155714Skris/* crypto/des/cbc_cksm.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280297Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280297Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include "des_locl.h" 6055714Skris 61109998SmarkmDES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, 62280297Sjkim long length, DES_key_schedule *schedule, 63280297Sjkim const_DES_cblock *ivec) 64280297Sjkim{ 65280297Sjkim register DES_LONG tout0, tout1, tin0, tin1; 66280297Sjkim register long l = length; 67280297Sjkim DES_LONG tin[2]; 68280297Sjkim unsigned char *out = &(*output)[0]; 69280297Sjkim const unsigned char *iv = &(*ivec)[0]; 7055714Skris 71280297Sjkim c2l(iv, tout0); 72280297Sjkim c2l(iv, tout1); 73280297Sjkim for (; l > 0; l -= 8) { 74280297Sjkim if (l >= 8) { 75280297Sjkim c2l(in, tin0); 76280297Sjkim c2l(in, tin1); 77280297Sjkim } else 78280297Sjkim c2ln(in, tin0, tin1, l); 79280297Sjkim 80280297Sjkim tin0 ^= tout0; 81280297Sjkim tin[0] = tin0; 82280297Sjkim tin1 ^= tout1; 83280297Sjkim tin[1] = tin1; 84280297Sjkim DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); 85280297Sjkim /* fix 15/10/91 eay - thanks to keithr@sco.COM */ 86280297Sjkim tout0 = tin[0]; 87280297Sjkim tout1 = tin[1]; 88280297Sjkim } 89280297Sjkim if (out != NULL) { 90280297Sjkim l2c(tout0, out); 91280297Sjkim l2c(tout1, out); 92280297Sjkim } 93280297Sjkim tout0 = tin0 = tin1 = tin[0] = tin[1] = 0; 94280297Sjkim /* 95280297Sjkim * Transform the data in tout1 so that it will match the return value 96280297Sjkim * that the MIT Kerberos mit_des_cbc_cksum API returns. 97280297Sjkim */ 98280297Sjkim tout1 = ((tout1 >> 24L) & 0x000000FF) 99280297Sjkim | ((tout1 >> 8L) & 0x0000FF00) 100280297Sjkim | ((tout1 << 8L) & 0x00FF0000) 101280297Sjkim | ((tout1 << 24L) & 0xFF000000); 102280297Sjkim return (tout1); 103280297Sjkim} 104