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a1c90a5ce1
boringssl/ssl/s3_lib.c
David Benjamin a1c90a5ce1 Further tidy up cipher logic. 
With SSL2 gone, there's no need for this split between the abstract
cipher framework and ciphers. Put the cipher suite table in ssl_cipher.c
and move other SSL_CIPHER logic there. With that gone, prune the
cipher-related hooks in SSL_PROTOCOL_METHOD.

BUG=468889

Change-Id: I48579de8bc4c0ea52781ba1b7b57bc5b4919d21c
Reviewed-on: https://boringssl-review.googlesource.com/4961
Reviewed-by: Adam Langley <agl@google.com>
2015-06-01 22:48:30 +00:00

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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
*
* Portions of the attached software ("Contribution") are developed by
* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
*
* The Contribution is licensed pursuant to the OpenSSL open source
* license provided above.
*
* ECC cipher suite support in OpenSSL originally written by
* Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
*
*/
/* ====================================================================
* 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. */
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <openssl/buf.h>
#include <openssl/dh.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#include <openssl/mem.h>
#include <openssl/obj.h>
#include "internal.h"
const SSL3_ENC_METHOD SSLv3_enc_data = {
ssl3_prf,
tls1_setup_key_block,
tls1_generate_master_secret,
tls1_change_cipher_state,
ssl3_final_finish_mac,
ssl3_cert_verify_mac,
SSL3_MD_CLIENT_FINISHED_CONST, 4,
SSL3_MD_SERVER_FINISHED_CONST, 4,
ssl3_alert_code,
tls1_export_keying_material,
0,
};
int ssl3_supports_cipher(const SSL_CIPHER *cipher) {
return 1;
}
int ssl3_set_handshake_header(SSL *s, int htype, unsigned long len) {
uint8_t *p = (uint8_t *)s->init_buf->data;
*(p++) = htype;
l2n3(len, p);
s->init_num = (int)len + SSL3_HM_HEADER_LENGTH;
s->init_off = 0;
/* Add the message to the handshake hash. */
return ssl3_finish_mac(s, (uint8_t *)s->init_buf->data, s->init_num);
}
int ssl3_handshake_write(SSL *s) { return ssl3_do_write(s, SSL3_RT_HANDSHAKE); }
int ssl3_new(SSL *s) {
SSL3_STATE *s3;
s3 = OPENSSL_malloc(sizeof *s3);
if (s3 == NULL) {
goto err;
}
memset(s3, 0, sizeof *s3);
memset(s3->rrec.seq_num, 0, sizeof(s3->rrec.seq_num));
s->s3 = s3;
/* Set the version to the highest supported version for TLS. This controls the
* initial state of |s->enc_method| and what the API reports as the version
* prior to negotiation.
*
* TODO(davidben): This is fragile and confusing. */
s->version = TLS1_2_VERSION;
return 1;
err:
return 0;
}
void ssl3_free(SSL *s) {
if (s == NULL || s->s3 == NULL) {
return;
}
BUF_MEM_free(s->s3->sniff_buffer);
ssl3_cleanup_key_block(s);
ssl3_release_read_buffer(s);
ssl3_release_write_buffer(s);
DH_free(s->s3->tmp.dh);
EC_KEY_free(s->s3->tmp.ecdh);
sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
OPENSSL_free(s->s3->tmp.certificate_types);
OPENSSL_free(s->s3->tmp.peer_ecpointformatlist);
OPENSSL_free(s->s3->tmp.peer_ellipticcurvelist);
OPENSSL_free(s->s3->tmp.peer_psk_identity_hint);
BIO_free(s->s3->handshake_buffer);
ssl3_free_digest_list(s);
OPENSSL_free(s->s3->alpn_selected);
OPENSSL_cleanse(s->s3, sizeof *s->s3);
OPENSSL_free(s->s3);
s->s3 = NULL;
}
static int ssl3_set_req_cert_type(CERT *c, const uint8_t *p, size_t len);
int SSL_session_reused(const SSL *ssl) {
return ssl->hit;
}
int SSL_total_renegotiations(const SSL *ssl) {
return ssl->s3->total_renegotiations;
}
int SSL_num_renegotiations(const SSL *ssl) {
return SSL_total_renegotiations(ssl);
}
int SSL_CTX_need_tmp_RSA(const SSL_CTX *ctx) {
return 0;
}
int SSL_need_rsa(const SSL *ssl) {
return 0;
}
int SSL_CTX_set_tmp_rsa(SSL_CTX *ctx, const RSA *rsa) {
return 1;
}
int SSL_set_tmp_rsa(SSL *ssl, const RSA *rsa) {
return 1;
}
int SSL_CTX_set_tmp_dh(SSL_CTX *ctx, const DH *dh) {
DH_free(ctx->cert->dh_tmp);
ctx->cert->dh_tmp = DHparams_dup(dh);
if (ctx->cert->dh_tmp == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_tmp_dh, ERR_R_DH_LIB);
return 0;
}
return 1;
}
int SSL_set_tmp_dh(SSL *ssl, const DH *dh) {
DH_free(ssl->cert->dh_tmp);
ssl->cert->dh_tmp = DHparams_dup(dh);
if (ssl->cert->dh_tmp == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_set_tmp_dh, ERR_R_DH_LIB);
return 0;
}
return 1;
}
int SSL_CTX_set_tmp_ecdh(SSL_CTX *ctx, const EC_KEY *ec_key) {
if (ec_key == NULL || EC_KEY_get0_group(ec_key) == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_tmp_ecdh, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
ctx->cert->ecdh_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
return 1;
}
int SSL_set_tmp_ecdh(SSL *ssl, const EC_KEY *ec_key) {
if (ec_key == NULL || EC_KEY_get0_group(ec_key) == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_set_tmp_ecdh, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
ssl->cert->ecdh_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
return 1;
}
int SSL_CTX_enable_tls_channel_id(SSL_CTX *ctx) {
ctx->tlsext_channel_id_enabled = 1;
return 1;
}
int SSL_enable_tls_channel_id(SSL *ssl) {
ssl->tlsext_channel_id_enabled = 1;
return 1;
}
int SSL_CTX_set1_tls_channel_id(SSL_CTX *ctx, EVP_PKEY *private_key) {
ctx->tlsext_channel_id_enabled = 1;
if (EVP_PKEY_id(private_key) != EVP_PKEY_EC ||
EVP_PKEY_bits(private_key) != 256) {
OPENSSL_PUT_ERROR(SSL, SSL_CTX_set1_tls_channel_id,
SSL_R_CHANNEL_ID_NOT_P256);
return 0;
}
EVP_PKEY_free(ctx->tlsext_channel_id_private);
ctx->tlsext_channel_id_private = EVP_PKEY_up_ref(private_key);
return 1;
}
int SSL_set1_tls_channel_id(SSL *ssl, EVP_PKEY *private_key) {
ssl->tlsext_channel_id_enabled = 1;
if (EVP_PKEY_id(private_key) != EVP_PKEY_EC ||
EVP_PKEY_bits(private_key) != 256) {
OPENSSL_PUT_ERROR(SSL, SSL_set1_tls_channel_id, SSL_R_CHANNEL_ID_NOT_P256);
return 0;
}
EVP_PKEY_free(ssl->tlsext_channel_id_private);
ssl->tlsext_channel_id_private = EVP_PKEY_up_ref(private_key);
return 1;
}
size_t SSL_get_tls_channel_id(SSL *ssl, uint8_t *out, size_t max_out) {
if (!ssl->s3->tlsext_channel_id_valid) {
return 0;
}
memcpy(out, ssl->s3->tlsext_channel_id, (max_out < 64) ? max_out : 64);
return 64;
}
int SSL_set_tlsext_host_name(SSL *ssl, const char *name) {
OPENSSL_free(ssl->tlsext_hostname);
ssl->tlsext_hostname = NULL;
if (name == NULL) {
return 1;
}
if (strlen(name) > TLSEXT_MAXLEN_host_name) {
OPENSSL_PUT_ERROR(SSL, SSL_set_tlsext_host_name,
SSL_R_SSL3_EXT_INVALID_SERVERNAME);
return 0;
}
ssl->tlsext_hostname = BUF_strdup(name);
if (ssl->tlsext_hostname == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_set_tlsext_host_name, ERR_R_MALLOC_FAILURE);
return 0;
}
return 1;
}
long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg) {
int ret = 0;
switch (cmd) {
case SSL_CTRL_CHAIN:
if (larg) {
return ssl_cert_set1_chain(s->cert, (STACK_OF(X509) *)parg);
} else {
return ssl_cert_set0_chain(s->cert, (STACK_OF(X509) *)parg);
}
case SSL_CTRL_CHAIN_CERT:
if (larg) {
return ssl_cert_add1_chain_cert(s->cert, (X509 *)parg);
} else {
return ssl_cert_add0_chain_cert(s->cert, (X509 *)parg);
}
case SSL_CTRL_GET_CHAIN_CERTS:
*(STACK_OF(X509) **)parg = s->cert->key->chain;
ret = 1;
break;
case SSL_CTRL_SELECT_CURRENT_CERT:
return ssl_cert_select_current(s->cert, (X509 *)parg);
case SSL_CTRL_GET_CURVES: {
const uint16_t *clist = s->s3->tmp.peer_ellipticcurvelist;
size_t clistlen = s->s3->tmp.peer_ellipticcurvelist_length;
if (parg) {
size_t i;
int *cptr = parg;
int nid;
for (i = 0; i < clistlen; i++) {
nid = tls1_ec_curve_id2nid(clist[i]);
if (nid != NID_undef) {
cptr[i] = nid;
} else {
cptr[i] = TLSEXT_nid_unknown | clist[i];
}
}
}
return (int)clistlen;
}
case SSL_CTRL_SET_CURVES:
return tls1_set_curves(&s->tlsext_ellipticcurvelist,
&s->tlsext_ellipticcurvelist_length, parg, larg);
case SSL_CTRL_SET_SIGALGS:
return tls1_set_sigalgs(s->cert, parg, larg, 0);
case SSL_CTRL_SET_CLIENT_SIGALGS:
return tls1_set_sigalgs(s->cert, parg, larg, 1);
case SSL_CTRL_GET_CLIENT_CERT_TYPES: {
const uint8_t **pctype = parg;
if (s->server || !s->s3->tmp.cert_req) {
return 0;
}
if (pctype) {
*pctype = s->s3->tmp.certificate_types;
}
return (int)s->s3->tmp.num_certificate_types;
}
case SSL_CTRL_SET_CLIENT_CERT_TYPES:
if (!s->server) {
return 0;
}
return ssl3_set_req_cert_type(s->cert, parg, larg);
case SSL_CTRL_BUILD_CERT_CHAIN:
return ssl_build_cert_chain(s->cert, s->ctx->cert_store, larg);
case SSL_CTRL_SET_VERIFY_CERT_STORE:
return ssl_cert_set_cert_store(s->cert, parg, 0, larg);
case SSL_CTRL_SET_CHAIN_CERT_STORE:
return ssl_cert_set_cert_store(s->cert, parg, 1, larg);
case SSL_CTRL_GET_SERVER_TMP_KEY:
if (s->server || !s->session || !s->session->sess_cert) {
return 0;
} else {
SESS_CERT *sc;
EVP_PKEY *ptmp;
int rv = 0;
sc = s->session->sess_cert;
if (!sc->peer_dh_tmp && !sc->peer_ecdh_tmp) {
return 0;
}
ptmp = EVP_PKEY_new();
if (!ptmp) {
return 0;
}
if (sc->peer_dh_tmp) {
rv = EVP_PKEY_set1_DH(ptmp, sc->peer_dh_tmp);
} else if (sc->peer_ecdh_tmp) {
rv = EVP_PKEY_set1_EC_KEY(ptmp, sc->peer_ecdh_tmp);
}
if (rv) {
*(EVP_PKEY **)parg = ptmp;
return 1;
}
EVP_PKEY_free(ptmp);
return 0;
}
case SSL_CTRL_GET_EC_POINT_FORMATS: {
const uint8_t **pformat = parg;
if (!s->s3->tmp.peer_ecpointformatlist) {
return 0;
}
*pformat = s->s3->tmp.peer_ecpointformatlist;
return (int)s->s3->tmp.peer_ecpointformatlist_length;
}
default:
break;
}
return ret;
}
long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) {
switch (cmd) {
case SSL_CTRL_SET_TLSEXT_TICKET_KEYS:
case SSL_CTRL_GET_TLSEXT_TICKET_KEYS: {
uint8_t *keys = parg;
if (!keys) {
return 48;
}
if (larg != 48) {
OPENSSL_PUT_ERROR(SSL, ssl3_ctx_ctrl, SSL_R_INVALID_TICKET_KEYS_LENGTH);
return 0;
}
if (cmd == SSL_CTRL_SET_TLSEXT_TICKET_KEYS) {
memcpy(ctx->tlsext_tick_key_name, keys, 16);
memcpy(ctx->tlsext_tick_hmac_key, keys + 16, 16);
memcpy(ctx->tlsext_tick_aes_key, keys + 32, 16);
} else {
memcpy(keys, ctx->tlsext_tick_key_name, 16);
memcpy(keys + 16, ctx->tlsext_tick_hmac_key, 16);
memcpy(keys + 32, ctx->tlsext_tick_aes_key, 16);
}
return 1;
}
case SSL_CTRL_SET_CURVES:
return tls1_set_curves(&ctx->tlsext_ellipticcurvelist,
&ctx->tlsext_ellipticcurvelist_length, parg, larg);
case SSL_CTRL_SET_SIGALGS:
return tls1_set_sigalgs(ctx->cert, parg, larg, 0);
case SSL_CTRL_SET_CLIENT_SIGALGS:
return tls1_set_sigalgs(ctx->cert, parg, larg, 1);
case SSL_CTRL_SET_CLIENT_CERT_TYPES:
return ssl3_set_req_cert_type(ctx->cert, parg, larg);
case SSL_CTRL_BUILD_CERT_CHAIN:
return ssl_build_cert_chain(ctx->cert, ctx->cert_store, larg);
case SSL_CTRL_SET_VERIFY_CERT_STORE:
return ssl_cert_set_cert_store(ctx->cert, parg, 0, larg);
case SSL_CTRL_SET_CHAIN_CERT_STORE:
return ssl_cert_set_cert_store(ctx->cert, parg, 1, larg);
case SSL_CTRL_EXTRA_CHAIN_CERT:
if (ctx->extra_certs == NULL) {
ctx->extra_certs = sk_X509_new_null();
if (ctx->extra_certs == NULL) {
return 0;
}
}
sk_X509_push(ctx->extra_certs, (X509 *)parg);
break;
case SSL_CTRL_GET_EXTRA_CHAIN_CERTS:
if (ctx->extra_certs == NULL && larg == 0) {
*(STACK_OF(X509) **)parg = ctx->cert->key->chain;
} else {
*(STACK_OF(X509) **)parg = ctx->extra_certs;
}
break;
case SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS:
sk_X509_pop_free(ctx->extra_certs, X509_free);
ctx->extra_certs = NULL;
break;
case SSL_CTRL_CHAIN:
if (larg) {
return ssl_cert_set1_chain(ctx->cert, (STACK_OF(X509) *)parg);
} else {
return ssl_cert_set0_chain(ctx->cert, (STACK_OF(X509) *)parg);
}
case SSL_CTRL_CHAIN_CERT:
if (larg) {
return ssl_cert_add1_chain_cert(ctx->cert, (X509 *)parg);
} else {
return ssl_cert_add0_chain_cert(ctx->cert, (X509 *)parg);
}
case SSL_CTRL_GET_CHAIN_CERTS:
*(STACK_OF(X509) **)parg = ctx->cert->key->chain;
break;
case SSL_CTRL_SELECT_CURRENT_CERT:
return ssl_cert_select_current(ctx->cert, (X509 *)parg);
default:
return 0;
}
return 1;
}
int SSL_CTX_set_tlsext_servername_callback(
SSL_CTX *ctx, int (*callback)(SSL *ssl, int *out_alert, void *arg)) {
ctx->tlsext_servername_callback = callback;
return 1;
}
int SSL_CTX_set_tlsext_servername_arg(SSL_CTX *ctx, void *arg) {
ctx->tlsext_servername_arg = arg;
return 1;
}
int SSL_CTX_set_tlsext_ticket_key_cb(
SSL_CTX *ctx, int (*callback)(SSL *ssl, uint8_t *key_name, uint8_t *iv,
EVP_CIPHER_CTX *ctx, HMAC_CTX *hmac_ctx,
int encrypt)) {
ctx->tlsext_ticket_key_cb = callback;
return 1;
}
struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *s) {
if (s->cipher_list != NULL) {
return s->cipher_list;
}
if (s->version >= TLS1_1_VERSION && s->ctx != NULL &&
s->ctx->cipher_list_tls11 != NULL) {
return s->ctx->cipher_list_tls11;
}
if (s->ctx != NULL && s->ctx->cipher_list != NULL) {
return s->ctx->cipher_list;
}
return NULL;
}
const SSL_CIPHER *ssl3_choose_cipher(
SSL *s, STACK_OF(SSL_CIPHER) *clnt,
struct ssl_cipher_preference_list_st *server_pref) {
const SSL_CIPHER *c, *ret = NULL;
STACK_OF(SSL_CIPHER) *srvr = server_pref->ciphers, *prio, *allow;
size_t i;
int ok;
size_t cipher_index;
uint32_t alg_k, alg_a, mask_k, mask_a;
/* in_group_flags will either be NULL, or will point to an array of bytes
* which indicate equal-preference groups in the |prio| stack. See the
* comment about |in_group_flags| in the |ssl_cipher_preference_list_st|
* struct. */
const uint8_t *in_group_flags;
/* group_min contains the minimal index so far found in a group, or -1 if no
* such value exists yet. */
int group_min = -1;
if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
prio = srvr;
in_group_flags = server_pref->in_group_flags;
allow = clnt;
} else {
prio = clnt;
in_group_flags = NULL;
allow = srvr;
}
ssl_get_compatible_server_ciphers(s, &mask_k, &mask_a);
for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
c = sk_SSL_CIPHER_value(prio, i);
ok = 1;
/* Skip TLS v1.2 only ciphersuites if not supported */
if ((c->algorithm_ssl & SSL_TLSV1_2) && !SSL_USE_TLS1_2_CIPHERS(s)) {
ok = 0;
}
alg_k = c->algorithm_mkey;
alg_a = c->algorithm_auth;
ok = ok && (alg_k & mask_k) && (alg_a & mask_a);
if (ok && sk_SSL_CIPHER_find(allow, &cipher_index, c)) {
if (in_group_flags != NULL && in_group_flags[i] == 1) {
/* This element of |prio| is in a group. Update the minimum index found
* so far and continue looking. */
if (group_min == -1 || (size_t)group_min > cipher_index) {
group_min = cipher_index;
}
} else {
if (group_min != -1 && (size_t)group_min < cipher_index) {
cipher_index = group_min;
}
ret = sk_SSL_CIPHER_value(allow, cipher_index);
break;
}
}
if (in_group_flags != NULL && in_group_flags[i] == 0 && group_min != -1) {
/* We are about to leave a group, but we found a match in it, so that's
* our answer. */
ret = sk_SSL_CIPHER_value(allow, group_min);
break;
}
}
return ret;
}
int ssl3_get_req_cert_type(SSL *s, uint8_t *p) {
int ret = 0;
const uint8_t *sig;
size_t i, siglen;
int have_rsa_sign = 0;
int have_ecdsa_sign = 0;
/* If we have custom certificate types set, use them */
if (s->cert->client_certificate_types) {
memcpy(p, s->cert->client_certificate_types,
s->cert->num_client_certificate_types);
return s->cert->num_client_certificate_types;
}
/* get configured sigalgs */
siglen = tls12_get_psigalgs(s, &sig);
for (i = 0; i < siglen; i += 2, sig += 2) {
switch (sig[1]) {
case TLSEXT_signature_rsa:
have_rsa_sign = 1;
break;
case TLSEXT_signature_ecdsa:
have_ecdsa_sign = 1;
break;
}
}
if (have_rsa_sign) {
p[ret++] = SSL3_CT_RSA_SIGN;
}
/* ECDSA certs can be used with RSA cipher suites as well so we don't need to
* check for SSL_kECDH or SSL_kECDHE. */
if (s->version >= TLS1_VERSION && have_ecdsa_sign) {
p[ret++] = TLS_CT_ECDSA_SIGN;
}
return ret;
}
static int ssl3_set_req_cert_type(CERT *c, const uint8_t *p, size_t len) {
OPENSSL_free(c->client_certificate_types);
c->client_certificate_types = NULL;
c->num_client_certificate_types = 0;
if (!p || !len) {
return 1;
}
if (len > 0xff) {
return 0;
}
c->client_certificate_types = BUF_memdup(p, len);
if (!c->client_certificate_types) {
return 0;
}
c->num_client_certificate_types = len;
return 1;
}
/* If we are using default SHA1+MD5 algorithms switch to new SHA256 PRF and
* handshake macs if required. */
uint32_t ssl_get_algorithm2(SSL *s) {
static const uint32_t kMask = SSL_HANDSHAKE_MAC_DEFAULT;
uint32_t alg2 = s->s3->tmp.new_cipher->algorithm2;
if (s->enc_method->enc_flags & SSL_ENC_FLAG_SHA256_PRF &&
(alg2 & kMask) == kMask) {
return SSL_HANDSHAKE_MAC_SHA256;
}
return alg2;
}
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