2002-01-02 16:55:35 +00:00
|
|
|
/* crypto/aes/aes_cbc.c -*- mode:C; c-file-style: "eay" -*- */
|
|
|
|
/* ====================================================================
|
2002-02-16 12:20:34 +00:00
|
|
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
|
2002-01-02 16:55:35 +00:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
* ====================================================================
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2002-11-13 14:01:34 +00:00
|
|
|
#ifndef AES_DEBUG
|
|
|
|
# ifndef NDEBUG
|
|
|
|
# define NDEBUG
|
|
|
|
# endif
|
|
|
|
#endif
|
2002-01-02 16:55:35 +00:00
|
|
|
#include <assert.h>
|
2002-11-13 14:01:34 +00:00
|
|
|
|
2002-01-02 16:55:35 +00:00
|
|
|
#include <openssl/aes.h>
|
|
|
|
#include "aes_locl.h"
|
|
|
|
|
2008-09-16 10:47:28 +00:00
|
|
|
#if !defined(OPENSSL_FIPS_AES_ASM)
|
2002-01-02 16:55:35 +00:00
|
|
|
void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
|
|
|
|
const unsigned long length, const AES_KEY *key,
|
|
|
|
unsigned char *ivec, const int enc) {
|
|
|
|
|
2002-11-14 15:57:38 +00:00
|
|
|
unsigned long n;
|
2002-01-02 16:55:35 +00:00
|
|
|
unsigned long len = length;
|
2004-12-28 10:35:13 +00:00
|
|
|
unsigned char tmp[AES_BLOCK_SIZE];
|
|
|
|
const unsigned char *iv = ivec;
|
2002-01-02 16:55:35 +00:00
|
|
|
|
|
|
|
assert(in && out && key && ivec);
|
|
|
|
assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
|
|
|
|
|
2002-11-12 11:00:25 +00:00
|
|
|
if (AES_ENCRYPT == enc) {
|
|
|
|
while (len >= AES_BLOCK_SIZE) {
|
2002-11-13 15:43:43 +00:00
|
|
|
for(n=0; n < AES_BLOCK_SIZE; ++n)
|
2004-12-26 12:31:37 +00:00
|
|
|
out[n] = in[n] ^ iv[n];
|
|
|
|
AES_encrypt(out, out, key);
|
|
|
|
iv = out;
|
2002-11-13 15:43:43 +00:00
|
|
|
len -= AES_BLOCK_SIZE;
|
|
|
|
in += AES_BLOCK_SIZE;
|
|
|
|
out += AES_BLOCK_SIZE;
|
2002-01-02 16:55:35 +00:00
|
|
|
}
|
2002-11-12 11:00:25 +00:00
|
|
|
if (len) {
|
|
|
|
for(n=0; n < len; ++n)
|
2004-12-26 13:05:40 +00:00
|
|
|
out[n] = in[n] ^ iv[n];
|
2002-11-12 11:00:25 +00:00
|
|
|
for(n=len; n < AES_BLOCK_SIZE; ++n)
|
2004-12-26 13:05:40 +00:00
|
|
|
out[n] = iv[n];
|
|
|
|
AES_encrypt(out, out, key);
|
2004-12-26 12:31:37 +00:00
|
|
|
iv = out;
|
2004-12-28 10:35:13 +00:00
|
|
|
}
|
2004-12-26 12:31:37 +00:00
|
|
|
memcpy(ivec,iv,AES_BLOCK_SIZE);
|
|
|
|
} else if (in != out) {
|
|
|
|
while (len >= AES_BLOCK_SIZE) {
|
|
|
|
AES_decrypt(in, out, key);
|
|
|
|
for(n=0; n < AES_BLOCK_SIZE; ++n)
|
|
|
|
out[n] ^= iv[n];
|
|
|
|
iv = in;
|
|
|
|
len -= AES_BLOCK_SIZE;
|
|
|
|
in += AES_BLOCK_SIZE;
|
|
|
|
out += AES_BLOCK_SIZE;
|
|
|
|
}
|
|
|
|
if (len) {
|
|
|
|
AES_decrypt(in,tmp,key);
|
|
|
|
for(n=0; n < len; ++n)
|
|
|
|
out[n] = tmp[n] ^ iv[n];
|
|
|
|
iv = in;
|
|
|
|
}
|
|
|
|
memcpy(ivec,iv,AES_BLOCK_SIZE);
|
2002-11-12 11:00:25 +00:00
|
|
|
} else {
|
|
|
|
while (len >= AES_BLOCK_SIZE) {
|
2003-10-29 06:21:22 +00:00
|
|
|
memcpy(tmp, in, AES_BLOCK_SIZE);
|
2002-01-02 16:55:35 +00:00
|
|
|
AES_decrypt(in, out, key);
|
2002-11-13 15:43:43 +00:00
|
|
|
for(n=0; n < AES_BLOCK_SIZE; ++n)
|
2002-01-02 16:55:35 +00:00
|
|
|
out[n] ^= ivec[n];
|
2003-10-29 06:21:22 +00:00
|
|
|
memcpy(ivec, tmp, AES_BLOCK_SIZE);
|
2002-11-13 15:43:43 +00:00
|
|
|
len -= AES_BLOCK_SIZE;
|
|
|
|
in += AES_BLOCK_SIZE;
|
|
|
|
out += AES_BLOCK_SIZE;
|
2002-01-02 16:55:35 +00:00
|
|
|
}
|
2002-11-12 11:00:25 +00:00
|
|
|
if (len) {
|
2002-11-13 15:43:43 +00:00
|
|
|
memcpy(tmp, in, AES_BLOCK_SIZE);
|
2005-01-18 00:26:52 +00:00
|
|
|
AES_decrypt(tmp, out, key);
|
2002-11-12 11:00:25 +00:00
|
|
|
for(n=0; n < len; ++n)
|
2005-01-18 00:26:52 +00:00
|
|
|
out[n] ^= ivec[n];
|
|
|
|
for(n=len; n < AES_BLOCK_SIZE; ++n)
|
|
|
|
out[n] = tmp[n];
|
2003-10-29 06:21:22 +00:00
|
|
|
memcpy(ivec, tmp, AES_BLOCK_SIZE);
|
2004-12-28 10:35:13 +00:00
|
|
|
}
|
2002-11-12 11:00:25 +00:00
|
|
|
}
|
2002-01-02 16:55:35 +00:00
|
|
|
}
|
2008-09-16 10:47:28 +00:00
|
|
|
#endif
|