sl@0: /* ssl/s3_enc.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@openssl.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include <stdio.h>
sl@0: #include "ssl_locl.h"
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/md5.h>
sl@0: 
sl@0: #ifndef EMULATOR
sl@0: 	static unsigned char ssl3_pad_1[48]={
sl@0: #else
sl@0: 	static const unsigned char ssl3_pad_1[48]={
sl@0: #endif
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
sl@0: 	0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
sl@0: 
sl@0: #ifndef EMULATOR
sl@0: 	static unsigned char ssl3_pad_2[48]={
sl@0: #else
sl@0: 	static const unsigned char ssl3_pad_2[48]={
sl@0: #endif
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
sl@0: 	0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
sl@0: 
sl@0: static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
sl@0: 	const char *sender, int len, unsigned char *p);
sl@0: 
sl@0: static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
sl@0: 	{
sl@0: 	EVP_MD_CTX m5;
sl@0: 	EVP_MD_CTX s1;
sl@0: 	unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
sl@0: 	unsigned char c='A';
sl@0: 	unsigned int i,j,k;
sl@0: 
sl@0: #ifdef CHARSET_EBCDIC
sl@0: 	c = os_toascii[c]; /*'A' in ASCII */
sl@0: #endif
sl@0: 	k=0;
sl@0: 	EVP_MD_CTX_init(&m5);
sl@0: 	EVP_MD_CTX_init(&s1);
sl@0: 	for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
sl@0: 		{
sl@0: 		k++;
sl@0: 		if (k > sizeof buf)
sl@0: 			{
sl@0: 			/* bug: 'buf' is too small for this ciphersuite */
sl@0: 			SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
sl@0: 			return 0;
sl@0: 			}
sl@0: 		
sl@0: 		for (j=0; j<k; j++)
sl@0: 			buf[j]=c;
sl@0: 		c++;
sl@0: 		EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
sl@0: 		EVP_DigestUpdate(&s1,buf,k);
sl@0: 		EVP_DigestUpdate(&s1,s->session->master_key,
sl@0: 			s->session->master_key_length);
sl@0: 		EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestFinal_ex(&s1,smd,NULL);
sl@0: 
sl@0: 		EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
sl@0: 		EVP_DigestUpdate(&m5,s->session->master_key,
sl@0: 			s->session->master_key_length);
sl@0: 		EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
sl@0: 		if ((int)(i+MD5_DIGEST_LENGTH) > num)
sl@0: 			{
sl@0: 			EVP_DigestFinal_ex(&m5,smd,NULL);
sl@0: 			memcpy(km,smd,(num-i));
sl@0: 			}
sl@0: 		else
sl@0: 			EVP_DigestFinal_ex(&m5,km,NULL);
sl@0: 
sl@0: 		km+=MD5_DIGEST_LENGTH;
sl@0: 		}
sl@0: 	OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
sl@0: 	EVP_MD_CTX_cleanup(&m5);
sl@0: 	EVP_MD_CTX_cleanup(&s1);
sl@0: 	return 1;
sl@0: 	}
sl@0: 
sl@0: int ssl3_change_cipher_state(SSL *s, int which)
sl@0: 	{
sl@0: 	unsigned char *p,*key_block,*mac_secret;
sl@0: 	unsigned char exp_key[EVP_MAX_KEY_LENGTH];
sl@0: 	unsigned char exp_iv[EVP_MAX_IV_LENGTH];
sl@0: 	unsigned char *ms,*key,*iv,*er1,*er2;
sl@0: 	EVP_CIPHER_CTX *dd;
sl@0: 	const EVP_CIPHER *c;
sl@0: #ifndef OPENSSL_NO_COMP
sl@0: 	COMP_METHOD *comp;
sl@0: #endif
sl@0: 	const EVP_MD *m;
sl@0: 	EVP_MD_CTX md;
sl@0: 	int is_exp,n,i,j,k,cl;
sl@0: 	int reuse_dd = 0;
sl@0: 
sl@0: 	is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
sl@0: 	c=s->s3->tmp.new_sym_enc;
sl@0: 	m=s->s3->tmp.new_hash;
sl@0: #ifndef OPENSSL_NO_COMP
sl@0: 	if (s->s3->tmp.new_compression == NULL)
sl@0: 		comp=NULL;
sl@0: 	else
sl@0: 		comp=s->s3->tmp.new_compression->method;
sl@0: #endif
sl@0: 	key_block=s->s3->tmp.key_block;
sl@0: 
sl@0: 	if (which & SSL3_CC_READ)
sl@0: 		{
sl@0: 		if (s->enc_read_ctx != NULL)
sl@0: 			reuse_dd = 1;
sl@0: 		else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
sl@0: 			goto err;
sl@0: 		else
sl@0: 			/* make sure it's intialized in case we exit later with an error */
sl@0: 			EVP_CIPHER_CTX_init(s->enc_read_ctx);
sl@0: 		dd= s->enc_read_ctx;
sl@0: 		s->read_hash=m;
sl@0: #ifndef OPENSSL_NO_COMP
sl@0: 		/* COMPRESS */
sl@0: 		if (s->expand != NULL)
sl@0: 			{
sl@0: 			COMP_CTX_free(s->expand);
sl@0: 			s->expand=NULL;
sl@0: 			}
sl@0: 		if (comp != NULL)
sl@0: 			{
sl@0: 			s->expand=COMP_CTX_new(comp);
sl@0: 			if (s->expand == NULL)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
sl@0: 				goto err2;
sl@0: 				}
sl@0: 			if (s->s3->rrec.comp == NULL)
sl@0: 				s->s3->rrec.comp=(unsigned char *)
sl@0: 					OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
sl@0: 			if (s->s3->rrec.comp == NULL)
sl@0: 				goto err;
sl@0: 			}
sl@0: #endif
sl@0: 		memset(&(s->s3->read_sequence[0]),0,8);
sl@0: 		mac_secret= &(s->s3->read_mac_secret[0]);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		if (s->enc_write_ctx != NULL)
sl@0: 			reuse_dd = 1;
sl@0: 		else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
sl@0: 			goto err;
sl@0: 		else
sl@0: 			/* make sure it's intialized in case we exit later with an error */
sl@0: 			EVP_CIPHER_CTX_init(s->enc_write_ctx);
sl@0: 		dd= s->enc_write_ctx;
sl@0: 		
sl@0: 				
sl@0: 		s->write_hash=m;
sl@0: #ifndef OPENSSL_NO_COMP
sl@0: 		/* COMPRESS */
sl@0: 		if (s->compress != NULL)
sl@0: 			{
sl@0: 			COMP_CTX_free(s->compress);
sl@0: 			s->compress=NULL;
sl@0: 			}
sl@0: 		if (comp != NULL)
sl@0: 			{
sl@0: 			s->compress=COMP_CTX_new(comp);
sl@0: 			if (s->compress == NULL)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
sl@0: 				goto err2;
sl@0: 				}
sl@0: 			}
sl@0: #endif
sl@0: 		memset(&(s->s3->write_sequence[0]),0,8);
sl@0: 		mac_secret= &(s->s3->write_mac_secret[0]);
sl@0: 		}
sl@0: 
sl@0: 	if (reuse_dd)
sl@0: 		EVP_CIPHER_CTX_cleanup(dd);
sl@0: 
sl@0: 	p=s->s3->tmp.key_block;
sl@0: 	i=EVP_MD_size(m);
sl@0: 	cl=EVP_CIPHER_key_length(c);
sl@0: 	j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
sl@0: 		 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
sl@0: 	/* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
sl@0: 	k=EVP_CIPHER_iv_length(c);
sl@0: 	if (	(which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
sl@0: 		(which == SSL3_CHANGE_CIPHER_SERVER_READ))
sl@0: 		{
sl@0: 		ms=  &(p[ 0]); n=i+i;
sl@0: 		key= &(p[ n]); n+=j+j;
sl@0: 		iv=  &(p[ n]); n+=k+k;
sl@0: 		er1= &(s->s3->client_random[0]);
sl@0: 		er2= &(s->s3->server_random[0]);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		n=i;
sl@0: 		ms=  &(p[ n]); n+=i+j;
sl@0: 		key= &(p[ n]); n+=j+k;
sl@0: 		iv=  &(p[ n]); n+=k;
sl@0: 		er1= &(s->s3->server_random[0]);
sl@0: 		er2= &(s->s3->client_random[0]);
sl@0: 		}
sl@0: 
sl@0: 	if (n > s->s3->tmp.key_block_length)
sl@0: 		{
sl@0: 		SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
sl@0: 		goto err2;
sl@0: 		}
sl@0: 
sl@0: 	EVP_MD_CTX_init(&md);
sl@0: 	memcpy(mac_secret,ms,i);
sl@0: 	if (is_exp)
sl@0: 		{
sl@0: 		/* In here I set both the read and write key/iv to the
sl@0: 		 * same value since only the correct one will be used :-).
sl@0: 		 */
sl@0: 		EVP_DigestInit_ex(&md,EVP_md5(), NULL);
sl@0: 		EVP_DigestUpdate(&md,key,j);
sl@0: 		EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
sl@0: 		key= &(exp_key[0]);
sl@0: 
sl@0: 		if (k > 0)
sl@0: 			{
sl@0: 			EVP_DigestInit_ex(&md,EVP_md5(), NULL);
sl@0: 			EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
sl@0: 			EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
sl@0: 			EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
sl@0: 			iv= &(exp_iv[0]);
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	s->session->key_arg_length=0;
sl@0: 
sl@0: 	EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
sl@0: 
sl@0: 	OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
sl@0: 	OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
sl@0: 	EVP_MD_CTX_cleanup(&md);
sl@0: 	return(1);
sl@0: err:
sl@0: 	SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
sl@0: err2:
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: int ssl3_setup_key_block(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p;
sl@0: 	const EVP_CIPHER *c;
sl@0: 	const EVP_MD *hash;
sl@0: 	int num;
sl@0: 	int ret = 0;
sl@0: 	SSL_COMP *comp;
sl@0: 
sl@0: 	if (s->s3->tmp.key_block_length != 0)
sl@0: 		return(1);
sl@0: 
sl@0: 	if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
sl@0: 		{
sl@0: 		SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
sl@0: 		return(0);
sl@0: 		}
sl@0: 
sl@0: 	s->s3->tmp.new_sym_enc=c;
sl@0: 	s->s3->tmp.new_hash=hash;
sl@0: #ifdef OPENSSL_NO_COMP
sl@0: 	s->s3->tmp.new_compression=NULL;
sl@0: #else
sl@0: 	s->s3->tmp.new_compression=comp;
sl@0: #endif
sl@0: 
sl@0: 	num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
sl@0: 	num*=2;
sl@0: 
sl@0: 	ssl3_cleanup_key_block(s);
sl@0: 
sl@0: 	if ((p=OPENSSL_malloc(num)) == NULL)
sl@0: 		goto err;
sl@0: 
sl@0: 	s->s3->tmp.key_block_length=num;
sl@0: 	s->s3->tmp.key_block=p;
sl@0: 
sl@0: 	ret = ssl3_generate_key_block(s,p,num);
sl@0: 
sl@0: 	if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
sl@0: 		{
sl@0: 		/* enable vulnerability countermeasure for CBC ciphers with
sl@0: 		 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
sl@0: 		 */
sl@0: 		s->s3->need_empty_fragments = 1;
sl@0: 
sl@0: 		if (s->session->cipher != NULL)
sl@0: 			{
sl@0: 			if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
sl@0: 				s->s3->need_empty_fragments = 0;
sl@0: 			
sl@0: #ifndef OPENSSL_NO_RC4
sl@0: 			if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
sl@0: 				s->s3->need_empty_fragments = 0;
sl@0: #endif
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	return ret;
sl@0: 		
sl@0: err:
sl@0: 	SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: void ssl3_cleanup_key_block(SSL *s)
sl@0: 	{
sl@0: 	if (s->s3->tmp.key_block != NULL)
sl@0: 		{
sl@0: 		OPENSSL_cleanse(s->s3->tmp.key_block,
sl@0: 			s->s3->tmp.key_block_length);
sl@0: 		OPENSSL_free(s->s3->tmp.key_block);
sl@0: 		s->s3->tmp.key_block=NULL;
sl@0: 		}
sl@0: 	s->s3->tmp.key_block_length=0;
sl@0: 	}
sl@0: 
sl@0: int ssl3_enc(SSL *s, int send)
sl@0: 	{
sl@0: 	SSL3_RECORD *rec;
sl@0: 	EVP_CIPHER_CTX *ds;
sl@0: 	unsigned long l;
sl@0: 	int bs,i;
sl@0: 	const EVP_CIPHER *enc;
sl@0: 
sl@0: 	if (send)
sl@0: 		{
sl@0: 		ds=s->enc_write_ctx;
sl@0: 		rec= &(s->s3->wrec);
sl@0: 		if (s->enc_write_ctx == NULL)
sl@0: 			enc=NULL;
sl@0: 		else
sl@0: 			enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		ds=s->enc_read_ctx;
sl@0: 		rec= &(s->s3->rrec);
sl@0: 		if (s->enc_read_ctx == NULL)
sl@0: 			enc=NULL;
sl@0: 		else
sl@0: 			enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
sl@0: 		}
sl@0: 
sl@0: 	if ((s->session == NULL) || (ds == NULL) ||
sl@0: 		(enc == NULL))
sl@0: 		{
sl@0: 		memmove(rec->data,rec->input,rec->length);
sl@0: 		rec->input=rec->data;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		l=rec->length;
sl@0: 		bs=EVP_CIPHER_block_size(ds->cipher);
sl@0: 
sl@0: 		/* COMPRESS */
sl@0: 
sl@0: 		if ((bs != 1) && send)
sl@0: 			{
sl@0: 			i=bs-((int)l%bs);
sl@0: 
sl@0: 			/* we need to add 'i-1' padding bytes */
sl@0: 			l+=i;
sl@0: 			rec->length+=i;
sl@0: 			rec->input[l-1]=(i-1);
sl@0: 			}
sl@0: 		
sl@0: 		if (!send)
sl@0: 			{
sl@0: 			if (l == 0 || l%bs != 0)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
sl@0: 				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
sl@0: 				return 0;
sl@0: 				}
sl@0: 			/* otherwise, rec->length >= bs */
sl@0: 			}
sl@0: 		
sl@0: 		EVP_Cipher(ds,rec->data,rec->input,l);
sl@0: 
sl@0: 		if ((bs != 1) && !send)
sl@0: 			{
sl@0: 			i=rec->data[l-1]+1;
sl@0: 			/* SSL 3.0 bounds the number of padding bytes by the block size;
sl@0: 			 * padding bytes (except the last one) are arbitrary */
sl@0: 			if (i > bs)
sl@0: 				{
sl@0: 				/* Incorrect padding. SSLerr() and ssl3_alert are done
sl@0: 				 * by caller: we don't want to reveal whether this is
sl@0: 				 * a decryption error or a MAC verification failure
sl@0: 				 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
sl@0: 				return -1;
sl@0: 				}
sl@0: 			/* now i <= bs <= rec->length */
sl@0: 			rec->length-=i;
sl@0: 			}
sl@0: 		}
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: void ssl3_init_finished_mac(SSL *s)
sl@0: 	{
sl@0: 	EVP_DigestInit_ex(&(s->s3->finish_dgst1),s->ctx->md5, NULL);
sl@0: 	EVP_DigestInit_ex(&(s->s3->finish_dgst2),s->ctx->sha1, NULL);
sl@0: 	}
sl@0: 
sl@0: void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
sl@0: 	{
sl@0: 	EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len);
sl@0: 	EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len);
sl@0: 	}
sl@0: 
sl@0: int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p)
sl@0: 	{
sl@0: 	return(ssl3_handshake_mac(s,ctx,NULL,0,p));
sl@0: 	}
sl@0: 
sl@0: int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2,
sl@0: 	     const char *sender, int len, unsigned char *p)
sl@0: 	{
sl@0: 	int ret;
sl@0: 
sl@0: 	ret=ssl3_handshake_mac(s,ctx1,sender,len,p);
sl@0: 	p+=ret;
sl@0: 	ret+=ssl3_handshake_mac(s,ctx2,sender,len,p);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
sl@0: 	     const char *sender, int len, unsigned char *p)
sl@0: 	{
sl@0: 	unsigned int ret;
sl@0: 	int npad,n;
sl@0: 	unsigned int i;
sl@0: 	unsigned char md_buf[EVP_MAX_MD_SIZE];
sl@0: 	EVP_MD_CTX ctx;
sl@0: 
sl@0: 	EVP_MD_CTX_init(&ctx);
sl@0: 	EVP_MD_CTX_copy_ex(&ctx,in_ctx);
sl@0: 
sl@0: 	n=EVP_MD_CTX_size(&ctx);
sl@0: 	npad=(48/n)*n;
sl@0: 
sl@0: 	if (sender != NULL)
sl@0: 		EVP_DigestUpdate(&ctx,sender,len);
sl@0: 	EVP_DigestUpdate(&ctx,s->session->master_key,
sl@0: 		s->session->master_key_length);
sl@0: 	EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
sl@0: 	EVP_DigestFinal_ex(&ctx,md_buf,&i);
sl@0: 
sl@0: 	EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
sl@0: 	EVP_DigestUpdate(&ctx,s->session->master_key,
sl@0: 		s->session->master_key_length);
sl@0: 	EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
sl@0: 	EVP_DigestUpdate(&ctx,md_buf,i);
sl@0: 	EVP_DigestFinal_ex(&ctx,p,&ret);
sl@0: 
sl@0: 	EVP_MD_CTX_cleanup(&ctx);
sl@0: 
sl@0: 	return((int)ret);
sl@0: 	}
sl@0: 
sl@0: int ssl3_mac(SSL *ssl, unsigned char *md, int send)
sl@0: 	{
sl@0: 	SSL3_RECORD *rec;
sl@0: 	unsigned char *mac_sec,*seq;
sl@0: 	EVP_MD_CTX md_ctx;
sl@0: 	const EVP_MD *hash;
sl@0: 	unsigned char *p,rec_char;
sl@0: 	unsigned int md_size;
sl@0: 	int npad;
sl@0: 
sl@0: 	if (send)
sl@0: 		{
sl@0: 		rec= &(ssl->s3->wrec);
sl@0: 		mac_sec= &(ssl->s3->write_mac_secret[0]);
sl@0: 		seq= &(ssl->s3->write_sequence[0]);
sl@0: 		hash=ssl->write_hash;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		rec= &(ssl->s3->rrec);
sl@0: 		mac_sec= &(ssl->s3->read_mac_secret[0]);
sl@0: 		seq= &(ssl->s3->read_sequence[0]);
sl@0: 		hash=ssl->read_hash;
sl@0: 		}
sl@0: 
sl@0: 	md_size=EVP_MD_size(hash);
sl@0: 	npad=(48/md_size)*md_size;
sl@0: 
sl@0: 	/* Chop the digest off the end :-) */
sl@0: 	EVP_MD_CTX_init(&md_ctx);
sl@0: 
sl@0: 	EVP_DigestInit_ex(  &md_ctx,hash, NULL);
sl@0: 	EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
sl@0: 	EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
sl@0: 	EVP_DigestUpdate(&md_ctx,seq,8);
sl@0: 	rec_char=rec->type;
sl@0: 	EVP_DigestUpdate(&md_ctx,&rec_char,1);
sl@0: 	p=md;
sl@0: 	s2n(rec->length,p);
sl@0: 	EVP_DigestUpdate(&md_ctx,md,2);
sl@0: 	EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
sl@0: 	EVP_DigestFinal_ex( &md_ctx,md,NULL);
sl@0: 
sl@0: 	EVP_DigestInit_ex(  &md_ctx,hash, NULL);
sl@0: 	EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
sl@0: 	EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
sl@0: 	EVP_DigestUpdate(&md_ctx,md,md_size);
sl@0: 	EVP_DigestFinal_ex( &md_ctx,md,&md_size);
sl@0: 
sl@0: 	EVP_MD_CTX_cleanup(&md_ctx);
sl@0: 
sl@0: 	ssl3_record_sequence_update(seq);
sl@0: 	return(md_size);
sl@0: 	}
sl@0: 
sl@0: void ssl3_record_sequence_update(unsigned char *seq)
sl@0: 	{
sl@0: 	int i;
sl@0: 
sl@0: 	for (i=7; i>=0; i--)
sl@0: 		{
sl@0: 		++seq[i];
sl@0: 		if (seq[i] != 0) break; 
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
sl@0: 	     int len)
sl@0: 	{
sl@0: #ifndef EMULATOR	
sl@0: 		static const unsigned char *salt[3]={
sl@0: #else
sl@0: 		static const unsigned char *const salt[3]={
sl@0: #endif
sl@0: 
sl@0: #ifndef CHARSET_EBCDIC
sl@0: 		(const unsigned char *)"A",
sl@0: 		(const unsigned char *)"BB",
sl@0: 		(const unsigned char *)"CCC",
sl@0: #else
sl@0: 		(const unsigned char *)"\x41",
sl@0: 		(const unsigned char *)"\x42\x42",
sl@0: 		(const unsigned char *)"\x43\x43\x43",
sl@0: #endif
sl@0: 		};
sl@0: 	unsigned char buf[EVP_MAX_MD_SIZE];
sl@0: 	EVP_MD_CTX ctx;
sl@0: 	int i,ret=0;
sl@0: 	unsigned int n;
sl@0: 
sl@0: 	EVP_MD_CTX_init(&ctx);
sl@0: 	for (i=0; i<3; i++)
sl@0: 		{
sl@0: 		EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
sl@0: 		EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
sl@0: 		EVP_DigestUpdate(&ctx,p,len);
sl@0: 		EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
sl@0: 			SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
sl@0: 			SSL3_RANDOM_SIZE);
sl@0: 		EVP_DigestFinal_ex(&ctx,buf,&n);
sl@0: 
sl@0: 		EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
sl@0: 		EVP_DigestUpdate(&ctx,p,len);
sl@0: 		EVP_DigestUpdate(&ctx,buf,n);
sl@0: 		EVP_DigestFinal_ex(&ctx,out,&n);
sl@0: 		out+=n;
sl@0: 		ret+=n;
sl@0: 		}
sl@0: 	EVP_MD_CTX_cleanup(&ctx);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: int ssl3_alert_code(int code)
sl@0: 	{
sl@0: 	switch (code)
sl@0: 		{
sl@0: 	case SSL_AD_CLOSE_NOTIFY:	return(SSL3_AD_CLOSE_NOTIFY);
sl@0: 	case SSL_AD_UNEXPECTED_MESSAGE:	return(SSL3_AD_UNEXPECTED_MESSAGE);
sl@0: 	case SSL_AD_BAD_RECORD_MAC:	return(SSL3_AD_BAD_RECORD_MAC);
sl@0: 	case SSL_AD_DECRYPTION_FAILED:	return(SSL3_AD_BAD_RECORD_MAC);
sl@0: 	case SSL_AD_RECORD_OVERFLOW:	return(SSL3_AD_BAD_RECORD_MAC);
sl@0: 	case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
sl@0: 	case SSL_AD_HANDSHAKE_FAILURE:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_NO_CERTIFICATE:	return(SSL3_AD_NO_CERTIFICATE);
sl@0: 	case SSL_AD_BAD_CERTIFICATE:	return(SSL3_AD_BAD_CERTIFICATE);
sl@0: 	case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
sl@0: 	case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
sl@0: 	case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
sl@0: 	case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
sl@0: 	case SSL_AD_ILLEGAL_PARAMETER:	return(SSL3_AD_ILLEGAL_PARAMETER);
sl@0: 	case SSL_AD_UNKNOWN_CA:		return(SSL3_AD_BAD_CERTIFICATE);
sl@0: 	case SSL_AD_ACCESS_DENIED:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_DECODE_ERROR:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_DECRYPT_ERROR:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_EXPORT_RESTRICTION:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_PROTOCOL_VERSION:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_INTERNAL_ERROR:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_USER_CANCELLED:	return(SSL3_AD_HANDSHAKE_FAILURE);
sl@0: 	case SSL_AD_NO_RENEGOTIATION:	return(-1); /* Don't send it :-) */
sl@0: 	default:			return(-1);
sl@0: 		}
sl@0: 	}
sl@0: