diff options
Diffstat (limited to 'src/ssl/s3_enc.c')
-rw-r--r-- | src/ssl/s3_enc.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/src/ssl/s3_enc.c b/src/ssl/s3_enc.c new file mode 100644 index 0000000..562cb84 --- /dev/null +++ b/src/ssl/s3_enc.c @@ -0,0 +1,527 @@ +/* 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 <stdio.h> +#include <assert.h> + +#include <openssl/err.h> +#include <openssl/evp.h> +#include <openssl/mem.h> +#include <openssl/md5.h> +#include <openssl/obj.h> + +#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); + +int ssl3_prf(SSL *s, uint8_t *out, size_t out_len, const uint8_t *secret, + size_t secret_len, const char *label, size_t label_len, + const uint8_t *seed1, size_t seed1_len, + const uint8_t *seed2, size_t seed2_len) { + EVP_MD_CTX md5; + EVP_MD_CTX sha1; + uint8_t buf[16], smd[SHA_DIGEST_LENGTH]; + uint8_t c = 'A'; + size_t i, j, k; + + k = 0; + EVP_MD_CTX_init(&md5); + EVP_MD_CTX_init(&sha1); + for (i = 0; i < out_len; i += MD5_DIGEST_LENGTH) { + k++; + if (k > sizeof(buf)) { + /* bug: 'buf' is too small for this ciphersuite */ + OPENSSL_PUT_ERROR(SSL, ssl3_prf, 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_prf, ERR_LIB_EVP); + return 0; + } + EVP_DigestUpdate(&sha1, buf, k); + EVP_DigestUpdate(&sha1, secret, secret_len); + /* |label| is ignored for SSLv3. */ + if (seed1_len) { + EVP_DigestUpdate(&sha1, seed1, seed1_len); + } + if (seed2_len) { + EVP_DigestUpdate(&sha1, seed2, seed2_len); + } + EVP_DigestFinal_ex(&sha1, smd, NULL); + + if (!EVP_DigestInit_ex(&md5, EVP_md5(), NULL)) { + OPENSSL_PUT_ERROR(SSL, ssl3_prf, ERR_LIB_EVP); + return 0; + } + EVP_DigestUpdate(&md5, secret, secret_len); + EVP_DigestUpdate(&md5, smd, SHA_DIGEST_LENGTH); + if (i + MD5_DIGEST_LENGTH > out_len) { + EVP_DigestFinal_ex(&md5, smd, NULL); + memcpy(out, smd, out_len - i); + } else { + EVP_DigestFinal_ex(&md5, out, NULL); + } + + out += MD5_DIGEST_LENGTH; + } + + OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH); + EVP_MD_CTX_cleanup(&md5); + EVP_MD_CTX_cleanup(&sha1); + + return 1; +} + +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; +} + +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; +} + +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_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; + } +} |