2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
139 #include "ssl_locl.h"
140 #include <openssl/evp.h>
141 #include <openssl/md5.h>
143 static unsigned char ssl3_pad_1[48]={
144 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
145 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
146 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
147 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
148 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
149 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
151 static unsigned char ssl3_pad_2[48]={
152 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
153 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
154 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
155 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
156 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
157 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
158 static int ssl3_handshake_mac(SSL *s, int md_nid,
159 const char *sender, int len, unsigned char *p);
160 static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
164 unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
168 #ifdef CHARSET_EBCDIC
169 c = os_toascii[c]; /*'A' in ASCII */
172 EVP_MD_CTX_init(&m5);
173 EVP_MD_CTX_init(&s1);
174 for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
179 /* bug: 'buf' is too small for this ciphersuite */
180 SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
187 EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
188 EVP_DigestUpdate(&s1,buf,k);
189 EVP_DigestUpdate(&s1,s->session->master_key,
190 s->session->master_key_length);
191 EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
192 EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
193 EVP_DigestFinal_ex(&s1,smd,NULL);
195 EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
196 EVP_DigestUpdate(&m5,s->session->master_key,
197 s->session->master_key_length);
198 EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
199 if ((int)(i+MD5_DIGEST_LENGTH) > num)
201 EVP_DigestFinal_ex(&m5,smd,NULL);
202 memcpy(km,smd,(num-i));
205 EVP_DigestFinal_ex(&m5,km,NULL);
207 km+=MD5_DIGEST_LENGTH;
209 OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
210 EVP_MD_CTX_cleanup(&m5);
211 EVP_MD_CTX_cleanup(&s1);
215 int ssl3_change_cipher_state(SSL *s, int which)
217 unsigned char *p,*key_block,*mac_secret;
218 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
219 unsigned char exp_iv[EVP_MAX_IV_LENGTH];
220 unsigned char *ms,*key,*iv,*er1,*er2;
223 #ifndef OPENSSL_NO_COMP
228 int is_exp,n,i,j,k,cl;
231 is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
232 c=s->s3->tmp.new_sym_enc;
233 m=s->s3->tmp.new_hash;
234 /* m == NULL will lead to a crash later */
236 #ifndef OPENSSL_NO_COMP
237 if (s->s3->tmp.new_compression == NULL)
240 comp=s->s3->tmp.new_compression->method;
242 key_block=s->s3->tmp.key_block;
244 if (which & SSL3_CC_READ)
246 if (s->enc_read_ctx != NULL)
248 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
251 /* make sure it's intialized in case we exit later with an error */
252 EVP_CIPHER_CTX_init(s->enc_read_ctx);
255 ssl_replace_hash(&s->read_hash,m);
256 #ifndef OPENSSL_NO_COMP
258 if (s->expand != NULL)
260 COMP_CTX_free(s->expand);
265 s->expand=COMP_CTX_new(comp);
266 if (s->expand == NULL)
268 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
271 if (s->s3->rrec.comp == NULL)
272 s->s3->rrec.comp=(unsigned char *)
273 OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
274 if (s->s3->rrec.comp == NULL)
278 memset(&(s->s3->read_sequence[0]),0,8);
279 mac_secret= &(s->s3->read_mac_secret[0]);
283 if (s->enc_write_ctx != NULL)
285 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
288 /* make sure it's intialized in case we exit later with an error */
289 EVP_CIPHER_CTX_init(s->enc_write_ctx);
290 dd= s->enc_write_ctx;
291 ssl_replace_hash(&s->write_hash,m);
292 #ifndef OPENSSL_NO_COMP
294 if (s->compress != NULL)
296 COMP_CTX_free(s->compress);
301 s->compress=COMP_CTX_new(comp);
302 if (s->compress == NULL)
304 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
309 memset(&(s->s3->write_sequence[0]),0,8);
310 mac_secret= &(s->s3->write_mac_secret[0]);
314 EVP_CIPHER_CTX_cleanup(dd);
316 p=s->s3->tmp.key_block;
318 cl=EVP_CIPHER_key_length(c);
319 j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
320 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
321 /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
322 k=EVP_CIPHER_iv_length(c);
323 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
324 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
327 key= &(p[ n]); n+=j+j;
328 iv= &(p[ n]); n+=k+k;
329 er1= &(s->s3->client_random[0]);
330 er2= &(s->s3->server_random[0]);
335 ms= &(p[ n]); n+=i+j;
336 key= &(p[ n]); n+=j+k;
338 er1= &(s->s3->server_random[0]);
339 er2= &(s->s3->client_random[0]);
342 if (n > s->s3->tmp.key_block_length)
344 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
348 EVP_MD_CTX_init(&md);
349 memcpy(mac_secret,ms,i);
352 /* In here I set both the read and write key/iv to the
353 * same value since only the correct one will be used :-).
355 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
356 EVP_DigestUpdate(&md,key,j);
357 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
358 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
359 EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
364 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
365 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
366 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
367 EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
372 s->session->key_arg_length=0;
374 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
376 OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
377 OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
378 EVP_MD_CTX_cleanup(&md);
381 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
386 int ssl3_setup_key_block(SSL *s)
395 if (s->s3->tmp.key_block_length != 0)
398 if (!ssl_cipher_get_evp(s->session,&c,&hash,NULL,NULL,&comp))
400 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
404 s->s3->tmp.new_sym_enc=c;
405 s->s3->tmp.new_hash=hash;
406 #ifdef OPENSSL_NO_COMP
407 s->s3->tmp.new_compression=NULL;
409 s->s3->tmp.new_compression=comp;
412 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
415 ssl3_cleanup_key_block(s);
417 if ((p=OPENSSL_malloc(num)) == NULL)
420 s->s3->tmp.key_block_length=num;
421 s->s3->tmp.key_block=p;
423 ret = ssl3_generate_key_block(s,p,num);
425 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
427 /* enable vulnerability countermeasure for CBC ciphers with
428 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
430 s->s3->need_empty_fragments = 1;
432 if (s->session->cipher != NULL)
434 if (s->session->cipher->algorithm_enc == SSL_eNULL)
435 s->s3->need_empty_fragments = 0;
437 #ifndef OPENSSL_NO_RC4
438 if (s->session->cipher->algorithm_enc == SSL_RC4)
439 s->s3->need_empty_fragments = 0;
447 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
451 void ssl3_cleanup_key_block(SSL *s)
453 if (s->s3->tmp.key_block != NULL)
455 OPENSSL_cleanse(s->s3->tmp.key_block,
456 s->s3->tmp.key_block_length);
457 OPENSSL_free(s->s3->tmp.key_block);
458 s->s3->tmp.key_block=NULL;
460 s->s3->tmp.key_block_length=0;
463 int ssl3_enc(SSL *s, int send)
469 const EVP_CIPHER *enc;
475 if (s->enc_write_ctx == NULL)
478 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
484 if (s->enc_read_ctx == NULL)
487 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
490 if ((s->session == NULL) || (ds == NULL) ||
493 memmove(rec->data,rec->input,rec->length);
494 rec->input=rec->data;
499 bs=EVP_CIPHER_block_size(ds->cipher);
503 if ((bs != 1) && send)
507 /* we need to add 'i-1' padding bytes */
510 rec->input[l-1]=(i-1);
515 if (l == 0 || l%bs != 0)
517 SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
518 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
521 /* otherwise, rec->length >= bs */
524 EVP_Cipher(ds,rec->data,rec->input,l);
526 if ((bs != 1) && !send)
529 /* SSL 3.0 bounds the number of padding bytes by the block size;
530 * padding bytes (except the last one) are arbitrary */
533 /* Incorrect padding. SSLerr() and ssl3_alert are done
534 * by caller: we don't want to reveal whether this is
535 * a decryption error or a MAC verification failure
536 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
539 /* now i <= bs <= rec->length */
546 void ssl3_init_finished_mac(SSL *s)
548 if (s->s3->handshake_buffer) BIO_free(s->s3->handshake_buffer);
549 if (s->s3->handshake_dgst) ssl3_free_digest_list(s);
550 s->s3->handshake_buffer=BIO_new(BIO_s_mem());
551 (void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE);
554 void ssl3_free_digest_list(SSL *s)
557 if (!s->s3->handshake_dgst) return;
558 for (i=0;i<SSL_MAX_DIGEST;i++)
560 if (s->s3->handshake_dgst[i])
561 EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
563 OPENSSL_free(s->s3->handshake_dgst);
564 s->s3->handshake_dgst=NULL;
569 void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
571 if (s->s3->handshake_buffer)
573 BIO_write (s->s3->handshake_buffer,(void *)buf,len);
578 for (i=0;i< SSL_MAX_DIGEST;i++)
580 if (s->s3->handshake_dgst[i]!= NULL)
581 EVP_DigestUpdate(s->s3->handshake_dgst[i],buf,len);
586 int ssl3_digest_cached_records(SSL *s)
594 /* Allocate handshake_dgst array */
595 ssl3_free_digest_list(s);
596 s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
597 memset(s->s3->handshake_dgst,0,SSL_MAX_DIGEST *sizeof(EVP_MD_CTX *));
598 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,&hdata);
601 SSLerr(SSL_F_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
605 /* Loop through bitso of algorithm2 field and create MD_CTX-es */
606 for (i=0;ssl_get_handshake_digest(i,&mask,&md); i++)
608 if ((mask & s->s3->tmp.new_cipher->algorithm2) && md)
610 s->s3->handshake_dgst[i]=EVP_MD_CTX_create();
611 EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL);
612 EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen);
616 s->s3->handshake_dgst[i]=NULL;
619 /* Free handshake_buffer BIO */
620 BIO_free(s->s3->handshake_buffer);
621 s->s3->handshake_buffer = NULL;
626 int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
628 return(ssl3_handshake_mac(s,md_nid,NULL,0,p));
630 int ssl3_final_finish_mac(SSL *s,
631 const char *sender, int len, unsigned char *p)
634 ret=ssl3_handshake_mac(s,NID_md5,sender,len,p);
636 ret+=ssl3_handshake_mac(s,NID_sha1,sender,len,p);
639 static int ssl3_handshake_mac(SSL *s, int md_nid,
640 const char *sender, int len, unsigned char *p)
645 unsigned char md_buf[EVP_MAX_MD_SIZE];
646 EVP_MD_CTX ctx,*d=NULL;
648 if (s->s3->handshake_buffer)
649 if (!ssl3_digest_cached_records(s))
652 /* Search for djgest of specified type in the handshake_dgst
654 for (i=0;i<SSL_MAX_DIGEST;i++)
656 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
658 d=s->s3->handshake_dgst[i];
663 SSLerr(SSL_F_SSL3_HANDSHAKE_MAC,SSL_R_NO_REQUIRED_DIGEST);
666 EVP_MD_CTX_init(&ctx);
667 EVP_MD_CTX_copy_ex(&ctx,d);
668 n=EVP_MD_CTX_size(&ctx);
671 EVP_DigestUpdate(&ctx,sender,len);
672 EVP_DigestUpdate(&ctx,s->session->master_key,
673 s->session->master_key_length);
674 EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
675 EVP_DigestFinal_ex(&ctx,md_buf,&i);
677 EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
678 EVP_DigestUpdate(&ctx,s->session->master_key,
679 s->session->master_key_length);
680 EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
681 EVP_DigestUpdate(&ctx,md_buf,i);
682 EVP_DigestFinal_ex(&ctx,p,&ret);
684 EVP_MD_CTX_cleanup(&ctx);
689 int ssl3_mac(SSL *ssl, unsigned char *md, int send)
692 unsigned char *mac_sec,*seq;
694 const EVP_MD_CTX *hash;
695 unsigned char *p,rec_char;
696 unsigned int md_size;
701 rec= &(ssl->s3->wrec);
702 mac_sec= &(ssl->s3->write_mac_secret[0]);
703 seq= &(ssl->s3->write_sequence[0]);
704 hash=ssl->write_hash;
708 rec= &(ssl->s3->rrec);
709 mac_sec= &(ssl->s3->read_mac_secret[0]);
710 seq= &(ssl->s3->read_sequence[0]);
714 /* If hash is NULL, then a crash will follow anyway */
715 OPENSSL_assert(hash);
716 md_size=EVP_MD_CTX_size(hash);
717 npad=(48/md_size)*md_size;
719 /* Chop the digest off the end :-) */
720 EVP_MD_CTX_init(&md_ctx);
722 EVP_MD_CTX_copy_ex( &md_ctx,hash);
723 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
724 EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
725 EVP_DigestUpdate(&md_ctx,seq,8);
727 EVP_DigestUpdate(&md_ctx,&rec_char,1);
730 EVP_DigestUpdate(&md_ctx,md,2);
731 EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
732 EVP_DigestFinal_ex( &md_ctx,md,NULL);
734 EVP_MD_CTX_copy_ex( &md_ctx,hash);
735 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
736 EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
737 EVP_DigestUpdate(&md_ctx,md,md_size);
738 EVP_DigestFinal_ex( &md_ctx,md,&md_size);
740 EVP_MD_CTX_cleanup(&md_ctx);
742 ssl3_record_sequence_update(seq);
746 void ssl3_record_sequence_update(unsigned char *seq)
753 if (seq[i] != 0) break;
757 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
760 static const unsigned char *salt[3]={
761 #ifndef CHARSET_EBCDIC
762 (const unsigned char *)"A",
763 (const unsigned char *)"BB",
764 (const unsigned char *)"CCC",
766 (const unsigned char *)"\x41",
767 (const unsigned char *)"\x42\x42",
768 (const unsigned char *)"\x43\x43\x43",
771 unsigned char buf[EVP_MAX_MD_SIZE];
776 EVP_MD_CTX_init(&ctx);
779 EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
780 EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
781 EVP_DigestUpdate(&ctx,p,len);
782 EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
784 EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
786 EVP_DigestFinal_ex(&ctx,buf,&n);
788 EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
789 EVP_DigestUpdate(&ctx,p,len);
790 EVP_DigestUpdate(&ctx,buf,n);
791 EVP_DigestFinal_ex(&ctx,out,&n);
795 EVP_MD_CTX_cleanup(&ctx);
799 int ssl3_alert_code(int code)
803 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
804 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
805 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
806 case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
807 case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
808 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
809 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
810 case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
811 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
812 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
813 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
814 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
815 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
816 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
817 case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
818 case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
819 case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
820 case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
821 case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
822 case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
823 case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
824 case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
825 case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
826 case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
827 case SSL_AD_UNSUPPORTED_EXTENSION: return(SSL3_AD_HANDSHAKE_FAILURE);
828 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(SSL3_AD_HANDSHAKE_FAILURE);
829 case SSL_AD_UNRECOGNIZED_NAME: return(SSL3_AD_HANDSHAKE_FAILURE);
830 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE);
831 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE);
832 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);