| /* 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 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_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 */ |
| OPENSSL_PUT_ERROR(SSL, ssl3_generate_key_block, ERR_R_INTERNAL_ERROR); |
| return 0; |
| } |
| |
| for (j=0; j<k; j++) |
| buf[j]=c; |
| c++; |
| 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); |
| |
| 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); |
| if ((int)(i+MD5_DIGEST_LENGTH) > num) |
| { |
| EVP_DigestFinal_ex(&m5,smd,NULL); |
| memcpy(km,smd,(num-i)); |
| } |
| else |
| EVP_DigestFinal_ex(&m5,km,NULL); |
| |
| km+=MD5_DIGEST_LENGTH; |
| } |
| OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH); |
| EVP_MD_CTX_cleanup(&m5); |
| EVP_MD_CTX_cleanup(&s1); |
| return 1; |
| } |
| |
| 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; |
| 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 */ |
| assert(m); |
| |
| 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; |
| |
| 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 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; |
| 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=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) |
| { |
| OPENSSL_PUT_ERROR(SSL, 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 :-). |
| */ |
| 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); |
| key= &(exp_key[0]); |
| |
| if (k > 0) |
| { |
| 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); |
| iv= &(exp_iv[0]); |
| } |
| } |
| |
| s->session->key_arg_length=0; |
| |
| EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); |
| |
| #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)); |
| EVP_MD_CTX_cleanup(&md); |
| 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) |
| { |
| unsigned char *p; |
| const EVP_CIPHER *c; |
| const EVP_MD *hash; |
| size_t 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)) |
| { |
| 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; |
| s->s3->tmp.new_compression=NULL; |
| |
| num=EVP_MD_size(hash); |
| |
| 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: |
| 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; |
| |
| 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 */ |
| } |
| |
| EVP_Cipher(ds,rec->data,rec->input,l); |
| |
| 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); |
| } |
| |
| void 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()); |
| (void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE); |
| } |
| |
| 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; |
| char *hdata; |
| |
| /* Allocate handshake_dgst array */ |
| ssl3_free_digest_list(s); |
| s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *)); |
| 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) |
| { |
| OPENSSL_PUT_ERROR(SSL, 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(); |
| EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL); |
| EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen); |
| } |
| 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; |
| ret=ssl3_handshake_mac(s,NID_md5,sender,len,p); |
| p+=ret; |
| ret+=ssl3_handshake_mac(s,NID_sha1,sender,len,p); |
| 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) { |
| OPENSSL_PUT_ERROR(SSL, ssl3_handshake_mac, SSL_R_NO_REQUIRED_DIGEST); |
| return 0; |
| } |
| EVP_MD_CTX_init(&ctx); |
| 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); |
| 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); |
| |
| EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL); |
| 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((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; |
| |
| ssl3_cbc_digest_record( |
| hash, |
| md, &md_size, |
| header, rec->input, |
| rec->length + md_size, orig_len, |
| mac_sec, md_size, |
| 1 /* is SSLv3 */); |
| } |
| else |
| { |
| unsigned int md_size_u; |
| /* Chop the digest off the end :-) */ |
| EVP_MD_CTX_init(&md_ctx); |
| |
| EVP_MD_CTX_copy_ex( &md_ctx,hash); |
| 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); |
| |
| EVP_MD_CTX_copy_ex( &md_ctx,hash); |
| 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(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++) |
| { |
| EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL); |
| EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i])); |
| 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); |
| |
| EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL); |
| 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); |
| |
| #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, |
| tmpout, SSL3_MASTER_SECRET_SIZE, |
| s, s->msg_callback_arg); |
| } |
| #endif |
| 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); |
| default: return(-1); |
| } |
| } |
| |