ispell (and minor modifications)
[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 #include <stdio.h>
60 #include <openssl/comp.h>
61 #include <openssl/md5.h>
62 #include <openssl/sha.h>
63 #include <openssl/evp.h>
64 #include <openssl/hmac.h>
65 #include "ssl_locl.h"
66
67 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
68                         int sec_len, unsigned char *seed, int seed_len,
69                         unsigned char *out, int olen)
70         {
71         int chunk,n;
72         unsigned int j;
73         HMAC_CTX ctx;
74         HMAC_CTX ctx_tmp;
75         unsigned char A1[HMAC_MAX_MD_CBLOCK];
76         unsigned int A1_len;
77         
78         chunk=EVP_MD_size(md);
79
80         HMAC_Init(&ctx,sec,sec_len,md);
81         HMAC_Update(&ctx,seed,seed_len);
82         HMAC_Final(&ctx,A1,&A1_len);
83
84         n=0;
85         for (;;)
86                 {
87                 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
88                 HMAC_Update(&ctx,A1,A1_len);
89                 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
90                 HMAC_Update(&ctx,seed,seed_len);
91
92                 if (olen > chunk)
93                         {
94                         HMAC_Final(&ctx,out,&j);
95                         out+=j;
96                         olen-=j;
97                         HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
98                         }
99                 else    /* last one */
100                         {
101                         HMAC_Final(&ctx,A1,&A1_len);
102                         memcpy(out,A1,olen);
103                         break;
104                         }
105                 }
106         HMAC_cleanup(&ctx);
107         HMAC_cleanup(&ctx_tmp);
108         memset(A1,0,sizeof(A1));
109         }
110
111 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
112                      unsigned char *label, int label_len,
113                      const unsigned char *sec, int slen, unsigned char *out1,
114                      unsigned char *out2, int olen)
115         {
116         int len,i;
117         const unsigned char *S1,*S2;
118
119         len=slen/2;
120         S1=sec;
121         S2= &(sec[len]);
122         len+=(slen&1); /* add for odd, make longer */
123
124         
125         tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
126         tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
127
128         for (i=0; i<olen; i++)
129                 out1[i]^=out2[i];
130         }
131
132 static void tls1_generate_key_block(SSL *s, unsigned char *km,
133              unsigned char *tmp, int num)
134         {
135         unsigned char *p;
136         unsigned char buf[SSL3_RANDOM_SIZE*2+
137                 TLS_MD_MAX_CONST_SIZE];
138         p=buf;
139
140         memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
141                 TLS_MD_KEY_EXPANSION_CONST_SIZE);
142         p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
143         memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
144         p+=SSL3_RANDOM_SIZE;
145         memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
146         p+=SSL3_RANDOM_SIZE;
147
148         tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
149                  s->session->master_key,s->session->master_key_length,
150                  km,tmp,num);
151         }
152
153 int tls1_change_cipher_state(SSL *s, int which)
154         {
155         static const unsigned char empty[]="";
156         unsigned char *p,*key_block,*mac_secret;
157         unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
158                 SSL3_RANDOM_SIZE*2];
159         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
160         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
161         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
162         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
163         unsigned char *ms,*key,*iv,*er1,*er2;
164         int client_write;
165         EVP_CIPHER_CTX *dd;
166         const EVP_CIPHER *c;
167         const SSL_COMP *comp;
168         const EVP_MD *m;
169         int _exp,n,i,j,k,exp_label_len,cl;
170
171         _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
172         c=s->s3->tmp.new_sym_enc;
173         m=s->s3->tmp.new_hash;
174         comp=s->s3->tmp.new_compression;
175         key_block=s->s3->tmp.key_block;
176
177         if (which & SSL3_CC_READ)
178                 {
179                 if ((s->enc_read_ctx == NULL) &&
180                         ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
181                         Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
182                         goto err;
183                 dd= s->enc_read_ctx;
184                 s->read_hash=m;
185                 if (s->expand != NULL)
186                         {
187                         COMP_CTX_free(s->expand);
188                         s->expand=NULL;
189                         }
190                 if (comp != NULL)
191                         {
192                         s->expand=COMP_CTX_new(comp->method);
193                         if (s->expand == NULL)
194                                 {
195                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
196                                 goto err2;
197                                 }
198                         if (s->s3->rrec.comp == NULL)
199                                 s->s3->rrec.comp=(unsigned char *)
200                                         Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
201                         if (s->s3->rrec.comp == NULL)
202                                 goto err;
203                         }
204                 memset(&(s->s3->read_sequence[0]),0,8);
205                 mac_secret= &(s->s3->read_mac_secret[0]);
206                 }
207         else
208                 {
209                 if ((s->enc_write_ctx == NULL) &&
210                         ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
211                         Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
212                         goto err;
213                 dd= s->enc_write_ctx;
214                 s->write_hash=m;
215                 if (s->compress != NULL)
216                         {
217                         COMP_CTX_free(s->compress);
218                         s->compress=NULL;
219                         }
220                 if (comp != NULL)
221                         {
222                         s->compress=COMP_CTX_new(comp->method);
223                         if (s->compress == NULL)
224                                 {
225                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
226                                 goto err2;
227                                 }
228                         }
229                 memset(&(s->s3->write_sequence[0]),0,8);
230                 mac_secret= &(s->s3->write_mac_secret[0]);
231                 }
232
233         EVP_CIPHER_CTX_init(dd);
234
235         p=s->s3->tmp.key_block;
236         i=EVP_MD_size(m);
237         cl=EVP_CIPHER_key_length(c);
238         j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
239                   cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
240         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
241         k=EVP_CIPHER_iv_length(c);
242         er1= &(s->s3->client_random[0]);
243         er2= &(s->s3->server_random[0]);
244         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
245                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
246                 {
247                 ms=  &(p[ 0]); n=i+i;
248                 key= &(p[ n]); n+=j+j;
249                 iv=  &(p[ n]); n+=k+k;
250                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
251                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
252                 client_write=1;
253                 }
254         else
255                 {
256                 n=i;
257                 ms=  &(p[ n]); n+=i+j;
258                 key= &(p[ n]); n+=j+k;
259                 iv=  &(p[ n]); n+=k;
260                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
261                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
262                 client_write=0;
263                 }
264
265         if (n > s->s3->tmp.key_block_length)
266                 {
267                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
268                 goto err2;
269                 }
270
271         memcpy(mac_secret,ms,i);
272 #ifdef TLS_DEBUG
273 printf("which = %04X\nmac key=",which);
274 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
275 #endif
276         if (_exp)
277                 {
278                 /* In here I set both the read and write key/iv to the
279                  * same value since only the correct one will be used :-).
280                  */
281                 p=buf;
282                 memcpy(p,exp_label,exp_label_len);
283                 p+=exp_label_len;
284                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
285                 p+=SSL3_RANDOM_SIZE;
286                 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
287                 p+=SSL3_RANDOM_SIZE;
288                 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
289                          tmp1,tmp2,EVP_CIPHER_key_length(c));
290                 key=tmp1;
291
292                 if (k > 0)
293                         {
294                         p=buf;
295                         memcpy(p,TLS_MD_IV_BLOCK_CONST,
296                                 TLS_MD_IV_BLOCK_CONST_SIZE);
297                         p+=TLS_MD_IV_BLOCK_CONST_SIZE;
298                         memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
299                         p+=SSL3_RANDOM_SIZE;
300                         memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
301                         p+=SSL3_RANDOM_SIZE;
302                         tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
303                                  iv1,iv2,k*2);
304                         if (client_write)
305                                 iv=iv1;
306                         else
307                                 iv= &(iv1[k]);
308                         }
309                 }
310
311         s->session->key_arg_length=0;
312
313         EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
314 #ifdef TLS_DEBUG
315 printf("which = %04X\nkey=",which);
316 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
317 printf("\niv=");
318 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
319 printf("\n");
320 #endif
321
322         memset(tmp1,0,sizeof(tmp1));
323         memset(tmp2,0,sizeof(tmp1));
324         memset(iv1,0,sizeof(iv1));
325         memset(iv2,0,sizeof(iv2));
326         return(1);
327 err:
328         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
329 err2:
330         return(0);
331         }
332
333 int tls1_setup_key_block(SSL *s)
334         {
335         unsigned char *p1,*p2;
336         const EVP_CIPHER *c;
337         const EVP_MD *hash;
338         int num;
339         SSL_COMP *comp;
340
341         if (s->s3->tmp.key_block_length != 0)
342                 return(1);
343
344         if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
345                 {
346                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
347                 return(0);
348                 }
349
350         s->s3->tmp.new_sym_enc=c;
351         s->s3->tmp.new_hash=hash;
352
353         num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
354         num*=2;
355
356         ssl3_cleanup_key_block(s);
357
358         if ((p1=(unsigned char *)Malloc(num)) == NULL)
359                 goto err;
360         if ((p2=(unsigned char *)Malloc(num)) == NULL)
361                 goto err;
362
363         s->s3->tmp.key_block_length=num;
364         s->s3->tmp.key_block=p1;
365
366
367 #ifdef TLS_DEBUG
368 printf("client random\n");
369 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
370 printf("server random\n");
371 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
372 printf("pre-master\n");
373 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
374 #endif
375         tls1_generate_key_block(s,p1,p2,num);
376         memset(p2,0,num);
377         Free(p2);
378 #ifdef TLS_DEBUG
379 printf("\nkey block\n");
380 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
381 #endif
382
383         return(1);
384 err:
385         SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
386         return(0);
387         }
388
389 int tls1_enc(SSL *s, int send)
390         {
391         SSL3_RECORD *rec;
392         EVP_CIPHER_CTX *ds;
393         unsigned long l;
394         int bs,i,ii,j,k,n=0;
395         const EVP_CIPHER *enc;
396
397         if (send)
398                 {
399                 if (s->write_hash != NULL)
400                         n=EVP_MD_size(s->write_hash);
401                 ds=s->enc_write_ctx;
402                 rec= &(s->s3->wrec);
403                 if (s->enc_write_ctx == NULL)
404                         enc=NULL;
405                 else
406                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
407                 }
408         else
409                 {
410                 if (s->read_hash != NULL)
411                         n=EVP_MD_size(s->read_hash);
412                 ds=s->enc_read_ctx;
413                 rec= &(s->s3->rrec);
414                 if (s->enc_read_ctx == NULL)
415                         enc=NULL;
416                 else
417                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
418                 }
419
420         if ((s->session == NULL) || (ds == NULL) ||
421                 (enc == NULL))
422                 {
423                 memcpy(rec->data,rec->input,rec->length);
424                 rec->input=rec->data;
425                 }
426         else
427                 {
428                 l=rec->length;
429                 bs=EVP_CIPHER_block_size(ds->cipher);
430
431                 if ((bs != 1) && send)
432                         {
433                         i=bs-((int)l%bs);
434
435                         /* Add weird padding of upto 256 bytes */
436
437                         /* we need to add 'i' padding bytes of value j */
438                         j=i-1;
439                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
440                                 {
441                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
442                                         j++;
443                                 }
444                         for (k=(int)l; k<(int)(l+i); k++)
445                                 rec->input[k]=j;
446                         l+=i;
447                         rec->length+=i;
448                         }
449
450                 EVP_Cipher(ds,rec->data,rec->input,l);
451
452                 if ((bs != 1) && !send)
453                         {
454                         ii=i=rec->data[l-1];
455                         i++;
456                         if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
457                                 {
458                                 /* First packet is even in size, so check */
459                                 if ((memcmp(s->s3->read_sequence,
460                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
461                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
462                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
463                                         i--;
464                                 }
465                         if (i > (int)rec->length)
466                                 {
467                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
468                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
469                                 return(0);
470                                 }
471                         for (j=(int)(l-i); j<(int)l; j++)
472                                 {
473                                 if (rec->data[j] != ii)
474                                         {
475                                         SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
476                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
477                                         return(0);
478                                         }
479                                 }
480                         rec->length-=i;
481                         }
482                 }
483         return(1);
484         }
485
486 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
487         {
488         unsigned int ret;
489         EVP_MD_CTX ctx;
490
491         EVP_MD_CTX_copy(&ctx,in_ctx);
492         EVP_DigestFinal(&ctx,out,&ret);
493         return((int)ret);
494         }
495
496 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
497              const char *str, int slen, unsigned char *out)
498         {
499         unsigned int i;
500         EVP_MD_CTX ctx;
501         unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
502         unsigned char *q,buf2[12];
503
504         q=buf;
505         memcpy(q,str,slen);
506         q+=slen;
507
508         EVP_MD_CTX_copy(&ctx,in1_ctx);
509         EVP_DigestFinal(&ctx,q,&i);
510         q+=i;
511         EVP_MD_CTX_copy(&ctx,in2_ctx);
512         EVP_DigestFinal(&ctx,q,&i);
513         q+=i;
514
515         tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
516                 s->session->master_key,s->session->master_key_length,
517                 out,buf2,12);
518         memset(&ctx,0,sizeof(EVP_MD_CTX));
519
520         return((int)12);
521         }
522
523 int tls1_mac(SSL *ssl, unsigned char *md, int send)
524         {
525         SSL3_RECORD *rec;
526         unsigned char *mac_sec,*seq;
527         const EVP_MD *hash;
528         unsigned int md_size;
529         int i;
530         HMAC_CTX hmac;
531         unsigned char buf[5]; 
532
533         if (send)
534                 {
535                 rec= &(ssl->s3->wrec);
536                 mac_sec= &(ssl->s3->write_mac_secret[0]);
537                 seq= &(ssl->s3->write_sequence[0]);
538                 hash=ssl->write_hash;
539                 }
540         else
541                 {
542                 rec= &(ssl->s3->rrec);
543                 mac_sec= &(ssl->s3->read_mac_secret[0]);
544                 seq= &(ssl->s3->read_sequence[0]);
545                 hash=ssl->read_hash;
546                 }
547
548         md_size=EVP_MD_size(hash);
549
550         buf[0]=rec->type;
551         buf[1]=TLS1_VERSION_MAJOR;
552         buf[2]=TLS1_VERSION_MINOR;
553         buf[3]=rec->length>>8;
554         buf[4]=rec->length&0xff;
555
556         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
557         HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
558         HMAC_Update(&hmac,seq,8);
559         HMAC_Update(&hmac,buf,5);
560         HMAC_Update(&hmac,rec->input,rec->length);
561         HMAC_Final(&hmac,md,&md_size);
562
563 #ifdef TLS_DEBUG
564 printf("sec=");
565 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
566 printf("seq=");
567 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
568 printf("buf=");
569 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
570 printf("rec=");
571 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
572 #endif
573
574         for (i=7; i>=0; i--)
575                 if (++seq[i]) break; 
576
577 #ifdef TLS_DEBUG
578 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
579 #endif
580         return(md_size);
581         }
582
583 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
584              int len)
585         {
586         unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
587         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
588
589         /* Setup the stuff to munge */
590         memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
591                 TLS_MD_MASTER_SECRET_CONST_SIZE);
592         memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
593                 s->s3->client_random,SSL3_RANDOM_SIZE);
594         memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
595                 s->s3->server_random,SSL3_RANDOM_SIZE);
596         tls1_PRF(s->ctx->md5,s->ctx->sha1,
597                 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
598                 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
599         return(SSL3_MASTER_SECRET_SIZE);
600         }
601
602 int tls1_alert_code(int code)
603         {
604         switch (code)
605                 {
606         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
607         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
608         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
609         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
610         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
611         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
612         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
613         case SSL_AD_NO_CERTIFICATE:     return(-1);
614         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
615         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
616         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
617         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
618         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
619         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
620         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
621         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
622         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
623         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
624         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
625         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
626         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
627         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
628         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
629         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
630         default:                        return(-1);
631                 }
632         }
633