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(const EVP_MD *md, unsigned char *sec, int sec_len,
66 unsigned char *seed, int seed_len, unsigned char *out,
73 unsigned char A1[HMAC_MAX_MD_CBLOCK];
76 chunk=EVP_MD_size(md);
78 HMAC_Init(&ctx,sec,sec_len,md);
79 HMAC_Update(&ctx,seed,seed_len);
80 HMAC_Final(&ctx,A1,&A1_len);
85 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
86 HMAC_Update(&ctx,A1,A1_len);
87 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
88 HMAC_Update(&ctx,seed,seed_len);
92 HMAC_Final(&ctx,out,&j);
95 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
99 HMAC_Final(&ctx,A1,&A1_len);
105 HMAC_cleanup(&ctx_tmp);
106 memset(A1,0,sizeof(A1));
109 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
110 unsigned char *label, int label_len, unsigned char *sec,
111 int slen, unsigned char *out1, unsigned char *out2,
115 unsigned char *S1,*S2;
120 len+=(slen&1); /* add for odd, make longer */
123 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
124 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
126 for (i=0; i<olen; i++)
130 static void tls1_generate_key_block(SSL *s, unsigned char *km,
131 unsigned char *tmp, int num)
134 unsigned char buf[SSL3_RANDOM_SIZE*2+
135 TLS_MD_MAX_CONST_SIZE];
138 memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
139 TLS_MD_KEY_EXPANSION_CONST_SIZE);
140 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
141 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
143 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
146 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
147 s->session->master_key,s->session->master_key_length,
151 int tls1_change_cipher_state(SSL *s, int which)
153 unsigned char *p,*key_block,*mac_secret;
154 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
156 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
157 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
158 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
159 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
160 unsigned char *ms,*key,*iv,*er1,*er2;
164 const SSL_COMP *comp;
166 int _exp,n,i,j,k,exp_label_len,cl;
168 _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
169 c=s->s3->tmp.new_sym_enc;
170 m=s->s3->tmp.new_hash;
171 comp=s->s3->tmp.new_compression;
172 key_block=s->s3->tmp.key_block;
174 if (which & SSL3_CC_READ)
176 if ((s->enc_read_ctx == NULL) &&
177 ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
178 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
182 if (s->expand != NULL)
184 COMP_CTX_free(s->expand);
189 s->expand=COMP_CTX_new(comp->method);
190 if (s->expand == NULL)
192 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
195 if (s->s3->rrec.comp == NULL)
196 s->s3->rrec.comp=(unsigned char *)
197 Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
198 if (s->s3->rrec.comp == NULL)
201 memset(&(s->s3->read_sequence[0]),0,8);
202 mac_secret= &(s->s3->read_mac_secret[0]);
206 if ((s->enc_write_ctx == NULL) &&
207 ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
208 Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
210 dd= s->enc_write_ctx;
212 if (s->compress != NULL)
214 COMP_CTX_free(s->compress);
219 s->compress=COMP_CTX_new(comp->method);
220 if (s->compress == NULL)
222 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
226 memset(&(s->s3->write_sequence[0]),0,8);
227 mac_secret= &(s->s3->write_mac_secret[0]);
230 EVP_CIPHER_CTX_init(dd);
232 p=s->s3->tmp.key_block;
234 cl=EVP_CIPHER_key_length(c);
235 j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
236 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
237 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
238 k=EVP_CIPHER_iv_length(c);
239 er1= &(s->s3->client_random[0]);
240 er2= &(s->s3->server_random[0]);
241 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
242 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
245 key= &(p[ n]); n+=j+j;
246 iv= &(p[ n]); n+=k+k;
247 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
248 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
254 ms= &(p[ n]); n+=i+j;
255 key= &(p[ n]); n+=j+k;
257 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
258 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
262 if (n > s->s3->tmp.key_block_length)
264 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
268 memcpy(mac_secret,ms,i);
270 printf("which = %04X\nmac key=",which);
271 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
275 /* In here I set both the read and write key/iv to the
276 * same value since only the correct one will be used :-).
279 memcpy(p,exp_label,exp_label_len);
281 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
283 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
285 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
286 tmp1,tmp2,EVP_CIPHER_key_length(c));
292 memcpy(p,TLS_MD_IV_BLOCK_CONST,
293 TLS_MD_IV_BLOCK_CONST_SIZE);
294 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
295 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
297 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
299 tls1_PRF(s->ctx->md5,s->ctx->sha1,
300 buf,(int)(p-buf),"",0,iv1,iv2,k*2);
308 s->session->key_arg_length=0;
310 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
312 printf("which = %04X\nkey=",which);
313 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
315 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
319 memset(tmp1,0,sizeof(tmp1));
320 memset(tmp2,0,sizeof(tmp1));
321 memset(iv1,0,sizeof(iv1));
322 memset(iv2,0,sizeof(iv2));
325 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
330 int tls1_setup_key_block(SSL *s)
332 unsigned char *p1,*p2;
338 if (s->s3->tmp.key_block_length != 0)
341 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
343 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
347 s->s3->tmp.new_sym_enc=c;
348 s->s3->tmp.new_hash=hash;
350 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
353 ssl3_cleanup_key_block(s);
355 if ((p1=(unsigned char *)Malloc(num)) == NULL)
357 if ((p2=(unsigned char *)Malloc(num)) == NULL)
360 s->s3->tmp.key_block_length=num;
361 s->s3->tmp.key_block=p1;
365 printf("client random\n");
366 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
367 printf("server random\n");
368 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
369 printf("pre-master\n");
370 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
372 tls1_generate_key_block(s,p1,p2,num);
376 printf("\nkey block\n");
377 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
382 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
386 int tls1_enc(SSL *s, int send)
392 const EVP_CIPHER *enc;
396 if (s->write_hash != NULL)
397 n=EVP_MD_size(s->write_hash);
400 if (s->enc_write_ctx == NULL)
403 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
407 if (s->read_hash != NULL)
408 n=EVP_MD_size(s->read_hash);
411 if (s->enc_read_ctx == NULL)
414 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
417 if ((s->session == NULL) || (ds == NULL) ||
420 memcpy(rec->data,rec->input,rec->length);
421 rec->input=rec->data;
426 bs=EVP_CIPHER_block_size(ds->cipher);
428 if ((bs != 1) && send)
432 /* Add weird padding of upto 256 bytes */
434 /* we need to add 'i' padding bytes of value j */
436 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
438 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
441 for (k=(int)l; k<(int)(l+i); k++)
447 EVP_Cipher(ds,rec->data,rec->input,l);
449 if ((bs != 1) && !send)
453 if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
455 /* First packet is even in size, so check */
456 if ((memcmp(s->s3->read_sequence,
457 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
458 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
459 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
462 if (i > (int)rec->length)
464 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
465 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
468 for (j=(int)(l-i); j<(int)l; j++)
470 if (rec->data[j] != ii)
472 SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
483 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
488 EVP_MD_CTX_copy(&ctx,in_ctx);
489 EVP_DigestFinal(&ctx,out,&ret);
493 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
494 unsigned char *str, int slen, unsigned char *out)
498 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
499 unsigned char *q,buf2[12];
505 EVP_MD_CTX_copy(&ctx,in1_ctx);
506 EVP_DigestFinal(&ctx,q,&i);
508 EVP_MD_CTX_copy(&ctx,in2_ctx);
509 EVP_DigestFinal(&ctx,q,&i);
512 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
513 s->session->master_key,s->session->master_key_length,
515 memset(&ctx,0,sizeof(EVP_MD_CTX));
520 int tls1_mac(SSL *ssl, unsigned char *md, int send)
523 unsigned char *mac_sec,*seq;
525 unsigned int md_size;
528 unsigned char buf[5];
532 rec= &(ssl->s3->wrec);
533 mac_sec= &(ssl->s3->write_mac_secret[0]);
534 seq= &(ssl->s3->write_sequence[0]);
535 hash=ssl->write_hash;
539 rec= &(ssl->s3->rrec);
540 mac_sec= &(ssl->s3->read_mac_secret[0]);
541 seq= &(ssl->s3->read_sequence[0]);
545 md_size=EVP_MD_size(hash);
548 buf[1]=TLS1_VERSION_MAJOR;
549 buf[2]=TLS1_VERSION_MINOR;
550 buf[3]=rec->length>>8;
551 buf[4]=rec->length&0xff;
553 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
554 HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
555 HMAC_Update(&hmac,seq,8);
556 HMAC_Update(&hmac,buf,5);
557 HMAC_Update(&hmac,rec->input,rec->length);
558 HMAC_Final(&hmac,md,&md_size);
562 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
564 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
566 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
568 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
575 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
580 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
583 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
584 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
586 /* Setup the stuff to munge */
587 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
588 TLS_MD_MASTER_SECRET_CONST_SIZE);
589 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
590 s->s3->client_random,SSL3_RANDOM_SIZE);
591 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
592 s->s3->server_random,SSL3_RANDOM_SIZE);
593 tls1_PRF(s->ctx->md5,s->ctx->sha1,
594 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
595 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
596 return(SSL3_MASTER_SECRET_SIZE);
599 int tls1_alert_code(int code)
603 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
604 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
605 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
606 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
607 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
608 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
609 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
610 case SSL_AD_NO_CERTIFICATE: return(-1);
611 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
612 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
613 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
614 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
615 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
616 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
617 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
618 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
619 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
620 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
621 case SSL_AD_EXPORT_RESTRICION: return(TLS1_AD_EXPORT_RESTRICION);
622 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
623 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
624 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
625 case SSL_AD_USER_CANCLED: return(TLS1_AD_USER_CANCLED);
626 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);