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.]
60 #include <openssl/comp.h>
61 #include <openssl/md5.h>
62 #include <openssl/sha.h>
63 #include <openssl/evp.h>
64 #include <openssl/hmac.h>
67 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
68 int sec_len, unsigned char *seed, int seed_len,
69 unsigned char *out, int olen)
75 unsigned char A1[HMAC_MAX_MD_CBLOCK];
78 chunk=EVP_MD_size(md);
80 HMAC_Init(&ctx,sec,sec_len,md);
81 HMAC_Update(&ctx,seed,seed_len);
82 HMAC_Final(&ctx,A1,&A1_len);
87 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
88 HMAC_Update(&ctx,A1,A1_len);
89 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
90 HMAC_Update(&ctx,seed,seed_len);
94 HMAC_Final(&ctx,out,&j);
97 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
101 HMAC_Final(&ctx,A1,&A1_len);
107 HMAC_cleanup(&ctx_tmp);
108 memset(A1,0,sizeof(A1));
111 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
112 unsigned char *label, int label_len,
113 const unsigned char *sec, int slen, unsigned char *out1,
114 unsigned char *out2, int olen)
117 const unsigned char *S1,*S2;
122 len+=(slen&1); /* add for odd, make longer */
125 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
126 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
128 for (i=0; i<olen; i++)
132 static void tls1_generate_key_block(SSL *s, unsigned char *km,
133 unsigned char *tmp, int num)
136 unsigned char buf[SSL3_RANDOM_SIZE*2+
137 TLS_MD_MAX_CONST_SIZE];
140 memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
141 TLS_MD_KEY_EXPANSION_CONST_SIZE);
142 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
143 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
145 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
148 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
149 s->session->master_key,s->session->master_key_length,
153 int tls1_change_cipher_state(SSL *s, int which)
155 static const unsigned char empty[]="";
156 unsigned char *p,*key_block,*mac_secret;
157 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
159 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
160 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
161 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
162 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
163 unsigned char *ms,*key,*iv,*er1,*er2;
167 const SSL_COMP *comp;
169 int _exp,n,i,j,k,exp_label_len,cl;
171 _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
172 c=s->s3->tmp.new_sym_enc;
173 m=s->s3->tmp.new_hash;
174 comp=s->s3->tmp.new_compression;
175 key_block=s->s3->tmp.key_block;
177 if (which & SSL3_CC_READ)
179 if ((s->enc_read_ctx == NULL) &&
180 ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
181 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
185 if (s->expand != NULL)
187 COMP_CTX_free(s->expand);
192 s->expand=COMP_CTX_new(comp->method);
193 if (s->expand == NULL)
195 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
198 if (s->s3->rrec.comp == NULL)
199 s->s3->rrec.comp=(unsigned char *)
200 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
201 if (s->s3->rrec.comp == NULL)
204 memset(&(s->s3->read_sequence[0]),0,8);
205 mac_secret= &(s->s3->read_mac_secret[0]);
209 if ((s->enc_write_ctx == NULL) &&
210 ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
211 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
213 dd= s->enc_write_ctx;
215 if (s->compress != NULL)
217 COMP_CTX_free(s->compress);
222 s->compress=COMP_CTX_new(comp->method);
223 if (s->compress == NULL)
225 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
229 memset(&(s->s3->write_sequence[0]),0,8);
230 mac_secret= &(s->s3->write_mac_secret[0]);
233 EVP_CIPHER_CTX_init(dd);
235 p=s->s3->tmp.key_block;
237 cl=EVP_CIPHER_key_length(c);
238 j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
239 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
240 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
241 k=EVP_CIPHER_iv_length(c);
242 er1= &(s->s3->client_random[0]);
243 er2= &(s->s3->server_random[0]);
244 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
245 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
248 key= &(p[ n]); n+=j+j;
249 iv= &(p[ n]); n+=k+k;
250 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
251 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
257 ms= &(p[ n]); n+=i+j;
258 key= &(p[ n]); n+=j+k;
260 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
261 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
265 if (n > s->s3->tmp.key_block_length)
267 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
271 memcpy(mac_secret,ms,i);
273 printf("which = %04X\nmac key=",which);
274 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
278 /* In here I set both the read and write key/iv to the
279 * same value since only the correct one will be used :-).
282 memcpy(p,exp_label,exp_label_len);
284 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
286 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
288 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
289 tmp1,tmp2,EVP_CIPHER_key_length(c));
295 memcpy(p,TLS_MD_IV_BLOCK_CONST,
296 TLS_MD_IV_BLOCK_CONST_SIZE);
297 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
298 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
300 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
302 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
311 s->session->key_arg_length=0;
313 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
315 printf("which = %04X\nkey=",which);
316 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
318 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
322 memset(tmp1,0,sizeof(tmp1));
323 memset(tmp2,0,sizeof(tmp1));
324 memset(iv1,0,sizeof(iv1));
325 memset(iv2,0,sizeof(iv2));
328 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
333 int tls1_setup_key_block(SSL *s)
335 unsigned char *p1,*p2;
341 if (s->s3->tmp.key_block_length != 0)
344 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
346 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
350 s->s3->tmp.new_sym_enc=c;
351 s->s3->tmp.new_hash=hash;
353 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
356 ssl3_cleanup_key_block(s);
358 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
360 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
363 s->s3->tmp.key_block_length=num;
364 s->s3->tmp.key_block=p1;
368 printf("client random\n");
369 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
370 printf("server random\n");
371 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
372 printf("pre-master\n");
373 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
375 tls1_generate_key_block(s,p1,p2,num);
379 printf("\nkey block\n");
380 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
385 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
389 int tls1_enc(SSL *s, int send)
395 const EVP_CIPHER *enc;
399 if (s->write_hash != NULL)
400 n=EVP_MD_size(s->write_hash);
403 if (s->enc_write_ctx == NULL)
406 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
410 if (s->read_hash != NULL)
411 n=EVP_MD_size(s->read_hash);
414 if (s->enc_read_ctx == NULL)
417 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
420 if ((s->session == NULL) || (ds == NULL) ||
423 memcpy(rec->data,rec->input,rec->length);
424 rec->input=rec->data;
429 bs=EVP_CIPHER_block_size(ds->cipher);
431 if ((bs != 1) && send)
435 /* Add weird padding of upto 256 bytes */
437 /* we need to add 'i' padding bytes of value j */
439 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
441 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
444 for (k=(int)l; k<(int)(l+i); k++)
450 EVP_Cipher(ds,rec->data,rec->input,l);
452 if ((bs != 1) && !send)
456 if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
458 /* First packet is even in size, so check */
459 if ((memcmp(s->s3->read_sequence,
460 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
461 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
462 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
465 if (i > (int)rec->length)
467 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
468 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
471 for (j=(int)(l-i); j<(int)l; j++)
473 if (rec->data[j] != ii)
475 SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
476 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
486 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
491 EVP_MD_CTX_copy(&ctx,in_ctx);
492 EVP_DigestFinal(&ctx,out,&ret);
496 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
497 const char *str, int slen, unsigned char *out)
501 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
502 unsigned char *q,buf2[12];
508 EVP_MD_CTX_copy(&ctx,in1_ctx);
509 EVP_DigestFinal(&ctx,q,&i);
511 EVP_MD_CTX_copy(&ctx,in2_ctx);
512 EVP_DigestFinal(&ctx,q,&i);
515 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
516 s->session->master_key,s->session->master_key_length,
518 memset(&ctx,0,sizeof(EVP_MD_CTX));
523 int tls1_mac(SSL *ssl, unsigned char *md, int send)
526 unsigned char *mac_sec,*seq;
528 unsigned int md_size;
531 unsigned char buf[5];
535 rec= &(ssl->s3->wrec);
536 mac_sec= &(ssl->s3->write_mac_secret[0]);
537 seq= &(ssl->s3->write_sequence[0]);
538 hash=ssl->write_hash;
542 rec= &(ssl->s3->rrec);
543 mac_sec= &(ssl->s3->read_mac_secret[0]);
544 seq= &(ssl->s3->read_sequence[0]);
548 md_size=EVP_MD_size(hash);
551 buf[1]=TLS1_VERSION_MAJOR;
552 buf[2]=TLS1_VERSION_MINOR;
553 buf[3]=rec->length>>8;
554 buf[4]=rec->length&0xff;
556 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
557 HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
558 HMAC_Update(&hmac,seq,8);
559 HMAC_Update(&hmac,buf,5);
560 HMAC_Update(&hmac,rec->input,rec->length);
561 HMAC_Final(&hmac,md,&md_size);
565 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
567 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
569 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
571 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
578 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
583 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
586 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
587 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
589 /* Setup the stuff to munge */
590 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
591 TLS_MD_MASTER_SECRET_CONST_SIZE);
592 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
593 s->s3->client_random,SSL3_RANDOM_SIZE);
594 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
595 s->s3->server_random,SSL3_RANDOM_SIZE);
596 tls1_PRF(s->ctx->md5,s->ctx->sha1,
597 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
598 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
599 return(SSL3_MASTER_SECRET_SIZE);
602 int tls1_alert_code(int code)
606 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
607 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
608 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
609 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
610 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
611 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
612 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
613 case SSL_AD_NO_CERTIFICATE: return(-1);
614 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
615 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
616 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
617 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
618 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
619 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
620 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
621 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
622 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
623 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
624 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
625 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
626 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
627 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
628 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
629 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);