161828Smarkm/* crypto/idea/i_cbc.c */ 261828Smarkm/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 361828Smarkm * All rights reserved. 461828Smarkm * 561828Smarkm * This package is an SSL implementation written 661828Smarkm * by Eric Young (eay@cryptsoft.com). 761828Smarkm * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 961828Smarkm * This library is free for commercial and non-commercial use as long as 1061828Smarkm * the following conditions are aheared to. The following conditions 1161828Smarkm * apply to all code found in this distribution, be it the RC4, RSA, 1261828Smarkm * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1361828Smarkm * included with this distribution is covered by the same copyright terms 1461828Smarkm * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1661828Smarkm * Copyright remains Eric Young's, and as such any Copyright notices in 1761828Smarkm * the code are not to be removed. 1861828Smarkm * If this package is used in a product, Eric Young should be given attribution 1961828Smarkm * as the author of the parts of the library used. 2061828Smarkm * This can be in the form of a textual message at program startup or 2161828Smarkm * in documentation (online or textual) provided with the package. 22280297Sjkim * 2361828Smarkm * Redistribution and use in source and binary forms, with or without 2461828Smarkm * modification, are permitted provided that the following conditions 2561828Smarkm * are met: 2661828Smarkm * 1. Redistributions of source code must retain the copyright 2761828Smarkm * notice, this list of conditions and the following disclaimer. 2861828Smarkm * 2. Redistributions in binary form must reproduce the above copyright 2961828Smarkm * notice, this list of conditions and the following disclaimer in the 3061828Smarkm * documentation and/or other materials provided with the distribution. 3161828Smarkm * 3. All advertising materials mentioning features or use of this software 3261828Smarkm * must display the following acknowledgement: 3361828Smarkm * "This product includes cryptographic software written by 3461828Smarkm * Eric Young (eay@cryptsoft.com)" 3561828Smarkm * The word 'cryptographic' can be left out if the rouines from the library 3661828Smarkm * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3861828Smarkm * the apps directory (application code) you must include an acknowledgement: 3961828Smarkm * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4161828Smarkm * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4261828Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4361828Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4461828Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4561828Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4661828Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4761828Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4861828Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4961828Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5068654Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5161828Smarkm * SUCH DAMAGE. 52280297Sjkim * 5361828Smarkm * The licence and distribution terms for any publically available version or 5461828Smarkm * derivative of this code cannot be changed. i.e. this code cannot simply be 5561828Smarkm * copied and put under another distribution licence 5661828Smarkm * [including the GNU Public Licence.] 5761828Smarkm */ 5861828Smarkm 5961828Smarkm#include <openssl/idea.h> 6061828Smarkm#include "idea_lcl.h" 6161828Smarkm 62280297Sjkimvoid idea_cbc_encrypt(const unsigned char *in, unsigned char *out, 63280297Sjkim long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, 64280297Sjkim int encrypt) 65280297Sjkim{ 66280297Sjkim register unsigned long tin0, tin1; 67280297Sjkim register unsigned long tout0, tout1, xor0, xor1; 68280297Sjkim register long l = length; 69280297Sjkim unsigned long tin[2]; 7061828Smarkm 71280297Sjkim if (encrypt) { 72280297Sjkim n2l(iv, tout0); 73280297Sjkim n2l(iv, tout1); 74280297Sjkim iv -= 8; 75280297Sjkim for (l -= 8; l >= 0; l -= 8) { 76280297Sjkim n2l(in, tin0); 77280297Sjkim n2l(in, tin1); 78280297Sjkim tin0 ^= tout0; 79280297Sjkim tin1 ^= tout1; 80280297Sjkim tin[0] = tin0; 81280297Sjkim tin[1] = tin1; 82280297Sjkim idea_encrypt(tin, ks); 83280297Sjkim tout0 = tin[0]; 84280297Sjkim l2n(tout0, out); 85280297Sjkim tout1 = tin[1]; 86280297Sjkim l2n(tout1, out); 87280297Sjkim } 88280297Sjkim if (l != -8) { 89280297Sjkim n2ln(in, tin0, tin1, l + 8); 90280297Sjkim tin0 ^= tout0; 91280297Sjkim tin1 ^= tout1; 92280297Sjkim tin[0] = tin0; 93280297Sjkim tin[1] = tin1; 94280297Sjkim idea_encrypt(tin, ks); 95280297Sjkim tout0 = tin[0]; 96280297Sjkim l2n(tout0, out); 97280297Sjkim tout1 = tin[1]; 98280297Sjkim l2n(tout1, out); 99280297Sjkim } 100280297Sjkim l2n(tout0, iv); 101280297Sjkim l2n(tout1, iv); 102280297Sjkim } else { 103280297Sjkim n2l(iv, xor0); 104280297Sjkim n2l(iv, xor1); 105280297Sjkim iv -= 8; 106280297Sjkim for (l -= 8; l >= 0; l -= 8) { 107280297Sjkim n2l(in, tin0); 108280297Sjkim tin[0] = tin0; 109280297Sjkim n2l(in, tin1); 110280297Sjkim tin[1] = tin1; 111280297Sjkim idea_encrypt(tin, ks); 112280297Sjkim tout0 = tin[0] ^ xor0; 113280297Sjkim tout1 = tin[1] ^ xor1; 114280297Sjkim l2n(tout0, out); 115280297Sjkim l2n(tout1, out); 116280297Sjkim xor0 = tin0; 117280297Sjkim xor1 = tin1; 118280297Sjkim } 119280297Sjkim if (l != -8) { 120280297Sjkim n2l(in, tin0); 121280297Sjkim tin[0] = tin0; 122280297Sjkim n2l(in, tin1); 123280297Sjkim tin[1] = tin1; 124280297Sjkim idea_encrypt(tin, ks); 125280297Sjkim tout0 = tin[0] ^ xor0; 126280297Sjkim tout1 = tin[1] ^ xor1; 127280297Sjkim l2nn(tout0, tout1, out, l + 8); 128280297Sjkim xor0 = tin0; 129280297Sjkim xor1 = tin1; 130280297Sjkim } 131280297Sjkim l2n(xor0, iv); 132280297Sjkim l2n(xor1, iv); 133280297Sjkim } 134280297Sjkim tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 135280297Sjkim tin[0] = tin[1] = 0; 136280297Sjkim} 13761828Smarkm 13861828Smarkmvoid idea_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key) 139280297Sjkim{ 140280297Sjkim register IDEA_INT *p; 141280297Sjkim register unsigned long x1, x2, x3, x4, t0, t1, ul; 14261828Smarkm 143280297Sjkim x2 = d[0]; 144280297Sjkim x1 = (x2 >> 16); 145280297Sjkim x4 = d[1]; 146280297Sjkim x3 = (x4 >> 16); 14761828Smarkm 148280297Sjkim p = &(key->data[0][0]); 14961828Smarkm 150280297Sjkim E_IDEA(0); 151280297Sjkim E_IDEA(1); 152280297Sjkim E_IDEA(2); 153280297Sjkim E_IDEA(3); 154280297Sjkim E_IDEA(4); 155280297Sjkim E_IDEA(5); 156280297Sjkim E_IDEA(6); 157280297Sjkim E_IDEA(7); 15861828Smarkm 159280297Sjkim x1 &= 0xffff; 160280297Sjkim idea_mul(x1, x1, *p, ul); 161280297Sjkim p++; 16261828Smarkm 163280297Sjkim t0 = x3 + *(p++); 164280297Sjkim t1 = x2 + *(p++); 16561828Smarkm 166280297Sjkim x4 &= 0xffff; 167280297Sjkim idea_mul(x4, x4, *p, ul); 16861828Smarkm 169280297Sjkim d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16); 170280297Sjkim d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16); 171280297Sjkim} 172