190 lines
5.9 KiB
C
190 lines
5.9 KiB
C
/* ede_cbcm_enc.c */
|
|
/*
|
|
* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL project 13 Feb
|
|
* 1999.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1999 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
|
|
* licensing@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).
|
|
*
|
|
*/
|
|
|
|
/*
|
|
*
|
|
* This is an implementation of Triple DES Cipher Block Chaining with Output
|
|
* Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).
|
|
*
|
|
* Note that there is a known attack on this by Biham and Knudsen but it
|
|
* takes a lot of work:
|
|
*
|
|
* http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz
|
|
*
|
|
*/
|
|
|
|
#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */
|
|
|
|
#ifndef OPENSSL_NO_DESCBCM
|
|
# include "des_locl.h"
|
|
|
|
void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
|
|
long length, DES_key_schedule *ks1,
|
|
DES_key_schedule *ks2, DES_key_schedule *ks3,
|
|
DES_cblock *ivec1, DES_cblock *ivec2, int enc)
|
|
{
|
|
register DES_LONG tin0, tin1;
|
|
register DES_LONG tout0, tout1, xor0, xor1, m0, m1;
|
|
register long l = length;
|
|
DES_LONG tin[2];
|
|
unsigned char *iv1, *iv2;
|
|
|
|
iv1 = &(*ivec1)[0];
|
|
iv2 = &(*ivec2)[0];
|
|
|
|
if (enc) {
|
|
c2l(iv1, m0);
|
|
c2l(iv1, m1);
|
|
c2l(iv2, tout0);
|
|
c2l(iv2, tout1);
|
|
for (l -= 8; l >= -7; l -= 8) {
|
|
tin[0] = m0;
|
|
tin[1] = m1;
|
|
DES_encrypt1(tin, ks3, 1);
|
|
m0 = tin[0];
|
|
m1 = tin[1];
|
|
|
|
if (l < 0) {
|
|
c2ln(in, tin0, tin1, l + 8);
|
|
} else {
|
|
c2l(in, tin0);
|
|
c2l(in, tin1);
|
|
}
|
|
tin0 ^= tout0;
|
|
tin1 ^= tout1;
|
|
|
|
tin[0] = tin0;
|
|
tin[1] = tin1;
|
|
DES_encrypt1(tin, ks1, 1);
|
|
tin[0] ^= m0;
|
|
tin[1] ^= m1;
|
|
DES_encrypt1(tin, ks2, 0);
|
|
tin[0] ^= m0;
|
|
tin[1] ^= m1;
|
|
DES_encrypt1(tin, ks1, 1);
|
|
tout0 = tin[0];
|
|
tout1 = tin[1];
|
|
|
|
l2c(tout0, out);
|
|
l2c(tout1, out);
|
|
}
|
|
iv1 = &(*ivec1)[0];
|
|
l2c(m0, iv1);
|
|
l2c(m1, iv1);
|
|
|
|
iv2 = &(*ivec2)[0];
|
|
l2c(tout0, iv2);
|
|
l2c(tout1, iv2);
|
|
} else {
|
|
register DES_LONG t0, t1;
|
|
|
|
c2l(iv1, m0);
|
|
c2l(iv1, m1);
|
|
c2l(iv2, xor0);
|
|
c2l(iv2, xor1);
|
|
for (l -= 8; l >= -7; l -= 8) {
|
|
tin[0] = m0;
|
|
tin[1] = m1;
|
|
DES_encrypt1(tin, ks3, 1);
|
|
m0 = tin[0];
|
|
m1 = tin[1];
|
|
|
|
c2l(in, tin0);
|
|
c2l(in, tin1);
|
|
|
|
t0 = tin0;
|
|
t1 = tin1;
|
|
|
|
tin[0] = tin0;
|
|
tin[1] = tin1;
|
|
DES_encrypt1(tin, ks1, 0);
|
|
tin[0] ^= m0;
|
|
tin[1] ^= m1;
|
|
DES_encrypt1(tin, ks2, 1);
|
|
tin[0] ^= m0;
|
|
tin[1] ^= m1;
|
|
DES_encrypt1(tin, ks1, 0);
|
|
tout0 = tin[0];
|
|
tout1 = tin[1];
|
|
|
|
tout0 ^= xor0;
|
|
tout1 ^= xor1;
|
|
if (l < 0) {
|
|
l2cn(tout0, tout1, out, l + 8);
|
|
} else {
|
|
l2c(tout0, out);
|
|
l2c(tout1, out);
|
|
}
|
|
xor0 = t0;
|
|
xor1 = t1;
|
|
}
|
|
|
|
iv1 = &(*ivec1)[0];
|
|
l2c(m0, iv1);
|
|
l2c(m1, iv1);
|
|
|
|
iv2 = &(*ivec2)[0];
|
|
l2c(xor0, iv2);
|
|
l2c(xor1, iv2);
|
|
}
|
|
tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
|
|
tin[0] = tin[1] = 0;
|
|
}
|
|
#endif
|