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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 <openssl/ssl.h>
#include <assert.h>
#include <string.h>
#include <openssl/buf.h>
#include <openssl/dh.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#include <openssl/mem.h>
#include <openssl/nid.h>
#include "internal.h"
int ssl3_supports_cipher(const SSL_CIPHER *cipher) {
return 1;
}
int ssl3_set_handshake_header(SSL *ssl, int htype, unsigned long len) {
uint8_t *p = (uint8_t *)ssl->init_buf->data;
*(p++) = htype;
l2n3(len, p);
ssl->init_num = (int)len + SSL3_HM_HEADER_LENGTH;
ssl->init_off = 0;
/* Add the message to the handshake hash. */
return ssl3_update_handshake_hash(ssl, (uint8_t *)ssl->init_buf->data,
ssl->init_num);
}
int ssl3_handshake_write(SSL *ssl) {
return ssl3_do_write(ssl, SSL3_RT_HANDSHAKE);
}
int ssl3_new(SSL *ssl) {
SSL3_STATE *s3;
s3 = OPENSSL_malloc(sizeof *s3);
if (s3 == NULL) {
goto err;
}
memset(s3, 0, sizeof *s3);
EVP_MD_CTX_init(&s3->handshake_hash);
EVP_MD_CTX_init(&s3->handshake_md5);
ssl->s3 = s3;
/* Set the version to the highest supported version.
*
* TODO(davidben): Move this field into |s3|, have it store the normalized
* protocol version, and implement this pre-negotiation quirk in |SSL_version|
* at the API boundary rather than in internal state. */
ssl->version = TLS1_2_VERSION;
return 1;
err:
return 0;
}
void ssl3_free(SSL *ssl) {
if (ssl == NULL || ssl->s3 == NULL) {
return;
}
ssl3_cleanup_key_block(ssl);
ssl_read_buffer_clear(ssl);
ssl_write_buffer_clear(ssl);
SSL_ECDH_CTX_cleanup(&ssl->s3->tmp.ecdh_ctx);
OPENSSL_free(ssl->s3->tmp.peer_key);
sk_X509_NAME_pop_free(ssl->s3->tmp.ca_names, X509_NAME_free);
OPENSSL_free(ssl->s3->tmp.certificate_types);
OPENSSL_free(ssl->s3->tmp.peer_ellipticcurvelist);
OPENSSL_free(ssl->s3->tmp.peer_psk_identity_hint);
ssl3_free_handshake_buffer(ssl);
ssl3_free_handshake_hash(ssl);
OPENSSL_free(ssl->s3->next_proto_negotiated);
OPENSSL_free(ssl->s3->alpn_selected);
SSL_AEAD_CTX_free(ssl->s3->aead_read_ctx);
SSL_AEAD_CTX_free(ssl->s3->aead_write_ctx);
OPENSSL_cleanse(ssl->s3, sizeof *ssl->s3);
OPENSSL_free(ssl->s3);
ssl->s3 = NULL;
}
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_tmp_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, 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, 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, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
return SSL_CTX_set1_curves(ctx, &nid, 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, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
return SSL_set1_curves(ssl, &nid, 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;
}
static int is_p256_key(EVP_PKEY *private_key) {
const EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(private_key);
return ec_key != NULL &&
EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key)) ==
NID_X9_62_prime256v1;
}
int SSL_CTX_set1_tls_channel_id(SSL_CTX *ctx, EVP_PKEY *private_key) {
if (!is_p256_key(private_key)) {
OPENSSL_PUT_ERROR(SSL, 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);
ctx->tlsext_channel_id_enabled = 1;
return 1;
}
int SSL_set1_tls_channel_id(SSL *ssl, EVP_PKEY *private_key) {
if (!is_p256_key(private_key)) {
OPENSSL_PUT_ERROR(SSL, 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);
ssl->tlsext_channel_id_enabled = 1;
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;
}
size_t len = strlen(name);
if (len == 0 || len > TLSEXT_MAXLEN_host_name) {
OPENSSL_PUT_ERROR(SSL, SSL_R_SSL3_EXT_INVALID_SERVERNAME);
return 0;
}
ssl->tlsext_hostname = BUF_strdup(name);
if (ssl->tlsext_hostname == NULL) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
return 0;
}
return 1;
}
size_t SSL_get0_certificate_types(SSL *ssl, const uint8_t **out_types) {
if (ssl->server || !ssl->s3->tmp.cert_req) {
*out_types = NULL;
return 0;
}
*out_types = ssl->s3->tmp.certificate_types;
return ssl->s3->tmp.num_certificate_types;
}
int SSL_CTX_set1_curves(SSL_CTX *ctx, const int *curves, size_t curves_len) {
return tls1_set_curves(&ctx->tlsext_ellipticcurvelist,
&ctx->tlsext_ellipticcurvelist_length, curves,
curves_len);
}
int SSL_set1_curves(SSL *ssl, const int *curves, size_t curves_len) {
return tls1_set_curves(&ssl->tlsext_ellipticcurvelist,
&ssl->tlsext_ellipticcurvelist_length, curves,
curves_len);
}
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_get_tlsext_ticket_keys(SSL_CTX *ctx, void *out, size_t len) {
if (out == NULL) {
return 48;
}
if (len != 48) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_TICKET_KEYS_LENGTH);
return 0;
}
uint8_t *out_bytes = out;
memcpy(out_bytes, ctx->tlsext_tick_key_name, 16);
memcpy(out_bytes + 16, ctx->tlsext_tick_hmac_key, 16);
memcpy(out_bytes + 32, ctx->tlsext_tick_aes_key, 16);
return 1;
}
int SSL_CTX_set_tlsext_ticket_keys(SSL_CTX *ctx, const void *in, size_t len) {
if (in == NULL) {
return 48;
}
if (len != 48) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_TICKET_KEYS_LENGTH);
return 0;
}
const uint8_t *in_bytes = in;
memcpy(ctx->tlsext_tick_key_name, in_bytes, 16);
memcpy(ctx->tlsext_tick_hmac_key, in_bytes + 16, 16);
memcpy(ctx->tlsext_tick_aes_key, in_bytes + 32, 16);
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 *ssl) {
if (ssl->cipher_list != NULL) {
return ssl->cipher_list;
}
if (ssl->version >= TLS1_1_VERSION && ssl->ctx->cipher_list_tls11 != NULL) {
return ssl->ctx->cipher_list_tls11;
}
if (ssl->version >= TLS1_VERSION && ssl->ctx->cipher_list_tls10 != NULL) {
return ssl->ctx->cipher_list_tls10;
}
if (ssl->ctx->cipher_list != NULL) {
return ssl->ctx->cipher_list;
}
return NULL;
}
const SSL_CIPHER *ssl3_choose_cipher(
SSL *ssl, 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 (ssl->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(ssl, &mask_k, &mask_a);
for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
c = sk_SSL_CIPHER_value(prio, i);
ok = 1;
/* Check the TLS version. */
if (SSL_CIPHER_get_min_version(c) > ssl3_protocol_version(ssl)) {
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 *ssl, uint8_t *p) {
int ret = 0;
const uint8_t *sig;
size_t i, siglen;
int have_rsa_sign = 0;
int have_ecdsa_sign = 0;
/* get configured sigalgs */
siglen = tls12_get_psigalgs(ssl, &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 (ssl->version >= TLS1_VERSION && have_ecdsa_sign) {
p[ret++] = TLS_CT_ECDSA_SIGN;
}
return ret;
}
/* If we are using default SHA1+MD5 algorithms switch to new SHA256 PRF and
* handshake macs if required. */
uint32_t ssl_get_algorithm_prf(const SSL *ssl) {
uint32_t algorithm_prf = ssl->s3->tmp.new_cipher->algorithm_prf;
if (algorithm_prf == SSL_HANDSHAKE_MAC_DEFAULT &&
ssl3_protocol_version(ssl) >= TLS1_2_VERSION) {
return SSL_HANDSHAKE_MAC_SHA256;
}
return algorithm_prf;
}