- /* 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/types.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 0x00000040L
-
- #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_ssl| (protocol version). These denote the first protocol
- * version which introduced the cipher.
- *
- * TODO(davidben): These are extremely confusing, both in code and in
- * cipher rules. Try to remove them. */
- #define SSL_SSLV3 0x00000002L
- #define SSL_TLSV1 SSL_SSLV3
- #define SSL_TLSV1_2 0x00000004L
-
- /* 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
-
- /* Bits for |algo_strength|, cipher strength information. */
- #define SSL_MEDIUM 0x00000001L
- #define SSL_HIGH 0x00000002L
- #define SSL_FIPS 0x00000004L
-
- /* 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, some ciphers take optional
- * ServerKeyExchanges. PSK and RSA_PSK only use the ServerKeyExchange to
- * communicate a psk_identity_hint, so it is optional. */
- int ssl_cipher_requires_server_key_exchange(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[8];
- 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;
- } /* 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;
-
-
- /* 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);
-
- int ssl_private_key_supports_digest(SSL *ssl, const EVP_MD *md);
-
- 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);
-
-
- /* 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 *s);
-
- /* 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);
-
-
- /* 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(s) (s->method->is_dtls)
- /* See if we need explicit IV */
- #define SSL_USE_EXPLICIT_IV(s) \
- (s->enc_method->enc_flags & SSL_ENC_FLAG_EXPLICIT_IV)
- /* See if we use signature algorithms extension and signature algorithm before
- * signatures. */
- #define SSL_USE_SIGALGS(s) (s->enc_method->enc_flags & SSL_ENC_FLAG_SIGALGS)
- /* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2: may
- * apply to others in future. */
- #define SSL_USE_TLS1_2_CIPHERS(s) \
- (s->enc_method->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)
- /* Determine if a client can use TLS 1.2 ciphersuites: can't rely on method
- * flags because it may not be set to correct version yet. */
- #define SSL_CLIENT_USE_TLS1_2_CIPHERS(s) \
- ((SSL_IS_DTLS(s) && s->client_version <= DTLS1_2_VERSION) || \
- (!SSL_IS_DTLS(s) && s->client_version >= TLS1_2_VERSION))
-
- /* SSL_kRSA <- RSA_ENC | (RSA_TMP & RSA_SIGN) |
- * <- (EXPORT & (RSA_ENC | RSA_TMP) & RSA_SIGN)
- * SSL_kDH <- DH_ENC & (RSA_ENC | RSA_SIGN | DSA_SIGN)
- * SSL_kDHE <- RSA_ENC | RSA_SIGN | DSA_SIGN
- * SSL_aRSA <- RSA_ENC | RSA_SIGN
- * SSL_aDSS <- DSA_SIGN */
-
- /* From RFC4492, used in encoding the curve type in ECParameters */
- #define EXPLICIT_PRIME_CURVE_TYPE 1
- #define EXPLICIT_CHAR2_CURVE_TYPE 2
- #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 session.
- *
- * TODO(davidben): Remove these. They get checked twice: when sending the
- * ClientHello and when processing the ServerHello. However, mask_ssl is a
- * different value both times. mask_k and mask_a are not, but is a
- * round-about way of checking the server's cipher was one of the advertised
- * ones. (Currently it checks the masks and then the list of ciphers prior to
- * applying the masks in ClientHello.) */
- uint32_t mask_k;
- uint32_t mask_a;
- uint32_t mask_ssl;
-
- DH *dh_tmp;
- DH *(*dh_tmp_cb)(SSL *ssl, int is_export, int keysize);
-
- /* ecdh_nid, if not |NID_undef|, is the NID of the curve to use for ephemeral
- * ECDH keys. If unset, |ecdh_tmp_cb| is consulted. */
- int ecdh_nid;
- /* ecdh_tmp_cb is a callback for selecting the curve to use for ephemeral ECDH
- * keys. If NULL, a curve is selected automatically. See
- * |SSL_CTX_set_tmp_ecdh_callback|. */
- EC_KEY *(*ecdh_tmp_cb)(SSL *ssl, int is_export, int keysize);
-
- /* Server-only: client_certificate_types is list of certificate types to
- * include in the CertificateRequest message.
- */
- uint8_t *client_certificate_types;
- size_t num_client_certificate_types;
-
- /* signature algorithms peer reports: e.g. supported signature
- * algorithms extension for server or as part of a certificate
- * request for client. */
- uint8_t *peer_sigalgs;
- /* Size of above array */
- size_t peer_sigalgslen;
- /* suppported signature algorithms.
- * When set on a client this is sent in the client hello as the
- * supported signature algorithms extension. For servers
- * it represents the signature algorithms we are willing to use. */
- uint8_t *conf_sigalgs;
- /* Size of above array */
- size_t conf_sigalgslen;
- /* Client authentication signature algorithms, if not set then
- * uses conf_sigalgs. On servers these will be the signature
- * algorithms sent to the client in a cerificate request for TLS 1.2.
- * On a client this represents the signature algortithms we are
- * willing to use for client authentication. */
- uint8_t *client_sigalgs;
- /* Size of above array */
- size_t client_sigalgslen;
- /* Signature algorithms shared by client and server: cached
- * because these are used most often. */
- TLS_SIGALGS *shared_sigalgs;
- size_t shared_sigalgslen;
-
- /* 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;
-
- /* Optional X509_STORE for chain building or certificate validation
- * If NULL the parent SSL_CTX store is used instead. */
- X509_STORE *chain_store;
- X509_STORE *verify_store;
- } CERT;
-
- typedef struct sess_cert_st {
- /* cert_chain is the certificate chain sent by the peer. NOTE: for a client,
- * this does includes the server's leaf certificate, but, for a server, this
- * does NOT include the client's leaf. */
- STACK_OF(X509) *cert_chain;
-
- /* peer_cert, on a client, is the leaf certificate of the peer. */
- X509 *peer_cert;
-
- DH *peer_dh_tmp;
- EC_KEY *peer_ecdh_tmp;
- } SESS_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 *s);
- void (*ssl_free)(SSL *s);
- int (*ssl_accept)(SSL *s);
- int (*ssl_connect)(SSL *s);
- long (*ssl_get_message)(SSL *s, 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 *s, uint8_t *buf, int len, int peek);
- void (*ssl_read_close_notify)(SSL *s);
- int (*ssl_write_app_data)(SSL *s, const void *buf_, int len);
- int (*ssl_dispatch_alert)(SSL *s);
- long (*ssl_ctrl)(SSL *s, int cmd, long larg, void *parg);
- long (*ssl_ctx_ctrl)(SSL_CTX *ctx, int cmd, long larg, void *parg);
- /* 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 *s, int type, unsigned long len);
- /* Write out handshake message */
- int (*do_write)(SSL *s);
- };
-
- /* 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 {
- int (*prf)(SSL *, uint8_t *, size_t, const uint8_t *, size_t, const char *,
- size_t, const uint8_t *, size_t, const uint8_t *, size_t);
- int (*setup_key_block)(SSL *);
- int (*generate_master_secret)(SSL *, uint8_t *, const uint8_t *, size_t);
- int (*change_cipher_state)(SSL *, int);
- int (*final_finish_mac)(SSL *, const char *, int, uint8_t *);
- int (*cert_verify_mac)(SSL *, int, uint8_t *);
- const char *client_finished_label;
- int client_finished_label_len;
- const char *server_finished_label;
- int server_finished_label_len;
- int (*alert_value)(int);
- int (*export_keying_material)(SSL *, uint8_t *, size_t, const char *, size_t,
- const uint8_t *, size_t, int use_context);
- /* Various flags indicating protocol version requirements */
- unsigned int enc_flags;
- };
-
- #define SSL_HM_HEADER_LENGTH(s) s->method->hhlen
- #define ssl_handshake_start(s) \
- (((uint8_t *)s->init_buf->data) + s->method->hhlen)
- #define ssl_set_handshake_header(s, htype, len) \
- s->method->set_handshake_header(s, htype, len)
- #define ssl_do_write(s) s->method->do_write(s)
-
- /* Values for enc_flags */
-
- /* Uses explicit IV for CBC mode */
- #define SSL_ENC_FLAG_EXPLICIT_IV 0x1
- /* Uses signature algorithms extension */
- #define SSL_ENC_FLAG_SIGALGS 0x2
- /* Uses SHA256 default PRF */
- #define SSL_ENC_FLAG_SHA256_PRF 0x4
- /* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2:
- * may apply to others in future. */
- #define SSL_ENC_FLAG_TLS1_2_CIPHERS 0x8
-
- /* 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 */
- 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;
-
- unsigned int change_cipher_spec_ok;
- } DTLS1_STATE;
-
- extern const SSL3_ENC_METHOD TLSv1_enc_data;
- extern const SSL3_ENC_METHOD TLSv1_1_enc_data;
- extern const SSL3_ENC_METHOD TLSv1_2_enc_data;
- extern const SSL3_ENC_METHOD SSLv3_enc_data;
- extern const SRTP_PROTECTION_PROFILE kSRTPProfiles[];
-
- void ssl_clear_cipher_ctx(SSL *s);
- int ssl_clear_bad_session(SSL *s);
- CERT *ssl_cert_new(void);
- CERT *ssl_cert_dup(CERT *cert);
- void ssl_cert_clear_certs(CERT *c);
- void ssl_cert_free(CERT *c);
- SESS_CERT *ssl_sess_cert_new(void);
- SESS_CERT *ssl_sess_cert_dup(const SESS_CERT *sess_cert);
- void ssl_sess_cert_free(SESS_CERT *sess_cert);
- int ssl_get_new_session(SSL *s, int session);
-
- 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 *s, const CBS *cbs);
- int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, uint8_t *p);
- struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_dup(
- struct ssl_cipher_preference_list_st *cipher_list);
- void ssl_cipher_preference_list_free(
- struct ssl_cipher_preference_list_st *cipher_list);
- struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_from_ciphers(
- STACK_OF(SSL_CIPHER) *ciphers);
- struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *s);
-
- 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 *s, STACK_OF(X509) *sk);
- int ssl_add_cert_chain(SSL *s, unsigned long *l);
- int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref);
- void ssl_update_cache(SSL *s, 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 |s|. 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 *s, uint32_t *out_mask_k,
- uint32_t *out_mask_a);
-
- STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s);
- 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 *s);
- int ssl3_send_new_session_ticket(SSL *s);
- int ssl3_send_cert_status(SSL *s);
- int ssl3_get_finished(SSL *s, int state_a, int state_b);
- int ssl3_send_change_cipher_spec(SSL *s, int state_a, int state_b);
- int ssl3_prf(SSL *s, 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);
- void ssl3_cleanup_key_block(SSL *s);
- int ssl3_do_write(SSL *s, int type);
- int ssl3_send_alert(SSL *s, int level, int desc);
- int ssl3_get_req_cert_type(SSL *s, uint8_t *p);
- long ssl3_get_message(SSL *s, 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 *s);
-
- /* 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 *s, uint8_t *out, size_t *out_len,
- const EVP_MD **out_md, int pkey_type);
-
- int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen);
- int ssl3_supports_cipher(const SSL_CIPHER *cipher);
- int ssl3_dispatch_alert(SSL *s);
- int ssl3_expect_change_cipher_spec(SSL *s);
- int ssl3_read_app_data(SSL *ssl, uint8_t *buf, int len, int peek);
- void ssl3_read_close_notify(SSL *ssl);
- int ssl3_read_bytes(SSL *s, 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 *s, int type, const void *buf, int len);
- int ssl3_final_finish_mac(SSL *s, const char *sender, int slen, uint8_t *p);
- int ssl3_cert_verify_mac(SSL *s, int md_nid, uint8_t *p);
- int ssl3_output_cert_chain(SSL *s);
- const SSL_CIPHER *ssl3_choose_cipher(
- SSL *ssl, STACK_OF(SSL_CIPHER) *clnt,
- struct ssl_cipher_preference_list_st *srvr);
- int ssl3_setup_read_buffer(SSL *s);
- int ssl3_setup_write_buffer(SSL *s);
- int ssl3_release_read_buffer(SSL *s);
- int ssl3_release_write_buffer(SSL *s);
-
- int ssl3_new(SSL *s);
- void ssl3_free(SSL *s);
- int ssl3_accept(SSL *s);
- int ssl3_connect(SSL *s);
- long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg);
- long ssl3_ctx_ctrl(SSL_CTX *s, int cmd, long larg, void *parg);
-
- /* ssl3_record_sequence_update increments the sequence number in |seq|. It
- * returns one on success and zero on wraparound. */
- int ssl3_record_sequence_update(uint8_t *seq, size_t seq_len);
-
- int ssl3_do_change_cipher_spec(SSL *ssl);
-
- int ssl3_set_handshake_header(SSL *s, int htype, unsigned long len);
- int ssl3_handshake_write(SSL *s);
-
- enum dtls1_use_epoch_t {
- dtls1_use_previous_epoch,
- dtls1_use_current_epoch,
- };
-
- int dtls1_do_write(SSL *s, int type, enum dtls1_use_epoch_t use_epoch);
- int ssl3_read_n(SSL *s, int n, int extend);
- int dtls1_read_app_data(SSL *ssl, uint8_t *buf, int len, int peek);
- void dtls1_read_close_notify(SSL *ssl);
- int dtls1_read_bytes(SSL *s, int type, uint8_t *buf, int len, int peek);
- int ssl3_write_pending(SSL *s, int type, const uint8_t *buf, unsigned int len);
- void dtls1_set_message_header(SSL *s, uint8_t mt, unsigned long len,
- unsigned short seq_num, unsigned long frag_off,
- unsigned long frag_len);
-
- int dtls1_write_app_data(SSL *s, const void *buf, int len);
- int dtls1_write_bytes(SSL *s, int type, const void *buf, int len,
- enum dtls1_use_epoch_t use_epoch);
-
- int dtls1_send_change_cipher_spec(SSL *s, int a, int b);
- int dtls1_send_finished(SSL *s, int a, int b, const char *sender, int slen);
- int dtls1_read_failed(SSL *s, int code);
- int dtls1_buffer_message(SSL *s, int ccs);
- int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
- int dtls1_retransmit_buffered_messages(SSL *s);
- void dtls1_clear_record_buffer(SSL *s);
- void dtls1_get_message_header(uint8_t *data, struct hm_header_st *msg_hdr);
- void dtls1_reset_seq_numbers(SSL *s, int rw);
- int dtls1_check_timeout_num(SSL *s);
- int dtls1_set_handshake_header(SSL *s, int type, unsigned long len);
- int dtls1_handshake_write(SSL *s);
-
- int dtls1_supports_cipher(const SSL_CIPHER *cipher);
- void dtls1_start_timer(SSL *s);
- void dtls1_stop_timer(SSL *s);
- int dtls1_is_timer_expired(SSL *s);
- void dtls1_double_timeout(SSL *s);
- unsigned int dtls1_min_mtu(void);
- void dtls1_hm_fragment_free(hm_fragment *frag);
-
- /* some client-only functions */
- int ssl3_send_client_hello(SSL *s);
- int ssl3_get_server_hello(SSL *s);
- int ssl3_get_certificate_request(SSL *s);
- int ssl3_get_new_session_ticket(SSL *s);
- int ssl3_get_cert_status(SSL *s);
- int ssl3_get_server_done(SSL *s);
- int ssl3_send_cert_verify(SSL *s);
- int ssl3_send_client_certificate(SSL *s);
- int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
- int ssl3_send_client_key_exchange(SSL *s);
- int ssl3_get_server_key_exchange(SSL *s);
- int ssl3_get_server_certificate(SSL *s);
- int ssl3_send_next_proto(SSL *s);
- int ssl3_send_channel_id(SSL *s);
-
- int dtls1_client_hello(SSL *s);
-
- /* some server-only functions */
- int ssl3_get_initial_bytes(SSL *s);
- int ssl3_get_v2_client_hello(SSL *s);
- int ssl3_get_client_hello(SSL *s);
- int ssl3_send_server_hello(SSL *s);
- int ssl3_send_server_key_exchange(SSL *s);
- int ssl3_send_certificate_request(SSL *s);
- int ssl3_send_server_done(SSL *s);
- int ssl3_get_client_certificate(SSL *s);
- int ssl3_get_client_key_exchange(SSL *s);
- int ssl3_get_cert_verify(SSL *s);
- int ssl3_get_next_proto(SSL *s);
- int ssl3_get_channel_id(SSL *s);
-
- int dtls1_new(SSL *s);
- int dtls1_accept(SSL *s);
- int dtls1_connect(SSL *s);
- void dtls1_free(SSL *s);
-
- long dtls1_get_message(SSL *s, int st1, int stn, int mt, long max,
- enum ssl_hash_message_t hash_message, int *ok);
- int dtls1_get_record(SSL *s);
- int dtls1_dispatch_alert(SSL *s);
-
- int ssl_init_wbio_buffer(SSL *s, int push);
- void ssl_free_wbio_buffer(SSL *s);
-
- /* tls1_prf computes the TLS PRF function for |s| as described in RFC 5246,
- * section 5 and RFC 2246 section 5. 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 tls1_prf(SSL *s, 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 tls1_change_cipher_state(SSL *s, int which);
- int tls1_setup_key_block(SSL *s);
- int tls1_handshake_digest(SSL *s, uint8_t *out, size_t out_len);
- int tls1_final_finish_mac(SSL *s, const char *str, int slen, uint8_t *p);
- int tls1_cert_verify_mac(SSL *s, int md_nid, uint8_t *p);
- int tls1_generate_master_secret(SSL *s, uint8_t *out, const uint8_t *premaster,
- size_t premaster_len);
- int tls1_export_keying_material(SSL *s, 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);
- int tls1_alert_code(int code);
- int ssl3_alert_code(int code);
-
- char ssl_early_callback_init(struct ssl_early_callback_ctx *ctx);
- int tls1_ec_curve_id2nid(uint16_t curve_id);
- int tls1_ec_nid2curve_id(uint16_t *out_curve_id, int nid);
-
- /* tls1_check_curve parses ECParameters out of |cbs|, modifying it. It
- * checks the curve is one of our preferences and writes the
- * NamedCurve value to |*out_curve_id|. It returns one on success and
- * zero on error. */
- int tls1_check_curve(SSL *s, CBS *cbs, uint16_t *out_curve_id);
-
- /* tls1_get_shared_curve returns the NID of the first preferred shared curve
- * between client and server preferences. If none can be found, it returns
- * NID_undef. */
- int tls1_get_shared_curve(SSL *s);
-
- /* 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 *s, X509 *x);
-
- /* tls1_check_ec_tmp_key returns one if the EC temporary key is compatible with
- * client extensions and zero otherwise. */
- int tls1_check_ec_tmp_key(SSL *s);
-
- int tls1_shared_list(SSL *s, const uint8_t *l1, size_t l1len, const uint8_t *l2,
- size_t l2len, int nmatch);
- uint8_t *ssl_add_clienthello_tlsext(SSL *s, uint8_t *const buf,
- uint8_t *const limit, size_t header_len);
- uint8_t *ssl_add_serverhello_tlsext(SSL *s, uint8_t *const buf,
- uint8_t *const limit);
- int ssl_parse_clienthello_tlsext(SSL *s, CBS *cbs);
- int ssl_parse_serverhello_tlsext(SSL *s, CBS *cbs);
-
- #define tlsext_tick_md EVP_sha256
-
- /* tls_process_ticket processes the session ticket extension. On success, it
- * sets |*out_session| to the decrypted session or NULL if the ticket was
- * rejected. It sets |*out_send_ticket| to whether a new ticket should be sent
- * at the end of the handshake. It returns one on success and zero on fatal
- * error. */
- int tls_process_ticket(SSL *ssl, SSL_SESSION **out_session,
- int *out_send_ticket, const uint8_t *ticket,
- size_t ticket_len, const uint8_t *session_id,
- size_t session_id_len);
-
- /* tls12_get_sigandhash assembles the SignatureAndHashAlgorithm corresponding to
- * |ssl|'s private key and |md|. The two-byte value is written to |p|. It
- * returns one on success and zero on failure. */
- int tls12_get_sigandhash(SSL *ssl, uint8_t *p, 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 *s);
-
- int tls1_set_sigalgs_list(CERT *c, const char *str, int client);
- int tls1_set_sigalgs(CERT *c, const int *salg, size_t salglen, int client);
-
- /* ssl_ctx_log_rsa_client_key_exchange logs |premaster| to |ctx|, if logging is
- * enabled. It returns one on success and zero on failure. The entry is
- * identified by the first 8 bytes of |encrypted_premaster|. */
- int ssl_ctx_log_rsa_client_key_exchange(SSL_CTX *ctx,
- const uint8_t *encrypted_premaster,
- size_t encrypted_premaster_len,
- const uint8_t *premaster,
- size_t premaster_len);
-
- /* ssl_ctx_log_master_secret logs |master| to |ctx|, if logging is enabled. It
- * returns one on success and zero on failure. The entry is identified by
- * |client_random|. */
- int ssl_ctx_log_master_secret(SSL_CTX *ctx, 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 |s| is allowed to False Start and zero
- * otherwise. */
- int ssl3_can_false_start(const SSL *s);
-
- /* 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 |s| as a server, or zero if all versions are disabled. */
- uint16_t ssl3_get_max_server_version(const SSL *s);
-
- /* ssl3_get_mutual_version selects the protocol version on |s| for a client
- * which advertises |client_version|. If no suitable version exists, it returns
- * zero. */
- uint16_t ssl3_get_mutual_version(SSL *s, 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 *s);
-
- /* ssl3_is_version_enabled returns one if |version| is an enabled protocol
- * version for |s| and zero otherwise. */
- int ssl3_is_version_enabled(SSL *s, 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(SSL *s, uint16_t wire_version);
-
- uint32_t ssl_get_algorithm_prf(SSL *s);
- int tls1_process_sigalgs(SSL *s, 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 *s, const uint8_t **psigs);
- int tls12_check_peer_sigalg(const EVP_MD **out_md, int *out_alert, SSL *s,
- CBS *cbs, EVP_PKEY *pkey);
- void ssl_set_client_disabled(SSL *s);
-
- #endif /* OPENSSL_HEADER_SSL_INTERNAL_H */
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