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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 | */ | |
82b0bf0b BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
58964a49 RE |
111 | |
112 | #include <stdio.h> | |
7b63c0fa | 113 | #include "ssl_locl.h" |
ec577822 BM |
114 | #include <openssl/comp.h> |
115 | #include <openssl/evp.h> | |
116 | #include <openssl/hmac.h> | |
dbad1690 | 117 | #include <openssl/md5.h> |
58964a49 | 118 | |
61f5b6f3 BL |
119 | static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec, |
120 | int sec_len, unsigned char *seed, int seed_len, | |
121 | unsigned char *out, int olen) | |
58964a49 RE |
122 | { |
123 | int chunk,n; | |
124 | unsigned int j; | |
125 | HMAC_CTX ctx; | |
126 | HMAC_CTX ctx_tmp; | |
54a656ef | 127 | unsigned char A1[EVP_MAX_MD_SIZE]; |
58964a49 RE |
128 | unsigned int A1_len; |
129 | ||
130 | chunk=EVP_MD_size(md); | |
131 | ||
dbad1690 BL |
132 | HMAC_CTX_init(&ctx); |
133 | HMAC_CTX_init(&ctx_tmp); | |
de941e28 DSH |
134 | HMAC_Init_ex(&ctx,sec,sec_len,md, NULL); |
135 | HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL); | |
58964a49 RE |
136 | HMAC_Update(&ctx,seed,seed_len); |
137 | HMAC_Final(&ctx,A1,&A1_len); | |
138 | ||
139 | n=0; | |
140 | for (;;) | |
141 | { | |
de941e28 DSH |
142 | HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */ |
143 | HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */ | |
58964a49 | 144 | HMAC_Update(&ctx,A1,A1_len); |
323f289c | 145 | HMAC_Update(&ctx_tmp,A1,A1_len); |
58964a49 RE |
146 | HMAC_Update(&ctx,seed,seed_len); |
147 | ||
148 | if (olen > chunk) | |
149 | { | |
150 | HMAC_Final(&ctx,out,&j); | |
151 | out+=j; | |
152 | olen-=j; | |
153 | HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ | |
154 | } | |
155 | else /* last one */ | |
156 | { | |
157 | HMAC_Final(&ctx,A1,&A1_len); | |
158 | memcpy(out,A1,olen); | |
159 | break; | |
160 | } | |
161 | } | |
dbad1690 BL |
162 | HMAC_CTX_cleanup(&ctx); |
163 | HMAC_CTX_cleanup(&ctx_tmp); | |
4579924b | 164 | OPENSSL_cleanse(A1,sizeof(A1)); |
58964a49 RE |
165 | } |
166 | ||
e4aac1cb | 167 | static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1, |
61f5b6f3 BL |
168 | unsigned char *label, int label_len, |
169 | const unsigned char *sec, int slen, unsigned char *out1, | |
170 | unsigned char *out2, int olen) | |
58964a49 RE |
171 | { |
172 | int len,i; | |
61f5b6f3 | 173 | const unsigned char *S1,*S2; |
58964a49 RE |
174 | |
175 | len=slen/2; | |
176 | S1=sec; | |
177 | S2= &(sec[len]); | |
178 | len+=(slen&1); /* add for odd, make longer */ | |
179 | ||
180 | ||
181 | tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); | |
182 | tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); | |
183 | ||
184 | for (i=0; i<olen; i++) | |
185 | out1[i]^=out2[i]; | |
186 | } | |
187 | ||
6b691a5c UM |
188 | static void tls1_generate_key_block(SSL *s, unsigned char *km, |
189 | unsigned char *tmp, int num) | |
58964a49 RE |
190 | { |
191 | unsigned char *p; | |
192 | unsigned char buf[SSL3_RANDOM_SIZE*2+ | |
193 | TLS_MD_MAX_CONST_SIZE]; | |
194 | p=buf; | |
195 | ||
196 | memcpy(p,TLS_MD_KEY_EXPANSION_CONST, | |
197 | TLS_MD_KEY_EXPANSION_CONST_SIZE); | |
198 | p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; | |
199 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
200 | p+=SSL3_RANDOM_SIZE; | |
201 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
202 | p+=SSL3_RANDOM_SIZE; | |
203 | ||
dfeab068 | 204 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), |
e4aac1cb BL |
205 | s->session->master_key,s->session->master_key_length, |
206 | km,tmp,num); | |
f9b3bff6 RL |
207 | #ifdef KSSL_DEBUG |
208 | printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", | |
209 | s->session->master_key_length); | |
210 | { | |
211 | int i; | |
212 | for (i=0; i < s->session->master_key_length; i++) | |
213 | { | |
214 | printf("%02X", s->session->master_key[i]); | |
215 | } | |
216 | printf("\n"); } | |
217 | #endif /* KSSL_DEBUG */ | |
58964a49 RE |
218 | } |
219 | ||
6b691a5c | 220 | int tls1_change_cipher_state(SSL *s, int which) |
58964a49 | 221 | { |
61f5b6f3 | 222 | static const unsigned char empty[]=""; |
58964a49 RE |
223 | unsigned char *p,*key_block,*mac_secret; |
224 | unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ | |
225 | SSL3_RANDOM_SIZE*2]; | |
226 | unsigned char tmp1[EVP_MAX_KEY_LENGTH]; | |
227 | unsigned char tmp2[EVP_MAX_KEY_LENGTH]; | |
228 | unsigned char iv1[EVP_MAX_IV_LENGTH*2]; | |
229 | unsigned char iv2[EVP_MAX_IV_LENGTH*2]; | |
230 | unsigned char *ms,*key,*iv,*er1,*er2; | |
231 | int client_write; | |
232 | EVP_CIPHER_CTX *dd; | |
e778802f | 233 | const EVP_CIPHER *c; |
09b6c2ef | 234 | #ifndef OPENSSL_NO_COMP |
e778802f | 235 | const SSL_COMP *comp; |
09b6c2ef | 236 | #endif |
e778802f | 237 | const EVP_MD *m; |
28797374 BM |
238 | int is_export,n,i,j,k,exp_label_len,cl; |
239 | int reuse_dd = 0; | |
58964a49 | 240 | |
28797374 | 241 | is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
58964a49 RE |
242 | c=s->s3->tmp.new_sym_enc; |
243 | m=s->s3->tmp.new_hash; | |
09b6c2ef | 244 | #ifndef OPENSSL_NO_COMP |
58964a49 | 245 | comp=s->s3->tmp.new_compression; |
09b6c2ef | 246 | #endif |
58964a49 RE |
247 | key_block=s->s3->tmp.key_block; |
248 | ||
f9b3bff6 RL |
249 | #ifdef KSSL_DEBUG |
250 | printf("tls1_change_cipher_state(which= %d) w/\n", which); | |
251 | printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms, | |
252 | comp); | |
253 | printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); | |
254 | printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", | |
255 | c->nid,c->block_size,c->key_len,c->iv_len); | |
256 | printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); | |
257 | { | |
258 | int i; | |
259 | for (i=0; i<s->s3->tmp.key_block_length; i++) | |
260 | printf("%02x", key_block[i]); printf("\n"); | |
261 | } | |
262 | #endif /* KSSL_DEBUG */ | |
263 | ||
58964a49 RE |
264 | if (which & SSL3_CC_READ) |
265 | { | |
28797374 BM |
266 | if (s->enc_read_ctx != NULL) |
267 | reuse_dd = 1; | |
268 | else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) | |
58964a49 RE |
269 | goto err; |
270 | dd= s->enc_read_ctx; | |
271 | s->read_hash=m; | |
09b6c2ef | 272 | #ifndef OPENSSL_NO_COMP |
dfeab068 RE |
273 | if (s->expand != NULL) |
274 | { | |
275 | COMP_CTX_free(s->expand); | |
276 | s->expand=NULL; | |
277 | } | |
278 | if (comp != NULL) | |
279 | { | |
413c4f45 | 280 | s->expand=COMP_CTX_new(comp->method); |
dfeab068 RE |
281 | if (s->expand == NULL) |
282 | { | |
283 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
284 | goto err2; | |
285 | } | |
413c4f45 MC |
286 | if (s->s3->rrec.comp == NULL) |
287 | s->s3->rrec.comp=(unsigned char *) | |
26a3a48d | 288 | OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); |
dfeab068 RE |
289 | if (s->s3->rrec.comp == NULL) |
290 | goto err; | |
291 | } | |
09b6c2ef | 292 | #endif |
36d16f8e BL |
293 | /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ |
294 | if (s->version != DTLS1_VERSION) | |
295 | memset(&(s->s3->read_sequence[0]),0,8); | |
58964a49 RE |
296 | mac_secret= &(s->s3->read_mac_secret[0]); |
297 | } | |
298 | else | |
299 | { | |
28797374 BM |
300 | if (s->enc_write_ctx != NULL) |
301 | reuse_dd = 1; | |
302 | else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) | |
303 | goto err; | |
58964a49 RE |
304 | if ((s->enc_write_ctx == NULL) && |
305 | ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
26a3a48d | 306 | OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) |
58964a49 RE |
307 | goto err; |
308 | dd= s->enc_write_ctx; | |
309 | s->write_hash=m; | |
09b6c2ef | 310 | #ifndef OPENSSL_NO_COMP |
dfeab068 RE |
311 | if (s->compress != NULL) |
312 | { | |
313 | COMP_CTX_free(s->compress); | |
314 | s->compress=NULL; | |
315 | } | |
316 | if (comp != NULL) | |
317 | { | |
413c4f45 | 318 | s->compress=COMP_CTX_new(comp->method); |
dfeab068 RE |
319 | if (s->compress == NULL) |
320 | { | |
321 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); | |
322 | goto err2; | |
323 | } | |
324 | } | |
09b6c2ef | 325 | #endif |
36d16f8e BL |
326 | /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ |
327 | if (s->version != DTLS1_VERSION) | |
328 | memset(&(s->s3->write_sequence[0]),0,8); | |
58964a49 RE |
329 | mac_secret= &(s->s3->write_mac_secret[0]); |
330 | } | |
331 | ||
28797374 BM |
332 | if (reuse_dd) |
333 | EVP_CIPHER_CTX_cleanup(dd); | |
58964a49 RE |
334 | EVP_CIPHER_CTX_init(dd); |
335 | ||
336 | p=s->s3->tmp.key_block; | |
337 | i=EVP_MD_size(m); | |
436d318c | 338 | cl=EVP_CIPHER_key_length(c); |
28797374 BM |
339 | j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
340 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; | |
436d318c | 341 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
58964a49 RE |
342 | k=EVP_CIPHER_iv_length(c); |
343 | er1= &(s->s3->client_random[0]); | |
344 | er2= &(s->s3->server_random[0]); | |
345 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
346 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) | |
347 | { | |
348 | ms= &(p[ 0]); n=i+i; | |
349 | key= &(p[ n]); n+=j+j; | |
350 | iv= &(p[ n]); n+=k+k; | |
351 | exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; | |
352 | exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; | |
353 | client_write=1; | |
354 | } | |
355 | else | |
356 | { | |
357 | n=i; | |
358 | ms= &(p[ n]); n+=i+j; | |
359 | key= &(p[ n]); n+=j+k; | |
360 | iv= &(p[ n]); n+=k; | |
361 | exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; | |
362 | exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; | |
363 | client_write=0; | |
364 | } | |
365 | ||
366 | if (n > s->s3->tmp.key_block_length) | |
367 | { | |
5277d7cb | 368 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); |
58964a49 RE |
369 | goto err2; |
370 | } | |
371 | ||
372 | memcpy(mac_secret,ms,i); | |
373 | #ifdef TLS_DEBUG | |
374 | printf("which = %04X\nmac key=",which); | |
375 | { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } | |
376 | #endif | |
28797374 | 377 | if (is_export) |
58964a49 RE |
378 | { |
379 | /* In here I set both the read and write key/iv to the | |
380 | * same value since only the correct one will be used :-). | |
381 | */ | |
382 | p=buf; | |
383 | memcpy(p,exp_label,exp_label_len); | |
384 | p+=exp_label_len; | |
385 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
386 | p+=SSL3_RANDOM_SIZE; | |
387 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
388 | p+=SSL3_RANDOM_SIZE; | |
dfeab068 | 389 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, |
06ab81f9 | 390 | tmp1,tmp2,EVP_CIPHER_key_length(c)); |
58964a49 RE |
391 | key=tmp1; |
392 | ||
393 | if (k > 0) | |
394 | { | |
395 | p=buf; | |
396 | memcpy(p,TLS_MD_IV_BLOCK_CONST, | |
397 | TLS_MD_IV_BLOCK_CONST_SIZE); | |
398 | p+=TLS_MD_IV_BLOCK_CONST_SIZE; | |
399 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); | |
400 | p+=SSL3_RANDOM_SIZE; | |
401 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
402 | p+=SSL3_RANDOM_SIZE; | |
61f5b6f3 BL |
403 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0, |
404 | iv1,iv2,k*2); | |
58964a49 RE |
405 | if (client_write) |
406 | iv=iv1; | |
407 | else | |
408 | iv= &(iv1[k]); | |
409 | } | |
410 | } | |
411 | ||
412 | s->session->key_arg_length=0; | |
f9b3bff6 RL |
413 | #ifdef KSSL_DEBUG |
414 | { | |
415 | int i; | |
581f1c84 | 416 | printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); |
f9b3bff6 RL |
417 | printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); |
418 | printf("\n"); | |
419 | printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); | |
420 | printf("\n"); | |
421 | } | |
422 | #endif /* KSSL_DEBUG */ | |
58964a49 | 423 | |
581f1c84 | 424 | EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); |
58964a49 RE |
425 | #ifdef TLS_DEBUG |
426 | printf("which = %04X\nkey=",which); | |
427 | { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } | |
428 | printf("\niv="); | |
429 | { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } | |
430 | printf("\n"); | |
431 | #endif | |
432 | ||
4579924b RL |
433 | OPENSSL_cleanse(tmp1,sizeof(tmp1)); |
434 | OPENSSL_cleanse(tmp2,sizeof(tmp1)); | |
435 | OPENSSL_cleanse(iv1,sizeof(iv1)); | |
436 | OPENSSL_cleanse(iv2,sizeof(iv2)); | |
58964a49 RE |
437 | return(1); |
438 | err: | |
439 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); | |
440 | err2: | |
441 | return(0); | |
442 | } | |
443 | ||
6b691a5c | 444 | int tls1_setup_key_block(SSL *s) |
58964a49 RE |
445 | { |
446 | unsigned char *p1,*p2; | |
e778802f BL |
447 | const EVP_CIPHER *c; |
448 | const EVP_MD *hash; | |
06ab81f9 | 449 | int num; |
413c4f45 | 450 | SSL_COMP *comp; |
58964a49 | 451 | |
f9b3bff6 RL |
452 | #ifdef KSSL_DEBUG |
453 | printf ("tls1_setup_key_block()\n"); | |
454 | #endif /* KSSL_DEBUG */ | |
455 | ||
58964a49 RE |
456 | if (s->s3->tmp.key_block_length != 0) |
457 | return(1); | |
458 | ||
413c4f45 | 459 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) |
58964a49 RE |
460 | { |
461 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
462 | return(0); | |
463 | } | |
464 | ||
465 | s->s3->tmp.new_sym_enc=c; | |
466 | s->s3->tmp.new_hash=hash; | |
467 | ||
58964a49 RE |
468 | num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); |
469 | num*=2; | |
470 | ||
471 | ssl3_cleanup_key_block(s); | |
472 | ||
26a3a48d | 473 | if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) |
58964a49 | 474 | goto err; |
26a3a48d | 475 | if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) |
58964a49 RE |
476 | goto err; |
477 | ||
478 | s->s3->tmp.key_block_length=num; | |
479 | s->s3->tmp.key_block=p1; | |
480 | ||
481 | ||
482 | #ifdef TLS_DEBUG | |
483 | printf("client random\n"); | |
484 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } | |
485 | printf("server random\n"); | |
486 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } | |
487 | printf("pre-master\n"); | |
488 | { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } | |
489 | #endif | |
490 | tls1_generate_key_block(s,p1,p2,num); | |
4579924b | 491 | OPENSSL_cleanse(p2,num); |
26a3a48d | 492 | OPENSSL_free(p2); |
58964a49 RE |
493 | #ifdef TLS_DEBUG |
494 | printf("\nkey block\n"); | |
495 | { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } | |
496 | #endif | |
497 | ||
c21506ba BM |
498 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) |
499 | { | |
500 | /* enable vulnerability countermeasure for CBC ciphers with | |
501 | * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
502 | */ | |
503 | s->s3->need_empty_fragments = 1; | |
504 | ||
d1d0be3c BM |
505 | if (s->session->cipher != NULL) |
506 | { | |
507 | if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL) | |
508 | s->s3->need_empty_fragments = 0; | |
509 | ||
510 | #ifndef OPENSSL_NO_RC4 | |
511 | if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4) | |
512 | s->s3->need_empty_fragments = 0; | |
82b0bf0b | 513 | #endif |
d1d0be3c | 514 | } |
c21506ba | 515 | } |
82b0bf0b | 516 | |
58964a49 RE |
517 | return(1); |
518 | err: | |
519 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); | |
520 | return(0); | |
521 | } | |
522 | ||
6b691a5c | 523 | int tls1_enc(SSL *s, int send) |
58964a49 RE |
524 | { |
525 | SSL3_RECORD *rec; | |
526 | EVP_CIPHER_CTX *ds; | |
527 | unsigned long l; | |
528 | int bs,i,ii,j,k,n=0; | |
e778802f | 529 | const EVP_CIPHER *enc; |
58964a49 RE |
530 | |
531 | if (send) | |
532 | { | |
533 | if (s->write_hash != NULL) | |
534 | n=EVP_MD_size(s->write_hash); | |
535 | ds=s->enc_write_ctx; | |
536 | rec= &(s->s3->wrec); | |
537 | if (s->enc_write_ctx == NULL) | |
dfeab068 | 538 | enc=NULL; |
58964a49 | 539 | else |
58964a49 | 540 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
58964a49 RE |
541 | } |
542 | else | |
543 | { | |
544 | if (s->read_hash != NULL) | |
545 | n=EVP_MD_size(s->read_hash); | |
546 | ds=s->enc_read_ctx; | |
547 | rec= &(s->s3->rrec); | |
548 | if (s->enc_read_ctx == NULL) | |
dfeab068 | 549 | enc=NULL; |
58964a49 | 550 | else |
58964a49 | 551 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
58964a49 RE |
552 | } |
553 | ||
f9b3bff6 RL |
554 | #ifdef KSSL_DEBUG |
555 | printf("tls1_enc(%d)\n", send); | |
556 | #endif /* KSSL_DEBUG */ | |
557 | ||
58964a49 | 558 | if ((s->session == NULL) || (ds == NULL) || |
dfeab068 | 559 | (enc == NULL)) |
58964a49 | 560 | { |
44e48abc | 561 | memmove(rec->data,rec->input,rec->length); |
58964a49 RE |
562 | rec->input=rec->data; |
563 | } | |
564 | else | |
565 | { | |
566 | l=rec->length; | |
567 | bs=EVP_CIPHER_block_size(ds->cipher); | |
568 | ||
569 | if ((bs != 1) && send) | |
570 | { | |
571 | i=bs-((int)l%bs); | |
572 | ||
573 | /* Add weird padding of upto 256 bytes */ | |
574 | ||
575 | /* we need to add 'i' padding bytes of value j */ | |
576 | j=i-1; | |
577 | if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) | |
578 | { | |
579 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
580 | j++; | |
581 | } | |
582 | for (k=(int)l; k<(int)(l+i); k++) | |
583 | rec->input[k]=j; | |
584 | l+=i; | |
585 | rec->length+=i; | |
586 | } | |
587 | ||
f9b3bff6 RL |
588 | #ifdef KSSL_DEBUG |
589 | { | |
45442167 | 590 | unsigned long ui; |
f9b3bff6 RL |
591 | printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", |
592 | ds,rec->data,rec->input,l); | |
593 | printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", | |
594 | ds->buf_len, ds->cipher->key_len, | |
595 | DES_KEY_SZ, DES_SCHEDULE_SZ, | |
596 | ds->cipher->iv_len); | |
597 | printf("\t\tIV: "); | |
598 | for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); | |
599 | printf("\n"); | |
600 | printf("\trec->input="); | |
45442167 | 601 | for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); |
f9b3bff6 RL |
602 | printf("\n"); |
603 | } | |
604 | #endif /* KSSL_DEBUG */ | |
605 | ||
285b4275 BM |
606 | if (!send) |
607 | { | |
608 | if (l == 0 || l%bs != 0) | |
609 | { | |
610 | SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); | |
ee60d9fb BM |
611 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); |
612 | return 0; | |
285b4275 BM |
613 | } |
614 | } | |
615 | ||
58964a49 RE |
616 | EVP_Cipher(ds,rec->data,rec->input,l); |
617 | ||
f9b3bff6 RL |
618 | #ifdef KSSL_DEBUG |
619 | { | |
620 | unsigned long i; | |
621 | printf("\trec->data="); | |
622 | for (i=0; i<l; i++) | |
623 | printf(" %02x", rec->data[i]); printf("\n"); | |
624 | } | |
625 | #endif /* KSSL_DEBUG */ | |
626 | ||
58964a49 RE |
627 | if ((bs != 1) && !send) |
628 | { | |
285b4275 | 629 | ii=i=rec->data[l-1]; /* padding_length */ |
58964a49 RE |
630 | i++; |
631 | if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) | |
632 | { | |
633 | /* First packet is even in size, so check */ | |
634 | if ((memcmp(s->s3->read_sequence, | |
635 | "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) | |
636 | s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; | |
637 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
638 | i--; | |
639 | } | |
285b4275 BM |
640 | /* TLS 1.0 does not bound the number of padding bytes by the block size. |
641 | * All of them must have value 'padding_length'. */ | |
58964a49 RE |
642 | if (i > (int)rec->length) |
643 | { | |
ee60d9fb BM |
644 | /* Incorrect padding. SSLerr() and ssl3_alert are done |
645 | * by caller: we don't want to reveal whether this is | |
965b6dad BM |
646 | * a decryption error or a MAC verification failure |
647 | * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ | |
ee60d9fb | 648 | return -1; |
58964a49 RE |
649 | } |
650 | for (j=(int)(l-i); j<(int)l; j++) | |
651 | { | |
652 | if (rec->data[j] != ii) | |
653 | { | |
ee60d9fb BM |
654 | /* Incorrect padding */ |
655 | return -1; | |
58964a49 RE |
656 | } |
657 | } | |
658 | rec->length-=i; | |
659 | } | |
660 | } | |
661 | return(1); | |
662 | } | |
663 | ||
6b691a5c | 664 | int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out) |
58964a49 RE |
665 | { |
666 | unsigned int ret; | |
667 | EVP_MD_CTX ctx; | |
668 | ||
dbad1690 | 669 | EVP_MD_CTX_init(&ctx); |
20d2186c DSH |
670 | EVP_MD_CTX_copy_ex(&ctx,in_ctx); |
671 | EVP_DigestFinal_ex(&ctx,out,&ret); | |
dbad1690 | 672 | EVP_MD_CTX_cleanup(&ctx); |
58964a49 RE |
673 | return((int)ret); |
674 | } | |
675 | ||
6b691a5c | 676 | int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx, |
245206ea | 677 | const char *str, int slen, unsigned char *out) |
58964a49 RE |
678 | { |
679 | unsigned int i; | |
680 | EVP_MD_CTX ctx; | |
681 | unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
682 | unsigned char *q,buf2[12]; | |
683 | ||
684 | q=buf; | |
685 | memcpy(q,str,slen); | |
686 | q+=slen; | |
687 | ||
dbad1690 | 688 | EVP_MD_CTX_init(&ctx); |
20d2186c DSH |
689 | EVP_MD_CTX_copy_ex(&ctx,in1_ctx); |
690 | EVP_DigestFinal_ex(&ctx,q,&i); | |
58964a49 | 691 | q+=i; |
20d2186c DSH |
692 | EVP_MD_CTX_copy_ex(&ctx,in2_ctx); |
693 | EVP_DigestFinal_ex(&ctx,q,&i); | |
58964a49 RE |
694 | q+=i; |
695 | ||
dfeab068 | 696 | tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), |
58964a49 | 697 | s->session->master_key,s->session->master_key_length, |
54a656ef | 698 | out,buf2,sizeof buf2); |
dbad1690 | 699 | EVP_MD_CTX_cleanup(&ctx); |
58964a49 | 700 | |
54a656ef | 701 | return sizeof buf2; |
58964a49 RE |
702 | } |
703 | ||
6b691a5c | 704 | int tls1_mac(SSL *ssl, unsigned char *md, int send) |
58964a49 RE |
705 | { |
706 | SSL3_RECORD *rec; | |
707 | unsigned char *mac_sec,*seq; | |
e778802f | 708 | const EVP_MD *hash; |
58964a49 RE |
709 | unsigned int md_size; |
710 | int i; | |
711 | HMAC_CTX hmac; | |
712 | unsigned char buf[5]; | |
713 | ||
714 | if (send) | |
715 | { | |
716 | rec= &(ssl->s3->wrec); | |
717 | mac_sec= &(ssl->s3->write_mac_secret[0]); | |
718 | seq= &(ssl->s3->write_sequence[0]); | |
719 | hash=ssl->write_hash; | |
720 | } | |
721 | else | |
722 | { | |
723 | rec= &(ssl->s3->rrec); | |
724 | mac_sec= &(ssl->s3->read_mac_secret[0]); | |
725 | seq= &(ssl->s3->read_sequence[0]); | |
726 | hash=ssl->read_hash; | |
727 | } | |
728 | ||
729 | md_size=EVP_MD_size(hash); | |
730 | ||
731 | buf[0]=rec->type; | |
732 | buf[1]=TLS1_VERSION_MAJOR; | |
733 | buf[2]=TLS1_VERSION_MINOR; | |
734 | buf[3]=rec->length>>8; | |
735 | buf[4]=rec->length&0xff; | |
736 | ||
737 | /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ | |
dbad1690 | 738 | HMAC_CTX_init(&hmac); |
de941e28 | 739 | HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL); |
58964a49 RE |
740 | HMAC_Update(&hmac,seq,8); |
741 | HMAC_Update(&hmac,buf,5); | |
742 | HMAC_Update(&hmac,rec->input,rec->length); | |
743 | HMAC_Final(&hmac,md,&md_size); | |
dbad1690 | 744 | HMAC_CTX_cleanup(&hmac); |
58964a49 RE |
745 | |
746 | #ifdef TLS_DEBUG | |
747 | printf("sec="); | |
dfeab068 | 748 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } |
58964a49 RE |
749 | printf("seq="); |
750 | {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } | |
751 | printf("buf="); | |
752 | {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } | |
753 | printf("rec="); | |
dfeab068 | 754 | {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } |
58964a49 RE |
755 | #endif |
756 | ||
36d16f8e BL |
757 | if ( SSL_version(ssl) != DTLS1_VERSION) |
758 | { | |
759 | for (i=7; i>=0; i--) | |
760 | { | |
761 | ++seq[i]; | |
762 | if (seq[i] != 0) break; | |
763 | } | |
1876cc32 | 764 | } |
58964a49 RE |
765 | |
766 | #ifdef TLS_DEBUG | |
dfeab068 | 767 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } |
58964a49 RE |
768 | #endif |
769 | return(md_size); | |
770 | } | |
771 | ||
6b691a5c UM |
772 | int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
773 | int len) | |
58964a49 RE |
774 | { |
775 | unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; | |
776 | unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; | |
777 | ||
f9b3bff6 RL |
778 | #ifdef KSSL_DEBUG |
779 | printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); | |
780 | #endif /* KSSL_DEBUG */ | |
781 | ||
58964a49 RE |
782 | /* Setup the stuff to munge */ |
783 | memcpy(buf,TLS_MD_MASTER_SECRET_CONST, | |
784 | TLS_MD_MASTER_SECRET_CONST_SIZE); | |
785 | memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
786 | s->s3->client_random,SSL3_RANDOM_SIZE); | |
787 | memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), | |
788 | s->s3->server_random,SSL3_RANDOM_SIZE); | |
789 | tls1_PRF(s->ctx->md5,s->ctx->sha1, | |
790 | buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, | |
54a656ef | 791 | s->session->master_key,buff,sizeof buff); |
f9b3bff6 RL |
792 | #ifdef KSSL_DEBUG |
793 | printf ("tls1_generate_master_secret() complete\n"); | |
794 | #endif /* KSSL_DEBUG */ | |
58964a49 RE |
795 | return(SSL3_MASTER_SECRET_SIZE); |
796 | } | |
797 | ||
6b691a5c | 798 | int tls1_alert_code(int code) |
58964a49 RE |
799 | { |
800 | switch (code) | |
801 | { | |
802 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); | |
803 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); | |
804 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); | |
805 | case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); | |
806 | case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); | |
807 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); | |
808 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); | |
809 | case SSL_AD_NO_CERTIFICATE: return(-1); | |
810 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); | |
811 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
812 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); | |
813 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); | |
814 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); | |
815 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); | |
816 | case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); | |
817 | case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); | |
818 | case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); | |
819 | case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); | |
657e60fa | 820 | case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); |
58964a49 RE |
821 | case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); |
822 | case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); | |
823 | case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); | |
657e60fa | 824 | case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); |
58964a49 | 825 | case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); |
36d16f8e BL |
826 | case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return |
827 | (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); | |
58964a49 RE |
828 | default: return(-1); |
829 | } | |
830 | } | |
831 |