* 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]={
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;
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.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;
}
}
projects / oweals / openssl.git / blobdiff