diff options
Diffstat (limited to 'thirdparty/openssl/ssl/s3_enc.c')
| -rw-r--r-- | thirdparty/openssl/ssl/s3_enc.c | 1000 |
1 files changed, 0 insertions, 1000 deletions
diff --git a/thirdparty/openssl/ssl/s3_enc.c b/thirdparty/openssl/ssl/s3_enc.c deleted file mode 100644 index 1eee9d9b21..0000000000 --- a/thirdparty/openssl/ssl/s3_enc.c +++ /dev/null @@ -1,1000 +0,0 @@ -/* ssl/s3_enc.c */ -/* 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/evp.h> -#include <openssl/md5.h> - -static unsigned char ssl3_pad_1[48] = { - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, - 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36 -}; - -static unsigned char ssl3_pad_2[48] = { - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, - 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c -}; - -static int ssl3_handshake_mac(SSL *s, int md_nid, - const char *sender, int len, unsigned char *p); -static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) -{ - EVP_MD_CTX m5; - EVP_MD_CTX s1; - unsigned char buf[16], smd[SHA_DIGEST_LENGTH]; - unsigned char c = 'A'; - unsigned int i, j, k; - -#ifdef CHARSET_EBCDIC - c = os_toascii[c]; /* 'A' in ASCII */ -#endif - k = 0; - EVP_MD_CTX_init(&m5); - EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); - EVP_MD_CTX_init(&s1); - for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) { - k++; - if (k > sizeof(buf)) - /* bug: 'buf' is too small for this ciphersuite */ - goto err; - - for (j = 0; j < k; j++) - buf[j] = c; - c++; - if (!EVP_DigestInit_ex(&s1, EVP_sha1(), NULL) || - !EVP_DigestUpdate(&s1, buf, k) || - !EVP_DigestUpdate(&s1, s->session->master_key, - s->session->master_key_length) || - !EVP_DigestUpdate(&s1, s->s3->server_random, SSL3_RANDOM_SIZE) || - !EVP_DigestUpdate(&s1, s->s3->client_random, SSL3_RANDOM_SIZE) || - !EVP_DigestFinal_ex(&s1, smd, NULL)) - goto err2; - - if (!EVP_DigestInit_ex(&m5, EVP_md5(), NULL) || - !EVP_DigestUpdate(&m5, s->session->master_key, - s->session->master_key_length) || - !EVP_DigestUpdate(&m5, smd, SHA_DIGEST_LENGTH)) - goto err2; - if ((int)(i + MD5_DIGEST_LENGTH) > num) { - if (!EVP_DigestFinal_ex(&m5, smd, NULL)) - goto err2; - memcpy(km, smd, (num - i)); - } else - if (!EVP_DigestFinal_ex(&m5, km, NULL)) - goto err2; - - km += MD5_DIGEST_LENGTH; - } - OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH); - EVP_MD_CTX_cleanup(&m5); - EVP_MD_CTX_cleanup(&s1); - return 1; - err: - SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR); - err2: - EVP_MD_CTX_cleanup(&m5); - EVP_MD_CTX_cleanup(&s1); - return 0; -} - -int ssl3_change_cipher_state(SSL *s, int which) -{ - unsigned char *p, *mac_secret; - unsigned char exp_key[EVP_MAX_KEY_LENGTH]; - unsigned char exp_iv[EVP_MAX_IV_LENGTH]; - unsigned char *ms, *key, *iv, *er1, *er2; - EVP_CIPHER_CTX *dd; - const EVP_CIPHER *c; -#ifndef OPENSSL_NO_COMP - COMP_METHOD *comp; -#endif - const EVP_MD *m; - EVP_MD_CTX md; - int is_exp, n, i, j, k, cl; - int reuse_dd = 0; - - is_exp = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); - c = s->s3->tmp.new_sym_enc; - m = s->s3->tmp.new_hash; - /* m == NULL will lead to a crash later */ - OPENSSL_assert(m); -#ifndef OPENSSL_NO_COMP - if (s->s3->tmp.new_compression == NULL) - comp = NULL; - else - comp = s->s3->tmp.new_compression->method; -#endif - - if (which & SSL3_CC_READ) { - if (s->enc_read_ctx != NULL) - reuse_dd = 1; - else if ((s->enc_read_ctx = - OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) - goto err; - else - /* - * make sure it's intialized in case we exit later with an error - */ - EVP_CIPHER_CTX_init(s->enc_read_ctx); - dd = s->enc_read_ctx; - - if (ssl_replace_hash(&s->read_hash, m) == NULL) { - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); - goto err2; - } -#ifndef OPENSSL_NO_COMP - /* COMPRESS */ - if (s->expand != NULL) { - COMP_CTX_free(s->expand); - s->expand = NULL; - } - if (comp != NULL) { - s->expand = COMP_CTX_new(comp); - if (s->expand == NULL) { - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, - SSL_R_COMPRESSION_LIBRARY_ERROR); - goto err2; - } - if (s->s3->rrec.comp == NULL) - s->s3->rrec.comp = (unsigned char *) - OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH); - if (s->s3->rrec.comp == NULL) - goto err; - } -#endif - memset(&(s->s3->read_sequence[0]), 0, 8); - mac_secret = &(s->s3->read_mac_secret[0]); - } else { - if (s->enc_write_ctx != NULL) - reuse_dd = 1; - else if ((s->enc_write_ctx = - OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) - goto err; - else - /* - * make sure it's intialized in case we exit later with an error - */ - EVP_CIPHER_CTX_init(s->enc_write_ctx); - dd = s->enc_write_ctx; - if (ssl_replace_hash(&s->write_hash, m) == NULL) { - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); - goto err2; - } -#ifndef OPENSSL_NO_COMP - /* COMPRESS */ - if (s->compress != NULL) { - COMP_CTX_free(s->compress); - s->compress = NULL; - } - if (comp != NULL) { - s->compress = COMP_CTX_new(comp); - if (s->compress == NULL) { - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, - SSL_R_COMPRESSION_LIBRARY_ERROR); - goto err2; - } - } -#endif - memset(&(s->s3->write_sequence[0]), 0, 8); - mac_secret = &(s->s3->write_mac_secret[0]); - } - - if (reuse_dd) - EVP_CIPHER_CTX_cleanup(dd); - - p = s->s3->tmp.key_block; - i = EVP_MD_size(m); - if (i < 0) - goto err2; - cl = EVP_CIPHER_key_length(c); - j = is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? - cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; - /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */ - 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; - er1 = &(s->s3->client_random[0]); - er2 = &(s->s3->server_random[0]); - } else { - n = i; - ms = &(p[n]); - n += i + j; - key = &(p[n]); - n += j + k; - iv = &(p[n]); - n += k; - er1 = &(s->s3->server_random[0]); - er2 = &(s->s3->client_random[0]); - } - - if (n > s->s3->tmp.key_block_length) { - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); - goto err2; - } - - EVP_MD_CTX_init(&md); - memcpy(mac_secret, ms, i); - if (is_exp) { - /* - * In here I set both the read and write key/iv to the same value - * since only the correct one will be used :-). - */ - if (!EVP_DigestInit_ex(&md, EVP_md5(), NULL) || - !EVP_DigestUpdate(&md, key, j) || - !EVP_DigestUpdate(&md, er1, SSL3_RANDOM_SIZE) || - !EVP_DigestUpdate(&md, er2, SSL3_RANDOM_SIZE) || - !EVP_DigestFinal_ex(&md, &(exp_key[0]), NULL)) { - EVP_MD_CTX_cleanup(&md); - goto err2; - } - key = &(exp_key[0]); - - if (k > 0) { - if (!EVP_DigestInit_ex(&md, EVP_md5(), NULL) || - !EVP_DigestUpdate(&md, er1, SSL3_RANDOM_SIZE) || - !EVP_DigestUpdate(&md, er2, SSL3_RANDOM_SIZE) || - !EVP_DigestFinal_ex(&md, &(exp_iv[0]), NULL)) { - EVP_MD_CTX_cleanup(&md); - goto err2; - } - iv = &(exp_iv[0]); - } - } - EVP_MD_CTX_cleanup(&md); - - s->session->key_arg_length = 0; - - if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) - goto err2; - -#ifdef OPENSSL_SSL_TRACE_CRYPTO - if (s->msg_callback) { - - int wh = which & SSL3_CC_WRITE ? - TLS1_RT_CRYPTO_WRITE : TLS1_RT_CRYPTO_READ; - s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC, - mac_secret, EVP_MD_size(m), 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) { - s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_IV, - iv, k, s, s->msg_callback_arg); - } - } -#endif - - OPENSSL_cleanse(&(exp_key[0]), sizeof(exp_key)); - OPENSSL_cleanse(&(exp_iv[0]), sizeof(exp_iv)); - return (1); - err: - SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE); - err2: - return (0); -} - -int ssl3_setup_key_block(SSL *s) -{ - unsigned char *p; - const EVP_CIPHER *c; - const EVP_MD *hash; - int num; - int ret = 0; - SSL_COMP *comp; - - if (s->s3->tmp.key_block_length != 0) - return (1); - - if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp)) { - SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE); - return (0); - } - - s->s3->tmp.new_sym_enc = c; - s->s3->tmp.new_hash = hash; -#ifdef OPENSSL_NO_COMP - s->s3->tmp.new_compression = NULL; -#else - s->s3->tmp.new_compression = comp; -#endif - - num = EVP_MD_size(hash); - if (num < 0) - return 0; - - num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c); - num *= 2; - - ssl3_cleanup_key_block(s); - - if ((p = OPENSSL_malloc(num)) == NULL) - goto err; - - s->s3->tmp.key_block_length = num; - s->s3->tmp.key_block = p; - - ret = ssl3_generate_key_block(s, p, num); - - if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) { - /* - * 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 - } - } - - return ret; - - err: - SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); - return (0); -} - -void ssl3_cleanup_key_block(SSL *s) -{ - if (s->s3->tmp.key_block != NULL) { - OPENSSL_cleanse(s->s3->tmp.key_block, s->s3->tmp.key_block_length); - OPENSSL_free(s->s3->tmp.key_block); - s->s3->tmp.key_block = NULL; - } - s->s3->tmp.key_block_length = 0; -} - -/*- - * ssl3_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively. - * - * Returns: - * 0: (in non-constant time) if the record is publically invalid (i.e. too - * short etc). - * 1: if the record's padding is valid / the encryption was successful. - * -1: if the record's padding is invalid or, if sending, an internal error - * occured. - */ -int ssl3_enc(SSL *s, int send) -{ - SSL3_RECORD *rec; - EVP_CIPHER_CTX *ds; - unsigned long l; - int bs, i, mac_size = 0; - const EVP_CIPHER *enc; - - if (send) { - ds = s->enc_write_ctx; - rec = &(s->s3->wrec); - if (s->enc_write_ctx == NULL) - enc = NULL; - else - enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx); - } else { - ds = s->enc_read_ctx; - rec = &(s->s3->rrec); - if (s->enc_read_ctx == NULL) - enc = NULL; - else - enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx); - } - - if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) { - memmove(rec->data, rec->input, rec->length); - rec->input = rec->data; - } else { - l = rec->length; - bs = EVP_CIPHER_block_size(ds->cipher); - - /* COMPRESS */ - - if ((bs != 1) && send) { - i = bs - ((int)l % bs); - - /* we need to add 'i-1' padding bytes */ - l += i; - /* - * the last of these zero bytes will be overwritten with the - * padding length. - */ - memset(&rec->input[rec->length], 0, i); - rec->length += i; - rec->input[l - 1] = (i - 1); - } - - if (!send) { - if (l == 0 || l % bs != 0) - return 0; - /* otherwise, rec->length >= bs */ - } - - if (EVP_Cipher(ds, rec->data, rec->input, l) < 1) - return -1; - - if (EVP_MD_CTX_md(s->read_hash) != NULL) - mac_size = EVP_MD_CTX_size(s->read_hash); - if ((bs != 1) && !send) - return ssl3_cbc_remove_padding(s, rec, bs, mac_size); - } - return 1; -} - -int ssl3_init_finished_mac(SSL *s) -{ - if (s->s3->handshake_buffer) - BIO_free(s->s3->handshake_buffer); - if (s->s3->handshake_dgst) - ssl3_free_digest_list(s); - s->s3->handshake_buffer = BIO_new(BIO_s_mem()); - if (s->s3->handshake_buffer == NULL) - return 0; - (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE); - return 1; -} - -void ssl3_free_digest_list(SSL *s) -{ - int i; - if (!s->s3->handshake_dgst) - return; - for (i = 0; i < SSL_MAX_DIGEST; i++) { - if (s->s3->handshake_dgst[i]) - EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]); - } - OPENSSL_free(s->s3->handshake_dgst); - s->s3->handshake_dgst = NULL; -} - -void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) -{ - if (s->s3->handshake_buffer - && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) { - BIO_write(s->s3->handshake_buffer, (void *)buf, len); - } else { - int i; - for (i = 0; i < SSL_MAX_DIGEST; i++) { - if (s->s3->handshake_dgst[i] != NULL) - EVP_DigestUpdate(s->s3->handshake_dgst[i], buf, len); - } - } -} - -int ssl3_digest_cached_records(SSL *s) -{ - int i; - long mask; - const EVP_MD *md; - long hdatalen; - void *hdata; - - /* Allocate handshake_dgst array */ - ssl3_free_digest_list(s); - s->s3->handshake_dgst = - OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *)); - if (s->s3->handshake_dgst == NULL) { - SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE); - return 0; - } - memset(s->s3->handshake_dgst, 0, SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *)); - hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); - if (hdatalen <= 0) { - SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH); - return 0; - } - - /* Loop through bitso of algorithm2 field and create MD_CTX-es */ - for (i = 0; ssl_get_handshake_digest(i, &mask, &md); i++) { - if ((mask & ssl_get_algorithm2(s)) && md) { - s->s3->handshake_dgst[i] = EVP_MD_CTX_create(); - if (s->s3->handshake_dgst[i] == NULL) { - SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE); - return 0; - } -#ifdef OPENSSL_FIPS - if (EVP_MD_nid(md) == NID_md5) { - EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i], - EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); - } -#endif - if (!EVP_DigestInit_ex(s->s3->handshake_dgst[i], md, NULL) - || !EVP_DigestUpdate(s->s3->handshake_dgst[i], hdata, - hdatalen)) { - SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR); - return 0; - } - } else { - s->s3->handshake_dgst[i] = NULL; - } - } - if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) { - /* Free handshake_buffer BIO */ - BIO_free(s->s3->handshake_buffer); - s->s3->handshake_buffer = NULL; - } - - return 1; -} - -int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p) -{ - return (ssl3_handshake_mac(s, md_nid, NULL, 0, p)); -} - -int ssl3_final_finish_mac(SSL *s, - const char *sender, int len, unsigned char *p) -{ - int ret, sha1len; - ret = ssl3_handshake_mac(s, NID_md5, sender, len, p); - if (ret == 0) - return 0; - - p += ret; - - sha1len = ssl3_handshake_mac(s, NID_sha1, sender, len, p); - if (sha1len == 0) - return 0; - - ret += sha1len; - return (ret); -} - -static int ssl3_handshake_mac(SSL *s, int md_nid, - const char *sender, int len, unsigned char *p) -{ - unsigned int ret; - int npad, n; - unsigned int i; - unsigned char md_buf[EVP_MAX_MD_SIZE]; - EVP_MD_CTX ctx, *d = NULL; - - if (s->s3->handshake_buffer) - if (!ssl3_digest_cached_records(s)) - return 0; - - /* - * Search for digest of specified type in the handshake_dgst array - */ - for (i = 0; i < SSL_MAX_DIGEST; i++) { - if (s->s3->handshake_dgst[i] - && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) { - d = s->s3->handshake_dgst[i]; - break; - } - } - if (!d) { - SSLerr(SSL_F_SSL3_HANDSHAKE_MAC, SSL_R_NO_REQUIRED_DIGEST); - return 0; - } - EVP_MD_CTX_init(&ctx); - EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); - EVP_MD_CTX_copy_ex(&ctx, d); - n = EVP_MD_CTX_size(&ctx); - if (n < 0) - return 0; - - npad = (48 / n) * n; - if ((sender != NULL && EVP_DigestUpdate(&ctx, sender, len) <= 0) - || EVP_DigestUpdate(&ctx, s->session->master_key, - s->session->master_key_length) <= 0 - || EVP_DigestUpdate(&ctx, ssl3_pad_1, npad) <= 0 - || EVP_DigestFinal_ex(&ctx, md_buf, &i) <= 0 - - || EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL) <= 0 - || EVP_DigestUpdate(&ctx, s->session->master_key, - s->session->master_key_length) <= 0 - || EVP_DigestUpdate(&ctx, ssl3_pad_2, npad) <= 0 - || EVP_DigestUpdate(&ctx, md_buf, i) <= 0 - || EVP_DigestFinal_ex(&ctx, p, &ret) <= 0) { - SSLerr(SSL_F_SSL3_HANDSHAKE_MAC, ERR_R_INTERNAL_ERROR); - ret = 0; - } - - EVP_MD_CTX_cleanup(&ctx); - - return ((int)ret); -} - -int n_ssl3_mac(SSL *ssl, unsigned char *md, int send) -{ - SSL3_RECORD *rec; - unsigned char *mac_sec, *seq; - EVP_MD_CTX md_ctx; - const EVP_MD_CTX *hash; - unsigned char *p, rec_char; - size_t md_size, orig_len; - int npad; - int t; - - if (send) { - rec = &(ssl->s3->wrec); - mac_sec = &(ssl->s3->write_mac_secret[0]); - seq = &(ssl->s3->write_sequence[0]); - hash = ssl->write_hash; - } else { - rec = &(ssl->s3->rrec); - mac_sec = &(ssl->s3->read_mac_secret[0]); - seq = &(ssl->s3->read_sequence[0]); - hash = ssl->read_hash; - } - - t = EVP_MD_CTX_size(hash); - if (t < 0) - return -1; - md_size = t; - npad = (48 / md_size) * md_size; - - /* - * kludge: ssl3_cbc_remove_padding passes padding length in rec->type - */ - orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8); - rec->type &= 0xff; - - if (!send && - EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE && - ssl3_cbc_record_digest_supported(hash)) { - /* - * This is a CBC-encrypted record. We must avoid leaking any - * timing-side channel information about how many blocks of data we - * are hashing because that gives an attacker a timing-oracle. - */ - - /*- - * npad is, at most, 48 bytes and that's with MD5: - * 16 + 48 + 8 (sequence bytes) + 1 + 2 = 75. - * - * With SHA-1 (the largest hash speced for SSLv3) the hash size - * goes up 4, but npad goes down by 8, resulting in a smaller - * total size. - */ - unsigned char header[75]; - unsigned j = 0; - memcpy(header + j, mac_sec, md_size); - j += md_size; - memcpy(header + j, ssl3_pad_1, npad); - j += npad; - memcpy(header + j, seq, 8); - j += 8; - header[j++] = rec->type; - header[j++] = rec->length >> 8; - header[j++] = rec->length & 0xff; - - /* Final param == is SSLv3 */ - if (ssl3_cbc_digest_record(hash, - md, &md_size, - header, rec->input, - rec->length + md_size, orig_len, - mac_sec, md_size, 1) <= 0) - return -1; - } else { - unsigned int md_size_u; - /* Chop the digest off the end :-) */ - EVP_MD_CTX_init(&md_ctx); - - rec_char = rec->type; - p = md; - s2n(rec->length, p); - if (EVP_MD_CTX_copy_ex(&md_ctx, hash) <= 0 - || EVP_DigestUpdate(&md_ctx, mac_sec, md_size) <= 0 - || EVP_DigestUpdate(&md_ctx, ssl3_pad_1, npad) <= 0 - || EVP_DigestUpdate(&md_ctx, seq, 8) <= 0 - || EVP_DigestUpdate(&md_ctx, &rec_char, 1) <= 0 - || EVP_DigestUpdate(&md_ctx, md, 2) <= 0 - || EVP_DigestUpdate(&md_ctx, rec->input, rec->length) <= 0 - || EVP_DigestFinal_ex(&md_ctx, md, NULL) <= 0 - || EVP_MD_CTX_copy_ex(&md_ctx, hash) <= 0 - || EVP_DigestUpdate(&md_ctx, mac_sec, md_size) <= 0 - || EVP_DigestUpdate(&md_ctx, ssl3_pad_2, npad) <= 0 - || EVP_DigestUpdate(&md_ctx, md, md_size) <= 0 - || EVP_DigestFinal_ex(&md_ctx, md, &md_size_u) <= 0) { - EVP_MD_CTX_cleanup(&md_ctx); - return -1; - } - md_size = md_size_u; - - EVP_MD_CTX_cleanup(&md_ctx); - } - - ssl3_record_sequence_update(seq); - return (md_size); -} - -void ssl3_record_sequence_update(unsigned char *seq) -{ - int i; - - for (i = 7; i >= 0; i--) { - ++seq[i]; - if (seq[i] != 0) - break; - } -} - -int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, - int len) -{ - static const unsigned char *salt[3] = { -#ifndef CHARSET_EBCDIC - (const unsigned char *)"A", - (const unsigned char *)"BB", - (const unsigned char *)"CCC", -#else - (const unsigned char *)"\x41", - (const unsigned char *)"\x42\x42", - (const unsigned char *)"\x43\x43\x43", -#endif - }; - unsigned char buf[EVP_MAX_MD_SIZE]; - EVP_MD_CTX ctx; - int i, ret = 0; - unsigned int n; -#ifdef OPENSSL_SSL_TRACE_CRYPTO - unsigned char *tmpout = out; -#endif - - EVP_MD_CTX_init(&ctx); - for (i = 0; i < 3; i++) { - if (EVP_DigestInit_ex(&ctx, s->ctx->sha1, NULL) <= 0 - || EVP_DigestUpdate(&ctx, salt[i], - strlen((const char *)salt[i])) <= 0 - || EVP_DigestUpdate(&ctx, p, len) <= 0 - || EVP_DigestUpdate(&ctx, &(s->s3->client_random[0]), - SSL3_RANDOM_SIZE) <= 0 - || EVP_DigestUpdate(&ctx, &(s->s3->server_random[0]), - SSL3_RANDOM_SIZE) <= 0 - || EVP_DigestFinal_ex(&ctx, buf, &n) <= 0 - - || EVP_DigestInit_ex(&ctx, s->ctx->md5, NULL) <= 0 - || EVP_DigestUpdate(&ctx, p, len) <= 0 - || EVP_DigestUpdate(&ctx, buf, n) <= 0 - || EVP_DigestFinal_ex(&ctx, out, &n) <= 0) { - SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR); - ret = 0; - break; - } - out += n; - ret += n; - } - EVP_MD_CTX_cleanup(&ctx); - -#ifdef OPENSSL_SSL_TRACE_CRYPTO - if (ret > 0 && 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, - tmpout, SSL3_MASTER_SECRET_SIZE, - s, s->msg_callback_arg); - } -#endif - OPENSSL_cleanse(buf, sizeof(buf)); - return (ret); -} - -int ssl3_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 (SSL3_AD_BAD_RECORD_MAC); - case SSL_AD_RECORD_OVERFLOW: - return (SSL3_AD_BAD_RECORD_MAC); - 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 (SSL3_AD_NO_CERTIFICATE); - 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 (SSL3_AD_BAD_CERTIFICATE); - case SSL_AD_ACCESS_DENIED: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_DECODE_ERROR: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_DECRYPT_ERROR: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_EXPORT_RESTRICTION: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_PROTOCOL_VERSION: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_INSUFFICIENT_SECURITY: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_INTERNAL_ERROR: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_USER_CANCELLED: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_NO_RENEGOTIATION: - return (-1); /* Don't send it :-) */ - case SSL_AD_UNSUPPORTED_EXTENSION: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_CERTIFICATE_UNOBTAINABLE: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_UNRECOGNIZED_NAME: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: - return (SSL3_AD_HANDSHAKE_FAILURE); - case SSL_AD_UNKNOWN_PSK_IDENTITY: - return (TLS1_AD_UNKNOWN_PSK_IDENTITY); - case SSL_AD_INAPPROPRIATE_FALLBACK: - return (TLS1_AD_INAPPROPRIATE_FALLBACK); - default: - return (-1); - } -} |