Compare encodings in X509_cmp as well as hash.
[openssl.git] / ssl / t1_enc.c
1 /* ssl/t1_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
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.
8  * 
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).
15  * 
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.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
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)"
40  * 
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
51  * SUCH DAMAGE.
52  * 
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.]
57  */
58 /* ====================================================================
59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  *    notice, this list of conditions and the following disclaimer. 
67  *
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
71  *    distribution.
72  *
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/)"
77  *
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.
82  *
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.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  *    acknowledgment:
89  *    "This product includes software developed by the OpenSSL Project
90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
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  * ====================================================================
105  *
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).
109  *
110  */
111 /* ====================================================================
112  * Copyright 2005 Nokia. All rights reserved.
113  *
114  * The portions of the attached software ("Contribution") is developed by
115  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
116  * license.
117  *
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.
121  *
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.
125  *
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.
130  *
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
135  * OTHERWISE.
136  */
137
138 #include <stdio.h>
139 #include "ssl_locl.h"
140 #ifndef OPENSSL_NO_COMP
141 #include <openssl/comp.h>
142 #endif
143 #include <openssl/evp.h>
144 #include <openssl/hmac.h>
145 #include <openssl/md5.h>
146 #include <openssl/rand.h>
147 #ifdef KSSL_DEBUG
148 #include <openssl/des.h>
149 #endif
150
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
153                         int sec_len,
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)
160         {
161         int chunk;
162         size_t j;
163         EVP_MD_CTX ctx, ctx_tmp, ctx_init;
164         EVP_PKEY *mac_key;
165         unsigned char A1[EVP_MAX_MD_SIZE];
166         size_t A1_len;
167         int ret = 0;
168         
169         chunk=EVP_MD_size(md);
170         OPENSSL_assert(chunk >= 0);
171
172         EVP_MD_CTX_init(&ctx);
173         EVP_MD_CTX_init(&ctx_tmp);
174         EVP_MD_CTX_init(&ctx_init);
175         EVP_MD_CTX_set_flags(&ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176         mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
177         if (!mac_key)
178                 goto err;
179         if (!EVP_DigestSignInit(&ctx_init,NULL,md, NULL, mac_key))
180                 goto err;
181         if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
182                 goto err;
183         if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
184                 goto err;
185         if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
186                 goto err;
187         if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
188                 goto err;
189         if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
190                 goto err;
191         if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
192                 goto err;
193         if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
194                 goto err;
195
196         for (;;)
197                 {
198                 /* Reinit mac contexts */
199                 if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
200                         goto err;
201                 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
202                         goto err;
203                 if (olen>chunk && !EVP_MD_CTX_copy_ex(&ctx_tmp,&ctx))
204                         goto err;
205                 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
206                         goto err;
207                 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
208                         goto err;
209                 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
210                         goto err;
211                 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
212                         goto err;
213                 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
214                         goto err;
215
216                 if (olen > chunk)
217                         {
218                         if (!EVP_DigestSignFinal(&ctx,out,&j))
219                                 goto err;
220                         out+=j;
221                         olen-=j;
222                         /* calc the next A1 value */
223                         if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
224                                 goto err;
225                         }
226                 else    /* last one */
227                         {
228                         if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
229                                 goto err;
230                         memcpy(out,A1,olen);
231                         break;
232                         }
233                 }
234         ret = 1;
235 err:
236         EVP_PKEY_free(mac_key);
237         EVP_MD_CTX_cleanup(&ctx);
238         EVP_MD_CTX_cleanup(&ctx_tmp);
239         EVP_MD_CTX_cleanup(&ctx_init);
240         OPENSSL_cleanse(A1,sizeof(A1));
241         return ret;
242         }
243
244 /* seed1 through seed5 are virtually concatenated */
245 static int tls1_PRF(long digest_mask,
246                      const void *seed1, int seed1_len,
247                      const void *seed2, int seed2_len,
248                      const void *seed3, int seed3_len,
249                      const void *seed4, int seed4_len,
250                      const void *seed5, int seed5_len,
251                      const unsigned char *sec, int slen,
252                      unsigned char *out1,
253                      unsigned char *out2, int olen)
254         {
255         int len,i,idx,count;
256         const unsigned char *S1;
257         long m;
258         const EVP_MD *md;
259         int ret = 0;
260
261         /* Count number of digests and partition sec evenly */
262         count=0;
263         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
264                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
265         }       
266         len=slen/count;
267         if (count == 1)
268                 slen = 0;
269         S1=sec;
270         memset(out1,0,olen);
271         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
272                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
273                         if (!md) {
274                                 SSLerr(SSL_F_TLS1_PRF,
275                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
276                                 goto err;                               
277                         }
278                         if (!tls1_P_hash(md ,S1,len+(slen&1),
279                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
280                                         out2,olen))
281                                 goto err;
282                         S1+=len;
283                         for (i=0; i<olen; i++)
284                         {
285                                 out1[i]^=out2[i];
286                         }
287                 }
288         }
289         ret = 1;
290 err:
291         return ret;
292 }
293 static int tls1_generate_key_block(SSL *s, unsigned char *km,
294              unsigned char *tmp, int num)
295         {
296         int ret;
297         ret = tls1_PRF(ssl_get_algorithm2(s),
298                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
299                  s->s3->server_random,SSL3_RANDOM_SIZE,
300                  s->s3->client_random,SSL3_RANDOM_SIZE,
301                  NULL,0,NULL,0,
302                  s->session->master_key,s->session->master_key_length,
303                  km,tmp,num);
304 #ifdef KSSL_DEBUG
305         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
306                 s->session->master_key_length);
307         {
308         int i;
309         for (i=0; i < s->session->master_key_length; i++)
310                 {
311                 printf("%02X", s->session->master_key[i]);
312                 }
313         printf("\n");  }
314 #endif    /* KSSL_DEBUG */
315         return ret;
316         }
317
318 int tls1_change_cipher_state(SSL *s, int which)
319         {
320         static const unsigned char empty[]="";
321         unsigned char *p,*mac_secret;
322         unsigned char *exp_label;
323         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
324         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
325         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
326         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
327         unsigned char *ms,*key,*iv;
328         int client_write;
329         EVP_CIPHER_CTX *dd;
330         const EVP_CIPHER *c;
331 #ifndef OPENSSL_NO_COMP
332         const SSL_COMP *comp;
333 #endif
334         const EVP_MD *m;
335         int mac_type;
336         int *mac_secret_size;
337         EVP_MD_CTX *mac_ctx;
338         EVP_PKEY *mac_key;
339         int is_export,n,i,j,k,exp_label_len,cl;
340         int reuse_dd = 0;
341
342         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
343         c=s->s3->tmp.new_sym_enc;
344         m=s->s3->tmp.new_hash;
345         mac_type = s->s3->tmp.new_mac_pkey_type;
346 #ifndef OPENSSL_NO_COMP
347         comp=s->s3->tmp.new_compression;
348 #endif
349
350 #ifdef KSSL_DEBUG
351         printf("tls1_change_cipher_state(which= %d) w/\n", which);
352         printf("\talg= %ld/%ld, comp= %p\n",
353                s->s3->tmp.new_cipher->algorithm_mkey,
354                s->s3->tmp.new_cipher->algorithm_auth,
355                comp);
356         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
357         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
358                 c->nid,c->block_size,c->key_len,c->iv_len);
359         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
360         {
361         int i;
362         for (i=0; i<s->s3->tmp.key_block_length; i++)
363                 printf("%02x", s->s3->tmp.key_block[i]);  printf("\n");
364         }
365 #endif  /* KSSL_DEBUG */
366
367         if (which & SSL3_CC_READ)
368                 {
369                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
370                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
371                 else
372                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
373
374                 if (s->enc_read_ctx != NULL)
375                         reuse_dd = 1;
376                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
377                         goto err;
378                 else
379                         /* make sure it's intialized in case we exit later with an error */
380                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
381                 dd= s->enc_read_ctx;
382                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
383 #ifndef OPENSSL_NO_COMP
384                 if (s->expand != NULL)
385                         {
386                         COMP_CTX_free(s->expand);
387                         s->expand=NULL;
388                         }
389                 if (comp != NULL)
390                         {
391                         s->expand=COMP_CTX_new(comp->method);
392                         if (s->expand == NULL)
393                                 {
394                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
395                                 goto err2;
396                                 }
397                         if (s->s3->rrec.comp == NULL)
398                                 s->s3->rrec.comp=(unsigned char *)
399                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
400                         if (s->s3->rrec.comp == NULL)
401                                 goto err;
402                         }
403 #endif
404                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
405                 if (s->version != DTLS1_VERSION)
406                         memset(&(s->s3->read_sequence[0]),0,8);
407                 mac_secret= &(s->s3->read_mac_secret[0]);
408                 mac_secret_size=&(s->s3->read_mac_secret_size);
409                 }
410         else
411                 {
412                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
413                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
414                         else
415                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
416                 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
417                         reuse_dd = 1;
418                 else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
419                         goto err;
420                 dd= s->enc_write_ctx;
421                 if (SSL_IS_DTLS(s))
422                         {
423                         mac_ctx = EVP_MD_CTX_create();
424                         if (!mac_ctx)
425                                 goto err;
426                         s->write_hash = mac_ctx;
427                         }
428                 else
429                         mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
430 #ifndef OPENSSL_NO_COMP
431                 if (s->compress != NULL)
432                         {
433                         COMP_CTX_free(s->compress);
434                         s->compress=NULL;
435                         }
436                 if (comp != NULL)
437                         {
438                         s->compress=COMP_CTX_new(comp->method);
439                         if (s->compress == NULL)
440                                 {
441                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
442                                 goto err2;
443                                 }
444                         }
445 #endif
446                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
447                 if (s->version != DTLS1_VERSION)
448                         memset(&(s->s3->write_sequence[0]),0,8);
449                 mac_secret= &(s->s3->write_mac_secret[0]);
450                 mac_secret_size = &(s->s3->write_mac_secret_size);
451                 }
452
453         if (reuse_dd)
454                 EVP_CIPHER_CTX_cleanup(dd);
455
456         p=s->s3->tmp.key_block;
457         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
458
459         cl=EVP_CIPHER_key_length(c);
460         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
461                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
462         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
463         /* If GCM mode only part of IV comes from PRF */
464         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
465                 k = EVP_GCM_TLS_FIXED_IV_LEN;
466         else
467                 k=EVP_CIPHER_iv_length(c);
468         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
469                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
470                 {
471                 ms=  &(p[ 0]); n=i+i;
472                 key= &(p[ n]); n+=j+j;
473                 iv=  &(p[ n]); n+=k+k;
474                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
475                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
476                 client_write=1;
477                 }
478         else
479                 {
480                 n=i;
481                 ms=  &(p[ n]); n+=i+j;
482                 key= &(p[ n]); n+=j+k;
483                 iv=  &(p[ n]); n+=k;
484                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
485                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
486                 client_write=0;
487                 }
488
489         if (n > s->s3->tmp.key_block_length)
490                 {
491                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
492                 goto err2;
493                 }
494
495         memcpy(mac_secret,ms,i);
496
497         if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
498                 {
499                 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
500                                 mac_secret,*mac_secret_size);
501                 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
502                 EVP_PKEY_free(mac_key);
503                 }
504 #ifdef TLS_DEBUG
505 printf("which = %04X\nmac key=",which);
506 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
507 #endif
508         if (is_export)
509                 {
510                 /* In here I set both the read and write key/iv to the
511                  * same value since only the correct one will be used :-).
512                  */
513                 if (!tls1_PRF(ssl_get_algorithm2(s),
514                                 exp_label,exp_label_len,
515                                 s->s3->client_random,SSL3_RANDOM_SIZE,
516                                 s->s3->server_random,SSL3_RANDOM_SIZE,
517                                 NULL,0,NULL,0,
518                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
519                         goto err2;
520                 key=tmp1;
521
522                 if (k > 0)
523                         {
524                         if (!tls1_PRF(ssl_get_algorithm2(s),
525                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
526                                         s->s3->client_random,SSL3_RANDOM_SIZE,
527                                         s->s3->server_random,SSL3_RANDOM_SIZE,
528                                         NULL,0,NULL,0,
529                                         empty,0,iv1,iv2,k*2))
530                                 goto err2;
531                         if (client_write)
532                                 iv=iv1;
533                         else
534                                 iv= &(iv1[k]);
535                         }
536                 }
537
538         s->session->key_arg_length=0;
539 #ifdef KSSL_DEBUG
540         {
541         int i;
542         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
543         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
544         printf("\n");
545         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
546         printf("\n");
547         }
548 #endif  /* KSSL_DEBUG */
549
550         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
551                 {
552                 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
553                 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
554                 }
555         else    
556                 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
557
558         /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
559         if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
560                 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
561                                 *mac_secret_size,mac_secret);
562
563 #ifdef OPENSSL_SSL_TRACE_CRYPTO
564         if (s->msg_callback)
565                 {
566                 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
567                 if (*mac_secret_size)
568                         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
569                                                 mac_secret, *mac_secret_size,
570                                                 s, s->msg_callback_arg);
571                 if (c->key_len)
572                         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
573                                                 key, c->key_len,
574                                                 s, s->msg_callback_arg);
575                 if (k)
576                         {
577                         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
578                                 wh |= TLS1_RT_CRYPTO_FIXED_IV;
579                         else
580                                 wh |= TLS1_RT_CRYPTO_IV;
581                         s->msg_callback(2, s->version, wh, iv, k,
582                                                 s, s->msg_callback_arg);
583                         }
584                 }
585 #endif
586
587 #ifdef TLS_DEBUG
588 printf("which = %04X\nkey=",which);
589 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
590 printf("\niv=");
591 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
592 printf("\n");
593 #endif
594
595         OPENSSL_cleanse(tmp1,sizeof(tmp1));
596         OPENSSL_cleanse(tmp2,sizeof(tmp1));
597         OPENSSL_cleanse(iv1,sizeof(iv1));
598         OPENSSL_cleanse(iv2,sizeof(iv2));
599         return(1);
600 err:
601         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
602 err2:
603         return(0);
604         }
605
606 int tls1_setup_key_block(SSL *s)
607         {
608         unsigned char *p1,*p2=NULL;
609         const EVP_CIPHER *c;
610         const EVP_MD *hash;
611         int num;
612         SSL_COMP *comp;
613         int mac_type= NID_undef,mac_secret_size=0;
614         int ret=0;
615
616 #ifdef KSSL_DEBUG
617         printf ("tls1_setup_key_block()\n");
618 #endif  /* KSSL_DEBUG */
619
620         if (s->s3->tmp.key_block_length != 0)
621                 return(1);
622
623         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp, SSL_USE_ETM(s)))
624                 {
625                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
626                 return(0);
627                 }
628
629         s->s3->tmp.new_sym_enc=c;
630         s->s3->tmp.new_hash=hash;
631         s->s3->tmp.new_mac_pkey_type = mac_type;
632         s->s3->tmp.new_mac_secret_size = mac_secret_size;
633         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
634         num*=2;
635
636         ssl3_cleanup_key_block(s);
637
638         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
639                 {
640                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
641                 goto err;
642                 }
643
644         s->s3->tmp.key_block_length=num;
645         s->s3->tmp.key_block=p1;
646
647         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
648                 {
649                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
650                 goto err;
651                 }
652
653 #ifdef TLS_DEBUG
654 printf("client random\n");
655 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
656 printf("server random\n");
657 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
658 printf("pre-master\n");
659 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
660 #endif
661         if (!tls1_generate_key_block(s,p1,p2,num))
662                 goto err;
663 #ifdef TLS_DEBUG
664 printf("\nkey block\n");
665 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
666 #endif
667
668         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
669                 && s->method->version <= TLS1_VERSION)
670                 {
671                 /* enable vulnerability countermeasure for CBC ciphers with
672                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
673                  */
674                 s->s3->need_empty_fragments = 1;
675
676                 if (s->session->cipher != NULL)
677                         {
678                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
679                                 s->s3->need_empty_fragments = 0;
680                         
681 #ifndef OPENSSL_NO_RC4
682                         if (s->session->cipher->algorithm_enc == SSL_RC4)
683                                 s->s3->need_empty_fragments = 0;
684 #endif
685                         }
686                 }
687                 
688         ret = 1;
689 err:
690         if (p2)
691                 {
692                 OPENSSL_cleanse(p2,num);
693                 OPENSSL_free(p2);
694                 }
695         return(ret);
696         }
697
698 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
699  *
700  * Returns:
701  *   0: (in non-constant time) if the record is publically invalid (i.e. too
702  *       short etc).
703  *   1: if the record's padding is valid / the encryption was successful.
704  *   -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
705  *       an internal error occurred.
706  */
707 int tls1_enc(SSL *s, int send)
708         {
709         SSL3_RECORD *rec;
710         EVP_CIPHER_CTX *ds;
711         unsigned long l;
712         int bs,i,j,k,pad=0,ret,mac_size=0;
713         const EVP_CIPHER *enc;
714
715         if (send)
716                 {
717                 if (EVP_MD_CTX_md(s->write_hash))
718                         {
719                         int n=EVP_MD_CTX_size(s->write_hash);
720                         OPENSSL_assert(n >= 0);
721                         }
722                 ds=s->enc_write_ctx;
723                 rec= &(s->s3->wrec);
724                 if (s->enc_write_ctx == NULL)
725                         enc=NULL;
726                 else
727                         {
728                         int ivlen;
729                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
730                         /* For TLSv1.1 and later explicit IV */
731                         if (SSL_USE_EXPLICIT_IV(s)
732                                 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
733                                 ivlen = EVP_CIPHER_iv_length(enc);
734                         else
735                                 ivlen = 0;
736                         if (ivlen > 1)
737                                 {
738                                 if ( rec->data != rec->input)
739                                         /* we can't write into the input stream:
740                                          * Can this ever happen?? (steve)
741                                          */
742                                         fprintf(stderr,
743                                                 "%s:%d: rec->data != rec->input\n",
744                                                 __FILE__, __LINE__);
745                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
746                                         return -1;
747                                 }
748                         }
749                 }
750         else
751                 {
752                 if (EVP_MD_CTX_md(s->read_hash))
753                         {
754                         int n=EVP_MD_CTX_size(s->read_hash);
755                         OPENSSL_assert(n >= 0);
756                         }
757                 ds=s->enc_read_ctx;
758                 rec= &(s->s3->rrec);
759                 if (s->enc_read_ctx == NULL)
760                         enc=NULL;
761                 else
762                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
763                 }
764
765 #ifdef KSSL_DEBUG
766         printf("tls1_enc(%d)\n", send);
767 #endif    /* KSSL_DEBUG */
768
769         if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
770                 {
771                 memmove(rec->data,rec->input,rec->length);
772                 rec->input=rec->data;
773                 ret = 1;
774                 }
775         else
776                 {
777                 l=rec->length;
778                 bs=EVP_CIPHER_block_size(ds->cipher);
779
780                 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
781                         {
782                         unsigned char buf[13],*seq;
783
784                         seq = send?s->s3->write_sequence:s->s3->read_sequence;
785
786                         if (SSL_IS_DTLS(s))
787                                 {
788                                 unsigned char dtlsseq[9],*p=dtlsseq;
789
790                                 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
791                                 memcpy(p,&seq[2],6);
792                                 memcpy(buf,dtlsseq,8);
793                                 }
794                         else
795                                 {
796                                 memcpy(buf,seq,8);
797                                 for (i=7; i>=0; i--)    /* increment */
798                                         {
799                                         ++seq[i];
800                                         if (seq[i] != 0) break; 
801                                         }
802                                 }
803
804                         buf[8]=rec->type;
805                         buf[9]=(unsigned char)(s->version>>8);
806                         buf[10]=(unsigned char)(s->version);
807                         buf[11]=rec->length>>8;
808                         buf[12]=rec->length&0xff;
809                         pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
810                         if (send)
811                                 {
812                                 l+=pad;
813                                 rec->length+=pad;
814                                 }
815                         }
816                 else if ((bs != 1) && send)
817                         {
818                         i=bs-((int)l%bs);
819
820                         /* Add weird padding of upto 256 bytes */
821
822                         /* we need to add 'i' padding bytes of value j */
823                         j=i-1;
824                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
825                                 {
826                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
827                                         j++;
828                                 }
829                         for (k=(int)l; k<(int)(l+i); k++)
830                                 rec->input[k]=j;
831                         l+=i;
832                         rec->length+=i;
833                         }
834
835 #ifdef KSSL_DEBUG
836                 {
837                 unsigned long ui;
838                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
839                         ds,rec->data,rec->input,l);
840                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
841                         ds->buf_len, ds->cipher->key_len,
842                         DES_KEY_SZ, DES_SCHEDULE_SZ,
843                         ds->cipher->iv_len);
844                 printf("\t\tIV: ");
845                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
846                 printf("\n");
847                 printf("\trec->input=");
848                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
849                 printf("\n");
850                 }
851 #endif  /* KSSL_DEBUG */
852
853                 if (!send)
854                         {
855                         if (l == 0 || l%bs != 0)
856                                 return 0;
857                         }
858                 
859                 i = EVP_Cipher(ds,rec->data,rec->input,l);
860                 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
861                                                 ?(i<0)
862                                                 :(i==0))
863                         return -1;      /* AEAD can fail to verify MAC */
864                 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
865                         {
866                         rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
867                         rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
868                         rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
869                         }
870
871 #ifdef KSSL_DEBUG
872                 {
873                 unsigned long i;
874                 printf("\trec->data=");
875                 for (i=0; i<l; i++)
876                         printf(" %02x", rec->data[i]);  printf("\n");
877                 }
878 #endif  /* KSSL_DEBUG */
879
880                 ret = 1;
881                 if (!SSL_USE_ETM(s) && EVP_MD_CTX_md(s->read_hash) != NULL)
882                         mac_size = EVP_MD_CTX_size(s->read_hash);
883                 if ((bs != 1) && !send)
884                         ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
885                 if (pad && !send)
886                         rec->length -= pad;
887                 }
888         return ret;
889         }
890
891 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
892         {
893         unsigned int ret;
894         EVP_MD_CTX ctx, *d=NULL;
895         int i;
896
897         if (s->s3->handshake_buffer) 
898                 if (!ssl3_digest_cached_records(s))
899                         return 0;
900
901         for (i=0;i<SSL_MAX_DIGEST;i++) 
902                 {
903                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 
904                         {
905                         d=s->s3->handshake_dgst[i];
906                         break;
907                         }
908                 }
909         if (!d) {
910                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
911                 return 0;
912         }       
913
914         EVP_MD_CTX_init(&ctx);
915         EVP_MD_CTX_copy_ex(&ctx,d);
916         EVP_DigestFinal_ex(&ctx,out,&ret);
917         EVP_MD_CTX_cleanup(&ctx);
918         return((int)ret);
919         }
920
921 int tls1_final_finish_mac(SSL *s,
922              const char *str, int slen, unsigned char *out)
923         {
924         unsigned int i;
925         EVP_MD_CTX ctx;
926         unsigned char buf[2*EVP_MAX_MD_SIZE];
927         unsigned char *q,buf2[12];
928         int idx;
929         long mask;
930         int err=0;
931         const EVP_MD *md; 
932
933         q=buf;
934
935         if (s->s3->handshake_buffer) 
936                 if (!ssl3_digest_cached_records(s))
937                         return 0;
938
939         EVP_MD_CTX_init(&ctx);
940
941         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
942                 {
943                 if (mask & ssl_get_algorithm2(s))
944                         {
945                         int hashsize = EVP_MD_size(md);
946                         EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
947                         if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
948                                 {
949                                 /* internal error: 'buf' is too small for this cipersuite! */
950                                 err = 1;
951                                 }
952                         else
953                                 {
954                                 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
955                                         !EVP_DigestFinal_ex(&ctx,q,&i) ||
956                                         (i != (unsigned int)hashsize))
957                                         err = 1;
958                                 q+=hashsize;
959                                 }
960                         }
961                 }
962                 
963         if (!tls1_PRF(ssl_get_algorithm2(s),
964                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
965                         s->session->master_key,s->session->master_key_length,
966                         out,buf2,sizeof buf2))
967                 err = 1;
968         EVP_MD_CTX_cleanup(&ctx);
969
970         if (err)
971                 return 0;
972         else
973                 return sizeof buf2;
974         }
975
976 int tls1_mac(SSL *ssl, unsigned char *md, int send)
977         {
978         SSL3_RECORD *rec;
979         unsigned char *seq;
980         EVP_MD_CTX *hash;
981         size_t md_size;
982         int i;
983         EVP_MD_CTX hmac, *mac_ctx;
984         unsigned char header[13];
985         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
986         int t;
987
988         if (send)
989                 {
990                 rec= &(ssl->s3->wrec);
991                 seq= &(ssl->s3->write_sequence[0]);
992                 hash=ssl->write_hash;
993                 }
994         else
995                 {
996                 rec= &(ssl->s3->rrec);
997                 seq= &(ssl->s3->read_sequence[0]);
998                 hash=ssl->read_hash;
999                 }
1000
1001         t=EVP_MD_CTX_size(hash);
1002         OPENSSL_assert(t >= 0);
1003         md_size=t;
1004
1005         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1006         if (stream_mac) 
1007                 {
1008                         mac_ctx = hash;
1009                 }
1010                 else
1011                 {
1012                         EVP_MD_CTX_copy(&hmac,hash);
1013                         mac_ctx = &hmac;
1014                 }
1015
1016         if (SSL_IS_DTLS(ssl))
1017                 {
1018                 unsigned char dtlsseq[8],*p=dtlsseq;
1019
1020                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
1021                 memcpy (p,&seq[2],6);
1022
1023                 memcpy(header, dtlsseq, 8);
1024                 }
1025         else
1026                 memcpy(header, seq, 8);
1027
1028         header[8]=rec->type;
1029         header[9]=(unsigned char)(ssl->version>>8);
1030         header[10]=(unsigned char)(ssl->version);
1031         header[11]=(rec->length)>>8;
1032         header[12]=(rec->length)&0xff;
1033
1034         if (!send && !SSL_USE_ETM(ssl) &&
1035             EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1036             ssl3_cbc_record_digest_supported(mac_ctx))
1037                 {
1038                 /* This is a CBC-encrypted record. We must avoid leaking any
1039                  * timing-side channel information about how many blocks of
1040                  * data we are hashing because that gives an attacker a
1041                  * timing-oracle. */
1042                 ssl3_cbc_digest_record(
1043                         mac_ctx,
1044                         md, &md_size,
1045                         header, rec->input,
1046                         rec->length + md_size, rec->orig_len,
1047                         ssl->s3->read_mac_secret,
1048                         ssl->s3->read_mac_secret_size,
1049                         0 /* not SSLv3 */);
1050                 }
1051         else
1052                 {
1053                 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1054                 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1055                 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1056                 OPENSSL_assert(t > 0);
1057 #ifdef OPENSSL_FIPS
1058                 if (!send && !SSL_USE_ETM(ssl) && FIPS_mode())
1059                         tls_fips_digest_extra(
1060                                         ssl->enc_read_ctx,
1061                                         mac_ctx, rec->input,
1062                                         rec->length, rec->orig_len);
1063 #endif
1064                 }
1065                 
1066         if (!stream_mac)
1067                 EVP_MD_CTX_cleanup(&hmac);
1068 #ifdef TLS_DEBUG
1069 printf("sec=");
1070 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
1071 printf("seq=");
1072 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1073 printf("buf=");
1074 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
1075 printf("rec=");
1076 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
1077 #endif
1078
1079         if (!SSL_IS_DTLS(ssl))
1080                 {
1081                 for (i=7; i>=0; i--)
1082                         {
1083                         ++seq[i];
1084                         if (seq[i] != 0) break; 
1085                         }
1086                 }
1087
1088 #ifdef TLS_DEBUG
1089 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1090 #endif
1091         return(md_size);
1092         }
1093
1094 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1095              int len)
1096         {
1097         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1098         const void *co = NULL, *so = NULL;
1099         int col = 0, sol = 0;
1100
1101
1102 #ifdef KSSL_DEBUG
1103         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1104 #endif  /* KSSL_DEBUG */
1105
1106 #ifdef TLSEXT_TYPE_opaque_prf_input
1107         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1108             s->s3->client_opaque_prf_input_len > 0 &&
1109             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1110                 {
1111                 co = s->s3->client_opaque_prf_input;
1112                 col = s->s3->server_opaque_prf_input_len;
1113                 so = s->s3->server_opaque_prf_input;
1114                 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) */
1115                 }
1116 #endif
1117
1118         tls1_PRF(ssl_get_algorithm2(s),
1119                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1120                 s->s3->client_random,SSL3_RANDOM_SIZE,
1121                 co, col,
1122                 s->s3->server_random,SSL3_RANDOM_SIZE,
1123                 so, sol,
1124                 p,len,
1125                 s->session->master_key,buff,sizeof buff);
1126 #ifdef SSL_DEBUG
1127         fprintf(stderr, "Premaster Secret:\n");
1128         BIO_dump_fp(stderr, (char *)p, len);
1129         fprintf(stderr, "Client Random:\n");
1130         BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1131         fprintf(stderr, "Server Random:\n");
1132         BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1133         fprintf(stderr, "Master Secret:\n");
1134         BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1135 #endif
1136
1137 #ifdef OPENSSL_SSL_TRACE_CRYPTO
1138         if (s->msg_callback)
1139                 {
1140                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
1141                                                 p, len, s, s->msg_callback_arg);
1142                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
1143                                         s->s3->client_random, SSL3_RANDOM_SIZE,
1144                                                 s, s->msg_callback_arg);
1145                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
1146                                         s->s3->server_random, SSL3_RANDOM_SIZE,
1147                                         s, s->msg_callback_arg);
1148                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
1149                                         s->session->master_key,
1150                                         SSL3_MASTER_SECRET_SIZE,
1151                                         s, s->msg_callback_arg);
1152                 }
1153 #endif
1154
1155 #ifdef KSSL_DEBUG
1156         printf ("tls1_generate_master_secret() complete\n");
1157 #endif  /* KSSL_DEBUG */
1158         return(SSL3_MASTER_SECRET_SIZE);
1159         }
1160
1161 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1162          const char *label, size_t llen, const unsigned char *context,
1163          size_t contextlen, int use_context)
1164         {
1165         unsigned char *buff;
1166         unsigned char *val = NULL;
1167         size_t vallen, currentvalpos;
1168         int rv;
1169
1170 #ifdef KSSL_DEBUG
1171         printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
1172 #endif  /* KSSL_DEBUG */
1173
1174         buff = OPENSSL_malloc(olen);
1175         if (buff == NULL) goto err2;
1176
1177         /* construct PRF arguments
1178          * we construct the PRF argument ourself rather than passing separate
1179          * values into the TLS PRF to ensure that the concatenation of values
1180          * does not create a prohibited label.
1181          */
1182         vallen = llen + SSL3_RANDOM_SIZE * 2;
1183         if (use_context)
1184                 {
1185                 vallen += 2 + contextlen;
1186                 }
1187
1188         val = OPENSSL_malloc(vallen);
1189         if (val == NULL) goto err2;
1190         currentvalpos = 0;
1191         memcpy(val + currentvalpos, (unsigned char *) label, llen);
1192         currentvalpos += llen;
1193         memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1194         currentvalpos += SSL3_RANDOM_SIZE;
1195         memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1196         currentvalpos += SSL3_RANDOM_SIZE;
1197
1198         if (use_context)
1199                 {
1200                 val[currentvalpos] = (contextlen >> 8) & 0xff;
1201                 currentvalpos++;
1202                 val[currentvalpos] = contextlen & 0xff;
1203                 currentvalpos++;
1204                 if ((contextlen > 0) || (context != NULL))
1205                         {
1206                         memcpy(val + currentvalpos, context, contextlen);
1207                         }
1208                 }
1209
1210         /* disallow prohibited labels
1211          * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1212          * 15, so size of val > max(prohibited label len) = 15 and the
1213          * comparisons won't have buffer overflow
1214          */
1215         if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1216                  TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1217         if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1218                  TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1219         if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1220                  TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1221         if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1222                  TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1223
1224         rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1225                       val, vallen,
1226                       NULL, 0,
1227                       NULL, 0,
1228                       NULL, 0,
1229                       NULL, 0,
1230                       s->session->master_key,s->session->master_key_length,
1231                       out,buff,olen);
1232
1233 #ifdef KSSL_DEBUG
1234         printf ("tls1_export_keying_material() complete\n");
1235 #endif  /* KSSL_DEBUG */
1236         goto ret;
1237 err1:
1238         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1239         rv = 0;
1240         goto ret;
1241 err2:
1242         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1243         rv = 0;
1244 ret:
1245         if (buff != NULL) OPENSSL_free(buff);
1246         if (val != NULL) OPENSSL_free(val);
1247         return(rv);
1248         }
1249
1250 int tls1_alert_code(int code)
1251         {
1252         switch (code)
1253                 {
1254         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1255         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1256         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1257         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1258         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1259         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1260         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1261         case SSL_AD_NO_CERTIFICATE:     return(-1);
1262         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1263         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1264         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1265         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1266         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1267         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1268         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1269         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1270         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1271         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1272         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1273         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1274         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1275         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1276         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1277         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1278         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1279         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1280         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1281         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1282         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1283         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1284 #if 0 /* not appropriate for TLS, not used for DTLS */
1285         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 
1286                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1287 #endif
1288         default:                        return(-1);
1289                 }
1290         }