_NPN_NO_OVERLAP| and sets |*out| and |*out_len| to the first
* supported protocol. */
OPENSSL_EXPORT int SSL_select_next_proto(uint8_t **out, uint8_t *out_len,
const uint8_t *peer, unsigned peer_len,
const uint8_t *supported,
unsigned supported_len);
#define OPENSSL_NPN_UNSUPPORTED 0
#define OPENSSL_NPN_NEGOTIATED 1
#define OPENSSL_NPN_NO_OVERLAP 2
/* Channel ID.
*
* See draft-balfanz-tls-channelid-01. */
/* SSL_CTX_set_tls_channel_id_enabled configures whether connections associated
* with |ctx| should enable Channel ID. */
OPENSSL_EXPORT void SSL_CTX_set_tls_channel_id_enabled(SSL_CTX *ctx,
int enabled);
/* SSL_set_tls_channel_id_enabled configures whether |ssl| should enable Channel
* ID. */
OPENSSL_EXPORT void SSL_set_tls_channel_id_enabled(SSL *ssl, int enabled);
/* SSL_CTX_set1_tls_channel_id configures a TLS client to send a TLS Channel ID
* to compatible servers. |private_key| must be a P-256 EC key. It returns one
* on success and zero on error. */
OPENSSL_EXPORT int SSL_CTX_set1_tls_channel_id(SSL_CTX *ctx,
EVP_PKEY *private_key);
/* SSL_set1_tls_channel_id configures a TLS client to send a TLS Channel ID to
* compatible servers. |private_key| must be a P-256 EC key. It returns one on
* success and zero on error. */
OPENSSL_EXPORT int SSL_set1_tls_channel_id(SSL *ssl, EVP_PKEY *private_key);
/* SSL_get_tls_channel_id gets the client's TLS Channel ID from a server |SSL*|
* and copies up to the first |max_out| bytes into |out|. The Channel ID
* consists of the client's P-256 public key as an (x,y) pair where each is a
* 32-byte, big-endian field element. It returns 0 if the client didn't offer a
* Channel ID and the length of the complete Channel ID otherwise. */
OPENSSL_EXPORT size_t SSL_get_tls_channel_id(SSL *ssl, uint8_t *out,
size_t max_out);
/* SSL_CTX_set_channel_id_cb sets a callback to be called when a TLS Channel ID
* is requested. The callback may set |*out_pkey| to a key, passing a reference
* to the caller. If none is returned, the handshake will pause and
* |SSL_get_error| will return |SSL_ERROR_WANT_CHANNEL_ID_LOOKUP|.
*
* See also |SSL_ERROR_WANT_CHANNEL_ID_LOOKUP|. */
OPENSSL_EXPORT void SSL_CTX_set_channel_id_cb(
SSL_CTX *ctx, void (*channel_id_cb)(SSL *ssl, EVP_PKEY **out_pkey));
/* SSL_CTX_get_channel_id_cb returns the callback set by
* |SSL_CTX_set_channel_id_cb|. */
OPENSSL_EXPORT void (*SSL_CTX_get_channel_id_cb(SSL_CTX *ctx))(
SSL *ssl, EVP_PKEY **out_pkey);
/* DTLS-SRTP.
*
* See RFC 5764. */
/* srtp_protection_profile_st (aka |SRTP_PROTECTION_PROFILE|) is an SRTP
* profile for use with the use_srtp extension. */
struct srtp_protection_profile_st {
const char *name;
unsigned long id;
} /* SRTP_PROTECTION_PROFILE */;
DEFINE_CONST_STACK_OF(SRTP_PROTECTION_PROFILE)
/* SRTP_* define constants for SRTP profiles. */
#define SRTP_AES128_CM_SHA1_80 0x0001
#define SRTP_AES128_CM_SHA1_32 0x0002
#define SRTP_AES128_F8_SHA1_80 0x0003
#define SRTP_AES128_F8_SHA1_32 0x0004
#define SRTP_NULL_SHA1_80 0x0005
#define SRTP_NULL_SHA1_32 0x0006
#define SRTP_AEAD_AES_128_GCM 0x0007
#define SRTP_AEAD_AES_256_GCM 0x0008
/* SSL_CTX_set_srtp_profiles enables SRTP for all SSL objects created from
* |ctx|. |profile| contains a colon-separated list of profile names. It returns
* one on success and zero on failure. */
OPENSSL_EXPORT int SSL_CTX_set_srtp_profiles(SSL_CTX *ctx,
const char *profiles);
/* SSL_set_srtp_profiles enables SRTP for |ssl|. |profile| contains a
* colon-separated list of profile names. It returns one on success and zero on
* failure. */
OPENSSL_EXPORT int SSL_set_srtp_profiles(SSL *ssl, const char *profiles);
/* SSL_get_srtp_profiles returns the SRTP profiles supported by |ssl|. */
OPENSSL_EXPORT STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(
SSL *ssl);
/* SSL_get_selected_srtp_profile returns the selected SRTP profile, or NULL if
* SRTP was not negotiated. */
OPENSSL_EXPORT const SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(
SSL *ssl);
/* Pre-shared keys.
*
* Connections may be configured with PSK (Pre-Shared Key) cipher suites. These
* authenticate using out-of-band pre-shared keys rather than certificates. See
* RFC 4279.
*
* This implementation uses NUL-terminated C strings for identities and identity
* hints, so values with a NUL character are not supported. (RFC 4279 does not
* specify the format of an identity.) */
/* PSK_MAX_IDENTITY_LEN is the maximum supported length of a PSK identity,
* excluding the NUL terminator. */
#define PSK_MAX_IDENTITY_LEN 128
/* PSK_MAX_PSK_LEN is the maximum supported length of a pre-shared key. */
#define PSK_MAX_PSK_LEN 256
/* SSL_CTX_set_psk_client_callback sets the callback to be called when PSK is
* negotiated on the client. This callback must be set to enable PSK cipher
* suites on the client.
*
* The callback is passed the identity hint in |hint| or NULL if none was
* provided. It should select a PSK identity and write the identity and the
* corresponding PSK to |identity| and |psk|, respectively. The identity is
* written as a NUL-terminated C string of length (excluding the NUL terminator)
* at most |max_identity_len|. The PSK's length must be at most |max_psk_len|.
* The callback returns the length of the PSK or 0 if no suitable identity was
* found. */
OPENSSL_EXPORT void SSL_CTX_set_psk_client_callback(
SSL_CTX *ctx,
unsigned (*psk_client_callback)(
SSL *ssl, const char *hint, char *identity,
unsigned max_identity_len, uint8_t *psk, unsigned max_psk_len));
/* SSL_set_psk_client_callback sets the callback to be called when PSK is
* negotiated on the client. This callback must be set to enable PSK cipher
* suites on the client. See also |SSL_CTX_set_psk_client_callback|. */
OPENSSL_EXPORT void SSL_set_psk_client_callback(
SSL *ssl, unsigned (*psk_client_callback)(SSL *ssl, const char *hint,
char *identity,
unsigned max_identity_len,
uint8_t *psk,
unsigned max_psk_len));
/* SSL_CTX_set_psk_server_callback sets the callback to be called when PSK is
* negotiated on the server. This callback must be set to enable PSK cipher
* suites on the server.
*
* The callback is passed the identity in |identity|. It should write a PSK of
* length at most |max_psk_len| to |psk| and return the number of bytes written
* or zero if the PSK identity is unknown. */
OPENSSL_EXPORT void SSL_CTX_set_psk_server_callback(
SSL_CTX *ctx,
unsigned (*psk_server_callback)(SSL *ssl, const char *identity,
uint8_t *psk,
unsigned max_psk_len));
/* SSL_set_psk_server_callback sets the callback to be called when PSK is
* negotiated on the server. This callback must be set to enable PSK cipher
* suites on the server. See also |SSL_CTX_set_psk_server_callback|. */
OPENSSL_EXPORT void SSL_set_psk_server_callback(
SSL *ssl,
unsigned (*psk_server_callback)(SSL *ssl, const char *identity,
uint8_t *psk,
unsigned max_psk_len));
/* SSL_CTX_use_psk_identity_hint configures server connections to advertise an
* identity hint of |identity_hint|. It returns one on success and zero on
* error. */
OPENSSL_EXPORT int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx,
const char *identity_hint);
/* SSL_use_psk_identity_hint configures server connections to advertise an
* identity hint of |identity_hint|. It returns one on success and zero on
* error. */
OPENSSL_EXPORT int SSL_use_psk_identity_hint(SSL *ssl,
const char *identity_hint);
/* SSL_get_psk_identity_hint returns the PSK identity hint advertised for |ssl|
* or NULL if there is none. */
OPENSSL_EXPORT const char *SSL_get_psk_identity_hint(const SSL *ssl);
/* SSL_get_psk_identity, after the handshake completes, returns the PSK identity
* that was negotiated by |ssl| or NULL if PSK was not used. */
OPENSSL_EXPORT const char *SSL_get_psk_identity(const SSL *ssl);
/* Early data.
*
* WARNING: 0-RTT support in BoringSSL is currently experimental and not fully
* implemented. It may cause interoperability or security failures when used.
*
* Early data, or 0-RTT, is a feature in TLS 1.3 which allows clients to send
* data on the first flight during a resumption handshake. This can save a
* round-trip in some application protocols.
*
* WARNING: A 0-RTT handshake has different security properties from normal
* handshake, so it is off by default unless opted in. In particular, early data
* is replayable by a network attacker. Callers must account for this when
* sending or processing data before the handshake is confirmed. See
* draft-ietf-tls-tls13-18 for more information.
*
* As a server, if early data is accepted, |SSL_do_handshake| will complete as
* soon as the ClientHello is processed and server flight sent. |SSL_write| may
* be used to send half-RTT data. |SSL_read| will consume early data and
* transition to 1-RTT data as appropriate. Prior to the transition,
* |SSL_in_init| will report the handshake is still in progress. Callers may use
* it or |SSL_in_early_data| to defer or reject requests as needed.
*
* Early data as a client is more complex. If the offered session (see
* |SSL_set_session|) is 0-RTT-capable, the handshake will return after sending
* the ClientHello. The predicted peer certificate and ALPN protocol will be
* available via the usual APIs. |SSL_write| will write early data, up to the
* session's limit. Writes past this limit and |SSL_read| will complete the
* handshake before continuing. Callers may also call |SSL_do_handshake| again
* to complete the handshake sooner.
*
* If the server accepts early data, the handshake will succeed. |SSL_read| and
* |SSL_write| will then act as in a 1-RTT handshake. The peer certificate and
* ALPN protocol will be as predicted and need not be re-queried.
*
* If the server rejects early data, |SSL_do_handshake| (and thus |SSL_read| and
* |SSL_write|) will then fail with |SSL_get_error| returning
* |SSL_ERROR_EARLY_DATA_REJECTED|. The caller should treat this as a connection
* error and most likely perform a high-level retry. Note the server may still
* have processed the early data due to attacker replays.
*
* To then continue the handshake on the original connection, use
* |SSL_reset_early_data_reject|. This allows a faster retry than making a fresh
* connection. |SSL_do_handshake| will the complete the full handshake as in a
* fresh connection. Once reset, the peer certificate, ALPN protocol, and other
* properties may change so the caller must query them again.
*
* Finally, to implement the fallback described in draft-ietf-tls-tls13-18
* appendix C.3, retry on a fresh connection without 0-RTT if the handshake
* fails with |SSL_R_WRONG_VERSION_ON_EARLY_DATA|. */
/* SSL_CTX_set_early_data_enabled sets whether early data is allowed to be used
* with resumptions using |ctx|. */
OPENSSL_EXPORT void SSL_CTX_set_early_data_enabled(SSL_CTX *ctx, int enabled);
/* SSL_set_early_data_enabled sets whether early data is allowed to be used
* with resumptions using |ssl|. See |SSL_CTX_set_early_data_enabled| for more
* information. */
OPENSSL_EXPORT void SSL_set_early_data_enabled(SSL *ssl, int enabled);
/* SSL_in_early_data returns one if |ssl| has a pending handshake that has
* progressed enough to send or receive early data. Clients may call |SSL_write|
* to send early data, but |SSL_read| will complete the handshake before
* accepting application data. Servers may call |SSL_read| to read early data
* and |SSL_write| to send half-RTT data. */
OPENSSL_EXPORT int SSL_in_early_data(const SSL *ssl);
/* SSL_early_data_accepted returns whether early data was accepted on the
* handshake performed by |ssl|. */
OPENSSL_EXPORT int SSL_early_data_accepted(const SSL *ssl);
/* SSL_reset_early_data_reject resets |ssl| after an early data reject. All
* 0-RTT state is discarded, including any pending |SSL_write| calls. The caller
* should treat |ssl| as a logically fresh connection, usually by driving the
* handshake to completion using |SSL_do_handshake|.
*
* It is an error to call this function on an |SSL| object that is not signaling
* |SSL_ERROR_EARLY_DATA_REJECTED|. */
OPENSSL_EXPORT void SSL_reset_early_data_reject(SSL *ssl);
/* Alerts.
*
* TLS and SSL 3.0 use alerts to signal error conditions. Alerts have a type
* (warning or fatal) and description. OpenSSL internally handles fatal alerts
* with dedicated error codes (see |SSL_AD_REASON_OFFSET|). Except for
* close_notify, warning alerts are silently ignored and may only be surfaced
* with |SSL_CTX_set_info_callback|. */
/* SSL_AD_REASON_OFFSET is the offset between error reasons and |SSL_AD_*|
* values. Any error code under |ERR_LIB_SSL| with an error reason above this
* value corresponds to an alert description. Consumers may add or subtract
* |SSL_AD_REASON_OFFSET| to convert between them.
*
* make_errors.go reserves error codes above 1000 for manually-assigned errors.
* This value must be kept in sync with reservedReasonCode in make_errors.h */
#define SSL_AD_REASON_OFFSET 1000
/* SSL_AD_* are alert descriptions for SSL 3.0 and TLS. */
#define SSL_AD_CLOSE_NOTIFY SSL3_AD_CLOSE_NOTIFY
#define SSL_AD_UNEXPECTED_MESSAGE SSL3_AD_UNEXPECTED_MESSAGE
#define SSL_AD_BAD_RECORD_MAC SSL3_AD_BAD_RECORD_MAC
#define SSL_AD_DECRYPTION_FAILED TLS1_AD_DECRYPTION_FAILED
#define SSL_AD_RECORD_OVERFLOW TLS1_AD_RECORD_OVERFLOW
#define SSL_AD_DECOMPRESSION_FAILURE SSL3_AD_DECOMPRESSION_FAILURE
#define SSL_AD_HANDSHAKE_FAILURE SSL3_AD_HANDSHAKE_FAILURE
#define SSL_AD_NO_CERTIFICATE SSL3_AD_NO_CERTIFICATE /* Not used in TLS */
#define SSL_AD_BAD_CERTIFICATE SSL3_AD_BAD_CERTIFICATE
#define SSL_AD_UNSUPPORTED_CERTIFICATE SSL3_AD_UNSUPPORTED_CERTIFICATE
#define SSL_AD_CERTIFICATE_REVOKED SSL3_AD_CERTIFICATE_REVOKED
#define SSL_AD_CERTIFICATE_EXPIRED SSL3_AD_CERTIFICATE_EXPIRED
#define SSL_AD_CERTIFICATE_UNKNOWN SSL3_AD_CERTIFICATE_UNKNOWN
#define SSL_AD_ILLEGAL_PARAMETER SSL3_AD_ILLEGAL_PARAMETER
#define SSL_AD_UNKNOWN_CA TLS1_AD_UNKNOWN_CA
#define SSL_AD_ACCESS_DENIED TLS1_AD_ACCESS_DENIED
#define SSL_AD_DECODE_ERROR TLS1_AD_DECODE_ERROR
#define SSL_AD_DECRYPT_ERROR TLS1_AD_DECRYPT_ERROR
#define SSL_AD_EXPORT_RESTRICTION TLS1_AD_EXPORT_RESTRICTION
#define SSL_AD_PROTOCOL_VERSION TLS1_AD_PROTOCOL_VERSION
#define SSL_AD_INSUFFICIENT_SECURITY TLS1_AD_INSUFFICIENT_SECURITY
#define SSL_AD_INTERNAL_ERROR TLS1_AD_INTERNAL_ERROR
#define SSL_AD_INAPPROPRIATE_FALLBACK SSL3_AD_INAPPROPRIATE_FALLBACK
#define SSL_AD_USER_CANCELLED TLS1_AD_USER_CANCELLED
#define SSL_AD_NO_RENEGOTIATION TLS1_AD_NO_RENEGOTIATION
#define SSL_AD_MISSING_EXTENSION TLS1_AD_MISSING_EXTENSION
#define SSL_AD_UNSUPPORTED_EXTENSION TLS1_AD_UNSUPPORTED_EXTENSION
#define SSL_AD_CERTIFICATE_UNOBTAINABLE TLS1_AD_CERTIFICATE_UNOBTAINABLE
#define SSL_AD_UNRECOGNIZED_NAME TLS1_AD_UNRECOGNIZED_NAME
#define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE \
TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
#define SSL_AD_BAD_CERTIFICATE_HASH_VALUE TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
#define SSL_AD_UNKNOWN_PSK_IDENTITY TLS1_AD_UNKNOWN_PSK_IDENTITY
#define SSL_AD_CERTIFICATE_REQUIRED TLS1_AD_CERTIFICATE_REQUIRED
/* SSL_alert_type_string_long returns a string description of |value| as an
* alert type (warning or fatal). */
OPENSSL_EXPORT const char *SSL_alert_type_string_long(int value);
/* SSL_alert_desc_string_long returns a string description of |value| as an
* alert description or "unknown" if unknown. */
OPENSSL_EXPORT const char *SSL_alert_desc_string_long(int value);
/* SSL_send_fatal_alert sends a fatal alert over |ssl| of the specified type,
* which should be one of the |SSL_AD_*| constants. It returns one on success
* and <= 0 on error. The caller should pass the return value into
* |SSL_get_error| to determine how to proceed. Once this function has been
* called, future calls to |SSL_write| will fail.
*
* If retrying a failed operation due to |SSL_ERROR_WANT_WRITE|, subsequent
* calls must use the same |alert| parameter. */
OPENSSL_EXPORT int SSL_send_fatal_alert(SSL *ssl, uint8_t alert);
/* ex_data functions.
*
* See |ex_data.h| for details. */
OPENSSL_EXPORT int SSL_set_ex_data(SSL *ssl, int idx, void *data);
OPENSSL_EXPORT void *SSL_get_ex_data(const SSL *ssl, int idx);
OPENSSL_EXPORT int SSL_get_ex_new_index(long argl, void *argp,
CRYPTO_EX_unused *unused,
CRYPTO_EX_dup *dup_unused,
CRYPTO_EX_free *free_func);
OPENSSL_EXPORT int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx,
void *data);
OPENSSL_EXPORT void *SSL_SESSION_get_ex_data(const SSL_SESSION *session,
int idx);
OPENSSL_EXPORT int SSL_SESSION_get_ex_new_index(long argl, void *argp,
CRYPTO_EX_unused *unused,
CRYPTO_EX_dup *dup_unused,
CRYPTO_EX_free *free_func);
OPENSSL_EXPORT int SSL_CTX_set_ex_data(SSL_CTX *ctx, int idx, void *data);
OPENSSL_EXPORT void *SSL_CTX_get_ex_data(const SSL_CTX *ctx, int idx);
OPENSSL_EXPORT int SSL_CTX_get_ex_new_index(long argl, void *argp,
CRYPTO_EX_unused *unused,
CRYPTO_EX_dup *dup_unused,
CRYPTO_EX_free *free_func);
/* Low-level record-layer state. */
/* SSL_get_ivs sets |*out_iv_len| to the length of the IVs for the ciphers
* underlying |ssl| and sets |*out_read_iv| and |*out_write_iv| to point to the
* current IVs for the read and write directions. This is only meaningful for
* connections with implicit IVs (i.e. CBC mode with SSLv3 or TLS 1.0).
*
* It returns one on success or zero on error. */
OPENSSL_EXPORT int SSL_get_ivs(const SSL *ssl, const uint8_t **out_read_iv,
const uint8_t **out_write_iv,
size_t *out_iv_len);
/* SSL_get_key_block_len returns the length of |ssl|'s key block. */
OPENSSL_EXPORT size_t SSL_get_key_block_len(const SSL *ssl);
/* SSL_generate_key_block generates |out_len| bytes of key material for |ssl|'s
* current connection state. */
OPENSSL_EXPORT int SSL_generate_key_block(const SSL *ssl, uint8_t *out,
size_t out_len);
/* SSL_get_read_sequence returns, in TLS, the expected sequence number of the
* next incoming record in the current epoch. In DTLS, it returns the maximum
* sequence number received in the current epoch and includes the epoch number
* in the two most significant bytes. */
OPENSSL_EXPORT uint64_t SSL_get_read_sequence(const SSL *ssl);
/* SSL_get_write_sequence returns the sequence number of the next outgoing
* record in the current epoch. In DTLS, it includes the epoch number in the
* two most significant bytes. */
OPENSSL_EXPORT uint64_t SSL_get_write_sequence(const SSL *ssl);
/* Obscure functions. */
/* SSL_get_structure_sizes returns the sizes of the SSL, SSL_CTX and
* SSL_SESSION structures so that a test can ensure that outside code agrees on
* these values. */
OPENSSL_EXPORT void SSL_get_structure_sizes(size_t *ssl_size,
size_t *ssl_ctx_size,
size_t *ssl_session_size);
/* SSL_CTX_set_msg_callback installs |cb| as the message callback for |ctx|.
* This callback will be called when sending or receiving low-level record
* headers, complete handshake messages, ChangeCipherSpec, and alerts.
* |write_p| is one for outgoing messages and zero for incoming messages.
*
* For each record header, |cb| is called with |version| = 0 and |content_type|
* = |SSL3_RT_HEADER|. The |len| bytes from |buf| contain the header. Note that
* this does not include the record body. If the record is sealed, the length
* in the header is the length of the ciphertext.
*
* For each handshake message, ChangeCipherSpec, and alert, |version| is the
* protocol version and |content_type| is the corresponding record type. The
* |len| bytes from |buf| contain the handshake message, one-byte
* ChangeCipherSpec body, and two-byte alert, respectively.
*
* For a V2ClientHello, |version| is |SSL2_VERSION|, |content_type| is zero, and
* the |len| bytes from |buf| contain the V2ClientHello structure. */
OPENSSL_EXPORT void SSL_CTX_set_msg_callback(
SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type,
const void *buf, size_t len, SSL *ssl, void *arg));
/* SSL_CTX_set_msg_callback_arg sets the |arg| parameter of the message
* callback. */
OPENSSL_EXPORT void SSL_CTX_set_msg_callback_arg(SSL_CTX *ctx, void *arg);
/* SSL_set_msg_callback installs |cb| as the message callback of |ssl|. See
* |SSL_CTX_set_msg_callback| for when this callback is called. */
OPENSSL_EXPORT void SSL_set_msg_callback(
SSL *ssl, void (*cb)(int write_p, int version, int content_type,
const void *buf, size_t len, SSL *ssl, void *arg));
/* SSL_set_msg_callback_arg sets the |arg| parameter of the message callback. */
OPENSSL_EXPORT void SSL_set_msg_callback_arg(SSL *ssl, void *arg);
/* SSL_CTX_set_keylog_callback configures a callback to log key material. This
* is intended for debugging use with tools like Wireshark. The |cb| function
* should log |line| followed by a newline, synchronizing with any concurrent
* access to the log.
*
* The format is described in
* https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format. */
OPENSSL_EXPORT void SSL_CTX_set_keylog_callback(
SSL_CTX *ctx, void (*cb)(const SSL *ssl, const char *line));
/* SSL_CTX_get_keylog_callback returns the callback configured by
* |SSL_CTX_set_keylog_callback|. */
OPENSSL_EXPORT void (*SSL_CTX_get_keylog_callback(const SSL_CTX *ctx))(
const SSL *ssl, const char *line);
/* SSL_CTX_set_current_time_cb configures a callback to retrieve the current
* time, which should be set in |*out_clock|. This can be used for testing
* purposes; for example, a callback can be configured that returns a time
* set explicitly by the test. */
OPENSSL_EXPORT void SSL_CTX_set_current_time_cb(
SSL_CTX *ctx, void (*cb)(const SSL *ssl, struct timeval *out_clock));
enum ssl_renegotiate_mode_t {
ssl_renegotiate_never = 0,
ssl_renegotiate_once,
ssl_renegotiate_freely,
ssl_renegotiate_ignore,
};
/* SSL_set_renegotiate_mode configures how |ssl|, a client, reacts to
* renegotiation attempts by a server. If |ssl| is a server, peer-initiated
* renegotiations are *always* rejected and this function does nothing.
*
* The renegotiation mode defaults to |ssl_renegotiate_never|, but may be set
* at any point in a connection's lifetime. Set it to |ssl_renegotiate_once| to
* allow one renegotiation, |ssl_renegotiate_freely| to allow all
* renegotiations or |ssl_renegotiate_ignore| to ignore HelloRequest messages.
* Note that ignoring HelloRequest messages may cause the connection to stall
* if the server waits for the renegotiation to complete.
*
* There is no support in BoringSSL for initiating renegotiations as a client
* or server. */
OPENSSL_EXPORT void SSL_set_renegotiate_mode(SSL *ssl,
enum ssl_renegotiate_mode_t mode);
/* SSL_renegotiate_pending returns one if |ssl| is in the middle of a
* renegotiation. */
OPENSSL_EXPORT int SSL_renegotiate_pending(SSL *ssl);
/* SSL_total_renegotiations returns the total number of renegotiation handshakes
* performed by |ssl|. This includes the pending renegotiation, if any. */
OPENSSL_EXPORT int SSL_total_renegotiations(const SSL *ssl);
/* SSL_MAX_CERT_LIST_DEFAULT is the default maximum length, in bytes, of a peer
* certificate chain. */
#define SSL_MAX_CERT_LIST_DEFAULT (1024 * 100)
/* SSL_CTX_get_max_cert_list returns the maximum length, in bytes, of a peer
* certificate chain accepted by |ctx|. */
OPENSSL_EXPORT size_t SSL_CTX_get_max_cert_list(const SSL_CTX *ctx);
/* SSL_CTX_set_max_cert_list sets the maximum length, in bytes, of a peer
* certificate chain to |max_cert_list|. This affects how much memory may be
* consumed during the handshake. */
OPENSSL_EXPORT void SSL_CTX_set_max_cert_list(SSL_CTX *ctx,
size_t max_cert_list);
/* SSL_get_max_cert_list returns the maximum length, in bytes, of a peer
* certificate chain accepted by |ssl|. */
OPENSSL_EXPORT size_t SSL_get_max_cert_list(const SSL *ssl);
/* SSL_set_max_cert_list sets the maximum length, in bytes, of a peer
* certificate chain to |max_cert_list|. This affects how much memory may be
* consumed during the handshake. */
OPENSSL_EXPORT void SSL_set_max_cert_list(SSL *ssl, size_t max_cert_list);
/* SSL_CTX_set_max_send_fragment sets the maximum length, in bytes, of records
* sent by |ctx|. Beyond this length, handshake messages and application data
* will be split into multiple records. It returns one on success or zero on
* error. */
OPENSSL_EXPORT int SSL_CTX_set_max_send_fragment(SSL_CTX *ctx,
size_t max_send_fragment);
/* SSL_set_max_send_fragment sets the maximum length, in bytes, of records sent
* by |ssl|. Beyond this length, handshake messages and application data will
* be split into multiple records. It returns one on success or zero on
* error. */
OPENSSL_EXPORT int SSL_set_max_send_fragment(SSL *ssl,
size_t max_send_fragment);
/* ssl_early_callback_ctx (aka |SSL_CLIENT_HELLO|) is passed to certain
* callbacks that are called very early on during the server handshake. At this
* point, much of the SSL* hasn't been filled out and only the ClientHello can
* be depended on. */
typedef struct ssl_early_callback_ctx {
SSL *ssl;
const uint8_t *client_hello;
size_t client_hello_len;
uint16_t version;
const uint8_t *random;
size_t random_len;
const uint8_t *session_id;
size_t session_id_len;
const uint8_t *cipher_suites;
size_t cipher_suites_len;
const uint8_t *compression_methods;
size_t compression_methods_len;
const uint8_t *extensions;
size_t extensions_len;
} SSL_CLIENT_HELLO;
/* ssl_select_cert_result_t enumerates the possible results from selecting a
* certificate with |select_certificate_cb|. */
enum ssl_select_cert_result_t {
/* ssl_select_cert_success indicates that the certificate selection was
* successful. */
ssl_select_cert_success = 1,
/* ssl_select_cert_retry indicates that the operation could not be
* immediately completed and must be reattempted at a later point. */
ssl_select_cert_retry = 0,
/* ssl_select_cert_error indicates that a fatal error occured and the
* handshake should be terminated. */
ssl_select_cert_error = -1,
};
/* SSL_early_callback_ctx_extension_get searches the extensions in
* |client_hello| for an extension of the given type. If not found, it returns
* zero. Otherwise it sets |out_data| to point to the extension contents (not
* including the type and length bytes), sets |out_len| to the length of the
* extension contents and returns one. */
OPENSSL_EXPORT int SSL_early_callback_ctx_extension_get(
const SSL_CLIENT_HELLO *client_hello, uint16_t extension_type,
const uint8_t **out_data, size_t *out_len);
/* SSL_CTX_set_select_certificate_cb sets a callback that is called before most
* ClientHello processing and before the decision whether to resume a session
* is made. The callback may inspect the ClientHello and configure the
* connection. See |ssl_select_cert_result_t| for details of the return values.
*
* In the case that a retry is indicated, |SSL_get_error| will return
* |SSL_ERROR_PENDING_CERTIFICATE| and the caller should arrange for the
* high-level operation on |ssl| to be retried at a later time, which will
* result in another call to |cb|.
*
* Note: The |SSL_CLIENT_HELLO| is only valid for the duration of the callback
* and is not valid while the handshake is paused. */
OPENSSL_EXPORT void SSL_CTX_set_select_certificate_cb(
SSL_CTX *ctx,
enum ssl_select_cert_result_t (*cb)(const SSL_CLIENT_HELLO *));
/* SSL_CTX_set_dos_protection_cb sets a callback that is called once the
* resumption decision for a ClientHello has been made. It can return one to
* allow the handshake to continue or zero to cause the handshake to abort. */
OPENSSL_EXPORT void SSL_CTX_set_dos_protection_cb(
SSL_CTX *ctx, int (*cb)(const SSL_CLIENT_HELLO *));
/* SSL_ST_* are possible values for |SSL_state| and the bitmasks that make them
* up. */
#define SSL_ST_CONNECT 0x1000
#define SSL_ST_ACCEPT 0x2000
#define SSL_ST_MASK 0x0FFF
#define SSL_ST_INIT (SSL_ST_CONNECT | SSL_ST_ACCEPT)
#define SSL_ST_OK 0x03
#define SSL_ST_RENEGOTIATE (0x04 | SSL_ST_INIT)
#define SSL_ST_TLS13 (0x05 | SSL_ST_INIT)
/* SSL_CB_* are possible values for the |type| parameter in the info
* callback and the bitmasks that make them up. */
#define SSL_CB_LOOP 0x01
#define SSL_CB_EXIT 0x02
#define SSL_CB_READ 0x04
#define SSL_CB_WRITE 0x08
#define SSL_CB_ALERT 0x4000
#define SSL_CB_READ_ALERT (SSL_CB_ALERT | SSL_CB_READ)
#define SSL_CB_WRITE_ALERT (SSL_CB_ALERT | SSL_CB_WRITE)
#define SSL_CB_ACCEPT_LOOP (SSL_ST_ACCEPT | SSL_CB_LOOP)
#define SSL_CB_ACCEPT_EXIT (SSL_ST_ACCEPT | SSL_CB_EXIT)
#define SSL_CB_CONNECT_LOOP (SSL_ST_CONNECT | SSL_CB_LOOP)
#define SSL_CB_CONNECT_EXIT (SSL_ST_CONNECT | SSL_CB_EXIT)
#define SSL_CB_HANDSHAKE_START 0x10
#define SSL_CB_HANDSHAKE_DONE 0x20
/* SSL_CTX_set_info_callback configures a callback to be run when various
* events occur during a connection's lifetime. The |type| argument determines
* the type of event and the meaning of the |value| argument. Callbacks must
* ignore unexpected |type| values.
*
* |SSL_CB_READ_ALERT| is signaled for each alert received, warning or fatal.
* The |value| argument is a 16-bit value where the alert level (either
* |SSL3_AL_WARNING| or |SSL3_AL_FATAL|) is in the most-significant eight bits
* and the alert type (one of |SSL_AD_*|) is in the least-significant eight.
*
* |SSL_CB_WRITE_ALERT| is signaled for each alert sent. The |value| argument
* is constructed as with |SSL_CB_READ_ALERT|.
*
* |SSL_CB_HANDSHAKE_START| is signaled when a handshake begins. The |value|
* argument is always one.
*
* |SSL_CB_HANDSHAKE_DONE| is signaled when a handshake completes successfully.
* The |value| argument is always one. If a handshake False Starts, this event
* may be used to determine when the Finished message is received.
*
* The following event types expose implementation details of the handshake
* state machine. Consuming them is deprecated.
*
* |SSL_CB_ACCEPT_LOOP| (respectively, |SSL_CB_CONNECT_LOOP|) is signaled when
* a server (respectively, client) handshake progresses. The |value| argument
* is always one.
*
* |SSL_CB_ACCEPT_EXIT| (respectively, |SSL_CB_CONNECT_EXIT|) is signaled when
* a server (respectively, client) handshake completes, fails, or is paused.
* The |value| argument is one if the handshake succeeded and <= 0
* otherwise. */
OPENSSL_EXPORT void SSL_CTX_set_info_callback(
SSL_CTX *ctx, void (*cb)(const SSL *ssl, int type, int value));
/* SSL_CTX_get_info_callback returns the callback set by
* |SSL_CTX_set_info_callback|. */
OPENSSL_EXPORT void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,
int type,
int value);
/* SSL_set_info_callback configures a callback to be run at various events
* during a connection's lifetime. See |SSL_CTX_set_info_callback|. */
OPENSSL_EXPORT void SSL_set_info_callback(
SSL *ssl, void (*cb)(const SSL *ssl, int type, int value));
/* SSL_get_info_callback returns the callback set by |SSL_set_info_callback|. */
OPENSSL_EXPORT void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl,
int type,
int value);
/* SSL_state_string_long returns the current state of the handshake state
* machine as a string. This may be useful for debugging and logging. */
OPENSSL_EXPORT const char *SSL_state_string_long(const SSL *ssl);
#define SSL_SENT_SHUTDOWN 1
#define SSL_RECEIVED_SHUTDOWN 2
/* SSL_get_shutdown returns a bitmask with a subset of |SSL_SENT_SHUTDOWN| and
* |SSL_RECEIVED_SHUTDOWN| to query whether close_notify was sent or received,
* respectively. */
OPENSSL_EXPORT int SSL_get_shutdown(const SSL *ssl);
/* SSL_get_peer_signature_algorithm returns the signature algorithm used by the
* peer. If not applicable, it returns zero. */
OPENSSL_EXPORT uint16_t SSL_get_peer_signature_algorithm(const SSL *ssl);
/* SSL_get_client_random writes up to |max_out| bytes of the most recent
* handshake's client_random to |out| and returns the number of bytes written.
* If |max_out| is zero, it returns the size of the client_random. */
OPENSSL_EXPORT size_t SSL_get_client_random(const SSL *ssl, uint8_t *out,
size_t max_out);
/* SSL_get_server_random writes up to |max_out| bytes of the most recent
* handshake's server_random to |out| and returns the number of bytes written.
* If |max_out| is zero, it returns the size of the server_random. */
OPENSSL_EXPORT size_t SSL_get_server_random(const SSL *ssl, uint8_t *out,
size_t max_out);
/* SSL_get_pending_cipher returns the cipher suite for the current handshake or
* NULL if one has not been negotiated yet or there is no pending handshake. */
OPENSSL_EXPORT const SSL_CIPHER *SSL_get_pending_cipher(const SSL *ssl);
/* SSL_set_retain_only_sha256_of_client_certs, on a server, sets whether only
* the SHA-256 hash of peer's certificate should be saved in memory and in the
* session. This can save memory, ticket size and session cache space. If
* enabled, |SSL_get_peer_certificate| will return NULL after the handshake
* completes. See the |peer_sha256| field of |SSL_SESSION| for the hash. */
OPENSSL_EXPORT void SSL_set_retain_only_sha256_of_client_certs(SSL *ssl,
int enable);
/* SSL_CTX_set_retain_only_sha256_of_client_certs, on a server, sets whether
* only the SHA-256 hash of peer's certificate should be saved in memory and in
* the session. This can save memory, ticket size and session cache space. If
* enabled, |SSL_get_peer_certificate| will return NULL after the handshake
* completes. See the |peer_sha256| field of |SSL_SESSION| for the hash. */
OPENSSL_EXPORT void SSL_CTX_set_retain_only_sha256_of_client_certs(SSL_CTX *ctx,
int enable);
/* SSL_CTX_set_grease_enabled configures whether sockets on |ctx| should enable
* GREASE. See draft-davidben-tls-grease-01. */
OPENSSL_EXPORT void SSL_CTX_set_grease_enabled(SSL_CTX *ctx, int enabled);
/* SSL_max_seal_overhead returns the maximum overhead, in bytes, of sealing a
* record with |ssl|. */
OPENSSL_EXPORT size_t SSL_max_seal_overhead(const SSL *ssl);
/* SSL_get_ticket_age_skew returns the difference, in seconds, between the
* client-sent ticket age and the server-computed value in TLS 1.3 server
* connections which resumed a session. */
OPENSSL_EXPORT int32_t SSL_get_ticket_age_skew(const SSL *ssl);
/* Deprecated functions. */
/* SSL_library_init calls |CRYPTO_library_init| and returns one. */
OPENSSL_EXPORT int SSL_library_init(void);
/* SSL_CIPHER_description writes a description of |cipher| into |buf| and
* returns |buf|. If |buf| is NULL, it returns a newly allocated string, to be
* freed with |OPENSSL_free|, or NULL on error.
*
* The description includes a trailing newline and has the form:
* AES128-SHA Kx=RSA Au=RSA Enc=AES(128) Mac=SHA1
*
* Consider |SSL_CIPHER_standard_name| or |SSL_CIPHER_get_name| instead. */
OPENSSL_EXPORT const char *SSL_CIPHER_description(const SSL_CIPHER *cipher,
char *buf, int len);
/* SSL_CIPHER_get_version returns the string "TLSv1/SSLv3". */
OPENSSL_EXPORT const char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher);
/* SSL_CIPHER_get_rfc_name returns a newly-allocated string containing the
* result of |SSL_CIPHER_standard_name| or NULL on error. The caller is
* responsible for calling |OPENSSL_free| on the result.
*
* Use |SSL_CIPHER_standard_name| instead. */
OPENSSL_EXPORT char *SSL_CIPHER_get_rfc_name(const SSL_CIPHER *cipher);
typedef void COMP_METHOD;
/* SSL_COMP_get_compression_methods returns NULL. */
OPENSSL_EXPORT STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void);
/* SSL_COMP_add_compression_method returns one. */
OPENSSL_EXPORT int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm);
/* SSL_COMP_get_name returns NULL. */
OPENSSL_EXPORT const char *SSL_COMP_get_name(const COMP_METHOD *comp);
/* SSL_COMP_free_compression_methods does nothing. */
OPENSSL_EXPORT void SSL_COMP_free_compression_methods(void);
/* SSLv23_method calls |TLS_method|. */
OPENSSL_EXPORT const SSL_METHOD *SSLv23_method(void);
/* These version-specific methods behave exactly like |TLS_method| and
* |DTLS_method| except they also call |SSL_CTX_set_min_proto_version| and
* |SSL_CTX_set_max_proto_version| to lock connections to that protocol
* version. */
OPENSSL_EXPORT const SSL_METHOD *TLSv1_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_1_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_2_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_2_method(void);
/* SSLv3_method returns an |SSL_METHOD| with no versions enabled. */
OPENSSL_EXPORT const SSL_METHOD *SSLv3_method(void);
/* These client- and server-specific methods call their corresponding generic
* methods. */
OPENSSL_EXPORT const SSL_METHOD *TLS_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLS_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *SSLv23_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *SSLv23_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *SSLv3_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *SSLv3_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_1_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_1_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_2_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *TLSv1_2_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLS_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLS_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_client_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_2_server_method(void);
OPENSSL_EXPORT const SSL_METHOD *DTLSv1_2_client_method(void);
/* SSL_clear resets |ssl| to allow another connection and returns one on success
* or zero on failure. It returns most configuration state but releases memory
* associated with the current connection.
*
* Free |ssl| and create a new one instead. */
OPENSSL_EXPORT int SSL_clear(SSL *ssl);
/* SSL_CTX_set_tmp_rsa_callback does nothing. */
OPENSSL_EXPORT void SSL_CTX_set_tmp_rsa_callback(
SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, int keylength));
/* SSL_set_tmp_rsa_callback does nothing. */
OPENSSL_EXPORT void SSL_set_tmp_rsa_callback(SSL *ssl,
RSA *(*cb)(SSL *ssl, int is_export,
int keylength));
/* SSL_CTX_sess_connect returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_connect(const SSL_CTX *ctx);
/* SSL_CTX_sess_connect_good returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_connect_good(const SSL_CTX *ctx);
/* SSL_CTX_sess_connect_renegotiate returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_connect_renegotiate(const SSL_CTX *ctx);
/* SSL_CTX_sess_accept returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_accept(const SSL_CTX *ctx);
/* SSL_CTX_sess_accept_renegotiate returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_accept_renegotiate(const SSL_CTX *ctx);
/* SSL_CTX_sess_accept_good returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_accept_good(const SSL_CTX *ctx);
/* SSL_CTX_sess_hits returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_hits(const SSL_CTX *ctx);
/* SSL_CTX_sess_cb_hits returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_cb_hits(const SSL_CTX *ctx);
/* SSL_CTX_sess_misses returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_misses(const SSL_CTX *ctx);
/* SSL_CTX_sess_timeouts returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_timeouts(const SSL_CTX *ctx);
/* SSL_CTX_sess_cache_full returns zero. */
OPENSSL_EXPORT int SSL_CTX_sess_cache_full(const SSL_CTX *ctx);
/* SSL_cutthrough_complete calls |SSL_in_false_start|. */
OPENSSL_EXPORT int SSL_cutthrough_complete(const SSL *s);
/* SSL_num_renegotiations calls |SSL_total_renegotiations|. */
OPENSSL_EXPORT int SSL_num_renegotiations(const SSL *ssl);
/* SSL_CTX_need_tmp_RSA returns zero. */
OPENSSL_EXPORT int SSL_CTX_need_tmp_RSA(const SSL_CTX *ctx);
/* SSL_need_tmp_RSA returns zero. */
OPENSSL_EXPORT int SSL_need_tmp_RSA(const SSL *ssl);
/* SSL_CTX_set_tmp_rsa returns one. */
OPENSSL_EXPORT int SSL_CTX_set_tmp_rsa(SSL_CTX *ctx, const RSA *rsa);
/* SSL_set_tmp_rsa returns one. */
OPENSSL_EXPORT int SSL_set_tmp_rsa(SSL *ssl, const RSA *rsa);
/* SSL_CTX_get_read_ahead returns zero. */
OPENSSL_EXPORT int SSL_CTX_get_read_ahead(const SSL_CTX *ctx);
/* SSL_CTX_set_read_ahead does nothing. */
OPENSSL_EXPORT void SSL_CTX_set_read_ahead(SSL_CTX *ctx, int yes);
/* SSL_get_read_ahead returns zero. */
OPENSSL_EXPORT int SSL_get_read_ahead(const SSL *s);
/* SSL_set_read_ahead does nothing. */
OPENSSL_EXPORT void SSL_set_read_ahead(SSL *s, int yes);
/* SSL_renegotiate put an error on the error queue and returns zero. */
OPENSSL_EXPORT int SSL_renegotiate(SSL *ssl);
/* SSL_set_state does nothing. */
OPENSSL_EXPORT void SSL_set_state(SSL *ssl, int state);
/* SSL_get_shared_ciphers writes an empty string to |buf| and returns a
* pointer to |buf|, or NULL if |len| is less than or equal to zero. */
OPENSSL_EXPORT char *SSL_get_shared_ciphers(const SSL *ssl, char *buf, int len);
/* SSL_MODE_HANDSHAKE_CUTTHROUGH is the same as SSL_MODE_ENABLE_FALSE_START. */
#define SSL_MODE_HANDSHAKE_CUTTHROUGH SSL_MODE_ENABLE_FALSE_START
/* i2d_SSL_SESSION serializes |in| to the bytes pointed to by |*pp|. On success,
* it returns the number of bytes written and advances |*pp| by that many bytes.
* On failure, it returns -1. If |pp| is NULL, no bytes are written and only the
* length is returned.
*
* Use |SSL_SESSION_to_bytes| instead. */
OPENSSL_EXPORT int i2d_SSL_SESSION(SSL_SESSION *in, uint8_t **pp);
/* d2i_SSL_SESSION parses a serialized session from the |length| bytes pointed
* to by |*pp|. It returns the new |SSL_SESSION| and advances |*pp| by the
* number of bytes consumed on success and NULL on failure. The caller takes
* ownership of the new session and must call |SSL_SESSION_free| when done.
*
* If |a| is non-NULL, |*a| is released and set the new |SSL_SESSION|.
*
* Use |SSL_SESSION_from_bytes| instead. */
OPENSSL_EXPORT SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const uint8_t **pp,
long length);
/* i2d_SSL_SESSION_bio serializes |session| and writes the result to |bio|. It
* returns the number of bytes written on success and <= 0 on error. */
OPENSSL_EXPORT int i2d_SSL_SESSION_bio(BIO *bio, const SSL_SESSION *session);
/* d2i_SSL_SESSION_bio reads a serialized |SSL_SESSION| from |bio| and returns a
* newly-allocated |SSL_SESSION| or NULL on error. If |out| is not NULL, it also
* frees |*out| and sets |*out| to the new |SSL_SESSION|. */
OPENSSL_EXPORT SSL_SESSION *d2i_SSL_SESSION_bio(BIO *bio, SSL_SESSION **out);
/* ERR_load_SSL_strings does nothing. */
OPENSSL_EXPORT void ERR_load_SSL_strings(void);
/* SSL_load_error_strings does nothing. */
OPENSSL_EXPORT void SSL_load_error_strings(void);
/* SSL_CTX_set_tlsext_use_srtp calls |SSL_CTX_set_srtp_profiles|. It returns
* zero on success and one on failure.
*
* WARNING: this function is dangerous because it breaks the usual return value
* convention. Use |SSL_CTX_set_srtp_profiles| instead. */
OPENSSL_EXPORT int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx,
const char *profiles);
/* SSL_set_tlsext_use_srtp calls |SSL_set_srtp_profiles|. It returns zero on
* success and one on failure.
*
* WARNING: this function is dangerous because it breaks the usual return value
* convention. Use |SSL_set_srtp_profiles| instead. */
OPENSSL_EXPORT int SSL_set_tlsext_use_srtp(SSL *ssl, const char *profiles);
/* SSL_get_current_compression returns NULL. */
OPENSSL_EXPORT const COMP_METHOD *SSL_get_current_compression(SSL *s);
/* SSL_get_current_expansion returns NULL. */
OPENSSL_EXPORT const COMP_METHOD *SSL_get_current_expansion(SSL *s);
/* SSL_get_server_tmp_key returns zero. */
OPENSSL_EXPORT int *SSL_get_server_tmp_key(SSL *ssl, EVP_PKEY **out_key);
/* SSL_CTX_set_tmp_dh returns 1. */
OPENSSL_EXPORT int SSL_CTX_set_tmp_dh(SSL_CTX *ctx, const DH *dh);
/* SSL_set_tmp_dh returns 1. */
OPENSSL_EXPORT int SSL_set_tmp_dh(SSL *ssl, const DH *dh);
/* SSL_CTX_set_tmp_dh_callback does nothing. */
OPENSSL_EXPORT void SSL_CTX_set_tmp_dh_callback(
SSL_CTX *ctx, DH *(*callback)(SSL *ssl, int is_export, int keylength));
/* SSL_set_tmp_dh_callback does nothing. */
OPENSSL_EXPORT void SSL_set_tmp_dh_callback(SSL *ssl,
DH *(*dh)(SSL *ssl, int is_export,
int keylength));
#define SSL_set_app_data(s, arg) (SSL_set_ex_data(s, 0, (char *)(arg)))
#define SSL_get_app_data(s) (SSL_get_ex_data(s, 0))
#define SSL_SESSION_set_app_data(s, a) \
(SSL_SESSION_set_ex_data(s, 0, (char *)(a)))
#define SSL_SESSION_get_app_data(s) (SSL_SESSION_get_ex_data(s, 0))
#define SSL_CTX_get_app_data(ctx) (SSL_CTX_get_ex_data(ctx, 0))
#define SSL_CTX_set_app_data(ctx, arg) \
(SSL_CTX_set_ex_data(ctx, 0, (char *)(arg)))
#define OpenSSL_add_ssl_algorithms() SSL_library_init()
#define SSLeay_add_ssl_algorithms() SSL_library_init()
#define SSL_get_cipher(ssl) SSL_CIPHER_get_name(SSL_get_current_cipher(ssl))
#define SSL_get_cipher_bits(ssl, out_alg_bits) \
SSL_CIPHER_get_bits(SSL_get_current_cipher(ssl), out_alg_bits)
#define SSL_get_cipher_version(ssl) \
SSL_CIPHER_get_version(SSL_get_current_cipher(ssl))
#define SSL_get_cipher_name(ssl) \
SSL_CIPHER_get_name(SSL_get_current_cipher(ssl))
#define SSL_get_time(session) SSL_SESSION_get_time(session)
#define SSL_set_time(session, time) SSL_SESSION_set_time((session), (time))
#define SSL_get_timeout(session) SSL_SESSION_get_timeout(session)
#define SSL_set_timeout(session, timeout) \
SSL_SESSION_set_timeout((session), (timeout))
typedef struct ssl_comp_st SSL_COMP;
struct ssl_comp_st {
int id;
const char *name;
char *method;
};
DEFINE_STACK_OF(SSL_COMP)
/* The following flags do nothing and are included only to make it easier to
* compile code with BoringSSL. */
#define SSL_MODE_AUTO_RETRY 0
#define SSL_MODE_RELEASE_BUFFERS 0
#define SSL_MODE_SEND_CLIENTHELLO_TIME 0
#define SSL_MODE_SEND_SERVERHELLO_TIME 0
#define SSL_OP_ALL 0
#define SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION 0
#define SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS 0
#define SSL_OP_EPHEMERAL_RSA 0
#define SSL_OP_LEGACY_SERVER_CONNECT 0
#define SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER 0
#define SSL_OP_MICROSOFT_SESS_ID_BUG 0
#define SSL_OP_MSIE_SSLV2_RSA_PADDING 0
#define SSL_OP_NETSCAPE_CA_DN_BUG 0
#define SSL_OP_NETSCAPE_CHALLENGE_BUG 0
#define SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG 0
#define SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG 0
#define SSL_OP_NO_COMPRESSION 0
#define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION 0
#define SSL_OP_NO_SSLv2 0
#define SSL_OP_PKCS1_CHECK_1 0
#define SSL_OP_PKCS1_CHECK_2 0
#define SSL_OP_SINGLE_DH_USE 0
#define SSL_OP_SINGLE_ECDH_USE 0
#define SSL_OP_SSLEAY_080_CLIENT_DH_BUG 0
#define SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG 0
#define SSL_OP_TLS_BLOCK_PADDING_BUG 0
#define SSL_OP_TLS_D5_BUG 0
#define SSL_OP_TLS_ROLLBACK_BUG 0
#define SSL_VERIFY_CLIENT_ONCE 0
/* SSL_cache_hit calls |SSL_session_reused|. */
OPENSSL_EXPORT int SSL_cache_hit(SSL *ssl);
/* SSL_get_default_timeout returns |SSL_DEFAULT_SESSION_TIMEOUT|. */
OPENSSL_EXPORT long SSL_get_default_timeout(const SSL *ssl);
/* SSL_get_version returns a string describing the TLS version used by |ssl|.
* For example, "TLSv1.2" or "SSLv3". */
OPENSSL_EXPORT const char *SSL_get_version(const SSL *ssl);
/* SSL_get_cipher_list returns the name of the |n|th cipher in the output of
* |SSL_get_ciphers| or NULL if out of range. Use |SSL_get_ciphers| instead. */
OPENSSL_EXPORT const char *SSL_get_cipher_list(const SSL *ssl, int n);
/* SSL_CTX_set_client_cert_cb sets a callback which is called on the client if
* the server requests a client certificate and none is configured. On success,
* the callback should return one and set |*out_x509| to |*out_pkey| to a leaf
* certificate and private key, respectively, passing ownership. It should
* return zero to send no certificate and -1 to fail or pause the handshake. If
* the handshake is paused, |SSL_get_error| will return
* |SSL_ERROR_WANT_X509_LOOKUP|.
*
* The callback may call |SSL_get0_certificate_types| and
* |SSL_get_client_CA_list| for information on the server's certificate request.
*
* Use |SSL_CTX_set_cert_cb| instead. Configuring intermediate certificates with
* this function is confusing. This callback may not be registered concurrently
* with |SSL_CTX_set_cert_cb| or |SSL_set_cert_cb|. */
OPENSSL_EXPORT void SSL_CTX_set_client_cert_cb(
SSL_CTX *ctx,
int (*client_cert_cb)(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey));
#define SSL_NOTHING 1
#define SSL_WRITING 2
#define SSL_READING 3
#define SSL_X509_LOOKUP 4
#define SSL_CHANNEL_ID_LOOKUP 5
#define SSL_PENDING_SESSION 7
#define SSL_CERTIFICATE_SELECTION_PENDING 8
#define SSL_PRIVATE_KEY_OPERATION 9
#define SSL_PENDING_TICKET 10
#define SSL_EARLY_DATA_REJECTED 11
/* SSL_want returns one of the above values to determine what the most recent
* operation on |ssl| was blocked on. Use |SSL_get_error| instead. */
OPENSSL_EXPORT int SSL_want(const SSL *ssl);
#define SSL_want_read(ssl) (SSL_want(ssl) == SSL_READING)
#define SSL_want_write(ssl) (SSL_want(ssl) == SSL_WRITING)
/* SSL_get_finished writes up to |count| bytes of the Finished message sent by
* |ssl| to |buf|. It returns the total untruncated length or zero if none has
* been sent yet. At SSL 3.0 or TLS 1.3 and later, it returns zero.
*
* Use |SSL_get_tls_unique| instead. */
OPENSSL_EXPORT size_t SSL_get_finished(const SSL *ssl, void *buf, size_t count);
/* SSL_get_peer_finished writes up to |count| bytes of the Finished message
* received from |ssl|'s peer to |buf|. It returns the total untruncated length
* or zero if none has been received yet. At SSL 3.0 or TLS 1.3 and later, it
* returns zero.
*
* Use |SSL_get_tls_unique| instead. */
OPENSSL_EXPORT size_t SSL_get_peer_finished(const SSL *ssl, void *buf,
size_t count);
/* SSL_alert_type_string returns "!". Use |SSL_alert_type_string_long|
* instead. */
OPENSSL_EXPORT const char *SSL_alert_type_string(int value);
/* SSL_alert_desc_string returns "!!". Use |SSL_alert_desc_string_long|
* instead. */
OPENSSL_EXPORT const char *SSL_alert_desc_string(int value);
/* SSL_TXT_* expand to strings. */
#define SSL_TXT_MEDIUM "MEDIUM"
#define SSL_TXT_HIGH "HIGH"
#define SSL_TXT_FIPS "FIPS"
#define SSL_TXT_kRSA "kRSA"
#define SSL_TXT_kDHE "kDHE"
#define SSL_TXT_kEDH "kEDH"
#define SSL_TXT_kECDHE "kECDHE"
#define SSL_TXT_kEECDH "kEECDH"
#define SSL_TXT_kPSK "kPSK"
#define SSL_TXT_aRSA "aRSA"
#define SSL_TXT_aECDSA "aECDSA"
#define SSL_TXT_aPSK "aPSK"
#define SSL_TXT_DH "DH"
#define SSL_TXT_DHE "DHE"
#define SSL_TXT_EDH "EDH"
#define SSL_TXT_RSA "RSA"
#define SSL_TXT_ECDH "ECDH"
#define SSL_TXT_ECDHE "ECDHE"
#define SSL_TXT_EECDH "EECDH"
#define SSL_TXT_ECDSA "ECDSA"
#define SSL_TXT_PSK "PSK"
#define SSL_TXT_3DES "3DES"
#define SSL_TXT_RC4 "RC4"
#define SSL_TXT_AES128 "AES128"
#define SSL_TXT_AES256 "AES256"
#define SSL_TXT_AES "AES"
#define SSL_TXT_AES_GCM "AESGCM"
#define SSL_TXT_CHACHA20 "CHACHA20"
#define SSL_TXT_MD5 "MD5"
#define SSL_TXT_SHA1 "SHA1"
#define SSL_TXT_SHA "SHA"
#define SSL_TXT_SHA256 "SHA256"
#define SSL_TXT_SHA384 "SHA384"
#define SSL_TXT_SSLV3 "SSLv3"
#define SSL_TXT_TLSV1 "TLSv1"
#define SSL_TXT_TLSV1_1 "TLSv1.1"
#define SSL_TXT_TLSV1_2 "TLSv1.2"
#define SSL_TXT_TLSV1_3 "TLSv1.3"
#define SSL_TXT_ALL "ALL"
#define SSL_TXT_CMPDEF "COMPLEMENTOFDEFAULT"
typedef struct ssl_conf_ctx_st SSL_CONF_CTX;
/* SSL_state returns |SSL_ST_INIT| if a handshake is in progress and |SSL_ST_OK|
* otherwise.
*
* Use |SSL_is_init| instead. */
OPENSSL_EXPORT int SSL_state(const SSL *ssl);
#define SSL_get_state(ssl) SSL_state(ssl)
/* SSL_state_string returns the current state of the handshake state machine as
* a six-letter string. Use |SSL_state_string_long| for a more intelligible
* string. */
OPENSSL_EXPORT const char *SSL_state_string(const SSL *ssl);
/* SSL_set_shutdown causes |ssl| to behave as if the shutdown bitmask (see
* |SSL_get_shutdown|) were |mode|. This may be used to skip sending or
* receiving close_notify in |SSL_shutdown| by causing the implementation to
* believe the events already happened.
*
* It is an error to use |SSL_set_shutdown| to unset a bit that has already been
* set. Doing so will trigger an |assert| in debug builds and otherwise be
* ignored.
*
* Use |SSL_CTX_set_quiet_shutdown| instead. */
OPENSSL_EXPORT void SSL_set_shutdown(SSL *ssl, int mode);
/* SSL_CTX_set_tmp_ecdh calls |SSL_CTX_set1_curves| with a one-element list
* containing |ec_key|'s curve. */
OPENSSL_EXPORT int SSL_CTX_set_tmp_ecdh(SSL_CTX *ctx, const EC_KEY *ec_key);
/* SSL_set_tmp_ecdh calls |SSL_set1_curves| with a one-element list containing
* |ec_key|'s curve. */
OPENSSL_EXPORT int SSL_set_tmp_ecdh(SSL *ssl, const EC_KEY *ec_key);
/* SSL_add_dir_cert_subjects_to_stack lists files in directory |dir|. It calls
* |SSL_add_file_cert_subjects_to_stack| on each file and returns one on success
* or zero on error. This function is only available from the libdecrepit
* library. */
OPENSSL_EXPORT int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *out,
const char *dir);
/* SSL_set_private_key_digest_prefs copies |num_digests| NIDs from |digest_nids|
* into |ssl|. These digests will be used, in decreasing order of preference,
* when signing with |ssl|'s private key. It returns one on success and zero on
* error.
*
* Use |SSL_set_signing_algorithm_prefs| instead.
*
* TODO(davidben): Remove this API when callers have been updated. */
OPENSSL_EXPORT int SSL_set_private_key_digest_prefs(SSL *ssl,
const int *digest_nids,
size_t num_digests);
/* SSL_set_verify_result calls |abort| unless |result| is |X509_V_OK|.
*
* TODO(davidben): Remove this function once it has been removed from
* netty-tcnative. */
OPENSSL_EXPORT void SSL_set_verify_result(SSL *ssl, long result);
/* SSL_CTX_enable_tls_channel_id calls |SSL_CTX_set_tls_channel_id_enabled|. */
OPENSSL_EXPORT int SSL_CTX_enable_tls_channel_id(SSL_CTX *ctx);
/* SSL_enable_tls_channel_id calls |SSL_set_tls_channel_id_enabled|. */
OPENSSL_EXPORT int SSL_enable_tls_channel_id(SSL *ssl);
/* BIO_f_ssl returns a |BIO_METHOD| that can wrap an |SSL*| in a |BIO*|. Note
* that this has quite different behaviour from the version in OpenSSL (notably
* that it doesn't try to auto renegotiate).
*
* IMPORTANT: if you are not curl, don't use this. */
OPENSSL_EXPORT const BIO_METHOD *BIO_f_ssl(void);
/* BIO_set_ssl sets |ssl| as the underlying connection for |bio|, which must
* have been created using |BIO_f_ssl|. If |take_owership| is true, |bio| will
* call |SSL_free| on |ssl| when closed. It returns one on success or something
* other than one on error. */
OPENSSL_EXPORT long BIO_set_ssl(BIO *bio, SSL *ssl, int take_owership);
/* SSL_CTX_set_ecdh_auto returns one. */
#define SSL_CTX_set_ecdh_auto(ctx, onoff) 1
/* SSL_set_ecdh_auto returns one. */
#define SSL_set_ecdh_auto(ssl, onoff) 1
/* SSL_get_session returns a non-owning pointer to |ssl|'s session. For
* historical reasons, which session it returns depends on |ssl|'s state.
*
* Prior to the start of the initial handshake, it returns the session the
* caller set with |SSL_set_session|. After the initial handshake has finished
* and if no additional handshakes are in progress, it returns the currently
* active session. Its behavior is undefined while a handshake is in progress.
*
* If trying to add new sessions to an external session cache, use
* |SSL_CTX_sess_set_new_cb| instead. In particular, using the callback is
* required as of TLS 1.3. For compatibility, this function will return an
* unresumable session which may be cached, but will never be resumed.
*
* If querying properties of the connection, use APIs on the |SSL| object. */
OPENSSL_EXPORT SSL_SESSION *SSL_get_session(const SSL *ssl);
/* SSL_get0_session is an alias for |SSL_get_session|. */
#define SSL_get0_session SSL_get_session
/* SSL_get1_session acts like |SSL_get_session| but returns a new reference to
* the session. */
OPENSSL_EXPORT SSL_SESSION *SSL_get1_session(SSL *ssl);
/* Private structures.
*
* This structures are exposed for historical reasons, but access to them is
* deprecated. */
typedef struct ssl_protocol_method_st SSL_PROTOCOL_METHOD;
typedef struct ssl_x509_method_st SSL_X509_METHOD;
struct ssl_cipher_st {
/* name is the OpenSSL name for the cipher. */
const char *name;
/* standard_name is the IETF name for the cipher. */
const char *standard_name;
/* id is the cipher suite value bitwise OR-d with 0x03000000. */
uint32_t id;
/* algorithm_* are internal fields. See ssl/internal.h for their values. */
uint32_t algorithm_mkey;
uint32_t algorithm_auth;
uint32_t algorithm_enc;
uint32_t algorithm_mac;
uint32_t algorithm_prf;
};
#define SSL_MAX_SSL_SESSION_ID_LENGTH 32
#define SSL_MAX_SID_CTX_LENGTH 32
#define SSL_MAX_MASTER_KEY_LENGTH 48
struct ssl_session_st {
CRYPTO_refcount_t references;
int ssl_version; /* what ssl version session info is being kept in here? */
/* group_id is the ID of the ECDH group used to establish this session or zero
* if not applicable or unknown. */
uint16_t group_id;
/* peer_signature_algorithm is the signature algorithm used to authenticate
* the peer, or zero if not applicable or unknown. */
uint16_t peer_signature_algorithm;
/* master_key, in TLS 1.2 and below, is the master secret associated with the
* session. In TLS 1.3 and up, it is the resumption secret. */
int master_key_length;
uint8_t master_key[SSL_MAX_MASTER_KEY_LENGTH];
/* session_id - valid? */
unsigned int session_id_length;
uint8_t session_id[SSL_MAX_SSL_SESSION_ID_LENGTH];
/* this is used to determine whether the session is being reused in
* the appropriate context. It is up to the application to set this,
* via SSL_new */
uint8_t sid_ctx_length;
uint8_t sid_ctx[SSL_MAX_SID_CTX_LENGTH];
char *psk_identity;
/* certs contains the certificate chain from the peer, starting with the leaf
* certificate. */
STACK_OF(CRYPTO_BUFFER) *certs;
const SSL_X509_METHOD *x509_method;
/* x509_peer is the peer's certificate. */
X509 *x509_peer;
/* x509_chain is the certificate chain sent by the peer. NOTE: for historical
* reasons, when a client (so the peer is a server), the chain includes
* |peer|, but when a server it does not. */
STACK_OF(X509) *x509_chain;
/* x509_chain_without_leaf is a lazily constructed copy of |x509_chain| that
* omits the leaf certificate. This exists because OpenSSL, historically,
* didn't include the leaf certificate in the chain for a server, but did for
* a client. The |x509_chain| always includes it and, if an API call requires
* a chain without, it is stored here. */
STACK_OF(X509) *x509_chain_without_leaf;
/* verify_result is the result of certificate verification in the case of
* non-fatal certificate errors. */
long verify_result;
/* timeout is the lifetime of the session in seconds, measured from |time|.
* This is renewable up to |auth_timeout|. */
uint32_t timeout;
/* auth_timeout is the non-renewable lifetime of the session in seconds,
* measured from |time|. */
uint32_t auth_timeout;
/* time is the time the session was issued, measured in seconds from the UNIX
* epoch. */
uint64_t time;
const SSL_CIPHER *cipher;
CRYPTO_EX_DATA ex_data; /* application specific data */
/* These are used to make removal of session-ids more efficient and to
* implement a maximum cache size. */
SSL_SESSION *prev, *next;
char *tlsext_hostname;
/* RFC4507 info */
uint8_t *tlsext_tick; /* Session ticket */
size_t tlsext_ticklen; /* Session ticket length */
size_t tlsext_signed_cert_timestamp_list_length;
uint8_t *tlsext_signed_cert_timestamp_list; /* Server's list. */
/* The OCSP response that came with the session. */
size_t ocsp_response_length;
uint8_t *ocsp_response;
/* peer_sha256 contains the SHA-256 hash of the peer's certificate if
* |peer_sha256_valid| is true. */
uint8_t peer_sha256[SHA256_DIGEST_LENGTH];
/* original_handshake_hash contains the handshake hash (either SHA-1+MD5 or
* SHA-2, depending on TLS version) for the original, full handshake that
* created a session. This is used by Channel IDs during resumption. */
uint8_t original_handshake_hash[EVP_MAX_MD_SIZE];
uint8_t original_handshake_hash_len;
uint32_t tlsext_tick_lifetime_hint; /* Session lifetime hint in seconds */
uint32_t ticket_age_add;
/* ticket_max_early_data is the maximum amount of data allowed to be sent as
* early data. If zero, 0-RTT is disallowed. */
uint32_t ticket_max_early_data;
/* early_alpn is the ALPN protocol from the initial handshake. This is only
* stored for TLS 1.3 and above in order to enforce ALPN matching for 0-RTT
* resumptions. */
uint8_t *early_alpn;
size_t early_alpn_len;
/* extended_master_secret is true if the master secret in this session was
* generated using EMS and thus isn't vulnerable to the Triple Handshake
* attack. */
unsigned extended_master_secret:1;
/* peer_sha256_valid is non-zero if |peer_sha256| is valid. */
unsigned peer_sha256_valid:1; /* Non-zero if peer_sha256 is valid */
/* not_resumable is used to indicate that session resumption is disallowed. */
unsigned not_resumable:1;
/* ticket_age_add_valid is non-zero if |ticket_age_add| is valid. */
unsigned ticket_age_add_valid:1;
/* is_server is true if this session was created by a server. */
unsigned is_server:1;
};
/* ssl_cipher_preference_list_st contains a list of SSL_CIPHERs with
* equal-preference groups. For TLS clients, the groups are moot because the
* server picks the cipher and groups cannot be expressed on the wire. However,
* for servers, the equal-preference groups allow the client's preferences to
* be partially respected. (This only has an effect with
* SSL_OP_CIPHER_SERVER_PREFERENCE).
*
* The equal-preference groups are expressed by grouping SSL_CIPHERs together.
* All elements of a group have the same priority: no ordering is expressed
* within a group.
*
* The values in |ciphers| are in one-to-one correspondence with
* |in_group_flags|. (That is, sk_SSL_CIPHER_num(ciphers) is the number of
* bytes in |in_group_flags|.) The bytes in |in_group_flags| are either 1, to
* indicate that the corresponding SSL_CIPHER is not the last element of a
* group, or 0 to indicate that it is.
*
* For example, if |in_group_flags| contains all zeros then that indicates a
* traditional, fully-ordered preference. Every SSL_CIPHER is the last element
* of the group (i.e. they are all in a one-element group).
*
* For a more complex example, consider:
* ciphers: A B C D E F
* in_group_flags: 1 1 0 0 1 0
*
* That would express the following, order:
*
* A E
* B -> D -> F
* C
*/
struct ssl_cipher_preference_list_st {
STACK_OF(SSL_CIPHER) *ciphers;
uint8_t *in_group_flags;
};
DECLARE_STACK_OF(SSL_CUSTOM_EXTENSION)
/* ssl_ctx_st (aka |SSL_CTX|) contains configuration common to several SSL
* connections. */
struct ssl_ctx_st {
const SSL_PROTOCOL_METHOD *method;
const SSL_X509_METHOD *x509_method;
/* lock is used to protect various operations on this object. */
CRYPTO_MUTEX lock;
/* conf_max_version is the maximum acceptable protocol version configured by
* |SSL_CTX_set_max_proto_version|. Note this version is normalized in DTLS
* and is further constrainted by |SSL_OP_NO_*|. */
uint16_t conf_max_version;
/* conf_min_version is the minimum acceptable protocol version configured by
* |SSL_CTX_set_min_proto_version|. Note this version is normalized in DTLS
* and is further constrainted by |SSL_OP_NO_*|. */
uint16_t conf_min_version;
struct ssl_cipher_preference_list_st *cipher_list;
X509_STORE *cert_store;
LHASH_OF(SSL_SESSION) *sessions;
/* Most session-ids that will be cached, default is
* SSL_SESSION_CACHE_MAX_SIZE_DEFAULT. 0 is unlimited. */
unsigned long session_cache_size;
SSL_SESSION *session_cache_head;
SSL_SESSION *session_cache_tail;
/* handshakes_since_cache_flush is the number of successful handshakes since
* the last cache flush. */
int handshakes_since_cache_flush;
/* This can have one of 2 values, ored together,
* SSL_SESS_CACHE_CLIENT,
* SSL_SESS_CACHE_SERVER,
* Default is SSL_SESSION_CACHE_SERVER, which means only
* SSL_accept which cache SSL_SESSIONS. */
int session_cache_mode;
/* session_timeout is the default lifetime for new sessions in TLS 1.2 and
* earlier, in seconds. */
uint32_t session_timeout;
/* session_psk_dhe_timeout is the default lifetime for new sessions in TLS
* 1.3, in seconds. */
uint32_t session_psk_dhe_timeout;
/* If this callback is not null, it will be called each time a session id is
* added to the cache. If this function returns 1, it means that the
* callback will do a SSL_SESSION_free() when it has finished using it.
* Otherwise, on 0, it means the callback has finished with it. If
* remove_session_cb is not null, it will be called when a session-id is
* removed from the cache. After the call, OpenSSL will SSL_SESSION_free()
* it. */
int (*new_session_cb)(SSL *ssl, SSL_SESSION *sess);
void (*remove_session_cb)(SSL_CTX *ctx, SSL_SESSION *sess);
SSL_SESSION *(*get_session_cb)(SSL *ssl, uint8_t *data, int len,
int *copy);
CRYPTO_refcount_t references;
/* if defined, these override the X509_verify_cert() calls */
int (*app_verify_callback)(X509_STORE_CTX *store_ctx, void *arg);
void *app_verify_arg;
/* Default password callback. */
pem_password_cb *default_passwd_callback;
/* Default password callback user data. */
void *default_passwd_callback_userdata;
/* get client cert callback */
int (*client_cert_cb)(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey);
/* get channel id callback */
void (*channel_id_cb)(SSL *ssl, EVP_PKEY **out_pkey);
CRYPTO_EX_DATA ex_data;
/* custom_*_extensions stores any callback sets for custom extensions. Note
* that these pointers will be NULL if the stack would otherwise be empty. */
STACK_OF(SSL_CUSTOM_EXTENSION) *client_custom_extensions;
STACK_OF(SSL_CUSTOM_EXTENSION) *server_custom_extensions;
/* Default values used when no per-SSL value is defined follow */
void (*info_callback)(const SSL *ssl, int type, int value);
/* what we put in client cert requests */
STACK_OF(CRYPTO_BUFFER) *client_CA;
/* cached_x509_client_CA is a cache of parsed versions of the elements of
* |client_CA|. */
STACK_OF(X509_NAME) *cached_x509_client_CA;
/* Default values to use in SSL structures follow (these are copied by
* SSL_new) */
uint32_t options;
uint32_t mode;
uint32_t max_cert_list;
struct cert_st /* CERT */ *cert;
/* callback that allows applications to peek at protocol messages */
void (*msg_callback)(int write_p, int version, int content_type,
const void *buf, size_t len, SSL *ssl, void *arg);
void *msg_callback_arg;
int verify_mode;
int (*default_verify_callback)(
int ok, X509_STORE_CTX *ctx); /* called 'verify_callback' in the SSL */
X509_VERIFY_PARAM *param;
/* select_certificate_cb is called before most ClientHello processing and
* before the decision whether to resume a session is made. See
* |ssl_select_cert_result_t| for details of the return values. */
enum ssl_select_cert_result_t (*select_certificate_cb)(
const SSL_CLIENT_HELLO *);
/* dos_protection_cb is called once the resumption decision for a ClientHello
* has been made. It returns one to continue the handshake or zero to
* abort. */
int (*dos_protection_cb) (const SSL_CLIENT_HELLO *);
/* Maximum amount of data to send in one fragment. actual record size can be
* more than this due to padding and MAC overheads. */
uint16_t max_send_fragment;
/* TLS extensions servername callback */
int (*tlsext_servername_callback)(SSL *, int *, void *);
void *tlsext_servername_arg;
/* RFC 4507 session ticket keys */
uint8_t tlsext_tick_key_name[SSL_TICKET_KEY_NAME_LEN];
uint8_t tlsext_tick_hmac_key[16];
uint8_t tlsext_tick_aes_key[16];
/* Callback to support customisation of ticket key setting */
int (*tlsext_ticket_key_cb)(SSL *ssl, uint8_t *name, uint8_t *iv,
EVP_CIPHER_CTX *ectx, HMAC_CTX *hctx, int enc);
/* Server-only: psk_identity_hint is the default identity hint to send in
* PSK-based key exchanges. */
char *psk_identity_hint;
unsigned int (*psk_client_callback)(SSL *ssl, const char *hint,
char *identity,
unsigned int max_identity_len,
uint8_t *psk, unsigned int max_psk_len);
unsigned int (*psk_server_callback)(SSL *ssl, const char *identity,
uint8_t *psk, unsigned int max_psk_len);
/* retain_only_sha256_of_client_certs is true if we should compute the SHA256
* hash of the peer's certificate and then discard it to save memory and
* session space. Only effective on the server side. */
char retain_only_sha256_of_client_certs;
/* Next protocol negotiation information */
/* (for experimental NPN extension). */
/* For a server, this contains a callback function by which the set of
* advertised protocols can be provided. */
int (*next_protos_advertised_cb)(SSL *ssl, const uint8_t **out,
unsigned *out_len, void *arg);
void *next_protos_advertised_cb_arg;
/* For a client, this contains a callback function that selects the
* next protocol from the list provided by the server. */
int (*next_proto_select_cb)(SSL *ssl, uint8_t **out, uint8_t *out_len,
const uint8_t *in, unsigned in_len, void *arg);
void *next_proto_select_cb_arg;
/* ALPN information
* (we are in the process of transitioning from NPN to ALPN.) */
/* For a server, this contains a callback function that allows the
* server to select the protocol for the connection.
* out: on successful return, this must point to the raw protocol
* name (without the length prefix).
* outlen: on successful return, this contains the length of |*out|.
* in: points to the client's list of supported protocols in
* wire-format.
* inlen: the length of |in|. */
int (*alpn_select_cb)(SSL *s, const uint8_t **out, uint8_t *out_len,
const uint8_t *in, unsigned in_len, void *arg);
void *alpn_select_cb_arg;
/* For a client, this contains the list of supported protocols in wire
* format. */
uint8_t *alpn_client_proto_list;
unsigned alpn_client_proto_list_len;
/* SRTP profiles we are willing to do from RFC 5764 */
STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
/* Supported group values inherited by SSL structure */
size_t supported_group_list_len;
uint16_t *supported_group_list;
/* The client's Channel ID private key. */
EVP_PKEY *tlsext_channel_id_private;
/* keylog_callback, if not NULL, is the key logging callback. See
* |SSL_CTX_set_keylog_callback|. */
void (*keylog_callback)(const SSL *ssl, const char *line);
/* current_time_cb, if not NULL, is the function to use to get the current
* time. It sets |*out_clock| to the current time. See
* |SSL_CTX_set_current_time_cb|. */
void (*current_time_cb)(const SSL *ssl, struct timeval *out_clock);
/* pool is used for all |CRYPTO_BUFFER|s in case we wish to share certificate
* memory. */
CRYPTO_BUFFER_POOL *pool;
/* ticket_aead_method contains function pointers for opening and sealing
* session tickets. */
const SSL_TICKET_AEAD_METHOD *ticket_aead_method;
/* verify_sigalgs, if not empty, is the set of signature algorithms
* accepted from the peer in decreasing order of preference. */
uint16_t *verify_sigalgs;
size_t num_verify_sigalgs;
/* quiet_shutdown is true if the connection should not send a close_notify on
* shutdown. */
unsigned quiet_shutdown:1;
/* ocsp_stapling_enabled is only used by client connections and indicates
* whether OCSP stapling will be requested. */
unsigned ocsp_stapling_enabled:1;
/* If true, a client will request certificate timestamps. */
unsigned signed_cert_timestamps_enabled:1;
/* tlsext_channel_id_enabled is one if Channel ID is enabled and zero
* otherwise. For a server, means that we'll accept Channel IDs from clients.
* For a client, means that we'll advertise support. */
unsigned tlsext_channel_id_enabled:1;
/* grease_enabled is one if draft-davidben-tls-grease-01 is enabled and zero
* otherwise. */
unsigned grease_enabled:1;
/* i_promise_to_verify_certs_after_the_handshake indicates that the
* application is using the |CRYPTO_BUFFER|-based methods and understands
* that this currently requires post-handshake verification of
* certificates. */
unsigned i_promise_to_verify_certs_after_the_handshake:1;
/* allow_unknown_alpn_protos is one if the client allows unsolicited ALPN
* protocols from the peer. */
unsigned allow_unknown_alpn_protos:1;
/* ed25519_enabled is one if Ed25519 is advertised in the handshake. */
unsigned ed25519_enabled:1;
};
/* Nodejs compatibility section (hidden).
*
* These defines exist for node.js, with the hope that we can eliminate the
* need for them over time. */
#define SSLerr(function, reason) \
ERR_put_error(ERR_LIB_SSL, 0, reason, __FILE__, __LINE__)
/* Preprocessor compatibility section (hidden).
*
* Historically, a number of APIs were implemented in OpenSSL as macros and
* constants to 'ctrl' functions. To avoid breaking #ifdefs in consumers, this
* section defines a number of legacy macros.
*
* Although using either the CTRL values or their wrapper macros in #ifdefs is
* still supported, the CTRL values may not be passed to |SSL_ctrl| and
* |SSL_CTX_ctrl|. Call the functions (previously wrapper macros) instead.
*
* See PORTING.md in the BoringSSL source tree for a table of corresponding
* functions.
* https://boringssl.googlesource.com/boringssl/+/master/PORTING.md#Replacements-for-values
*/
#define DTLS_CTRL_GET_TIMEOUT doesnt_exist
#define DTLS_CTRL_HANDLE_TIMEOUT doesnt_exist
#define SSL_CTRL_CHAIN doesnt_exist
#define SSL_CTRL_CHAIN_CERT doesnt_exist
#define SSL_CTRL_CHANNEL_ID doesnt_exist
#define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS doesnt_exist
#define SSL_CTRL_CLEAR_MODE doesnt_exist
#define SSL_CTRL_CLEAR_OPTIONS doesnt_exist
#define SSL_CTRL_EXTRA_CHAIN_CERT doesnt_exist
#define SSL_CTRL_GET_CHAIN_CERTS doesnt_exist
#define SSL_CTRL_GET_CHANNEL_ID doesnt_exist
#define SSL_CTRL_GET_CLIENT_CERT_TYPES doesnt_exist
#define SSL_CTRL_GET_EXTRA_CHAIN_CERTS doesnt_exist
#define SSL_CTRL_GET_MAX_CERT_LIST doesnt_exist
#define SSL_CTRL_GET_NUM_RENEGOTIATIONS doesnt_exist
#define SSL_CTRL_GET_READ_AHEAD doesnt_exist
#define SSL_CTRL_GET_RI_SUPPORT doesnt_exist
#define SSL_CTRL_GET_SESSION_REUSED doesnt_exist
#define SSL_CTRL_GET_SESS_CACHE_MODE doesnt_exist
#define SSL_CTRL_GET_SESS_CACHE_SIZE doesnt_exist
#define SSL_CTRL_GET_TLSEXT_TICKET_KEYS doesnt_exist
#define SSL_CTRL_GET_TOTAL_RENEGOTIATIONS doesnt_exist
#define SSL_CTRL_MODE doesnt_exist
#define SSL_CTRL_NEED_TMP_RSA doesnt_exist
#define SSL_CTRL_OPTIONS doesnt_exist
#define SSL_CTRL_SESS_NUMBER doesnt_exist
#define SSL_CTRL_SET_CURVES doesnt_exist
#define SSL_CTRL_SET_CURVES_LIST doesnt_exist
#define SSL_CTRL_SET_ECDH_AUTO doesnt_exist
#define SSL_CTRL_SET_MAX_CERT_LIST doesnt_exist
#define SSL_CTRL_SET_MAX_SEND_FRAGMENT doesnt_exist
#define SSL_CTRL_SET_MSG_CALLBACK doesnt_exist
#define SSL_CTRL_SET_MSG_CALLBACK_ARG doesnt_exist
#define SSL_CTRL_SET_MTU doesnt_exist
#define SSL_CTRL_SET_READ_AHEAD doesnt_exist
#define SSL_CTRL_SET_SESS_CACHE_MODE doesnt_exist
#define SSL_CTRL_SET_SESS_CACHE_SIZE doesnt_exist
#define SSL_CTRL_SET_TLSEXT_HOSTNAME doesnt_exist
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG doesnt_exist
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB doesnt_exist
#define SSL_CTRL_SET_TLSEXT_TICKET_KEYS doesnt_exist
#define SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB doesnt_exist
#define SSL_CTRL_SET_TMP_DH doesnt_exist
#define SSL_CTRL_SET_TMP_DH_CB doesnt_exist
#define SSL_CTRL_SET_TMP_ECDH doesnt_exist
#define SSL_CTRL_SET_TMP_ECDH_CB doesnt_exist
#define SSL_CTRL_SET_TMP_RSA doesnt_exist
#define SSL_CTRL_SET_TMP_RSA_CB doesnt_exist
#define DTLSv1_get_timeout DTLSv1_get_timeout
#define DTLSv1_handle_timeout DTLSv1_handle_timeout
#define SSL_CTX_add0_chain_cert SSL_CTX_add0_chain_cert
#define SSL_CTX_add1_chain_cert SSL_CTX_add1_chain_cert
#define SSL_CTX_add_extra_chain_cert SSL_CTX_add_extra_chain_cert
#define SSL_CTX_clear_extra_chain_certs SSL_CTX_clear_extra_chain_certs
#define SSL_CTX_clear_chain_certs SSL_CTX_clear_chain_certs
#define SSL_CTX_clear_mode SSL_CTX_clear_mode
#define SSL_CTX_clear_options SSL_CTX_clear_options
#define SSL_CTX_get0_chain_certs SSL_CTX_get0_chain_certs
#define SSL_CTX_get_extra_chain_certs SSL_CTX_get_extra_chain_certs
#define SSL_CTX_get_max_cert_list SSL_CTX_get_max_cert_list
#define SSL_CTX_get_mode SSL_CTX_get_mode
#define SSL_CTX_get_options SSL_CTX_get_options
#define SSL_CTX_get_read_ahead SSL_CTX_get_read_ahead
#define SSL_CTX_get_session_cache_mode SSL_CTX_get_session_cache_mode
#define SSL_CTX_get_tlsext_ticket_keys SSL_CTX_get_tlsext_ticket_keys
#define SSL_CTX_need_tmp_RSA SSL_CTX_need_tmp_RSA
#define SSL_CTX_sess_get_cache_size SSL_CTX_sess_get_cache_size
#define SSL_CTX_sess_number SSL_CTX_sess_number
#define SSL_CTX_sess_set_cache_size SSL_CTX_sess_set_cache_size
#define SSL_CTX_set0_chain SSL_CTX_set0_chain
#define SSL_CTX_set1_chain SSL_CTX_set1_chain
#define SSL_CTX_set1_curves SSL_CTX_set1_curves
#define SSL_CTX_set_max_cert_list SSL_CTX_set_max_cert_list
#define SSL_CTX_set_max_send_fragment SSL_CTX_set_max_send_fragment
#define SSL_CTX_set_mode SSL_CTX_set_mode
#define SSL_CTX_set_msg_callback_arg SSL_CTX_set_msg_callback_arg
#define SSL_CTX_set_options SSL_CTX_set_options
#define SSL_CTX_set_read_ahead SSL_CTX_set_read_ahead
#define SSL_CTX_set_session_cache_mode SSL_CTX_set_session_cache_mode
#define SSL_CTX_set_tlsext_servername_arg SSL_CTX_set_tlsext_servername_arg
#define SSL_CTX_set_tlsext_servername_callback \
SSL_CTX_set_tlsext_servername_callback
#define SSL_CTX_set_tlsext_ticket_key_cb SSL_CTX_set_tlsext_ticket_key_cb
#define SSL_CTX_set_tlsext_ticket_keys SSL_CTX_set_tlsext_ticket_keys
#define SSL_CTX_set_tmp_dh SSL_CTX_set_tmp_dh
#define SSL_CTX_set_tmp_ecdh SSL_CTX_set_tmp_ecdh
#define SSL_CTX_set_tmp_rsa SSL_CTX_set_tmp_rsa
#define SSL_add0_chain_cert SSL_add0_chain_cert
#define SSL_add1_chain_cert SSL_add1_chain_cert
#define SSL_clear_chain_certs SSL_clear_chain_certs
#define SSL_clear_mode SSL_clear_mode
#define SSL_clear_options SSL_clear_options
#define SSL_get0_certificate_types SSL_get0_certificate_types
#define SSL_get0_chain_certs SSL_get0_chain_certs
#define SSL_get_max_cert_list SSL_get_max_cert_list
#define SSL_get_mode SSL_get_mode
#define SSL_get_options SSL_get_options
#define SSL_get_secure_renegotiation_support \
SSL_get_secure_renegotiation_support
#define SSL_need_tmp_RSA SSL_need_tmp_RSA
#define SSL_num_renegotiations SSL_num_renegotiations
#define SSL_session_reused SSL_session_reused
#define SSL_set0_chain SSL_set0_chain
#define SSL_set1_chain SSL_set1_chain
#define SSL_set1_curves SSL_set1_curves
#define SSL_set_max_cert_list SSL_set_max_cert_list
#define SSL_set_max_send_fragment SSL_set_max_send_fragment
#define SSL_set_mode SSL_set_mode
#define SSL_set_msg_callback_arg SSL_set_msg_callback_arg
#define SSL_set_mtu SSL_set_mtu
#define SSL_set_options SSL_set_options
#define SSL_set_tlsext_host_name SSL_set_tlsext_host_name
#define SSL_set_tmp_dh SSL_set_tmp_dh
#define SSL_set_tmp_ecdh SSL_set_tmp_ecdh
#define SSL_set_tmp_rsa SSL_set_tmp_rsa
#define SSL_total_renegotiations SSL_total_renegotiations
#if defined(__cplusplus)
} /* extern C */
extern "C++" {
namespace bssl {
BORINGSSL_MAKE_DELETER(SSL, SSL_free)
BORINGSSL_MAKE_DELETER(SSL_CTX, SSL_CTX_free)
BORINGSSL_MAKE_DELETER(SSL_SESSION, SSL_SESSION_free)
} // namespace bssl
} /* extern C++ */
#endif
#define SSL_R_APP_DATA_IN_HANDSHAKE 100
#define SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT 101
#define SSL_R_BAD_ALERT 102
#define SSL_R_BAD_CHANGE_CIPHER_SPEC 103
#define SSL_R_BAD_DATA_RETURNED_BY_CALLBACK 104
#define SSL_R_BAD_DH_P_LENGTH 105
#define SSL_R_BAD_DIGEST_LENGTH 106
#define SSL_R_BAD_ECC_CERT 107
#define SSL_R_BAD_ECPOINT 108
#define SSL_R_BAD_HANDSHAKE_RECORD 109
#define SSL_R_BAD_HELLO_REQUEST 110
#define SSL_R_BAD_LENGTH 111
#define SSL_R_BAD_PACKET_LENGTH 112
#define SSL_R_BAD_RSA_ENCRYPT 113
#define SSL_R_BAD_SIGNATURE 114
#define SSL_R_BAD_SRTP_MKI_VALUE 115
#define SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST 116
#define SSL_R_BAD_SSL_FILETYPE 117
#define SSL_R_BAD_WRITE_RETRY 118
#define SSL_R_BIO_NOT_SET 119
#define SSL_R_BN_LIB 120
#define SSL_R_BUFFER_TOO_SMALL 121
#define SSL_R_CA_DN_LENGTH_MISMATCH 122
#define SSL_R_CA_DN_TOO_LONG 123
#define SSL_R_CCS_RECEIVED_EARLY 124
#define SSL_R_CERTIFICATE_VERIFY_FAILED 125
#define SSL_R_CERT_CB_ERROR 126
#define SSL_R_CERT_LENGTH_MISMATCH 127
#define SSL_R_CHANNEL_ID_NOT_P256 128
#define SSL_R_CHANNEL_ID_SIGNATURE_INVALID 129
#define SSL_R_CIPHER_OR_HASH_UNAVAILABLE 130
#define SSL_R_CLIENTHELLO_PARSE_FAILED 131
#define SSL_R_CLIENTHELLO_TLSEXT 132
#define SSL_R_CONNECTION_REJECTED 133
#define SSL_R_CONNECTION_TYPE_NOT_SET 134
#define SSL_R_CUSTOM_EXTENSION_ERROR 135
#define SSL_R_DATA_LENGTH_TOO_LONG 136
#define SSL_R_DECODE_ERROR 137
#define SSL_R_DECRYPTION_FAILED 138
#define SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC 139
#define SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG 140
#define SSL_R_DH_P_TOO_LONG 141
#define SSL_R_DIGEST_CHECK_FAILED 142
#define SSL_R_DTLS_MESSAGE_TOO_BIG 143
#define SSL_R_ECC_CERT_NOT_FOR_SIGNING 144
#define SSL_R_EMS_STATE_INCONSISTENT 145
#define SSL_R_ENCRYPTED_LENGTH_TOO_LONG 146
#define SSL_R_ERROR_ADDING_EXTENSION 147
#define SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST 148
#define SSL_R_ERROR_PARSING_EXTENSION 149
#define SSL_R_EXCESSIVE_MESSAGE_SIZE 150
#define SSL_R_EXTRA_DATA_IN_MESSAGE 151
#define SSL_R_FRAGMENT_MISMATCH 152
#define SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION 153
#define SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO 154
#define SSL_R_HTTPS_PROXY_REQUEST 155
#define SSL_R_HTTP_REQUEST 156
#define SSL_R_INAPPROPRIATE_FALLBACK 157
#define SSL_R_INVALID_COMMAND 158
#define SSL_R_INVALID_MESSAGE 159
#define SSL_R_INVALID_SSL_SESSION 160
#define SSL_R_INVALID_TICKET_KEYS_LENGTH 161
#define SSL_R_LENGTH_MISMATCH 162
#define SSL_R_MISSING_EXTENSION 164
#define SSL_R_MISSING_RSA_CERTIFICATE 165
#define SSL_R_MISSING_TMP_DH_KEY 166
#define SSL_R_MISSING_TMP_ECDH_KEY 167
#define SSL_R_MIXED_SPECIAL_OPERATOR_WITH_GROUPS 168
#define SSL_R_MTU_TOO_SMALL 169
#define SSL_R_NEGOTIATED_BOTH_NPN_AND_ALPN 170
#define SSL_R_NESTED_GROUP 171
#define SSL_R_NO_CERTIFICATES_RETURNED 172
#define SSL_R_NO_CERTIFICATE_ASSIGNED 173
#define SSL_R_NO_CERTIFICATE_SET 174
#define SSL_R_NO_CIPHERS_AVAILABLE 175
#define SSL_R_NO_CIPHERS_PASSED 176
#define SSL_R_NO_CIPHER_MATCH 177
#define SSL_R_NO_COMPRESSION_SPECIFIED 178
#define SSL_R_NO_METHOD_SPECIFIED 179
#define SSL_R_NO_P256_SUPPORT 180
#define SSL_R_NO_PRIVATE_KEY_ASSIGNED 181
#define SSL_R_NO_RENEGOTIATION 182
#define SSL_R_NO_REQUIRED_DIGEST 183
#define SSL_R_NO_SHARED_CIPHER 184
#define SSL_R_NULL_SSL_CTX 185
#define SSL_R_NULL_SSL_METHOD_PASSED 186
#define SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED 187
#define SSL_R_OLD_SESSION_VERSION_NOT_RETURNED 188
#define SSL_R_OUTPUT_ALIASES_INPUT 189
#define SSL_R_PARSE_TLSEXT 190
#define SSL_R_PATH_TOO_LONG 191
#define SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE 192
#define SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE 193
#define SSL_R_PROTOCOL_IS_SHUTDOWN 194
#define SSL_R_PSK_IDENTITY_NOT_FOUND 195
#define SSL_R_PSK_NO_CLIENT_CB 196
#define SSL_R_PSK_NO_SERVER_CB 197
#define SSL_R_READ_TIMEOUT_EXPIRED 198
#define SSL_R_RECORD_LENGTH_MISMATCH 199
#define SSL_R_RECORD_TOO_LARGE 200
#define SSL_R_RENEGOTIATION_ENCODING_ERR 201
#define SSL_R_RENEGOTIATION_MISMATCH 202
#define SSL_R_REQUIRED_CIPHER_MISSING 203
#define SSL_R_RESUMED_EMS_SESSION_WITHOUT_EMS_EXTENSION 204
#define SSL_R_RESUMED_NON_EMS_SESSION_WITH_EMS_EXTENSION 205
#define SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING 206
#define SSL_R_SERVERHELLO_TLSEXT 207
#define SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED 208
#define SSL_R_SESSION_MAY_NOT_BE_CREATED 209
#define SSL_R_SIGNATURE_ALGORITHMS_EXTENSION_SENT_BY_SERVER 210
#define SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES 211
#define SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE 212
#define SSL_R_SSL3_EXT_INVALID_SERVERNAME 213
#define SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION 214
#define SSL_R_SSL_HANDSHAKE_FAILURE 215
#define SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG 216
#define SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST 217
#define SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG 218
#define SSL_R_TOO_MANY_EMPTY_FRAGMENTS 219
#define SSL_R_TOO_MANY_WARNING_ALERTS 220
#define SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS 221
#define SSL_R_UNEXPECTED_EXTENSION 222
#define SSL_R_UNEXPECTED_MESSAGE 223
#define SSL_R_UNEXPECTED_OPERATOR_IN_GROUP 224
#define SSL_R_UNEXPECTED_RECORD 225
#define SSL_R_UNINITIALIZED 226
#define SSL_R_UNKNOWN_ALERT_TYPE 227
#define SSL_R_UNKNOWN_CERTIFICATE_TYPE 228
#define SSL_R_UNKNOWN_CIPHER_RETURNED 229
#define SSL_R_UNKNOWN_CIPHER_TYPE 230
#define SSL_R_UNKNOWN_DIGEST 231
#define SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE 232
#define SSL_R_UNKNOWN_PROTOCOL 233
#define SSL_R_UNKNOWN_SSL_VERSION 234
#define SSL_R_UNKNOWN_STATE 235
#define SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED 236
#define SSL_R_UNSUPPORTED_CIPHER 237
#define SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM 238
#define SSL_R_UNSUPPORTED_ELLIPTIC_CURVE 239
#define SSL_R_UNSUPPORTED_PROTOCOL 240
#define SSL_R_WRONG_CERTIFICATE_TYPE 241
#define SSL_R_WRONG_CIPHER_RETURNED 242
#define SSL_R_WRONG_CURVE 243
#define SSL_R_WRONG_MESSAGE_TYPE 244
#define SSL_R_WRONG_SIGNATURE_TYPE 245
#define SSL_R_WRONG_SSL_VERSION 246
#define SSL_R_WRONG_VERSION_NUMBER 247
#define SSL_R_X509_LIB 248
#define SSL_R_X509_VERIFICATION_SETUP_PROBLEMS 249
#define SSL_R_SHUTDOWN_WHILE_IN_INIT 250
#define SSL_R_INVALID_OUTER_RECORD_TYPE 251
#define SSL_R_UNSUPPORTED_PROTOCOL_FOR_CUSTOM_KEY 252
#define SSL_R_NO_COMMON_SIGNATURE_ALGORITHMS 253
#define SSL_R_DOWNGRADE_DETECTED 254
#define SSL_R_BUFFERED_MESSAGES_ON_CIPHER_CHANGE 255
#define SSL_R_INVALID_COMPRESSION_LIST 256
#define SSL_R_DUPLICATE_EXTENSION 257
#define SSL_R_MISSING_KEY_SHARE 258
#define SSL_R_INVALID_ALPN_PROTOCOL 259
#define SSL_R_TOO_MANY_KEY_UPDATES 260
#define SSL_R_BLOCK_CIPHER_PAD_IS_WRONG 261
#define SSL_R_NO_CIPHERS_SPECIFIED 262
#define SSL_R_RENEGOTIATION_EMS_MISMATCH 263
#define SSL_R_DUPLICATE_KEY_SHARE 264
#define SSL_R_NO_GROUPS_SPECIFIED 265
#define SSL_R_NO_SHARED_GROUP 266
#define SSL_R_PRE_SHARED_KEY_MUST_BE_LAST 267
#define SSL_R_OLD_SESSION_PRF_HASH_MISMATCH 268
#define SSL_R_INVALID_SCT_LIST 269
#define SSL_R_TOO_MUCH_SKIPPED_EARLY_DATA 270
#define SSL_R_PSK_IDENTITY_BINDER_COUNT_MISMATCH 271
#define SSL_R_CANNOT_PARSE_LEAF_CERT 272
#define SSL_R_SERVER_CERT_CHANGED 273
#define SSL_R_CERTIFICATE_AND_PRIVATE_KEY_MISMATCH 274
#define SSL_R_CANNOT_HAVE_BOTH_PRIVKEY_AND_METHOD 275
#define SSL_R_TICKET_ENCRYPTION_FAILED 276
#define SSL_R_ALPN_MISMATCH_ON_EARLY_DATA 277
#define SSL_R_WRONG_VERSION_ON_EARLY_DATA 278
#define SSL_R_CHANNEL_ID_ON_EARLY_DATA 279
#define SSL_R_NO_SUPPORTED_VERSIONS_ENABLED 280
#define SSL_R_APPLICATION_DATA_INSTEAD_OF_HANDSHAKE 281
#define SSL_R_SSLV3_ALERT_CLOSE_NOTIFY 1000
#define SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE 1010
#define SSL_R_SSLV3_ALERT_BAD_RECORD_MAC 1020
#define SSL_R_TLSV1_ALERT_DECRYPTION_FAILED 1021
#define SSL_R_TLSV1_ALERT_RECORD_OVERFLOW 1022
#define SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE 1030
#define SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE 1040
#define SSL_R_SSLV3_ALERT_NO_CERTIFICATE 1041
#define SSL_R_SSLV3_ALERT_BAD_CERTIFICATE 1042
#define SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE 1043
#define SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED 1044
#define SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED 1045
#define SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN 1046
#define SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER 1047
#define SSL_R_TLSV1_ALERT_UNKNOWN_CA 1048
#define SSL_R_TLSV1_ALERT_ACCESS_DENIED 1049
#define SSL_R_TLSV1_ALERT_DECODE_ERROR 1050
#define SSL_R_TLSV1_ALERT_DECRYPT_ERROR 1051
#define SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION 1060
#define SSL_R_TLSV1_ALERT_PROTOCOL_VERSION 1070
#define SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY 1071
#define SSL_R_TLSV1_ALERT_INTERNAL_ERROR 1080
#define SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK 1086
#define SSL_R_TLSV1_ALERT_USER_CANCELLED 1090
#define SSL_R_TLSV1_ALERT_NO_RENEGOTIATION 1100
#define SSL_R_TLSV1_UNSUPPORTED_EXTENSION 1110
#define SSL_R_TLSV1_CERTIFICATE_UNOBTAINABLE 1111
#define SSL_R_TLSV1_UNRECOGNIZED_NAME 1112
#define SSL_R_TLSV1_BAD_CERTIFICATE_STATUS_RESPONSE 1113
#define SSL_R_TLSV1_BAD_CERTIFICATE_HASH_VALUE 1114
#define SSL_R_TLSV1_UNKNOWN_PSK_IDENTITY 1115
#define SSL_R_TLSV1_CERTIFICATE_REQUIRED 1116
#define SSL_R_TOO_MUCH_READ_EARLY_DATA 1117
#endif /* OPENSSL_HEADER_SSL_H */
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