| /* 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 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 <stdio.h> |
| #include "ssl_locl.h" |
| #include <openssl/comp.h> |
| #include <openssl/evp.h> |
| #include <openssl/kdf.h> |
| #include <openssl/rand.h> |
| |
| /* seed1 through seed5 are concatenated */ |
| static int tls1_PRF(SSL *s, |
| const void *seed1, int seed1_len, |
| const void *seed2, int seed2_len, |
| const void *seed3, int seed3_len, |
| const void *seed4, int seed4_len, |
| const void *seed5, int seed5_len, |
| const unsigned char *sec, int slen, |
| unsigned char *out, int olen) |
| { |
| const EVP_MD *md = ssl_prf_md(s); |
| EVP_PKEY_CTX *pctx = NULL; |
| |
| int ret = 0; |
| size_t outlen = olen; |
| |
| if (md == NULL) { |
| /* Should never happen */ |
| SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR); |
| return 0; |
| } |
| pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL); |
| if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0 |
| || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0 |
| || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, slen) <= 0) |
| goto err; |
| |
| if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, seed1_len) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, seed2_len) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, seed3_len) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, seed4_len) <= 0) |
| goto err; |
| if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, seed5_len) <= 0) |
| goto err; |
| |
| if (EVP_PKEY_derive(pctx, out, &outlen) <= 0) |
| goto err; |
| ret = 1; |
| |
| err: |
| EVP_PKEY_CTX_free(pctx); |
| return ret; |
| } |
| |
| static int tls1_generate_key_block(SSL *s, unsigned char *km, int num) |
| { |
| int ret; |
| ret = tls1_PRF(s, |
| TLS_MD_KEY_EXPANSION_CONST, |
| TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random, |
| SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE, |
| NULL, 0, NULL, 0, s->session->master_key, |
| s->session->master_key_length, km, num); |
| |
| return ret; |
| } |
| |
| int tls1_change_cipher_state(SSL *s, int which) |
| { |
| unsigned char *p, *mac_secret; |
| unsigned char tmp1[EVP_MAX_KEY_LENGTH]; |
| unsigned char tmp2[EVP_MAX_KEY_LENGTH]; |
| unsigned char iv1[EVP_MAX_IV_LENGTH * 2]; |
| unsigned char iv2[EVP_MAX_IV_LENGTH * 2]; |
| unsigned char *ms, *key, *iv; |
| EVP_CIPHER_CTX *dd; |
| const EVP_CIPHER *c; |
| #ifndef OPENSSL_NO_COMP |
| const SSL_COMP *comp; |
| #endif |
| const EVP_MD *m; |
| int mac_type; |
| int *mac_secret_size; |
| EVP_MD_CTX *mac_ctx; |
| EVP_PKEY *mac_key; |
| int n, i, j, k, cl; |
| int reuse_dd = 0; |
| |
| c = s->s3->tmp.new_sym_enc; |
| m = s->s3->tmp.new_hash; |
| mac_type = s->s3->tmp.new_mac_pkey_type; |
| #ifndef OPENSSL_NO_COMP |
| comp = s->s3->tmp.new_compression; |
| #endif |
| |
| if (which & SSL3_CC_READ) { |
| if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
| s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; |
| else |
| s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; |
| |
| if (s->enc_read_ctx != NULL) |
| reuse_dd = 1; |
| else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) |
| goto err; |
| else |
| /* |
| * make sure it's intialized in case we exit later with an error |
| */ |
| EVP_CIPHER_CTX_reset(s->enc_read_ctx); |
| dd = s->enc_read_ctx; |
| mac_ctx = ssl_replace_hash(&s->read_hash, NULL); |
| if (mac_ctx == NULL) |
| goto err; |
| #ifndef OPENSSL_NO_COMP |
| COMP_CTX_free(s->expand); |
| s->expand = NULL; |
| if (comp != NULL) { |
| s->expand = COMP_CTX_new(comp->method); |
| if (s->expand == NULL) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, |
| SSL_R_COMPRESSION_LIBRARY_ERROR); |
| goto err2; |
| } |
| } |
| #endif |
| /* |
| * this is done by dtls1_reset_seq_numbers for DTLS |
| */ |
| if (!SSL_IS_DTLS(s)) |
| RECORD_LAYER_reset_read_sequence(&s->rlayer); |
| mac_secret = &(s->s3->read_mac_secret[0]); |
| mac_secret_size = &(s->s3->read_mac_secret_size); |
| } else { |
| if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
| s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; |
| else |
| s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; |
| if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) |
| reuse_dd = 1; |
| else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) |
| goto err; |
| dd = s->enc_write_ctx; |
| if (SSL_IS_DTLS(s)) { |
| mac_ctx = EVP_MD_CTX_new(); |
| if (mac_ctx == NULL) |
| goto err; |
| s->write_hash = mac_ctx; |
| } else { |
| mac_ctx = ssl_replace_hash(&s->write_hash, NULL); |
| if (mac_ctx == NULL) |
| goto err; |
| } |
| #ifndef OPENSSL_NO_COMP |
| COMP_CTX_free(s->compress); |
| s->compress = NULL; |
| if (comp != NULL) { |
| s->compress = COMP_CTX_new(comp->method); |
| if (s->compress == NULL) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, |
| SSL_R_COMPRESSION_LIBRARY_ERROR); |
| goto err2; |
| } |
| } |
| #endif |
| /* |
| * this is done by dtls1_reset_seq_numbers for DTLS |
| */ |
| if (!SSL_IS_DTLS(s)) |
| RECORD_LAYER_reset_write_sequence(&s->rlayer); |
| mac_secret = &(s->s3->write_mac_secret[0]); |
| mac_secret_size = &(s->s3->write_mac_secret_size); |
| } |
| |
| if (reuse_dd) |
| EVP_CIPHER_CTX_reset(dd); |
| |
| p = s->s3->tmp.key_block; |
| i = *mac_secret_size = s->s3->tmp.new_mac_secret_size; |
| |
| cl = EVP_CIPHER_key_length(c); |
| j = cl; |
| /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
| /* If GCM/CCM mode only part of IV comes from PRF */ |
| if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) |
| k = EVP_GCM_TLS_FIXED_IV_LEN; |
| else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) |
| k = EVP_CCM_TLS_FIXED_IV_LEN; |
| else |
| k = EVP_CIPHER_iv_length(c); |
| if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || |
| (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { |
| ms = &(p[0]); |
| n = i + i; |
| key = &(p[n]); |
| n += j + j; |
| iv = &(p[n]); |
| n += k + k; |
| } else { |
| n = i; |
| ms = &(p[n]); |
| n += i + j; |
| key = &(p[n]); |
| n += j + k; |
| iv = &(p[n]); |
| n += k; |
| } |
| |
| if (n > s->s3->tmp.key_block_length) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| |
| memcpy(mac_secret, ms, i); |
| |
| if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) { |
| mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, |
| mac_secret, *mac_secret_size); |
| if (mac_key == NULL |
| || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) { |
| EVP_PKEY_free(mac_key); |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| EVP_PKEY_free(mac_key); |
| } |
| #ifdef SSL_DEBUG |
| printf("which = %04X\nmac key=", which); |
| { |
| int z; |
| for (z = 0; z < i; z++) |
| printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| #endif |
| |
| if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) { |
| if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE)) |
| || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) { |
| int taglen; |
| if (s->s3->tmp.new_cipher->algorithm_enc & (SSL_AES128CCM8|SSL_AES256CCM8)) |
| taglen = 8; |
| else |
| taglen = 16; |
| if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE)) |
| || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL) |
| || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL) |
| || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, k, iv) |
| || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| } else { |
| if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| } |
| /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ |
| if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size |
| && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY, |
| *mac_secret_size, mac_secret)) { |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
| goto err2; |
| } |
| #ifdef OPENSSL_SSL_TRACE_CRYPTO |
| if (s->msg_callback) { |
| int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0; |
| if (*mac_secret_size) |
| s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC, |
| mac_secret, *mac_secret_size, |
| s, s->msg_callback_arg); |
| if (c->key_len) |
| s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY, |
| key, c->key_len, s, s->msg_callback_arg); |
| if (k) { |
| if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) |
| wh |= TLS1_RT_CRYPTO_FIXED_IV; |
| else |
| wh |= TLS1_RT_CRYPTO_IV; |
| s->msg_callback(2, s->version, wh, iv, k, s, s->msg_callback_arg); |
| } |
| } |
| #endif |
| |
| #ifdef SSL_DEBUG |
| printf("which = %04X\nkey=", which); |
| { |
| int z; |
| for (z = 0; z < EVP_CIPHER_key_length(c); z++) |
| printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| printf("\niv="); |
| { |
| int z; |
| for (z = 0; z < k; z++) |
| printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| printf("\n"); |
| #endif |
| |
| OPENSSL_cleanse(tmp1, sizeof(tmp1)); |
| OPENSSL_cleanse(tmp2, sizeof(tmp1)); |
| OPENSSL_cleanse(iv1, sizeof(iv1)); |
| OPENSSL_cleanse(iv2, sizeof(iv2)); |
| return (1); |
| err: |
| SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE); |
| err2: |
| OPENSSL_cleanse(tmp1, sizeof(tmp1)); |
| OPENSSL_cleanse(tmp2, sizeof(tmp1)); |
| OPENSSL_cleanse(iv1, sizeof(iv1)); |
| OPENSSL_cleanse(iv2, sizeof(iv2)); |
| return (0); |
| } |
| |
| int tls1_setup_key_block(SSL *s) |
| { |
| unsigned char *p; |
| const EVP_CIPHER *c; |
| const EVP_MD *hash; |
| int num; |
| SSL_COMP *comp; |
| int mac_type = NID_undef, mac_secret_size = 0; |
| int ret = 0; |
| |
| if (s->s3->tmp.key_block_length != 0) |
| return (1); |
| |
| if (!ssl_cipher_get_evp |
| (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp, |
| SSL_USE_ETM(s))) { |
| SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE); |
| return (0); |
| } |
| |
| s->s3->tmp.new_sym_enc = c; |
| s->s3->tmp.new_hash = hash; |
| s->s3->tmp.new_mac_pkey_type = mac_type; |
| s->s3->tmp.new_mac_secret_size = mac_secret_size; |
| num = |
| EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c); |
| num *= 2; |
| |
| ssl3_cleanup_key_block(s); |
| |
| if ((p = OPENSSL_malloc(num)) == NULL) { |
| SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| s->s3->tmp.key_block_length = num; |
| s->s3->tmp.key_block = p; |
| |
| #ifdef SSL_DEBUG |
| printf("client random\n"); |
| { |
| int z; |
| for (z = 0; z < SSL3_RANDOM_SIZE; z++) |
| printf("%02X%c", s->s3->client_random[z], |
| ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| printf("server random\n"); |
| { |
| int z; |
| for (z = 0; z < SSL3_RANDOM_SIZE; z++) |
| printf("%02X%c", s->s3->server_random[z], |
| ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| printf("master key\n"); |
| { |
| int z; |
| for (z = 0; z < s->session->master_key_length; z++) |
| printf("%02X%c", s->session->master_key[z], |
| ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| #endif |
| if (!tls1_generate_key_block(s, p, num)) |
| goto err; |
| #ifdef SSL_DEBUG |
| printf("\nkey block\n"); |
| { |
| int z; |
| for (z = 0; z < num; z++) |
| printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n'); |
| } |
| #endif |
| |
| if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) |
| && s->method->version <= TLS1_VERSION) { |
| /* |
| * enable vulnerability countermeasure for CBC ciphers with known-IV |
| * problem (http://www.openssl.org/~bodo/tls-cbc.txt) |
| */ |
| s->s3->need_empty_fragments = 1; |
| |
| if (s->session->cipher != NULL) { |
| if (s->session->cipher->algorithm_enc == SSL_eNULL) |
| s->s3->need_empty_fragments = 0; |
| |
| #ifndef OPENSSL_NO_RC4 |
| if (s->session->cipher->algorithm_enc == SSL_RC4) |
| s->s3->need_empty_fragments = 0; |
| #endif |
| } |
| } |
| |
| ret = 1; |
| err: |
| return (ret); |
| } |
| |
| int tls1_final_finish_mac(SSL *s, const char *str, int slen, |
| unsigned char *out) |
| { |
| int hashlen; |
| unsigned char hash[EVP_MAX_MD_SIZE]; |
| |
| if (!ssl3_digest_cached_records(s, 0)) |
| return 0; |
| |
| hashlen = ssl_handshake_hash(s, hash, sizeof(hash)); |
| |
| if (hashlen == 0) |
| return 0; |
| |
| if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0, |
| s->session->master_key, s->session->master_key_length, |
| out, TLS1_FINISH_MAC_LENGTH)) |
| return 0; |
| OPENSSL_cleanse(hash, hashlen); |
| return TLS1_FINISH_MAC_LENGTH; |
| } |
| |
| int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
| int len) |
| { |
| if (s->session->flags & SSL_SESS_FLAG_EXTMS) { |
| unsigned char hash[EVP_MAX_MD_SIZE * 2]; |
| int hashlen; |
| /* Digest cached records keeping record buffer (if present): |
| * this wont affect client auth because we're freezing the buffer |
| * at the same point (after client key exchange and before certificate |
| * verify) |
| */ |
| if (!ssl3_digest_cached_records(s, 1)) |
| return -1; |
| hashlen = ssl_handshake_hash(s, hash, sizeof(hash)); |
| #ifdef SSL_DEBUG |
| fprintf(stderr, "Handshake hashes:\n"); |
| BIO_dump_fp(stderr, (char *)hash, hashlen); |
| #endif |
| tls1_PRF(s, |
| TLS_MD_EXTENDED_MASTER_SECRET_CONST, |
| TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE, |
| hash, hashlen, |
| NULL, 0, |
| NULL, 0, |
| NULL, 0, p, len, s->session->master_key, |
| SSL3_MASTER_SECRET_SIZE); |
| OPENSSL_cleanse(hash, hashlen); |
| } else { |
| tls1_PRF(s, |
| TLS_MD_MASTER_SECRET_CONST, |
| TLS_MD_MASTER_SECRET_CONST_SIZE, |
| s->s3->client_random, SSL3_RANDOM_SIZE, |
| NULL, 0, |
| s->s3->server_random, SSL3_RANDOM_SIZE, |
| NULL, 0, p, len, s->session->master_key, |
| SSL3_MASTER_SECRET_SIZE); |
| } |
| #ifdef SSL_DEBUG |
| fprintf(stderr, "Premaster Secret:\n"); |
| BIO_dump_fp(stderr, (char *)p, len); |
| fprintf(stderr, "Client Random:\n"); |
| BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); |
| fprintf(stderr, "Server Random:\n"); |
| BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); |
| fprintf(stderr, "Master Secret:\n"); |
| BIO_dump_fp(stderr, (char *)s->session->master_key, |
| SSL3_MASTER_SECRET_SIZE); |
| #endif |
| |
| #ifdef OPENSSL_SSL_TRACE_CRYPTO |
| if (s->msg_callback) { |
| s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER, |
| p, len, s, s->msg_callback_arg); |
| s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM, |
| s->s3->client_random, SSL3_RANDOM_SIZE, |
| s, s->msg_callback_arg); |
| s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM, |
| s->s3->server_random, SSL3_RANDOM_SIZE, |
| s, s->msg_callback_arg); |
| s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER, |
| s->session->master_key, |
| SSL3_MASTER_SECRET_SIZE, s, s->msg_callback_arg); |
| } |
| #endif |
| |
| return (SSL3_MASTER_SECRET_SIZE); |
| } |
| |
| int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, |
| const char *label, size_t llen, |
| const unsigned char *context, |
| size_t contextlen, int use_context) |
| { |
| unsigned char *val = NULL; |
| size_t vallen = 0, currentvalpos; |
| int rv; |
| |
| /* |
| * construct PRF arguments we construct the PRF argument ourself rather |
| * than passing separate values into the TLS PRF to ensure that the |
| * concatenation of values does not create a prohibited label. |
| */ |
| vallen = llen + SSL3_RANDOM_SIZE * 2; |
| if (use_context) { |
| vallen += 2 + contextlen; |
| } |
| |
| val = OPENSSL_malloc(vallen); |
| if (val == NULL) |
| goto err2; |
| currentvalpos = 0; |
| memcpy(val + currentvalpos, (unsigned char *)label, llen); |
| currentvalpos += llen; |
| memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); |
| currentvalpos += SSL3_RANDOM_SIZE; |
| memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); |
| currentvalpos += SSL3_RANDOM_SIZE; |
| |
| if (use_context) { |
| val[currentvalpos] = (contextlen >> 8) & 0xff; |
| currentvalpos++; |
| val[currentvalpos] = contextlen & 0xff; |
| currentvalpos++; |
| if ((contextlen > 0) || (context != NULL)) { |
| memcpy(val + currentvalpos, context, contextlen); |
| } |
| } |
| |
| /* |
| * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited |
| * label len) = 15, so size of val > max(prohibited label len) = 15 and |
| * the comparisons won't have buffer overflow |
| */ |
| if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, |
| TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) |
| goto err1; |
| if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, |
| TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) |
| goto err1; |
| if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, |
| TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) |
| goto err1; |
| if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST, |
| TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0) |
| goto err1; |
| if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, |
| TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) |
| goto err1; |
| |
| rv = tls1_PRF(s, |
| val, vallen, |
| NULL, 0, |
| NULL, 0, |
| NULL, 0, |
| NULL, 0, |
| s->session->master_key, s->session->master_key_length, |
| out, olen); |
| |
| goto ret; |
| err1: |
| SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, |
| SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); |
| rv = 0; |
| goto ret; |
| err2: |
| SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); |
| rv = 0; |
| ret: |
| OPENSSL_clear_free(val, vallen); |
| return (rv); |
| } |
| |
| int tls1_alert_code(int code) |
| { |
| switch (code) { |
| case SSL_AD_CLOSE_NOTIFY: |
| return (SSL3_AD_CLOSE_NOTIFY); |
| case SSL_AD_UNEXPECTED_MESSAGE: |
| return (SSL3_AD_UNEXPECTED_MESSAGE); |
| case SSL_AD_BAD_RECORD_MAC: |
| return (SSL3_AD_BAD_RECORD_MAC); |
| case SSL_AD_DECRYPTION_FAILED: |
| return (TLS1_AD_DECRYPTION_FAILED); |
| case SSL_AD_RECORD_OVERFLOW: |
| return (TLS1_AD_RECORD_OVERFLOW); |
| case SSL_AD_DECOMPRESSION_FAILURE: |
| return (SSL3_AD_DECOMPRESSION_FAILURE); |
| case SSL_AD_HANDSHAKE_FAILURE: |
| return (SSL3_AD_HANDSHAKE_FAILURE); |
| case SSL_AD_NO_CERTIFICATE: |
| return (-1); |
| case SSL_AD_BAD_CERTIFICATE: |
| return (SSL3_AD_BAD_CERTIFICATE); |
| case SSL_AD_UNSUPPORTED_CERTIFICATE: |
| return (SSL3_AD_UNSUPPORTED_CERTIFICATE); |
| case SSL_AD_CERTIFICATE_REVOKED: |
| return (SSL3_AD_CERTIFICATE_REVOKED); |
| case SSL_AD_CERTIFICATE_EXPIRED: |
| return (SSL3_AD_CERTIFICATE_EXPIRED); |
| case SSL_AD_CERTIFICATE_UNKNOWN: |
| return (SSL3_AD_CERTIFICATE_UNKNOWN); |
| case SSL_AD_ILLEGAL_PARAMETER: |
| return (SSL3_AD_ILLEGAL_PARAMETER); |
| case SSL_AD_UNKNOWN_CA: |
| return (TLS1_AD_UNKNOWN_CA); |
| case SSL_AD_ACCESS_DENIED: |
| return (TLS1_AD_ACCESS_DENIED); |
| case SSL_AD_DECODE_ERROR: |
| return (TLS1_AD_DECODE_ERROR); |
| case SSL_AD_DECRYPT_ERROR: |
| return (TLS1_AD_DECRYPT_ERROR); |
| case SSL_AD_EXPORT_RESTRICTION: |
| return (TLS1_AD_EXPORT_RESTRICTION); |
| case SSL_AD_PROTOCOL_VERSION: |
| return (TLS1_AD_PROTOCOL_VERSION); |
| case SSL_AD_INSUFFICIENT_SECURITY: |
| return (TLS1_AD_INSUFFICIENT_SECURITY); |
| case SSL_AD_INTERNAL_ERROR: |
| return (TLS1_AD_INTERNAL_ERROR); |
| case SSL_AD_USER_CANCELLED: |
| return (TLS1_AD_USER_CANCELLED); |
| case SSL_AD_NO_RENEGOTIATION: |
| return (TLS1_AD_NO_RENEGOTIATION); |
| case SSL_AD_UNSUPPORTED_EXTENSION: |
| return (TLS1_AD_UNSUPPORTED_EXTENSION); |
| case SSL_AD_CERTIFICATE_UNOBTAINABLE: |
| return (TLS1_AD_CERTIFICATE_UNOBTAINABLE); |
| case SSL_AD_UNRECOGNIZED_NAME: |
| return (TLS1_AD_UNRECOGNIZED_NAME); |
| case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: |
| return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); |
| case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: |
| return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); |
| case SSL_AD_UNKNOWN_PSK_IDENTITY: |
| return (TLS1_AD_UNKNOWN_PSK_IDENTITY); |
| case SSL_AD_INAPPROPRIATE_FALLBACK: |
| return (TLS1_AD_INAPPROPRIATE_FALLBACK); |
| case SSL_AD_NO_APPLICATION_PROTOCOL: |
| return (TLS1_AD_NO_APPLICATION_PROTOCOL); |
| default: |
| return (-1); |
| } |
| } |
