|
- /* 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_INTERNAL_H
- #define OPENSSL_HEADER_SSL_INTERNAL_H
-
- #include <openssl/base.h>
-
- #include <openssl/aead.h>
- #include <openssl/pqueue.h>
- #include <openssl/ssl.h>
- #include <openssl/stack.h>
-
- #if defined(OPENSSL_WINDOWS)
- /* Windows defines struct timeval in winsock2.h. */
- #pragma warning(push, 3)
- #include <winsock2.h>
- #pragma warning(pop)
- #else
- #include <sys/time.h>
- #endif
-
-
- /* Cipher suites. */
-
- /* Bits for |algorithm_mkey| (key exchange algorithm). */
- #define SSL_kRSA 0x00000001L
- #define SSL_kDHE 0x00000002L
- #define SSL_kECDHE 0x00000004L
- /* SSL_kPSK is only set for plain PSK, not ECDHE_PSK. */
- #define SSL_kPSK 0x00000008L
-
- /* Bits for |algorithm_auth| (server authentication). */
- #define SSL_aRSA 0x00000001L
- #define SSL_aECDSA 0x00000002L
- /* SSL_aPSK is set for both PSK and ECDHE_PSK. */
- #define SSL_aPSK 0x00000004L
-
- /* Bits for |algorithm_enc| (symmetric encryption). */
- #define SSL_3DES 0x00000001L
- #define SSL_RC4 0x00000002L
- #define SSL_AES128 0x00000004L
- #define SSL_AES256 0x00000008L
- #define SSL_AES128GCM 0x00000010L
- #define SSL_AES256GCM 0x00000020L
- #define SSL_CHACHA20POLY1305_OLD 0x00000040L
- #define SSL_eNULL 0x00000080L
- #define SSL_CHACHA20POLY1305 0x00000100L
-
- #define SSL_AES (SSL_AES128 | SSL_AES256 | SSL_AES128GCM | SSL_AES256GCM)
-
- /* Bits for |algorithm_mac| (symmetric authentication). */
- #define SSL_MD5 0x00000001L
- #define SSL_SHA1 0x00000002L
- #define SSL_SHA256 0x00000004L
- #define SSL_SHA384 0x00000008L
- /* SSL_AEAD is set for all AEADs. */
- #define SSL_AEAD 0x00000010L
-
- /* Bits for |algorithm_prf| (handshake digest). */
- #define SSL_HANDSHAKE_MAC_DEFAULT 0x1
- #define SSL_HANDSHAKE_MAC_SHA256 0x2
- #define SSL_HANDSHAKE_MAC_SHA384 0x4
-
- /* SSL_MAX_DIGEST is the number of digest types which exist. When adding a new
- * one, update the table in ssl_cipher.c. */
- #define SSL_MAX_DIGEST 4
-
- /* ssl_cipher_get_evp_aead sets |*out_aead| to point to the correct EVP_AEAD
- * object for |cipher| protocol version |version|. It sets |*out_mac_secret_len|
- * and |*out_fixed_iv_len| to the MAC key length and fixed IV length,
- * respectively. The MAC key length is zero except for legacy block and stream
- * ciphers. It returns 1 on success and 0 on error. */
- int ssl_cipher_get_evp_aead(const EVP_AEAD **out_aead,
- size_t *out_mac_secret_len,
- size_t *out_fixed_iv_len,
- const SSL_CIPHER *cipher, uint16_t version);
-
- /* ssl_get_handshake_digest returns the |EVP_MD| corresponding to
- * |algorithm_prf|. It returns SHA-1 for |SSL_HANDSHAKE_DEFAULT|. The caller is
- * responsible for maintaining the additional MD5 digest and switching to
- * SHA-256 in TLS 1.2. */
- const EVP_MD *ssl_get_handshake_digest(uint32_t algorithm_prf);
-
- /* ssl_create_cipher_list evaluates |rule_str| according to the ciphers in
- * |ssl_method|. It sets |*out_cipher_list| to a newly-allocated
- * |ssl_cipher_preference_list_st| containing the result.
- * |*out_cipher_list_by_id| is set to a list of selected ciphers sorted by
- * id. It returns |(*out_cipher_list)->ciphers| on success and NULL on
- * failure. */
- STACK_OF(SSL_CIPHER) *
- ssl_create_cipher_list(const SSL_PROTOCOL_METHOD *ssl_method,
- struct ssl_cipher_preference_list_st **out_cipher_list,
- STACK_OF(SSL_CIPHER) **out_cipher_list_by_id,
- const char *rule_str);
-
- /* ssl_cipher_get_value returns the cipher suite id of |cipher|. */
- uint16_t ssl_cipher_get_value(const SSL_CIPHER *cipher);
-
- /* ssl_cipher_get_key_type returns the |EVP_PKEY_*| value corresponding to the
- * server key used in |cipher| or |EVP_PKEY_NONE| if there is none. */
- int ssl_cipher_get_key_type(const SSL_CIPHER *cipher);
-
- /* ssl_cipher_has_server_public_key returns 1 if |cipher| involves a server
- * public key in the key exchange, sent in a server Certificate message.
- * Otherwise it returns 0. */
- int ssl_cipher_has_server_public_key(const SSL_CIPHER *cipher);
-
- /* ssl_cipher_requires_server_key_exchange returns 1 if |cipher| requires a
- * ServerKeyExchange message. Otherwise it returns 0.
- *
- * Unlike |ssl_cipher_has_server_public_key|, this function may return zero
- * while still allowing |cipher| an optional ServerKeyExchange. This is the
- * case for plain PSK ciphers. */
- int ssl_cipher_requires_server_key_exchange(const SSL_CIPHER *cipher);
-
- /* ssl_cipher_get_record_split_len, for TLS 1.0 CBC mode ciphers, returns the
- * length of an encrypted 1-byte record, for use in record-splitting. Otherwise
- * it returns zero. */
- size_t ssl_cipher_get_record_split_len(const SSL_CIPHER *cipher);
-
-
- /* Encryption layer. */
-
- /* SSL_AEAD_CTX contains information about an AEAD that is being used to encrypt
- * an SSL connection. */
- struct ssl_aead_ctx_st {
- const SSL_CIPHER *cipher;
- EVP_AEAD_CTX ctx;
- /* fixed_nonce contains any bytes of the nonce that are fixed for all
- * records. */
- uint8_t fixed_nonce[12];
- uint8_t fixed_nonce_len, variable_nonce_len;
- /* variable_nonce_included_in_record is non-zero if the variable nonce
- * for a record is included as a prefix before the ciphertext. */
- char variable_nonce_included_in_record;
- /* random_variable_nonce is non-zero if the variable nonce is
- * randomly generated, rather than derived from the sequence
- * number. */
- char random_variable_nonce;
- /* omit_length_in_ad is non-zero if the length should be omitted in the
- * AEAD's ad parameter. */
- char omit_length_in_ad;
- /* omit_version_in_ad is non-zero if the version should be omitted
- * in the AEAD's ad parameter. */
- char omit_version_in_ad;
- /* xor_fixed_nonce is non-zero if the fixed nonce should be XOR'd into the
- * variable nonce rather than prepended. */
- char xor_fixed_nonce;
- } /* SSL_AEAD_CTX */;
-
- /* SSL_AEAD_CTX_new creates a newly-allocated |SSL_AEAD_CTX| using the supplied
- * key material. It returns NULL on error. Only one of |SSL_AEAD_CTX_open| or
- * |SSL_AEAD_CTX_seal| may be used with the resulting object, depending on
- * |direction|. |version| is the normalized protocol version, so DTLS 1.0 is
- * represented as 0x0301, not 0xffef. */
- SSL_AEAD_CTX *SSL_AEAD_CTX_new(enum evp_aead_direction_t direction,
- uint16_t version, const SSL_CIPHER *cipher,
- const uint8_t *enc_key, size_t enc_key_len,
- const uint8_t *mac_key, size_t mac_key_len,
- const uint8_t *fixed_iv, size_t fixed_iv_len);
-
- /* SSL_AEAD_CTX_free frees |ctx|. */
- void SSL_AEAD_CTX_free(SSL_AEAD_CTX *ctx);
-
- /* SSL_AEAD_CTX_explicit_nonce_len returns the length of the explicit nonce for
- * |ctx|, if any. |ctx| may be NULL to denote the null cipher. */
- size_t SSL_AEAD_CTX_explicit_nonce_len(SSL_AEAD_CTX *ctx);
-
- /* SSL_AEAD_CTX_max_overhead returns the maximum overhead of calling
- * |SSL_AEAD_CTX_seal|. |ctx| may be NULL to denote the null cipher. */
- size_t SSL_AEAD_CTX_max_overhead(SSL_AEAD_CTX *ctx);
-
- /* SSL_AEAD_CTX_open authenticates and decrypts |in_len| bytes from |in| and
- * writes the result to |out|. It returns one on success and zero on
- * error. |ctx| may be NULL to denote the null cipher.
- *
- * If |in| and |out| alias then |out| must be <= |in| + |explicit_nonce_len|. */
- int SSL_AEAD_CTX_open(SSL_AEAD_CTX *ctx, uint8_t *out, size_t *out_len,
- size_t max_out, uint8_t type, uint16_t wire_version,
- const uint8_t seqnum[8], const uint8_t *in,
- size_t in_len);
-
- /* SSL_AEAD_CTX_seal encrypts and authenticates |in_len| bytes from |in| and
- * writes the result to |out|. It returns one on success and zero on
- * error. |ctx| may be NULL to denote the null cipher.
- *
- * If |in| and |out| alias then |out| + |explicit_nonce_len| must be <= |in| */
- int SSL_AEAD_CTX_seal(SSL_AEAD_CTX *ctx, uint8_t *out, size_t *out_len,
- size_t max_out, uint8_t type, uint16_t wire_version,
- const uint8_t seqnum[8], const uint8_t *in,
- size_t in_len);
-
-
- /* DTLS replay bitmap. */
-
- /* DTLS1_BITMAP maintains a sliding window of 64 sequence numbers to detect
- * replayed packets. It should be initialized by zeroing every field. */
- typedef struct dtls1_bitmap_st {
- /* map is a bit mask of the last 64 sequence numbers. Bit
- * |1<<i| corresponds to |max_seq_num - i|. */
- uint64_t map;
- /* max_seq_num is the largest sequence number seen so far as a 64-bit
- * integer. */
- uint64_t max_seq_num;
- } DTLS1_BITMAP;
-
-
- /* Record layer. */
-
- /* ssl_record_sequence_update increments the sequence number in |seq|. It
- * returns one on success and zero on wraparound. */
- int ssl_record_sequence_update(uint8_t *seq, size_t seq_len);
-
- /* ssl_record_prefix_len returns the length of the prefix before the ciphertext
- * of a record for |ssl|.
- *
- * TODO(davidben): Expose this as part of public API once the high-level
- * buffer-free APIs are available. */
- size_t ssl_record_prefix_len(const SSL *ssl);
-
- enum ssl_open_record_t {
- ssl_open_record_success,
- ssl_open_record_discard,
- ssl_open_record_partial,
- ssl_open_record_error,
- };
-
- /* tls_open_record decrypts a record from |in|.
- *
- * On success, it returns |ssl_open_record_success|. It sets |*out_type| to the
- * record type, |*out_len| to the plaintext length, and writes the record body
- * to |out|. It sets |*out_consumed| to the number of bytes of |in| consumed.
- * Note that |*out_len| may be zero.
- *
- * If a record was successfully processed but should be discarded, it returns
- * |ssl_open_record_discard| and sets |*out_consumed| to the number of bytes
- * consumed.
- *
- * If the input did not contain a complete record, it returns
- * |ssl_open_record_partial|. It sets |*out_consumed| to the total number of
- * bytes necessary. It is guaranteed that a successful call to |tls_open_record|
- * will consume at least that many bytes.
- *
- * On failure, it returns |ssl_open_record_error| and sets |*out_alert| to an
- * alert to emit.
- *
- * If |in| and |out| alias, |out| must be <= |in| + |ssl_record_prefix_len|. */
- enum ssl_open_record_t tls_open_record(
- SSL *ssl, uint8_t *out_type, uint8_t *out, size_t *out_len,
- size_t *out_consumed, uint8_t *out_alert, size_t max_out, const uint8_t *in,
- size_t in_len);
-
- /* dtls_open_record implements |tls_open_record| for DTLS. It never returns
- * |ssl_open_record_partial| but otherwise behaves analogously. */
- enum ssl_open_record_t dtls_open_record(
- SSL *ssl, uint8_t *out_type, uint8_t *out, size_t *out_len,
- size_t *out_consumed, uint8_t *out_alert, size_t max_out, const uint8_t *in,
- size_t in_len);
-
- /* ssl_seal_prefix_len returns the length of the prefix before the ciphertext
- * when sealing a record with |ssl|. Note that this value may differ from
- * |ssl_record_prefix_len| when TLS 1.0 CBC record-splitting is enabled. Sealing
- * a small record may also result in a smaller output than this value.
- *
- * TODO(davidben): Expose this as part of public API once the high-level
- * buffer-free APIs are available. */
- size_t ssl_seal_prefix_len(const SSL *ssl);
-
- /* ssl_max_seal_overhead returns the maximum overhead of sealing a record with
- * |ssl|. This includes |ssl_seal_prefix_len|.
- *
- * TODO(davidben): Expose this as part of public API once the high-level
- * buffer-free APIs are available. */
- size_t ssl_max_seal_overhead(const SSL *ssl);
-
- /* tls_seal_record seals a new record of type |type| and body |in| and writes it
- * to |out|. At most |max_out| bytes will be written. It returns one on success
- * and zero on error. If enabled, |tls_seal_record| implements TLS 1.0 CBC 1/n-1
- * record splitting and may write two records concatenated.
- *
- * For a large record, the ciphertext will begin |ssl_seal_prefix_len| bytes
- * into out. Aligning |out| appropriately may improve performance. It writes at
- * most |in_len| + |ssl_max_seal_overhead| bytes to |out|.
- *
- * If |in| and |out| alias, |out| + |ssl_seal_prefix_len| must be <= |in|. */
- int tls_seal_record(SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out,
- uint8_t type, const uint8_t *in, size_t in_len);
-
- enum dtls1_use_epoch_t {
- dtls1_use_previous_epoch,
- dtls1_use_current_epoch,
- };
-
- /* dtls_seal_record implements |tls_seal_record| for DTLS. |use_epoch| selects
- * which epoch's cipher state to use. */
- int dtls_seal_record(SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out,
- uint8_t type, const uint8_t *in, size_t in_len,
- enum dtls1_use_epoch_t use_epoch);
-
- /* ssl_set_read_state sets |ssl|'s read cipher state to |aead_ctx|. It takes
- * ownership of |aead_ctx|. */
- void ssl_set_read_state(SSL *ssl, SSL_AEAD_CTX *aead_ctx);
-
- /* ssl_set_write_state sets |ssl|'s write cipher state to |aead_ctx|. It takes
- * ownership of |aead_ctx|. */
- void ssl_set_write_state(SSL *ssl, SSL_AEAD_CTX *aead_ctx);
-
-
- /* Private key operations. */
-
- /* ssl_has_private_key returns one if |ssl| has a private key
- * configured and zero otherwise. */
- int ssl_has_private_key(SSL *ssl);
-
- /* ssl_private_key_* call the corresponding function on the
- * |SSL_PRIVATE_KEY_METHOD| for |ssl|, if configured. Otherwise, they implement
- * the operation with |EVP_PKEY|. */
-
- int ssl_private_key_type(SSL *ssl);
-
- size_t ssl_private_key_max_signature_len(SSL *ssl);
-
- enum ssl_private_key_result_t ssl_private_key_sign(
- 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);
-
- enum ssl_private_key_result_t ssl_private_key_sign_complete(
- SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out);
-
- enum ssl_private_key_result_t ssl_private_key_decrypt(
- SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out,
- const uint8_t *in, size_t in_len);
-
- enum ssl_private_key_result_t ssl_private_key_decrypt_complete(
- SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out);
-
-
- /* Custom extensions */
-
- /* ssl_custom_extension (a.k.a. SSL_CUSTOM_EXTENSION) is a structure that
- * contains information about custom-extension callbacks. */
- struct ssl_custom_extension {
- SSL_custom_ext_add_cb add_callback;
- void *add_arg;
- SSL_custom_ext_free_cb free_callback;
- SSL_custom_ext_parse_cb parse_callback;
- void *parse_arg;
- uint16_t value;
- };
-
- void SSL_CUSTOM_EXTENSION_free(SSL_CUSTOM_EXTENSION *custom_extension);
-
- int custom_ext_add_clienthello(SSL *ssl, CBB *extensions);
- int custom_ext_parse_serverhello(SSL *ssl, int *out_alert, uint16_t value,
- const CBS *extension);
- int custom_ext_parse_clienthello(SSL *ssl, int *out_alert, uint16_t value,
- const CBS *extension);
- int custom_ext_add_serverhello(SSL *ssl, CBB *extensions);
-
-
- /* Handshake hash.
- *
- * The TLS handshake maintains a transcript of all handshake messages. At
- * various points in the protocol, this is either a handshake buffer, a rolling
- * hash (selected by cipher suite) or both. */
-
- /* ssl3_init_handshake_buffer initializes the handshake buffer and resets the
- * handshake hash. It returns one success and zero on failure. */
- int ssl3_init_handshake_buffer(SSL *ssl);
-
- /* ssl3_init_handshake_hash initializes the handshake hash based on the pending
- * cipher and the contents of the handshake buffer. Subsequent calls to
- * |ssl3_update_handshake_hash| will update the rolling hash. It returns one on
- * success and zero on failure. It is an error to call this function after the
- * handshake buffer is released. */
- int ssl3_init_handshake_hash(SSL *ssl);
-
- /* ssl3_free_handshake_buffer releases the handshake buffer. Subsequent calls
- * to |ssl3_update_handshake_hash| will not update the handshake buffer. */
- void ssl3_free_handshake_buffer(SSL *ssl);
-
- /* ssl3_free_handshake_hash releases the handshake hash. */
- void ssl3_free_handshake_hash(SSL *ssl);
-
- /* ssl3_update_handshake_hash adds |in| to the handshake buffer and handshake
- * hash, whichever is enabled. It returns one on success and zero on failure. */
- int ssl3_update_handshake_hash(SSL *ssl, const uint8_t *in, size_t in_len);
-
-
- /* ECDH curves. */
-
- #define SSL_CURVE_SECP256R1 23
- #define SSL_CURVE_SECP384R1 24
- #define SSL_CURVE_SECP521R1 25
- #define SSL_CURVE_X25519 29
-
- /* An SSL_ECDH_METHOD is an implementation of ECDH-like key exchanges for
- * TLS. */
- struct ssl_ecdh_method_st {
- int nid;
- uint16_t curve_id;
- const char name[8];
-
- /* cleanup releases state in |ctx|. */
- void (*cleanup)(SSL_ECDH_CTX *ctx);
-
- /* generate_keypair generates a keypair and writes the public value to
- * |out_public_key|. It returns one on success and zero on error. */
- int (*generate_keypair)(SSL_ECDH_CTX *ctx, CBB *out_public_key);
-
- /* compute_secret performs a key exchange against |peer_key| and, on
- * success, returns one and sets |*out_secret| and |*out_secret_len| to
- * a newly-allocated buffer containing the shared secret. The caller must
- * release this buffer with |OPENSSL_free|. Otherwise, it returns zero and
- * sets |*out_alert| to an alert to send to the peer. */
- int (*compute_secret)(SSL_ECDH_CTX *ctx, uint8_t **out_secret,
- size_t *out_secret_len, uint8_t *out_alert,
- const uint8_t *peer_key, size_t peer_key_len);
- } /* SSL_ECDH_METHOD */;
-
- /* ssl_nid_to_curve_id looks up the curve corresponding to |nid|. On success, it
- * sets |*out_curve_id| to the curve ID and returns one. Otherwise, it returns
- * zero. */
- int ssl_nid_to_curve_id(uint16_t *out_curve_id, int nid);
-
- /* SSL_ECDH_CTX_init sets up |ctx| for use with curve |curve_id|. It returns one
- * on success and zero on error. */
- int SSL_ECDH_CTX_init(SSL_ECDH_CTX *ctx, uint16_t curve_id);
-
- /* SSL_ECDH_CTX_init_for_dhe sets up |ctx| for use with legacy DHE-based ciphers
- * where the server specifies a group. It takes ownership of |params|. */
- void SSL_ECDH_CTX_init_for_dhe(SSL_ECDH_CTX *ctx, DH *params);
-
- /* SSL_ECDH_CTX_cleanup releases memory associated with |ctx|. It is legal to
- * call it in the zero state. */
- void SSL_ECDH_CTX_cleanup(SSL_ECDH_CTX *ctx);
-
- /* The following functions call the corresponding method of
- * |SSL_ECDH_METHOD|. */
- int SSL_ECDH_CTX_generate_keypair(SSL_ECDH_CTX *ctx, CBB *out_public_key);
- int SSL_ECDH_CTX_compute_secret(SSL_ECDH_CTX *ctx, uint8_t **out_secret,
- size_t *out_secret_len, uint8_t *out_alert,
- const uint8_t *peer_key, size_t peer_key_len);
-
-
- /* Transport buffers. */
-
- /* ssl_read_buffer returns a pointer to contents of the read buffer. */
- uint8_t *ssl_read_buffer(SSL *ssl);
-
- /* ssl_read_buffer_len returns the length of the read buffer. */
- size_t ssl_read_buffer_len(const SSL *ssl);
-
- /* ssl_read_buffer_extend_to extends the read buffer to the desired length. For
- * TLS, it reads to the end of the buffer until the buffer is |len| bytes
- * long. For DTLS, it reads a new packet and ignores |len|. It returns one on
- * success, zero on EOF, and a negative number on error.
- *
- * It is an error to call |ssl_read_buffer_extend_to| in DTLS when the buffer is
- * non-empty. */
- int ssl_read_buffer_extend_to(SSL *ssl, size_t len);
-
- /* ssl_read_buffer_consume consumes |len| bytes from the read buffer. It
- * advances the data pointer and decrements the length. The memory consumed will
- * remain valid until the next call to |ssl_read_buffer_extend| or it is
- * discarded with |ssl_read_buffer_discard|. */
- void ssl_read_buffer_consume(SSL *ssl, size_t len);
-
- /* ssl_read_buffer_discard discards the consumed bytes from the read buffer. If
- * the buffer is now empty, it releases memory used by it. */
- void ssl_read_buffer_discard(SSL *ssl);
-
- /* ssl_read_buffer_clear releases all memory associated with the read buffer and
- * zero-initializes it. */
- void ssl_read_buffer_clear(SSL *ssl);
-
- /* ssl_write_buffer_is_pending returns one if the write buffer has pending data
- * and zero if is empty. */
- int ssl_write_buffer_is_pending(const SSL *ssl);
-
- /* ssl_write_buffer_init initializes the write buffer. On success, it sets
- * |*out_ptr| to the start of the write buffer with space for up to |max_len|
- * bytes. It returns one on success and zero on failure. Call
- * |ssl_write_buffer_set_len| to complete initialization. */
- int ssl_write_buffer_init(SSL *ssl, uint8_t **out_ptr, size_t max_len);
-
- /* ssl_write_buffer_set_len is called after |ssl_write_buffer_init| to complete
- * initialization after |len| bytes are written to the buffer. */
- void ssl_write_buffer_set_len(SSL *ssl, size_t len);
-
- /* ssl_write_buffer_flush flushes the write buffer to the transport. It returns
- * one on success and <= 0 on error. For DTLS, whether or not the write
- * succeeds, the write buffer will be cleared. */
- int ssl_write_buffer_flush(SSL *ssl);
-
- /* ssl_write_buffer_clear releases all memory associated with the write buffer
- * and zero-initializes it. */
- void ssl_write_buffer_clear(SSL *ssl);
-
-
- /* Underdocumented functions.
- *
- * Functions below here haven't been touched up and may be underdocumented. */
-
- #define c2l(c, l) \
- (l = ((unsigned long)(*((c)++))), l |= (((unsigned long)(*((c)++))) << 8), \
- l |= (((unsigned long)(*((c)++))) << 16), \
- l |= (((unsigned long)(*((c)++))) << 24))
-
- /* NOTE - c is not incremented as per c2l */
- #define c2ln(c, l1, l2, n) \
- { \
- c += n; \
- l1 = l2 = 0; \
- switch (n) { \
- case 8: \
- l2 = ((unsigned long)(*(--(c)))) << 24; \
- case 7: \
- l2 |= ((unsigned long)(*(--(c)))) << 16; \
- case 6: \
- l2 |= ((unsigned long)(*(--(c)))) << 8; \
- case 5: \
- l2 |= ((unsigned long)(*(--(c)))); \
- case 4: \
- l1 = ((unsigned long)(*(--(c)))) << 24; \
- case 3: \
- l1 |= ((unsigned long)(*(--(c)))) << 16; \
- case 2: \
- l1 |= ((unsigned long)(*(--(c)))) << 8; \
- case 1: \
- l1 |= ((unsigned long)(*(--(c)))); \
- } \
- }
-
- #define l2c(l, c) \
- (*((c)++) = (uint8_t)(((l)) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 8) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 24) & 0xff))
-
- #define n2l(c, l) \
- (l = ((unsigned long)(*((c)++))) << 24, \
- l |= ((unsigned long)(*((c)++))) << 16, \
- l |= ((unsigned long)(*((c)++))) << 8, l |= ((unsigned long)(*((c)++))))
-
- #define l2n(l, c) \
- (*((c)++) = (uint8_t)(((l) >> 24) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 8) & 0xff), \
- *((c)++) = (uint8_t)(((l)) & 0xff))
-
- #define l2n8(l, c) \
- (*((c)++) = (uint8_t)(((l) >> 56) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 48) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 40) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 32) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 24) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 16) & 0xff), \
- *((c)++) = (uint8_t)(((l) >> 8) & 0xff), \
- *((c)++) = (uint8_t)(((l)) & 0xff))
-
- /* NOTE - c is not incremented as per l2c */
- #define l2cn(l1, l2, c, n) \
- { \
- c += n; \
- switch (n) { \
- case 8: \
- *(--(c)) = (uint8_t)(((l2) >> 24) & 0xff); \
- case 7: \
- *(--(c)) = (uint8_t)(((l2) >> 16) & 0xff); \
- case 6: \
- *(--(c)) = (uint8_t)(((l2) >> 8) & 0xff); \
- case 5: \
- *(--(c)) = (uint8_t)(((l2)) & 0xff); \
- case 4: \
- *(--(c)) = (uint8_t)(((l1) >> 24) & 0xff); \
- case 3: \
- *(--(c)) = (uint8_t)(((l1) >> 16) & 0xff); \
- case 2: \
- *(--(c)) = (uint8_t)(((l1) >> 8) & 0xff); \
- case 1: \
- *(--(c)) = (uint8_t)(((l1)) & 0xff); \
- } \
- }
-
- #define n2s(c, s) \
- ((s = (((unsigned int)(c[0])) << 8) | (((unsigned int)(c[1])))), c += 2)
-
- #define s2n(s, c) \
- ((c[0] = (uint8_t)(((s) >> 8) & 0xff), \
- c[1] = (uint8_t)(((s)) & 0xff)), \
- c += 2)
-
- #define n2l3(c, l) \
- ((l = (((unsigned long)(c[0])) << 16) | (((unsigned long)(c[1])) << 8) | \
- (((unsigned long)(c[2])))), \
- c += 3)
-
- #define l2n3(l, c) \
- ((c[0] = (uint8_t)(((l) >> 16) & 0xff), \
- c[1] = (uint8_t)(((l) >> 8) & 0xff), \
- c[2] = (uint8_t)(((l)) & 0xff)), \
- c += 3)
-
- /* LOCAL STUFF */
-
- #define TLSEXT_CHANNEL_ID_SIZE 128
-
- /* Check if an SSL structure is using DTLS */
- #define SSL_IS_DTLS(ssl) (ssl->method->is_dtls)
-
- /* From RFC4492, used in encoding the curve type in ECParameters */
- #define NAMED_CURVE_TYPE 3
-
- enum ssl_hash_message_t {
- ssl_dont_hash_message,
- ssl_hash_message,
- };
-
- /* Structure containing decoded values of signature algorithms extension */
- typedef struct tls_sigalgs_st {
- uint8_t rsign;
- uint8_t rhash;
- } TLS_SIGALGS;
-
- typedef struct cert_st {
- X509 *x509;
- EVP_PKEY *privatekey;
- /* Chain for this certificate */
- STACK_OF(X509) *chain;
-
- /* key_method, if non-NULL, is a set of callbacks to call for private key
- * operations. */
- const SSL_PRIVATE_KEY_METHOD *key_method;
-
- /* For clients the following masks are of *disabled* key and auth algorithms
- * based on the current configuration.
- *
- * TODO(davidben): Remove these. They get checked twice: when sending the
- * ClientHello and when processing the ServerHello. */
- uint32_t mask_k;
- uint32_t mask_a;
-
- DH *dh_tmp;
- DH *(*dh_tmp_cb)(SSL *ssl, int is_export, int keysize);
-
- /* peer_sigalgs are the algorithm/hash pairs that the peer supports. These
- * are taken from the contents of signature algorithms extension for a server
- * or from the CertificateRequest for a client. */
- TLS_SIGALGS *peer_sigalgs;
- /* peer_sigalgslen is the number of entries in |peer_sigalgs|. */
- size_t peer_sigalgslen;
-
- /* digest_nids, if non-NULL, is the set of digests supported by |privatekey|
- * in decreasing order of preference. */
- int *digest_nids;
- size_t num_digest_nids;
-
- /* Certificate setup callback: if set is called whenever a
- * certificate may be required (client or server). the callback
- * can then examine any appropriate parameters and setup any
- * certificates required. This allows advanced applications
- * to select certificates on the fly: for example based on
- * supported signature algorithms or curves. */
- int (*cert_cb)(SSL *ssl, void *arg);
- void *cert_cb_arg;
- } CERT;
-
- /* SSL_METHOD is a compatibility structure to support the legacy version-locked
- * methods. */
- struct ssl_method_st {
- /* version, if non-zero, is the only protocol version acceptable to an
- * SSL_CTX initialized from this method. */
- uint16_t version;
- /* method is the underlying SSL_PROTOCOL_METHOD that initializes the
- * SSL_CTX. */
- const SSL_PROTOCOL_METHOD *method;
- };
-
- /* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
- struct ssl_protocol_method_st {
- /* is_dtls is one if the protocol is DTLS and zero otherwise. */
- char is_dtls;
- int (*ssl_new)(SSL *ssl);
- void (*ssl_free)(SSL *ssl);
- int (*ssl_accept)(SSL *ssl);
- int (*ssl_connect)(SSL *ssl);
- long (*ssl_get_message)(SSL *ssl, int header_state, int body_state,
- int msg_type, long max,
- enum ssl_hash_message_t hash_message, int *ok);
- int (*ssl_read_app_data)(SSL *ssl, uint8_t *buf, int len, int peek);
- int (*ssl_read_change_cipher_spec)(SSL *ssl);
- void (*ssl_read_close_notify)(SSL *ssl);
- int (*ssl_write_app_data)(SSL *ssl, const void *buf_, int len);
- int (*ssl_dispatch_alert)(SSL *ssl);
- /* supports_cipher returns one if |cipher| is supported by this protocol and
- * zero otherwise. */
- int (*supports_cipher)(const SSL_CIPHER *cipher);
- /* Handshake header length */
- unsigned int hhlen;
- /* Set the handshake header */
- int (*set_handshake_header)(SSL *ssl, int type, unsigned long len);
- /* Write out handshake message */
- int (*do_write)(SSL *ssl);
- };
-
- /* This is for the SSLv3/TLSv1.0 differences in crypto/hash stuff It is a bit
- * of a mess of functions, but hell, think of it as an opaque structure. */
- struct ssl3_enc_method {
- /* prf computes the PRF function for |ssl|. It writes |out_len| bytes to
- * |out|, using |secret| as the secret and |label| as the label. |seed1| and
- * |seed2| are concatenated to form the seed parameter. It returns one on
- * success and zero on failure. */
- int (*prf)(const SSL *ssl, uint8_t *out, size_t out_len,
- const uint8_t *secret, size_t secret_len, const char *label,
- size_t label_len, const uint8_t *seed1, size_t seed1_len,
- const uint8_t *seed2, size_t seed2_len);
- int (*final_finish_mac)(SSL *ssl, int from_server, uint8_t *out);
- int (*cert_verify_mac)(SSL *, int, uint8_t *);
- };
-
- #define SSL_HM_HEADER_LENGTH(ssl) ssl->method->hhlen
- #define ssl_handshake_start(ssl) \
- (((uint8_t *)ssl->init_buf->data) + ssl->method->hhlen)
- #define ssl_set_handshake_header(ssl, htype, len) \
- ssl->method->set_handshake_header(ssl, htype, len)
- #define ssl_do_write(ssl) ssl->method->do_write(ssl)
-
- /* lengths of messages */
- #define DTLS1_COOKIE_LENGTH 256
-
- #define DTLS1_RT_HEADER_LENGTH 13
-
- #define DTLS1_HM_HEADER_LENGTH 12
-
- #define DTLS1_CCS_HEADER_LENGTH 1
-
- #define DTLS1_AL_HEADER_LENGTH 2
-
- /* TODO(davidben): This structure is used for both incoming messages and
- * outgoing messages. |is_ccs| and |epoch| are only used in the latter and
- * should be moved elsewhere. */
- struct hm_header_st {
- uint8_t type;
- uint32_t msg_len;
- uint16_t seq;
- uint32_t frag_off;
- uint32_t frag_len;
- int is_ccs;
- /* epoch, for buffered outgoing messages, is the epoch the message was
- * originally sent in. */
- uint16_t epoch;
- };
-
- /* TODO(davidben): This structure is used for both incoming messages and
- * outgoing messages. |fragment| and |reassembly| are only used in the former
- * and should be moved elsewhere. */
- typedef struct hm_fragment_st {
- struct hm_header_st msg_header;
- uint8_t *fragment;
- uint8_t *reassembly;
- } hm_fragment;
-
- typedef struct dtls1_state_st {
- /* send_cookie is true if we are resending the ClientHello
- * with a cookie from a HelloVerifyRequest. */
- unsigned int send_cookie;
-
- uint8_t cookie[DTLS1_COOKIE_LENGTH];
- size_t cookie_len;
-
- /* The current data and handshake epoch. This is initially undefined, and
- * starts at zero once the initial handshake is completed. */
- uint16_t r_epoch;
- uint16_t w_epoch;
-
- /* records being received in the current epoch */
- DTLS1_BITMAP bitmap;
-
- /* handshake message numbers.
- * TODO(davidben): It doesn't make much sense to store both of these. Only
- * store one. */
- uint16_t handshake_write_seq;
- uint16_t next_handshake_write_seq;
-
- uint16_t handshake_read_seq;
-
- /* save last sequence number for retransmissions */
- uint8_t last_write_sequence[8];
-
- /* buffered_messages is a priority queue of incoming handshake messages that
- * have yet to be processed.
- *
- * TODO(davidben): This data structure may as well be a ring buffer of fixed
- * size. */
- pqueue buffered_messages;
-
- /* send_messages is a priority queue of outgoing handshake messages sent in
- * the most recent handshake flight.
- *
- * TODO(davidben): This data structure may as well be a STACK_OF(T). */
- pqueue sent_messages;
-
- unsigned int mtu; /* max DTLS packet size */
-
- struct hm_header_st w_msg_hdr;
-
- /* num_timeouts is the number of times the retransmit timer has fired since
- * the last time it was reset. */
- unsigned int num_timeouts;
-
- /* Indicates when the last handshake msg or heartbeat sent will
- * timeout. */
- struct timeval next_timeout;
-
- /* Timeout duration */
- unsigned short timeout_duration;
- } DTLS1_STATE;
-
- extern const SSL3_ENC_METHOD TLSv1_enc_data;
- extern const SSL3_ENC_METHOD SSLv3_enc_data;
- extern const SRTP_PROTECTION_PROFILE kSRTPProfiles[];
-
- int ssl_clear_bad_session(SSL *ssl);
- CERT *ssl_cert_new(void);
- CERT *ssl_cert_dup(CERT *cert);
- void ssl_cert_clear_certs(CERT *c);
- void ssl_cert_free(CERT *c);
- int ssl_get_new_session(SSL *ssl, int is_server);
-
- enum ssl_session_result_t {
- ssl_session_success,
- ssl_session_error,
- ssl_session_retry,
- };
-
- /* ssl_get_prev_session looks up the previous session based on |ctx|. On
- * success, it sets |*out_session| to the session or NULL if none was found. It
- * sets |*out_send_ticket| to whether a ticket should be sent at the end of the
- * handshake. If the session could not be looked up synchronously, it returns
- * |ssl_session_retry| and should be called again. Otherwise, it returns
- * |ssl_session_error|. */
- enum ssl_session_result_t ssl_get_prev_session(
- SSL *ssl, SSL_SESSION **out_session, int *out_send_ticket,
- const struct ssl_early_callback_ctx *ctx);
-
- STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *ssl, const CBS *cbs);
- void ssl_cipher_preference_list_free(
- struct ssl_cipher_preference_list_st *cipher_list);
- struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *ssl);
-
- int ssl_cert_set0_chain(CERT *cert, STACK_OF(X509) *chain);
- int ssl_cert_set1_chain(CERT *cert, STACK_OF(X509) *chain);
- int ssl_cert_add0_chain_cert(CERT *cert, X509 *x509);
- int ssl_cert_add1_chain_cert(CERT *cert, X509 *x509);
- void ssl_cert_set_cert_cb(CERT *cert,
- int (*cb)(SSL *ssl, void *arg), void *arg);
-
- int ssl_verify_cert_chain(SSL *ssl, STACK_OF(X509) *cert_chain);
- int ssl_add_cert_chain(SSL *ssl, unsigned long *l);
- void ssl_update_cache(SSL *ssl, int mode);
-
- /* ssl_get_compatible_server_ciphers determines the key exchange and
- * authentication cipher suite masks compatible with the server configuration
- * and current ClientHello parameters of |ssl|. It sets |*out_mask_k| to the key
- * exchange mask and |*out_mask_a| to the authentication mask. */
- void ssl_get_compatible_server_ciphers(SSL *ssl, uint32_t *out_mask_k,
- uint32_t *out_mask_a);
-
- STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *ssl);
- int ssl_verify_alarm_type(long type);
-
- /* ssl_fill_hello_random fills a client_random or server_random field of length
- * |len|. It returns one on success and zero on failure. */
- int ssl_fill_hello_random(uint8_t *out, size_t len, int is_server);
-
- int ssl3_send_server_certificate(SSL *ssl);
- int ssl3_send_new_session_ticket(SSL *ssl);
- int ssl3_send_certificate_status(SSL *ssl);
- int ssl3_get_finished(SSL *ssl, int state_a, int state_b);
- int ssl3_send_change_cipher_spec(SSL *ssl, int state_a, int state_b);
- void ssl3_cleanup_key_block(SSL *ssl);
- int ssl3_do_write(SSL *ssl, int type);
- int ssl3_send_alert(SSL *ssl, int level, int desc);
- int ssl3_get_req_cert_type(SSL *ssl, uint8_t *p);
- long ssl3_get_message(SSL *ssl, int header_state, int body_state, int msg_type,
- long max, enum ssl_hash_message_t hash_message, int *ok);
-
- /* ssl3_hash_current_message incorporates the current handshake message into the
- * handshake hash. It returns one on success and zero on allocation failure. */
- int ssl3_hash_current_message(SSL *ssl);
-
- /* ssl3_cert_verify_hash writes the CertificateVerify hash into the bytes
- * pointed to by |out| and writes the number of bytes to |*out_len|. |out| must
- * have room for EVP_MAX_MD_SIZE bytes. For TLS 1.2 and up, |*out_md| is used
- * for the hash function, otherwise the hash function depends on |pkey_type|
- * and is written to |*out_md|. It returns one on success and zero on
- * failure. */
- int ssl3_cert_verify_hash(SSL *ssl, uint8_t *out, size_t *out_len,
- const EVP_MD **out_md, int pkey_type);
-
- int ssl3_send_finished(SSL *ssl, int a, int b);
- int ssl3_supports_cipher(const SSL_CIPHER *cipher);
- int ssl3_dispatch_alert(SSL *ssl);
- int ssl3_read_app_data(SSL *ssl, uint8_t *buf, int len, int peek);
- int ssl3_read_change_cipher_spec(SSL *ssl);
- void ssl3_read_close_notify(SSL *ssl);
- int ssl3_read_bytes(SSL *ssl, int type, uint8_t *buf, int len, int peek);
- int ssl3_write_app_data(SSL *ssl, const void *buf, int len);
- int ssl3_write_bytes(SSL *ssl, int type, const void *buf, int len);
- int ssl3_output_cert_chain(SSL *ssl);
- const SSL_CIPHER *ssl3_choose_cipher(
- SSL *ssl, STACK_OF(SSL_CIPHER) *clnt,
- struct ssl_cipher_preference_list_st *srvr);
-
- int ssl3_new(SSL *ssl);
- void ssl3_free(SSL *ssl);
- int ssl3_accept(SSL *ssl);
- int ssl3_connect(SSL *ssl);
-
- int ssl3_set_handshake_header(SSL *ssl, int htype, unsigned long len);
- int ssl3_handshake_write(SSL *ssl);
-
- int dtls1_do_handshake_write(SSL *ssl, enum dtls1_use_epoch_t use_epoch);
- int dtls1_read_app_data(SSL *ssl, uint8_t *buf, int len, int peek);
- int dtls1_read_change_cipher_spec(SSL *ssl);
- void dtls1_read_close_notify(SSL *ssl);
- int dtls1_read_bytes(SSL *ssl, int type, uint8_t *buf, int len, int peek);
- void dtls1_set_message_header(SSL *ssl, uint8_t mt, unsigned long len,
- unsigned short seq_num, unsigned long frag_off,
- unsigned long frag_len);
-
- int dtls1_write_app_data(SSL *ssl, const void *buf, int len);
- int dtls1_write_bytes(SSL *ssl, int type, const void *buf, int len,
- enum dtls1_use_epoch_t use_epoch);
-
- int dtls1_send_change_cipher_spec(SSL *ssl, int a, int b);
- int dtls1_send_finished(SSL *ssl, int a, int b, const char *sender, int slen);
- int dtls1_read_failed(SSL *ssl, int code);
- int dtls1_buffer_message(SSL *ssl);
- int dtls1_retransmit_buffered_messages(SSL *ssl);
- void dtls1_clear_record_buffer(SSL *ssl);
- void dtls1_get_message_header(uint8_t *data, struct hm_header_st *msg_hdr);
- int dtls1_check_timeout_num(SSL *ssl);
- int dtls1_set_handshake_header(SSL *ssl, int type, unsigned long len);
- int dtls1_handshake_write(SSL *ssl);
-
- int dtls1_supports_cipher(const SSL_CIPHER *cipher);
- void dtls1_start_timer(SSL *ssl);
- void dtls1_stop_timer(SSL *ssl);
- int dtls1_is_timer_expired(SSL *ssl);
- void dtls1_double_timeout(SSL *ssl);
- unsigned int dtls1_min_mtu(void);
- void dtls1_hm_fragment_free(hm_fragment *frag);
-
- /* some client-only functions */
- int ssl3_send_client_hello(SSL *ssl);
- int ssl3_get_server_hello(SSL *ssl);
- int ssl3_get_certificate_request(SSL *ssl);
- int ssl3_get_new_session_ticket(SSL *ssl);
- int ssl3_get_cert_status(SSL *ssl);
- int ssl3_get_server_done(SSL *ssl);
- int ssl3_send_cert_verify(SSL *ssl);
- int ssl3_send_client_certificate(SSL *ssl);
- int ssl_do_client_cert_cb(SSL *ssl, X509 **px509, EVP_PKEY **ppkey);
- int ssl3_send_client_key_exchange(SSL *ssl);
- int ssl3_get_server_key_exchange(SSL *ssl);
- int ssl3_get_server_certificate(SSL *ssl);
- int ssl3_send_next_proto(SSL *ssl);
- int ssl3_send_channel_id(SSL *ssl);
- int ssl3_verify_server_cert(SSL *ssl);
-
- /* some server-only functions */
- int ssl3_get_initial_bytes(SSL *ssl);
- int ssl3_get_v2_client_hello(SSL *ssl);
- int ssl3_get_client_hello(SSL *ssl);
- int ssl3_send_server_hello(SSL *ssl);
- int ssl3_send_server_key_exchange(SSL *ssl);
- int ssl3_send_certificate_request(SSL *ssl);
- int ssl3_send_server_done(SSL *ssl);
- int ssl3_get_client_certificate(SSL *ssl);
- int ssl3_get_client_key_exchange(SSL *ssl);
- int ssl3_get_cert_verify(SSL *ssl);
- int ssl3_get_next_proto(SSL *ssl);
- int ssl3_get_channel_id(SSL *ssl);
-
- int dtls1_new(SSL *ssl);
- int dtls1_accept(SSL *ssl);
- int dtls1_connect(SSL *ssl);
- void dtls1_free(SSL *ssl);
-
- long dtls1_get_message(SSL *ssl, int st1, int stn, int mt, long max,
- enum ssl_hash_message_t hash_message, int *ok);
- int dtls1_dispatch_alert(SSL *ssl);
-
- int ssl_init_wbio_buffer(SSL *ssl, int push);
- void ssl_free_wbio_buffer(SSL *ssl);
-
- int tls1_change_cipher_state(SSL *ssl, int which);
- int tls1_setup_key_block(SSL *ssl);
- int tls1_handshake_digest(SSL *ssl, uint8_t *out, size_t out_len);
- int tls1_generate_master_secret(SSL *ssl, uint8_t *out, const uint8_t *premaster,
- size_t premaster_len);
-
- char ssl_early_callback_init(struct ssl_early_callback_ctx *ctx);
-
- /* tls1_check_curve_id returns one if |curve_id| is consistent with both our
- * and the peer's curve preferences. Note: if called as the client, only our
- * preferences are checked; the peer (the server) does not send preferences. */
- int tls1_check_curve_id(SSL *ssl, uint16_t curve_id);
-
- /* tls1_get_shared_curve sets |*out_curve_id| to the first preferred shared
- * curve between client and server preferences and returns one. If none may be
- * found, it returns zero. */
- int tls1_get_shared_curve(SSL *ssl, uint16_t *out_curve_id);
-
- /* tls1_set_curves converts the array of |ncurves| NIDs pointed to by |curves|
- * into a newly allocated array of TLS curve IDs. On success, the function
- * returns one and writes the array to |*out_curve_ids| and its size to
- * |*out_curve_ids_len|. Otherwise, it returns zero. */
- int tls1_set_curves(uint16_t **out_curve_ids, size_t *out_curve_ids_len,
- const int *curves, size_t ncurves);
-
- /* tls1_check_ec_cert returns one if |x| is an ECC certificate with curve and
- * point format compatible with the client's preferences. Otherwise it returns
- * zero. */
- int tls1_check_ec_cert(SSL *ssl, X509 *x);
-
- /* ssl_add_clienthello_tlsext writes ClientHello extensions to |out|. It
- * returns one on success and zero on failure. The |header_len| argument is the
- * length of the ClientHello written so far and is used to compute the padding
- * length. (It does not include the record header.) */
- int ssl_add_clienthello_tlsext(SSL *ssl, CBB *out, size_t header_len);
-
- int ssl_add_serverhello_tlsext(SSL *ssl, CBB *out);
- int ssl_parse_clienthello_tlsext(SSL *ssl, CBS *cbs);
- int ssl_parse_serverhello_tlsext(SSL *ssl, CBS *cbs);
-
- #define tlsext_tick_md EVP_sha256
-
- /* tls_process_ticket processes a session ticket from the client. On success,
- * it sets |*out_session| to the decrypted session or NULL if the ticket was
- * rejected. If the ticket was valid, it sets |*out_renew_ticket| to whether
- * the ticket should be renewed. It returns one on success and zero on fatal
- * error. */
- int tls_process_ticket(SSL *ssl, SSL_SESSION **out_session,
- int *out_renew_ticket, const uint8_t *ticket,
- size_t ticket_len, const uint8_t *session_id,
- size_t session_id_len);
-
- /* tls12_add_sigandhash assembles the SignatureAndHashAlgorithm corresponding to
- * |ssl|'s private key and |md|. The two-byte value is written to |out|. It
- * returns one on success and zero on failure. */
- int tls12_add_sigandhash(SSL *ssl, CBB *out, const EVP_MD *md);
-
- int tls12_get_sigid(int pkey_type);
- const EVP_MD *tls12_get_hash(uint8_t hash_alg);
-
- /* tls1_channel_id_hash computes the hash to be signed by Channel ID and writes
- * it to |out|, which must contain at least |EVP_MAX_MD_SIZE| bytes. It returns
- * one on success and zero on failure. */
- int tls1_channel_id_hash(SSL *ssl, uint8_t *out, size_t *out_len);
-
- int tls1_record_handshake_hashes_for_channel_id(SSL *ssl);
-
- /* ssl_log_rsa_client_key_exchange logs |premaster|, if logging is enabled for
- * |ssl|. It returns one on success and zero on failure. The entry is identified
- * by the first 8 bytes of |encrypted_premaster|. */
- int ssl_log_rsa_client_key_exchange(const SSL *ssl,
- const uint8_t *encrypted_premaster,
- size_t encrypted_premaster_len,
- const uint8_t *premaster,
- size_t premaster_len);
-
- /* ssl_log_master_secret logs |master|, if logging is enabled for |ssl|. It
- * returns one on success and zero on failure. The entry is identified by
- * |client_random|. */
- int ssl_log_master_secret(const SSL *ssl, const uint8_t *client_random,
- size_t client_random_len, const uint8_t *master,
- size_t master_len);
-
- /* ssl3_can_false_start returns one if |ssl| is allowed to False Start and zero
- * otherwise. */
- int ssl3_can_false_start(const SSL *ssl);
-
- /* ssl3_get_enc_method returns the SSL3_ENC_METHOD corresponding to
- * |version|. */
- const SSL3_ENC_METHOD *ssl3_get_enc_method(uint16_t version);
-
- /* ssl3_get_max_server_version returns the maximum SSL/TLS version number
- * supported by |ssl| as a server, or zero if all versions are disabled. */
- uint16_t ssl3_get_max_server_version(const SSL *ssl);
-
- /* ssl3_get_mutual_version selects the protocol version on |ssl| for a client
- * which advertises |client_version|. If no suitable version exists, it returns
- * zero. */
- uint16_t ssl3_get_mutual_version(SSL *ssl, uint16_t client_version);
-
- /* ssl3_get_max_client_version returns the maximum protocol version configured
- * for the client. It is guaranteed that the set of allowed versions at or below
- * this maximum version is contiguous. If all versions are disabled, it returns
- * zero. */
- uint16_t ssl3_get_max_client_version(SSL *ssl);
-
- /* ssl3_is_version_enabled returns one if |version| is an enabled protocol
- * version for |ssl| and zero otherwise. */
- int ssl3_is_version_enabled(SSL *ssl, uint16_t version);
-
- /* ssl3_version_from_wire maps |wire_version| to a protocol version. For
- * SSLv3/TLS, the version is returned as-is. For DTLS, the corresponding TLS
- * version is used. Note that this mapping is not injective but preserves
- * comparisons.
- *
- * TODO(davidben): To normalize some DTLS-specific code, move away from using
- * the wire version except at API boundaries. */
- uint16_t ssl3_version_from_wire(const SSL *ssl, uint16_t wire_version);
-
- /* ssl3_protocol_version returns |ssl|'s protocol version. It is an error to
- * call this function before the version is determined. */
- uint16_t ssl3_protocol_version(const SSL *ssl);
-
- uint32_t ssl_get_algorithm_prf(const SSL *ssl);
- int tls1_parse_peer_sigalgs(SSL *ssl, const CBS *sigalgs);
-
- /* tls1_choose_signing_digest returns a digest for use with |ssl|'s private key
- * based on the peer's preferences the digests supported. */
- const EVP_MD *tls1_choose_signing_digest(SSL *ssl);
-
- size_t tls12_get_psigalgs(SSL *ssl, const uint8_t **psigs);
-
- /* tls12_check_peer_sigalg checks that |hash| and |signature| are consistent
- * with |pkey| and |ssl|'s sent, supported signature algorithms and, if so,
- * writes the relevant digest into |*out_md| and returns 1. Otherwise it
- * returns 0 and writes an alert into |*out_alert|. */
- int tls12_check_peer_sigalg(SSL *ssl, const EVP_MD **out_md, int *out_alert,
- uint8_t hash, uint8_t signature, EVP_PKEY *pkey);
- void ssl_set_client_disabled(SSL *ssl);
-
- #endif /* OPENSSL_HEADER_SSL_INTERNAL_H */
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