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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> | |
ec577822 | 60 | #include <openssl/evp.h> |
d02b48c6 RE |
61 | #include "ssl_locl.h" |
62 | ||
63 | static unsigned char ssl3_pad_1[48]={ | |
64 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
65 | 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36, | |
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 | ||
71 | static unsigned char ssl3_pad_2[48]={ | |
72 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
73 | 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c, | |
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 | ||
58964a49 | 79 | static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, |
f2d9a32c | 80 | const char *sender, int len, unsigned char *p); |
58964a49 | 81 | |
027e257b | 82 | static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) |
58964a49 | 83 | { |
323f289c DSH |
84 | EVP_MD_CTX m5; |
85 | EVP_MD_CTX s1; | |
42748c08 | 86 | unsigned char buf[16],smd[SHA_DIGEST_LENGTH]; |
58964a49 RE |
87 | unsigned char c='A'; |
88 | int i,j,k; | |
89 | ||
ca570cfd UM |
90 | #ifdef CHARSET_EBCDIC |
91 | c = os_toascii[c]; /*'A' in ASCII */ | |
92 | #endif | |
58964a49 RE |
93 | k=0; |
94 | for (i=0; i<num; i+=MD5_DIGEST_LENGTH) | |
95 | { | |
96 | k++; | |
027e257b BM |
97 | if (k > sizeof buf) |
98 | { | |
99 | /* bug: 'buf' is too small for this ciphersuite */ | |
100 | SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR); | |
101 | return 0; | |
102 | } | |
103 | ||
58964a49 RE |
104 | for (j=0; j<k; j++) |
105 | buf[j]=c; | |
106 | c++; | |
323f289c DSH |
107 | EVP_DigestInit(&s1,EVP_sha1()); |
108 | EVP_DigestUpdate(&s1,buf,k); | |
109 | EVP_DigestUpdate(&s1,s->session->master_key, | |
58964a49 | 110 | s->session->master_key_length); |
323f289c DSH |
111 | EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE); |
112 | EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE); | |
113 | EVP_DigestFinal(&s1,smd,NULL); | |
58964a49 | 114 | |
323f289c DSH |
115 | EVP_DigestInit(&m5,EVP_md5()); |
116 | EVP_DigestUpdate(&m5,s->session->master_key, | |
58964a49 | 117 | s->session->master_key_length); |
323f289c | 118 | EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH); |
58964a49 RE |
119 | if ((i+MD5_DIGEST_LENGTH) > num) |
120 | { | |
323f289c | 121 | EVP_DigestFinal(&m5,smd,NULL); |
58964a49 RE |
122 | memcpy(km,smd,(num-i)); |
123 | } | |
124 | else | |
323f289c | 125 | EVP_DigestFinal(&m5,km,NULL); |
58964a49 RE |
126 | |
127 | km+=MD5_DIGEST_LENGTH; | |
128 | } | |
129 | memset(smd,0,SHA_DIGEST_LENGTH); | |
027e257b | 130 | return 1; |
58964a49 RE |
131 | } |
132 | ||
6b691a5c | 133 | int ssl3_change_cipher_state(SSL *s, int which) |
d02b48c6 RE |
134 | { |
135 | unsigned char *p,*key_block,*mac_secret; | |
136 | unsigned char exp_key[EVP_MAX_KEY_LENGTH]; | |
137 | unsigned char exp_iv[EVP_MAX_KEY_LENGTH]; | |
138 | unsigned char *ms,*key,*iv,*er1,*er2; | |
139 | EVP_CIPHER_CTX *dd; | |
e778802f | 140 | const EVP_CIPHER *c; |
dfeab068 | 141 | COMP_METHOD *comp; |
e778802f | 142 | const EVP_MD *m; |
323f289c | 143 | EVP_MD_CTX md; |
436d318c | 144 | int exp,n,i,j,k,cl; |
d02b48c6 | 145 | |
06ab81f9 | 146 | exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
d02b48c6 RE |
147 | c=s->s3->tmp.new_sym_enc; |
148 | m=s->s3->tmp.new_hash; | |
413c4f45 MC |
149 | if (s->s3->tmp.new_compression == NULL) |
150 | comp=NULL; | |
151 | else | |
152 | comp=s->s3->tmp.new_compression->method; | |
d02b48c6 RE |
153 | key_block=s->s3->tmp.key_block; |
154 | ||
155 | if (which & SSL3_CC_READ) | |
156 | { | |
157 | if ((s->enc_read_ctx == NULL) && | |
158 | ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
26a3a48d | 159 | OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) |
d02b48c6 RE |
160 | goto err; |
161 | dd= s->enc_read_ctx; | |
162 | s->read_hash=m; | |
dfeab068 RE |
163 | /* COMPRESS */ |
164 | if (s->expand != NULL) | |
165 | { | |
166 | COMP_CTX_free(s->expand); | |
167 | s->expand=NULL; | |
168 | } | |
169 | if (comp != NULL) | |
170 | { | |
171 | s->expand=COMP_CTX_new(comp); | |
172 | if (s->expand == NULL) | |
173 | { | |
174 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
175 | goto err2; | |
176 | } | |
413c4f45 MC |
177 | if (s->s3->rrec.comp == NULL) |
178 | s->s3->rrec.comp=(unsigned char *) | |
26a3a48d | 179 | OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH); |
dfeab068 RE |
180 | if (s->s3->rrec.comp == NULL) |
181 | goto err; | |
182 | } | |
d02b48c6 RE |
183 | memset(&(s->s3->read_sequence[0]),0,8); |
184 | mac_secret= &(s->s3->read_mac_secret[0]); | |
185 | } | |
186 | else | |
187 | { | |
188 | if ((s->enc_write_ctx == NULL) && | |
189 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
26a3a48d | 190 | OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) |
d02b48c6 RE |
191 | goto err; |
192 | dd= s->enc_write_ctx; | |
193 | s->write_hash=m; | |
dfeab068 RE |
194 | /* COMPRESS */ |
195 | if (s->compress != NULL) | |
196 | { | |
197 | COMP_CTX_free(s->compress); | |
198 | s->compress=NULL; | |
199 | } | |
200 | if (comp != NULL) | |
201 | { | |
202 | s->compress=COMP_CTX_new(comp); | |
203 | if (s->compress == NULL) | |
204 | { | |
205 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
206 | goto err2; | |
207 | } | |
208 | } | |
d02b48c6 RE |
209 | memset(&(s->s3->write_sequence[0]),0,8); |
210 | mac_secret= &(s->s3->write_mac_secret[0]); | |
211 | } | |
212 | ||
58964a49 RE |
213 | EVP_CIPHER_CTX_init(dd); |
214 | ||
d02b48c6 RE |
215 | p=s->s3->tmp.key_block; |
216 | i=EVP_MD_size(m); | |
436d318c | 217 | cl=EVP_CIPHER_key_length(c); |
06ab81f9 BL |
218 | j=exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
219 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; | |
436d318c | 220 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
d02b48c6 RE |
221 | k=EVP_CIPHER_iv_length(c); |
222 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
223 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
224 | { | |
225 | ms= &(p[ 0]); n=i+i; | |
226 | key= &(p[ n]); n+=j+j; | |
227 | iv= &(p[ n]); n+=k+k; | |
228 | er1= &(s->s3->client_random[0]); | |
229 | er2= &(s->s3->server_random[0]); | |
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 | er1= &(s->s3->server_random[0]); | |
238 | er2= &(s->s3->client_random[0]); | |
239 | } | |
240 | ||
241 | if (n > s->s3->tmp.key_block_length) | |
242 | { | |
5277d7cb | 243 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); |
d02b48c6 RE |
244 | goto err2; |
245 | } | |
246 | ||
247 | memcpy(mac_secret,ms,i); | |
248 | if (exp) | |
249 | { | |
250 | /* In here I set both the read and write key/iv to the | |
251 | * same value since only the correct one will be used :-). | |
252 | */ | |
323f289c DSH |
253 | EVP_DigestInit(&md,EVP_md5()); |
254 | EVP_DigestUpdate(&md,key,j); | |
255 | EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE); | |
256 | EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE); | |
257 | EVP_DigestFinal(&md,&(exp_key[0]),NULL); | |
d02b48c6 RE |
258 | key= &(exp_key[0]); |
259 | ||
58964a49 RE |
260 | if (k > 0) |
261 | { | |
323f289c DSH |
262 | EVP_DigestInit(&md,EVP_md5()); |
263 | EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE); | |
264 | EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE); | |
265 | EVP_DigestFinal(&md,&(exp_iv[0]),NULL); | |
58964a49 RE |
266 | iv= &(exp_iv[0]); |
267 | } | |
d02b48c6 RE |
268 | } |
269 | ||
58964a49 | 270 | s->session->key_arg_length=0; |
d02b48c6 RE |
271 | |
272 | EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); | |
58964a49 | 273 | |
d02b48c6 RE |
274 | memset(&(exp_key[0]),0,sizeof(exp_key)); |
275 | memset(&(exp_iv[0]),0,sizeof(exp_iv)); | |
276 | return(1); | |
277 | err: | |
278 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
279 | err2: | |
280 | return(0); | |
281 | } | |
282 | ||
6b691a5c | 283 | int ssl3_setup_key_block(SSL *s) |
d02b48c6 RE |
284 | { |
285 | unsigned char *p; | |
e778802f BL |
286 | const EVP_CIPHER *c; |
287 | const EVP_MD *hash; | |
06ab81f9 | 288 | int num; |
413c4f45 | 289 | SSL_COMP *comp; |
d02b48c6 RE |
290 | |
291 | if (s->s3->tmp.key_block_length != 0) | |
292 | return(1); | |
293 | ||
413c4f45 | 294 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) |
d02b48c6 RE |
295 | { |
296 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
297 | return(0); | |
298 | } | |
299 | ||
300 | s->s3->tmp.new_sym_enc=c; | |
301 | s->s3->tmp.new_hash=hash; | |
413c4f45 | 302 | s->s3->tmp.new_compression=comp; |
d02b48c6 | 303 | |
d02b48c6 RE |
304 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); |
305 | num*=2; | |
306 | ||
307 | ssl3_cleanup_key_block(s); | |
308 | ||
26a3a48d | 309 | if ((p=OPENSSL_malloc(num)) == NULL) |
d02b48c6 RE |
310 | goto err; |
311 | ||
312 | s->s3->tmp.key_block_length=num; | |
313 | s->s3->tmp.key_block=p; | |
314 | ||
027e257b | 315 | return ssl3_generate_key_block(s,p,num); |
d02b48c6 | 316 | |
d02b48c6 RE |
317 | err: |
318 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
319 | return(0); | |
320 | } | |
321 | ||
6b691a5c | 322 | void ssl3_cleanup_key_block(SSL *s) |
d02b48c6 RE |
323 | { |
324 | if (s->s3->tmp.key_block != NULL) | |
325 | { | |
326 | memset(s->s3->tmp.key_block,0, | |
327 | s->s3->tmp.key_block_length); | |
26a3a48d | 328 | OPENSSL_free(s->s3->tmp.key_block); |
d02b48c6 RE |
329 | s->s3->tmp.key_block=NULL; |
330 | } | |
331 | s->s3->tmp.key_block_length=0; | |
332 | } | |
333 | ||
6b691a5c | 334 | int ssl3_enc(SSL *s, int send) |
d02b48c6 RE |
335 | { |
336 | SSL3_RECORD *rec; | |
337 | EVP_CIPHER_CTX *ds; | |
338 | unsigned long l; | |
339 | int bs,i; | |
e778802f | 340 | const EVP_CIPHER *enc; |
d02b48c6 RE |
341 | |
342 | if (send) | |
343 | { | |
344 | ds=s->enc_write_ctx; | |
345 | rec= &(s->s3->wrec); | |
346 | if (s->enc_write_ctx == NULL) | |
dfeab068 | 347 | enc=NULL; |
d02b48c6 | 348 | else |
d02b48c6 | 349 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
d02b48c6 RE |
350 | } |
351 | else | |
352 | { | |
353 | ds=s->enc_read_ctx; | |
354 | rec= &(s->s3->rrec); | |
355 | if (s->enc_read_ctx == NULL) | |
dfeab068 | 356 | enc=NULL; |
d02b48c6 | 357 | else |
d02b48c6 | 358 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
d02b48c6 RE |
359 | } |
360 | ||
361 | if ((s->session == NULL) || (ds == NULL) || | |
dfeab068 | 362 | (enc == NULL)) |
d02b48c6 | 363 | { |
44e48abc | 364 | memmove(rec->data,rec->input,rec->length); |
d02b48c6 RE |
365 | rec->input=rec->data; |
366 | } | |
367 | else | |
368 | { | |
369 | l=rec->length; | |
370 | bs=EVP_CIPHER_block_size(ds->cipher); | |
371 | ||
dfeab068 RE |
372 | /* COMPRESS */ |
373 | ||
d02b48c6 RE |
374 | if ((bs != 1) && send) |
375 | { | |
376 | i=bs-((int)l%bs); | |
377 | ||
378 | /* we need to add 'i-1' padding bytes */ | |
379 | l+=i; | |
380 | rec->length+=i; | |
381 | rec->input[l-1]=(i-1); | |
382 | } | |
285b4275 BM |
383 | |
384 | if (!send) | |
385 | { | |
386 | if (l == 0 || l%bs != 0) | |
387 | { | |
388 | SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
389 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR); | |
390 | return(0); | |
391 | } | |
392 | } | |
393 | ||
d02b48c6 RE |
394 | EVP_Cipher(ds,rec->data,rec->input,l); |
395 | ||
396 | if ((bs != 1) && !send) | |
397 | { | |
398 | i=rec->data[l-1]+1; | |
285b4275 BM |
399 | /* SSL 3.0 bounds the number of padding bytes by the block size; |
400 | * padding bytes (except that last) are arbitrary */ | |
d02b48c6 RE |
401 | if (i > bs) |
402 | { | |
403 | SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
58964a49 | 404 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR); |
d02b48c6 RE |
405 | return(0); |
406 | } | |
407 | rec->length-=i; | |
408 | } | |
409 | } | |
410 | return(1); | |
411 | } | |
412 | ||
6b691a5c | 413 | void ssl3_init_finished_mac(SSL *s) |
d02b48c6 | 414 | { |
58964a49 RE |
415 | EVP_DigestInit(&(s->s3->finish_dgst1),s->ctx->md5); |
416 | EVP_DigestInit(&(s->s3->finish_dgst2),s->ctx->sha1); | |
d02b48c6 RE |
417 | } |
418 | ||
6b691a5c | 419 | void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) |
d02b48c6 RE |
420 | { |
421 | EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len); | |
422 | EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len); | |
423 | } | |
424 | ||
6b691a5c | 425 | int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p) |
58964a49 RE |
426 | { |
427 | return(ssl3_handshake_mac(s,ctx,NULL,0,p)); | |
428 | } | |
429 | ||
6b691a5c | 430 | int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2, |
245206ea | 431 | const char *sender, int len, unsigned char *p) |
58964a49 RE |
432 | { |
433 | int ret; | |
434 | ||
435 | ret=ssl3_handshake_mac(s,ctx1,sender,len,p); | |
436 | p+=ret; | |
437 | ret+=ssl3_handshake_mac(s,ctx2,sender,len,p); | |
438 | return(ret); | |
439 | } | |
440 | ||
6b691a5c | 441 | static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx, |
f2d9a32c | 442 | const char *sender, int len, unsigned char *p) |
d02b48c6 RE |
443 | { |
444 | unsigned int ret; | |
445 | int npad,n; | |
446 | unsigned int i; | |
447 | unsigned char md_buf[EVP_MAX_MD_SIZE]; | |
448 | EVP_MD_CTX ctx; | |
449 | ||
413c4f45 | 450 | EVP_MD_CTX_copy(&ctx,in_ctx); |
d02b48c6 RE |
451 | |
452 | n=EVP_MD_CTX_size(&ctx); | |
453 | npad=(48/n)*n; | |
454 | ||
455 | if (sender != NULL) | |
58964a49 | 456 | EVP_DigestUpdate(&ctx,sender,len); |
d02b48c6 RE |
457 | EVP_DigestUpdate(&ctx,s->session->master_key, |
458 | s->session->master_key_length); | |
459 | EVP_DigestUpdate(&ctx,ssl3_pad_1,npad); | |
460 | EVP_DigestFinal(&ctx,md_buf,&i); | |
461 | ||
72b60351 | 462 | EVP_DigestInit(&ctx,EVP_MD_CTX_md(&ctx)); |
d02b48c6 RE |
463 | EVP_DigestUpdate(&ctx,s->session->master_key, |
464 | s->session->master_key_length); | |
465 | EVP_DigestUpdate(&ctx,ssl3_pad_2,npad); | |
466 | EVP_DigestUpdate(&ctx,md_buf,i); | |
467 | EVP_DigestFinal(&ctx,p,&ret); | |
468 | ||
469 | memset(&ctx,0,sizeof(EVP_MD_CTX)); | |
470 | ||
471 | return((int)ret); | |
472 | } | |
473 | ||
6b691a5c | 474 | int ssl3_mac(SSL *ssl, unsigned char *md, int send) |
d02b48c6 RE |
475 | { |
476 | SSL3_RECORD *rec; | |
477 | unsigned char *mac_sec,*seq; | |
478 | EVP_MD_CTX md_ctx; | |
e778802f | 479 | const EVP_MD *hash; |
d02b48c6 RE |
480 | unsigned char *p,rec_char; |
481 | unsigned int md_size; | |
482 | int npad,i; | |
483 | ||
484 | if (send) | |
485 | { | |
486 | rec= &(ssl->s3->wrec); | |
487 | mac_sec= &(ssl->s3->write_mac_secret[0]); | |
488 | seq= &(ssl->s3->write_sequence[0]); | |
489 | hash=ssl->write_hash; | |
490 | } | |
491 | else | |
492 | { | |
493 | rec= &(ssl->s3->rrec); | |
494 | mac_sec= &(ssl->s3->read_mac_secret[0]); | |
495 | seq= &(ssl->s3->read_sequence[0]); | |
496 | hash=ssl->read_hash; | |
497 | } | |
498 | ||
499 | md_size=EVP_MD_size(hash); | |
500 | npad=(48/md_size)*md_size; | |
501 | ||
d02b48c6 RE |
502 | /* Chop the digest off the end :-) */ |
503 | ||
504 | EVP_DigestInit( &md_ctx,hash); | |
505 | EVP_DigestUpdate(&md_ctx,mac_sec,md_size); | |
506 | EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad); | |
507 | EVP_DigestUpdate(&md_ctx,seq,8); | |
508 | rec_char=rec->type; | |
509 | EVP_DigestUpdate(&md_ctx,&rec_char,1); | |
510 | p=md; | |
511 | s2n(rec->length,p); | |
512 | EVP_DigestUpdate(&md_ctx,md,2); | |
513 | EVP_DigestUpdate(&md_ctx,rec->input,rec->length); | |
514 | EVP_DigestFinal( &md_ctx,md,NULL); | |
515 | ||
516 | EVP_DigestInit( &md_ctx,hash); | |
517 | EVP_DigestUpdate(&md_ctx,mac_sec,md_size); | |
518 | EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad); | |
519 | EVP_DigestUpdate(&md_ctx,md,md_size); | |
520 | EVP_DigestFinal( &md_ctx,md,&md_size); | |
521 | ||
522 | for (i=7; i>=0; i--) | |
1876cc32 BM |
523 | { |
524 | ++seq[i]; | |
525 | if (seq[i] != 0) break; | |
526 | } | |
d02b48c6 | 527 | |
d02b48c6 RE |
528 | return(md_size); |
529 | } | |
530 | ||
6b691a5c UM |
531 | int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
532 | int len) | |
d02b48c6 | 533 | { |
e778802f | 534 | static const unsigned char *salt[3]={ |
ca570cfd | 535 | #ifndef CHARSET_EBCDIC |
e778802f BL |
536 | (const unsigned char *)"A", |
537 | (const unsigned char *)"BB", | |
538 | (const unsigned char *)"CCC", | |
ca570cfd UM |
539 | #else |
540 | (const unsigned char *)"\x41", | |
541 | (const unsigned char *)"\x42\x42", | |
542 | (const unsigned char *)"\x43\x43\x43", | |
543 | #endif | |
d02b48c6 RE |
544 | }; |
545 | unsigned char buf[EVP_MAX_MD_SIZE]; | |
546 | EVP_MD_CTX ctx; | |
547 | int i,ret=0; | |
548 | unsigned int n; | |
549 | ||
550 | for (i=0; i<3; i++) | |
551 | { | |
58964a49 | 552 | EVP_DigestInit(&ctx,s->ctx->sha1); |
e778802f | 553 | EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i])); |
d02b48c6 RE |
554 | EVP_DigestUpdate(&ctx,p,len); |
555 | EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]), | |
556 | SSL3_RANDOM_SIZE); | |
557 | EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]), | |
558 | SSL3_RANDOM_SIZE); | |
559 | EVP_DigestFinal(&ctx,buf,&n); | |
560 | ||
58964a49 | 561 | EVP_DigestInit(&ctx,s->ctx->md5); |
d02b48c6 RE |
562 | EVP_DigestUpdate(&ctx,p,len); |
563 | EVP_DigestUpdate(&ctx,buf,n); | |
564 | EVP_DigestFinal(&ctx,out,&n); | |
565 | out+=n; | |
566 | ret+=n; | |
567 | } | |
568 | return(ret); | |
569 | } | |
570 | ||
6b691a5c | 571 | int ssl3_alert_code(int code) |
58964a49 RE |
572 | { |
573 | switch (code) | |
574 | { | |
575 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
576 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
577 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
578 | case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC); | |
579 | case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC); | |
580 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
581 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
582 | case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE); | |
583 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
584 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
585 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
586 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
587 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
588 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
589 | case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE); | |
590 | case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE); | |
591 | case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
592 | case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
657e60fa | 593 | case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE); |
58964a49 RE |
594 | case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE); |
595 | case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE); | |
596 | case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE); | |
657e60fa | 597 | case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE); |
58964a49 RE |
598 | case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */ |
599 | default: return(-1); | |
600 | } | |
601 | } | |
602 |