You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
189 lines
5.9 KiB
189 lines
5.9 KiB
/* 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
|
|
|