/* 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. *g * 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). *g * 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. *g * 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) fromg * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" *g * 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. *g * 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.g * * 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 #include #include #include #include #include #include #include "ssl_locl.h" static const uint8_t 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 const uint8_t 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, uint8_t *p); static int ssl3_generate_key_block(SSL *s, uint8_t *km, int num) { EVP_MD_CTX md5; EVP_MD_CTX sha1; uint8_t buf[16], smd[SHA_DIGEST_LENGTH]; uint8_t c = 'A'; unsigned int i, j, k; k = 0; EVP_MD_CTX_init(&md5); EVP_MD_CTX_init(&sha1); for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) { k++; if (k > sizeof(buf)) { /* bug: 'buf' is too small for this ciphersuite */ OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_R_INTERNAL_ERROR); return 0; } for (j = 0; j < k; j++) { buf[j] = c; } c++; if (!EVP_DigestInit_ex(&sha1, EVP_sha1(), NULL)) { OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_LIB_EVP); return 0; } EVP_DigestUpdate(&sha1, buf, k); EVP_DigestUpdate(&sha1, s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&sha1, s->s3->server_random, SSL3_RANDOM_SIZE); EVP_DigestUpdate(&sha1, s->s3->client_random, SSL3_RANDOM_SIZE); EVP_DigestFinal_ex(&sha1, smd, NULL); if (!EVP_DigestInit_ex(&md5, EVP_md5(), NULL)) { OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_LIB_EVP); return 0; } EVP_DigestUpdate(&md5, s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&md5, smd, SHA_DIGEST_LENGTH); if ((int)(i + MD5_DIGEST_LENGTH) > num) { EVP_DigestFinal_ex(&md5, smd, NULL); memcpy(km, smd, (num - i)); } else { EVP_DigestFinal_ex(&md5, km, NULL); } km += MD5_DIGEST_LENGTH; } OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH); EVP_MD_CTX_cleanup(&md5); EVP_MD_CTX_cleanup(&sha1); return 1; } int ssl3_change_cipher_state(SSL *s, int which) { uint8_t *p, *mac_secret; uint8_t exp_key[EVP_MAX_KEY_LENGTH]; uint8_t exp_iv[EVP_MAX_IV_LENGTH]; uint8_t *ms, *key, *iv; EVP_CIPHER_CTX *dd; const EVP_CIPHER *c; const EVP_MD *m; int n, i, j, k, cl; int reuse_dd = 0; c = s->s3->tmp.new_sym_enc; m = s->s3->tmp.new_hash; /* m == NULL will lead to a crash later */ assert(m); if (which & SSL3_CC_READ) { if (s->enc_read_ctx != NULL) { reuse_dd = 1; } else { s->enc_read_ctx = OPENSSL_malloc(sizeof(EVP_CIPHER_CTX)); if (s->enc_read_ctx == NULL) { goto err; } EVP_CIPHER_CTX_init(s->enc_read_ctx); } dd = s->enc_read_ctx; ssl_replace_hash(&s->read_hash, m); 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 { s->enc_write_ctx = OPENSSL_malloc(sizeof(EVP_CIPHER_CTX)); if (s->enc_write_ctx == NULL) { goto err; } EVP_CIPHER_CTX_init(s->enc_write_ctx); } dd = s->enc_write_ctx; ssl_replace_hash(&s->write_hash, m); 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); cl = EVP_CIPHER_key_length(c); j = cl; 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) { OPENSSL_PUT_ERROR(SSL, ssl3_change_cipher_state, ERR_R_INTERNAL_ERROR); goto err2; } memcpy(mac_secret, ms, i); if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) { goto err2; } OPENSSL_cleanse(&exp_key[0], sizeof(exp_key)); OPENSSL_cleanse(&exp_iv[0], sizeof(exp_iv)); return 1; err: OPENSSL_PUT_ERROR(SSL, ssl3_change_cipher_state, ERR_R_MALLOC_FAILURE); err2: return 0; } int ssl3_setup_key_block(SSL *s) { uint8_t *p; const EVP_CIPHER *c; const EVP_MD *hash; size_t num; int ret = 0; if (s->s3->tmp.key_block_length != 0) { return 1; } if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL)) { OPENSSL_PUT_ERROR(SSL, 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; num = EVP_MD_size(hash); num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c); num *= 2; ssl3_cleanup_key_block(s); p = OPENSSL_malloc(num); if (p == NULL) { goto err; } s->s3->tmp.key_block_length = num; s->s3->tmp.key_block = p; ret = ssl3_generate_key_block(s, p, num); /* enable vulnerability countermeasure for CBC ciphers with known-IV problem * (http://www.openssl.org/~bodo/tls-cbc.txt) */ if ((s->mode & SSL_MODE_CBC_RECORD_SPLITTING) != 0) { s->s3->need_record_splitting = 1; if (s->session->cipher != NULL && s->session->cipher->algorithm_enc == SSL_RC4) { s->s3->need_record_splitting = 0; } } return ret; err: OPENSSL_PUT_ERROR(SSL, 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 = NULL; if (send) { ds = s->enc_write_ctx; rec = &(s->s3->wrec); if (s->enc_write_ctx != NULL) { 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 = 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); 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)) { 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; } 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 uint8_t *buf, int len) { int i; if (s->s3->handshake_buffer) { BIO_write(s->s3->handshake_buffer, (void *)buf, len); return; } 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, enum should_free_handshake_buffer_t should_free_handshake_buffer) { int i; long mask; const EVP_MD *md; const uint8_t *hdata; size_t hdatalen; /* 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) { OPENSSL_PUT_ERROR(SSL, ssl3_digest_cached_records, ERR_R_MALLOC_FAILURE); return 0; } memset(s->s3->handshake_dgst, 0, SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *)); if (!BIO_mem_contents(s->s3->handshake_buffer, &hdata, &hdatalen)) { OPENSSL_PUT_ERROR(SSL, ssl3_digest_cached_records, SSL_R_BAD_HANDSHAKE_LENGTH); return 0; } /* Loop through bits 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) { OPENSSL_PUT_ERROR(SSL, ssl3_digest_cached_records, ERR_LIB_EVP); return 0; } if (!EVP_DigestInit_ex(s->s3->handshake_dgst[i], md, NULL)) { EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]); s->s3->handshake_dgst[i] = NULL; OPENSSL_PUT_ERROR(SSL, ssl3_digest_cached_records, ERR_LIB_EVP); return 0; } EVP_DigestUpdate(s->s3->handshake_dgst[i], hdata, hdatalen); } else { s->s3->handshake_dgst[i] = NULL; } } if (should_free_handshake_buffer == free_handshake_buffer) { /* 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, uint8_t *p) { return ssl3_handshake_mac(s, md_nid, NULL, 0, p); } int ssl3_final_finish_mac(SSL *s, const char *sender, int len, uint8_t *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, uint8_t *p) { unsigned int ret; int npad, n; unsigned int i; uint8_t md_buf[EVP_MAX_MD_SIZE]; EVP_MD_CTX ctx, *d = NULL; if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s, free_handshake_buffer)) { 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) { OPENSSL_PUT_ERROR(SSL, ssl3_handshake_mac, SSL_R_NO_REQUIRED_DIGEST); return 0; } EVP_MD_CTX_init(&ctx); if (!EVP_MD_CTX_copy_ex(&ctx, d)) { EVP_MD_CTX_cleanup(&ctx); OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_LIB_EVP); return 0; } n = EVP_MD_CTX_size(&ctx); if (n < 0) { return 0; } npad = (48 / n) * n; if (sender != NULL) { EVP_DigestUpdate(&ctx, sender, len); } EVP_DigestUpdate(&ctx, s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&ctx, ssl3_pad_1, npad); EVP_DigestFinal_ex(&ctx, md_buf, &i); if (!EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL)) { EVP_MD_CTX_cleanup(&ctx); OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_LIB_EVP); return 0; } EVP_DigestUpdate(&ctx, s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&ctx, ssl3_pad_2, npad); EVP_DigestUpdate(&ctx, md_buf, i); EVP_DigestFinal_ex(&ctx, p, &ret); EVP_MD_CTX_cleanup(&ctx); return ret; } int n_ssl3_mac(SSL *ssl, uint8_t *md, int send) { SSL3_RECORD *rec; uint8_t *mac_sec, *seq; EVP_MD_CTX md_ctx; const EVP_MD_CTX *hash; uint8_t *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 || t > 20) { 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. */ uint8_t 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; if (!ssl3_cbc_digest_record(hash, md, &md_size, header, rec->input, rec->length + md_size, orig_len, mac_sec, md_size, 1 /* is SSLv3 */)) { return -1; } } else { unsigned int md_size_u; /* Chop the digest off the end :-) */ EVP_MD_CTX_init(&md_ctx); if (!EVP_MD_CTX_copy_ex(&md_ctx, hash)) { EVP_MD_CTX_cleanup(&md_ctx); return -1; } EVP_DigestUpdate(&md_ctx, mac_sec, md_size); EVP_DigestUpdate(&md_ctx, ssl3_pad_1, npad); EVP_DigestUpdate(&md_ctx, seq, 8); rec_char = rec->type; EVP_DigestUpdate(&md_ctx, &rec_char, 1); p = md; s2n(rec->length, p); EVP_DigestUpdate(&md_ctx, md, 2); EVP_DigestUpdate(&md_ctx, rec->input, rec->length); EVP_DigestFinal_ex(&md_ctx, md, NULL); if (!EVP_MD_CTX_copy_ex(&md_ctx, hash)) { EVP_MD_CTX_cleanup(&md_ctx); return -1; } EVP_DigestUpdate(&md_ctx, mac_sec, md_size); EVP_DigestUpdate(&md_ctx, ssl3_pad_2, npad); EVP_DigestUpdate(&md_ctx, md, md_size); EVP_DigestFinal_ex(&md_ctx, md, &md_size_u); md_size = md_size_u; EVP_MD_CTX_cleanup(&md_ctx); } ssl3_record_sequence_update(seq); return md_size; } void ssl3_record_sequence_update(uint8_t *seq) { int i; for (i = 7; i >= 0; i--) { ++seq[i]; if (seq[i] != 0) { break; } } } int ssl3_generate_master_secret(SSL *s, uint8_t *out, uint8_t *p, int len) { uint8_t buf[EVP_MAX_MD_SIZE]; EVP_MD_CTX ctx; int i, ret = 0; unsigned int n; EVP_MD_CTX_init(&ctx); for (i = 0; i < 3; i++) { if (!EVP_DigestInit_ex(&ctx, EVP_sha1(), NULL)) { ret = 0; break; } if (i == 0) { EVP_DigestUpdate(&ctx, (const uint8_t*) "A", 1); } else if (i == 1) { EVP_DigestUpdate(&ctx, (const uint8_t*) "BB", 2); } else { EVP_DigestUpdate(&ctx, (const uint8_t*) "CCC", 3); } EVP_DigestUpdate(&ctx, p, len); EVP_DigestUpdate(&ctx, &s->s3->client_random[0], SSL3_RANDOM_SIZE); EVP_DigestUpdate(&ctx, &s->s3->server_random[0], SSL3_RANDOM_SIZE); EVP_DigestFinal_ex(&ctx, buf, &n); if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL)) { ret = 0; break; } EVP_DigestUpdate(&ctx, p, len); EVP_DigestUpdate(&ctx, buf, n); EVP_DigestFinal_ex(&ctx, out, &n); out += n; ret += n; } EVP_MD_CTX_cleanup(&ctx); 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 SSL3_AD_INAPPROPRIATE_FALLBACK; default: return -1; } }