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/comp.h>
141 #include <openssl/evp.h>
142 #include <openssl/hmac.h>
143 #include <openssl/md5.h>
145 #include <openssl/des.h>
148 /* seed1 through seed5 are virtually concatenated */
149 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
151 const void *seed1, int seed1_len,
152 const void *seed2, int seed2_len,
153 const void *seed3, int seed3_len,
154 const void *seed4, int seed4_len,
155 const void *seed5, int seed5_len,
156 unsigned char *out, int olen)
162 unsigned char A1[EVP_MAX_MD_SIZE];
165 chunk=EVP_MD_size(md);
168 HMAC_CTX_init(&ctx_tmp);
169 HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
170 HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
171 if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
172 if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
173 if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
174 if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
175 if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
176 HMAC_Final(&ctx,A1,&A1_len);
181 HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
182 HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
183 HMAC_Update(&ctx,A1,A1_len);
184 HMAC_Update(&ctx_tmp,A1,A1_len);
185 if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
186 if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
187 if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
188 if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
189 if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
193 HMAC_Final(&ctx,out,&j);
196 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
200 HMAC_Final(&ctx,A1,&A1_len);
205 HMAC_CTX_cleanup(&ctx);
206 HMAC_CTX_cleanup(&ctx_tmp);
207 OPENSSL_cleanse(A1,sizeof(A1));
210 /* seed1 through seed5 are virtually concatenated */
211 static void tls1_PRF(long digest_mask,
212 const void *seed1, int seed1_len,
213 const void *seed2, int seed2_len,
214 const void *seed3, int seed3_len,
215 const void *seed4, int seed4_len,
216 const void *seed5, int seed5_len,
217 const unsigned char *sec, int slen,
219 unsigned char *out2, int olen)
222 const unsigned char *S1;
226 /* Count number of digests and partition sec evenly */
228 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
229 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
234 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
235 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
237 SSLerr(SSL_F_TLS1_PRF,
238 SSL_R_UNSUPPORTED_DIGEST_TYPE);
241 tls1_P_hash(md ,S1,len+(slen&1),
242 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
245 for (i=0; i<olen; i++)
253 static void tls1_generate_key_block(SSL *s, unsigned char *km,
254 unsigned char *tmp, int num)
256 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
257 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
258 s->s3->server_random,SSL3_RANDOM_SIZE,
259 s->s3->client_random,SSL3_RANDOM_SIZE,
261 s->session->master_key,s->session->master_key_length,
264 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
265 s->session->master_key_length);
268 for (i=0; i < s->session->master_key_length; i++)
270 printf("%02X", s->session->master_key[i]);
273 #endif /* KSSL_DEBUG */
276 int tls1_change_cipher_state(SSL *s, int which)
278 static const unsigned char empty[]="";
279 unsigned char *p,*key_block,*mac_secret;
280 unsigned char *exp_label;
281 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
282 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
283 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
284 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
285 unsigned char *ms,*key,*iv,*er1,*er2;
289 #ifndef OPENSSL_NO_COMP
290 const SSL_COMP *comp;
294 int *mac_secret_size;
297 int is_export,n,i,j,k,exp_label_len,cl;
300 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
301 c=s->s3->tmp.new_sym_enc;
302 m=s->s3->tmp.new_hash;
303 mac_type = s->s3->tmp.new_mac_pkey_type;
304 #ifndef OPENSSL_NO_COMP
305 comp=s->s3->tmp.new_compression;
307 key_block=s->s3->tmp.key_block;
310 printf("tls1_change_cipher_state(which= %d) w/\n", which);
311 printf("\talg= %ld/%ld, comp= %p\n",
312 s->s3->tmp.new_cipher->algorithm_mkey,
313 s->s3->tmp.new_cipher->algorithm_auth,
315 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
316 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
317 c->nid,c->block_size,c->key_len,c->iv_len);
318 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
321 for (i=0; i<s->s3->tmp.key_block_length; i++)
322 printf("%02x", key_block[i]); printf("\n");
324 #endif /* KSSL_DEBUG */
326 if (which & SSL3_CC_READ)
328 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
329 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
331 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
333 if (s->enc_read_ctx != NULL)
335 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
338 /* make sure it's intialized in case we exit later with an error */
339 EVP_CIPHER_CTX_init(s->enc_read_ctx);
341 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
342 #ifndef OPENSSL_NO_COMP
343 if (s->expand != NULL)
345 COMP_CTX_free(s->expand);
350 s->expand=COMP_CTX_new(comp->method);
351 if (s->expand == NULL)
353 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
356 if (s->s3->rrec.comp == NULL)
357 s->s3->rrec.comp=(unsigned char *)
358 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
359 if (s->s3->rrec.comp == NULL)
363 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
364 if (s->version != DTLS1_VERSION)
365 memset(&(s->s3->read_sequence[0]),0,8);
366 mac_secret= &(s->s3->read_mac_secret[0]);
367 mac_secret_size=&(s->s3->read_mac_secret_size);
371 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
372 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
374 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
375 if (s->enc_write_ctx != NULL)
377 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
380 /* make sure it's intialized in case we exit later with an error */
381 EVP_CIPHER_CTX_init(s->enc_write_ctx);
382 dd= s->enc_write_ctx;
383 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
384 #ifndef OPENSSL_NO_COMP
385 if (s->compress != NULL)
387 COMP_CTX_free(s->compress);
392 s->compress=COMP_CTX_new(comp->method);
393 if (s->compress == NULL)
395 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
400 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
401 if (s->version != DTLS1_VERSION)
402 memset(&(s->s3->write_sequence[0]),0,8);
403 mac_secret= &(s->s3->write_mac_secret[0]);
404 mac_secret_size = &(s->s3->write_mac_secret_size);
408 EVP_CIPHER_CTX_cleanup(dd);
410 p=s->s3->tmp.key_block;
411 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
413 cl=EVP_CIPHER_key_length(c);
414 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
415 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
416 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
417 k=EVP_CIPHER_iv_length(c);
418 er1= &(s->s3->client_random[0]);
419 er2= &(s->s3->server_random[0]);
420 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
421 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
424 key= &(p[ n]); n+=j+j;
425 iv= &(p[ n]); n+=k+k;
426 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
427 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
433 ms= &(p[ n]); n+=i+j;
434 key= &(p[ n]); n+=j+k;
436 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
437 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
441 if (n > s->s3->tmp.key_block_length)
443 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
447 memcpy(mac_secret,ms,i);
448 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
449 mac_secret,*mac_secret_size);
450 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
451 EVP_PKEY_free(mac_key);
453 printf("which = %04X\nmac key=",which);
454 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
458 /* In here I set both the read and write key/iv to the
459 * same value since only the correct one will be used :-).
461 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
462 exp_label,exp_label_len,
463 s->s3->client_random,SSL3_RANDOM_SIZE,
464 s->s3->server_random,SSL3_RANDOM_SIZE,
466 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c));
471 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
472 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
473 s->s3->client_random,SSL3_RANDOM_SIZE,
474 s->s3->server_random,SSL3_RANDOM_SIZE,
476 empty,0,iv1,iv2,k*2);
484 s->session->key_arg_length=0;
488 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
489 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
491 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
494 #endif /* KSSL_DEBUG */
496 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
498 printf("which = %04X\nkey=",which);
499 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
501 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
505 OPENSSL_cleanse(tmp1,sizeof(tmp1));
506 OPENSSL_cleanse(tmp2,sizeof(tmp1));
507 OPENSSL_cleanse(iv1,sizeof(iv1));
508 OPENSSL_cleanse(iv2,sizeof(iv2));
511 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
516 int tls1_setup_key_block(SSL *s)
518 unsigned char *p1,*p2;
523 int mac_type= NID_undef,mac_secret_size=0;
526 printf ("tls1_setup_key_block()\n");
527 #endif /* KSSL_DEBUG */
529 if (s->s3->tmp.key_block_length != 0)
532 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
534 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
538 s->s3->tmp.new_sym_enc=c;
539 s->s3->tmp.new_hash=hash;
540 s->s3->tmp.new_mac_pkey_type = mac_type;
541 s->s3->tmp.new_mac_secret_size = mac_secret_size;
542 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
545 ssl3_cleanup_key_block(s);
547 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
549 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
552 s->s3->tmp.key_block_length=num;
553 s->s3->tmp.key_block=p1;
557 printf("client random\n");
558 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
559 printf("server random\n");
560 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
561 printf("pre-master\n");
562 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
564 tls1_generate_key_block(s,p1,p2,num);
565 OPENSSL_cleanse(p2,num);
568 printf("\nkey block\n");
569 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
572 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
574 /* enable vulnerability countermeasure for CBC ciphers with
575 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
577 s->s3->need_empty_fragments = 1;
579 if (s->session->cipher != NULL)
581 if (s->session->cipher->algorithm_enc == SSL_eNULL)
582 s->s3->need_empty_fragments = 0;
584 #ifndef OPENSSL_NO_RC4
585 if (s->session->cipher->algorithm_enc == SSL_RC4)
586 s->s3->need_empty_fragments = 0;
593 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
597 int tls1_enc(SSL *s, int send)
603 const EVP_CIPHER *enc;
607 if (EVP_MD_CTX_md(s->write_hash))
608 n=EVP_MD_CTX_size(s->write_hash);
611 if (s->enc_write_ctx == NULL)
614 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
618 if (EVP_MD_CTX_md(s->read_hash))
619 n=EVP_MD_CTX_size(s->read_hash);
622 if (s->enc_read_ctx == NULL)
625 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
629 printf("tls1_enc(%d)\n", send);
630 #endif /* KSSL_DEBUG */
632 if ((s->session == NULL) || (ds == NULL) ||
635 memmove(rec->data,rec->input,rec->length);
636 rec->input=rec->data;
641 bs=EVP_CIPHER_block_size(ds->cipher);
643 if ((bs != 1) && send)
647 /* Add weird padding of upto 256 bytes */
649 /* we need to add 'i' padding bytes of value j */
651 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
653 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
656 for (k=(int)l; k<(int)(l+i); k++)
665 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
666 ds,rec->data,rec->input,l);
667 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
668 ds->buf_len, ds->cipher->key_len,
669 DES_KEY_SZ, DES_SCHEDULE_SZ,
672 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
674 printf("\trec->input=");
675 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
678 #endif /* KSSL_DEBUG */
682 if (l == 0 || l%bs != 0)
684 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
685 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
690 EVP_Cipher(ds,rec->data,rec->input,l);
695 printf("\trec->data=");
697 printf(" %02x", rec->data[i]); printf("\n");
699 #endif /* KSSL_DEBUG */
701 if ((bs != 1) && !send)
703 ii=i=rec->data[l-1]; /* padding_length */
705 /* NB: if compression is in operation the first packet
706 * may not be of even length so the padding bug check
707 * cannot be performed. This bug workaround has been
708 * around since SSLeay so hopefully it is either fixed
709 * now or no buggy implementation supports compression
712 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
715 /* First packet is even in size, so check */
716 if ((memcmp(s->s3->read_sequence,
717 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
718 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
719 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
722 /* TLS 1.0 does not bound the number of padding bytes by the block size.
723 * All of them must have value 'padding_length'. */
724 if (i > (int)rec->length)
726 /* Incorrect padding. SSLerr() and ssl3_alert are done
727 * by caller: we don't want to reveal whether this is
728 * a decryption error or a MAC verification failure
729 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
732 for (j=(int)(l-i); j<(int)l; j++)
734 if (rec->data[j] != ii)
736 /* Incorrect padding */
745 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
748 EVP_MD_CTX ctx, *d=NULL;
751 if (s->s3->handshake_buffer)
752 ssl3_digest_cached_records(s);
753 for (i=0;i<SSL_MAX_DIGEST;i++)
755 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
757 d=s->s3->handshake_dgst[i];
762 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
766 EVP_MD_CTX_init(&ctx);
767 EVP_MD_CTX_copy_ex(&ctx,d);
768 EVP_DigestFinal_ex(&ctx,out,&ret);
769 EVP_MD_CTX_cleanup(&ctx);
773 int tls1_final_finish_mac(SSL *s,
774 const char *str, int slen, unsigned char *out)
778 unsigned char buf[2*EVP_MAX_MD_SIZE];
779 unsigned char *q,buf2[12];
787 EVP_MD_CTX_init(&ctx);
789 if (s->s3->handshake_buffer)
790 ssl3_digest_cached_records(s);
792 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
794 if (mask & s->s3->tmp.new_cipher->algorithm2)
796 unsigned int hashsize = EVP_MD_size(md);
797 if (hashsize > (sizeof buf - (size_t)(q-buf)))
799 /* internal error: 'buf' is too small for this cipersuite! */
804 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
805 EVP_DigestFinal_ex(&ctx,q,&i);
806 if (i != hashsize) /* can't really happen */
813 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
814 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
815 s->session->master_key,s->session->master_key_length,
816 out,buf2,sizeof buf2);
817 EVP_MD_CTX_cleanup(&ctx);
825 int tls1_mac(SSL *ssl, unsigned char *md, int send)
828 unsigned char *mac_sec,*seq;
832 EVP_MD_CTX hmac, *mac_ctx;
833 unsigned char buf[5];
834 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
838 rec= &(ssl->s3->wrec);
839 mac_sec= &(ssl->s3->write_mac_secret[0]);
840 seq= &(ssl->s3->write_sequence[0]);
841 hash=ssl->write_hash;
845 rec= &(ssl->s3->rrec);
846 mac_sec= &(ssl->s3->read_mac_secret[0]);
847 seq= &(ssl->s3->read_sequence[0]);
851 md_size=EVP_MD_CTX_size(hash);
854 buf[1]=(unsigned char)(ssl->version>>8);
855 buf[2]=(unsigned char)(ssl->version);
856 buf[3]=rec->length>>8;
857 buf[4]=rec->length&0xff;
859 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
866 EVP_MD_CTX_copy(&hmac,hash);
870 if (ssl->version == DTLS1_VERSION)
872 unsigned char dtlsseq[8],*p=dtlsseq;
874 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
875 memcpy (p,&seq[2],6);
877 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
880 EVP_DigestSignUpdate(mac_ctx,seq,8);
882 EVP_DigestSignUpdate(mac_ctx,buf,5);
883 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
884 EVP_DigestSignFinal(mac_ctx,md,&md_size);
885 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
888 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
890 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
892 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
894 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
897 if (ssl->version != DTLS1_VERSION)
902 if (seq[i] != 0) break;
907 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
912 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
915 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
916 const void *co = NULL, *so = NULL;
917 int col = 0, sol = 0;
920 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
921 #endif /* KSSL_DEBUG */
923 #ifdef TLSEXT_TYPE_opaque_prf_input
924 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
925 s->s3->client_opaque_prf_input_len > 0 &&
926 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
928 co = s->s3->client_opaque_prf_input;
929 col = s->s3->server_opaque_prf_input_len;
930 so = s->s3->server_opaque_prf_input;
931 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) */
935 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
936 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
937 s->s3->client_random,SSL3_RANDOM_SIZE,
939 s->s3->server_random,SSL3_RANDOM_SIZE,
942 s->session->master_key,buff,sizeof buff);
945 printf ("tls1_generate_master_secret() complete\n");
946 #endif /* KSSL_DEBUG */
947 return(SSL3_MASTER_SECRET_SIZE);
950 int tls1_alert_code(int code)
954 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
955 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
956 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
957 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
958 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
959 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
960 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
961 case SSL_AD_NO_CERTIFICATE: return(-1);
962 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
963 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
964 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
965 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
966 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
967 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
968 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
969 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
970 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
971 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
972 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
973 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
974 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
975 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
976 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
977 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
978 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
979 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
980 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
981 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
982 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
983 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
984 #if 0 /* not appropriate for TLS, not used for DTLS */
985 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
986 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);