/* 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;
}