155714Skris/* crypto/evp/e_xcbc_d.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. 855714Skris * 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). 1555714Skris * 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. 2255714Skris * 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 :-). 3755714Skris * 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)" 4055714Skris * 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. 5255714Skris * 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 <stdio.h> 6055714Skris#include "cryptlib.h" 61160814Ssimon 62160814Ssimon#ifndef OPENSSL_NO_DES 63160814Ssimon 6455714Skris#include <openssl/evp.h> 6555714Skris#include <openssl/objects.h> 66238405Sjkim#include "evp_locl.h" 67109998Smarkm#include <openssl/des.h> 6855714Skris 6968651Skrisstatic int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 7068651Skris const unsigned char *iv,int enc); 7168651Skrisstatic int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 72238405Sjkim const unsigned char *in, size_t inl); 73109998Smarkm 74109998Smarkm 75109998Smarkmtypedef struct 76109998Smarkm { 77109998Smarkm DES_key_schedule ks;/* key schedule */ 78109998Smarkm DES_cblock inw; 79109998Smarkm DES_cblock outw; 80109998Smarkm } DESX_CBC_KEY; 81109998Smarkm 82109998Smarkm#define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data) 83109998Smarkm 84109998Smarkmstatic const EVP_CIPHER d_xcbc_cipher= 8555714Skris { 8655714Skris NID_desx_cbc, 8755714Skris 8,24,8, 8868651Skris EVP_CIPH_CBC_MODE, 8955714Skris desx_cbc_init_key, 9055714Skris desx_cbc_cipher, 9155714Skris NULL, 92109998Smarkm sizeof(DESX_CBC_KEY), 9355714Skris EVP_CIPHER_set_asn1_iv, 9455714Skris EVP_CIPHER_get_asn1_iv, 95160814Ssimon NULL, 9668651Skris NULL 9755714Skris }; 9855714Skris 99109998Smarkmconst EVP_CIPHER *EVP_desx_cbc(void) 10055714Skris { 10155714Skris return(&d_xcbc_cipher); 10255714Skris } 10355714Skris 10468651Skrisstatic int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 10568651Skris const unsigned char *iv, int enc) 10655714Skris { 107109998Smarkm DES_cblock *deskey = (DES_cblock *)key; 10855714Skris 109109998Smarkm DES_set_key_unchecked(deskey,&data(ctx)->ks); 110109998Smarkm memcpy(&data(ctx)->inw[0],&key[8],8); 111109998Smarkm memcpy(&data(ctx)->outw[0],&key[16],8); 11268651Skris 11368651Skris return 1; 11455714Skris } 11555714Skris 11668651Skrisstatic int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 117238405Sjkim const unsigned char *in, size_t inl) 11855714Skris { 119238405Sjkim while (inl>=EVP_MAXCHUNK) 120238405Sjkim { 121238405Sjkim DES_xcbc_encrypt(in,out,(long)EVP_MAXCHUNK,&data(ctx)->ks, 122109998Smarkm (DES_cblock *)&(ctx->iv[0]), 123109998Smarkm &data(ctx)->inw, 124109998Smarkm &data(ctx)->outw, 125109998Smarkm ctx->encrypt); 126238405Sjkim inl-=EVP_MAXCHUNK; 127238405Sjkim in +=EVP_MAXCHUNK; 128238405Sjkim out+=EVP_MAXCHUNK; 129238405Sjkim } 130238405Sjkim if (inl) 131238405Sjkim DES_xcbc_encrypt(in,out,(long)inl,&data(ctx)->ks, 132238405Sjkim (DES_cblock *)&(ctx->iv[0]), 133238405Sjkim &data(ctx)->inw, 134238405Sjkim &data(ctx)->outw, 135238405Sjkim ctx->encrypt); 13668651Skris return 1; 13755714Skris } 13855714Skris#endif 139