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boringssl/include/openssl/ssl3.h
David Benjamin 4414874f1f Simplify ssl_private_key_* state machine points. 
The original motivation behind the sign/complete split was to avoid
needlessly hashing the input on each pass through the state machine, but
we're payload-based now and, in all cases, the payload is either cheap
to compute or readily available. (Even the hashing worry was probably
unnecessary.)

Tweak ssl_private_key_{sign,decrypt} to automatically call
ssl_private_key_complete as needed and take advantage of this in the
handshake state machines:

- TLS 1.3 signing now computes the payload each pass. The payload is
  small and we're already allocating a comparable-sized buffer each
  iteration to hold the signature. This shouldn't be a big deal.

- TLS 1.2 decryption code still needs two states due to reading the
  message (fixed in new state machine style), but otherwise it just
  performs cheap idempotent tasks again. The PSK code is reshuffled to
  guarantee the callback is not called twice (though this was impossible
  anyway because we don't support RSA_PSK).

- TLS 1.2 CertificateVerify signing is easy as the transcript is readily
  available. The buffer is released very slightly later, but it
  shouldn't matter.

- TLS 1.2 ServerKeyExchange signing required some reshuffling.
  Assembling the ServerKeyExchange parameters is moved to the previous
  state. The signing payload has some randoms prepended. This is cheap
  enough, but a nuisance in C. Pre-prepend the randoms in
  hs->server_params.

With this change, we are *nearly* rid of the A/B => same function
pattern.

BUG=128

Change-Id: Iec4fe0be7cfc88a6de027ba2760fae70794ea810
Reviewed-on: https://boringssl-review.googlesource.com/17265
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
2017-06-20 19:37:05 +00:00

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/* ssl/ssl3.h */
/* 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) 1998-2002 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.
*/
#ifndef OPENSSL_HEADER_SSL3_H
#define OPENSSL_HEADER_SSL3_H
#include <openssl/aead.h>
#include <openssl/type_check.h>
#ifdef __cplusplus
extern "C" {
#endif
/* These are kept to support clients that negotiates higher protocol versions
* using SSLv2 client hello records. */
#define SSL2_MT_CLIENT_HELLO 1
#define SSL2_VERSION 0x0002
/* Signalling cipher suite value from RFC 5746. */
#define SSL3_CK_SCSV 0x030000FF
/* Fallback signalling cipher suite value from RFC 7507. */
#define SSL3_CK_FALLBACK_SCSV 0x03005600
#define SSL3_CK_RSA_NULL_MD5 0x03000001
#define SSL3_CK_RSA_NULL_SHA 0x03000002
#define SSL3_CK_RSA_RC4_40_MD5 0x03000003
#define SSL3_CK_RSA_RC4_128_MD5 0x03000004
#define SSL3_CK_RSA_RC4_128_SHA 0x03000005
#define SSL3_CK_RSA_RC2_40_MD5 0x03000006
#define SSL3_CK_RSA_IDEA_128_SHA 0x03000007
#define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008
#define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009
#define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A
#define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B
#define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C
#define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D
#define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E
#define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F
#define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010
#define SSL3_CK_EDH_DSS_DES_40_CBC_SHA 0x03000011
#define SSL3_CK_EDH_DSS_DES_64_CBC_SHA 0x03000012
#define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA 0x03000013
#define SSL3_CK_EDH_RSA_DES_40_CBC_SHA 0x03000014
#define SSL3_CK_EDH_RSA_DES_64_CBC_SHA 0x03000015
#define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA 0x03000016
#define SSL3_CK_ADH_RC4_40_MD5 0x03000017
#define SSL3_CK_ADH_RC4_128_MD5 0x03000018
#define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019
#define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A
#define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B
#define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5"
#define SSL3_TXT_RSA_NULL_SHA "NULL-SHA"
#define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5"
#define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5"
#define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA"
#define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5"
#define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA"
#define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA"
#define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA"
#define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA"
#define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA"
#define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA"
#define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA"
#define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA"
#define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA"
#define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA"
#define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA"
#define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA"
#define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA"
#define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA"
#define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA"
#define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA"
#define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5"
#define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5"
#define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA"
#define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA"
#define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA"
#define SSL3_SSL_SESSION_ID_LENGTH 32
#define SSL3_MAX_SSL_SESSION_ID_LENGTH 32
#define SSL3_MASTER_SECRET_SIZE 48
#define SSL3_RANDOM_SIZE 32
#define SSL3_SESSION_ID_SIZE 32
#define SSL3_RT_HEADER_LENGTH 5
#define SSL3_HM_HEADER_LENGTH 4
#ifndef SSL3_ALIGN_PAYLOAD
/* Some will argue that this increases memory footprint, but it's not actually
* true. Point is that malloc has to return at least 64-bit aligned pointers,
* meaning that allocating 5 bytes wastes 3 bytes in either case. Suggested
* pre-gaping simply moves these wasted bytes from the end of allocated region
* to its front, but makes data payload aligned, which improves performance. */
#define SSL3_ALIGN_PAYLOAD 8
#else
#if (SSL3_ALIGN_PAYLOAD & (SSL3_ALIGN_PAYLOAD - 1)) != 0
#error "insane SSL3_ALIGN_PAYLOAD"
#undef SSL3_ALIGN_PAYLOAD
#endif
#endif
/* This is the maximum MAC (digest) size used by the SSL library. Currently
* maximum of 20 is used by SHA1, but we reserve for future extension for
* 512-bit hashes. */
#define SSL3_RT_MAX_MD_SIZE 64
/* Maximum block size used in all ciphersuites. Currently 16 for AES. */
#define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
/* Maximum plaintext length: defined by SSL/TLS standards */
#define SSL3_RT_MAX_PLAIN_LENGTH 16384
/* Maximum compression overhead: defined by SSL/TLS standards */
#define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
/* The standards give a maximum encryption overhead of 1024 bytes. In practice
* the value is lower than this. The overhead is the maximum number of padding
* bytes (256) plus the mac size.
*
* TODO(davidben): This derivation doesn't take AEADs into account, or TLS 1.1
* explicit nonces. It happens to work because |SSL3_RT_MAX_MD_SIZE| is larger
* than necessary and no true AEAD has variable overhead in TLS 1.2. */
#define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
/* SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD is the maximum overhead in encrypting a
* record. This does not include the record header. Some ciphers use explicit
* nonces, so it includes both the AEAD overhead as well as the nonce. */
#define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
(EVP_AEAD_MAX_OVERHEAD + EVP_AEAD_MAX_NONCE_LENGTH)
OPENSSL_COMPILE_ASSERT(
SSL3_RT_MAX_ENCRYPTED_OVERHEAD >= SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD,
max_overheads_are_consistent);
/* SSL3_RT_MAX_COMPRESSED_LENGTH is an alias for
* |SSL3_RT_MAX_PLAIN_LENGTH|. Compression is gone, so don't include the
* compression overhead. */
#define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH
#define SSL3_RT_MAX_ENCRYPTED_LENGTH \
(SSL3_RT_MAX_ENCRYPTED_OVERHEAD + SSL3_RT_MAX_COMPRESSED_LENGTH)
#define SSL3_RT_MAX_PACKET_SIZE \
(SSL3_RT_MAX_ENCRYPTED_LENGTH + SSL3_RT_HEADER_LENGTH)
#define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
#define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
#define SSL3_RT_CHANGE_CIPHER_SPEC 20
#define SSL3_RT_ALERT 21
#define SSL3_RT_HANDSHAKE 22
#define SSL3_RT_APPLICATION_DATA 23
/* Pseudo content type for SSL/TLS header info */
#define SSL3_RT_HEADER 0x100
#define SSL3_AL_WARNING 1
#define SSL3_AL_FATAL 2
#define SSL3_AD_CLOSE_NOTIFY 0
#define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
#define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
#define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
#define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
#define SSL3_AD_NO_CERTIFICATE 41
#define SSL3_AD_BAD_CERTIFICATE 42
#define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
#define SSL3_AD_CERTIFICATE_REVOKED 44
#define SSL3_AD_CERTIFICATE_EXPIRED 45
#define SSL3_AD_CERTIFICATE_UNKNOWN 46
#define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
#define SSL3_AD_INAPPROPRIATE_FALLBACK 86 /* fatal */
#define SSL3_CT_RSA_SIGN 1
/* SSLv3 */
/* client */
/* extra state */
#define SSL3_ST_CW_FLUSH (0x100 | SSL_ST_CONNECT)
#define SSL3_ST_FALSE_START (0x101 | SSL_ST_CONNECT)
#define SSL3_ST_VERIFY_SERVER_CERT (0x102 | SSL_ST_CONNECT)
#define SSL3_ST_FINISH_CLIENT_HANDSHAKE (0x103 | SSL_ST_CONNECT)
#define SSL3_ST_WRITE_EARLY_DATA (0x104 | SSL_ST_CONNECT)
/* write to server */
#define SSL3_ST_CW_CLNT_HELLO_A (0x110 | SSL_ST_CONNECT)
/* read from server */
#define SSL3_ST_CR_SRVR_HELLO_A (0x120 | SSL_ST_CONNECT)
#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126 | SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_A (0x130 | SSL_ST_CONNECT)
#define SSL3_ST_CR_KEY_EXCH_A (0x140 | SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_REQ_A (0x150 | SSL_ST_CONNECT)
#define SSL3_ST_CR_SRVR_DONE_A (0x160 | SSL_ST_CONNECT)
/* write to server */
#define SSL3_ST_CW_CERT_A (0x170 | SSL_ST_CONNECT)
#define SSL3_ST_CW_KEY_EXCH_A (0x180 | SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_VRFY_A (0x190 | SSL_ST_CONNECT)
#define SSL3_ST_CW_CHANGE (0x1A0 | SSL_ST_CONNECT)
#define SSL3_ST_CW_NEXT_PROTO_A (0x200 | SSL_ST_CONNECT)
#define SSL3_ST_CW_CHANNEL_ID_A (0x220 | SSL_ST_CONNECT)
#define SSL3_ST_CW_FINISHED_A (0x1B0 | SSL_ST_CONNECT)
/* read from server */
#define SSL3_ST_CR_CHANGE (0x1C0 | SSL_ST_CONNECT)
#define SSL3_ST_CR_FINISHED_A (0x1D0 | SSL_ST_CONNECT)
#define SSL3_ST_CR_SESSION_TICKET_A (0x1E0 | SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_STATUS_A (0x1F0 | SSL_ST_CONNECT)
/* SSL3_ST_CR_SRVR_HELLO_B is a legacy alias for |SSL3_ST_CR_SRVR_HELLO_A| used
* by some consumers which check |SSL_state|. */
#define SSL3_ST_CR_SRVR_HELLO_B SSL3_ST_CR_SRVR_HELLO_A
/* server */
/* extra state */
#define SSL3_ST_SW_FLUSH (0x100 | SSL_ST_ACCEPT)
/* read from client */
#define SSL3_ST_SR_CLNT_HELLO_A (0x110 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CLNT_HELLO_B (0x111 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CLNT_HELLO_C (0x112 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CLNT_HELLO_D (0x113 | SSL_ST_ACCEPT)
/* write to client */
#define SSL3_ST_SW_SRVR_HELLO_A (0x130 | SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_A (0x140 | SSL_ST_ACCEPT)
#define SSL3_ST_SW_KEY_EXCH_A (0x150 | SSL_ST_ACCEPT)
#define SSL3_ST_SW_SRVR_DONE_A (0x170 | SSL_ST_ACCEPT)
/* read from client */
#define SSL3_ST_SR_CERT_A (0x180 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_KEY_EXCH_A (0x190 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_KEY_EXCH_B (0x191 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CERT_VRFY_A (0x1A0 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CHANGE (0x1B0 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_NEXT_PROTO_A (0x210 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_CHANNEL_ID_A (0x230 | SSL_ST_ACCEPT)
#define SSL3_ST_SR_FINISHED_A (0x1C0 | SSL_ST_ACCEPT)
/* write to client */
#define SSL3_ST_SW_FINISHED_A (0x1E0 | SSL_ST_ACCEPT)
#define SSL3_MT_HELLO_REQUEST 0
#define SSL3_MT_CLIENT_HELLO 1
#define SSL3_MT_SERVER_HELLO 2
#define SSL3_MT_NEW_SESSION_TICKET 4
#define SSL3_MT_HELLO_RETRY_REQUEST 6
#define SSL3_MT_ENCRYPTED_EXTENSIONS 8
#define SSL3_MT_CERTIFICATE 11
#define SSL3_MT_SERVER_KEY_EXCHANGE 12
#define SSL3_MT_CERTIFICATE_REQUEST 13
#define SSL3_MT_SERVER_HELLO_DONE 14
#define SSL3_MT_CERTIFICATE_VERIFY 15
#define SSL3_MT_CLIENT_KEY_EXCHANGE 16
#define SSL3_MT_FINISHED 20
#define SSL3_MT_CERTIFICATE_STATUS 22
#define SSL3_MT_SUPPLEMENTAL_DATA 23
#define SSL3_MT_KEY_UPDATE 24
#define SSL3_MT_NEXT_PROTO 67
#define SSL3_MT_CHANNEL_ID 203
#define DTLS1_MT_HELLO_VERIFY_REQUEST 3
/* The following are legacy aliases for consumers which use
* |SSL_CTX_set_msg_callback|. */
#define SSL3_MT_SERVER_DONE SSL3_MT_SERVER_HELLO_DONE
#define SSL3_MT_NEWSESSION_TICKET SSL3_MT_NEW_SESSION_TICKET
#define SSL3_MT_CCS 1
/* These are used when changing over to a new cipher */
#define SSL3_CC_READ 0x01
#define SSL3_CC_WRITE 0x02
#define SSL3_CC_CLIENT 0x10
#define SSL3_CC_SERVER 0x20
#define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT | SSL3_CC_WRITE)
#define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER | SSL3_CC_READ)
#define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT | SSL3_CC_READ)
#define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER | SSL3_CC_WRITE)
#ifdef __cplusplus
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_SSL3_H */
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