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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> | |
413c4f45 | 60 | #include "comp.h" |
58964a49 RE |
61 | #include "evp.h" |
62 | #include "hmac.h" | |
63 | #include "ssl_locl.h" | |
64 | ||
65 | static void tls1_P_hash(md,sec,sec_len,seed,seed_len,out,olen) | |
66 | EVP_MD *md; | |
67 | unsigned char *sec; | |
68 | int sec_len; | |
69 | unsigned char *seed; | |
70 | int seed_len; | |
71 | unsigned char *out; | |
72 | int olen; | |
73 | { | |
74 | int chunk,n; | |
75 | unsigned int j; | |
76 | HMAC_CTX ctx; | |
77 | HMAC_CTX ctx_tmp; | |
78 | unsigned char A1[HMAC_MAX_MD_CBLOCK]; | |
79 | unsigned int A1_len; | |
80 | ||
81 | chunk=EVP_MD_size(md); | |
82 | ||
83 | HMAC_Init(&ctx,sec,sec_len,md); | |
84 | HMAC_Update(&ctx,seed,seed_len); | |
85 | HMAC_Final(&ctx,A1,&A1_len); | |
86 | ||
87 | n=0; | |
88 | for (;;) | |
89 | { | |
90 | HMAC_Init(&ctx,NULL,0,NULL); /* re-init */ | |
91 | HMAC_Update(&ctx,A1,A1_len); | |
92 | memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */ | |
93 | HMAC_Update(&ctx,seed,seed_len); | |
94 | ||
95 | if (olen > chunk) | |
96 | { | |
97 | HMAC_Final(&ctx,out,&j); | |
98 | out+=j; | |
99 | olen-=j; | |
100 | HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ | |
101 | } | |
102 | else /* last one */ | |
103 | { | |
104 | HMAC_Final(&ctx,A1,&A1_len); | |
105 | memcpy(out,A1,olen); | |
106 | break; | |
107 | } | |
108 | } | |
109 | HMAC_cleanup(&ctx); | |
110 | HMAC_cleanup(&ctx_tmp); | |
111 | memset(A1,0,sizeof(A1)); | |
112 | } | |
113 | ||
114 | static void tls1_PRF(md5,sha1,label,label_len,sec,slen,out1,out2,olen) | |
115 | EVP_MD *md5; | |
116 | EVP_MD *sha1; | |
117 | unsigned char *label; | |
118 | int label_len; | |
119 | unsigned char *sec; | |
120 | int slen; | |
121 | unsigned char *out1; | |
122 | unsigned char *out2; | |
123 | int olen; | |
124 | { | |
125 | int len,i; | |
126 | unsigned char *S1,*S2; | |
127 | ||
128 | len=slen/2; | |
129 | S1=sec; | |
130 | S2= &(sec[len]); | |
131 | len+=(slen&1); /* add for odd, make longer */ | |
132 | ||
133 | ||
134 | tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); | |
135 | tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); | |
136 | ||
137 | for (i=0; i<olen; i++) | |
138 | out1[i]^=out2[i]; | |
139 | } | |
140 | ||
141 | static void tls1_generate_key_block(s,km,tmp,num) | |
142 | SSL *s; | |
143 | unsigned char *km,*tmp; | |
144 | int num; | |
145 | { | |
146 | unsigned char *p; | |
147 | unsigned char buf[SSL3_RANDOM_SIZE*2+ | |
148 | TLS_MD_MAX_CONST_SIZE]; | |
149 | p=buf; | |
150 | ||
151 | memcpy(p,TLS_MD_KEY_EXPANSION_CONST, | |
152 | TLS_MD_KEY_EXPANSION_CONST_SIZE); | |
153 | p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; | |
154 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
155 | p+=SSL3_RANDOM_SIZE; | |
156 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
157 | p+=SSL3_RANDOM_SIZE; | |
158 | ||
dfeab068 | 159 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), |
58964a49 RE |
160 | s->session->master_key,s->session->master_key_length, |
161 | km,tmp,num); | |
162 | } | |
163 | ||
164 | int tls1_change_cipher_state(s,which) | |
165 | SSL *s; | |
166 | int which; | |
167 | { | |
168 | unsigned char *p,*key_block,*mac_secret; | |
169 | unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ | |
170 | SSL3_RANDOM_SIZE*2]; | |
171 | unsigned char tmp1[EVP_MAX_KEY_LENGTH]; | |
172 | unsigned char tmp2[EVP_MAX_KEY_LENGTH]; | |
173 | unsigned char iv1[EVP_MAX_IV_LENGTH*2]; | |
174 | unsigned char iv2[EVP_MAX_IV_LENGTH*2]; | |
175 | unsigned char *ms,*key,*iv,*er1,*er2; | |
176 | int client_write; | |
177 | EVP_CIPHER_CTX *dd; | |
178 | EVP_CIPHER *c; | |
413c4f45 | 179 | SSL_COMP *comp; |
58964a49 | 180 | EVP_MD *m; |
06ab81f9 | 181 | int _exp,n,i,j,k,exp_label_len,cl; |
58964a49 | 182 | |
06ab81f9 | 183 | _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
58964a49 RE |
184 | c=s->s3->tmp.new_sym_enc; |
185 | m=s->s3->tmp.new_hash; | |
186 | comp=s->s3->tmp.new_compression; | |
187 | key_block=s->s3->tmp.key_block; | |
188 | ||
189 | if (which & SSL3_CC_READ) | |
190 | { | |
191 | if ((s->enc_read_ctx == NULL) && | |
192 | ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
193 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
194 | goto err; | |
195 | dd= s->enc_read_ctx; | |
196 | s->read_hash=m; | |
dfeab068 RE |
197 | if (s->expand != NULL) |
198 | { | |
199 | COMP_CTX_free(s->expand); | |
200 | s->expand=NULL; | |
201 | } | |
202 | if (comp != NULL) | |
203 | { | |
413c4f45 | 204 | s->expand=COMP_CTX_new(comp->method); |
dfeab068 RE |
205 | if (s->expand == NULL) |
206 | { | |
207 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
208 | goto err2; | |
209 | } | |
413c4f45 MC |
210 | if (s->s3->rrec.comp == NULL) |
211 | s->s3->rrec.comp=(unsigned char *) | |
212 | Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); | |
dfeab068 RE |
213 | if (s->s3->rrec.comp == NULL) |
214 | goto err; | |
215 | } | |
58964a49 RE |
216 | memset(&(s->s3->read_sequence[0]),0,8); |
217 | mac_secret= &(s->s3->read_mac_secret[0]); | |
218 | } | |
219 | else | |
220 | { | |
221 | if ((s->enc_write_ctx == NULL) && | |
222 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
223 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
224 | goto err; | |
225 | dd= s->enc_write_ctx; | |
226 | s->write_hash=m; | |
dfeab068 RE |
227 | if (s->compress != NULL) |
228 | { | |
229 | COMP_CTX_free(s->compress); | |
230 | s->compress=NULL; | |
231 | } | |
232 | if (comp != NULL) | |
233 | { | |
413c4f45 | 234 | s->compress=COMP_CTX_new(comp->method); |
dfeab068 RE |
235 | if (s->compress == NULL) |
236 | { | |
237 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
238 | goto err2; | |
239 | } | |
240 | } | |
58964a49 RE |
241 | memset(&(s->s3->write_sequence[0]),0,8); |
242 | mac_secret= &(s->s3->write_mac_secret[0]); | |
243 | } | |
244 | ||
245 | EVP_CIPHER_CTX_init(dd); | |
246 | ||
247 | p=s->s3->tmp.key_block; | |
248 | i=EVP_MD_size(m); | |
436d318c | 249 | cl=EVP_CIPHER_key_length(c); |
06ab81f9 BL |
250 | j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
251 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; | |
436d318c | 252 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
58964a49 RE |
253 | k=EVP_CIPHER_iv_length(c); |
254 | er1= &(s->s3->client_random[0]); | |
255 | er2= &(s->s3->server_random[0]); | |
256 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
257 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
258 | { | |
259 | ms= &(p[ 0]); n=i+i; | |
260 | key= &(p[ n]); n+=j+j; | |
261 | iv= &(p[ n]); n+=k+k; | |
262 | exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; | |
263 | exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; | |
264 | client_write=1; | |
265 | } | |
266 | else | |
267 | { | |
268 | n=i; | |
269 | ms= &(p[ n]); n+=i+j; | |
270 | key= &(p[ n]); n+=j+k; | |
271 | iv= &(p[ n]); n+=k; | |
272 | exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; | |
273 | exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; | |
274 | client_write=0; | |
275 | } | |
276 | ||
277 | if (n > s->s3->tmp.key_block_length) | |
278 | { | |
279 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR); | |
280 | goto err2; | |
281 | } | |
282 | ||
283 | memcpy(mac_secret,ms,i); | |
284 | #ifdef TLS_DEBUG | |
285 | printf("which = %04X\nmac key=",which); | |
286 | { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } | |
287 | #endif | |
06ab81f9 | 288 | if (_exp) |
58964a49 RE |
289 | { |
290 | /* In here I set both the read and write key/iv to the | |
291 | * same value since only the correct one will be used :-). | |
292 | */ | |
293 | p=buf; | |
294 | memcpy(p,exp_label,exp_label_len); | |
295 | p+=exp_label_len; | |
296 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
297 | p+=SSL3_RANDOM_SIZE; | |
298 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
299 | p+=SSL3_RANDOM_SIZE; | |
dfeab068 | 300 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, |
06ab81f9 | 301 | tmp1,tmp2,EVP_CIPHER_key_length(c)); |
58964a49 RE |
302 | key=tmp1; |
303 | ||
304 | if (k > 0) | |
305 | { | |
306 | p=buf; | |
307 | memcpy(p,TLS_MD_IV_BLOCK_CONST, | |
308 | TLS_MD_IV_BLOCK_CONST_SIZE); | |
309 | p+=TLS_MD_IV_BLOCK_CONST_SIZE; | |
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; | |
314 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
dfeab068 | 315 | buf,(int)(p-buf),"",0,iv1,iv2,k*2); |
58964a49 RE |
316 | if (client_write) |
317 | iv=iv1; | |
318 | else | |
319 | iv= &(iv1[k]); | |
320 | } | |
321 | } | |
322 | ||
323 | s->session->key_arg_length=0; | |
324 | ||
325 | EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); | |
326 | #ifdef TLS_DEBUG | |
327 | printf("which = %04X\nkey=",which); | |
328 | { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } | |
329 | printf("\niv="); | |
330 | { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } | |
331 | printf("\n"); | |
332 | #endif | |
333 | ||
334 | memset(tmp1,0,sizeof(tmp1)); | |
335 | memset(tmp2,0,sizeof(tmp1)); | |
336 | memset(iv1,0,sizeof(iv1)); | |
337 | memset(iv2,0,sizeof(iv2)); | |
338 | return(1); | |
339 | err: | |
340 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
341 | err2: | |
342 | return(0); | |
343 | } | |
344 | ||
345 | int tls1_setup_key_block(s) | |
346 | SSL *s; | |
347 | { | |
348 | unsigned char *p1,*p2; | |
349 | EVP_CIPHER *c; | |
350 | EVP_MD *hash; | |
06ab81f9 | 351 | int num; |
413c4f45 | 352 | SSL_COMP *comp; |
58964a49 RE |
353 | |
354 | if (s->s3->tmp.key_block_length != 0) | |
355 | return(1); | |
356 | ||
413c4f45 | 357 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) |
58964a49 RE |
358 | { |
359 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
360 | return(0); | |
361 | } | |
362 | ||
363 | s->s3->tmp.new_sym_enc=c; | |
364 | s->s3->tmp.new_hash=hash; | |
365 | ||
58964a49 RE |
366 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); |
367 | num*=2; | |
368 | ||
369 | ssl3_cleanup_key_block(s); | |
370 | ||
371 | if ((p1=(unsigned char *)Malloc(num)) == NULL) | |
372 | goto err; | |
373 | if ((p2=(unsigned char *)Malloc(num)) == NULL) | |
374 | goto err; | |
375 | ||
376 | s->s3->tmp.key_block_length=num; | |
377 | s->s3->tmp.key_block=p1; | |
378 | ||
379 | ||
380 | #ifdef TLS_DEBUG | |
381 | printf("client random\n"); | |
382 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } | |
383 | printf("server random\n"); | |
384 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } | |
385 | printf("pre-master\n"); | |
386 | { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } | |
387 | #endif | |
388 | tls1_generate_key_block(s,p1,p2,num); | |
389 | memset(p2,0,num); | |
390 | Free(p2); | |
391 | #ifdef TLS_DEBUG | |
392 | printf("\nkey block\n"); | |
393 | { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } | |
394 | #endif | |
395 | ||
396 | return(1); | |
397 | err: | |
398 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
399 | return(0); | |
400 | } | |
401 | ||
402 | int tls1_enc(s,send) | |
403 | SSL *s; | |
404 | int send; | |
405 | { | |
406 | SSL3_RECORD *rec; | |
407 | EVP_CIPHER_CTX *ds; | |
408 | unsigned long l; | |
409 | int bs,i,ii,j,k,n=0; | |
410 | EVP_CIPHER *enc; | |
58964a49 RE |
411 | |
412 | if (send) | |
413 | { | |
414 | if (s->write_hash != NULL) | |
415 | n=EVP_MD_size(s->write_hash); | |
416 | ds=s->enc_write_ctx; | |
417 | rec= &(s->s3->wrec); | |
418 | if (s->enc_write_ctx == NULL) | |
dfeab068 | 419 | enc=NULL; |
58964a49 | 420 | else |
58964a49 | 421 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
58964a49 RE |
422 | } |
423 | else | |
424 | { | |
425 | if (s->read_hash != NULL) | |
426 | n=EVP_MD_size(s->read_hash); | |
427 | ds=s->enc_read_ctx; | |
428 | rec= &(s->s3->rrec); | |
429 | if (s->enc_read_ctx == NULL) | |
dfeab068 | 430 | enc=NULL; |
58964a49 | 431 | else |
58964a49 | 432 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
58964a49 RE |
433 | } |
434 | ||
435 | if ((s->session == NULL) || (ds == NULL) || | |
dfeab068 | 436 | (enc == NULL)) |
58964a49 RE |
437 | { |
438 | memcpy(rec->data,rec->input,rec->length); | |
439 | rec->input=rec->data; | |
440 | } | |
441 | else | |
442 | { | |
443 | l=rec->length; | |
444 | bs=EVP_CIPHER_block_size(ds->cipher); | |
445 | ||
446 | if ((bs != 1) && send) | |
447 | { | |
448 | i=bs-((int)l%bs); | |
449 | ||
450 | /* Add weird padding of upto 256 bytes */ | |
451 | ||
452 | /* we need to add 'i' padding bytes of value j */ | |
453 | j=i-1; | |
454 | if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) | |
455 | { | |
456 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
457 | j++; | |
458 | } | |
459 | for (k=(int)l; k<(int)(l+i); k++) | |
460 | rec->input[k]=j; | |
461 | l+=i; | |
462 | rec->length+=i; | |
463 | } | |
464 | ||
465 | EVP_Cipher(ds,rec->data,rec->input,l); | |
466 | ||
467 | if ((bs != 1) && !send) | |
468 | { | |
469 | ii=i=rec->data[l-1]; | |
470 | i++; | |
471 | if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) | |
472 | { | |
473 | /* First packet is even in size, so check */ | |
474 | if ((memcmp(s->s3->read_sequence, | |
475 | "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) | |
476 | s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; | |
477 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
478 | i--; | |
479 | } | |
480 | if (i > (int)rec->length) | |
481 | { | |
482 | SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
483 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
484 | return(0); | |
485 | } | |
486 | for (j=(int)(l-i); j<(int)l; j++) | |
487 | { | |
488 | if (rec->data[j] != ii) | |
489 | { | |
490 | SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED); | |
491 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
492 | return(0); | |
493 | } | |
494 | } | |
495 | rec->length-=i; | |
496 | } | |
497 | } | |
498 | return(1); | |
499 | } | |
500 | ||
501 | int tls1_cert_verify_mac(s,in_ctx,out) | |
502 | SSL *s; | |
503 | EVP_MD_CTX *in_ctx; | |
504 | unsigned char *out; | |
505 | { | |
506 | unsigned int ret; | |
507 | EVP_MD_CTX ctx; | |
508 | ||
413c4f45 | 509 | EVP_MD_CTX_copy(&ctx,in_ctx); |
58964a49 RE |
510 | EVP_DigestFinal(&ctx,out,&ret); |
511 | return((int)ret); | |
512 | } | |
513 | ||
514 | int tls1_final_finish_mac(s,in1_ctx,in2_ctx,str,slen,out) | |
515 | SSL *s; | |
516 | EVP_MD_CTX *in1_ctx,*in2_ctx; | |
517 | unsigned char *str; | |
518 | int slen; | |
519 | unsigned char *out; | |
520 | { | |
521 | unsigned int i; | |
522 | EVP_MD_CTX ctx; | |
523 | unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
524 | unsigned char *q,buf2[12]; | |
525 | ||
526 | q=buf; | |
527 | memcpy(q,str,slen); | |
528 | q+=slen; | |
529 | ||
413c4f45 | 530 | EVP_MD_CTX_copy(&ctx,in1_ctx); |
58964a49 RE |
531 | EVP_DigestFinal(&ctx,q,&i); |
532 | q+=i; | |
413c4f45 | 533 | EVP_MD_CTX_copy(&ctx,in2_ctx); |
58964a49 RE |
534 | EVP_DigestFinal(&ctx,q,&i); |
535 | q+=i; | |
536 | ||
dfeab068 | 537 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), |
58964a49 RE |
538 | s->session->master_key,s->session->master_key_length, |
539 | out,buf2,12); | |
540 | memset(&ctx,0,sizeof(EVP_MD_CTX)); | |
541 | ||
542 | return((int)12); | |
543 | } | |
544 | ||
545 | int tls1_mac(ssl,md,send) | |
546 | SSL *ssl; | |
547 | unsigned char *md; | |
548 | int send; | |
549 | { | |
550 | SSL3_RECORD *rec; | |
551 | unsigned char *mac_sec,*seq; | |
552 | EVP_MD *hash; | |
553 | unsigned int md_size; | |
554 | int i; | |
555 | HMAC_CTX hmac; | |
556 | unsigned char buf[5]; | |
557 | ||
558 | if (send) | |
559 | { | |
560 | rec= &(ssl->s3->wrec); | |
561 | mac_sec= &(ssl->s3->write_mac_secret[0]); | |
562 | seq= &(ssl->s3->write_sequence[0]); | |
563 | hash=ssl->write_hash; | |
564 | } | |
565 | else | |
566 | { | |
567 | rec= &(ssl->s3->rrec); | |
568 | mac_sec= &(ssl->s3->read_mac_secret[0]); | |
569 | seq= &(ssl->s3->read_sequence[0]); | |
570 | hash=ssl->read_hash; | |
571 | } | |
572 | ||
573 | md_size=EVP_MD_size(hash); | |
574 | ||
575 | buf[0]=rec->type; | |
576 | buf[1]=TLS1_VERSION_MAJOR; | |
577 | buf[2]=TLS1_VERSION_MINOR; | |
578 | buf[3]=rec->length>>8; | |
579 | buf[4]=rec->length&0xff; | |
580 | ||
581 | /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ | |
582 | HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash); | |
583 | HMAC_Update(&hmac,seq,8); | |
584 | HMAC_Update(&hmac,buf,5); | |
585 | HMAC_Update(&hmac,rec->input,rec->length); | |
586 | HMAC_Final(&hmac,md,&md_size); | |
587 | ||
588 | #ifdef TLS_DEBUG | |
589 | printf("sec="); | |
dfeab068 | 590 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } |
58964a49 RE |
591 | printf("seq="); |
592 | {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } | |
593 | printf("buf="); | |
594 | {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } | |
595 | printf("rec="); | |
dfeab068 | 596 | {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } |
58964a49 RE |
597 | #endif |
598 | ||
599 | for (i=7; i>=0; i--) | |
600 | if (++seq[i]) break; | |
601 | ||
602 | #ifdef TLS_DEBUG | |
dfeab068 | 603 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } |
58964a49 RE |
604 | #endif |
605 | return(md_size); | |
606 | } | |
607 | ||
608 | int tls1_generate_master_secret(s,out,p,len) | |
609 | SSL *s; | |
610 | unsigned char *out; | |
611 | unsigned char *p; | |
612 | int len; | |
613 | { | |
614 | unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; | |
615 | unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; | |
616 | ||
617 | /* Setup the stuff to munge */ | |
618 | memcpy(buf,TLS_MD_MASTER_SECRET_CONST, | |
619 | TLS_MD_MASTER_SECRET_CONST_SIZE); | |
620 | memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
621 | s->s3->client_random,SSL3_RANDOM_SIZE); | |
622 | memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
623 | s->s3->server_random,SSL3_RANDOM_SIZE); | |
624 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
625 | buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, | |
626 | s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE); | |
627 | return(SSL3_MASTER_SECRET_SIZE); | |
628 | } | |
629 | ||
630 | int tls1_alert_code(code) | |
631 | int code; | |
632 | { | |
633 | switch (code) | |
634 | { | |
635 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
636 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
637 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
638 | case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); | |
639 | case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); | |
640 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
641 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
642 | case SSL_AD_NO_CERTIFICATE: return(-1); | |
643 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
644 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
645 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
646 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
647 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
648 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
649 | case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); | |
650 | case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); | |
651 | case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); | |
652 | case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); | |
653 | case SSL_AD_EXPORT_RESTRICION: return(TLS1_AD_EXPORT_RESTRICION); | |
654 | case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); | |
655 | case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); | |
656 | case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); | |
657 | case SSL_AD_USER_CANCLED: return(TLS1_AD_USER_CANCLED); | |
658 | case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); | |
659 | default: return(-1); | |
660 | } | |
661 | } | |
662 |