t1_enc.c revision 215697
155714Skris/* ssl/t1_enc.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 58100928Snectar/* ==================================================================== 59100928Snectar * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. 60100928Snectar * 61100928Snectar * Redistribution and use in source and binary forms, with or without 62100928Snectar * modification, are permitted provided that the following conditions 63100928Snectar * are met: 64100928Snectar * 65100928Snectar * 1. Redistributions of source code must retain the above copyright 66100928Snectar * notice, this list of conditions and the following disclaimer. 67100928Snectar * 68100928Snectar * 2. Redistributions in binary form must reproduce the above copyright 69100928Snectar * notice, this list of conditions and the following disclaimer in 70100928Snectar * the documentation and/or other materials provided with the 71100928Snectar * distribution. 72100928Snectar * 73100928Snectar * 3. All advertising materials mentioning features or use of this 74100928Snectar * software must display the following acknowledgment: 75100928Snectar * "This product includes software developed by the OpenSSL Project 76100928Snectar * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77100928Snectar * 78100928Snectar * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79100928Snectar * endorse or promote products derived from this software without 80100928Snectar * prior written permission. For written permission, please contact 81100928Snectar * openssl-core@openssl.org. 82100928Snectar * 83100928Snectar * 5. Products derived from this software may not be called "OpenSSL" 84100928Snectar * nor may "OpenSSL" appear in their names without prior written 85100928Snectar * permission of the OpenSSL Project. 86100928Snectar * 87100928Snectar * 6. Redistributions of any form whatsoever must retain the following 88100928Snectar * acknowledgment: 89100928Snectar * "This product includes software developed by the OpenSSL Project 90100928Snectar * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91100928Snectar * 92100928Snectar * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93100928Snectar * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94100928Snectar * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95100928Snectar * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96100928Snectar * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97100928Snectar * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98100928Snectar * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99100928Snectar * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100100928Snectar * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101100928Snectar * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102100928Snectar * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103100928Snectar * OF THE POSSIBILITY OF SUCH DAMAGE. 104100928Snectar * ==================================================================== 105100928Snectar * 106100928Snectar * This product includes cryptographic software written by Eric Young 107100928Snectar * (eay@cryptsoft.com). This product includes software written by Tim 108100928Snectar * Hudson (tjh@cryptsoft.com). 109100928Snectar * 110100928Snectar */ 11155714Skris 11255714Skris#include <stdio.h> 113109998Smarkm#include "ssl_locl.h" 114194206Ssimon#ifndef OPENSSL_NO_COMP 11555714Skris#include <openssl/comp.h> 116194206Ssimon#endif 11755714Skris#include <openssl/evp.h> 11855714Skris#include <openssl/hmac.h> 119109998Smarkm#include <openssl/md5.h> 120194206Ssimon#ifdef KSSL_DEBUG 121194206Ssimon#include <openssl/des.h> 122194206Ssimon#endif 12355714Skris 12455714Skrisstatic void tls1_P_hash(const EVP_MD *md, const unsigned char *sec, 12555714Skris int sec_len, unsigned char *seed, int seed_len, 12655714Skris unsigned char *out, int olen) 12755714Skris { 128215697Ssimon int chunk; 12955714Skris unsigned int j; 13055714Skris HMAC_CTX ctx; 13155714Skris HMAC_CTX ctx_tmp; 132109998Smarkm unsigned char A1[EVP_MAX_MD_SIZE]; 13355714Skris unsigned int A1_len; 13455714Skris 13555714Skris chunk=EVP_MD_size(md); 13655714Skris 137109998Smarkm HMAC_CTX_init(&ctx); 138109998Smarkm HMAC_CTX_init(&ctx_tmp); 139194206Ssimon HMAC_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 140194206Ssimon HMAC_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 141109998Smarkm HMAC_Init_ex(&ctx,sec,sec_len,md, NULL); 142109998Smarkm HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL); 14355714Skris HMAC_Update(&ctx,seed,seed_len); 14455714Skris HMAC_Final(&ctx,A1,&A1_len); 14555714Skris 14655714Skris for (;;) 14755714Skris { 148109998Smarkm HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */ 149109998Smarkm HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */ 15055714Skris HMAC_Update(&ctx,A1,A1_len); 151109998Smarkm HMAC_Update(&ctx_tmp,A1,A1_len); 15255714Skris HMAC_Update(&ctx,seed,seed_len); 15355714Skris 15455714Skris if (olen > chunk) 15555714Skris { 15655714Skris HMAC_Final(&ctx,out,&j); 15755714Skris out+=j; 15855714Skris olen-=j; 15955714Skris HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ 16055714Skris } 16155714Skris else /* last one */ 16255714Skris { 16355714Skris HMAC_Final(&ctx,A1,&A1_len); 16455714Skris memcpy(out,A1,olen); 16555714Skris break; 16655714Skris } 16755714Skris } 168109998Smarkm HMAC_CTX_cleanup(&ctx); 169109998Smarkm HMAC_CTX_cleanup(&ctx_tmp); 170109998Smarkm OPENSSL_cleanse(A1,sizeof(A1)); 17155714Skris } 17255714Skris 17355714Skrisstatic void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1, 17455714Skris unsigned char *label, int label_len, 17555714Skris const unsigned char *sec, int slen, unsigned char *out1, 17655714Skris unsigned char *out2, int olen) 17755714Skris { 17855714Skris int len,i; 17955714Skris const unsigned char *S1,*S2; 18055714Skris 18155714Skris len=slen/2; 18255714Skris S1=sec; 18355714Skris S2= &(sec[len]); 18455714Skris len+=(slen&1); /* add for odd, make longer */ 18555714Skris 186160814Ssimon 18755714Skris tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); 18855714Skris tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); 18955714Skris 19055714Skris for (i=0; i<olen; i++) 19155714Skris out1[i]^=out2[i]; 19255714Skris } 19355714Skris 19455714Skrisstatic void tls1_generate_key_block(SSL *s, unsigned char *km, 19555714Skris unsigned char *tmp, int num) 19655714Skris { 19755714Skris unsigned char *p; 19855714Skris unsigned char buf[SSL3_RANDOM_SIZE*2+ 19955714Skris TLS_MD_MAX_CONST_SIZE]; 20055714Skris p=buf; 20155714Skris 20255714Skris memcpy(p,TLS_MD_KEY_EXPANSION_CONST, 20355714Skris TLS_MD_KEY_EXPANSION_CONST_SIZE); 20455714Skris p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; 20555714Skris memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 20655714Skris p+=SSL3_RANDOM_SIZE; 20755714Skris memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 20855714Skris p+=SSL3_RANDOM_SIZE; 20955714Skris 21055714Skris tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), 21155714Skris s->session->master_key,s->session->master_key_length, 21255714Skris km,tmp,num); 213109998Smarkm#ifdef KSSL_DEBUG 214109998Smarkm printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", 215109998Smarkm s->session->master_key_length); 216109998Smarkm { 217109998Smarkm int i; 218109998Smarkm for (i=0; i < s->session->master_key_length; i++) 219109998Smarkm { 220109998Smarkm printf("%02X", s->session->master_key[i]); 221109998Smarkm } 222109998Smarkm printf("\n"); } 223109998Smarkm#endif /* KSSL_DEBUG */ 22455714Skris } 22555714Skris 22655714Skrisint tls1_change_cipher_state(SSL *s, int which) 22755714Skris { 22855714Skris static const unsigned char empty[]=""; 229215697Ssimon unsigned char *p,*mac_secret; 23055714Skris unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ 23155714Skris SSL3_RANDOM_SIZE*2]; 23255714Skris unsigned char tmp1[EVP_MAX_KEY_LENGTH]; 23355714Skris unsigned char tmp2[EVP_MAX_KEY_LENGTH]; 23455714Skris unsigned char iv1[EVP_MAX_IV_LENGTH*2]; 23555714Skris unsigned char iv2[EVP_MAX_IV_LENGTH*2]; 236215697Ssimon unsigned char *ms,*key,*iv; 23755714Skris int client_write; 23855714Skris EVP_CIPHER_CTX *dd; 23955714Skris const EVP_CIPHER *c; 240160814Ssimon#ifndef OPENSSL_NO_COMP 24155714Skris const SSL_COMP *comp; 242160814Ssimon#endif 24355714Skris const EVP_MD *m; 244109998Smarkm int is_export,n,i,j,k,exp_label_len,cl; 245109998Smarkm int reuse_dd = 0; 24655714Skris 247109998Smarkm is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); 24855714Skris c=s->s3->tmp.new_sym_enc; 24955714Skris m=s->s3->tmp.new_hash; 250160814Ssimon#ifndef OPENSSL_NO_COMP 25155714Skris comp=s->s3->tmp.new_compression; 252160814Ssimon#endif 253215697Ssimon 254215697Ssimon#ifdef KSSL_DEBUG 25555714Skris key_block=s->s3->tmp.key_block; 25655714Skris 257109998Smarkm printf("tls1_change_cipher_state(which= %d) w/\n", which); 258109998Smarkm printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms, 259194206Ssimon (void *)comp); 260194206Ssimon printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", (void *)c); 261109998Smarkm printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", 262109998Smarkm c->nid,c->block_size,c->key_len,c->iv_len); 263109998Smarkm printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); 264109998Smarkm { 265194206Ssimon int ki; 266194206Ssimon for (ki=0; ki<s->s3->tmp.key_block_length; ki++) 267194206Ssimon printf("%02x", key_block[ki]); printf("\n"); 268109998Smarkm } 269109998Smarkm#endif /* KSSL_DEBUG */ 270109998Smarkm 27155714Skris if (which & SSL3_CC_READ) 27255714Skris { 273109998Smarkm if (s->enc_read_ctx != NULL) 274109998Smarkm reuse_dd = 1; 275109998Smarkm else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 27655714Skris goto err; 277167612Ssimon else 278167612Ssimon /* make sure it's intialized in case we exit later with an error */ 279167612Ssimon EVP_CIPHER_CTX_init(s->enc_read_ctx); 28055714Skris dd= s->enc_read_ctx; 28155714Skris s->read_hash=m; 282160814Ssimon#ifndef OPENSSL_NO_COMP 28355714Skris if (s->expand != NULL) 28455714Skris { 28555714Skris COMP_CTX_free(s->expand); 28655714Skris s->expand=NULL; 28755714Skris } 28855714Skris if (comp != NULL) 28955714Skris { 29055714Skris s->expand=COMP_CTX_new(comp->method); 29155714Skris if (s->expand == NULL) 29255714Skris { 29355714Skris SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 29455714Skris goto err2; 29555714Skris } 29655714Skris if (s->s3->rrec.comp == NULL) 29755714Skris s->s3->rrec.comp=(unsigned char *) 29868651Skris OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 29955714Skris if (s->s3->rrec.comp == NULL) 30055714Skris goto err; 30155714Skris } 302160814Ssimon#endif 303160814Ssimon /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 304160814Ssimon if (s->version != DTLS1_VERSION) 305160814Ssimon memset(&(s->s3->read_sequence[0]),0,8); 30655714Skris mac_secret= &(s->s3->read_mac_secret[0]); 30755714Skris } 30855714Skris else 30955714Skris { 310109998Smarkm if (s->enc_write_ctx != NULL) 311109998Smarkm reuse_dd = 1; 312109998Smarkm else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 313109998Smarkm goto err; 314167612Ssimon else 315167612Ssimon /* make sure it's intialized in case we exit later with an error */ 316167612Ssimon EVP_CIPHER_CTX_init(s->enc_write_ctx); 31755714Skris dd= s->enc_write_ctx; 31855714Skris s->write_hash=m; 319160814Ssimon#ifndef OPENSSL_NO_COMP 32055714Skris if (s->compress != NULL) 32155714Skris { 32255714Skris COMP_CTX_free(s->compress); 32355714Skris s->compress=NULL; 32455714Skris } 32555714Skris if (comp != NULL) 32655714Skris { 32755714Skris s->compress=COMP_CTX_new(comp->method); 32855714Skris if (s->compress == NULL) 32955714Skris { 33055714Skris SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 33155714Skris goto err2; 33255714Skris } 33355714Skris } 334160814Ssimon#endif 335160814Ssimon /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 336160814Ssimon if (s->version != DTLS1_VERSION) 337160814Ssimon memset(&(s->s3->write_sequence[0]),0,8); 33855714Skris mac_secret= &(s->s3->write_mac_secret[0]); 33955714Skris } 34055714Skris 341109998Smarkm if (reuse_dd) 342109998Smarkm EVP_CIPHER_CTX_cleanup(dd); 34355714Skris 34455714Skris p=s->s3->tmp.key_block; 34555714Skris i=EVP_MD_size(m); 34655714Skris cl=EVP_CIPHER_key_length(c); 347109998Smarkm j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 348109998Smarkm cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 34955714Skris /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 35055714Skris k=EVP_CIPHER_iv_length(c); 35155714Skris if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 35255714Skris (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 35355714Skris { 35455714Skris ms= &(p[ 0]); n=i+i; 35555714Skris key= &(p[ n]); n+=j+j; 35655714Skris iv= &(p[ n]); n+=k+k; 35755714Skris exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 35855714Skris exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 35955714Skris client_write=1; 36055714Skris } 36155714Skris else 36255714Skris { 36355714Skris n=i; 36455714Skris ms= &(p[ n]); n+=i+j; 36555714Skris key= &(p[ n]); n+=j+k; 36655714Skris iv= &(p[ n]); n+=k; 36755714Skris exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 36855714Skris exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 36955714Skris client_write=0; 37055714Skris } 37155714Skris 37255714Skris if (n > s->s3->tmp.key_block_length) 37355714Skris { 374109998Smarkm SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 37555714Skris goto err2; 37655714Skris } 37755714Skris 37855714Skris memcpy(mac_secret,ms,i); 37955714Skris#ifdef TLS_DEBUG 38055714Skrisprintf("which = %04X\nmac key=",which); 38155714Skris{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 38255714Skris#endif 383109998Smarkm if (is_export) 38455714Skris { 38555714Skris /* In here I set both the read and write key/iv to the 38655714Skris * same value since only the correct one will be used :-). 38755714Skris */ 38855714Skris p=buf; 38955714Skris memcpy(p,exp_label,exp_label_len); 39055714Skris p+=exp_label_len; 39155714Skris memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 39255714Skris p+=SSL3_RANDOM_SIZE; 39355714Skris memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 39455714Skris p+=SSL3_RANDOM_SIZE; 39555714Skris tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, 39655714Skris tmp1,tmp2,EVP_CIPHER_key_length(c)); 39755714Skris key=tmp1; 39855714Skris 39955714Skris if (k > 0) 40055714Skris { 40155714Skris p=buf; 40255714Skris memcpy(p,TLS_MD_IV_BLOCK_CONST, 40355714Skris TLS_MD_IV_BLOCK_CONST_SIZE); 40455714Skris p+=TLS_MD_IV_BLOCK_CONST_SIZE; 40555714Skris memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 40655714Skris p+=SSL3_RANDOM_SIZE; 40755714Skris memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 40855714Skris p+=SSL3_RANDOM_SIZE; 40955714Skris tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0, 41055714Skris iv1,iv2,k*2); 41155714Skris if (client_write) 41255714Skris iv=iv1; 41355714Skris else 41455714Skris iv= &(iv1[k]); 41555714Skris } 41655714Skris } 41755714Skris 41855714Skris s->session->key_arg_length=0; 419109998Smarkm#ifdef KSSL_DEBUG 420109998Smarkm { 421194206Ssimon int ki; 422109998Smarkm printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 423194206Ssimon printf("\tkey= "); 424194206Ssimon for (ki=0; ki<c->key_len; ki++) printf("%02x", key[ki]); 425109998Smarkm printf("\n"); 426194206Ssimon printf("\t iv= "); 427194206Ssimon for (ki=0; ki<c->iv_len; ki++) printf("%02x", iv[ki]); 428109998Smarkm printf("\n"); 429109998Smarkm } 430109998Smarkm#endif /* KSSL_DEBUG */ 43155714Skris 432109998Smarkm EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 43355714Skris#ifdef TLS_DEBUG 43455714Skrisprintf("which = %04X\nkey=",which); 43555714Skris{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 43655714Skrisprintf("\niv="); 43755714Skris{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 43855714Skrisprintf("\n"); 43955714Skris#endif 44055714Skris 441109998Smarkm OPENSSL_cleanse(tmp1,sizeof(tmp1)); 442109998Smarkm OPENSSL_cleanse(tmp2,sizeof(tmp1)); 443109998Smarkm OPENSSL_cleanse(iv1,sizeof(iv1)); 444109998Smarkm OPENSSL_cleanse(iv2,sizeof(iv2)); 44555714Skris return(1); 44655714Skriserr: 44755714Skris SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 44855714Skriserr2: 44955714Skris return(0); 45055714Skris } 45155714Skris 45255714Skrisint tls1_setup_key_block(SSL *s) 45355714Skris { 45455714Skris unsigned char *p1,*p2; 45555714Skris const EVP_CIPHER *c; 45655714Skris const EVP_MD *hash; 45755714Skris int num; 45855714Skris SSL_COMP *comp; 45955714Skris 460109998Smarkm#ifdef KSSL_DEBUG 461109998Smarkm printf ("tls1_setup_key_block()\n"); 462109998Smarkm#endif /* KSSL_DEBUG */ 463109998Smarkm 46455714Skris if (s->s3->tmp.key_block_length != 0) 46555714Skris return(1); 46655714Skris 46755714Skris if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) 46855714Skris { 46955714Skris SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 47055714Skris return(0); 47155714Skris } 47255714Skris 47355714Skris s->s3->tmp.new_sym_enc=c; 47455714Skris s->s3->tmp.new_hash=hash; 47555714Skris 47655714Skris num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); 47755714Skris num*=2; 47855714Skris 47955714Skris ssl3_cleanup_key_block(s); 48055714Skris 48168651Skris if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 48255714Skris goto err; 48368651Skris if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 48455714Skris goto err; 48555714Skris 48655714Skris s->s3->tmp.key_block_length=num; 48755714Skris s->s3->tmp.key_block=p1; 48855714Skris 48955714Skris 49055714Skris#ifdef TLS_DEBUG 49155714Skrisprintf("client random\n"); 49255714Skris{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 49355714Skrisprintf("server random\n"); 49455714Skris{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 49555714Skrisprintf("pre-master\n"); 49655714Skris{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 49755714Skris#endif 49855714Skris tls1_generate_key_block(s,p1,p2,num); 499109998Smarkm OPENSSL_cleanse(p2,num); 50068651Skris OPENSSL_free(p2); 50155714Skris#ifdef TLS_DEBUG 50255714Skrisprintf("\nkey block\n"); 50355714Skris{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 50455714Skris#endif 50555714Skris 506100936Snectar if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 507100936Snectar { 508100936Snectar /* enable vulnerability countermeasure for CBC ciphers with 509100936Snectar * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 510100936Snectar */ 511100936Snectar s->s3->need_empty_fragments = 1; 512100936Snectar 513100936Snectar if (s->session->cipher != NULL) 514100936Snectar { 515100936Snectar if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL) 516100936Snectar s->s3->need_empty_fragments = 0; 517100936Snectar 518109998Smarkm#ifndef OPENSSL_NO_RC4 519100936Snectar if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4) 520100936Snectar s->s3->need_empty_fragments = 0; 521100928Snectar#endif 522100936Snectar } 523100936Snectar } 524160814Ssimon 52555714Skris return(1); 52655714Skriserr: 52755714Skris SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 52855714Skris return(0); 52955714Skris } 53055714Skris 53155714Skrisint tls1_enc(SSL *s, int send) 53255714Skris { 53355714Skris SSL3_RECORD *rec; 53455714Skris EVP_CIPHER_CTX *ds; 53555714Skris unsigned long l; 536215697Ssimon int bs,i,ii,j,k; 53755714Skris const EVP_CIPHER *enc; 53855714Skris 53955714Skris if (send) 54055714Skris { 54155714Skris ds=s->enc_write_ctx; 54255714Skris rec= &(s->s3->wrec); 54355714Skris if (s->enc_write_ctx == NULL) 54455714Skris enc=NULL; 54555714Skris else 54655714Skris enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 54755714Skris } 54855714Skris else 54955714Skris { 55055714Skris ds=s->enc_read_ctx; 55155714Skris rec= &(s->s3->rrec); 55255714Skris if (s->enc_read_ctx == NULL) 55355714Skris enc=NULL; 55455714Skris else 55555714Skris enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 55655714Skris } 55755714Skris 558109998Smarkm#ifdef KSSL_DEBUG 559109998Smarkm printf("tls1_enc(%d)\n", send); 560109998Smarkm#endif /* KSSL_DEBUG */ 561109998Smarkm 56255714Skris if ((s->session == NULL) || (ds == NULL) || 56355714Skris (enc == NULL)) 56455714Skris { 56579998Skris memmove(rec->data,rec->input,rec->length); 56655714Skris rec->input=rec->data; 56755714Skris } 56855714Skris else 56955714Skris { 57055714Skris l=rec->length; 57155714Skris bs=EVP_CIPHER_block_size(ds->cipher); 57255714Skris 57355714Skris if ((bs != 1) && send) 57455714Skris { 57555714Skris i=bs-((int)l%bs); 57655714Skris 57755714Skris /* Add weird padding of upto 256 bytes */ 57855714Skris 57955714Skris /* we need to add 'i' padding bytes of value j */ 58055714Skris j=i-1; 58155714Skris if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 58255714Skris { 58355714Skris if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 58455714Skris j++; 58555714Skris } 58655714Skris for (k=(int)l; k<(int)(l+i); k++) 58755714Skris rec->input[k]=j; 58855714Skris l+=i; 58955714Skris rec->length+=i; 59055714Skris } 59155714Skris 592109998Smarkm#ifdef KSSL_DEBUG 593109998Smarkm { 594109998Smarkm unsigned long ui; 595109998Smarkm printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 596194206Ssimon (void *)ds,rec->data,rec->input,l); 597194206Ssimon printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%ld %ld], %d iv_len\n", 598109998Smarkm ds->buf_len, ds->cipher->key_len, 599194206Ssimon (unsigned long)DES_KEY_SZ, 600194206Ssimon (unsigned long)DES_SCHEDULE_SZ, 601109998Smarkm ds->cipher->iv_len); 602109998Smarkm printf("\t\tIV: "); 603109998Smarkm for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 604109998Smarkm printf("\n"); 605109998Smarkm printf("\trec->input="); 606109998Smarkm for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 607109998Smarkm printf("\n"); 608109998Smarkm } 609109998Smarkm#endif /* KSSL_DEBUG */ 610109998Smarkm 61179998Skris if (!send) 61279998Skris { 61379998Skris if (l == 0 || l%bs != 0) 61479998Skris { 61579998Skris SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 61689837Skris ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 61789837Skris return 0; 61879998Skris } 61979998Skris } 62079998Skris 62155714Skris EVP_Cipher(ds,rec->data,rec->input,l); 62255714Skris 623109998Smarkm#ifdef KSSL_DEBUG 624109998Smarkm { 625194206Ssimon unsigned long ki; 626109998Smarkm printf("\trec->data="); 627194206Ssimon for (ki=0; ki<l; i++) 628194206Ssimon printf(" %02x", rec->data[ki]); printf("\n"); 629109998Smarkm } 630109998Smarkm#endif /* KSSL_DEBUG */ 631109998Smarkm 63255714Skris if ((bs != 1) && !send) 63355714Skris { 63479998Skris ii=i=rec->data[l-1]; /* padding_length */ 63555714Skris i++; 636162911Ssimon /* NB: if compression is in operation the first packet 637162911Ssimon * may not be of even length so the padding bug check 638162911Ssimon * cannot be performed. This bug workaround has been 639162911Ssimon * around since SSLeay so hopefully it is either fixed 640162911Ssimon * now or no buggy implementation supports compression 641162911Ssimon * [steve] 642162911Ssimon */ 643162911Ssimon if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 644162911Ssimon && !s->expand) 64555714Skris { 64655714Skris /* First packet is even in size, so check */ 64755714Skris if ((memcmp(s->s3->read_sequence, 64855714Skris "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 64955714Skris s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 65055714Skris if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 65155714Skris i--; 65255714Skris } 65379998Skris /* TLS 1.0 does not bound the number of padding bytes by the block size. 65479998Skris * All of them must have value 'padding_length'. */ 65555714Skris if (i > (int)rec->length) 65655714Skris { 65789837Skris /* Incorrect padding. SSLerr() and ssl3_alert are done 65889837Skris * by caller: we don't want to reveal whether this is 65989837Skris * a decryption error or a MAC verification failure 66089837Skris * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ 66189837Skris return -1; 66255714Skris } 66355714Skris for (j=(int)(l-i); j<(int)l; j++) 66455714Skris { 66555714Skris if (rec->data[j] != ii) 66655714Skris { 66789837Skris /* Incorrect padding */ 66889837Skris return -1; 66955714Skris } 67055714Skris } 67155714Skris rec->length-=i; 67255714Skris } 67355714Skris } 67455714Skris return(1); 67555714Skris } 67655714Skris 67755714Skrisint tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out) 67855714Skris { 67955714Skris unsigned int ret; 68055714Skris EVP_MD_CTX ctx; 68155714Skris 682109998Smarkm EVP_MD_CTX_init(&ctx); 683109998Smarkm EVP_MD_CTX_copy_ex(&ctx,in_ctx); 684109998Smarkm EVP_DigestFinal_ex(&ctx,out,&ret); 685109998Smarkm EVP_MD_CTX_cleanup(&ctx); 68655714Skris return((int)ret); 68755714Skris } 68855714Skris 68955714Skrisint tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx, 69059191Skris const char *str, int slen, unsigned char *out) 69155714Skris { 69255714Skris unsigned int i; 69355714Skris EVP_MD_CTX ctx; 69455714Skris unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 69555714Skris unsigned char *q,buf2[12]; 69655714Skris 69755714Skris q=buf; 69855714Skris memcpy(q,str,slen); 69955714Skris q+=slen; 70055714Skris 701109998Smarkm EVP_MD_CTX_init(&ctx); 702109998Smarkm EVP_MD_CTX_copy_ex(&ctx,in1_ctx); 703109998Smarkm EVP_DigestFinal_ex(&ctx,q,&i); 70455714Skris q+=i; 705109998Smarkm EVP_MD_CTX_copy_ex(&ctx,in2_ctx); 706109998Smarkm EVP_DigestFinal_ex(&ctx,q,&i); 70755714Skris q+=i; 70855714Skris 70955714Skris tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), 71055714Skris s->session->master_key,s->session->master_key_length, 711109998Smarkm out,buf2,sizeof buf2); 712109998Smarkm EVP_MD_CTX_cleanup(&ctx); 71355714Skris 714109998Smarkm return sizeof buf2; 71555714Skris } 71655714Skris 71755714Skrisint tls1_mac(SSL *ssl, unsigned char *md, int send) 71855714Skris { 71955714Skris SSL3_RECORD *rec; 72055714Skris unsigned char *mac_sec,*seq; 72155714Skris const EVP_MD *hash; 72255714Skris unsigned int md_size; 72355714Skris int i; 72455714Skris HMAC_CTX hmac; 72555714Skris unsigned char buf[5]; 72655714Skris 72755714Skris if (send) 72855714Skris { 72955714Skris rec= &(ssl->s3->wrec); 73055714Skris mac_sec= &(ssl->s3->write_mac_secret[0]); 73155714Skris seq= &(ssl->s3->write_sequence[0]); 73255714Skris hash=ssl->write_hash; 73355714Skris } 73455714Skris else 73555714Skris { 73655714Skris rec= &(ssl->s3->rrec); 73755714Skris mac_sec= &(ssl->s3->read_mac_secret[0]); 73855714Skris seq= &(ssl->s3->read_sequence[0]); 73955714Skris hash=ssl->read_hash; 74055714Skris } 74155714Skris 74255714Skris md_size=EVP_MD_size(hash); 74355714Skris 74455714Skris buf[0]=rec->type; 745194206Ssimon if (ssl->version == DTLS1_VERSION && ssl->client_version == DTLS1_BAD_VER) 746194206Ssimon { 747194206Ssimon buf[1]=TLS1_VERSION_MAJOR; 748194206Ssimon buf[2]=TLS1_VERSION_MINOR; 749194206Ssimon } 750194206Ssimon else { 751194206Ssimon buf[1]=(unsigned char)(ssl->version>>8); 752194206Ssimon buf[2]=(unsigned char)(ssl->version); 753194206Ssimon } 754194206Ssimon 75555714Skris buf[3]=rec->length>>8; 75655714Skris buf[4]=rec->length&0xff; 75755714Skris 75855714Skris /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 759109998Smarkm HMAC_CTX_init(&hmac); 760109998Smarkm HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL); 761194206Ssimon 762205128Ssimon if (ssl->version == DTLS1_BAD_VER || 763205128Ssimon (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER)) 764194206Ssimon { 765194206Ssimon unsigned char dtlsseq[8],*p=dtlsseq; 766194206Ssimon s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 767194206Ssimon memcpy (p,&seq[2],6); 768194206Ssimon 769194206Ssimon HMAC_Update(&hmac,dtlsseq,8); 770194206Ssimon } 771194206Ssimon else 772194206Ssimon HMAC_Update(&hmac,seq,8); 773194206Ssimon 77455714Skris HMAC_Update(&hmac,buf,5); 77555714Skris HMAC_Update(&hmac,rec->input,rec->length); 77655714Skris HMAC_Final(&hmac,md,&md_size); 777109998Smarkm HMAC_CTX_cleanup(&hmac); 77855714Skris 77955714Skris#ifdef TLS_DEBUG 78055714Skrisprintf("sec="); 78155714Skris{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 78255714Skrisprintf("seq="); 78355714Skris{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 78455714Skrisprintf("buf="); 78555714Skris{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 78655714Skrisprintf("rec="); 78755714Skris{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 78855714Skris#endif 78955714Skris 790205128Ssimon if ( SSL_version(ssl) != DTLS1_VERSION && SSL_version(ssl) != DTLS1_BAD_VER) 791194206Ssimon { 792160814Ssimon for (i=7; i>=0; i--) 793160814Ssimon { 794160814Ssimon ++seq[i]; 795160814Ssimon if (seq[i] != 0) break; 796160814Ssimon } 79776866Skris } 79855714Skris 79955714Skris#ifdef TLS_DEBUG 80055714Skris{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 80155714Skris#endif 80255714Skris return(md_size); 80355714Skris } 80455714Skris 80555714Skrisint tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 80655714Skris int len) 80755714Skris { 80855714Skris unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; 80955714Skris unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 81055714Skris 811109998Smarkm#ifdef KSSL_DEBUG 812194206Ssimon printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", (void *)s,out, p,len); 813109998Smarkm#endif /* KSSL_DEBUG */ 814109998Smarkm 81555714Skris /* Setup the stuff to munge */ 81655714Skris memcpy(buf,TLS_MD_MASTER_SECRET_CONST, 81755714Skris TLS_MD_MASTER_SECRET_CONST_SIZE); 81855714Skris memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), 81955714Skris s->s3->client_random,SSL3_RANDOM_SIZE); 82055714Skris memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), 82155714Skris s->s3->server_random,SSL3_RANDOM_SIZE); 82255714Skris tls1_PRF(s->ctx->md5,s->ctx->sha1, 82355714Skris buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, 824109998Smarkm s->session->master_key,buff,sizeof buff); 825109998Smarkm#ifdef KSSL_DEBUG 826109998Smarkm printf ("tls1_generate_master_secret() complete\n"); 827109998Smarkm#endif /* KSSL_DEBUG */ 82855714Skris return(SSL3_MASTER_SECRET_SIZE); 82955714Skris } 83055714Skris 83155714Skrisint tls1_alert_code(int code) 83255714Skris { 83355714Skris switch (code) 83455714Skris { 83555714Skris case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 83655714Skris case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 83755714Skris case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 83855714Skris case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 83955714Skris case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 84055714Skris case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 84155714Skris case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 84255714Skris case SSL_AD_NO_CERTIFICATE: return(-1); 84355714Skris case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 84455714Skris case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 84555714Skris case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 84655714Skris case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 84755714Skris case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 84855714Skris case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 84955714Skris case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 85055714Skris case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 85155714Skris case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 85255714Skris case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 85359191Skris case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 85455714Skris case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 85555714Skris case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 85655714Skris case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 85759191Skris case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 85855714Skris case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 859194206Ssimon#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 860160814Ssimon case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 861160814Ssimon (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 862194206Ssimon#endif 86355714Skris default: return(-1); 86455714Skris } 86555714Skris } 86655714Skris 867