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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 "evp.h" | |
61 | #include "hmac.h" | |
62 | #include "ssl_locl.h" | |
63 | ||
64 | static void tls1_P_hash(md,sec,sec_len,seed,seed_len,out,olen) | |
65 | EVP_MD *md; | |
66 | unsigned char *sec; | |
67 | int sec_len; | |
68 | unsigned char *seed; | |
69 | int seed_len; | |
70 | unsigned char *out; | |
71 | int olen; | |
72 | { | |
73 | int chunk,n; | |
74 | unsigned int j; | |
75 | HMAC_CTX ctx; | |
76 | HMAC_CTX ctx_tmp; | |
77 | unsigned char A1[HMAC_MAX_MD_CBLOCK]; | |
78 | unsigned int A1_len; | |
79 | ||
80 | chunk=EVP_MD_size(md); | |
81 | ||
82 | HMAC_Init(&ctx,sec,sec_len,md); | |
83 | HMAC_Update(&ctx,seed,seed_len); | |
84 | HMAC_Final(&ctx,A1,&A1_len); | |
85 | ||
86 | n=0; | |
87 | for (;;) | |
88 | { | |
89 | HMAC_Init(&ctx,NULL,0,NULL); /* re-init */ | |
90 | HMAC_Update(&ctx,A1,A1_len); | |
91 | memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */ | |
92 | HMAC_Update(&ctx,seed,seed_len); | |
93 | ||
94 | if (olen > chunk) | |
95 | { | |
96 | HMAC_Final(&ctx,out,&j); | |
97 | out+=j; | |
98 | olen-=j; | |
99 | HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ | |
100 | } | |
101 | else /* last one */ | |
102 | { | |
103 | HMAC_Final(&ctx,A1,&A1_len); | |
104 | memcpy(out,A1,olen); | |
105 | break; | |
106 | } | |
107 | } | |
108 | HMAC_cleanup(&ctx); | |
109 | HMAC_cleanup(&ctx_tmp); | |
110 | memset(A1,0,sizeof(A1)); | |
111 | } | |
112 | ||
113 | static void tls1_PRF(md5,sha1,label,label_len,sec,slen,out1,out2,olen) | |
114 | EVP_MD *md5; | |
115 | EVP_MD *sha1; | |
116 | unsigned char *label; | |
117 | int label_len; | |
118 | unsigned char *sec; | |
119 | int slen; | |
120 | unsigned char *out1; | |
121 | unsigned char *out2; | |
122 | int olen; | |
123 | { | |
124 | int len,i; | |
125 | unsigned char *S1,*S2; | |
126 | ||
127 | len=slen/2; | |
128 | S1=sec; | |
129 | S2= &(sec[len]); | |
130 | len+=(slen&1); /* add for odd, make longer */ | |
131 | ||
132 | ||
133 | tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); | |
134 | tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); | |
135 | ||
136 | for (i=0; i<olen; i++) | |
137 | out1[i]^=out2[i]; | |
138 | } | |
139 | ||
140 | static void tls1_generate_key_block(s,km,tmp,num) | |
141 | SSL *s; | |
142 | unsigned char *km,*tmp; | |
143 | int num; | |
144 | { | |
145 | unsigned char *p; | |
146 | unsigned char buf[SSL3_RANDOM_SIZE*2+ | |
147 | TLS_MD_MAX_CONST_SIZE]; | |
148 | p=buf; | |
149 | ||
150 | memcpy(p,TLS_MD_KEY_EXPANSION_CONST, | |
151 | TLS_MD_KEY_EXPANSION_CONST_SIZE); | |
152 | p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; | |
153 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
154 | p+=SSL3_RANDOM_SIZE; | |
155 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
156 | p+=SSL3_RANDOM_SIZE; | |
157 | ||
158 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf, | |
159 | s->session->master_key,s->session->master_key_length, | |
160 | km,tmp,num); | |
161 | } | |
162 | ||
163 | int tls1_change_cipher_state(s,which) | |
164 | SSL *s; | |
165 | int which; | |
166 | { | |
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; | |
177 | EVP_CIPHER *c; | |
178 | SSL_COMPRESSION *comp; | |
179 | EVP_MD *m; | |
180 | int exp,n,i,j,k,exp_label_len; | |
181 | ||
182 | exp=(s->s3->tmp.new_cipher->algorithms & SSL_EXPORT)?1:0; | |
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 | ||
188 | if (which & SSL3_CC_READ) | |
189 | { | |
190 | if ((s->enc_read_ctx == NULL) && | |
191 | ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
192 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
193 | goto err; | |
194 | dd= s->enc_read_ctx; | |
195 | s->read_hash=m; | |
196 | s->read_compression=comp; | |
197 | memset(&(s->s3->read_sequence[0]),0,8); | |
198 | mac_secret= &(s->s3->read_mac_secret[0]); | |
199 | } | |
200 | else | |
201 | { | |
202 | if ((s->enc_write_ctx == NULL) && | |
203 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
204 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
205 | goto err; | |
206 | dd= s->enc_write_ctx; | |
207 | s->write_hash=m; | |
208 | s->write_compression=comp; | |
209 | memset(&(s->s3->write_sequence[0]),0,8); | |
210 | mac_secret= &(s->s3->write_mac_secret[0]); | |
211 | } | |
212 | ||
213 | EVP_CIPHER_CTX_init(dd); | |
214 | ||
215 | p=s->s3->tmp.key_block; | |
216 | i=EVP_MD_size(m); | |
217 | j=(exp)?5:EVP_CIPHER_key_length(c); | |
218 | k=EVP_CIPHER_iv_length(c); | |
219 | er1= &(s->s3->client_random[0]); | |
220 | er2= &(s->s3->server_random[0]); | |
221 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
222 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
223 | { | |
224 | ms= &(p[ 0]); n=i+i; | |
225 | key= &(p[ n]); n+=j+j; | |
226 | iv= &(p[ n]); n+=k+k; | |
227 | exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; | |
228 | exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; | |
229 | client_write=1; | |
230 | } | |
231 | else | |
232 | { | |
233 | n=i; | |
234 | ms= &(p[ n]); n+=i+j; | |
235 | key= &(p[ n]); n+=j+k; | |
236 | iv= &(p[ n]); n+=k; | |
237 | exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; | |
238 | exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; | |
239 | client_write=0; | |
240 | } | |
241 | ||
242 | if (n > s->s3->tmp.key_block_length) | |
243 | { | |
244 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR); | |
245 | goto err2; | |
246 | } | |
247 | ||
248 | memcpy(mac_secret,ms,i); | |
249 | #ifdef TLS_DEBUG | |
250 | printf("which = %04X\nmac key=",which); | |
251 | { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } | |
252 | #endif | |
253 | if (exp) | |
254 | { | |
255 | /* In here I set both the read and write key/iv to the | |
256 | * same value since only the correct one will be used :-). | |
257 | */ | |
258 | p=buf; | |
259 | memcpy(p,exp_label,exp_label_len); | |
260 | p+=exp_label_len; | |
261 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
262 | p+=SSL3_RANDOM_SIZE; | |
263 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
264 | p+=SSL3_RANDOM_SIZE; | |
265 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,key,j, | |
266 | tmp1,tmp2,EVP_CIPHER_key_length(c)); | |
267 | key=tmp1; | |
268 | ||
269 | if (k > 0) | |
270 | { | |
271 | p=buf; | |
272 | memcpy(p,TLS_MD_IV_BLOCK_CONST, | |
273 | TLS_MD_IV_BLOCK_CONST_SIZE); | |
274 | p+=TLS_MD_IV_BLOCK_CONST_SIZE; | |
275 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
276 | p+=SSL3_RANDOM_SIZE; | |
277 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
278 | p+=SSL3_RANDOM_SIZE; | |
279 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
280 | buf,p-buf,"",0,iv1,iv2,k*2); | |
281 | if (client_write) | |
282 | iv=iv1; | |
283 | else | |
284 | iv= &(iv1[k]); | |
285 | } | |
286 | } | |
287 | ||
288 | s->session->key_arg_length=0; | |
289 | ||
290 | EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); | |
291 | #ifdef TLS_DEBUG | |
292 | printf("which = %04X\nkey=",which); | |
293 | { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } | |
294 | printf("\niv="); | |
295 | { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } | |
296 | printf("\n"); | |
297 | #endif | |
298 | ||
299 | memset(tmp1,0,sizeof(tmp1)); | |
300 | memset(tmp2,0,sizeof(tmp1)); | |
301 | memset(iv1,0,sizeof(iv1)); | |
302 | memset(iv2,0,sizeof(iv2)); | |
303 | return(1); | |
304 | err: | |
305 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
306 | err2: | |
307 | return(0); | |
308 | } | |
309 | ||
310 | int tls1_setup_key_block(s) | |
311 | SSL *s; | |
312 | { | |
313 | unsigned char *p1,*p2; | |
314 | EVP_CIPHER *c; | |
315 | EVP_MD *hash; | |
316 | int num,exp; | |
317 | ||
318 | if (s->s3->tmp.key_block_length != 0) | |
319 | return(1); | |
320 | ||
321 | if (!ssl_cipher_get_evp(s->session->cipher,&c,&hash)) | |
322 | { | |
323 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
324 | return(0); | |
325 | } | |
326 | ||
327 | s->s3->tmp.new_sym_enc=c; | |
328 | s->s3->tmp.new_hash=hash; | |
329 | ||
330 | exp=(s->session->cipher->algorithms & SSL_EXPORT)?1:0; | |
331 | ||
332 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); | |
333 | num*=2; | |
334 | ||
335 | ssl3_cleanup_key_block(s); | |
336 | ||
337 | if ((p1=(unsigned char *)Malloc(num)) == NULL) | |
338 | goto err; | |
339 | if ((p2=(unsigned char *)Malloc(num)) == NULL) | |
340 | goto err; | |
341 | ||
342 | s->s3->tmp.key_block_length=num; | |
343 | s->s3->tmp.key_block=p1; | |
344 | ||
345 | ||
346 | #ifdef TLS_DEBUG | |
347 | printf("client random\n"); | |
348 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } | |
349 | printf("server random\n"); | |
350 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } | |
351 | printf("pre-master\n"); | |
352 | { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } | |
353 | #endif | |
354 | tls1_generate_key_block(s,p1,p2,num); | |
355 | memset(p2,0,num); | |
356 | Free(p2); | |
357 | #ifdef TLS_DEBUG | |
358 | printf("\nkey block\n"); | |
359 | { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } | |
360 | #endif | |
361 | ||
362 | return(1); | |
363 | err: | |
364 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
365 | return(0); | |
366 | } | |
367 | ||
368 | int tls1_enc(s,send) | |
369 | SSL *s; | |
370 | int send; | |
371 | { | |
372 | SSL3_RECORD *rec; | |
373 | EVP_CIPHER_CTX *ds; | |
374 | unsigned long l; | |
375 | int bs,i,ii,j,k,n=0; | |
376 | EVP_CIPHER *enc; | |
377 | SSL_COMPRESSION *comp; | |
378 | ||
379 | if (send) | |
380 | { | |
381 | if (s->write_hash != NULL) | |
382 | n=EVP_MD_size(s->write_hash); | |
383 | ds=s->enc_write_ctx; | |
384 | rec= &(s->s3->wrec); | |
385 | if (s->enc_write_ctx == NULL) | |
386 | { enc=NULL; comp=NULL; } | |
387 | else | |
388 | { | |
389 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); | |
390 | comp=s->write_compression; | |
391 | } | |
392 | } | |
393 | else | |
394 | { | |
395 | if (s->read_hash != NULL) | |
396 | n=EVP_MD_size(s->read_hash); | |
397 | ds=s->enc_read_ctx; | |
398 | rec= &(s->s3->rrec); | |
399 | if (s->enc_read_ctx == NULL) | |
400 | { enc=NULL; comp=NULL; } | |
401 | else | |
402 | { | |
403 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); | |
404 | comp=s->read_compression; | |
405 | } | |
406 | } | |
407 | ||
408 | if ((s->session == NULL) || (ds == NULL) || | |
409 | ((enc == NULL) && (comp == NULL))) | |
410 | { | |
411 | memcpy(rec->data,rec->input,rec->length); | |
412 | rec->input=rec->data; | |
413 | } | |
414 | else | |
415 | { | |
416 | l=rec->length; | |
417 | bs=EVP_CIPHER_block_size(ds->cipher); | |
418 | ||
419 | if ((bs != 1) && send) | |
420 | { | |
421 | i=bs-((int)l%bs); | |
422 | ||
423 | /* Add weird padding of upto 256 bytes */ | |
424 | ||
425 | /* we need to add 'i' padding bytes of value j */ | |
426 | j=i-1; | |
427 | if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) | |
428 | { | |
429 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
430 | j++; | |
431 | } | |
432 | for (k=(int)l; k<(int)(l+i); k++) | |
433 | rec->input[k]=j; | |
434 | l+=i; | |
435 | rec->length+=i; | |
436 | } | |
437 | ||
438 | EVP_Cipher(ds,rec->data,rec->input,l); | |
439 | ||
440 | if ((bs != 1) && !send) | |
441 | { | |
442 | ii=i=rec->data[l-1]; | |
443 | i++; | |
444 | if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) | |
445 | { | |
446 | /* First packet is even in size, so check */ | |
447 | if ((memcmp(s->s3->read_sequence, | |
448 | "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) | |
449 | s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; | |
450 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
451 | i--; | |
452 | } | |
453 | if (i > (int)rec->length) | |
454 | { | |
455 | SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
456 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
457 | return(0); | |
458 | } | |
459 | for (j=(int)(l-i); j<(int)l; j++) | |
460 | { | |
461 | if (rec->data[j] != ii) | |
462 | { | |
463 | SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED); | |
464 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
465 | return(0); | |
466 | } | |
467 | } | |
468 | rec->length-=i; | |
469 | } | |
470 | } | |
471 | return(1); | |
472 | } | |
473 | ||
474 | int tls1_cert_verify_mac(s,in_ctx,out) | |
475 | SSL *s; | |
476 | EVP_MD_CTX *in_ctx; | |
477 | unsigned char *out; | |
478 | { | |
479 | unsigned int ret; | |
480 | EVP_MD_CTX ctx; | |
481 | ||
482 | memcpy(&ctx,in_ctx,sizeof(EVP_MD_CTX)); | |
483 | EVP_DigestFinal(&ctx,out,&ret); | |
484 | return((int)ret); | |
485 | } | |
486 | ||
487 | int tls1_final_finish_mac(s,in1_ctx,in2_ctx,str,slen,out) | |
488 | SSL *s; | |
489 | EVP_MD_CTX *in1_ctx,*in2_ctx; | |
490 | unsigned char *str; | |
491 | int slen; | |
492 | unsigned char *out; | |
493 | { | |
494 | unsigned int i; | |
495 | EVP_MD_CTX ctx; | |
496 | unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
497 | unsigned char *q,buf2[12]; | |
498 | ||
499 | q=buf; | |
500 | memcpy(q,str,slen); | |
501 | q+=slen; | |
502 | ||
503 | memcpy(&ctx,in1_ctx,sizeof(EVP_MD_CTX)); | |
504 | EVP_DigestFinal(&ctx,q,&i); | |
505 | q+=i; | |
506 | memcpy(&ctx,in2_ctx,sizeof(EVP_MD_CTX)); | |
507 | EVP_DigestFinal(&ctx,q,&i); | |
508 | q+=i; | |
509 | ||
510 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,q-buf, | |
511 | s->session->master_key,s->session->master_key_length, | |
512 | out,buf2,12); | |
513 | memset(&ctx,0,sizeof(EVP_MD_CTX)); | |
514 | ||
515 | return((int)12); | |
516 | } | |
517 | ||
518 | int tls1_mac(ssl,md,send) | |
519 | SSL *ssl; | |
520 | unsigned char *md; | |
521 | int send; | |
522 | { | |
523 | SSL3_RECORD *rec; | |
524 | unsigned char *mac_sec,*seq; | |
525 | EVP_MD *hash; | |
526 | unsigned int md_size; | |
527 | int i; | |
528 | HMAC_CTX hmac; | |
529 | unsigned char buf[5]; | |
530 | ||
531 | if (send) | |
532 | { | |
533 | rec= &(ssl->s3->wrec); | |
534 | mac_sec= &(ssl->s3->write_mac_secret[0]); | |
535 | seq= &(ssl->s3->write_sequence[0]); | |
536 | hash=ssl->write_hash; | |
537 | } | |
538 | else | |
539 | { | |
540 | rec= &(ssl->s3->rrec); | |
541 | mac_sec= &(ssl->s3->read_mac_secret[0]); | |
542 | seq= &(ssl->s3->read_sequence[0]); | |
543 | hash=ssl->read_hash; | |
544 | } | |
545 | ||
546 | md_size=EVP_MD_size(hash); | |
547 | ||
548 | buf[0]=rec->type; | |
549 | buf[1]=TLS1_VERSION_MAJOR; | |
550 | buf[2]=TLS1_VERSION_MINOR; | |
551 | buf[3]=rec->length>>8; | |
552 | buf[4]=rec->length&0xff; | |
553 | ||
554 | /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ | |
555 | HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash); | |
556 | HMAC_Update(&hmac,seq,8); | |
557 | HMAC_Update(&hmac,buf,5); | |
558 | HMAC_Update(&hmac,rec->input,rec->length); | |
559 | HMAC_Final(&hmac,md,&md_size); | |
560 | ||
561 | #ifdef TLS_DEBUG | |
562 | printf("sec="); | |
563 | {int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } | |
564 | printf("seq="); | |
565 | {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } | |
566 | printf("buf="); | |
567 | {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } | |
568 | printf("rec="); | |
569 | {int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } | |
570 | #endif | |
571 | ||
572 | for (i=7; i>=0; i--) | |
573 | if (++seq[i]) break; | |
574 | ||
575 | #ifdef TLS_DEBUG | |
576 | {int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } | |
577 | #endif | |
578 | return(md_size); | |
579 | } | |
580 | ||
581 | int tls1_generate_master_secret(s,out,p,len) | |
582 | SSL *s; | |
583 | unsigned char *out; | |
584 | unsigned char *p; | |
585 | int len; | |
586 | { | |
587 | unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; | |
588 | unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; | |
589 | ||
590 | /* Setup the stuff to munge */ | |
591 | memcpy(buf,TLS_MD_MASTER_SECRET_CONST, | |
592 | TLS_MD_MASTER_SECRET_CONST_SIZE); | |
593 | memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
594 | s->s3->client_random,SSL3_RANDOM_SIZE); | |
595 | memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
596 | s->s3->server_random,SSL3_RANDOM_SIZE); | |
597 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
598 | buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, | |
599 | s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE); | |
600 | return(SSL3_MASTER_SECRET_SIZE); | |
601 | } | |
602 | ||
603 | int tls1_alert_code(code) | |
604 | int code; | |
605 | { | |
606 | switch (code) | |
607 | { | |
608 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
609 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
610 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
611 | case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); | |
612 | case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); | |
613 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
614 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
615 | case SSL_AD_NO_CERTIFICATE: return(-1); | |
616 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
617 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
618 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
619 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
620 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
621 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
622 | case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); | |
623 | case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); | |
624 | case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); | |
625 | case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); | |
626 | case SSL_AD_EXPORT_RESTRICION: return(TLS1_AD_EXPORT_RESTRICION); | |
627 | case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); | |
628 | case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); | |
629 | case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); | |
630 | case SSL_AD_USER_CANCLED: return(TLS1_AD_USER_CANCLED); | |
631 | case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); | |
632 | default: return(-1); | |
633 | } | |
634 | } | |
635 |