815 lines
24 KiB
C
815 lines
24 KiB
C
/* ssl/t1_enc.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@openssl.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "ssl_locl.h"
|
|
#include <openssl/comp.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/hmac.h>
|
|
#include <openssl/md5.h>
|
|
|
|
static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
|
|
int sec_len, unsigned char *seed, int seed_len,
|
|
unsigned char *out, int olen)
|
|
{
|
|
int chunk,n;
|
|
unsigned int j;
|
|
HMAC_CTX ctx;
|
|
HMAC_CTX ctx_tmp;
|
|
unsigned char A1[EVP_MAX_MD_SIZE];
|
|
unsigned int A1_len;
|
|
|
|
chunk=EVP_MD_size(md);
|
|
|
|
HMAC_CTX_init(&ctx);
|
|
HMAC_CTX_init(&ctx_tmp);
|
|
HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
|
|
HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
|
|
HMAC_Update(&ctx,seed,seed_len);
|
|
HMAC_Final(&ctx,A1,&A1_len);
|
|
|
|
n=0;
|
|
for (;;)
|
|
{
|
|
HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
|
|
HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
|
|
HMAC_Update(&ctx,A1,A1_len);
|
|
HMAC_Update(&ctx_tmp,A1,A1_len);
|
|
HMAC_Update(&ctx,seed,seed_len);
|
|
|
|
if (olen > chunk)
|
|
{
|
|
HMAC_Final(&ctx,out,&j);
|
|
out+=j;
|
|
olen-=j;
|
|
HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
|
|
}
|
|
else /* last one */
|
|
{
|
|
HMAC_Final(&ctx,A1,&A1_len);
|
|
memcpy(out,A1,olen);
|
|
break;
|
|
}
|
|
}
|
|
HMAC_CTX_cleanup(&ctx);
|
|
HMAC_CTX_cleanup(&ctx_tmp);
|
|
OPENSSL_cleanse(A1,sizeof(A1));
|
|
}
|
|
|
|
static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
|
|
unsigned char *label, int label_len,
|
|
const unsigned char *sec, int slen, unsigned char *out1,
|
|
unsigned char *out2, int olen)
|
|
{
|
|
int len,i;
|
|
const unsigned char *S1,*S2;
|
|
|
|
len=slen/2;
|
|
S1=sec;
|
|
S2= &(sec[len]);
|
|
len+=(slen&1); /* add for odd, make longer */
|
|
|
|
|
|
tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
|
|
tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
|
|
|
|
for (i=0; i<olen; i++)
|
|
out1[i]^=out2[i];
|
|
}
|
|
|
|
static void tls1_generate_key_block(SSL *s, unsigned char *km,
|
|
unsigned char *tmp, int num)
|
|
{
|
|
unsigned char *p;
|
|
unsigned char buf[SSL3_RANDOM_SIZE*2+
|
|
TLS_MD_MAX_CONST_SIZE];
|
|
p=buf;
|
|
|
|
memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
|
|
TLS_MD_KEY_EXPANSION_CONST_SIZE);
|
|
p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
|
|
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
|
|
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
|
|
s->session->master_key,s->session->master_key_length,
|
|
km,tmp,num);
|
|
#ifdef KSSL_DEBUG
|
|
printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
|
|
s->session->master_key_length);
|
|
{
|
|
int i;
|
|
for (i=0; i < s->session->master_key_length; i++)
|
|
{
|
|
printf("%02X", s->session->master_key[i]);
|
|
}
|
|
printf("\n"); }
|
|
#endif /* KSSL_DEBUG */
|
|
}
|
|
|
|
int tls1_change_cipher_state(SSL *s, int which)
|
|
{
|
|
static const unsigned char empty[]="";
|
|
unsigned char *p,*key_block,*mac_secret;
|
|
unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
|
|
SSL3_RANDOM_SIZE*2];
|
|
unsigned char tmp1[EVP_MAX_KEY_LENGTH];
|
|
unsigned char tmp2[EVP_MAX_KEY_LENGTH];
|
|
unsigned char iv1[EVP_MAX_IV_LENGTH*2];
|
|
unsigned char iv2[EVP_MAX_IV_LENGTH*2];
|
|
unsigned char *ms,*key,*iv,*er1,*er2;
|
|
int client_write;
|
|
EVP_CIPHER_CTX *dd;
|
|
const EVP_CIPHER *c;
|
|
const SSL_COMP *comp;
|
|
const EVP_MD *m;
|
|
int is_export,n,i,j,k,exp_label_len,cl;
|
|
int reuse_dd = 0;
|
|
|
|
is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
|
|
c=s->s3->tmp.new_sym_enc;
|
|
m=s->s3->tmp.new_hash;
|
|
comp=s->s3->tmp.new_compression;
|
|
key_block=s->s3->tmp.key_block;
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf("tls1_change_cipher_state(which= %d) w/\n", which);
|
|
printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms,
|
|
comp);
|
|
printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
|
|
printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
|
|
c->nid,c->block_size,c->key_len,c->iv_len);
|
|
printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
|
|
{
|
|
int i;
|
|
for (i=0; i<s->s3->tmp.key_block_length; i++)
|
|
printf("%02x", key_block[i]); printf("\n");
|
|
}
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if (which & SSL3_CC_READ)
|
|
{
|
|
if (s->enc_read_ctx != NULL)
|
|
reuse_dd = 1;
|
|
else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
|
|
goto err;
|
|
dd= s->enc_read_ctx;
|
|
s->read_hash=m;
|
|
if (s->expand != NULL)
|
|
{
|
|
COMP_CTX_free(s->expand);
|
|
s->expand=NULL;
|
|
}
|
|
if (comp != NULL)
|
|
{
|
|
s->expand=COMP_CTX_new(comp->method);
|
|
if (s->expand == NULL)
|
|
{
|
|
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
|
|
goto err2;
|
|
}
|
|
if (s->s3->rrec.comp == NULL)
|
|
s->s3->rrec.comp=(unsigned char *)
|
|
OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
|
|
if (s->s3->rrec.comp == NULL)
|
|
goto err;
|
|
}
|
|
memset(&(s->s3->read_sequence[0]),0,8);
|
|
mac_secret= &(s->s3->read_mac_secret[0]);
|
|
}
|
|
else
|
|
{
|
|
if (s->enc_write_ctx != NULL)
|
|
reuse_dd = 1;
|
|
else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
|
|
goto err;
|
|
if ((s->enc_write_ctx == NULL) &&
|
|
((s->enc_write_ctx=(EVP_CIPHER_CTX *)
|
|
OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
|
|
goto err;
|
|
dd= s->enc_write_ctx;
|
|
s->write_hash=m;
|
|
if (s->compress != NULL)
|
|
{
|
|
COMP_CTX_free(s->compress);
|
|
s->compress=NULL;
|
|
}
|
|
if (comp != NULL)
|
|
{
|
|
s->compress=COMP_CTX_new(comp->method);
|
|
if (s->compress == NULL)
|
|
{
|
|
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
|
|
goto err2;
|
|
}
|
|
}
|
|
memset(&(s->s3->write_sequence[0]),0,8);
|
|
mac_secret= &(s->s3->write_mac_secret[0]);
|
|
}
|
|
|
|
if (reuse_dd)
|
|
EVP_CIPHER_CTX_cleanup(dd);
|
|
EVP_CIPHER_CTX_init(dd);
|
|
|
|
p=s->s3->tmp.key_block;
|
|
i=EVP_MD_size(m);
|
|
cl=EVP_CIPHER_key_length(c);
|
|
j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
|
|
cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
|
|
/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
|
|
k=EVP_CIPHER_iv_length(c);
|
|
er1= &(s->s3->client_random[0]);
|
|
er2= &(s->s3->server_random[0]);
|
|
if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
|
|
(which == SSL3_CHANGE_CIPHER_SERVER_READ))
|
|
{
|
|
ms= &(p[ 0]); n=i+i;
|
|
key= &(p[ n]); n+=j+j;
|
|
iv= &(p[ n]); n+=k+k;
|
|
exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
|
|
exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
|
|
client_write=1;
|
|
}
|
|
else
|
|
{
|
|
n=i;
|
|
ms= &(p[ n]); n+=i+j;
|
|
key= &(p[ n]); n+=j+k;
|
|
iv= &(p[ n]); n+=k;
|
|
exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
|
|
exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
|
|
client_write=0;
|
|
}
|
|
|
|
if (n > s->s3->tmp.key_block_length)
|
|
{
|
|
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
|
|
goto err2;
|
|
}
|
|
|
|
memcpy(mac_secret,ms,i);
|
|
#ifdef TLS_DEBUG
|
|
printf("which = %04X\nmac key=",which);
|
|
{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
|
|
#endif
|
|
if (is_export)
|
|
{
|
|
/* In here I set both the read and write key/iv to the
|
|
* same value since only the correct one will be used :-).
|
|
*/
|
|
p=buf;
|
|
memcpy(p,exp_label,exp_label_len);
|
|
p+=exp_label_len;
|
|
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
|
|
tmp1,tmp2,EVP_CIPHER_key_length(c));
|
|
key=tmp1;
|
|
|
|
if (k > 0)
|
|
{
|
|
p=buf;
|
|
memcpy(p,TLS_MD_IV_BLOCK_CONST,
|
|
TLS_MD_IV_BLOCK_CONST_SIZE);
|
|
p+=TLS_MD_IV_BLOCK_CONST_SIZE;
|
|
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
|
|
iv1,iv2,k*2);
|
|
if (client_write)
|
|
iv=iv1;
|
|
else
|
|
iv= &(iv1[k]);
|
|
}
|
|
}
|
|
|
|
s->session->key_arg_length=0;
|
|
#ifdef KSSL_DEBUG
|
|
{
|
|
int i;
|
|
printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
|
|
printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
|
|
printf("\n");
|
|
printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
|
|
printf("\n");
|
|
}
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
|
|
#ifdef TLS_DEBUG
|
|
printf("which = %04X\nkey=",which);
|
|
{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
|
|
printf("\niv=");
|
|
{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
|
|
printf("\n");
|
|
#endif
|
|
|
|
OPENSSL_cleanse(tmp1,sizeof(tmp1));
|
|
OPENSSL_cleanse(tmp2,sizeof(tmp1));
|
|
OPENSSL_cleanse(iv1,sizeof(iv1));
|
|
OPENSSL_cleanse(iv2,sizeof(iv2));
|
|
return(1);
|
|
err:
|
|
SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
|
|
err2:
|
|
return(0);
|
|
}
|
|
|
|
int tls1_setup_key_block(SSL *s)
|
|
{
|
|
unsigned char *p1,*p2;
|
|
const EVP_CIPHER *c;
|
|
const EVP_MD *hash;
|
|
int num;
|
|
SSL_COMP *comp;
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf ("tls1_setup_key_block()\n");
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if (s->s3->tmp.key_block_length != 0)
|
|
return(1);
|
|
|
|
if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
|
|
{
|
|
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
|
|
return(0);
|
|
}
|
|
|
|
s->s3->tmp.new_sym_enc=c;
|
|
s->s3->tmp.new_hash=hash;
|
|
|
|
num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
|
|
num*=2;
|
|
|
|
ssl3_cleanup_key_block(s);
|
|
|
|
if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
|
|
goto err;
|
|
if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
|
|
goto err;
|
|
|
|
s->s3->tmp.key_block_length=num;
|
|
s->s3->tmp.key_block=p1;
|
|
|
|
|
|
#ifdef TLS_DEBUG
|
|
printf("client random\n");
|
|
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
|
|
printf("server random\n");
|
|
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
|
|
printf("pre-master\n");
|
|
{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
|
|
#endif
|
|
tls1_generate_key_block(s,p1,p2,num);
|
|
OPENSSL_cleanse(p2,num);
|
|
OPENSSL_free(p2);
|
|
#ifdef TLS_DEBUG
|
|
printf("\nkey block\n");
|
|
{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
|
|
#endif
|
|
|
|
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
|
|
{
|
|
/* enable vulnerability countermeasure for CBC ciphers with
|
|
* known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
|
|
*/
|
|
s->s3->need_empty_fragments = 1;
|
|
|
|
if (s->session->cipher != NULL)
|
|
{
|
|
if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
|
|
s->s3->need_empty_fragments = 0;
|
|
|
|
#ifndef OPENSSL_NO_RC4
|
|
if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
|
|
s->s3->need_empty_fragments = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return(1);
|
|
err:
|
|
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
|
|
return(0);
|
|
}
|
|
|
|
int tls1_enc(SSL *s, int send)
|
|
{
|
|
SSL3_RECORD *rec;
|
|
EVP_CIPHER_CTX *ds;
|
|
unsigned long l;
|
|
int bs,i,ii,j,k,n=0;
|
|
const EVP_CIPHER *enc;
|
|
|
|
if (send)
|
|
{
|
|
if (s->write_hash != NULL)
|
|
n=EVP_MD_size(s->write_hash);
|
|
ds=s->enc_write_ctx;
|
|
rec= &(s->s3->wrec);
|
|
if (s->enc_write_ctx == NULL)
|
|
enc=NULL;
|
|
else
|
|
enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
|
|
}
|
|
else
|
|
{
|
|
if (s->read_hash != NULL)
|
|
n=EVP_MD_size(s->read_hash);
|
|
ds=s->enc_read_ctx;
|
|
rec= &(s->s3->rrec);
|
|
if (s->enc_read_ctx == NULL)
|
|
enc=NULL;
|
|
else
|
|
enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
|
|
}
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf("tls1_enc(%d)\n", send);
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if ((s->session == NULL) || (ds == NULL) ||
|
|
(enc == NULL))
|
|
{
|
|
memmove(rec->data,rec->input,rec->length);
|
|
rec->input=rec->data;
|
|
}
|
|
else
|
|
{
|
|
l=rec->length;
|
|
bs=EVP_CIPHER_block_size(ds->cipher);
|
|
|
|
if ((bs != 1) && send)
|
|
{
|
|
i=bs-((int)l%bs);
|
|
|
|
/* Add weird padding of upto 256 bytes */
|
|
|
|
/* we need to add 'i' padding bytes of value j */
|
|
j=i-1;
|
|
if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
|
|
{
|
|
if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
|
|
j++;
|
|
}
|
|
for (k=(int)l; k<(int)(l+i); k++)
|
|
rec->input[k]=j;
|
|
l+=i;
|
|
rec->length+=i;
|
|
}
|
|
|
|
#ifdef KSSL_DEBUG
|
|
{
|
|
unsigned long ui;
|
|
printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
|
|
ds,rec->data,rec->input,l);
|
|
printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
|
|
ds->buf_len, ds->cipher->key_len,
|
|
DES_KEY_SZ, DES_SCHEDULE_SZ,
|
|
ds->cipher->iv_len);
|
|
printf("\t\tIV: ");
|
|
for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
|
|
printf("\n");
|
|
printf("\trec->input=");
|
|
for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
|
|
printf("\n");
|
|
}
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if (!send)
|
|
{
|
|
if (l == 0 || l%bs != 0)
|
|
{
|
|
SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
EVP_Cipher(ds,rec->data,rec->input,l);
|
|
|
|
#ifdef KSSL_DEBUG
|
|
{
|
|
unsigned long i;
|
|
printf("\trec->data=");
|
|
for (i=0; i<l; i++)
|
|
printf(" %02x", rec->data[i]); printf("\n");
|
|
}
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if ((bs != 1) && !send)
|
|
{
|
|
ii=i=rec->data[l-1]; /* padding_length */
|
|
i++;
|
|
if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
|
|
{
|
|
/* First packet is even in size, so check */
|
|
if ((memcmp(s->s3->read_sequence,
|
|
"\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
|
|
s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
|
|
if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
|
|
i--;
|
|
}
|
|
/* TLS 1.0 does not bound the number of padding bytes by the block size.
|
|
* All of them must have value 'padding_length'. */
|
|
if (i > (int)rec->length)
|
|
{
|
|
/* Incorrect padding. SSLerr() and ssl3_alert are done
|
|
* by caller: we don't want to reveal whether this is
|
|
* a decryption error or a MAC verification failure
|
|
* (see http://www.openssl.org/~bodo/tls-cbc.txt) */
|
|
return -1;
|
|
}
|
|
for (j=(int)(l-i); j<(int)l; j++)
|
|
{
|
|
if (rec->data[j] != ii)
|
|
{
|
|
/* Incorrect padding */
|
|
return -1;
|
|
}
|
|
}
|
|
rec->length-=i;
|
|
}
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
|
|
{
|
|
unsigned int ret;
|
|
EVP_MD_CTX ctx;
|
|
|
|
EVP_MD_CTX_init(&ctx);
|
|
EVP_MD_CTX_copy_ex(&ctx,in_ctx);
|
|
EVP_DigestFinal_ex(&ctx,out,&ret);
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
return((int)ret);
|
|
}
|
|
|
|
int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
|
|
const char *str, int slen, unsigned char *out)
|
|
{
|
|
unsigned int i;
|
|
EVP_MD_CTX ctx;
|
|
unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
|
|
unsigned char *q,buf2[12];
|
|
|
|
q=buf;
|
|
memcpy(q,str,slen);
|
|
q+=slen;
|
|
|
|
EVP_MD_CTX_init(&ctx);
|
|
EVP_MD_CTX_copy_ex(&ctx,in1_ctx);
|
|
EVP_DigestFinal_ex(&ctx,q,&i);
|
|
q+=i;
|
|
EVP_MD_CTX_copy_ex(&ctx,in2_ctx);
|
|
EVP_DigestFinal_ex(&ctx,q,&i);
|
|
q+=i;
|
|
|
|
tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
|
|
s->session->master_key,s->session->master_key_length,
|
|
out,buf2,sizeof buf2);
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
|
|
return sizeof buf2;
|
|
}
|
|
|
|
int tls1_mac(SSL *ssl, unsigned char *md, int send)
|
|
{
|
|
SSL3_RECORD *rec;
|
|
unsigned char *mac_sec,*seq;
|
|
const EVP_MD *hash;
|
|
unsigned int md_size;
|
|
int i;
|
|
HMAC_CTX hmac;
|
|
unsigned char buf[5];
|
|
|
|
if (send)
|
|
{
|
|
rec= &(ssl->s3->wrec);
|
|
mac_sec= &(ssl->s3->write_mac_secret[0]);
|
|
seq= &(ssl->s3->write_sequence[0]);
|
|
hash=ssl->write_hash;
|
|
}
|
|
else
|
|
{
|
|
rec= &(ssl->s3->rrec);
|
|
mac_sec= &(ssl->s3->read_mac_secret[0]);
|
|
seq= &(ssl->s3->read_sequence[0]);
|
|
hash=ssl->read_hash;
|
|
}
|
|
|
|
md_size=EVP_MD_size(hash);
|
|
|
|
buf[0]=rec->type;
|
|
buf[1]=TLS1_VERSION_MAJOR;
|
|
buf[2]=TLS1_VERSION_MINOR;
|
|
buf[3]=rec->length>>8;
|
|
buf[4]=rec->length&0xff;
|
|
|
|
/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
|
|
HMAC_CTX_init(&hmac);
|
|
HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
|
|
HMAC_Update(&hmac,seq,8);
|
|
HMAC_Update(&hmac,buf,5);
|
|
HMAC_Update(&hmac,rec->input,rec->length);
|
|
HMAC_Final(&hmac,md,&md_size);
|
|
HMAC_CTX_cleanup(&hmac);
|
|
|
|
#ifdef TLS_DEBUG
|
|
printf("sec=");
|
|
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
|
|
printf("seq=");
|
|
{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
|
|
printf("buf=");
|
|
{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
|
|
printf("rec=");
|
|
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
|
|
#endif
|
|
|
|
for (i=7; i>=0; i--)
|
|
{
|
|
++seq[i];
|
|
if (seq[i] != 0) break;
|
|
}
|
|
|
|
#ifdef TLS_DEBUG
|
|
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
|
|
#endif
|
|
return(md_size);
|
|
}
|
|
|
|
int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
|
|
int len)
|
|
{
|
|
unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
|
|
unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
/* Setup the stuff to munge */
|
|
memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
|
|
TLS_MD_MASTER_SECRET_CONST_SIZE);
|
|
memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
|
|
s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
|
|
s->s3->server_random,SSL3_RANDOM_SIZE);
|
|
tls1_PRF(s->ctx->md5,s->ctx->sha1,
|
|
buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
|
|
s->session->master_key,buff,sizeof buff);
|
|
#ifdef KSSL_DEBUG
|
|
printf ("tls1_generate_master_secret() complete\n");
|
|
#endif /* KSSL_DEBUG */
|
|
return(SSL3_MASTER_SECRET_SIZE);
|
|
}
|
|
|
|
int tls1_alert_code(int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
|
|
case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
|
|
case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
|
|
case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
|
|
case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
|
|
case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
|
|
case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_NO_CERTIFICATE: return(-1);
|
|
case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
|
|
case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
|
|
case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
|
|
case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
|
|
case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
|
|
case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
|
|
case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
|
|
case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
|
|
case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
|
|
case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
|
|
case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
|
|
case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
|
|
case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
|
|
case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
|
|
case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
|
|
case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
|
|
default: return(-1);
|
|
}
|
|
}
|
|
|