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 #ifndef OPENSSL_NO_COMP
141 #include <openssl/comp.h>
143 #include <openssl/evp.h>
144 #include <openssl/hmac.h>
145 #include <openssl/md5.h>
146 #include <openssl/rand.h>
148 #include <openssl/des.h>
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
154 const void *seed1, int seed1_len,
155 const void *seed2, int seed2_len,
156 const void *seed3, int seed3_len,
157 const void *seed4, int seed4_len,
158 const void *seed5, int seed5_len,
159 unsigned char *out, int olen)
165 unsigned char A1[EVP_MAX_MD_SIZE];
169 chunk=EVP_MD_size(md);
170 OPENSSL_assert(chunk >= 0);
173 HMAC_CTX_init(&ctx_tmp);
174 if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL))
176 if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL))
178 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
180 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
182 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
184 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
186 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
188 if (!HMAC_Final(&ctx,A1,&A1_len))
194 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */
196 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */
198 if (!HMAC_Update(&ctx,A1,A1_len))
200 if (!HMAC_Update(&ctx_tmp,A1,A1_len))
202 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
204 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
206 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
208 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
210 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
215 if (!HMAC_Final(&ctx,out,&j))
219 if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */
224 if (!HMAC_Final(&ctx,A1,&A1_len))
232 HMAC_CTX_cleanup(&ctx);
233 HMAC_CTX_cleanup(&ctx_tmp);
234 OPENSSL_cleanse(A1,sizeof(A1));
238 /* seed1 through seed5 are virtually concatenated */
239 static int tls1_PRF(long digest_mask,
240 const void *seed1, int seed1_len,
241 const void *seed2, int seed2_len,
242 const void *seed3, int seed3_len,
243 const void *seed4, int seed4_len,
244 const void *seed5, int seed5_len,
245 const unsigned char *sec, int slen,
247 unsigned char *out2, int olen)
250 const unsigned char *S1;
255 /* Count number of digests and partition sec evenly */
257 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
258 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
263 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
264 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
266 SSLerr(SSL_F_TLS1_PRF,
267 SSL_R_UNSUPPORTED_DIGEST_TYPE);
270 if (!tls1_P_hash(md ,S1,len+(slen&1),
271 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
275 for (i=0; i<olen; i++)
285 static int tls1_generate_key_block(SSL *s, unsigned char *km,
286 unsigned char *tmp, int num)
289 ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
290 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
291 s->s3->server_random,SSL3_RANDOM_SIZE,
292 s->s3->client_random,SSL3_RANDOM_SIZE,
294 s->session->master_key,s->session->master_key_length,
297 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
298 s->session->master_key_length);
301 for (i=0; i < s->session->master_key_length; i++)
303 printf("%02X", s->session->master_key[i]);
306 #endif /* KSSL_DEBUG */
310 int tls1_change_cipher_state(SSL *s, int which)
312 static const unsigned char empty[]="";
313 unsigned char *p,*key_block,*mac_secret;
314 unsigned char *exp_label;
315 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
316 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
317 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
318 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
319 unsigned char *ms,*key,*iv,*er1,*er2;
323 #ifndef OPENSSL_NO_COMP
324 const SSL_COMP *comp;
328 int *mac_secret_size;
331 int is_export,n,i,j,k,exp_label_len,cl;
334 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
335 c=s->s3->tmp.new_sym_enc;
336 m=s->s3->tmp.new_hash;
337 mac_type = s->s3->tmp.new_mac_pkey_type;
338 #ifndef OPENSSL_NO_COMP
339 comp=s->s3->tmp.new_compression;
341 key_block=s->s3->tmp.key_block;
344 printf("tls1_change_cipher_state(which= %d) w/\n", which);
345 printf("\talg= %ld/%ld, comp= %p\n",
346 s->s3->tmp.new_cipher->algorithm_mkey,
347 s->s3->tmp.new_cipher->algorithm_auth,
349 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
350 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
351 c->nid,c->block_size,c->key_len,c->iv_len);
352 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
355 for (i=0; i<s->s3->tmp.key_block_length; i++)
356 printf("%02x", key_block[i]); printf("\n");
358 #endif /* KSSL_DEBUG */
360 if (which & SSL3_CC_READ)
362 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
363 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
365 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
367 if (s->enc_read_ctx != NULL)
369 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
372 /* make sure it's intialized in case we exit later with an error */
373 EVP_CIPHER_CTX_init(s->enc_read_ctx);
375 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
376 #ifndef OPENSSL_NO_COMP
377 if (s->expand != NULL)
379 COMP_CTX_free(s->expand);
384 s->expand=COMP_CTX_new(comp->method);
385 if (s->expand == NULL)
387 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
390 if (s->s3->rrec.comp == NULL)
391 s->s3->rrec.comp=(unsigned char *)
392 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
393 if (s->s3->rrec.comp == NULL)
397 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
398 if (s->version != DTLS1_VERSION)
399 memset(&(s->s3->read_sequence[0]),0,8);
400 mac_secret= &(s->s3->read_mac_secret[0]);
401 mac_secret_size=&(s->s3->read_mac_secret_size);
405 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
406 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
408 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
409 if (s->enc_write_ctx != NULL)
411 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
414 /* make sure it's intialized in case we exit later with an error */
415 EVP_CIPHER_CTX_init(s->enc_write_ctx);
416 dd= s->enc_write_ctx;
417 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
418 #ifndef OPENSSL_NO_COMP
419 if (s->compress != NULL)
421 COMP_CTX_free(s->compress);
426 s->compress=COMP_CTX_new(comp->method);
427 if (s->compress == NULL)
429 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
434 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
435 if (s->version != DTLS1_VERSION)
436 memset(&(s->s3->write_sequence[0]),0,8);
437 mac_secret= &(s->s3->write_mac_secret[0]);
438 mac_secret_size = &(s->s3->write_mac_secret_size);
442 EVP_CIPHER_CTX_cleanup(dd);
444 p=s->s3->tmp.key_block;
445 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
447 cl=EVP_CIPHER_key_length(c);
448 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
449 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
450 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
451 k=EVP_CIPHER_iv_length(c);
452 er1= &(s->s3->client_random[0]);
453 er2= &(s->s3->server_random[0]);
454 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
455 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
458 key= &(p[ n]); n+=j+j;
459 iv= &(p[ n]); n+=k+k;
460 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
461 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
467 ms= &(p[ n]); n+=i+j;
468 key= &(p[ n]); n+=j+k;
470 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
471 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
475 if (n > s->s3->tmp.key_block_length)
477 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
481 memcpy(mac_secret,ms,i);
482 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
483 mac_secret,*mac_secret_size);
484 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
485 EVP_PKEY_free(mac_key);
487 printf("which = %04X\nmac key=",which);
488 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
492 /* In here I set both the read and write key/iv to the
493 * same value since only the correct one will be used :-).
495 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
496 exp_label,exp_label_len,
497 s->s3->client_random,SSL3_RANDOM_SIZE,
498 s->s3->server_random,SSL3_RANDOM_SIZE,
500 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
506 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
507 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
508 s->s3->client_random,SSL3_RANDOM_SIZE,
509 s->s3->server_random,SSL3_RANDOM_SIZE,
511 empty,0,iv1,iv2,k*2))
520 s->session->key_arg_length=0;
524 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
525 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
527 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
530 #endif /* KSSL_DEBUG */
532 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
534 printf("which = %04X\nkey=",which);
535 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
537 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
541 OPENSSL_cleanse(tmp1,sizeof(tmp1));
542 OPENSSL_cleanse(tmp2,sizeof(tmp1));
543 OPENSSL_cleanse(iv1,sizeof(iv1));
544 OPENSSL_cleanse(iv2,sizeof(iv2));
547 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
552 int tls1_setup_key_block(SSL *s)
554 unsigned char *p1,*p2=NULL;
559 int mac_type= NID_undef,mac_secret_size=0;
563 printf ("tls1_setup_key_block()\n");
564 #endif /* KSSL_DEBUG */
566 if (s->s3->tmp.key_block_length != 0)
569 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
571 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
575 s->s3->tmp.new_sym_enc=c;
576 s->s3->tmp.new_hash=hash;
577 s->s3->tmp.new_mac_pkey_type = mac_type;
578 s->s3->tmp.new_mac_secret_size = mac_secret_size;
579 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
582 ssl3_cleanup_key_block(s);
584 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
586 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
590 s->s3->tmp.key_block_length=num;
591 s->s3->tmp.key_block=p1;
593 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
595 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
600 printf("client random\n");
601 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
602 printf("server random\n");
603 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
604 printf("pre-master\n");
605 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
607 if (!tls1_generate_key_block(s,p1,p2,num))
610 printf("\nkey block\n");
611 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
614 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
616 /* enable vulnerability countermeasure for CBC ciphers with
617 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
619 s->s3->need_empty_fragments = 1;
621 if (s->session->cipher != NULL)
623 if (s->session->cipher->algorithm_enc == SSL_eNULL)
624 s->s3->need_empty_fragments = 0;
626 #ifndef OPENSSL_NO_RC4
627 if (s->session->cipher->algorithm_enc == SSL_RC4)
628 s->s3->need_empty_fragments = 0;
637 OPENSSL_cleanse(p2,num);
643 int tls1_enc(SSL *s, int send)
649 const EVP_CIPHER *enc;
653 if (EVP_MD_CTX_md(s->write_hash))
655 n=EVP_MD_CTX_size(s->write_hash);
656 OPENSSL_assert(n >= 0);
660 if (s->enc_write_ctx == NULL)
665 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
666 /* For TLSv1.1 and later explicit IV */
667 if (s->version >= TLS1_1_VERSION)
668 ivlen = EVP_CIPHER_iv_length(enc);
673 if ( rec->data != rec->input)
674 /* we can't write into the input stream:
675 * Can this ever happen?? (steve)
678 "%s:%d: rec->data != rec->input\n",
680 else if (RAND_bytes(rec->input, ivlen) <= 0)
687 if (EVP_MD_CTX_md(s->read_hash))
689 n=EVP_MD_CTX_size(s->read_hash);
690 OPENSSL_assert(n >= 0);
694 if (s->enc_read_ctx == NULL)
697 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
701 printf("tls1_enc(%d)\n", send);
702 #endif /* KSSL_DEBUG */
704 if ((s->session == NULL) || (ds == NULL) ||
707 memmove(rec->data,rec->input,rec->length);
708 rec->input=rec->data;
713 bs=EVP_CIPHER_block_size(ds->cipher);
715 if ((bs != 1) && send)
719 /* Add weird padding of upto 256 bytes */
721 /* we need to add 'i' padding bytes of value j */
723 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
725 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
728 for (k=(int)l; k<(int)(l+i); k++)
737 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
738 ds,rec->data,rec->input,l);
739 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
740 ds->buf_len, ds->cipher->key_len,
741 DES_KEY_SZ, DES_SCHEDULE_SZ,
744 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
746 printf("\trec->input=");
747 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
750 #endif /* KSSL_DEBUG */
754 if (l == 0 || l%bs != 0)
756 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
757 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
762 EVP_Cipher(ds,rec->data,rec->input,l);
767 printf("\trec->data=");
769 printf(" %02x", rec->data[i]); printf("\n");
771 #endif /* KSSL_DEBUG */
773 if ((bs != 1) && !send)
775 ii=i=rec->data[l-1]; /* padding_length */
777 /* NB: if compression is in operation the first packet
778 * may not be of even length so the padding bug check
779 * cannot be performed. This bug workaround has been
780 * around since SSLeay so hopefully it is either fixed
781 * now or no buggy implementation supports compression
784 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
787 /* First packet is even in size, so check */
788 if ((memcmp(s->s3->read_sequence,
789 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
790 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
791 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
794 /* TLS 1.0 does not bound the number of padding bytes by the block size.
795 * All of them must have value 'padding_length'. */
796 if (i > (int)rec->length)
798 /* Incorrect padding. SSLerr() and ssl3_alert are done
799 * by caller: we don't want to reveal whether this is
800 * a decryption error or a MAC verification failure
801 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
804 for (j=(int)(l-i); j<(int)l; j++)
806 if (rec->data[j] != ii)
808 /* Incorrect padding */
813 if (s->version >= TLS1_1_VERSION)
815 rec->data += bs; /* skip the explicit IV */
823 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
826 EVP_MD_CTX ctx, *d=NULL;
829 if (s->s3->handshake_buffer)
830 if (!ssl3_digest_cached_records(s))
833 for (i=0;i<SSL_MAX_DIGEST;i++)
835 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
837 d=s->s3->handshake_dgst[i];
842 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
846 EVP_MD_CTX_init(&ctx);
847 EVP_MD_CTX_copy_ex(&ctx,d);
848 EVP_DigestFinal_ex(&ctx,out,&ret);
849 EVP_MD_CTX_cleanup(&ctx);
853 int tls1_final_finish_mac(SSL *s,
854 const char *str, int slen, unsigned char *out)
858 unsigned char buf[2*EVP_MAX_MD_SIZE];
859 unsigned char *q,buf2[12];
867 if (s->s3->handshake_buffer)
868 if (!ssl3_digest_cached_records(s))
871 EVP_MD_CTX_init(&ctx);
873 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
875 if (mask & s->s3->tmp.new_cipher->algorithm2)
877 int hashsize = EVP_MD_size(md);
878 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
880 /* internal error: 'buf' is too small for this cipersuite! */
885 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
886 EVP_DigestFinal_ex(&ctx,q,&i);
887 if (i != (unsigned int)hashsize) /* can't really happen */
894 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
895 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
896 s->session->master_key,s->session->master_key_length,
897 out,buf2,sizeof buf2))
899 EVP_MD_CTX_cleanup(&ctx);
907 int tls1_mac(SSL *ssl, unsigned char *md, int send)
910 unsigned char *mac_sec,*seq;
914 EVP_MD_CTX hmac, *mac_ctx;
915 unsigned char buf[5];
916 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
921 rec= &(ssl->s3->wrec);
922 mac_sec= &(ssl->s3->write_mac_secret[0]);
923 seq= &(ssl->s3->write_sequence[0]);
924 hash=ssl->write_hash;
928 rec= &(ssl->s3->rrec);
929 mac_sec= &(ssl->s3->read_mac_secret[0]);
930 seq= &(ssl->s3->read_sequence[0]);
934 t=EVP_MD_CTX_size(hash);
935 OPENSSL_assert(t >= 0);
939 buf[1]=(unsigned char)(ssl->version>>8);
940 buf[2]=(unsigned char)(ssl->version);
941 buf[3]=rec->length>>8;
942 buf[4]=rec->length&0xff;
944 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
951 EVP_MD_CTX_copy(&hmac,hash);
955 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
957 unsigned char dtlsseq[8],*p=dtlsseq;
959 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
960 memcpy (p,&seq[2],6);
962 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
965 EVP_DigestSignUpdate(mac_ctx,seq,8);
967 EVP_DigestSignUpdate(mac_ctx,buf,5);
968 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
969 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
970 OPENSSL_assert(t > 0);
972 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
975 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
977 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
979 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
981 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
984 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
989 if (seq[i] != 0) break;
994 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
999 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1002 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1003 const void *co = NULL, *so = NULL;
1004 int col = 0, sol = 0;
1007 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1008 #endif /* KSSL_DEBUG */
1010 #ifdef TLSEXT_TYPE_opaque_prf_input
1011 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1012 s->s3->client_opaque_prf_input_len > 0 &&
1013 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1015 co = s->s3->client_opaque_prf_input;
1016 col = s->s3->server_opaque_prf_input_len;
1017 so = s->s3->server_opaque_prf_input;
1018 sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
1022 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1023 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1024 s->s3->client_random,SSL3_RANDOM_SIZE,
1026 s->s3->server_random,SSL3_RANDOM_SIZE,
1029 s->session->master_key,buff,sizeof buff);
1032 printf ("tls1_generate_master_secret() complete\n");
1033 #endif /* KSSL_DEBUG */
1034 return(SSL3_MASTER_SECRET_SIZE);
1037 int tls1_alert_code(int code)
1041 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1042 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1043 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1044 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1045 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1046 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1047 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1048 case SSL_AD_NO_CERTIFICATE: return(-1);
1049 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1050 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1051 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1052 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1053 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1054 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1055 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1056 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1057 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1058 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1059 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1060 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1061 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1062 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1063 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1064 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1065 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1066 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1067 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1068 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1069 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1070 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1071 #if 0 /* not appropriate for TLS, not used for DTLS */
1072 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1073 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1075 default: return(-1);