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openssl/ssl/t1_enc.c
Dr. Stephen Henson 28dd49faec Expand range of ctrls for AES GCM to support retrieval and setting of 
invocation field.

Add complete support for AES GCM ciphersuites including all those in
RFC5288 and RFC5289.
2011-08-03 15:37:22 +00:00

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/* 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) 1998-2007 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).
*
*/
/* ====================================================================
* Copyright 2005 Nokia. All rights reserved.
*
* The portions of the attached software ("Contribution") is developed by
* Nokia Corporation and is licensed pursuant to the OpenSSL open source
* license.
*
* The Contribution, originally written by Mika Kousa and Pasi Eronen of
* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
* support (see RFC 4279) to OpenSSL.
*
* No patent licenses or other rights except those expressly stated in
* the OpenSSL open source license shall be deemed granted or received
* expressly, by implication, estoppel, or otherwise.
*
* No assurances are provided by Nokia that the Contribution does not
* infringe the patent or other intellectual property rights of any third
* party or that the license provides you with all the necessary rights
* to make use of the Contribution.
*
* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
* OTHERWISE.
*/
#include <stdio.h>
#include "ssl_locl.h"
#ifndef OPENSSL_NO_COMP
#include <openssl/comp.h>
#endif
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/md5.h>
#include <openssl/rand.h>
#ifdef KSSL_DEBUG
#include <openssl/des.h>
#endif
/* seed1 through seed5 are virtually concatenated */
static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
int sec_len,
const void *seed1, int seed1_len,
const void *seed2, int seed2_len,
const void *seed3, int seed3_len,
const void *seed4, int seed4_len,
const void *seed5, int seed5_len,
unsigned char *out, int olen)
{
int chunk;
size_t j;
EVP_MD_CTX ctx, ctx_tmp;
EVP_PKEY *mac_key;
unsigned char A1[EVP_MAX_MD_SIZE];
size_t A1_len;
int ret = 0;
chunk=EVP_MD_size(md);
OPENSSL_assert(chunk >= 0);
EVP_MD_CTX_init(&ctx);
EVP_MD_CTX_init(&ctx_tmp);
EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
if (!mac_key)
goto err;
if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
goto err;
if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
goto err;
if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
goto err;
if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
goto err;
if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
goto err;
if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
goto err;
if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
goto err;
if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
goto err;
for (;;)
{
/* Reinit mac contexts */
if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
goto err;
if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
goto err;
if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
goto err;
if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
goto err;
if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
goto err;
if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
goto err;
if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
goto err;
if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
goto err;
if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
goto err;
if (olen > chunk)
{
if (!EVP_DigestSignFinal(&ctx,out,&j))
goto err;
out+=j;
olen-=j;
/* calc the next A1 value */
if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
goto err;
}
else /* last one */
{
if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
goto err;
memcpy(out,A1,olen);
break;
}
}
ret = 1;
err:
EVP_PKEY_free(mac_key);
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_cleanup(&ctx_tmp);
OPENSSL_cleanse(A1,sizeof(A1));
return ret;
}
/* seed1 through seed5 are virtually concatenated */
static int tls1_PRF(long digest_mask,
const void *seed1, int seed1_len,
const void *seed2, int seed2_len,
const void *seed3, int seed3_len,
const void *seed4, int seed4_len,
const void *seed5, int seed5_len,
const unsigned char *sec, int slen,
unsigned char *out1,
unsigned char *out2, int olen)
{
int len,i,idx,count;
const unsigned char *S1;
long m;
const EVP_MD *md;
int ret = 0;
/* Count number of digests and partition sec evenly */
count=0;
for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
}
len=slen/count;
if (count == 1)
slen = 0;
S1=sec;
memset(out1,0,olen);
for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
if (!md) {
SSLerr(SSL_F_TLS1_PRF,
SSL_R_UNSUPPORTED_DIGEST_TYPE);
goto err;
}
if (!tls1_P_hash(md ,S1,len+(slen&1),
seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
out2,olen))
goto err;
S1+=len;
for (i=0; i<olen; i++)
{
out1[i]^=out2[i];
}
}
}
ret = 1;
err:
return ret;
}
static int tls1_generate_key_block(SSL *s, unsigned char *km,
unsigned char *tmp, int num)
{
int ret;
ret = tls1_PRF(ssl_get_algorithm2(s),
TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
s->s3->server_random,SSL3_RANDOM_SIZE,
s->s3->client_random,SSL3_RANDOM_SIZE,
NULL,0,NULL,0,
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 */
return ret;
}
int tls1_change_cipher_state(SSL *s, int which)
{
static const unsigned char empty[]="";
unsigned char *p,*mac_secret;
unsigned char *exp_label;
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;
int client_write;
EVP_CIPHER_CTX *dd;
const EVP_CIPHER *c;
#ifndef OPENSSL_NO_COMP
const SSL_COMP *comp;
#endif
const EVP_MD *m;
int mac_type;
int *mac_secret_size;
EVP_MD_CTX *mac_ctx;
EVP_PKEY *mac_key;
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;
mac_type = s->s3->tmp.new_mac_pkey_type;
#ifndef OPENSSL_NO_COMP
comp=s->s3->tmp.new_compression;
#endif
#ifdef KSSL_DEBUG
printf("tls1_change_cipher_state(which= %d) w/\n", which);
printf("\talg= %ld/%ld, comp= %p\n",
s->s3->tmp.new_cipher->algorithm_mkey,
s->s3->tmp.new_cipher->algorithm_auth,
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->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
else
s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
if (s->enc_read_ctx != NULL)
reuse_dd = 1;
else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
goto err;
else
/* make sure it's intialized in case we exit later with an error */
EVP_CIPHER_CTX_init(s->enc_read_ctx);
dd= s->enc_read_ctx;
mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
#ifndef OPENSSL_NO_COMP
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;
}
#endif
/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
if (s->version != DTLS1_VERSION)
memset(&(s->s3->read_sequence[0]),0,8);
mac_secret= &(s->s3->read_mac_secret[0]);
mac_secret_size=&(s->s3->read_mac_secret_size);
}
else
{
if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
else
s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
if (s->enc_write_ctx != NULL)
reuse_dd = 1;
else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
goto err;
else
/* make sure it's intialized in case we exit later with an error */
EVP_CIPHER_CTX_init(s->enc_write_ctx);
dd= s->enc_write_ctx;
mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
#ifndef OPENSSL_NO_COMP
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;
}
}
#endif
/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
if (s->version != DTLS1_VERSION)
memset(&(s->s3->write_sequence[0]),0,8);
mac_secret= &(s->s3->write_mac_secret[0]);
mac_secret_size = &(s->s3->write_mac_secret_size);
}
if (reuse_dd)
EVP_CIPHER_CTX_cleanup(dd);
p=s->s3->tmp.key_block;
i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
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); */
/* If GCM mode only part of IV comes from PRF */
if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
k = EVP_GCM_TLS_FIXED_IV_LEN;
else
k=EVP_CIPHER_iv_length(c);
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);
if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
{
mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
mac_secret,*mac_secret_size);
EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
EVP_PKEY_free(mac_key);
}
#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 :-).
*/
if (!tls1_PRF(ssl_get_algorithm2(s),
exp_label,exp_label_len,
s->s3->client_random,SSL3_RANDOM_SIZE,
s->s3->server_random,SSL3_RANDOM_SIZE,
NULL,0,NULL,0,
key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
goto err2;
key=tmp1;
if (k > 0)
{
if (!tls1_PRF(ssl_get_algorithm2(s),
TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
s->s3->client_random,SSL3_RANDOM_SIZE,
s->s3->server_random,SSL3_RANDOM_SIZE,
NULL,0,NULL,0,
empty,0,iv1,iv2,k*2))
goto err2;
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 */
if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
{
EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
}
else
EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
*mac_secret_size,mac_secret);
#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=NULL;
const EVP_CIPHER *c;
const EVP_MD *hash;
int num;
SSL_COMP *comp;
int mac_type= NID_undef,mac_secret_size=0;
int ret=0;
#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,&mac_type,&mac_secret_size,&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;
s->s3->tmp.new_mac_pkey_type = mac_type;
s->s3->tmp.new_mac_secret_size = mac_secret_size;
num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
num*=2;
ssl3_cleanup_key_block(s);
if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
{
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
goto err;
}
s->s3->tmp.key_block_length=num;
s->s3->tmp.key_block=p1;
if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
{
SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
goto err;
}
#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
if (!tls1_generate_key_block(s,p1,p2,num))
goto err;
#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)
&& s->method->version <= TLS1_VERSION)
{
/* 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->algorithm_enc == SSL_eNULL)
s->s3->need_empty_fragments = 0;
#ifndef OPENSSL_NO_RC4
if (s->session->cipher->algorithm_enc == SSL_RC4)
s->s3->need_empty_fragments = 0;
#endif
}
}
ret = 1;
err:
if (p2)
{
OPENSSL_cleanse(p2,num);
OPENSSL_free(p2);
}
return(ret);
}
int tls1_enc(SSL *s, int send)
{
SSL3_RECORD *rec;
EVP_CIPHER_CTX *ds;
unsigned long l;
int bs,i,ii,j,k,pad=0;
const EVP_CIPHER *enc;
if (send)
{
if (EVP_MD_CTX_md(s->write_hash))
{
int n=EVP_MD_CTX_size(s->write_hash);
OPENSSL_assert(n >= 0);
}
ds=s->enc_write_ctx;
rec= &(s->s3->wrec);
if (s->enc_write_ctx == NULL)
enc=NULL;
else
{
int ivlen;
enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
/* For TLSv1.1 and later explicit IV */
if (s->version >= TLS1_1_VERSION
&& EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
ivlen = EVP_CIPHER_iv_length(enc);
else
ivlen = 0;
if (ivlen > 1)
{
if ( rec->data != rec->input)
/* we can't write into the input stream:
* Can this ever happen?? (steve)
*/
fprintf(stderr,
"%s:%d: rec->data != rec->input\n",
__FILE__, __LINE__);
else if (RAND_bytes(rec->input, ivlen) <= 0)
return -1;
}
}
}
else
{
if (EVP_MD_CTX_md(s->read_hash))
{
int n=EVP_MD_CTX_size(s->read_hash);
OPENSSL_assert(n >= 0);
}
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 (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
{
unsigned char buf[13],*seq;
seq = send?s->s3->write_sequence:s->s3->read_sequence;
if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
{
unsigned char dtlsseq[9],*p=dtlsseq;
s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
memcpy(p,&seq[2],6);
memcpy(buf,dtlsseq,8);
}
else
{
memcpy(buf,seq,8);
for (i=7; i>=0; i--) /* increment */
{
++seq[i];
if (seq[i] != 0) break;
}
}
buf[8]=rec->type;
buf[9]=(unsigned char)(s->version>>8);
buf[10]=(unsigned char)(s->version);
buf[11]=rec->length>>8;
buf[12]=rec->length&0xff;
pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
if (send)
{
l+=pad;
rec->length+=pad;
}
}
else 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)
{
if (s->version >= TLS1_1_VERSION)
return -1;
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;
}
}
if (EVP_Cipher(ds,rec->data,rec->input,l) < 0)
return -1; /* AEAD can fail to verify MAC */
if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
{
rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
}
#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++;
/* NB: if compression is in operation the first packet
* may not be of even length so the padding bug check
* cannot be performed. This bug workaround has been
* around since SSLeay so hopefully it is either fixed
* now or no buggy implementation supports compression
* [steve]
*/
if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
&& !s->expand)
{
/* 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;
if (s->version >= TLS1_1_VERSION
&& EVP_CIPHER_CTX_mode(ds) == EVP_CIPH_CBC_MODE)
{
rec->data += bs; /* skip the explicit IV */
rec->input += bs;
rec->length -= bs;
}
}
if (pad && !send)
rec->length -= pad;
}
return(1);
}
int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
{
unsigned int ret;
EVP_MD_CTX ctx, *d=NULL;
int i;
if (s->s3->handshake_buffer)
if (!ssl3_digest_cached_records(s))
return 0;
for (i=0;i<SSL_MAX_DIGEST;i++)
{
if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
{
d=s->s3->handshake_dgst[i];
break;
}
}
if (!d) {
SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
return 0;
}
EVP_MD_CTX_init(&ctx);
EVP_MD_CTX_copy_ex(&ctx,d);
EVP_DigestFinal_ex(&ctx,out,&ret);
EVP_MD_CTX_cleanup(&ctx);
return((int)ret);
}
int tls1_final_finish_mac(SSL *s,
const char *str, int slen, unsigned char *out)
{
unsigned int i;
EVP_MD_CTX ctx;
unsigned char buf[2*EVP_MAX_MD_SIZE];
unsigned char *q,buf2[12];
int idx;
long mask;
int err=0;
const EVP_MD *md;
q=buf;
if (s->s3->handshake_buffer)
if (!ssl3_digest_cached_records(s))
return 0;
EVP_MD_CTX_init(&ctx);
for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
{
if (mask & ssl_get_algorithm2(s))
{
int hashsize = EVP_MD_size(md);
if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
{
/* internal error: 'buf' is too small for this cipersuite! */
err = 1;
}
else
{
EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
EVP_DigestFinal_ex(&ctx,q,&i);
if (i != (unsigned int)hashsize) /* can't really happen */
err = 1;
q+=i;
}
}
}
if (!tls1_PRF(ssl_get_algorithm2(s),
str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
s->session->master_key,s->session->master_key_length,
out,buf2,sizeof buf2))
err = 1;
EVP_MD_CTX_cleanup(&ctx);
if (err)
return 0;
else
return sizeof buf2;
}
int tls1_mac(SSL *ssl, unsigned char *md, int send)
{
SSL3_RECORD *rec;
unsigned char *seq;
EVP_MD_CTX *hash;
size_t md_size;
int i;
EVP_MD_CTX hmac, *mac_ctx;
unsigned char buf[5];
int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
int t;
if (send)
{
rec= &(ssl->s3->wrec);
seq= &(ssl->s3->write_sequence[0]);
hash=ssl->write_hash;
}
else
{
rec= &(ssl->s3->rrec);
seq= &(ssl->s3->read_sequence[0]);
hash=ssl->read_hash;
}
t=EVP_MD_CTX_size(hash);
OPENSSL_assert(t >= 0);
md_size=t;
buf[0]=rec->type;
buf[1]=(unsigned char)(ssl->version>>8);
buf[2]=(unsigned char)(ssl->version);
buf[3]=rec->length>>8;
buf[4]=rec->length&0xff;
/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
if (stream_mac)
{
mac_ctx = hash;
}
else
{
EVP_MD_CTX_copy(&hmac,hash);
mac_ctx = &hmac;
}
if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
{
unsigned char dtlsseq[8],*p=dtlsseq;
s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
memcpy (p,&seq[2],6);
EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
}
else
EVP_DigestSignUpdate(mac_ctx,seq,8);
EVP_DigestSignUpdate(mac_ctx,buf,5);
EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
OPENSSL_assert(t > 0);
if (!stream_mac) EVP_MD_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
if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
{
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 buff[SSL_MAX_MASTER_KEY_LENGTH];
const void *co = NULL, *so = NULL;
int col = 0, sol = 0;
#ifdef KSSL_DEBUG
printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
#endif /* KSSL_DEBUG */
#ifdef TLSEXT_TYPE_opaque_prf_input
if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
s->s3->client_opaque_prf_input_len > 0 &&
s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
{
co = s->s3->client_opaque_prf_input;
col = s->s3->server_opaque_prf_input_len;
so = s->s3->server_opaque_prf_input;
sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
}
#endif
tls1_PRF(ssl_get_algorithm2(s),
TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
s->s3->client_random,SSL3_RANDOM_SIZE,
co, col,
s->s3->server_random,SSL3_RANDOM_SIZE,
so, sol,
p,len,
s->session->master_key,buff,sizeof buff);
#ifdef SSL_DEBUG
fprintf(stderr, "Premaster Secret:\n");
BIO_dump_fp(stderr, (char *)p, len);
fprintf(stderr, "Client Random:\n");
BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
fprintf(stderr, "Server Random:\n");
BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
fprintf(stderr, "Master Secret:\n");
BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
#endif
#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);
case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
#ifndef OPENSSL_NO_SRP
case SSL_AD_MISSING_SRP_USERNAME:return(TLS1_AD_MISSING_SRP_USERNAME);
#endif
#if 0 /* not appropriate for TLS, not used for DTLS */
case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
(DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
#endif
default: return(-1);
}
}
int SSL_tls1_key_exporter(SSL *s, unsigned char *label, int label_len,
unsigned char *context, int context_len,
unsigned char *out, int olen)
{
unsigned char *tmp;
int rv;
tmp = OPENSSL_malloc(olen);
if (!tmp)
return 0;
rv = tls1_PRF(ssl_get_algorithm2(s),
label, label_len,
s->s3->client_random,SSL3_RANDOM_SIZE,
s->s3->server_random,SSL3_RANDOM_SIZE,
context, context_len, NULL, 0,
s->session->master_key, s->session->master_key_length,
out, tmp, olen);
OPENSSL_free(tmp);
return rv;
}
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