* 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 <openssl/evp.h>
#include "ssl_locl.h"
+#include <openssl/evp.h>
#include <openssl/md5.h>
static unsigned char ssl3_pad_1[48]={
EVP_MD_CTX s1;
unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
unsigned char c='A';
- int i,j,k;
+ unsigned int i,j,k;
#ifdef CHARSET_EBCDIC
c = os_toascii[c]; /*'A' in ASCII */
k=0;
EVP_MD_CTX_init(&m5);
EVP_MD_CTX_init(&s1);
- for (i=0; i<num; i+=MD5_DIGEST_LENGTH)
+ for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
{
k++;
if (k > sizeof buf)
EVP_DigestUpdate(&m5,s->session->master_key,
s->session->master_key_length);
EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
- if ((i+MD5_DIGEST_LENGTH) > num)
+ if ((int)(i+MD5_DIGEST_LENGTH) > num)
{
EVP_DigestFinal_ex(&m5,smd,NULL);
memcpy(km,smd,(num-i));
km+=MD5_DIGEST_LENGTH;
}
- memset(smd,0,SHA_DIGEST_LENGTH);
+ OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
EVP_MD_CTX_cleanup(&m5);
EVP_MD_CTX_cleanup(&s1);
return 1;
{
unsigned char *p,*key_block,*mac_secret;
unsigned char exp_key[EVP_MAX_KEY_LENGTH];
- unsigned char exp_iv[EVP_MAX_KEY_LENGTH];
+ unsigned char exp_iv[EVP_MAX_IV_LENGTH];
unsigned char *ms,*key,*iv,*er1,*er2;
EVP_CIPHER_CTX *dd;
const EVP_CIPHER *c;
+#ifndef OPENSSL_NO_COMP
COMP_METHOD *comp;
+#endif
const EVP_MD *m;
EVP_MD_CTX md;
- int exp,n,i,j,k,cl;
+ int is_exp,n,i,j,k,cl;
+ int reuse_dd = 0;
- exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
+ is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
c=s->s3->tmp.new_sym_enc;
m=s->s3->tmp.new_hash;
+#ifndef OPENSSL_NO_COMP
if (s->s3->tmp.new_compression == NULL)
comp=NULL;
else
comp=s->s3->tmp.new_compression->method;
+#endif
key_block=s->s3->tmp.key_block;
if (which & SSL3_CC_READ)
{
- if ((s->enc_read_ctx == NULL) &&
- ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
- OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
+ 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;
+#ifndef OPENSSL_NO_COMP
/* COMPRESS */
if (s->expand != NULL)
{
if (s->s3->rrec.comp == NULL)
goto err;
}
+#endif
memset(&(s->s3->read_sequence[0]),0,8);
mac_secret= &(s->s3->read_mac_secret[0]);
}
else
{
- if ((s->enc_write_ctx == NULL) &&
- ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
- OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
+ if (s->enc_write_ctx != NULL)
+ reuse_dd = 1;
+ else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
goto err;
dd= s->enc_write_ctx;
s->write_hash=m;
+#ifndef OPENSSL_NO_COMP
/* COMPRESS */
if (s->compress != NULL)
{
goto err2;
}
}
+#endif
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=exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
+ j=is_exp ? (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); */
+ /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
k=EVP_CIPHER_iv_length(c);
if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
(which == SSL3_CHANGE_CIPHER_SERVER_READ))
EVP_MD_CTX_init(&md);
memcpy(mac_secret,ms,i);
- if (exp)
+ if (is_exp)
{
/* In here I set both the read and write key/iv to the
* same value since only the correct one will be used :-).
EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
- memset(&(exp_key[0]),0,sizeof(exp_key));
- memset(&(exp_iv[0]),0,sizeof(exp_iv));
+ OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
+ OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
EVP_MD_CTX_cleanup(&md);
return(1);
err:
const EVP_CIPHER *c;
const EVP_MD *hash;
int num;
+ int ret = 0;
SSL_COMP *comp;
if (s->s3->tmp.key_block_length != 0)
s->s3->tmp.new_sym_enc=c;
s->s3->tmp.new_hash=hash;
+#ifdef OPENSSL_NO_COMP
+ s->s3->tmp.new_compression=NULL;
+#else
s->s3->tmp.new_compression=comp;
+#endif
num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
num*=2;
s->s3->tmp.key_block_length=num;
s->s3->tmp.key_block=p;
- return ssl3_generate_key_block(s,p,num);
+ ret = ssl3_generate_key_block(s,p,num);
+
+ 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 ret;
+
err:
SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
return(0);
{
if (s->s3->tmp.key_block != NULL)
{
- memset(s->s3->tmp.key_block,0,
+ OPENSSL_cleanse(s->s3->tmp.key_block,
s->s3->tmp.key_block_length);
OPENSSL_free(s->s3->tmp.key_block);
s->s3->tmp.key_block=NULL;
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
return 0;
}
+ /* otherwise, rec->length >= bs */
}
EVP_Cipher(ds,rec->data,rec->input,l);
{
i=rec->data[l-1]+1;
/* SSL 3.0 bounds the number of padding bytes by the block size;
- * padding bytes (except that last) are arbitrary */
+ * padding bytes (except the last one) are arbitrary */
if (i > bs)
{
/* Incorrect padding. SSLerr() and ssl3_alert are done
* (see http://www.openssl.org/~bodo/tls-cbc.txt) */
return -1;
}
+ /* now i <= bs <= rec->length */
rec->length-=i;
}
}
const EVP_MD *hash;
unsigned char *p,rec_char;
unsigned int md_size;
- int npad,i;
+ int npad;
if (send)
{
EVP_MD_CTX_cleanup(&md_ctx);
+ ssl3_record_sequence_update(seq);
+ return(md_size);
+ }
+
+void ssl3_record_sequence_update(unsigned char *seq)
+ {
+ int i;
+
for (i=7; i>=0; i--)
{
++seq[i];
if (seq[i] != 0) break;
}
-
- return(md_size);
}
int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
projects / openssl.git / blobdiff