155714Skris/* ede_cbcm_enc.c */ 255714Skris/* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL 355714Skris * project 13 Feb 1999. 455714Skris */ 555714Skris/* ==================================================================== 655714Skris * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 755714Skris * 855714Skris * Redistribution and use in source and binary forms, with or without 955714Skris * modification, are permitted provided that the following conditions 1055714Skris * are met: 1155714Skris * 1255714Skris * 1. Redistributions of source code must retain the above copyright 1355714Skris * notice, this list of conditions and the following disclaimer. 1455714Skris * 1555714Skris * 2. Redistributions in binary form must reproduce the above copyright 1655714Skris * notice, this list of conditions and the following disclaimer in 1755714Skris * the documentation and/or other materials provided with the 1855714Skris * distribution. 1955714Skris * 2055714Skris * 3. All advertising materials mentioning features or use of this 2155714Skris * software must display the following acknowledgment: 2255714Skris * "This product includes software developed by the OpenSSL Project 2355714Skris * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 2455714Skris * 2555714Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2655714Skris * endorse or promote products derived from this software without 2755714Skris * prior written permission. For written permission, please contact 2855714Skris * licensing@OpenSSL.org. 2955714Skris * 3055714Skris * 5. Products derived from this software may not be called "OpenSSL" 3155714Skris * nor may "OpenSSL" appear in their names without prior written 3255714Skris * permission of the OpenSSL Project. 3355714Skris * 3455714Skris * 6. Redistributions of any form whatsoever must retain the following 3555714Skris * acknowledgment: 3655714Skris * "This product includes software developed by the OpenSSL Project 3755714Skris * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 3855714Skris * 3955714Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4055714Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4155714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4255714Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4355714Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4455714Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4555714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4655714Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4755714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4855714Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4955714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5055714Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 5155714Skris * ==================================================================== 5255714Skris * 5355714Skris * This product includes cryptographic software written by Eric Young 5455714Skris * (eay@cryptsoft.com). This product includes software written by Tim 5555714Skris * Hudson (tjh@cryptsoft.com). 5655714Skris * 5755714Skris */ 5855714Skris 5955714Skris/* 6055714Skris 6155714SkrisThis is an implementation of Triple DES Cipher Block Chaining with Output 6255714SkrisFeedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom). 6355714Skris 6455714SkrisNote that there is a known attack on this by Biham and Knudsen but it takes 6555714Skrisa lot of work: 6655714Skris 6755714Skrishttp://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz 6855714Skris 6955714Skris*/ 7055714Skris 71160814Ssimon#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */ 72160814Ssimon 73109998Smarkm#ifndef OPENSSL_NO_DESCBCM 7455714Skris#include "des_locl.h" 7555714Skris 76109998Smarkmvoid DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out, 77109998Smarkm long length, DES_key_schedule *ks1, DES_key_schedule *ks2, 78109998Smarkm DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2, 7955714Skris int enc) 8055714Skris { 8155714Skris register DES_LONG tin0,tin1; 8255714Skris register DES_LONG tout0,tout1,xor0,xor1,m0,m1; 8355714Skris register long l=length; 8455714Skris DES_LONG tin[2]; 8555714Skris unsigned char *iv1,*iv2; 8655714Skris 8755714Skris iv1 = &(*ivec1)[0]; 8855714Skris iv2 = &(*ivec2)[0]; 8955714Skris 9055714Skris if (enc) 9155714Skris { 9255714Skris c2l(iv1,m0); 9355714Skris c2l(iv1,m1); 9455714Skris c2l(iv2,tout0); 9555714Skris c2l(iv2,tout1); 9655714Skris for (l-=8; l>=-7; l-=8) 9755714Skris { 9855714Skris tin[0]=m0; 9955714Skris tin[1]=m1; 100109998Smarkm DES_encrypt1(tin,ks3,1); 10155714Skris m0=tin[0]; 10255714Skris m1=tin[1]; 10355714Skris 10455714Skris if(l < 0) 10555714Skris { 10655714Skris c2ln(in,tin0,tin1,l+8); 10755714Skris } 10855714Skris else 10955714Skris { 11055714Skris c2l(in,tin0); 11155714Skris c2l(in,tin1); 11255714Skris } 11355714Skris tin0^=tout0; 11455714Skris tin1^=tout1; 11555714Skris 11655714Skris tin[0]=tin0; 11755714Skris tin[1]=tin1; 118109998Smarkm DES_encrypt1(tin,ks1,1); 11955714Skris tin[0]^=m0; 12055714Skris tin[1]^=m1; 121109998Smarkm DES_encrypt1(tin,ks2,0); 12255714Skris tin[0]^=m0; 12355714Skris tin[1]^=m1; 124109998Smarkm DES_encrypt1(tin,ks1,1); 12555714Skris tout0=tin[0]; 12655714Skris tout1=tin[1]; 12755714Skris 12855714Skris l2c(tout0,out); 12955714Skris l2c(tout1,out); 13055714Skris } 13155714Skris iv1=&(*ivec1)[0]; 13255714Skris l2c(m0,iv1); 13355714Skris l2c(m1,iv1); 13455714Skris 13555714Skris iv2=&(*ivec2)[0]; 13655714Skris l2c(tout0,iv2); 13755714Skris l2c(tout1,iv2); 13855714Skris } 13955714Skris else 14055714Skris { 14155714Skris register DES_LONG t0,t1; 14255714Skris 14355714Skris c2l(iv1,m0); 14455714Skris c2l(iv1,m1); 14555714Skris c2l(iv2,xor0); 14655714Skris c2l(iv2,xor1); 14755714Skris for (l-=8; l>=-7; l-=8) 14855714Skris { 14955714Skris tin[0]=m0; 15055714Skris tin[1]=m1; 151109998Smarkm DES_encrypt1(tin,ks3,1); 15255714Skris m0=tin[0]; 15355714Skris m1=tin[1]; 15455714Skris 15555714Skris c2l(in,tin0); 15655714Skris c2l(in,tin1); 15755714Skris 15855714Skris t0=tin0; 15955714Skris t1=tin1; 16055714Skris 16155714Skris tin[0]=tin0; 16255714Skris tin[1]=tin1; 163109998Smarkm DES_encrypt1(tin,ks1,0); 16455714Skris tin[0]^=m0; 16555714Skris tin[1]^=m1; 166109998Smarkm DES_encrypt1(tin,ks2,1); 16755714Skris tin[0]^=m0; 16855714Skris tin[1]^=m1; 169109998Smarkm DES_encrypt1(tin,ks1,0); 17055714Skris tout0=tin[0]; 17155714Skris tout1=tin[1]; 17255714Skris 17355714Skris tout0^=xor0; 17455714Skris tout1^=xor1; 17555714Skris if(l < 0) 17655714Skris { 17755714Skris l2cn(tout0,tout1,out,l+8); 17855714Skris } 17955714Skris else 18055714Skris { 18155714Skris l2c(tout0,out); 18255714Skris l2c(tout1,out); 18355714Skris } 18455714Skris xor0=t0; 18555714Skris xor1=t1; 18655714Skris } 18755714Skris 18855714Skris iv1=&(*ivec1)[0]; 18955714Skris l2c(m0,iv1); 19055714Skris l2c(m1,iv1); 19155714Skris 19255714Skris iv2=&(*ivec2)[0]; 19355714Skris l2c(xor0,iv2); 19455714Skris l2c(xor1,iv2); 19555714Skris } 19655714Skris tin0=tin1=tout0=tout1=xor0=xor1=0; 19755714Skris tin[0]=tin[1]=0; 19855714Skris } 19955714Skris#endif 200