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Plug a memory leak. Spotted by "Shijin" <shijin@comex.com>
[thirdparty/openssl.git] / ssl / t1_enc.c
CommitLineData
58964a49
RE		 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>
ec577822 60#include <openssl/comp.h>
d02f751c
UM		 61#include <openssl/md5.h>
62#include <openssl/sha.h>
ec577822
BM		 63#include <openssl/evp.h>
64#include <openssl/hmac.h>
58964a49
RE		 65#include "ssl_locl.h"
66
61f5b6f3
BL		 67static 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)
58964a49
RE		 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
e4aac1cb 111static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
61f5b6f3
BL		 112 unsigned char *label, int label_len,
113 const unsigned char *sec, int slen, unsigned char *out1,
114 unsigned char *out2, int olen)
58964a49
RE		 115 {
116 int len,i;
61f5b6f3 117 const unsigned char *S1,*S2;
58964a49
RE		 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
6b691a5c
UM		 132static void tls1_generate_key_block(SSL *s, unsigned char *km,
133 unsigned char *tmp, int num)
58964a49
RE		 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
dfeab068 148 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
e4aac1cb
BL		 149 s->session->master_key,s->session->master_key_length,
150 km,tmp,num);
f9b3bff6
RL		 151#ifdef KSSL_DEBUG
152 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
153 s->session->master_key_length);
154 {
155 int i;
156 for (i=0; i < s->session->master_key_length; i++)
157 {
158 printf("%02X", s->session->master_key[i]);
159 }
160 printf("\n"); }
161#endif /* KSSL_DEBUG */
58964a49
RE		 162 }
163
6b691a5c 164int tls1_change_cipher_state(SSL *s, int which)
58964a49 165 {
61f5b6f3 166 static const unsigned char empty[]="";
58964a49
RE		 167 unsigned char *p,*key_block,*mac_secret;
168 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
169 SSL3_RANDOM_SIZE*2];
170 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
171 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
172 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
173 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
174 unsigned char *ms,*key,*iv,*er1,*er2;
175 int client_write;
176 EVP_CIPHER_CTX *dd;
e778802f
BL		 177 const EVP_CIPHER *c;
178 const SSL_COMP *comp;
179 const EVP_MD *m;
06ab81f9 180 int _exp,n,i,j,k,exp_label_len,cl;
58964a49 181
06ab81f9 182 _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
58964a49
RE		 183 c=s->s3->tmp.new_sym_enc;
184 m=s->s3->tmp.new_hash;
185 comp=s->s3->tmp.new_compression;
186 key_block=s->s3->tmp.key_block;
187
f9b3bff6
RL		 188#ifdef KSSL_DEBUG
189 printf("tls1_change_cipher_state(which= %d) w/\n", which);
190 printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms,
191 comp);
192 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
193 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
194 c->nid,c->block_size,c->key_len,c->iv_len);
195 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
196 {
197 int i;
198 for (i=0; i<s->s3->tmp.key_block_length; i++)
199 printf("%02x", key_block[i]); printf("\n");
200 }
201#endif /* KSSL_DEBUG */
202
58964a49
RE		 203 if (which & SSL3_CC_READ)
204 {
205 if ((s->enc_read_ctx == NULL) &&
206 ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
26a3a48d 207 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
58964a49
RE		 208 goto err;
209 dd= s->enc_read_ctx;
210 s->read_hash=m;
dfeab068
RE		 211 if (s->expand != NULL)
212 {
213 COMP_CTX_free(s->expand);
214 s->expand=NULL;
215 }
216 if (comp != NULL)
217 {
413c4f45 218 s->expand=COMP_CTX_new(comp->method);
dfeab068
RE		 219 if (s->expand == NULL)
220 {
221 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
222 goto err2;
223 }
413c4f45
MC		 224 if (s->s3->rrec.comp == NULL)
225 s->s3->rrec.comp=(unsigned char *)
26a3a48d 226 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
dfeab068
RE		 227 if (s->s3->rrec.comp == NULL)
228 goto err;
229 }
58964a49
RE		 230 memset(&(s->s3->read_sequence[0]),0,8);
231 mac_secret= &(s->s3->read_mac_secret[0]);
232 }
233 else
234 {
235 if ((s->enc_write_ctx == NULL) &&
236 ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
26a3a48d 237 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
58964a49
RE		 238 goto err;
239 dd= s->enc_write_ctx;
240 s->write_hash=m;
dfeab068
RE		 241 if (s->compress != NULL)
242 {
243 COMP_CTX_free(s->compress);
244 s->compress=NULL;
245 }
246 if (comp != NULL)
247 {
413c4f45 248 s->compress=COMP_CTX_new(comp->method);
dfeab068
RE		 249 if (s->compress == NULL)
250 {
251 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
252 goto err2;
253 }
254 }
58964a49
RE		 255 memset(&(s->s3->write_sequence[0]),0,8);
256 mac_secret= &(s->s3->write_mac_secret[0]);
257 }
258
259 EVP_CIPHER_CTX_init(dd);
260
261 p=s->s3->tmp.key_block;
262 i=EVP_MD_size(m);
436d318c 263 cl=EVP_CIPHER_key_length(c);
06ab81f9
BL		 264 j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
265 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
436d318c 266 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
58964a49
RE		 267 k=EVP_CIPHER_iv_length(c);
268 er1= &(s->s3->client_random[0]);
269 er2= &(s->s3->server_random[0]);
270 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
271 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
272 {
273 ms= &(p[ 0]); n=i+i;
274 key= &(p[ n]); n+=j+j;
275 iv= &(p[ n]); n+=k+k;
276 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
277 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
278 client_write=1;
279 }
280 else
281 {
282 n=i;
283 ms= &(p[ n]); n+=i+j;
284 key= &(p[ n]); n+=j+k;
285 iv= &(p[ n]); n+=k;
286 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
287 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
288 client_write=0;
289 }
290
291 if (n > s->s3->tmp.key_block_length)
292 {
5277d7cb 293 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
58964a49
RE		 294 goto err2;
295 }
296
297 memcpy(mac_secret,ms,i);
298#ifdef TLS_DEBUG
299printf("which = %04X\nmac key=",which);
300{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
301#endif
06ab81f9 302 if (_exp)
58964a49
RE		 303 {
304 /* In here I set both the read and write key/iv to the
305 * same value since only the correct one will be used :-).
306 */
307 p=buf;
308 memcpy(p,exp_label,exp_label_len);
309 p+=exp_label_len;
310 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
311 p+=SSL3_RANDOM_SIZE;
312 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
313 p+=SSL3_RANDOM_SIZE;
dfeab068 314 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
06ab81f9 315 tmp1,tmp2,EVP_CIPHER_key_length(c));
58964a49
RE		 316 key=tmp1;
317
318 if (k > 0)
319 {
320 p=buf;
321 memcpy(p,TLS_MD_IV_BLOCK_CONST,
322 TLS_MD_IV_BLOCK_CONST_SIZE);
323 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
324 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
325 p+=SSL3_RANDOM_SIZE;
326 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
327 p+=SSL3_RANDOM_SIZE;
61f5b6f3
BL		 328 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
329 iv1,iv2,k*2);
58964a49
RE		 330 if (client_write)
331 iv=iv1;
332 else
333 iv= &(iv1[k]);
334 }
335 }
336
337 s->session->key_arg_length=0;
f9b3bff6
RL		 338#ifdef KSSL_DEBUG
339 {
340 int i;
341 printf("EVP_CipherInit(dd,c,key=,iv=,which)\n");
342 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
343 printf("\n");
344 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
345 printf("\n");
346 }
347#endif /* KSSL_DEBUG */
58964a49
RE		 348
349 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
350#ifdef TLS_DEBUG
351printf("which = %04X\nkey=",which);
352{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
353printf("\niv=");
354{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
355printf("\n");
356#endif
357
358 memset(tmp1,0,sizeof(tmp1));
359 memset(tmp2,0,sizeof(tmp1));
360 memset(iv1,0,sizeof(iv1));
361 memset(iv2,0,sizeof(iv2));
362 return(1);
363err:
364 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
365err2:
366 return(0);
367 }
368
6b691a5c 369int tls1_setup_key_block(SSL *s)
58964a49
RE		 370 {
371 unsigned char *p1,*p2;
e778802f
BL		 372 const EVP_CIPHER *c;
373 const EVP_MD *hash;
06ab81f9 374 int num;
413c4f45 375 SSL_COMP *comp;
58964a49 376
f9b3bff6
RL		 377#ifdef KSSL_DEBUG
378 printf ("tls1_setup_key_block()\n");
379#endif /* KSSL_DEBUG */
380
58964a49
RE		 381 if (s->s3->tmp.key_block_length != 0)
382 return(1);
383
413c4f45 384 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
58964a49
RE		 385 {
386 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
387 return(0);
388 }
389
390 s->s3->tmp.new_sym_enc=c;
391 s->s3->tmp.new_hash=hash;
392
58964a49
RE		 393 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
394 num*=2;
395
396 ssl3_cleanup_key_block(s);
397
26a3a48d 398 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
58964a49 399 goto err;
26a3a48d 400 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
58964a49
RE		 401 goto err;
402
403 s->s3->tmp.key_block_length=num;
404 s->s3->tmp.key_block=p1;
405
406
407#ifdef TLS_DEBUG
408printf("client random\n");
409{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
410printf("server random\n");
411{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
412printf("pre-master\n");
413{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
414#endif
415 tls1_generate_key_block(s,p1,p2,num);
416 memset(p2,0,num);
26a3a48d 417 OPENSSL_free(p2);
58964a49
RE		 418#ifdef TLS_DEBUG
419printf("\nkey block\n");
420{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
421#endif
422
423 return(1);
424err:
425 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
426 return(0);
427 }
428
6b691a5c 429int tls1_enc(SSL *s, int send)
58964a49
RE		 430 {
431 SSL3_RECORD *rec;
432 EVP_CIPHER_CTX *ds;
433 unsigned long l;
434 int bs,i,ii,j,k,n=0;
e778802f 435 const EVP_CIPHER *enc;
58964a49
RE		 436
437 if (send)
438 {
439 if (s->write_hash != NULL)
440 n=EVP_MD_size(s->write_hash);
441 ds=s->enc_write_ctx;
442 rec= &(s->s3->wrec);
443 if (s->enc_write_ctx == NULL)
dfeab068 444 enc=NULL;
58964a49 445 else
58964a49 446 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
58964a49
RE		 447 }
448 else
449 {
450 if (s->read_hash != NULL)
451 n=EVP_MD_size(s->read_hash);
452 ds=s->enc_read_ctx;
453 rec= &(s->s3->rrec);
454 if (s->enc_read_ctx == NULL)
dfeab068 455 enc=NULL;
58964a49 456 else
58964a49 457 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
58964a49
RE		 458 }
459
f9b3bff6
RL		 460#ifdef KSSL_DEBUG
461 printf("tls1_enc(%d)\n", send);
462#endif /* KSSL_DEBUG */
463
58964a49 464 if ((s->session == NULL) || (ds == NULL) ||
dfeab068 465 (enc == NULL))
58964a49
RE		 466 {
467 memcpy(rec->data,rec->input,rec->length);
468 rec->input=rec->data;
469 }
470 else
471 {
472 l=rec->length;
473 bs=EVP_CIPHER_block_size(ds->cipher);
474
475 if ((bs != 1) && send)
476 {
477 i=bs-((int)l%bs);
478
479 /* Add weird padding of upto 256 bytes */
480
481 /* we need to add 'i' padding bytes of value j */
482 j=i-1;
483 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
484 {
485 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
486 j++;
487 }
488 for (k=(int)l; k<(int)(l+i); k++)
489 rec->input[k]=j;
490 l+=i;
491 rec->length+=i;
492 }
493
f9b3bff6
RL		 494#ifdef KSSL_DEBUG
495 {
496 unsigned long i;
497 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
498 ds,rec->data,rec->input,l);
499 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
500 ds->buf_len, ds->cipher->key_len,
501 DES_KEY_SZ, DES_SCHEDULE_SZ,
502 ds->cipher->iv_len);
503 printf("\t\tIV: ");
504 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
505 printf("\n");
506 printf("\trec->input=");
507 for (i=0; i<l; i++) printf(" %02x", rec->input[i]);
508 printf("\n");
509 }
510#endif /* KSSL_DEBUG */
511
58964a49
RE		 512 EVP_Cipher(ds,rec->data,rec->input,l);
513
f9b3bff6
RL		 514#ifdef KSSL_DEBUG
515 {
516 unsigned long i;
517 printf("\trec->data=");
518 for (i=0; i<l; i++)
519 printf(" %02x", rec->data[i]); printf("\n");
520 }
521#endif /* KSSL_DEBUG */
522
58964a49
RE		 523 if ((bs != 1) && !send)
524 {
525 ii=i=rec->data[l-1];
526 i++;
527 if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
528 {
529 /* First packet is even in size, so check */
530 if ((memcmp(s->s3->read_sequence,
531 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
532 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
533 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
534 i--;
535 }
536 if (i > (int)rec->length)
537 {
538 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
539 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
540 return(0);
541 }
542 for (j=(int)(l-i); j<(int)l; j++)
543 {
544 if (rec->data[j] != ii)
545 {
546 SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
547 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
548 return(0);
549 }
550 }
551 rec->length-=i;
552 }
553 }
554 return(1);
555 }
556
6b691a5c 557int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
58964a49
RE		 558 {
559 unsigned int ret;
560 EVP_MD_CTX ctx;
561
413c4f45 562 EVP_MD_CTX_copy(&ctx,in_ctx);
58964a49
RE		 563 EVP_DigestFinal(&ctx,out,&ret);
564 return((int)ret);
565 }
566
6b691a5c 567int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
245206ea 568 const char *str, int slen, unsigned char *out)
58964a49
RE		 569 {
570 unsigned int i;
571 EVP_MD_CTX ctx;
572 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
573 unsigned char *q,buf2[12];
574
575 q=buf;
576 memcpy(q,str,slen);
577 q+=slen;
578
413c4f45 579 EVP_MD_CTX_copy(&ctx,in1_ctx);
58964a49
RE		 580 EVP_DigestFinal(&ctx,q,&i);
581 q+=i;
413c4f45 582 EVP_MD_CTX_copy(&ctx,in2_ctx);
58964a49
RE		 583 EVP_DigestFinal(&ctx,q,&i);
584 q+=i;
585
dfeab068 586 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
58964a49
RE		 587 s->session->master_key,s->session->master_key_length,
588 out,buf2,12);
589 memset(&ctx,0,sizeof(EVP_MD_CTX));
590
591 return((int)12);
592 }
593
6b691a5c 594int tls1_mac(SSL *ssl, unsigned char *md, int send)
58964a49
RE		 595 {
596 SSL3_RECORD *rec;
597 unsigned char *mac_sec,*seq;
e778802f 598 const EVP_MD *hash;
58964a49
RE		 599 unsigned int md_size;
600 int i;
601 HMAC_CTX hmac;
602 unsigned char buf[5];
603
604 if (send)
605 {
606 rec= &(ssl->s3->wrec);
607 mac_sec= &(ssl->s3->write_mac_secret[0]);
608 seq= &(ssl->s3->write_sequence[0]);
609 hash=ssl->write_hash;
610 }
611 else
612 {
613 rec= &(ssl->s3->rrec);
614 mac_sec= &(ssl->s3->read_mac_secret[0]);
615 seq= &(ssl->s3->read_sequence[0]);
616 hash=ssl->read_hash;
617 }
618
619 md_size=EVP_MD_size(hash);
620
621 buf[0]=rec->type;
622 buf[1]=TLS1_VERSION_MAJOR;
623 buf[2]=TLS1_VERSION_MINOR;
624 buf[3]=rec->length>>8;
625 buf[4]=rec->length&0xff;
626
627 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
628 HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
629 HMAC_Update(&hmac,seq,8);
630 HMAC_Update(&hmac,buf,5);
631 HMAC_Update(&hmac,rec->input,rec->length);
632 HMAC_Final(&hmac,md,&md_size);
633
634#ifdef TLS_DEBUG
635printf("sec=");
dfeab068 636{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
58964a49
RE		 637printf("seq=");
638{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
639printf("buf=");
640{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
641printf("rec=");
dfeab068 642{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
58964a49
RE		 643#endif
644
645 for (i=7; i>=0; i--)
646 if (++seq[i]) break;
647
648#ifdef TLS_DEBUG
dfeab068 649{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
58964a49
RE		 650#endif
651 return(md_size);
652 }
653
6b691a5c
UM		 654int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
655 int len)
58964a49
RE		 656 {
657 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
658 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
659
f9b3bff6
RL		 660#ifdef KSSL_DEBUG
661 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
662#endif /* KSSL_DEBUG */
663
58964a49
RE		 664 /* Setup the stuff to munge */
665 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
666 TLS_MD_MASTER_SECRET_CONST_SIZE);
667 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
668 s->s3->client_random,SSL3_RANDOM_SIZE);
669 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
670 s->s3->server_random,SSL3_RANDOM_SIZE);
671 tls1_PRF(s->ctx->md5,s->ctx->sha1,
672 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
673 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
f9b3bff6
RL		 674#ifdef KSSL_DEBUG
675 printf ("tls1_generate_master_secret() complete\n");
676#endif /* KSSL_DEBUG */
58964a49
RE		 677 return(SSL3_MASTER_SECRET_SIZE);
678 }
679
6b691a5c 680int tls1_alert_code(int code)
58964a49
RE		 681 {
682 switch (code)
683 {
684 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
685 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
686 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
687 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
688 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
689 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
690 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
691 case SSL_AD_NO_CERTIFICATE: return(-1);
692 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
693 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
694 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
695 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
696 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
697 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
698 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
699 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
700 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
701 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
657e60fa 702 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
58964a49
RE		 703 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
704 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
705 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
657e60fa 706 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
58964a49
RE		 707 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
708 default: return(-1);
709 }
710 }
711
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