155714Skris/* crypto/des/cbc3_enc.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. 8296465Sdelphij * 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). 15296465Sdelphij * 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. 22296465Sdelphij * 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 :-). 37296465Sdelphij * 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)" 40296465Sdelphij * 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. 52296465Sdelphij * 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 6159191Skris/* HAS BUGS! DON'T USE - this is only present for use in des.c */ 62109998Smarkmvoid DES_3cbc_encrypt(DES_cblock *input, DES_cblock *output, long length, 63296465Sdelphij DES_key_schedule ks1, DES_key_schedule ks2, 64296465Sdelphij DES_cblock *iv1, DES_cblock *iv2, int enc) 65296465Sdelphij{ 66296465Sdelphij int off = ((int)length - 1) / 8; 67296465Sdelphij long l8 = ((length + 7) / 8) * 8; 68296465Sdelphij DES_cblock niv1, niv2; 6955714Skris 70296465Sdelphij if (enc == DES_ENCRYPT) { 71296465Sdelphij DES_cbc_encrypt((unsigned char *)input, 72296465Sdelphij (unsigned char *)output, length, &ks1, iv1, enc); 73296465Sdelphij if (length >= sizeof(DES_cblock)) 74296465Sdelphij memcpy(niv1, output[off], sizeof(DES_cblock)); 75296465Sdelphij DES_cbc_encrypt((unsigned char *)output, 76296465Sdelphij (unsigned char *)output, l8, &ks2, iv1, !enc); 77296465Sdelphij DES_cbc_encrypt((unsigned char *)output, 78296465Sdelphij (unsigned char *)output, l8, &ks1, iv2, enc); 79296465Sdelphij if (length >= sizeof(DES_cblock)) 80296465Sdelphij memcpy(niv2, output[off], sizeof(DES_cblock)); 81296465Sdelphij } else { 82296465Sdelphij if (length >= sizeof(DES_cblock)) 83296465Sdelphij memcpy(niv2, input[off], sizeof(DES_cblock)); 84296465Sdelphij DES_cbc_encrypt((unsigned char *)input, 85296465Sdelphij (unsigned char *)output, l8, &ks1, iv2, enc); 86296465Sdelphij DES_cbc_encrypt((unsigned char *)output, 87296465Sdelphij (unsigned char *)output, l8, &ks2, iv1, !enc); 88296465Sdelphij if (length >= sizeof(DES_cblock)) 89296465Sdelphij memcpy(niv1, output[off], sizeof(DES_cblock)); 90296465Sdelphij DES_cbc_encrypt((unsigned char *)output, 91296465Sdelphij (unsigned char *)output, length, &ks1, iv1, enc); 92296465Sdelphij } 93296465Sdelphij memcpy(*iv1, niv1, sizeof(DES_cblock)); 94296465Sdelphij memcpy(*iv2, niv2, sizeof(DES_cblock)); 95296465Sdelphij} 96