| /* 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) 1998-2006 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 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/err.h> |
| #include <openssl/lhash.h> |
| #include <openssl/mem.h> |
| #include <openssl/rand.h> |
| |
| #include "internal.h" |
| #include "../crypto/internal.h" |
| |
| |
| /* The address of this is a magic value, a pointer to which is returned by |
| * SSL_magic_pending_session_ptr(). It allows a session callback to indicate |
| * that it needs to asynchronously fetch session information. */ |
| static const char g_pending_session_magic = 0; |
| |
| static CRYPTO_EX_DATA_CLASS g_ex_data_class = |
| CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA; |
| |
| static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session); |
| static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session); |
| static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock); |
| |
| SSL_SESSION *ssl_session_new(const SSL_X509_METHOD *x509_method) { |
| SSL_SESSION *session = OPENSSL_malloc(sizeof(SSL_SESSION)); |
| if (session == NULL) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| OPENSSL_memset(session, 0, sizeof(SSL_SESSION)); |
| |
| session->x509_method = x509_method; |
| session->verify_result = X509_V_ERR_INVALID_CALL; |
| session->references = 1; |
| session->timeout = SSL_DEFAULT_SESSION_TIMEOUT; |
| session->auth_timeout = SSL_DEFAULT_SESSION_TIMEOUT; |
| session->time = time(NULL); |
| CRYPTO_new_ex_data(&session->ex_data); |
| return session; |
| } |
| |
| SSL_SESSION *SSL_SESSION_new(const SSL_CTX *ctx) { |
| return ssl_session_new(ctx->x509_method); |
| } |
| |
| SSL_SESSION *SSL_SESSION_dup(SSL_SESSION *session, int dup_flags) { |
| SSL_SESSION *new_session = ssl_session_new(session->x509_method); |
| if (new_session == NULL) { |
| goto err; |
| } |
| |
| new_session->is_server = session->is_server; |
| new_session->ssl_version = session->ssl_version; |
| new_session->sid_ctx_length = session->sid_ctx_length; |
| OPENSSL_memcpy(new_session->sid_ctx, session->sid_ctx, session->sid_ctx_length); |
| |
| /* Copy the key material. */ |
| new_session->master_key_length = session->master_key_length; |
| OPENSSL_memcpy(new_session->master_key, session->master_key, |
| session->master_key_length); |
| new_session->cipher = session->cipher; |
| |
| /* Copy authentication state. */ |
| if (session->psk_identity != NULL) { |
| new_session->psk_identity = BUF_strdup(session->psk_identity); |
| if (new_session->psk_identity == NULL) { |
| goto err; |
| } |
| } |
| if (session->certs != NULL) { |
| new_session->certs = sk_CRYPTO_BUFFER_new_null(); |
| if (new_session->certs == NULL) { |
| goto err; |
| } |
| for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(session->certs); i++) { |
| CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(session->certs, i); |
| if (!sk_CRYPTO_BUFFER_push(new_session->certs, buffer)) { |
| goto err; |
| } |
| CRYPTO_BUFFER_up_ref(buffer); |
| } |
| } |
| |
| if (!session->x509_method->session_dup(new_session, session)) { |
| goto err; |
| } |
| |
| new_session->verify_result = session->verify_result; |
| |
| new_session->ocsp_response_length = session->ocsp_response_length; |
| if (session->ocsp_response != NULL) { |
| new_session->ocsp_response = BUF_memdup(session->ocsp_response, |
| session->ocsp_response_length); |
| if (new_session->ocsp_response == NULL) { |
| goto err; |
| } |
| } |
| |
| new_session->tlsext_signed_cert_timestamp_list_length = |
| session->tlsext_signed_cert_timestamp_list_length; |
| if (session->tlsext_signed_cert_timestamp_list != NULL) { |
| new_session->tlsext_signed_cert_timestamp_list = |
| BUF_memdup(session->tlsext_signed_cert_timestamp_list, |
| session->tlsext_signed_cert_timestamp_list_length); |
| if (new_session->tlsext_signed_cert_timestamp_list == NULL) { |
| goto err; |
| } |
| } |
| |
| OPENSSL_memcpy(new_session->peer_sha256, session->peer_sha256, |
| SHA256_DIGEST_LENGTH); |
| new_session->peer_sha256_valid = session->peer_sha256_valid; |
| |
| if (session->tlsext_hostname != NULL) { |
| new_session->tlsext_hostname = BUF_strdup(session->tlsext_hostname); |
| if (new_session->tlsext_hostname == NULL) { |
| goto err; |
| } |
| } |
| |
| new_session->peer_signature_algorithm = session->peer_signature_algorithm; |
| |
| new_session->timeout = session->timeout; |
| new_session->auth_timeout = session->auth_timeout; |
| new_session->time = session->time; |
| |
| /* Copy non-authentication connection properties. */ |
| if (dup_flags & SSL_SESSION_INCLUDE_NONAUTH) { |
| new_session->session_id_length = session->session_id_length; |
| OPENSSL_memcpy(new_session->session_id, session->session_id, |
| session->session_id_length); |
| |
| new_session->group_id = session->group_id; |
| |
| OPENSSL_memcpy(new_session->original_handshake_hash, |
| session->original_handshake_hash, |
| session->original_handshake_hash_len); |
| new_session->original_handshake_hash_len = |
| session->original_handshake_hash_len; |
| new_session->tlsext_tick_lifetime_hint = session->tlsext_tick_lifetime_hint; |
| new_session->ticket_age_add = session->ticket_age_add; |
| new_session->ticket_max_early_data = session->ticket_max_early_data; |
| new_session->extended_master_secret = session->extended_master_secret; |
| |
| if (session->early_alpn != NULL) { |
| new_session->early_alpn = |
| BUF_memdup(session->early_alpn, session->early_alpn_len); |
| if (new_session->early_alpn == NULL) { |
| goto err; |
| } |
| } |
| new_session->early_alpn_len = session->early_alpn_len; |
| } |
| |
| /* Copy the ticket. */ |
| if (dup_flags & SSL_SESSION_INCLUDE_TICKET) { |
| if (session->tlsext_tick != NULL) { |
| new_session->tlsext_tick = |
| BUF_memdup(session->tlsext_tick, session->tlsext_ticklen); |
| if (new_session->tlsext_tick == NULL) { |
| goto err; |
| } |
| } |
| new_session->tlsext_ticklen = session->tlsext_ticklen; |
| } |
| |
| /* The new_session does not get a copy of the ex_data. */ |
| |
| new_session->not_resumable = 1; |
| return new_session; |
| |
| err: |
| SSL_SESSION_free(new_session); |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| |
| void ssl_session_rebase_time(SSL *ssl, SSL_SESSION *session) { |
| struct OPENSSL_timeval now; |
| ssl_get_current_time(ssl, &now); |
| |
| /* To avoid overflows and underflows, if we've gone back in time, update the |
| * time, but mark the session expired. */ |
| if (session->time > now.tv_sec) { |
| session->time = now.tv_sec; |
| session->timeout = 0; |
| session->auth_timeout = 0; |
| return; |
| } |
| |
| /* Adjust the session time and timeouts. If the session has already expired, |
| * clamp the timeouts at zero. */ |
| uint64_t delta = now.tv_sec - session->time; |
| session->time = now.tv_sec; |
| if (session->timeout < delta) { |
| session->timeout = 0; |
| } else { |
| session->timeout -= delta; |
| } |
| if (session->auth_timeout < delta) { |
| session->auth_timeout = 0; |
| } else { |
| session->auth_timeout -= delta; |
| } |
| } |
| |
| void ssl_session_renew_timeout(SSL *ssl, SSL_SESSION *session, |
| uint32_t timeout) { |
| /* Rebase the timestamp relative to the current time so |timeout| is measured |
| * correctly. */ |
| ssl_session_rebase_time(ssl, session); |
| |
| if (session->timeout > timeout) { |
| return; |
| } |
| |
| session->timeout = timeout; |
| if (session->timeout > session->auth_timeout) { |
| session->timeout = session->auth_timeout; |
| } |
| } |
| |
| int SSL_SESSION_up_ref(SSL_SESSION *session) { |
| CRYPTO_refcount_inc(&session->references); |
| return 1; |
| } |
| |
| void SSL_SESSION_free(SSL_SESSION *session) { |
| if (session == NULL || |
| !CRYPTO_refcount_dec_and_test_zero(&session->references)) { |
| return; |
| } |
| |
| CRYPTO_free_ex_data(&g_ex_data_class, session, &session->ex_data); |
| |
| OPENSSL_cleanse(session->master_key, sizeof(session->master_key)); |
| OPENSSL_cleanse(session->session_id, sizeof(session->session_id)); |
| sk_CRYPTO_BUFFER_pop_free(session->certs, CRYPTO_BUFFER_free); |
| session->x509_method->session_clear(session); |
| OPENSSL_free(session->tlsext_hostname); |
| OPENSSL_free(session->tlsext_tick); |
| OPENSSL_free(session->tlsext_signed_cert_timestamp_list); |
| OPENSSL_free(session->ocsp_response); |
| OPENSSL_free(session->psk_identity); |
| OPENSSL_free(session->early_alpn); |
| OPENSSL_cleanse(session, sizeof(*session)); |
| OPENSSL_free(session); |
| } |
| |
| const uint8_t *SSL_SESSION_get_id(const SSL_SESSION *session, |
| unsigned *out_len) { |
| if (out_len != NULL) { |
| *out_len = session->session_id_length; |
| } |
| return session->session_id; |
| } |
| |
| uint32_t SSL_SESSION_get_timeout(const SSL_SESSION *session) { |
| return session->timeout; |
| } |
| |
| uint64_t SSL_SESSION_get_time(const SSL_SESSION *session) { |
| if (session == NULL) { |
| /* NULL should crash, but silently accept it here for compatibility. */ |
| return 0; |
| } |
| return session->time; |
| } |
| |
| X509 *SSL_SESSION_get0_peer(const SSL_SESSION *session) { |
| return session->x509_peer; |
| } |
| |
| size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, uint8_t *out, |
| size_t max_out) { |
| /* TODO(davidben): Fix master_key_length's type and remove these casts. */ |
| if (max_out == 0) { |
| return (size_t)session->master_key_length; |
| } |
| if (max_out > (size_t)session->master_key_length) { |
| max_out = (size_t)session->master_key_length; |
| } |
| OPENSSL_memcpy(out, session->master_key, max_out); |
| return max_out; |
| } |
| |
| uint64_t SSL_SESSION_set_time(SSL_SESSION *session, uint64_t time) { |
| if (session == NULL) { |
| return 0; |
| } |
| |
| session->time = time; |
| return time; |
| } |
| |
| uint32_t SSL_SESSION_set_timeout(SSL_SESSION *session, uint32_t timeout) { |
| if (session == NULL) { |
| return 0; |
| } |
| |
| session->timeout = timeout; |
| session->auth_timeout = timeout; |
| return 1; |
| } |
| |
| int SSL_SESSION_set1_id_context(SSL_SESSION *session, const uint8_t *sid_ctx, |
| size_t sid_ctx_len) { |
| if (sid_ctx_len > sizeof(session->sid_ctx)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); |
| return 0; |
| } |
| |
| assert(sizeof(session->sid_ctx) < 256); |
| session->sid_ctx_length = (uint8_t)sid_ctx_len; |
| OPENSSL_memcpy(session->sid_ctx, sid_ctx, sid_ctx_len); |
| |
| return 1; |
| } |
| |
| SSL_SESSION *SSL_magic_pending_session_ptr(void) { |
| return (SSL_SESSION *)&g_pending_session_magic; |
| } |
| |
| SSL_SESSION *SSL_get_session(const SSL *ssl) { |
| /* Once the handshake completes we return the established session. Otherwise |
| * we return the intermediate session, either |session| (for resumption) or |
| * |new_session| if doing a full handshake. */ |
| if (!SSL_in_init(ssl)) { |
| return ssl->s3->established_session; |
| } |
| if (ssl->s3->hs->new_session != NULL) { |
| return ssl->s3->hs->new_session; |
| } |
| return ssl->session; |
| } |
| |
| SSL_SESSION *SSL_get1_session(SSL *ssl) { |
| SSL_SESSION *ret = SSL_get_session(ssl); |
| if (ret != NULL) { |
| SSL_SESSION_up_ref(ret); |
| } |
| return ret; |
| } |
| |
| int SSL_SESSION_get_ex_new_index(long argl, void *argp, |
| CRYPTO_EX_unused *unused, |
| CRYPTO_EX_dup *dup_func, |
| CRYPTO_EX_free *free_func) { |
| int index; |
| if (!CRYPTO_get_ex_new_index(&g_ex_data_class, &index, argl, argp, dup_func, |
| free_func)) { |
| return -1; |
| } |
| return index; |
| } |
| |
| int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx, void *arg) { |
| return CRYPTO_set_ex_data(&session->ex_data, idx, arg); |
| } |
| |
| void *SSL_SESSION_get_ex_data(const SSL_SESSION *session, int idx) { |
| return CRYPTO_get_ex_data(&session->ex_data, idx); |
| } |
| |
| const EVP_MD *SSL_SESSION_get_digest(const SSL_SESSION *session, |
| const SSL *ssl) { |
| uint16_t version; |
| if (!ssl->method->version_from_wire(&version, session->ssl_version)) { |
| return NULL; |
| } |
| |
| return ssl_get_handshake_digest(session->cipher->algorithm_prf, version); |
| } |
| |
| int ssl_get_new_session(SSL_HANDSHAKE *hs, int is_server) { |
| SSL *const ssl = hs->ssl; |
| if (ssl->mode & SSL_MODE_NO_SESSION_CREATION) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_SESSION_MAY_NOT_BE_CREATED); |
| return 0; |
| } |
| |
| SSL_SESSION *session = ssl_session_new(ssl->ctx->x509_method); |
| if (session == NULL) { |
| return 0; |
| } |
| |
| session->is_server = is_server; |
| session->ssl_version = ssl->version; |
| |
| /* Fill in the time from the |SSL_CTX|'s clock. */ |
| struct OPENSSL_timeval now; |
| ssl_get_current_time(ssl, &now); |
| session->time = now.tv_sec; |
| |
| uint16_t version = ssl3_protocol_version(ssl); |
| if (version >= TLS1_3_VERSION) { |
| /* TLS 1.3 uses tickets as authenticators, so we are willing to use them for |
| * longer. */ |
| session->timeout = ssl->session_ctx->session_psk_dhe_timeout; |
| session->auth_timeout = SSL_DEFAULT_SESSION_AUTH_TIMEOUT; |
| } else { |
| /* TLS 1.2 resumption does not incorporate new key material, so we use a |
| * much shorter timeout. */ |
| session->timeout = ssl->session_ctx->session_timeout; |
| session->auth_timeout = ssl->session_ctx->session_timeout; |
| } |
| |
| if (is_server) { |
| if (hs->ticket_expected || version >= TLS1_3_VERSION) { |
| /* Don't set session IDs for sessions resumed with tickets. This will keep |
| * them out of the session cache. */ |
| session->session_id_length = 0; |
| } else { |
| session->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; |
| if (!RAND_bytes(session->session_id, session->session_id_length)) { |
| goto err; |
| } |
| } |
| } else { |
| session->session_id_length = 0; |
| } |
| |
| if (ssl->cert->sid_ctx_length > sizeof(session->sid_ctx)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| goto err; |
| } |
| OPENSSL_memcpy(session->sid_ctx, ssl->cert->sid_ctx, |
| ssl->cert->sid_ctx_length); |
| session->sid_ctx_length = ssl->cert->sid_ctx_length; |
| |
| /* The session is marked not resumable until it is completely filled in. */ |
| session->not_resumable = 1; |
| session->verify_result = X509_V_ERR_INVALID_CALL; |
| |
| SSL_SESSION_free(hs->new_session); |
| hs->new_session = session; |
| ssl_set_session(ssl, NULL); |
| return 1; |
| |
| err: |
| SSL_SESSION_free(session); |
| return 0; |
| } |
| |
| static int ssl_encrypt_ticket_with_cipher_ctx(SSL *ssl, CBB *out, |
| const uint8_t *session_buf, |
| size_t session_len) { |
| int ret = 0; |
| |
| EVP_CIPHER_CTX ctx; |
| EVP_CIPHER_CTX_init(&ctx); |
| HMAC_CTX hctx; |
| HMAC_CTX_init(&hctx); |
| |
| /* If the session is too long, emit a dummy value rather than abort the |
| * connection. */ |
| static const size_t kMaxTicketOverhead = |
| 16 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE; |
| if (session_len > 0xffff - kMaxTicketOverhead) { |
| static const char kTicketPlaceholder[] = "TICKET TOO LARGE"; |
| if (CBB_add_bytes(out, (const uint8_t *)kTicketPlaceholder, |
| strlen(kTicketPlaceholder))) { |
| ret = 1; |
| } |
| goto err; |
| } |
| |
| /* Initialize HMAC and cipher contexts. If callback present it does all the |
| * work otherwise use generated values from parent ctx. */ |
| SSL_CTX *tctx = ssl->session_ctx; |
| uint8_t iv[EVP_MAX_IV_LENGTH]; |
| uint8_t key_name[16]; |
| if (tctx->tlsext_ticket_key_cb != NULL) { |
| if (tctx->tlsext_ticket_key_cb(ssl, key_name, iv, &ctx, &hctx, |
| 1 /* encrypt */) < 0) { |
| goto err; |
| } |
| } else { |
| if (!RAND_bytes(iv, 16) || |
| !EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, |
| tctx->tlsext_tick_aes_key, iv) || |
| !HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, tlsext_tick_md(), |
| NULL)) { |
| goto err; |
| } |
| OPENSSL_memcpy(key_name, tctx->tlsext_tick_key_name, 16); |
| } |
| |
| uint8_t *ptr; |
| if (!CBB_add_bytes(out, key_name, 16) || |
| !CBB_add_bytes(out, iv, EVP_CIPHER_CTX_iv_length(&ctx)) || |
| !CBB_reserve(out, &ptr, session_len + EVP_MAX_BLOCK_LENGTH)) { |
| goto err; |
| } |
| |
| size_t total = 0; |
| #if defined(BORINGSSL_UNSAFE_FUZZER_MODE) |
| OPENSSL_memcpy(ptr, session_buf, session_len); |
| total = session_len; |
| #else |
| int len; |
| if (!EVP_EncryptUpdate(&ctx, ptr + total, &len, session_buf, session_len)) { |
| goto err; |
| } |
| total += len; |
| if (!EVP_EncryptFinal_ex(&ctx, ptr + total, &len)) { |
| goto err; |
| } |
| total += len; |
| #endif |
| if (!CBB_did_write(out, total)) { |
| goto err; |
| } |
| |
| unsigned hlen; |
| if (!HMAC_Update(&hctx, CBB_data(out), CBB_len(out)) || |
| !CBB_reserve(out, &ptr, EVP_MAX_MD_SIZE) || |
| !HMAC_Final(&hctx, ptr, &hlen) || |
| !CBB_did_write(out, hlen)) { |
| goto err; |
| } |
| |
| ret = 1; |
| |
| err: |
| EVP_CIPHER_CTX_cleanup(&ctx); |
| HMAC_CTX_cleanup(&hctx); |
| return ret; |
| } |
| |
| static int ssl_encrypt_ticket_with_method(SSL *ssl, CBB *out, |
| const uint8_t *session_buf, |
| size_t session_len) { |
| const SSL_TICKET_AEAD_METHOD *method = ssl->session_ctx->ticket_aead_method; |
| const size_t max_overhead = method->max_overhead(ssl); |
| const size_t max_out = session_len + max_overhead; |
| if (max_out < max_overhead) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); |
| return 0; |
| } |
| |
| uint8_t *ptr; |
| if (!CBB_reserve(out, &ptr, max_out)) { |
| return 0; |
| } |
| |
| size_t out_len; |
| if (!method->seal(ssl, ptr, &out_len, max_out, session_buf, session_len)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_TICKET_ENCRYPTION_FAILED); |
| return 0; |
| } |
| |
| if (!CBB_did_write(out, out_len)) { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| int ssl_encrypt_ticket(SSL *ssl, CBB *out, const SSL_SESSION *session) { |
| /* Serialize the SSL_SESSION to be encoded into the ticket. */ |
| uint8_t *session_buf = NULL; |
| size_t session_len; |
| if (!SSL_SESSION_to_bytes_for_ticket(session, &session_buf, &session_len)) { |
| return -1; |
| } |
| |
| int ret = 0; |
| if (ssl->session_ctx->ticket_aead_method) { |
| ret = ssl_encrypt_ticket_with_method(ssl, out, session_buf, session_len); |
| } else { |
| ret = |
| ssl_encrypt_ticket_with_cipher_ctx(ssl, out, session_buf, session_len); |
| } |
| |
| OPENSSL_free(session_buf); |
| return ret; |
| } |
| |
| int ssl_session_is_context_valid(const SSL *ssl, const SSL_SESSION *session) { |
| if (session == NULL) { |
| return 0; |
| } |
| |
| return session->sid_ctx_length == ssl->cert->sid_ctx_length && |
| OPENSSL_memcmp(session->sid_ctx, ssl->cert->sid_ctx, |
| ssl->cert->sid_ctx_length) == 0; |
| } |
| |
| int ssl_session_is_time_valid(const SSL *ssl, const SSL_SESSION *session) { |
| if (session == NULL) { |
| return 0; |
| } |
| |
| struct OPENSSL_timeval now; |
| ssl_get_current_time(ssl, &now); |
| |
| /* Reject tickets from the future to avoid underflow. */ |
| if (now.tv_sec < session->time) { |
| return 0; |
| } |
| |
| return session->timeout > now.tv_sec - session->time; |
| } |
| |
| int ssl_session_is_resumable(const SSL_HANDSHAKE *hs, |
| const SSL_SESSION *session) { |
| const SSL *const ssl = hs->ssl; |
| return ssl_session_is_context_valid(ssl, session) && |
| /* The session must have been created by the same type of end point as |
| * we're now using it with. */ |
| ssl->server == session->is_server && |
| /* The session must not be expired. */ |
| ssl_session_is_time_valid(ssl, session) && |
| /* Only resume if the session's version matches the negotiated |
| * version. */ |
| ssl->version == session->ssl_version && |
| /* Only resume if the session's cipher matches the negotiated one. */ |
| hs->new_cipher == session->cipher && |
| /* If the session contains a client certificate (either the full |
| * certificate or just the hash) then require that the form of the |
| * certificate matches the current configuration. */ |
| ((sk_CRYPTO_BUFFER_num(session->certs) == 0 && |
| !session->peer_sha256_valid) || |
| session->peer_sha256_valid == |
| ssl->retain_only_sha256_of_client_certs); |
| } |
| |
| /* ssl_lookup_session looks up |session_id| in the session cache and sets |
| * |*out_session| to an |SSL_SESSION| object if found. The caller takes |
| * ownership of the result. */ |
| static enum ssl_session_result_t ssl_lookup_session( |
| SSL *ssl, SSL_SESSION **out_session, const uint8_t *session_id, |
| size_t session_id_len) { |
| *out_session = NULL; |
| |
| if (session_id_len == 0 || session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { |
| return ssl_session_success; |
| } |
| |
| SSL_SESSION *session = NULL; |
| /* Try the internal cache, if it exists. */ |
| if (!(ssl->session_ctx->session_cache_mode & |
| SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { |
| SSL_SESSION data; |
| data.ssl_version = ssl->version; |
| data.session_id_length = session_id_len; |
| OPENSSL_memcpy(data.session_id, session_id, session_id_len); |
| |
| CRYPTO_MUTEX_lock_read(&ssl->session_ctx->lock); |
| session = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &data); |
| if (session != NULL) { |
| SSL_SESSION_up_ref(session); |
| } |
| /* TODO(davidben): This should probably move it to the front of the list. */ |
| CRYPTO_MUTEX_unlock_read(&ssl->session_ctx->lock); |
| } |
| |
| /* Fall back to the external cache, if it exists. */ |
| if (session == NULL && |
| ssl->session_ctx->get_session_cb != NULL) { |
| int copy = 1; |
| session = ssl->session_ctx->get_session_cb(ssl, (uint8_t *)session_id, |
| session_id_len, ©); |
| |
| if (session == NULL) { |
| return ssl_session_success; |
| } |
| |
| if (session == SSL_magic_pending_session_ptr()) { |
| return ssl_session_retry; |
| } |
| |
| /* Increment reference count now if the session callback asks us to do so |
| * (note that if the session structures returned by the callback are shared |
| * between threads, it must handle the reference count itself [i.e. copy == |
| * 0], or things won't be thread-safe). */ |
| if (copy) { |
| SSL_SESSION_up_ref(session); |
| } |
| |
| /* Add the externally cached session to the internal cache if necessary. */ |
| if (!(ssl->session_ctx->session_cache_mode & |
| SSL_SESS_CACHE_NO_INTERNAL_STORE)) { |
| SSL_CTX_add_session(ssl->session_ctx, session); |
| } |
| } |
| |
| if (session != NULL && |
| !ssl_session_is_time_valid(ssl, session)) { |
| /* The session was from the cache, so remove it. */ |
| SSL_CTX_remove_session(ssl->session_ctx, session); |
| SSL_SESSION_free(session); |
| session = NULL; |
| } |
| |
| *out_session = session; |
| return ssl_session_success; |
| } |
| |
| enum ssl_session_result_t ssl_get_prev_session( |
| SSL *ssl, SSL_SESSION **out_session, int *out_tickets_supported, |
| int *out_renew_ticket, const SSL_CLIENT_HELLO *client_hello) { |
| /* This is used only by servers. */ |
| assert(ssl->server); |
| SSL_SESSION *session = NULL; |
| int renew_ticket = 0; |
| |
| /* If tickets are disabled, always behave as if no tickets are present. */ |
| const uint8_t *ticket = NULL; |
| size_t ticket_len = 0; |
| const int tickets_supported = |
| !(SSL_get_options(ssl) & SSL_OP_NO_TICKET) && |
| ssl->version > SSL3_VERSION && |
| SSL_early_callback_ctx_extension_get( |
| client_hello, TLSEXT_TYPE_session_ticket, &ticket, &ticket_len); |
| if (tickets_supported && ticket_len > 0) { |
| switch (ssl_process_ticket(ssl, &session, &renew_ticket, ticket, ticket_len, |
| client_hello->session_id, |
| client_hello->session_id_len)) { |
| case ssl_ticket_aead_success: |
| break; |
| case ssl_ticket_aead_ignore_ticket: |
| assert(session == NULL); |
| break; |
| case ssl_ticket_aead_error: |
| return ssl_session_error; |
| case ssl_ticket_aead_retry: |
| return ssl_session_ticket_retry; |
| } |
| } else { |
| /* The client didn't send a ticket, so the session ID is a real ID. */ |
| enum ssl_session_result_t lookup_ret = ssl_lookup_session( |
| ssl, &session, client_hello->session_id, client_hello->session_id_len); |
| if (lookup_ret != ssl_session_success) { |
| return lookup_ret; |
| } |
| } |
| |
| *out_session = session; |
| *out_tickets_supported = tickets_supported; |
| *out_renew_ticket = renew_ticket; |
| return ssl_session_success; |
| } |
| |
| int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *session) { |
| /* Although |session| is inserted into two structures (a doubly-linked list |
| * and the hash table), |ctx| only takes one reference. */ |
| SSL_SESSION_up_ref(session); |
| |
| SSL_SESSION *old_session; |
| CRYPTO_MUTEX_lock_write(&ctx->lock); |
| if (!lh_SSL_SESSION_insert(ctx->sessions, &old_session, session)) { |
| CRYPTO_MUTEX_unlock_write(&ctx->lock); |
| SSL_SESSION_free(session); |
| return 0; |
| } |
| |
| if (old_session != NULL) { |
| if (old_session == session) { |
| /* |session| was already in the cache. */ |
| CRYPTO_MUTEX_unlock_write(&ctx->lock); |
| SSL_SESSION_free(old_session); |
| return 0; |
| } |
| |
| /* There was a session ID collision. |old_session| must be removed from |
| * the linked list and released. */ |
| SSL_SESSION_list_remove(ctx, old_session); |
| SSL_SESSION_free(old_session); |
| } |
| |
| SSL_SESSION_list_add(ctx, session); |
| |
| /* Enforce any cache size limits. */ |
| if (SSL_CTX_sess_get_cache_size(ctx) > 0) { |
| while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) { |
| if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) { |
| break; |
| } |
| } |
| } |
| |
| CRYPTO_MUTEX_unlock_write(&ctx->lock); |
| return 1; |
| } |
| |
| int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *session) { |
| return remove_session_lock(ctx, session, 1); |
| } |
| |
| static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock) { |
| int ret = 0; |
| |
| if (session != NULL && session->session_id_length != 0) { |
| if (lock) { |
| CRYPTO_MUTEX_lock_write(&ctx->lock); |
| } |
| SSL_SESSION *found_session = lh_SSL_SESSION_retrieve(ctx->sessions, |
| session); |
| if (found_session == session) { |
| ret = 1; |
| found_session = lh_SSL_SESSION_delete(ctx->sessions, session); |
| SSL_SESSION_list_remove(ctx, session); |
| } |
| |
| if (lock) { |
| CRYPTO_MUTEX_unlock_write(&ctx->lock); |
| } |
| |
| if (ret) { |
| found_session->not_resumable = 1; |
| if (ctx->remove_session_cb != NULL) { |
| ctx->remove_session_cb(ctx, found_session); |
| } |
| SSL_SESSION_free(found_session); |
| } |
| } |
| |
| return ret; |
| } |
| |
| int SSL_set_session(SSL *ssl, SSL_SESSION *session) { |
| /* SSL_set_session may only be called before the handshake has started. */ |
| if (ssl->s3->initial_handshake_complete || |
| ssl->s3->hs == NULL || |
| ssl->s3->hs->state != SSL_ST_INIT) { |
| abort(); |
| } |
| |
| ssl_set_session(ssl, session); |
| return 1; |
| } |
| |
| void ssl_set_session(SSL *ssl, SSL_SESSION *session) { |
| if (ssl->session == session) { |
| return; |
| } |
| |
| SSL_SESSION_free(ssl->session); |
| ssl->session = session; |
| if (session != NULL) { |
| SSL_SESSION_up_ref(session); |
| } |
| } |
| |
| uint32_t SSL_CTX_set_timeout(SSL_CTX *ctx, uint32_t timeout) { |
| if (ctx == NULL) { |
| return 0; |
| } |
| |
| /* Historically, zero was treated as |SSL_DEFAULT_SESSION_TIMEOUT|. */ |
| if (timeout == 0) { |
| timeout = SSL_DEFAULT_SESSION_TIMEOUT; |
| } |
| |
| uint32_t old_timeout = ctx->session_timeout; |
| ctx->session_timeout = timeout; |
| return old_timeout; |
| } |
| |
| uint32_t SSL_CTX_get_timeout(const SSL_CTX *ctx) { |
| if (ctx == NULL) { |
| return 0; |
| } |
| |
| return ctx->session_timeout; |
| } |
| |
| void SSL_CTX_set_session_psk_dhe_timeout(SSL_CTX *ctx, uint32_t timeout) { |
| ctx->session_psk_dhe_timeout = timeout; |
| } |
| |
| typedef struct timeout_param_st { |
| SSL_CTX *ctx; |
| uint64_t time; |
| LHASH_OF(SSL_SESSION) *cache; |
| } TIMEOUT_PARAM; |
| |
| static void timeout_doall_arg(SSL_SESSION *session, void *void_param) { |
| TIMEOUT_PARAM *param = void_param; |
| |
| if (param->time == 0 || |
| session->time + session->timeout < session->time || |
| param->time > (session->time + session->timeout)) { |
| /* timeout */ |
| /* The reason we don't call SSL_CTX_remove_session() is to |
| * save on locking overhead */ |
| (void) lh_SSL_SESSION_delete(param->cache, session); |
| SSL_SESSION_list_remove(param->ctx, session); |
| session->not_resumable = 1; |
| if (param->ctx->remove_session_cb != NULL) { |
| param->ctx->remove_session_cb(param->ctx, session); |
| } |
| SSL_SESSION_free(session); |
| } |
| } |
| |
| void SSL_CTX_flush_sessions(SSL_CTX *ctx, uint64_t time) { |
| TIMEOUT_PARAM tp; |
| |
| tp.ctx = ctx; |
| tp.cache = ctx->sessions; |
| if (tp.cache == NULL) { |
| return; |
| } |
| tp.time = time; |
| CRYPTO_MUTEX_lock_write(&ctx->lock); |
| lh_SSL_SESSION_doall_arg(tp.cache, timeout_doall_arg, &tp); |
| CRYPTO_MUTEX_unlock_write(&ctx->lock); |
| } |
| |
| /* locked by SSL_CTX in the calling function */ |
| static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session) { |
| if (session->next == NULL || session->prev == NULL) { |
| return; |
| } |
| |
| if (session->next == (SSL_SESSION *)&ctx->session_cache_tail) { |
| /* last element in list */ |
| if (session->prev == (SSL_SESSION *)&ctx->session_cache_head) { |
| /* only one element in list */ |
| ctx->session_cache_head = NULL; |
| ctx->session_cache_tail = NULL; |
| } else { |
| ctx->session_cache_tail = session->prev; |
| session->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); |
| } |
| } else { |
| if (session->prev == (SSL_SESSION *)&ctx->session_cache_head) { |
| /* first element in list */ |
| ctx->session_cache_head = session->next; |
| session->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); |
| } else { /* middle of list */ |
| session->next->prev = session->prev; |
| session->prev->next = session->next; |
| } |
| } |
| session->prev = session->next = NULL; |
| } |
| |
| static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session) { |
| if (session->next != NULL && session->prev != NULL) { |
| SSL_SESSION_list_remove(ctx, session); |
| } |
| |
| if (ctx->session_cache_head == NULL) { |
| ctx->session_cache_head = session; |
| ctx->session_cache_tail = session; |
| session->prev = (SSL_SESSION *)&(ctx->session_cache_head); |
| session->next = (SSL_SESSION *)&(ctx->session_cache_tail); |
| } else { |
| session->next = ctx->session_cache_head; |
| session->next->prev = session; |
| session->prev = (SSL_SESSION *)&(ctx->session_cache_head); |
| ctx->session_cache_head = session; |
| } |
| } |
| |
| void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
| int (*cb)(SSL *ssl, SSL_SESSION *session)) { |
| ctx->new_session_cb = cb; |
| } |
| |
| int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *session) { |
| return ctx->new_session_cb; |
| } |
| |
| void SSL_CTX_sess_set_remove_cb( |
| SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *session)) { |
| ctx->remove_session_cb = cb; |
| } |
| |
| void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX *ctx, |
| SSL_SESSION *session) { |
| return ctx->remove_session_cb; |
| } |
| |
| void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, |
| SSL_SESSION *(*cb)(SSL *ssl, |
| uint8_t *id, int id_len, |
| int *out_copy)) { |
| ctx->get_session_cb = cb; |
| } |
| |
| SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))( |
| SSL *ssl, uint8_t *id, int id_len, int *out_copy) { |
| return ctx->get_session_cb; |
| } |
| |
| void SSL_CTX_set_info_callback( |
| SSL_CTX *ctx, void (*cb)(const SSL *ssl, int type, int value)) { |
| ctx->info_callback = cb; |
| } |
| |
| void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, |
| int value) { |
| return ctx->info_callback; |
| } |
| |
| void SSL_CTX_set_channel_id_cb(SSL_CTX *ctx, |
| void (*cb)(SSL *ssl, EVP_PKEY **pkey)) { |
| ctx->channel_id_cb = cb; |
| } |
| |
| void (*SSL_CTX_get_channel_id_cb(SSL_CTX *ctx))(SSL *ssl, EVP_PKEY **pkey) { |
| return ctx->channel_id_cb; |
| } |