2 /* Copyright (C) 1995-1998 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.]
65 static void tls1_P_hash(md,sec,sec_len,seed,seed_len,out,olen)
78 unsigned char A1[HMAC_MAX_MD_CBLOCK];
81 chunk=EVP_MD_size(md);
83 HMAC_Init(&ctx,sec,sec_len,md);
84 HMAC_Update(&ctx,seed,seed_len);
85 HMAC_Final(&ctx,A1,&A1_len);
90 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
91 HMAC_Update(&ctx,A1,A1_len);
92 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
93 HMAC_Update(&ctx,seed,seed_len);
97 HMAC_Final(&ctx,out,&j);
100 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
104 HMAC_Final(&ctx,A1,&A1_len);
110 HMAC_cleanup(&ctx_tmp);
111 memset(A1,0,sizeof(A1));
114 static void tls1_PRF(md5,sha1,label,label_len,sec,slen,out1,out2,olen)
117 unsigned char *label;
126 unsigned char *S1,*S2;
131 len+=(slen&1); /* add for odd, make longer */
134 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
135 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
137 for (i=0; i<olen; i++)
141 static void tls1_generate_key_block(s,km,tmp,num)
143 unsigned char *km,*tmp;
147 unsigned char buf[SSL3_RANDOM_SIZE*2+
148 TLS_MD_MAX_CONST_SIZE];
151 memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
152 TLS_MD_KEY_EXPANSION_CONST_SIZE);
153 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
154 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
156 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
159 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
160 s->session->master_key,s->session->master_key_length,
164 int tls1_change_cipher_state(s,which)
168 unsigned char *p,*key_block,*mac_secret;
169 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
171 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
172 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
173 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
174 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
175 unsigned char *ms,*key,*iv,*er1,*er2;
181 int _exp,n,i,j,k,exp_label_len,cl;
183 _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
184 c=s->s3->tmp.new_sym_enc;
185 m=s->s3->tmp.new_hash;
186 comp=s->s3->tmp.new_compression;
187 key_block=s->s3->tmp.key_block;
189 if (which & SSL3_CC_READ)
191 if ((s->enc_read_ctx == NULL) &&
192 ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
193 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
197 if (s->expand != NULL)
199 COMP_CTX_free(s->expand);
204 s->expand=COMP_CTX_new(comp->method);
205 if (s->expand == NULL)
207 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
210 if (s->s3->rrec.comp == NULL)
211 s->s3->rrec.comp=(unsigned char *)
212 Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
213 if (s->s3->rrec.comp == NULL)
216 memset(&(s->s3->read_sequence[0]),0,8);
217 mac_secret= &(s->s3->read_mac_secret[0]);
221 if ((s->enc_write_ctx == NULL) &&
222 ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
223 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
225 dd= s->enc_write_ctx;
227 if (s->compress != NULL)
229 COMP_CTX_free(s->compress);
234 s->compress=COMP_CTX_new(comp->method);
235 if (s->compress == NULL)
237 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
241 memset(&(s->s3->write_sequence[0]),0,8);
242 mac_secret= &(s->s3->write_mac_secret[0]);
245 EVP_CIPHER_CTX_init(dd);
247 p=s->s3->tmp.key_block;
249 cl=EVP_CIPHER_key_length(c);
250 j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
251 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
252 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
253 k=EVP_CIPHER_iv_length(c);
254 er1= &(s->s3->client_random[0]);
255 er2= &(s->s3->server_random[0]);
256 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
257 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
260 key= &(p[ n]); n+=j+j;
261 iv= &(p[ n]); n+=k+k;
262 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
263 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
269 ms= &(p[ n]); n+=i+j;
270 key= &(p[ n]); n+=j+k;
272 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
273 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
277 if (n > s->s3->tmp.key_block_length)
279 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
283 memcpy(mac_secret,ms,i);
285 printf("which = %04X\nmac key=",which);
286 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
290 /* In here I set both the read and write key/iv to the
291 * same value since only the correct one will be used :-).
294 memcpy(p,exp_label,exp_label_len);
296 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
298 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
300 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
301 tmp1,tmp2,EVP_CIPHER_key_length(c));
307 memcpy(p,TLS_MD_IV_BLOCK_CONST,
308 TLS_MD_IV_BLOCK_CONST_SIZE);
309 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
310 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
312 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
314 tls1_PRF(s->ctx->md5,s->ctx->sha1,
315 buf,(int)(p-buf),"",0,iv1,iv2,k*2);
323 s->session->key_arg_length=0;
325 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
327 printf("which = %04X\nkey=",which);
328 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
330 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
334 memset(tmp1,0,sizeof(tmp1));
335 memset(tmp2,0,sizeof(tmp1));
336 memset(iv1,0,sizeof(iv1));
337 memset(iv2,0,sizeof(iv2));
340 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
345 int tls1_setup_key_block(s)
348 unsigned char *p1,*p2;
354 if (s->s3->tmp.key_block_length != 0)
357 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
359 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
363 s->s3->tmp.new_sym_enc=c;
364 s->s3->tmp.new_hash=hash;
366 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
369 ssl3_cleanup_key_block(s);
371 if ((p1=(unsigned char *)Malloc(num)) == NULL)
373 if ((p2=(unsigned char *)Malloc(num)) == NULL)
376 s->s3->tmp.key_block_length=num;
377 s->s3->tmp.key_block=p1;
381 printf("client random\n");
382 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
383 printf("server random\n");
384 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
385 printf("pre-master\n");
386 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
388 tls1_generate_key_block(s,p1,p2,num);
392 printf("\nkey block\n");
393 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
398 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
414 if (s->write_hash != NULL)
415 n=EVP_MD_size(s->write_hash);
418 if (s->enc_write_ctx == NULL)
421 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
425 if (s->read_hash != NULL)
426 n=EVP_MD_size(s->read_hash);
429 if (s->enc_read_ctx == NULL)
432 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
435 if ((s->session == NULL) || (ds == NULL) ||
438 memcpy(rec->data,rec->input,rec->length);
439 rec->input=rec->data;
444 bs=EVP_CIPHER_block_size(ds->cipher);
446 if ((bs != 1) && send)
450 /* Add weird padding of upto 256 bytes */
452 /* we need to add 'i' padding bytes of value j */
454 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
456 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
459 for (k=(int)l; k<(int)(l+i); k++)
465 EVP_Cipher(ds,rec->data,rec->input,l);
467 if ((bs != 1) && !send)
471 if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
473 /* First packet is even in size, so check */
474 if ((memcmp(s->s3->read_sequence,
475 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
476 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
477 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
480 if (i > (int)rec->length)
482 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
483 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
486 for (j=(int)(l-i); j<(int)l; j++)
488 if (rec->data[j] != ii)
490 SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
491 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
501 int tls1_cert_verify_mac(s,in_ctx,out)
509 EVP_MD_CTX_copy(&ctx,in_ctx);
510 EVP_DigestFinal(&ctx,out,&ret);
514 int tls1_final_finish_mac(s,in1_ctx,in2_ctx,str,slen,out)
516 EVP_MD_CTX *in1_ctx,*in2_ctx;
523 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
524 unsigned char *q,buf2[12];
530 EVP_MD_CTX_copy(&ctx,in1_ctx);
531 EVP_DigestFinal(&ctx,q,&i);
533 EVP_MD_CTX_copy(&ctx,in2_ctx);
534 EVP_DigestFinal(&ctx,q,&i);
537 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
538 s->session->master_key,s->session->master_key_length,
540 memset(&ctx,0,sizeof(EVP_MD_CTX));
545 int tls1_mac(ssl,md,send)
551 unsigned char *mac_sec,*seq;
553 unsigned int md_size;
556 unsigned char buf[5];
560 rec= &(ssl->s3->wrec);
561 mac_sec= &(ssl->s3->write_mac_secret[0]);
562 seq= &(ssl->s3->write_sequence[0]);
563 hash=ssl->write_hash;
567 rec= &(ssl->s3->rrec);
568 mac_sec= &(ssl->s3->read_mac_secret[0]);
569 seq= &(ssl->s3->read_sequence[0]);
573 md_size=EVP_MD_size(hash);
576 buf[1]=TLS1_VERSION_MAJOR;
577 buf[2]=TLS1_VERSION_MINOR;
578 buf[3]=rec->length>>8;
579 buf[4]=rec->length&0xff;
581 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
582 HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
583 HMAC_Update(&hmac,seq,8);
584 HMAC_Update(&hmac,buf,5);
585 HMAC_Update(&hmac,rec->input,rec->length);
586 HMAC_Final(&hmac,md,&md_size);
590 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
592 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
594 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
596 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
603 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
608 int tls1_generate_master_secret(s,out,p,len)
614 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
615 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
617 /* Setup the stuff to munge */
618 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
619 TLS_MD_MASTER_SECRET_CONST_SIZE);
620 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
621 s->s3->client_random,SSL3_RANDOM_SIZE);
622 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
623 s->s3->server_random,SSL3_RANDOM_SIZE);
624 tls1_PRF(s->ctx->md5,s->ctx->sha1,
625 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
626 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
627 return(SSL3_MASTER_SECRET_SIZE);
630 int tls1_alert_code(code)
635 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
636 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
637 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
638 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
639 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
640 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
641 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
642 case SSL_AD_NO_CERTIFICATE: return(-1);
643 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
644 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
645 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
646 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
647 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
648 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
649 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
650 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
651 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
652 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
653 case SSL_AD_EXPORT_RESTRICION: return(TLS1_AD_EXPORT_RESTRICION);
654 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
655 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
656 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
657 case SSL_AD_USER_CANCLED: return(TLS1_AD_USER_CANCLED);
658 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);