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ssl_lib.cc
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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.
* 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. */
#include <openssl/ssl.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/bytestring.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/mem.h>
#include <openssl/rand.h>
#include "internal.h"
#include "../crypto/internal.h"
#if defined(OPENSSL_WINDOWS)
#include <sys/timeb.h>
#else
#include <sys/socket.h>
#include <sys/time.h>
#endif
namespace bssl {
// |SSL_R_UNKNOWN_PROTOCOL| is no longer emitted, but continue to define it
// to avoid downstream churn.
OPENSSL_DECLARE_ERROR_REASON(SSL, UNKNOWN_PROTOCOL)
// The following errors are no longer emitted, but are used in nginx without
// #ifdefs.
OPENSSL_DECLARE_ERROR_REASON(SSL, BLOCK_CIPHER_PAD_IS_WRONG)
OPENSSL_DECLARE_ERROR_REASON(SSL, NO_CIPHERS_SPECIFIED)
// Some error codes are special. Ensure the make_errors.go script never
// regresses this.
static_assert(SSL_R_TLSV1_ALERT_NO_RENEGOTIATION ==
SSL_AD_NO_RENEGOTIATION + SSL_AD_REASON_OFFSET,
"alert reason code mismatch");
// kMaxHandshakeSize is the maximum size, in bytes, of a handshake message.
static const size_t kMaxHandshakeSize = (1u << 24) - 1;
static CRYPTO_EX_DATA_CLASS g_ex_data_class_ssl =
CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA;
static CRYPTO_EX_DATA_CLASS g_ex_data_class_ssl_ctx =
CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA;
bool CBBFinishArray(CBB *cbb, Array<uint8_t> *out) {
uint8_t *ptr;
size_t len;
if (!CBB_finish(cbb, &ptr, &len)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return false;
}
out->Reset(ptr, len);
return true;
}
void ssl_reset_error_state(SSL *ssl) {
// Functions which use |SSL_get_error| must reset I/O and error state on
// entry.
ssl->s3->rwstate = SSL_NOTHING;
ERR_clear_error();
ERR_clear_system_error();
}
void ssl_set_read_error(SSL* ssl) {
ssl->s3->read_shutdown = ssl_shutdown_error;
ssl->s3->read_error.reset(ERR_save_state());
}
static bool check_read_error(const SSL *ssl) {
if (ssl->s3->read_shutdown == ssl_shutdown_error) {
ERR_restore_state(ssl->s3->read_error.get());
return false;
}
return true;
}
int ssl_can_write(const SSL *ssl) {
return !SSL_in_init(ssl) || ssl->s3->hs->can_early_write;
}
int ssl_can_read(const SSL *ssl) {
return !SSL_in_init(ssl) || ssl->s3->hs->can_early_read;
}
ssl_open_record_t ssl_open_handshake(SSL *ssl, size_t *out_consumed,
uint8_t *out_alert, Span<uint8_t> in) {
*out_consumed = 0;
if (!check_read_error(ssl)) {
*out_alert = 0;
return ssl_open_record_error;
}
auto ret = ssl->method->open_handshake(ssl, out_consumed, out_alert, in);
if (ret == ssl_open_record_error) {
ssl_set_read_error(ssl);
}
return ret;
}
ssl_open_record_t ssl_open_change_cipher_spec(SSL *ssl, size_t *out_consumed,
uint8_t *out_alert,
Span<uint8_t> in) {
*out_consumed = 0;
if (!check_read_error(ssl)) {
*out_alert = 0;
return ssl_open_record_error;
}
auto ret =
ssl->method->open_change_cipher_spec(ssl, out_consumed, out_alert, in);
if (ret == ssl_open_record_error) {
ssl_set_read_error(ssl);
}
return ret;
}
ssl_open_record_t ssl_open_app_data(SSL *ssl, Span<uint8_t> *out,
size_t *out_consumed, uint8_t *out_alert,
Span<uint8_t> in) {
*out_consumed = 0;
if (!check_read_error(ssl)) {
*out_alert = 0;
return ssl_open_record_error;
}
auto ret = ssl->method->open_app_data(ssl, out, out_consumed, out_alert, in);
if (ret == ssl_open_record_error) {
ssl_set_read_error(ssl);
}
return ret;
}
void ssl_cipher_preference_list_free(
struct ssl_cipher_preference_list_st *cipher_list) {
if (cipher_list == NULL) {
return;
}
sk_SSL_CIPHER_free(cipher_list->ciphers);
OPENSSL_free(cipher_list->in_group_flags);
OPENSSL_free(cipher_list);
}
void ssl_update_cache(SSL_HANDSHAKE *hs, int mode) {
SSL *const ssl = hs->ssl;
SSL_CTX *ctx = ssl->session_ctx;
// Never cache sessions with empty session IDs.
if (ssl->s3->established_session->session_id_length == 0 ||
ssl->s3->established_session->not_resumable ||
(ctx->session_cache_mode & mode) != mode) {
return;
}
// Clients never use the internal session cache.
int use_internal_cache = ssl->server && !(ctx->session_cache_mode &
SSL_SESS_CACHE_NO_INTERNAL_STORE);
// A client may see new sessions on abbreviated handshakes if the server
// decides to renew the ticket. Once the handshake is completed, it should be
// inserted into the cache.
if (ssl->s3->established_session.get() != ssl->session ||
(!ssl->server && hs->ticket_expected)) {
if (use_internal_cache) {
SSL_CTX_add_session(ctx, ssl->s3->established_session.get());
}
if (ctx->new_session_cb != NULL) {
SSL_SESSION_up_ref(ssl->s3->established_session.get());
if (!ctx->new_session_cb(ssl, ssl->s3->established_session.get())) {
// |new_session_cb|'s return value signals whether it took ownership.
SSL_SESSION_free(ssl->s3->established_session.get());
}
}
}
if (use_internal_cache &&
!(ctx->session_cache_mode & SSL_SESS_CACHE_NO_AUTO_CLEAR)) {
// Automatically flush the internal session cache every 255 connections.
int flush_cache = 0;
CRYPTO_MUTEX_lock_write(&ctx->lock);
ctx->handshakes_since_cache_flush++;
if (ctx->handshakes_since_cache_flush >= 255) {
flush_cache = 1;
ctx->handshakes_since_cache_flush = 0;
}
CRYPTO_MUTEX_unlock_write(&ctx->lock);
if (flush_cache) {
struct OPENSSL_timeval now;
ssl_get_current_time(ssl, &now);
SSL_CTX_flush_sessions(ctx, now.tv_sec);
}
}
}
static int cbb_add_hex(CBB *cbb, const uint8_t *in, size_t in_len) {
static const char hextable[] = "0123456789abcdef";
uint8_t *out;
if (!CBB_add_space(cbb, &out, in_len * 2)) {
return 0;
}
for (size_t i = 0; i < in_len; i++) {
*(out++) = (uint8_t)hextable[in[i] >> 4];
*(out++) = (uint8_t)hextable[in[i] & 0xf];
}
return 1;
}
int ssl_log_secret(const SSL *ssl, const char *label, const uint8_t *secret,
size_t secret_len) {
if (ssl->ctx->keylog_callback == NULL) {
return 1;
}
ScopedCBB cbb;
uint8_t *out;
size_t out_len;
if (!CBB_init(cbb.get(), strlen(label) + 1 + SSL3_RANDOM_SIZE * 2 + 1 +
secret_len * 2 + 1) ||
!CBB_add_bytes(cbb.get(), (const uint8_t *)label, strlen(label)) ||
!CBB_add_bytes(cbb.get(), (const uint8_t *)" ", 1) ||
!cbb_add_hex(cbb.get(), ssl->s3->client_random, SSL3_RANDOM_SIZE) ||
!CBB_add_bytes(cbb.get(), (const uint8_t *)" ", 1) ||
!cbb_add_hex(cbb.get(), secret, secret_len) ||
!CBB_add_u8(cbb.get(), 0 /* NUL */) ||
!CBB_finish(cbb.get(), &out, &out_len)) {
return 0;
}
ssl->ctx->keylog_callback(ssl, (const char *)out);
OPENSSL_free(out);
return 1;
}
void ssl_do_info_callback(const SSL *ssl, int type, int value) {
void (*cb)(const SSL *ssl, int type, int value) = NULL;
if (ssl->info_callback != NULL) {
cb = ssl->info_callback;
} else if (ssl->ctx->info_callback != NULL) {
cb = ssl->ctx->info_callback;
}
if (cb != NULL) {
cb(ssl, type, value);
}
}
void ssl_do_msg_callback(SSL *ssl, int is_write, int content_type,
Span<const uint8_t> in) {
if (ssl->msg_callback == NULL) {
return;
}
// |version| is zero when calling for |SSL3_RT_HEADER| and |SSL2_VERSION| for
// a V2ClientHello.
int version;
switch (content_type) {
case 0:
// V2ClientHello
version = SSL2_VERSION;
break;
case SSL3_RT_HEADER:
version = 0;
break;
default:
version = SSL_version(ssl);
}
ssl->msg_callback(is_write, version, content_type, in.data(), in.size(), ssl,
ssl->msg_callback_arg);
}
void ssl_get_current_time(const SSL *ssl, struct OPENSSL_timeval *out_clock) {
// TODO(martinkr): Change callers to |ssl_ctx_get_current_time| and drop the
// |ssl| arg from |current_time_cb| if possible.
ssl_ctx_get_current_time(ssl->ctx, out_clock);
}
void ssl_ctx_get_current_time(const SSL_CTX *ctx,
struct OPENSSL_timeval *out_clock) {
if (ctx->current_time_cb != NULL) {
// TODO(davidben): Update current_time_cb to use OPENSSL_timeval. See
// https://crbug.com/boringssl/155.
struct timeval clock;
ctx->current_time_cb(nullptr /* ssl */, &clock);
if (clock.tv_sec < 0) {
assert(0);
out_clock->tv_sec = 0;
out_clock->tv_usec = 0;
} else {
out_clock->tv_sec = (uint64_t)clock.tv_sec;
out_clock->tv_usec = (uint32_t)clock.tv_usec;
}
return;
}
#if defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
out_clock->tv_sec = 1234;
out_clock->tv_usec = 1234;
#elif defined(OPENSSL_WINDOWS)
struct _timeb time;
_ftime(&time);
if (time.time < 0) {
assert(0);
out_clock->tv_sec = 0;
out_clock->tv_usec = 0;
} else {
out_clock->tv_sec = time.time;
out_clock->tv_usec = time.millitm * 1000;
}
#else
struct timeval clock;
gettimeofday(&clock, NULL);
if (clock.tv_sec < 0) {
assert(0);
out_clock->tv_sec = 0;
out_clock->tv_usec = 0;
} else {
out_clock->tv_sec = (uint64_t)clock.tv_sec;
out_clock->tv_usec = (uint32_t)clock.tv_usec;
}
#endif
}
void SSL_CTX_set_handoff_mode(SSL_CTX *ctx, bool on) {
ctx->handoff = on;
}
} // namespace bssl
using namespace bssl;
int SSL_library_init(void) {
CRYPTO_library_init();
return 1;
}
int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) {
CRYPTO_library_init();
return 1;
}
static uint32_t ssl_session_hash(const SSL_SESSION *sess) {
const uint8_t *session_id = sess->session_id;
uint8_t tmp_storage[sizeof(uint32_t)];
if (sess->session_id_length < sizeof(tmp_storage)) {
OPENSSL_memset(tmp_storage, 0, sizeof(tmp_storage));
OPENSSL_memcpy(tmp_storage, sess->session_id, sess->session_id_length);
session_id = tmp_storage;
}
uint32_t hash =
((uint32_t)session_id[0]) |
((uint32_t)session_id[1] << 8) |
((uint32_t)session_id[2] << 16) |
((uint32_t)session_id[3] << 24);
return hash;
}
// NB: If this function (or indeed the hash function which uses a sort of
// coarser function than this one) is changed, ensure
// SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
// able to construct an SSL_SESSION that will collide with any existing session
// with a matching session ID.
static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) {
if (a->ssl_version != b->ssl_version) {
return 1;
}
if (a->session_id_length != b->session_id_length) {
return 1;
}
return OPENSSL_memcmp(a->session_id, b->session_id, a->session_id_length);
}
SSL_CTX *SSL_CTX_new(const SSL_METHOD *method) {
SSL_CTX *ret = NULL;
if (method == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_NULL_SSL_METHOD_PASSED);
return NULL;
}
ret = (SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
if (ret == NULL) {
goto err;
}
OPENSSL_memset(ret, 0, sizeof(SSL_CTX));
ret->method = method->method;
ret->x509_method = method->x509_method;
CRYPTO_MUTEX_init(&ret->lock);
ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
ret->session_timeout = SSL_DEFAULT_SESSION_TIMEOUT;
ret->session_psk_dhe_timeout = SSL_DEFAULT_SESSION_PSK_DHE_TIMEOUT;
ret->references = 1;
ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
ret->verify_mode = SSL_VERIFY_NONE;
ret->cert = ssl_cert_new(method->x509_method);
if (ret->cert == NULL) {
goto err;
}
ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
if (ret->sessions == NULL) {
goto err;
}
if (!ret->x509_method->ssl_ctx_new(ret)) {
goto err;
}
if (!SSL_CTX_set_strict_cipher_list(ret, SSL_DEFAULT_CIPHER_LIST)) {
goto err2;
}
ret->client_CA = sk_CRYPTO_BUFFER_new_null();
if (ret->client_CA == NULL) {
goto err;
}
CRYPTO_new_ex_data(&ret->ex_data);
ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
// Disable the auto-chaining feature by default. Once this has stuck without
// problems, the feature will be removed entirely.
ret->mode = SSL_MODE_NO_AUTO_CHAIN;
// Lock the SSL_CTX to the specified version, for compatibility with legacy
// uses of SSL_METHOD.
if (!SSL_CTX_set_max_proto_version(ret, method->version) ||
!SSL_CTX_set_min_proto_version(ret, method->version)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
goto err2;
}
return ret;
err:
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
err2:
SSL_CTX_free(ret);
return NULL;
}
int SSL_CTX_up_ref(SSL_CTX *ctx) {
CRYPTO_refcount_inc(&ctx->references);
return 1;
}
void SSL_CTX_free(SSL_CTX *ctx) {
if (ctx == NULL ||
!CRYPTO_refcount_dec_and_test_zero(&ctx->references)) {
return;
}
// Free internal session cache. However: the remove_cb() may reference the
// ex_data of SSL_CTX, thus the ex_data store can only be removed after the
// sessions were flushed. As the ex_data handling routines might also touch
// the session cache, the most secure solution seems to be: empty (flush) the
// cache, then free ex_data, then finally free the cache. (See ticket
// [openssl.org #212].)
SSL_CTX_flush_sessions(ctx, 0);
CRYPTO_free_ex_data(&g_ex_data_class_ssl_ctx, ctx, &ctx->ex_data);
CRYPTO_MUTEX_cleanup(&ctx->lock);
lh_SSL_SESSION_free(ctx->sessions);
ssl_cipher_preference_list_free(ctx->cipher_list);
ssl_cert_free(ctx->cert);
sk_SSL_CUSTOM_EXTENSION_pop_free(ctx->client_custom_extensions,
SSL_CUSTOM_EXTENSION_free);
sk_SSL_CUSTOM_EXTENSION_pop_free(ctx->server_custom_extensions,
SSL_CUSTOM_EXTENSION_free);
sk_CRYPTO_BUFFER_pop_free(ctx->client_CA, CRYPTO_BUFFER_free);
ctx->x509_method->ssl_ctx_free(ctx);
sk_SRTP_PROTECTION_PROFILE_free(ctx->srtp_profiles);
OPENSSL_free(ctx->psk_identity_hint);
OPENSSL_free(ctx->supported_group_list);
OPENSSL_free(ctx->alpn_client_proto_list);
EVP_PKEY_free(ctx->tlsext_channel_id_private);
OPENSSL_free(ctx->verify_sigalgs);
OPENSSL_free(ctx->tlsext_ticket_key_current);
OPENSSL_free(ctx->tlsext_ticket_key_prev);
OPENSSL_free(ctx);
}
SSL *SSL_new(SSL_CTX *ctx) {
if (ctx == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_NULL_SSL_CTX);
return NULL;
}
if (ctx->method == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
return NULL;
}
SSL *ssl = (SSL *)OPENSSL_malloc(sizeof(SSL));
if (ssl == NULL) {
goto err;
}
OPENSSL_memset(ssl, 0, sizeof(SSL));
ssl->conf_min_version = ctx->conf_min_version;
ssl->conf_max_version = ctx->conf_max_version;
ssl->tls13_variant = ctx->tls13_variant;
// RFC 6347 states that implementations SHOULD use an initial timer value of
// 1 second.
ssl->initial_timeout_duration_ms = 1000;
ssl->options = ctx->options;
ssl->mode = ctx->mode;
ssl->max_cert_list = ctx->max_cert_list;
ssl->cert = ssl_cert_dup(ctx->cert);
if (ssl->cert == NULL) {
goto err;
}
ssl->msg_callback = ctx->msg_callback;
ssl->msg_callback_arg = ctx->msg_callback_arg;
ssl->verify_mode = ctx->verify_mode;
ssl->verify_callback = ctx->default_verify_callback;
ssl->custom_verify_callback = ctx->custom_verify_callback;
ssl->retain_only_sha256_of_client_certs =
ctx->retain_only_sha256_of_client_certs;
ssl->quiet_shutdown = ctx->quiet_shutdown;
ssl->max_send_fragment = ctx->max_send_fragment;
SSL_CTX_up_ref(ctx);
ssl->ctx = ctx;
SSL_CTX_up_ref(ctx);
ssl->session_ctx = ctx;
if (!ssl->ctx->x509_method->ssl_new(ssl)) {
goto err;
}
if (ctx->supported_group_list) {
ssl->supported_group_list = (uint16_t *)BUF_memdup(
ctx->supported_group_list, ctx->supported_group_list_len * 2);
if (!ssl->supported_group_list) {
goto err;
}
ssl->supported_group_list_len = ctx->supported_group_list_len;
}
if (ctx->alpn_client_proto_list) {
ssl->alpn_client_proto_list = (uint8_t *)BUF_memdup(
ctx->alpn_client_proto_list, ctx->alpn_client_proto_list_len);
if (ssl->alpn_client_proto_list == NULL) {
goto err;
}
ssl->alpn_client_proto_list_len = ctx->alpn_client_proto_list_len;
}
ssl->method = ctx->method;
if (!ssl->method->ssl_new(ssl)) {
goto err;
}
CRYPTO_new_ex_data(&ssl->ex_data);
ssl->psk_identity_hint = NULL;
if (ctx->psk_identity_hint) {
ssl->psk_identity_hint = BUF_strdup(ctx->psk_identity_hint);
if (ssl->psk_identity_hint == NULL) {
goto err;
}
}
ssl->psk_client_callback = ctx->psk_client_callback;
ssl->psk_server_callback = ctx->psk_server_callback;
ssl->tlsext_channel_id_enabled = ctx->tlsext_channel_id_enabled;
if (ctx->tlsext_channel_id_private) {
EVP_PKEY_up_ref(ctx->tlsext_channel_id_private);
ssl->tlsext_channel_id_private = ctx->tlsext_channel_id_private;
}
ssl->signed_cert_timestamps_enabled = ctx->signed_cert_timestamps_enabled;
ssl->ocsp_stapling_enabled = ctx->ocsp_stapling_enabled;
ssl->handoff = ctx->handoff;
return ssl;
err:
SSL_free(ssl);
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
return NULL;
}
void SSL_free(SSL *ssl) {
if (ssl == NULL) {
return;
}
if (ssl->ctx != NULL) {
ssl->ctx->x509_method->ssl_free(ssl);
}
CRYPTO_free_ex_data(&g_ex_data_class_ssl, ssl, &ssl->ex_data);
BIO_free_all(ssl->rbio);
BIO_free_all(ssl->wbio);
// add extra stuff
ssl_cipher_preference_list_free(ssl->cipher_list);
SSL_SESSION_free(ssl->session);
ssl_cert_free(ssl->cert);
OPENSSL_free(ssl->tlsext_hostname);
SSL_CTX_free(ssl->session_ctx);
OPENSSL_free(ssl->supported_group_list);
OPENSSL_free(ssl->alpn_client_proto_list);
OPENSSL_free(ssl->token_binding_params);
OPENSSL_free(ssl->quic_transport_params);
EVP_PKEY_free(ssl->tlsext_channel_id_private);
OPENSSL_free(ssl->psk_identity_hint);
sk_CRYPTO_BUFFER_pop_free(ssl->client_CA, CRYPTO_BUFFER_free);
sk_SRTP_PROTECTION_PROFILE_free(ssl->srtp_profiles);
if (ssl->method != NULL) {
ssl->method->ssl_free(ssl);
}
SSL_CTX_free(ssl->ctx);
OPENSSL_free(ssl);
}
void SSL_set_connect_state(SSL *ssl) {
ssl->server = false;
ssl->do_handshake = ssl_client_handshake;
}
void SSL_set_accept_state(SSL *ssl) {
ssl->server = true;
ssl->do_handshake = ssl_server_handshake;
}
void SSL_set0_rbio(SSL *ssl, BIO *rbio) {
BIO_free_all(ssl->rbio);
ssl->rbio = rbio;
}
void SSL_set0_wbio(SSL *ssl, BIO *wbio) {
BIO_free_all(ssl->wbio);
ssl->wbio = wbio;
}
void SSL_set_bio(SSL *ssl, BIO *rbio, BIO *wbio) {
// For historical reasons, this function has many different cases in ownership
// handling.
// If nothing has changed, do nothing
if (rbio == SSL_get_rbio(ssl) && wbio == SSL_get_wbio(ssl)) {
return;
}
// If the two arguments are equal, one fewer reference is granted than
// taken.
if (rbio != NULL && rbio == wbio) {
BIO_up_ref(rbio);
}
// If only the wbio is changed, adopt only one reference.
if (rbio == SSL_get_rbio(ssl)) {
SSL_set0_wbio(ssl, wbio);
return;
}
// There is an asymmetry here for historical reasons. If only the rbio is
// changed AND the rbio and wbio were originally different, then we only adopt
// one reference.
if (wbio == SSL_get_wbio(ssl) && SSL_get_rbio(ssl) != SSL_get_wbio(ssl)) {
SSL_set0_rbio(ssl, rbio);
return;
}
// Otherwise, adopt both references.
SSL_set0_rbio(ssl, rbio);
SSL_set0_wbio(ssl, wbio);
}
BIO *SSL_get_rbio(const SSL *ssl) { return ssl->rbio; }
BIO *SSL_get_wbio(const SSL *ssl) { return ssl->wbio; }
int SSL_do_handshake(SSL *ssl) {
ssl_reset_error_state(ssl);
if (ssl->do_handshake == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_CONNECTION_TYPE_NOT_SET);
return -1;
}
if (!SSL_in_init(ssl)) {
return 1;
}
// Run the handshake.
SSL_HANDSHAKE *hs = ssl->s3->hs.get();
bool early_return = false;
int ret = ssl_run_handshake(hs, &early_return);
ssl_do_info_callback(
ssl, ssl->server ? SSL_CB_ACCEPT_EXIT : SSL_CB_CONNECT_EXIT, ret);
if (ret <= 0) {
return ret;
}
// Destroy the handshake object if the handshake has completely finished.
if (!early_return) {
ssl->s3->hs.reset();
}
return 1;
}
int SSL_connect(SSL *ssl) {
if (ssl->do_handshake == NULL) {
// Not properly initialized yet
SSL_set_connect_state(ssl);
}
return SSL_do_handshake(ssl);
}
int SSL_accept(SSL *ssl) {
if (ssl->do_handshake == NULL) {
// Not properly initialized yet
SSL_set_accept_state(ssl);
}
return SSL_do_handshake(ssl);
}
static int ssl_do_post_handshake(SSL *ssl, const SSLMessage &msg) {
if (ssl_protocol_version(ssl) >= TLS1_3_VERSION) {
return tls13_post_handshake(ssl, msg);
}
// We do not accept renegotiations as a server or SSL 3.0. SSL 3.0 will be
// removed entirely in the future and requires retaining more data for
// renegotiation_info.
if (ssl->server || ssl->version == SSL3_VERSION) {
goto no_renegotiation;
}
if (msg.type != SSL3_MT_HELLO_REQUEST || CBS_len(&msg.body) != 0) {
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_HELLO_REQUEST);
return 0;
}
switch (ssl->renegotiate_mode) {
case ssl_renegotiate_ignore:
// Ignore the HelloRequest.
return 1;
case ssl_renegotiate_once:
if (ssl->s3->total_renegotiations != 0) {
goto no_renegotiation;
}
break;
case ssl_renegotiate_never:
goto no_renegotiation;
case ssl_renegotiate_freely:
break;
}
// Renegotiation is only supported at quiescent points in the application
// protocol, namely in HTTPS, just before reading the HTTP response. Require
// the record-layer be idle and avoid complexities of sending a handshake
// record while an application_data record is being written.
if (!ssl->s3->write_buffer.empty() ||
ssl->s3->write_shutdown != ssl_shutdown_none) {
goto no_renegotiation;
}
// Begin a new handshake.
if (ssl->s3->hs != nullptr) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return 0;
}
ssl->s3->hs = ssl_handshake_new(ssl);
if (ssl->s3->hs == nullptr) {
return 0;
}
ssl->s3->total_renegotiations++;
return 1;
no_renegotiation:
OPENSSL_PUT_ERROR(SSL, SSL_R_NO_RENEGOTIATION);
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_NO_RENEGOTIATION);
return 0;
}
static int ssl_read_impl(SSL *ssl) {
ssl_reset_error_state(ssl);
if (ssl->do_handshake == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_UNINITIALIZED);
return -1;
}
// Replay post-handshake message errors.
if (!check_read_error(ssl)) {
return -1;
}
while (ssl->s3->pending_app_data.empty()) {
// Complete the current handshake, if any. False Start will cause
// |SSL_do_handshake| to return mid-handshake, so this may require multiple
// iterations.
while (!ssl_can_read(ssl)) {
int ret = SSL_do_handshake(ssl);
if (ret < 0) {
return ret;
}
if (ret == 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_HANDSHAKE_FAILURE);
return -1;
}
}
// Process any buffered post-handshake messages.
SSLMessage msg;
if (ssl->method->get_message(ssl, &msg)) {
// If we received an interrupt in early read (EndOfEarlyData), loop again
// for the handshake to process it.
if (SSL_in_init(ssl)) {
ssl->s3->hs->can_early_read = false;
continue;
}
// Handle the post-handshake message and try again.