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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 | ||
61f5b6f3 BL |
65 | static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec, |
66 | int sec_len, unsigned char *seed, int seed_len, | |
67 | unsigned char *out, int olen) | |
58964a49 RE |
68 | { |
69 | int chunk,n; | |
70 | unsigned int j; | |
71 | HMAC_CTX ctx; | |
72 | HMAC_CTX ctx_tmp; | |
73 | unsigned char A1[HMAC_MAX_MD_CBLOCK]; | |
74 | unsigned int A1_len; | |
75 | ||
76 | chunk=EVP_MD_size(md); | |
77 | ||
78 | HMAC_Init(&ctx,sec,sec_len,md); | |
79 | HMAC_Update(&ctx,seed,seed_len); | |
80 | HMAC_Final(&ctx,A1,&A1_len); | |
81 | ||
82 | n=0; | |
83 | for (;;) | |
84 | { | |
85 | HMAC_Init(&ctx,NULL,0,NULL); /* re-init */ | |
86 | HMAC_Update(&ctx,A1,A1_len); | |
87 | memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */ | |
88 | HMAC_Update(&ctx,seed,seed_len); | |
89 | ||
90 | if (olen > chunk) | |
91 | { | |
92 | HMAC_Final(&ctx,out,&j); | |
93 | out+=j; | |
94 | olen-=j; | |
95 | HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ | |
96 | } | |
97 | else /* last one */ | |
98 | { | |
99 | HMAC_Final(&ctx,A1,&A1_len); | |
100 | memcpy(out,A1,olen); | |
101 | break; | |
102 | } | |
103 | } | |
104 | HMAC_cleanup(&ctx); | |
105 | HMAC_cleanup(&ctx_tmp); | |
106 | memset(A1,0,sizeof(A1)); | |
107 | } | |
108 | ||
e4aac1cb | 109 | static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1, |
61f5b6f3 BL |
110 | unsigned char *label, int label_len, |
111 | const unsigned char *sec, int slen, unsigned char *out1, | |
112 | unsigned char *out2, int olen) | |
58964a49 RE |
113 | { |
114 | int len,i; | |
61f5b6f3 | 115 | const unsigned char *S1,*S2; |
58964a49 RE |
116 | |
117 | len=slen/2; | |
118 | S1=sec; | |
119 | S2= &(sec[len]); | |
120 | len+=(slen&1); /* add for odd, make longer */ | |
121 | ||
122 | ||
123 | tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); | |
124 | tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); | |
125 | ||
126 | for (i=0; i<olen; i++) | |
127 | out1[i]^=out2[i]; | |
128 | } | |
129 | ||
6b691a5c UM |
130 | static void tls1_generate_key_block(SSL *s, unsigned char *km, |
131 | unsigned char *tmp, int num) | |
58964a49 RE |
132 | { |
133 | unsigned char *p; | |
134 | unsigned char buf[SSL3_RANDOM_SIZE*2+ | |
135 | TLS_MD_MAX_CONST_SIZE]; | |
136 | p=buf; | |
137 | ||
138 | memcpy(p,TLS_MD_KEY_EXPANSION_CONST, | |
139 | TLS_MD_KEY_EXPANSION_CONST_SIZE); | |
140 | p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; | |
141 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
142 | p+=SSL3_RANDOM_SIZE; | |
143 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
144 | p+=SSL3_RANDOM_SIZE; | |
145 | ||
dfeab068 | 146 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), |
e4aac1cb BL |
147 | s->session->master_key,s->session->master_key_length, |
148 | km,tmp,num); | |
58964a49 RE |
149 | } |
150 | ||
6b691a5c | 151 | int tls1_change_cipher_state(SSL *s, int which) |
58964a49 | 152 | { |
61f5b6f3 | 153 | static const unsigned char empty[]=""; |
58964a49 RE |
154 | unsigned char *p,*key_block,*mac_secret; |
155 | unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ | |
156 | SSL3_RANDOM_SIZE*2]; | |
157 | unsigned char tmp1[EVP_MAX_KEY_LENGTH]; | |
158 | unsigned char tmp2[EVP_MAX_KEY_LENGTH]; | |
159 | unsigned char iv1[EVP_MAX_IV_LENGTH*2]; | |
160 | unsigned char iv2[EVP_MAX_IV_LENGTH*2]; | |
161 | unsigned char *ms,*key,*iv,*er1,*er2; | |
162 | int client_write; | |
163 | EVP_CIPHER_CTX *dd; | |
e778802f BL |
164 | const EVP_CIPHER *c; |
165 | const SSL_COMP *comp; | |
166 | const EVP_MD *m; | |
06ab81f9 | 167 | int _exp,n,i,j,k,exp_label_len,cl; |
58964a49 | 168 | |
06ab81f9 | 169 | _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
58964a49 RE |
170 | c=s->s3->tmp.new_sym_enc; |
171 | m=s->s3->tmp.new_hash; | |
172 | comp=s->s3->tmp.new_compression; | |
173 | key_block=s->s3->tmp.key_block; | |
174 | ||
175 | if (which & SSL3_CC_READ) | |
176 | { | |
177 | if ((s->enc_read_ctx == NULL) && | |
178 | ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
179 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
180 | goto err; | |
181 | dd= s->enc_read_ctx; | |
182 | s->read_hash=m; | |
dfeab068 RE |
183 | if (s->expand != NULL) |
184 | { | |
185 | COMP_CTX_free(s->expand); | |
186 | s->expand=NULL; | |
187 | } | |
188 | if (comp != NULL) | |
189 | { | |
413c4f45 | 190 | s->expand=COMP_CTX_new(comp->method); |
dfeab068 RE |
191 | if (s->expand == NULL) |
192 | { | |
193 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
194 | goto err2; | |
195 | } | |
413c4f45 MC |
196 | if (s->s3->rrec.comp == NULL) |
197 | s->s3->rrec.comp=(unsigned char *) | |
198 | Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); | |
dfeab068 RE |
199 | if (s->s3->rrec.comp == NULL) |
200 | goto err; | |
201 | } | |
58964a49 RE |
202 | memset(&(s->s3->read_sequence[0]),0,8); |
203 | mac_secret= &(s->s3->read_mac_secret[0]); | |
204 | } | |
205 | else | |
206 | { | |
207 | if ((s->enc_write_ctx == NULL) && | |
208 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
209 | Malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
210 | goto err; | |
211 | dd= s->enc_write_ctx; | |
212 | s->write_hash=m; | |
dfeab068 RE |
213 | if (s->compress != NULL) |
214 | { | |
215 | COMP_CTX_free(s->compress); | |
216 | s->compress=NULL; | |
217 | } | |
218 | if (comp != NULL) | |
219 | { | |
413c4f45 | 220 | s->compress=COMP_CTX_new(comp->method); |
dfeab068 RE |
221 | if (s->compress == NULL) |
222 | { | |
223 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
224 | goto err2; | |
225 | } | |
226 | } | |
58964a49 RE |
227 | memset(&(s->s3->write_sequence[0]),0,8); |
228 | mac_secret= &(s->s3->write_mac_secret[0]); | |
229 | } | |
230 | ||
231 | EVP_CIPHER_CTX_init(dd); | |
232 | ||
233 | p=s->s3->tmp.key_block; | |
234 | i=EVP_MD_size(m); | |
436d318c | 235 | cl=EVP_CIPHER_key_length(c); |
06ab81f9 BL |
236 | j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
237 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; | |
436d318c | 238 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
58964a49 RE |
239 | k=EVP_CIPHER_iv_length(c); |
240 | er1= &(s->s3->client_random[0]); | |
241 | er2= &(s->s3->server_random[0]); | |
242 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
243 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
244 | { | |
245 | ms= &(p[ 0]); n=i+i; | |
246 | key= &(p[ n]); n+=j+j; | |
247 | iv= &(p[ n]); n+=k+k; | |
248 | exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; | |
249 | exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; | |
250 | client_write=1; | |
251 | } | |
252 | else | |
253 | { | |
254 | n=i; | |
255 | ms= &(p[ n]); n+=i+j; | |
256 | key= &(p[ n]); n+=j+k; | |
257 | iv= &(p[ n]); n+=k; | |
258 | exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; | |
259 | exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; | |
260 | client_write=0; | |
261 | } | |
262 | ||
263 | if (n > s->s3->tmp.key_block_length) | |
264 | { | |
265 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR); | |
266 | goto err2; | |
267 | } | |
268 | ||
269 | memcpy(mac_secret,ms,i); | |
270 | #ifdef TLS_DEBUG | |
271 | printf("which = %04X\nmac key=",which); | |
272 | { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } | |
273 | #endif | |
06ab81f9 | 274 | if (_exp) |
58964a49 RE |
275 | { |
276 | /* In here I set both the read and write key/iv to the | |
277 | * same value since only the correct one will be used :-). | |
278 | */ | |
279 | p=buf; | |
280 | memcpy(p,exp_label,exp_label_len); | |
281 | p+=exp_label_len; | |
282 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
283 | p+=SSL3_RANDOM_SIZE; | |
284 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
285 | p+=SSL3_RANDOM_SIZE; | |
dfeab068 | 286 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, |
06ab81f9 | 287 | tmp1,tmp2,EVP_CIPHER_key_length(c)); |
58964a49 RE |
288 | key=tmp1; |
289 | ||
290 | if (k > 0) | |
291 | { | |
292 | p=buf; | |
293 | memcpy(p,TLS_MD_IV_BLOCK_CONST, | |
294 | TLS_MD_IV_BLOCK_CONST_SIZE); | |
295 | p+=TLS_MD_IV_BLOCK_CONST_SIZE; | |
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; | |
61f5b6f3 BL |
300 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0, |
301 | iv1,iv2,k*2); | |
58964a49 RE |
302 | if (client_write) |
303 | iv=iv1; | |
304 | else | |
305 | iv= &(iv1[k]); | |
306 | } | |
307 | } | |
308 | ||
309 | s->session->key_arg_length=0; | |
310 | ||
311 | EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); | |
312 | #ifdef TLS_DEBUG | |
313 | printf("which = %04X\nkey=",which); | |
314 | { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } | |
315 | printf("\niv="); | |
316 | { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } | |
317 | printf("\n"); | |
318 | #endif | |
319 | ||
320 | memset(tmp1,0,sizeof(tmp1)); | |
321 | memset(tmp2,0,sizeof(tmp1)); | |
322 | memset(iv1,0,sizeof(iv1)); | |
323 | memset(iv2,0,sizeof(iv2)); | |
324 | return(1); | |
325 | err: | |
326 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
327 | err2: | |
328 | return(0); | |
329 | } | |
330 | ||
6b691a5c | 331 | int tls1_setup_key_block(SSL *s) |
58964a49 RE |
332 | { |
333 | unsigned char *p1,*p2; | |
e778802f BL |
334 | const EVP_CIPHER *c; |
335 | const EVP_MD *hash; | |
06ab81f9 | 336 | int num; |
413c4f45 | 337 | SSL_COMP *comp; |
58964a49 RE |
338 | |
339 | if (s->s3->tmp.key_block_length != 0) | |
340 | return(1); | |
341 | ||
413c4f45 | 342 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) |
58964a49 RE |
343 | { |
344 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
345 | return(0); | |
346 | } | |
347 | ||
348 | s->s3->tmp.new_sym_enc=c; | |
349 | s->s3->tmp.new_hash=hash; | |
350 | ||
58964a49 RE |
351 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); |
352 | num*=2; | |
353 | ||
354 | ssl3_cleanup_key_block(s); | |
355 | ||
356 | if ((p1=(unsigned char *)Malloc(num)) == NULL) | |
357 | goto err; | |
358 | if ((p2=(unsigned char *)Malloc(num)) == NULL) | |
359 | goto err; | |
360 | ||
361 | s->s3->tmp.key_block_length=num; | |
362 | s->s3->tmp.key_block=p1; | |
363 | ||
364 | ||
365 | #ifdef TLS_DEBUG | |
366 | printf("client random\n"); | |
367 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } | |
368 | printf("server random\n"); | |
369 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } | |
370 | printf("pre-master\n"); | |
371 | { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } | |
372 | #endif | |
373 | tls1_generate_key_block(s,p1,p2,num); | |
374 | memset(p2,0,num); | |
375 | Free(p2); | |
376 | #ifdef TLS_DEBUG | |
377 | printf("\nkey block\n"); | |
378 | { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } | |
379 | #endif | |
380 | ||
381 | return(1); | |
382 | err: | |
383 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
384 | return(0); | |
385 | } | |
386 | ||
6b691a5c | 387 | int tls1_enc(SSL *s, int send) |
58964a49 RE |
388 | { |
389 | SSL3_RECORD *rec; | |
390 | EVP_CIPHER_CTX *ds; | |
391 | unsigned long l; | |
392 | int bs,i,ii,j,k,n=0; | |
e778802f | 393 | const EVP_CIPHER *enc; |
58964a49 RE |
394 | |
395 | if (send) | |
396 | { | |
397 | if (s->write_hash != NULL) | |
398 | n=EVP_MD_size(s->write_hash); | |
399 | ds=s->enc_write_ctx; | |
400 | rec= &(s->s3->wrec); | |
401 | if (s->enc_write_ctx == NULL) | |
dfeab068 | 402 | enc=NULL; |
58964a49 | 403 | else |
58964a49 | 404 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
58964a49 RE |
405 | } |
406 | else | |
407 | { | |
408 | if (s->read_hash != NULL) | |
409 | n=EVP_MD_size(s->read_hash); | |
410 | ds=s->enc_read_ctx; | |
411 | rec= &(s->s3->rrec); | |
412 | if (s->enc_read_ctx == NULL) | |
dfeab068 | 413 | enc=NULL; |
58964a49 | 414 | else |
58964a49 | 415 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
58964a49 RE |
416 | } |
417 | ||
418 | if ((s->session == NULL) || (ds == NULL) || | |
dfeab068 | 419 | (enc == NULL)) |
58964a49 RE |
420 | { |
421 | memcpy(rec->data,rec->input,rec->length); | |
422 | rec->input=rec->data; | |
423 | } | |
424 | else | |
425 | { | |
426 | l=rec->length; | |
427 | bs=EVP_CIPHER_block_size(ds->cipher); | |
428 | ||
429 | if ((bs != 1) && send) | |
430 | { | |
431 | i=bs-((int)l%bs); | |
432 | ||
433 | /* Add weird padding of upto 256 bytes */ | |
434 | ||
435 | /* we need to add 'i' padding bytes of value j */ | |
436 | j=i-1; | |
437 | if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) | |
438 | { | |
439 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
440 | j++; | |
441 | } | |
442 | for (k=(int)l; k<(int)(l+i); k++) | |
443 | rec->input[k]=j; | |
444 | l+=i; | |
445 | rec->length+=i; | |
446 | } | |
447 | ||
448 | EVP_Cipher(ds,rec->data,rec->input,l); | |
449 | ||
450 | if ((bs != 1) && !send) | |
451 | { | |
452 | ii=i=rec->data[l-1]; | |
453 | i++; | |
454 | if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) | |
455 | { | |
456 | /* First packet is even in size, so check */ | |
457 | if ((memcmp(s->s3->read_sequence, | |
458 | "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) | |
459 | s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; | |
460 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
461 | i--; | |
462 | } | |
463 | if (i > (int)rec->length) | |
464 | { | |
465 | SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
466 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
467 | return(0); | |
468 | } | |
469 | for (j=(int)(l-i); j<(int)l; j++) | |
470 | { | |
471 | if (rec->data[j] != ii) | |
472 | { | |
473 | SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED); | |
474 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); | |
475 | return(0); | |
476 | } | |
477 | } | |
478 | rec->length-=i; | |
479 | } | |
480 | } | |
481 | return(1); | |
482 | } | |
483 | ||
6b691a5c | 484 | int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out) |
58964a49 RE |
485 | { |
486 | unsigned int ret; | |
487 | EVP_MD_CTX ctx; | |
488 | ||
413c4f45 | 489 | EVP_MD_CTX_copy(&ctx,in_ctx); |
58964a49 RE |
490 | EVP_DigestFinal(&ctx,out,&ret); |
491 | return((int)ret); | |
492 | } | |
493 | ||
6b691a5c UM |
494 | int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx, |
495 | unsigned char *str, int slen, unsigned char *out) | |
58964a49 RE |
496 | { |
497 | unsigned int i; | |
498 | EVP_MD_CTX ctx; | |
499 | unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
500 | unsigned char *q,buf2[12]; | |
501 | ||
502 | q=buf; | |
503 | memcpy(q,str,slen); | |
504 | q+=slen; | |
505 | ||
413c4f45 | 506 | EVP_MD_CTX_copy(&ctx,in1_ctx); |
58964a49 RE |
507 | EVP_DigestFinal(&ctx,q,&i); |
508 | q+=i; | |
413c4f45 | 509 | EVP_MD_CTX_copy(&ctx,in2_ctx); |
58964a49 RE |
510 | EVP_DigestFinal(&ctx,q,&i); |
511 | q+=i; | |
512 | ||
dfeab068 | 513 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), |
58964a49 RE |
514 | s->session->master_key,s->session->master_key_length, |
515 | out,buf2,12); | |
516 | memset(&ctx,0,sizeof(EVP_MD_CTX)); | |
517 | ||
518 | return((int)12); | |
519 | } | |
520 | ||
6b691a5c | 521 | int tls1_mac(SSL *ssl, unsigned char *md, int send) |
58964a49 RE |
522 | { |
523 | SSL3_RECORD *rec; | |
524 | unsigned char *mac_sec,*seq; | |
e778802f | 525 | const EVP_MD *hash; |
58964a49 RE |
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="); | |
dfeab068 | 563 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } |
58964a49 RE |
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="); | |
dfeab068 | 569 | {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } |
58964a49 RE |
570 | #endif |
571 | ||
572 | for (i=7; i>=0; i--) | |
573 | if (++seq[i]) break; | |
574 | ||
575 | #ifdef TLS_DEBUG | |
dfeab068 | 576 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } |
58964a49 RE |
577 | #endif |
578 | return(md_size); | |
579 | } | |
580 | ||
6b691a5c UM |
581 | int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
582 | int len) | |
58964a49 RE |
583 | { |
584 | unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; | |
585 | unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; | |
586 | ||
587 | /* Setup the stuff to munge */ | |
588 | memcpy(buf,TLS_MD_MASTER_SECRET_CONST, | |
589 | TLS_MD_MASTER_SECRET_CONST_SIZE); | |
590 | memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
591 | s->s3->client_random,SSL3_RANDOM_SIZE); | |
592 | memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
593 | s->s3->server_random,SSL3_RANDOM_SIZE); | |
594 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
595 | buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, | |
596 | s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE); | |
597 | return(SSL3_MASTER_SECRET_SIZE); | |
598 | } | |
599 | ||
6b691a5c | 600 | int tls1_alert_code(int code) |
58964a49 RE |
601 | { |
602 | switch (code) | |
603 | { | |
604 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
605 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
606 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
607 | case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); | |
608 | case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); | |
609 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
610 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
611 | case SSL_AD_NO_CERTIFICATE: return(-1); | |
612 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
613 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
614 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
615 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
616 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
617 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
618 | case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); | |
619 | case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); | |
620 | case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); | |
621 | case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); | |
622 | case SSL_AD_EXPORT_RESTRICION: return(TLS1_AD_EXPORT_RESTRICION); | |
623 | case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); | |
624 | case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); | |
625 | case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); | |
626 | case SSL_AD_USER_CANCLED: return(TLS1_AD_USER_CANCLED); | |
627 | case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); | |
628 | default: return(-1); | |
629 | } | |
630 | } | |
631 |