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/* ssl/t1_enc.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "ssl_locl.h"
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#include <openssl/comp.h>
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#include <openssl/evp.h>
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#include <openssl/hmac.h>
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#include <openssl/md5.h>
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static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
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int sec_len, unsigned char *seed, int seed_len,
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unsigned char *out, int olen)
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{
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int chunk,n;
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unsigned int j;
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HMAC_CTX ctx;
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HMAC_CTX ctx_tmp;
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unsigned char A1[EVP_MAX_MD_SIZE];
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unsigned int A1_len;
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chunk=EVP_MD_size(md);
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HMAC_CTX_init(&ctx);
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HMAC_CTX_init(&ctx_tmp);
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HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
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HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
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HMAC_Update(&ctx,seed,seed_len);
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HMAC_Final(&ctx,A1,&A1_len);
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n=0;
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for (;;)
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{
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HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
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HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
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HMAC_Update(&ctx,A1,A1_len);
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HMAC_Update(&ctx_tmp,A1,A1_len);
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HMAC_Update(&ctx,seed,seed_len);
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if (olen > chunk)
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{
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HMAC_Final(&ctx,out,&j);
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out+=j;
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olen-=j;
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HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
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}
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else /* last one */
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{
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HMAC_Final(&ctx,A1,&A1_len);
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memcpy(out,A1,olen);
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break;
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}
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}
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HMAC_CTX_cleanup(&ctx);
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HMAC_CTX_cleanup(&ctx_tmp);
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OPENSSL_cleanse(A1,sizeof(A1));
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}
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static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
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unsigned char *label, int label_len,
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const unsigned char *sec, int slen, unsigned char *out1,
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unsigned char *out2, int olen)
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{
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int len,i;
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const unsigned char *S1,*S2;
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len=slen/2;
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S1=sec;
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S2= &(sec[len]);
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len+=(slen&1); /* add for odd, make longer */
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tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
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tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
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for (i=0; i<olen; i++)
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out1[i]^=out2[i];
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}
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static void tls1_generate_key_block(SSL *s, unsigned char *km,
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unsigned char *tmp, int num)
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{
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unsigned char *p;
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unsigned char buf[SSL3_RANDOM_SIZE*2+
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TLS_MD_MAX_CONST_SIZE];
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p=buf;
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memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
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TLS_MD_KEY_EXPANSION_CONST_SIZE);
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p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
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memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
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p+=SSL3_RANDOM_SIZE;
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memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
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p+=SSL3_RANDOM_SIZE;
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tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
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s->session->master_key,s->session->master_key_length,
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km,tmp,num);
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#ifdef KSSL_DEBUG
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printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
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s->session->master_key_length);
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{
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int i;
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for (i=0; i < s->session->master_key_length; i++)
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{
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printf("%02X", s->session->master_key[i]);
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}
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printf("\n"); }
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#endif /* KSSL_DEBUG */
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}
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int tls1_change_cipher_state(SSL *s, int which)
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{
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static const unsigned char empty[]="";
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unsigned char *p,*key_block,*mac_secret;
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unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
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SSL3_RANDOM_SIZE*2];
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unsigned char tmp1[EVP_MAX_KEY_LENGTH];
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unsigned char tmp2[EVP_MAX_KEY_LENGTH];
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unsigned char iv1[EVP_MAX_IV_LENGTH*2];
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unsigned char iv2[EVP_MAX_IV_LENGTH*2];
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unsigned char *ms,*key,*iv,*er1,*er2;
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int client_write;
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EVP_CIPHER_CTX *dd;
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const EVP_CIPHER *c;
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#ifndef OPENSSL_NO_COMP
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const SSL_COMP *comp;
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#endif
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const EVP_MD *m;
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int is_export,n,i,j,k,exp_label_len,cl;
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int reuse_dd = 0;
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is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
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c=s->s3->tmp.new_sym_enc;
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m=s->s3->tmp.new_hash;
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#ifndef OPENSSL_NO_COMP
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comp=s->s3->tmp.new_compression;
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#endif
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key_block=s->s3->tmp.key_block;
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#ifdef KSSL_DEBUG
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printf("tls1_change_cipher_state(which= %d) w/\n", which);
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printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms,
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comp);
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printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
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printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
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c->nid,c->block_size,c->key_len,c->iv_len);
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printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
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{
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int i;
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for (i=0; i<s->s3->tmp.key_block_length; i++)
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printf("%02x", key_block[i]); printf("\n");
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}
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#endif /* KSSL_DEBUG */
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262 |
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if (which & SSL3_CC_READ)
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{
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if (s->enc_read_ctx != NULL)
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reuse_dd = 1;
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else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
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goto err;
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dd= s->enc_read_ctx;
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s->read_hash=m;
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#ifndef OPENSSL_NO_COMP
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if (s->expand != NULL)
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{
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COMP_CTX_free(s->expand);
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s->expand=NULL;
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276 |
}
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277 |
if (comp != NULL)
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278 |
{
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s->expand=COMP_CTX_new(comp->method);
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if (s->expand == NULL)
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281 |
{
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282 |
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
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283 |
goto err2;
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284 |
}
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285 |
if (s->s3->rrec.comp == NULL)
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286 |
s->s3->rrec.comp=(unsigned char *)
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287 |
OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
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288 |
if (s->s3->rrec.comp == NULL)
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289 |
goto err;
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290 |
}
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291 |
#endif
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|
292 |
/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
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293 |
if (s->version != DTLS1_VERSION)
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294 |
memset(&(s->s3->read_sequence[0]),0,8);
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mac_secret= &(s->s3->read_mac_secret[0]);
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296 |
}
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297 |
else
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298 |
{
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|
299 |
if (s->enc_write_ctx != NULL)
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300 |
reuse_dd = 1;
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|
301 |
else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
|
|
302 |
goto err;
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|
303 |
if ((s->enc_write_ctx == NULL) &&
|
|
304 |
((s->enc_write_ctx=(EVP_CIPHER_CTX *)
|
|
305 |
OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
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|
306 |
goto err;
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|
307 |
dd= s->enc_write_ctx;
|
|
308 |
s->write_hash=m;
|
|
309 |
#ifndef OPENSSL_NO_COMP
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|
310 |
if (s->compress != NULL)
|
|
311 |
{
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|
312 |
COMP_CTX_free(s->compress);
|
|
313 |
s->compress=NULL;
|
|
314 |
}
|
|
315 |
if (comp != NULL)
|
|
316 |
{
|
|
317 |
s->compress=COMP_CTX_new(comp->method);
|
|
318 |
if (s->compress == NULL)
|
|
319 |
{
|
|
320 |
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
|
|
321 |
goto err2;
|
|
322 |
}
|
|
323 |
}
|
|
324 |
#endif
|
|
325 |
/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
|
|
326 |
if (s->version != DTLS1_VERSION)
|
|
327 |
memset(&(s->s3->write_sequence[0]),0,8);
|
|
328 |
mac_secret= &(s->s3->write_mac_secret[0]);
|
|
329 |
}
|
|
330 |
|
|
331 |
if (reuse_dd)
|
|
332 |
EVP_CIPHER_CTX_cleanup(dd);
|
|
333 |
EVP_CIPHER_CTX_init(dd);
|
|
334 |
|
|
335 |
p=s->s3->tmp.key_block;
|
|
336 |
i=EVP_MD_size(m);
|
|
337 |
cl=EVP_CIPHER_key_length(c);
|
|
338 |
j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
|
|
339 |
cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
|
|
340 |
/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
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|
341 |
k=EVP_CIPHER_iv_length(c);
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|
342 |
er1= &(s->s3->client_random[0]);
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|
343 |
er2= &(s->s3->server_random[0]);
|
|
344 |
if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
|
|
345 |
(which == SSL3_CHANGE_CIPHER_SERVER_READ))
|
|
346 |
{
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|
347 |
ms= &(p[ 0]); n=i+i;
|
|
348 |
key= &(p[ n]); n+=j+j;
|
|
349 |
iv= &(p[ n]); n+=k+k;
|
|
350 |
exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
|
|
351 |
exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
|
|
352 |
client_write=1;
|
|
353 |
}
|
|
354 |
else
|
|
355 |
{
|
|
356 |
n=i;
|
|
357 |
ms= &(p[ n]); n+=i+j;
|
|
358 |
key= &(p[ n]); n+=j+k;
|
|
359 |
iv= &(p[ n]); n+=k;
|
|
360 |
exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
|
|
361 |
exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
|
|
362 |
client_write=0;
|
|
363 |
}
|
|
364 |
|
|
365 |
if (n > s->s3->tmp.key_block_length)
|
|
366 |
{
|
|
367 |
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
|
|
368 |
goto err2;
|
|
369 |
}
|
|
370 |
|
|
371 |
memcpy(mac_secret,ms,i);
|
|
372 |
#ifdef TLS_DEBUG
|
|
373 |
printf("which = %04X\nmac key=",which);
|
|
374 |
{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
|
|
375 |
#endif
|
|
376 |
if (is_export)
|
|
377 |
{
|
|
378 |
/* In here I set both the read and write key/iv to the
|
|
379 |
* same value since only the correct one will be used :-).
|
|
380 |
*/
|
|
381 |
p=buf;
|
|
382 |
memcpy(p,exp_label,exp_label_len);
|
|
383 |
p+=exp_label_len;
|
|
384 |
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
385 |
p+=SSL3_RANDOM_SIZE;
|
|
386 |
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
387 |
p+=SSL3_RANDOM_SIZE;
|
|
388 |
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
|
|
389 |
tmp1,tmp2,EVP_CIPHER_key_length(c));
|
|
390 |
key=tmp1;
|
|
391 |
|
|
392 |
if (k > 0)
|
|
393 |
{
|
|
394 |
p=buf;
|
|
395 |
memcpy(p,TLS_MD_IV_BLOCK_CONST,
|
|
396 |
TLS_MD_IV_BLOCK_CONST_SIZE);
|
|
397 |
p+=TLS_MD_IV_BLOCK_CONST_SIZE;
|
|
398 |
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
399 |
p+=SSL3_RANDOM_SIZE;
|
|
400 |
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
401 |
p+=SSL3_RANDOM_SIZE;
|
|
402 |
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
|
|
403 |
iv1,iv2,k*2);
|
|
404 |
if (client_write)
|
|
405 |
iv=iv1;
|
|
406 |
else
|
|
407 |
iv= &(iv1[k]);
|
|
408 |
}
|
|
409 |
}
|
|
410 |
|
|
411 |
s->session->key_arg_length=0;
|
|
412 |
#ifdef KSSL_DEBUG
|
|
413 |
{
|
|
414 |
int i;
|
|
415 |
printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
|
|
416 |
printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
|
|
417 |
printf("\n");
|
|
418 |
printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
|
|
419 |
printf("\n");
|
|
420 |
}
|
|
421 |
#endif /* KSSL_DEBUG */
|
|
422 |
|
|
423 |
EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
|
|
424 |
#ifdef TLS_DEBUG
|
|
425 |
printf("which = %04X\nkey=",which);
|
|
426 |
{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
|
|
427 |
printf("\niv=");
|
|
428 |
{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
|
|
429 |
printf("\n");
|
|
430 |
#endif
|
|
431 |
|
|
432 |
OPENSSL_cleanse(tmp1,sizeof(tmp1));
|
|
433 |
OPENSSL_cleanse(tmp2,sizeof(tmp1));
|
|
434 |
OPENSSL_cleanse(iv1,sizeof(iv1));
|
|
435 |
OPENSSL_cleanse(iv2,sizeof(iv2));
|
|
436 |
return(1);
|
|
437 |
err:
|
|
438 |
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
|
|
439 |
err2:
|
|
440 |
return(0);
|
|
441 |
}
|
|
442 |
|
|
443 |
int tls1_setup_key_block(SSL *s)
|
|
444 |
{
|
|
445 |
unsigned char *p1,*p2;
|
|
446 |
const EVP_CIPHER *c;
|
|
447 |
const EVP_MD *hash;
|
|
448 |
int num;
|
|
449 |
SSL_COMP *comp;
|
|
450 |
|
|
451 |
#ifdef KSSL_DEBUG
|
|
452 |
printf ("tls1_setup_key_block()\n");
|
|
453 |
#endif /* KSSL_DEBUG */
|
|
454 |
|
|
455 |
if (s->s3->tmp.key_block_length != 0)
|
|
456 |
return(1);
|
|
457 |
|
|
458 |
if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
|
|
459 |
{
|
|
460 |
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
|
|
461 |
return(0);
|
|
462 |
}
|
|
463 |
|
|
464 |
s->s3->tmp.new_sym_enc=c;
|
|
465 |
s->s3->tmp.new_hash=hash;
|
|
466 |
|
|
467 |
num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
|
|
468 |
num*=2;
|
|
469 |
|
|
470 |
ssl3_cleanup_key_block(s);
|
|
471 |
|
|
472 |
if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
|
|
473 |
goto err;
|
|
474 |
if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
|
|
475 |
goto err;
|
|
476 |
|
|
477 |
s->s3->tmp.key_block_length=num;
|
|
478 |
s->s3->tmp.key_block=p1;
|
|
479 |
|
|
480 |
|
|
481 |
#ifdef TLS_DEBUG
|
|
482 |
printf("client random\n");
|
|
483 |
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
|
|
484 |
printf("server random\n");
|
|
485 |
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
|
|
486 |
printf("pre-master\n");
|
|
487 |
{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
|
|
488 |
#endif
|
|
489 |
tls1_generate_key_block(s,p1,p2,num);
|
|
490 |
OPENSSL_cleanse(p2,num);
|
|
491 |
OPENSSL_free(p2);
|
|
492 |
#ifdef TLS_DEBUG
|
|
493 |
printf("\nkey block\n");
|
|
494 |
{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
|
|
495 |
#endif
|
|
496 |
|
|
497 |
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
|
|
498 |
{
|
|
499 |
/* enable vulnerability countermeasure for CBC ciphers with
|
|
500 |
* known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
|
|
501 |
*/
|
|
502 |
s->s3->need_empty_fragments = 1;
|
|
503 |
|
|
504 |
if (s->session->cipher != NULL)
|
|
505 |
{
|
|
506 |
if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
|
|
507 |
s->s3->need_empty_fragments = 0;
|
|
508 |
|
|
509 |
#ifndef OPENSSL_NO_RC4
|
|
510 |
if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
|
|
511 |
s->s3->need_empty_fragments = 0;
|
|
512 |
#endif
|
|
513 |
}
|
|
514 |
}
|
|
515 |
|
|
516 |
return(1);
|
|
517 |
err:
|
|
518 |
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
|
|
519 |
return(0);
|
|
520 |
}
|
|
521 |
|
|
522 |
int tls1_enc(SSL *s, int send)
|
|
523 |
{
|
|
524 |
SSL3_RECORD *rec;
|
|
525 |
EVP_CIPHER_CTX *ds;
|
|
526 |
unsigned long l;
|
|
527 |
int bs,i,ii,j,k,n=0;
|
|
528 |
const EVP_CIPHER *enc;
|
|
529 |
|
|
530 |
if (send)
|
|
531 |
{
|
|
532 |
if (s->write_hash != NULL)
|
|
533 |
n=EVP_MD_size(s->write_hash);
|
|
534 |
ds=s->enc_write_ctx;
|
|
535 |
rec= &(s->s3->wrec);
|
|
536 |
if (s->enc_write_ctx == NULL)
|
|
537 |
enc=NULL;
|
|
538 |
else
|
|
539 |
enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
|
|
540 |
}
|
|
541 |
else
|
|
542 |
{
|
|
543 |
if (s->read_hash != NULL)
|
|
544 |
n=EVP_MD_size(s->read_hash);
|
|
545 |
ds=s->enc_read_ctx;
|
|
546 |
rec= &(s->s3->rrec);
|
|
547 |
if (s->enc_read_ctx == NULL)
|
|
548 |
enc=NULL;
|
|
549 |
else
|
|
550 |
enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
|
|
551 |
}
|
|
552 |
|
|
553 |
#ifdef KSSL_DEBUG
|
|
554 |
printf("tls1_enc(%d)\n", send);
|
|
555 |
#endif /* KSSL_DEBUG */
|
|
556 |
|
|
557 |
if ((s->session == NULL) || (ds == NULL) ||
|
|
558 |
(enc == NULL))
|
|
559 |
{
|
|
560 |
memmove(rec->data,rec->input,rec->length);
|
|
561 |
rec->input=rec->data;
|
|
562 |
}
|
|
563 |
else
|
|
564 |
{
|
|
565 |
l=rec->length;
|
|
566 |
bs=EVP_CIPHER_block_size(ds->cipher);
|
|
567 |
|
|
568 |
if ((bs != 1) && send)
|
|
569 |
{
|
|
570 |
i=bs-((int)l%bs);
|
|
571 |
|
|
572 |
/* Add weird padding of upto 256 bytes */
|
|
573 |
|
|
574 |
/* we need to add 'i' padding bytes of value j */
|
|
575 |
j=i-1;
|
|
576 |
if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
|
|
577 |
{
|
|
578 |
if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
|
|
579 |
j++;
|
|
580 |
}
|
|
581 |
for (k=(int)l; k<(int)(l+i); k++)
|
|
582 |
rec->input[k]=j;
|
|
583 |
l+=i;
|
|
584 |
rec->length+=i;
|
|
585 |
}
|
|
586 |
|
|
587 |
#ifdef KSSL_DEBUG
|
|
588 |
{
|
|
589 |
unsigned long ui;
|
|
590 |
printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
|
|
591 |
ds,rec->data,rec->input,l);
|
|
592 |
printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
|
|
593 |
ds->buf_len, ds->cipher->key_len,
|
|
594 |
DES_KEY_SZ, DES_SCHEDULE_SZ,
|
|
595 |
ds->cipher->iv_len);
|
|
596 |
printf("\t\tIV: ");
|
|
597 |
for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
|
|
598 |
printf("\n");
|
|
599 |
printf("\trec->input=");
|
|
600 |
for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
|
|
601 |
printf("\n");
|
|
602 |
}
|
|
603 |
#endif /* KSSL_DEBUG */
|
|
604 |
|
|
605 |
if (!send)
|
|
606 |
{
|
|
607 |
if (l == 0 || l%bs != 0)
|
|
608 |
{
|
|
609 |
SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
|
|
610 |
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
|
|
611 |
return 0;
|
|
612 |
}
|
|
613 |
}
|
|
614 |
|
|
615 |
EVP_Cipher(ds,rec->data,rec->input,l);
|
|
616 |
|
|
617 |
#ifdef KSSL_DEBUG
|
|
618 |
{
|
|
619 |
unsigned long i;
|
|
620 |
printf("\trec->data=");
|
|
621 |
for (i=0; i<l; i++)
|
|
622 |
printf(" %02x", rec->data[i]); printf("\n");
|
|
623 |
}
|
|
624 |
#endif /* KSSL_DEBUG */
|
|
625 |
|
|
626 |
if ((bs != 1) && !send)
|
|
627 |
{
|
|
628 |
ii=i=rec->data[l-1]; /* padding_length */
|
|
629 |
i++;
|
|
630 |
if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
|
|
631 |
{
|
|
632 |
/* First packet is even in size, so check */
|
|
633 |
if ((memcmp(s->s3->read_sequence,
|
|
634 |
"\0\0\0\0\0\0\0\0",8) == 0) &&
|
|
635 |
!(ii & 1) &&
|
|
636 |
rec->data[l-i] != ii)
|
|
637 |
s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
|
|
638 |
if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
|
|
639 |
i--;
|
|
640 |
}
|
|
641 |
/* TLS 1.0 does not bound the number of padding bytes by the block size.
|
|
642 |
* All of them must have value 'padding_length'. */
|
|
643 |
if (i > (int)rec->length)
|
|
644 |
{
|
|
645 |
/* Incorrect padding. SSLerr() and ssl3_alert are done
|
|
646 |
* by caller: we don't want to reveal whether this is
|
|
647 |
* a decryption error or a MAC verification failure
|
|
648 |
* (see http://www.openssl.org/~bodo/tls-cbc.txt) */
|
|
649 |
return -1;
|
|
650 |
}
|
|
651 |
for (j=(int)(l-i); j<(int)l; j++)
|
|
652 |
{
|
|
653 |
if (rec->data[j] != ii)
|
|
654 |
{
|
|
655 |
/* Incorrect padding */
|
|
656 |
return -1;
|
|
657 |
}
|
|
658 |
}
|
|
659 |
rec->length-=i;
|
|
660 |
}
|
|
661 |
}
|
|
662 |
return(1);
|
|
663 |
}
|
|
664 |
|
|
665 |
int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
|
|
666 |
{
|
|
667 |
unsigned int ret;
|
|
668 |
EVP_MD_CTX ctx;
|
|
669 |
|
|
670 |
EVP_MD_CTX_init(&ctx);
|
|
671 |
EVP_MD_CTX_copy_ex(&ctx,in_ctx);
|
|
672 |
EVP_DigestFinal_ex(&ctx,out,&ret);
|
|
673 |
EVP_MD_CTX_cleanup(&ctx);
|
|
674 |
return((int)ret);
|
|
675 |
}
|
|
676 |
|
|
677 |
int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
|
|
678 |
const char *str, int slen, unsigned char *out)
|
|
679 |
{
|
|
680 |
unsigned int i;
|
|
681 |
EVP_MD_CTX ctx;
|
|
682 |
unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
|
|
683 |
unsigned char *q,buf2[12];
|
|
684 |
|
|
685 |
q=buf;
|
|
686 |
memcpy(q,str,slen);
|
|
687 |
q+=slen;
|
|
688 |
|
|
689 |
EVP_MD_CTX_init(&ctx);
|
|
690 |
EVP_MD_CTX_copy_ex(&ctx,in1_ctx);
|
|
691 |
EVP_DigestFinal_ex(&ctx,q,&i);
|
|
692 |
q+=i;
|
|
693 |
EVP_MD_CTX_copy_ex(&ctx,in2_ctx);
|
|
694 |
EVP_DigestFinal_ex(&ctx,q,&i);
|
|
695 |
q+=i;
|
|
696 |
|
|
697 |
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
|
|
698 |
s->session->master_key,s->session->master_key_length,
|
|
699 |
out,buf2,sizeof buf2);
|
|
700 |
EVP_MD_CTX_cleanup(&ctx);
|
|
701 |
|
|
702 |
return sizeof buf2;
|
|
703 |
}
|
|
704 |
|
|
705 |
int tls1_mac(SSL *ssl, unsigned char *md, int send)
|
|
706 |
{
|
|
707 |
SSL3_RECORD *rec;
|
|
708 |
unsigned char *mac_sec,*seq;
|
|
709 |
const EVP_MD *hash;
|
|
710 |
unsigned int md_size;
|
|
711 |
int i;
|
|
712 |
HMAC_CTX hmac;
|
|
713 |
unsigned char buf[5];
|
|
714 |
|
|
715 |
if (send)
|
|
716 |
{
|
|
717 |
rec= &(ssl->s3->wrec);
|
|
718 |
mac_sec= &(ssl->s3->write_mac_secret[0]);
|
|
719 |
seq= &(ssl->s3->write_sequence[0]);
|
|
720 |
hash=ssl->write_hash;
|
|
721 |
}
|
|
722 |
else
|
|
723 |
{
|
|
724 |
rec= &(ssl->s3->rrec);
|
|
725 |
mac_sec= &(ssl->s3->read_mac_secret[0]);
|
|
726 |
seq= &(ssl->s3->read_sequence[0]);
|
|
727 |
hash=ssl->read_hash;
|
|
728 |
}
|
|
729 |
|
|
730 |
md_size=EVP_MD_size(hash);
|
|
731 |
|
|
732 |
buf[0]=rec->type;
|
|
733 |
buf[1]=TLS1_VERSION_MAJOR;
|
|
734 |
buf[2]=TLS1_VERSION_MINOR;
|
|
735 |
buf[3]=rec->length>>8;
|
|
736 |
buf[4]=rec->length&0xff;
|
|
737 |
|
|
738 |
/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
|
|
739 |
HMAC_CTX_init(&hmac);
|
|
740 |
HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
|
|
741 |
HMAC_Update(&hmac,seq,8);
|
|
742 |
HMAC_Update(&hmac,buf,5);
|
|
743 |
HMAC_Update(&hmac,rec->input,rec->length);
|
|
744 |
HMAC_Final(&hmac,md,&md_size);
|
|
745 |
HMAC_CTX_cleanup(&hmac);
|
|
746 |
|
|
747 |
#ifdef TLS_DEBUG
|
|
748 |
printf("sec=");
|
|
749 |
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
|
|
750 |
printf("seq=");
|
|
751 |
{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
|
|
752 |
printf("buf=");
|
|
753 |
{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
|
|
754 |
printf("rec=");
|
|
755 |
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
|
|
756 |
#endif
|
|
757 |
|
|
758 |
if ( SSL_version(ssl) != DTLS1_VERSION)
|
|
759 |
{
|
|
760 |
for (i=7; i>=0; i--)
|
|
761 |
{
|
|
762 |
++seq[i];
|
|
763 |
if (seq[i] != 0) break;
|
|
764 |
}
|
|
765 |
}
|
|
766 |
|
|
767 |
#ifdef TLS_DEBUG
|
|
768 |
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
|
|
769 |
#endif
|
|
770 |
return(md_size);
|
|
771 |
}
|
|
772 |
|
|
773 |
int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
|
|
774 |
int len)
|
|
775 |
{
|
|
776 |
unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
|
|
777 |
unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
|
|
778 |
|
|
779 |
#ifdef KSSL_DEBUG
|
|
780 |
printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
|
|
781 |
#endif /* KSSL_DEBUG */
|
|
782 |
|
|
783 |
/* Setup the stuff to munge */
|
|
784 |
memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
|
|
785 |
TLS_MD_MASTER_SECRET_CONST_SIZE);
|
|
786 |
memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
|
|
787 |
s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
788 |
memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
|
|
789 |
s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
790 |
tls1_PRF(s->ctx->md5,s->ctx->sha1,
|
|
791 |
buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
|
|
792 |
s->session->master_key,buff,sizeof buff);
|
|
793 |
#ifdef KSSL_DEBUG
|
|
794 |
printf ("tls1_generate_master_secret() complete\n");
|
|
795 |
#endif /* KSSL_DEBUG */
|
|
796 |
return(SSL3_MASTER_SECRET_SIZE);
|
|
797 |
}
|
|
798 |
|
|
799 |
int tls1_alert_code(int code)
|
|
800 |
{
|
|
801 |
switch (code)
|
|
802 |
{
|
|
803 |
case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
|
|
804 |
case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
|
|
805 |
case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
|
|
806 |
case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
|
|
807 |
case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
|
|
808 |
case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
|
|
809 |
case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
810 |
case SSL_AD_NO_CERTIFICATE: return(-1);
|
|
811 |
case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
|
|
812 |
case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
|
|
813 |
case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
|
|
814 |
case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
|
|
815 |
case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
|
|
816 |
case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
|
|
817 |
case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
|
|
818 |
case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
|
|
819 |
case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
|
|
820 |
case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
|
|
821 |
case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
|
|
822 |
case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
|
|
823 |
case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
|
|
824 |
case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
|
|
825 |
case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
|
|
826 |
case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
|
|
827 |
case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
|
|
828 |
(DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
|
|
829 |
default: return(-1);
|
|
830 |
}
|
|
831 |
}
|
|
832 |
|