2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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 };
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 };
79 int ssl3_change_cipher_state(s,which)
83 unsigned char *p,*key_block,*mac_secret;
84 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
85 unsigned char exp_iv[EVP_MAX_KEY_LENGTH];
86 unsigned char *ms,*key,*iv,*er1,*er2;
89 SSL_COMPRESSION *comp;
94 exp=(s->s3->tmp.new_cipher->algorithms & SSL_EXPORT)?1:0;
95 c=s->s3->tmp.new_sym_enc;
96 m=s->s3->tmp.new_hash;
97 comp=s->s3->tmp.new_compression;
98 key_block=s->s3->tmp.key_block;
100 if (which & SSL3_CC_READ)
102 if ((s->enc_read_ctx == NULL) &&
103 ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
104 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
108 s->read_compression=comp;
109 memset(&(s->s3->read_sequence[0]),0,8);
110 mac_secret= &(s->s3->read_mac_secret[0]);
114 if ((s->enc_write_ctx == NULL) &&
115 ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
116 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
118 dd= s->enc_write_ctx;
120 s->write_compression=comp;
121 memset(&(s->s3->write_sequence[0]),0,8);
122 mac_secret= &(s->s3->write_mac_secret[0]);
125 p=s->s3->tmp.key_block;
127 j=(exp)?5:EVP_CIPHER_key_length(c);
128 k=EVP_CIPHER_iv_length(c);
129 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
130 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
133 key= &(p[ n]); n+=j+j;
134 iv= &(p[ n]); n+=k+k;
135 er1= &(s->s3->client_random[0]);
136 er2= &(s->s3->server_random[0]);
141 ms= &(p[ n]); n+=i+j;
142 key= &(p[ n]); n+=j+k;
144 er1= &(s->s3->server_random[0]);
145 er2= &(s->s3->client_random[0]);
148 if (n > s->s3->tmp.key_block_length)
150 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
154 memcpy(mac_secret,ms,i);
157 /* In here I set both the read and write key/iv to the
158 * same value since only the correct one will be used :-).
161 MD5_Update(&md,key,j);
162 MD5_Update(&md,er1,SSL3_RANDOM_SIZE);
163 MD5_Update(&md,er2,SSL3_RANDOM_SIZE);
164 MD5_Final(&(exp_key[0]),&md);
168 MD5_Update(&md,er1,SSL3_RANDOM_SIZE);
169 MD5_Update(&md,er2,SSL3_RANDOM_SIZE);
170 MD5_Final(&(exp_iv[0]),&md);
174 s->session->key_arg_length=k;
176 memcpy(&(s->session->key_arg[0]),iv,k);
178 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
179 memset(&(exp_key[0]),0,sizeof(exp_key));
180 memset(&(exp_iv[0]),0,sizeof(exp_iv));
183 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
188 int ssl3_setup_key_block(s)
196 if (s->s3->tmp.key_block_length != 0)
199 if (!ssl_cipher_get_evp(s->session->cipher,&c,&hash))
201 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
205 s->s3->tmp.new_sym_enc=c;
206 s->s3->tmp.new_hash=hash;
208 exp=(s->session->cipher->algorithms & SSL_EXPORT)?1:0;
210 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
213 ssl3_cleanup_key_block(s);
215 if ((p=(unsigned char *)Malloc(num)) == NULL)
218 s->s3->tmp.key_block_length=num;
219 s->s3->tmp.key_block=p;
221 ssl3_generate_key_block(s,p,num);
225 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
229 void ssl3_cleanup_key_block(s)
232 if (s->s3->tmp.key_block != NULL)
234 memset(s->s3->tmp.key_block,0,
235 s->s3->tmp.key_block_length);
236 Free(s->s3->tmp.key_block);
237 s->s3->tmp.key_block=NULL;
239 s->s3->tmp.key_block_length=0;
251 SSL_COMPRESSION *comp;
257 if (s->enc_write_ctx == NULL)
258 { enc=NULL; comp=NULL; }
261 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
262 comp=s->write_compression;
269 if (s->enc_read_ctx == NULL)
270 { enc=NULL; comp=NULL; }
273 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
274 comp=s->read_compression;
278 if ((s->session == NULL) || (ds == NULL) ||
279 ((enc == NULL) && (comp == NULL)))
281 memcpy(rec->data,rec->input,rec->length);
282 rec->input=rec->data;
287 bs=EVP_CIPHER_block_size(ds->cipher);
289 /* This should be using (bs-1) and bs instead of 7 and 8 */
290 if ((bs != 1) && send)
294 /* we need to add 'i-1' padding bytes */
297 rec->input[l-1]=(i-1);
300 EVP_Cipher(ds,rec->data,rec->input,l);
302 if ((bs != 1) && !send)
307 SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
308 ssl3_send_alert(s,SSL3_AL_FATAL,SSL3_AD_BAD_RECORD_MAC);
317 void ssl3_init_finished_mac(s)
320 EVP_DigestInit(&(s->s3->finish_dgst1),EVP_md5());
321 EVP_DigestInit(&(s->s3->finish_dgst2),EVP_sha1());
324 void ssl3_finish_mac(s,buf,len)
329 EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len);
330 EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len);
333 int ssl3_final_finish_mac(s,in_ctx,sender,p)
336 unsigned char *sender;
342 unsigned char md_buf[EVP_MAX_MD_SIZE];
345 memcpy(&ctx,in_ctx,sizeof(EVP_MD_CTX));
347 n=EVP_MD_CTX_size(&ctx);
351 EVP_DigestUpdate(&ctx,sender,4);
352 EVP_DigestUpdate(&ctx,s->session->master_key,
353 s->session->master_key_length);
354 EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
355 EVP_DigestFinal(&ctx,md_buf,&i);
357 EVP_DigestInit(&ctx,EVP_MD_CTX_type(&ctx));
358 EVP_DigestUpdate(&ctx,s->session->master_key,
359 s->session->master_key_length);
360 EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
361 EVP_DigestUpdate(&ctx,md_buf,i);
362 EVP_DigestFinal(&ctx,p,&ret);
364 memset(&ctx,0,sizeof(EVP_MD_CTX));
369 int ssl3_mac(ssl,md,send)
375 unsigned char *mac_sec,*seq;
378 unsigned char *p,rec_char;
379 unsigned int md_size;
384 rec= &(ssl->s3->wrec);
385 mac_sec= &(ssl->s3->write_mac_secret[0]);
386 seq= &(ssl->s3->write_sequence[0]);
387 hash=ssl->write_hash;
391 rec= &(ssl->s3->rrec);
392 mac_sec= &(ssl->s3->read_mac_secret[0]);
393 seq= &(ssl->s3->read_sequence[0]);
397 md_size=EVP_MD_size(hash);
398 npad=(48/md_size)*md_size;
401 printf("npad=%d md_size=%d",npad,md_size);
403 for (i=0; i<md_size; i++) printf("%02X ",mac_sec[i]);
405 for (i=0; i<npad; i++) printf("%02X ",ssl3_pad_1[i]);
407 for (i=0; i<8; i++) printf("%02X ",seq[i]);
408 printf("\nreqt=%02X len=%04X\n",rec->type,rec->length);
409 for (i=0; i<rec->length; i++) printf("%02X",rec->input[i]);
413 /* Chop the digest off the end :-) */
415 EVP_DigestInit( &md_ctx,hash);
416 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
417 EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
418 EVP_DigestUpdate(&md_ctx,seq,8);
420 EVP_DigestUpdate(&md_ctx,&rec_char,1);
423 EVP_DigestUpdate(&md_ctx,md,2);
424 EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
425 EVP_DigestFinal( &md_ctx,md,NULL);
427 EVP_DigestInit( &md_ctx,hash);
428 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
429 EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
430 EVP_DigestUpdate(&md_ctx,md,md_size);
431 EVP_DigestFinal( &md_ctx,md,&md_size);
438 for (i=0; i<md_size; i++) printf("%02X ",md[i]);
445 int ssl3_generate_master_secret(s,out,p,len)
451 static unsigned char *salt[3]={
452 (unsigned char *)"A",
453 (unsigned char *)"BB",
454 (unsigned char *)"CCC",
456 unsigned char buf[EVP_MAX_MD_SIZE];
463 EVP_DigestInit(&ctx,EVP_sha1());
464 EVP_DigestUpdate(&ctx,salt[i],strlen((char *)salt[i]));
465 EVP_DigestUpdate(&ctx,p,len);
466 EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
468 EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
470 EVP_DigestFinal(&ctx,buf,&n);
472 EVP_DigestInit(&ctx,EVP_md5());
473 EVP_DigestUpdate(&ctx,p,len);
474 EVP_DigestUpdate(&ctx,buf,n);
475 EVP_DigestFinal(&ctx,out,&n);