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d02b48c6 | 1 | /* ssl/s3_enc.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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> | |
d02f751c UM |
60 | #include <openssl/md5.h> |
61 | #include <openssl/sha.h> | |
ec577822 | 62 | #include <openssl/evp.h> |
d02b48c6 RE |
63 | #include "ssl_locl.h" |
64 | ||
65 | static unsigned char ssl3_pad_1[48]={ | |
66 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
67 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
68 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
69 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
70 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
71 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 }; | |
72 | ||
73 | static unsigned char ssl3_pad_2[48]={ | |
74 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
75 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
76 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
77 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
78 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
79 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c }; | |
80 | ||
58964a49 | 81 | static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, |
f2d9a32c | 82 | const char *sender, int len, unsigned char *p); |
58964a49 | 83 | |
6b691a5c | 84 | static void ssl3_generate_key_block(SSL *s, unsigned char *km, int num) |
58964a49 RE |
85 | { |
86 | MD5_CTX m5; | |
87 | SHA_CTX s1; | |
88 | unsigned char buf[8],smd[SHA_DIGEST_LENGTH]; | |
89 | unsigned char c='A'; | |
90 | int i,j,k; | |
91 | ||
ca570cfd UM |
92 | #ifdef CHARSET_EBCDIC |
93 | c = os_toascii[c]; /*'A' in ASCII */ | |
94 | #endif | |
58964a49 RE |
95 | k=0; |
96 | for (i=0; i<num; i+=MD5_DIGEST_LENGTH) | |
97 | { | |
98 | k++; | |
99 | for (j=0; j<k; j++) | |
100 | buf[j]=c; | |
101 | c++; | |
102 | SHA1_Init( &s1); | |
103 | SHA1_Update(&s1,buf,k); | |
104 | SHA1_Update(&s1,s->session->master_key, | |
105 | s->session->master_key_length); | |
106 | SHA1_Update(&s1,s->s3->server_random,SSL3_RANDOM_SIZE); | |
107 | SHA1_Update(&s1,s->s3->client_random,SSL3_RANDOM_SIZE); | |
108 | SHA1_Final( smd,&s1); | |
109 | ||
110 | MD5_Init( &m5); | |
111 | MD5_Update(&m5,s->session->master_key, | |
112 | s->session->master_key_length); | |
113 | MD5_Update(&m5,smd,SHA_DIGEST_LENGTH); | |
114 | if ((i+MD5_DIGEST_LENGTH) > num) | |
115 | { | |
116 | MD5_Final(smd,&m5); | |
117 | memcpy(km,smd,(num-i)); | |
118 | } | |
119 | else | |
120 | MD5_Final(km,&m5); | |
121 | ||
122 | km+=MD5_DIGEST_LENGTH; | |
123 | } | |
124 | memset(smd,0,SHA_DIGEST_LENGTH); | |
125 | } | |
126 | ||
6b691a5c | 127 | int ssl3_change_cipher_state(SSL *s, int which) |
d02b48c6 RE |
128 | { |
129 | unsigned char *p,*key_block,*mac_secret; | |
130 | unsigned char exp_key[EVP_MAX_KEY_LENGTH]; | |
131 | unsigned char exp_iv[EVP_MAX_KEY_LENGTH]; | |
132 | unsigned char *ms,*key,*iv,*er1,*er2; | |
133 | EVP_CIPHER_CTX *dd; | |
e778802f | 134 | const EVP_CIPHER *c; |
dfeab068 | 135 | COMP_METHOD *comp; |
e778802f | 136 | const EVP_MD *m; |
d02b48c6 | 137 | MD5_CTX md; |
436d318c | 138 | int exp,n,i,j,k,cl; |
d02b48c6 | 139 | |
06ab81f9 | 140 | exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
d02b48c6 RE |
141 | c=s->s3->tmp.new_sym_enc; |
142 | m=s->s3->tmp.new_hash; | |
413c4f45 MC |
143 | if (s->s3->tmp.new_compression == NULL) |
144 | comp=NULL; | |
145 | else | |
146 | comp=s->s3->tmp.new_compression->method; | |
d02b48c6 RE |
147 | key_block=s->s3->tmp.key_block; |
148 | ||
149 | if (which & SSL3_CC_READ) | |
150 | { | |
151 | if ((s->enc_read_ctx == NULL) && | |
152 | ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
26a3a48d | 153 | OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) |
d02b48c6 RE |
154 | goto err; |
155 | dd= s->enc_read_ctx; | |
156 | s->read_hash=m; | |
dfeab068 RE |
157 | /* COMPRESS */ |
158 | if (s->expand != NULL) | |
159 | { | |
160 | COMP_CTX_free(s->expand); | |
161 | s->expand=NULL; | |
162 | } | |
163 | if (comp != NULL) | |
164 | { | |
165 | s->expand=COMP_CTX_new(comp); | |
166 | if (s->expand == NULL) | |
167 | { | |
168 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
169 | goto err2; | |
170 | } | |
413c4f45 MC |
171 | if (s->s3->rrec.comp == NULL) |
172 | s->s3->rrec.comp=(unsigned char *) | |
26a3a48d | 173 | OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH); |
dfeab068 RE |
174 | if (s->s3->rrec.comp == NULL) |
175 | goto err; | |
176 | } | |
d02b48c6 RE |
177 | memset(&(s->s3->read_sequence[0]),0,8); |
178 | mac_secret= &(s->s3->read_mac_secret[0]); | |
179 | } | |
180 | else | |
181 | { | |
182 | if ((s->enc_write_ctx == NULL) && | |
183 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
26a3a48d | 184 | OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) |
d02b48c6 RE |
185 | goto err; |
186 | dd= s->enc_write_ctx; | |
187 | s->write_hash=m; | |
dfeab068 RE |
188 | /* COMPRESS */ |
189 | if (s->compress != NULL) | |
190 | { | |
191 | COMP_CTX_free(s->compress); | |
192 | s->compress=NULL; | |
193 | } | |
194 | if (comp != NULL) | |
195 | { | |
196 | s->compress=COMP_CTX_new(comp); | |
197 | if (s->compress == NULL) | |
198 | { | |
199 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
200 | goto err2; | |
201 | } | |
202 | } | |
d02b48c6 RE |
203 | memset(&(s->s3->write_sequence[0]),0,8); |
204 | mac_secret= &(s->s3->write_mac_secret[0]); | |
205 | } | |
206 | ||
58964a49 RE |
207 | EVP_CIPHER_CTX_init(dd); |
208 | ||
d02b48c6 RE |
209 | p=s->s3->tmp.key_block; |
210 | i=EVP_MD_size(m); | |
436d318c | 211 | cl=EVP_CIPHER_key_length(c); |
06ab81f9 BL |
212 | j=exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
213 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; | |
436d318c | 214 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
d02b48c6 RE |
215 | k=EVP_CIPHER_iv_length(c); |
216 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
217 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
218 | { | |
219 | ms= &(p[ 0]); n=i+i; | |
220 | key= &(p[ n]); n+=j+j; | |
221 | iv= &(p[ n]); n+=k+k; | |
222 | er1= &(s->s3->client_random[0]); | |
223 | er2= &(s->s3->server_random[0]); | |
224 | } | |
225 | else | |
226 | { | |
227 | n=i; | |
228 | ms= &(p[ n]); n+=i+j; | |
229 | key= &(p[ n]); n+=j+k; | |
230 | iv= &(p[ n]); n+=k; | |
231 | er1= &(s->s3->server_random[0]); | |
232 | er2= &(s->s3->client_random[0]); | |
233 | } | |
234 | ||
235 | if (n > s->s3->tmp.key_block_length) | |
236 | { | |
237 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR); | |
238 | goto err2; | |
239 | } | |
240 | ||
241 | memcpy(mac_secret,ms,i); | |
242 | if (exp) | |
243 | { | |
244 | /* In here I set both the read and write key/iv to the | |
245 | * same value since only the correct one will be used :-). | |
246 | */ | |
247 | MD5_Init(&md); | |
248 | MD5_Update(&md,key,j); | |
249 | MD5_Update(&md,er1,SSL3_RANDOM_SIZE); | |
250 | MD5_Update(&md,er2,SSL3_RANDOM_SIZE); | |
251 | MD5_Final(&(exp_key[0]),&md); | |
252 | key= &(exp_key[0]); | |
253 | ||
58964a49 RE |
254 | if (k > 0) |
255 | { | |
256 | MD5_Init(&md); | |
257 | MD5_Update(&md,er1,SSL3_RANDOM_SIZE); | |
258 | MD5_Update(&md,er2,SSL3_RANDOM_SIZE); | |
259 | MD5_Final(&(exp_iv[0]),&md); | |
260 | iv= &(exp_iv[0]); | |
261 | } | |
d02b48c6 RE |
262 | } |
263 | ||
58964a49 | 264 | s->session->key_arg_length=0; |
d02b48c6 RE |
265 | |
266 | EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); | |
58964a49 | 267 | |
d02b48c6 RE |
268 | memset(&(exp_key[0]),0,sizeof(exp_key)); |
269 | memset(&(exp_iv[0]),0,sizeof(exp_iv)); | |
270 | return(1); | |
271 | err: | |
272 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
273 | err2: | |
274 | return(0); | |
275 | } | |
276 | ||
6b691a5c | 277 | int ssl3_setup_key_block(SSL *s) |
d02b48c6 RE |
278 | { |
279 | unsigned char *p; | |
e778802f BL |
280 | const EVP_CIPHER *c; |
281 | const EVP_MD *hash; | |
06ab81f9 | 282 | int num; |
413c4f45 | 283 | SSL_COMP *comp; |
d02b48c6 RE |
284 | |
285 | if (s->s3->tmp.key_block_length != 0) | |
286 | return(1); | |
287 | ||
413c4f45 | 288 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) |
d02b48c6 RE |
289 | { |
290 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
291 | return(0); | |
292 | } | |
293 | ||
294 | s->s3->tmp.new_sym_enc=c; | |
295 | s->s3->tmp.new_hash=hash; | |
413c4f45 | 296 | s->s3->tmp.new_compression=comp; |
d02b48c6 | 297 | |
d02b48c6 RE |
298 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); |
299 | num*=2; | |
300 | ||
301 | ssl3_cleanup_key_block(s); | |
302 | ||
26a3a48d | 303 | if ((p=OPENSSL_malloc(num)) == NULL) |
d02b48c6 RE |
304 | goto err; |
305 | ||
306 | s->s3->tmp.key_block_length=num; | |
307 | s->s3->tmp.key_block=p; | |
308 | ||
309 | ssl3_generate_key_block(s,p,num); | |
310 | ||
311 | return(1); | |
312 | err: | |
313 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
314 | return(0); | |
315 | } | |
316 | ||
6b691a5c | 317 | void ssl3_cleanup_key_block(SSL *s) |
d02b48c6 RE |
318 | { |
319 | if (s->s3->tmp.key_block != NULL) | |
320 | { | |
321 | memset(s->s3->tmp.key_block,0, | |
322 | s->s3->tmp.key_block_length); | |
26a3a48d | 323 | OPENSSL_free(s->s3->tmp.key_block); |
d02b48c6 RE |
324 | s->s3->tmp.key_block=NULL; |
325 | } | |
326 | s->s3->tmp.key_block_length=0; | |
327 | } | |
328 | ||
6b691a5c | 329 | int ssl3_enc(SSL *s, int send) |
d02b48c6 RE |
330 | { |
331 | SSL3_RECORD *rec; | |
332 | EVP_CIPHER_CTX *ds; | |
333 | unsigned long l; | |
334 | int bs,i; | |
e778802f | 335 | const EVP_CIPHER *enc; |
d02b48c6 RE |
336 | |
337 | if (send) | |
338 | { | |
339 | ds=s->enc_write_ctx; | |
340 | rec= &(s->s3->wrec); | |
341 | if (s->enc_write_ctx == NULL) | |
dfeab068 | 342 | enc=NULL; |
d02b48c6 | 343 | else |
d02b48c6 | 344 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
d02b48c6 RE |
345 | } |
346 | else | |
347 | { | |
348 | ds=s->enc_read_ctx; | |
349 | rec= &(s->s3->rrec); | |
350 | if (s->enc_read_ctx == NULL) | |
dfeab068 | 351 | enc=NULL; |
d02b48c6 | 352 | else |
d02b48c6 | 353 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
d02b48c6 RE |
354 | } |
355 | ||
356 | if ((s->session == NULL) || (ds == NULL) || | |
dfeab068 | 357 | (enc == NULL)) |
d02b48c6 RE |
358 | { |
359 | memcpy(rec->data,rec->input,rec->length); | |
360 | rec->input=rec->data; | |
361 | } | |
362 | else | |
363 | { | |
364 | l=rec->length; | |
365 | bs=EVP_CIPHER_block_size(ds->cipher); | |
366 | ||
dfeab068 RE |
367 | /* COMPRESS */ |
368 | ||
d02b48c6 RE |
369 | /* This should be using (bs-1) and bs instead of 7 and 8 */ |
370 | if ((bs != 1) && send) | |
371 | { | |
372 | i=bs-((int)l%bs); | |
373 | ||
374 | /* we need to add 'i-1' padding bytes */ | |
375 | l+=i; | |
376 | rec->length+=i; | |
377 | rec->input[l-1]=(i-1); | |
378 | } | |
379 | ||
380 | EVP_Cipher(ds,rec->data,rec->input,l); | |
381 | ||
382 | if ((bs != 1) && !send) | |
383 | { | |
384 | i=rec->data[l-1]+1; | |
385 | if (i > bs) | |
386 | { | |
387 | SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
58964a49 | 388 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR); |
d02b48c6 RE |
389 | return(0); |
390 | } | |
391 | rec->length-=i; | |
392 | } | |
393 | } | |
394 | return(1); | |
395 | } | |
396 | ||
6b691a5c | 397 | void ssl3_init_finished_mac(SSL *s) |
d02b48c6 | 398 | { |
58964a49 RE |
399 | EVP_DigestInit(&(s->s3->finish_dgst1),s->ctx->md5); |
400 | EVP_DigestInit(&(s->s3->finish_dgst2),s->ctx->sha1); | |
d02b48c6 RE |
401 | } |
402 | ||
6b691a5c | 403 | void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) |
d02b48c6 RE |
404 | { |
405 | EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len); | |
406 | EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len); | |
407 | } | |
408 | ||
6b691a5c | 409 | int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p) |
58964a49 RE |
410 | { |
411 | return(ssl3_handshake_mac(s,ctx,NULL,0,p)); | |
412 | } | |
413 | ||
6b691a5c | 414 | int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2, |
245206ea | 415 | const char *sender, int len, unsigned char *p) |
58964a49 RE |
416 | { |
417 | int ret; | |
418 | ||
419 | ret=ssl3_handshake_mac(s,ctx1,sender,len,p); | |
420 | p+=ret; | |
421 | ret+=ssl3_handshake_mac(s,ctx2,sender,len,p); | |
422 | return(ret); | |
423 | } | |
424 | ||
6b691a5c | 425 | static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, |
f2d9a32c | 426 | const char *sender, int len, unsigned char *p) |
d02b48c6 RE |
427 | { |
428 | unsigned int ret; | |
429 | int npad,n; | |
430 | unsigned int i; | |
431 | unsigned char md_buf[EVP_MAX_MD_SIZE]; | |
432 | EVP_MD_CTX ctx; | |
433 | ||
413c4f45 | 434 | EVP_MD_CTX_copy(&ctx,in_ctx); |
d02b48c6 RE |
435 | |
436 | n=EVP_MD_CTX_size(&ctx); | |
437 | npad=(48/n)*n; | |
438 | ||
439 | if (sender != NULL) | |
58964a49 | 440 | EVP_DigestUpdate(&ctx,sender,len); |
d02b48c6 RE |
441 | EVP_DigestUpdate(&ctx,s->session->master_key, |
442 | s->session->master_key_length); | |
443 | EVP_DigestUpdate(&ctx,ssl3_pad_1,npad); | |
444 | EVP_DigestFinal(&ctx,md_buf,&i); | |
445 | ||
72b60351 | 446 | EVP_DigestInit(&ctx,EVP_MD_CTX_md(&ctx)); |
d02b48c6 RE |
447 | EVP_DigestUpdate(&ctx,s->session->master_key, |
448 | s->session->master_key_length); | |
449 | EVP_DigestUpdate(&ctx,ssl3_pad_2,npad); | |
450 | EVP_DigestUpdate(&ctx,md_buf,i); | |
451 | EVP_DigestFinal(&ctx,p,&ret); | |
452 | ||
453 | memset(&ctx,0,sizeof(EVP_MD_CTX)); | |
454 | ||
455 | return((int)ret); | |
456 | } | |
457 | ||
6b691a5c | 458 | int ssl3_mac(SSL *ssl, unsigned char *md, int send) |
d02b48c6 RE |
459 | { |
460 | SSL3_RECORD *rec; | |
461 | unsigned char *mac_sec,*seq; | |
462 | EVP_MD_CTX md_ctx; | |
e778802f | 463 | const EVP_MD *hash; |
d02b48c6 RE |
464 | unsigned char *p,rec_char; |
465 | unsigned int md_size; | |
466 | int npad,i; | |
467 | ||
468 | if (send) | |
469 | { | |
470 | rec= &(ssl->s3->wrec); | |
471 | mac_sec= &(ssl->s3->write_mac_secret[0]); | |
472 | seq= &(ssl->s3->write_sequence[0]); | |
473 | hash=ssl->write_hash; | |
474 | } | |
475 | else | |
476 | { | |
477 | rec= &(ssl->s3->rrec); | |
478 | mac_sec= &(ssl->s3->read_mac_secret[0]); | |
479 | seq= &(ssl->s3->read_sequence[0]); | |
480 | hash=ssl->read_hash; | |
481 | } | |
482 | ||
483 | md_size=EVP_MD_size(hash); | |
484 | npad=(48/md_size)*md_size; | |
485 | ||
d02b48c6 RE |
486 | /* Chop the digest off the end :-) */ |
487 | ||
488 | EVP_DigestInit( &md_ctx,hash); | |
489 | EVP_DigestUpdate(&md_ctx,mac_sec,md_size); | |
490 | EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad); | |
491 | EVP_DigestUpdate(&md_ctx,seq,8); | |
492 | rec_char=rec->type; | |
493 | EVP_DigestUpdate(&md_ctx,&rec_char,1); | |
494 | p=md; | |
495 | s2n(rec->length,p); | |
496 | EVP_DigestUpdate(&md_ctx,md,2); | |
497 | EVP_DigestUpdate(&md_ctx,rec->input,rec->length); | |
498 | EVP_DigestFinal( &md_ctx,md,NULL); | |
499 | ||
500 | EVP_DigestInit( &md_ctx,hash); | |
501 | EVP_DigestUpdate(&md_ctx,mac_sec,md_size); | |
502 | EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad); | |
503 | EVP_DigestUpdate(&md_ctx,md,md_size); | |
504 | EVP_DigestFinal( &md_ctx,md,&md_size); | |
505 | ||
506 | for (i=7; i>=0; i--) | |
507 | if (++seq[i]) break; | |
508 | ||
d02b48c6 RE |
509 | return(md_size); |
510 | } | |
511 | ||
6b691a5c UM |
512 | int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
513 | int len) | |
d02b48c6 | 514 | { |
e778802f | 515 | static const unsigned char *salt[3]={ |
ca570cfd | 516 | #ifndef CHARSET_EBCDIC |
e778802f BL |
517 | (const unsigned char *)"A", |
518 | (const unsigned char *)"BB", | |
519 | (const unsigned char *)"CCC", | |
ca570cfd UM |
520 | #else |
521 | (const unsigned char *)"\x41", | |
522 | (const unsigned char *)"\x42\x42", | |
523 | (const unsigned char *)"\x43\x43\x43", | |
524 | #endif | |
d02b48c6 RE |
525 | }; |
526 | unsigned char buf[EVP_MAX_MD_SIZE]; | |
527 | EVP_MD_CTX ctx; | |
528 | int i,ret=0; | |
529 | unsigned int n; | |
530 | ||
531 | for (i=0; i<3; i++) | |
532 | { | |
58964a49 | 533 | EVP_DigestInit(&ctx,s->ctx->sha1); |
e778802f | 534 | EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i])); |
d02b48c6 RE |
535 | EVP_DigestUpdate(&ctx,p,len); |
536 | EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]), | |
537 | SSL3_RANDOM_SIZE); | |
538 | EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]), | |
539 | SSL3_RANDOM_SIZE); | |
540 | EVP_DigestFinal(&ctx,buf,&n); | |
541 | ||
58964a49 | 542 | EVP_DigestInit(&ctx,s->ctx->md5); |
d02b48c6 RE |
543 | EVP_DigestUpdate(&ctx,p,len); |
544 | EVP_DigestUpdate(&ctx,buf,n); | |
545 | EVP_DigestFinal(&ctx,out,&n); | |
546 | out+=n; | |
547 | ret+=n; | |
548 | } | |
549 | return(ret); | |
550 | } | |
551 | ||
6b691a5c | 552 | int ssl3_alert_code(int code) |
58964a49 RE |
553 | { |
554 | switch (code) | |
555 | { | |
556 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
557 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
558 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
559 | case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC); | |
560 | case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC); | |
561 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
562 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
563 | case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE); | |
564 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
565 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
566 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
567 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
568 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
569 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
570 | case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE); | |
571 | case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE); | |
572 | case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
573 | case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
657e60fa | 574 | case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE); |
58964a49 RE |
575 | case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE); |
576 | case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE); | |
577 | case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
657e60fa | 578 | case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE); |
58964a49 RE |
579 | case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */ |
580 | default: return(-1); | |
581 | } | |
582 | } | |
583 |