xcbc_enc.c revision 109998
155714Skris/* crypto/des/xcbc_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. 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 "des_locl.h" 6055714Skris 6155714Skris/* RSA's DESX */ 6255714Skris 6355714Skrisstatic unsigned char desx_white_in2out[256]={ 6455714Skris0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0, 6555714Skris0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A, 6655714Skris0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36, 6755714Skris0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C, 6855714Skris0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60, 6955714Skris0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA, 7055714Skris0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E, 7155714Skris0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF, 7255714Skris0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6, 7355714Skris0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3, 7455714Skris0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C, 7555714Skris0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2, 7655714Skris0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5, 7755714Skris0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5, 7855714Skris0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F, 7955714Skris0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB, 8055714Skris }; 8155714Skris 82109998Smarkmvoid DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white, 83109998Smarkm DES_cblock *out_white) 8455714Skris { 8555714Skris int out0,out1; 8655714Skris int i; 8755714Skris const unsigned char *key = &(*des_key)[0]; 8855714Skris const unsigned char *in = &(*in_white)[0]; 8955714Skris unsigned char *out = &(*out_white)[0]; 9055714Skris 9155714Skris out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0; 9255714Skris out0=out1=0; 9355714Skris for (i=0; i<8; i++) 9455714Skris { 9555714Skris out[i]=key[i]^desx_white_in2out[out0^out1]; 9655714Skris out0=out1; 9755714Skris out1=(int)out[i&0x07]; 9855714Skris } 9955714Skris 10055714Skris out0=out[0]; 10155714Skris out1=out[i]; 10255714Skris for (i=0; i<8; i++) 10355714Skris { 10455714Skris out[i]=in[i]^desx_white_in2out[out0^out1]; 10555714Skris out0=out1; 10655714Skris out1=(int)out[i&0x07]; 10755714Skris } 10855714Skris } 10955714Skris 110109998Smarkmvoid DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, 111109998Smarkm long length, DES_key_schedule *schedule, 112109998Smarkm DES_cblock *ivec, const_DES_cblock *inw, 113109998Smarkm const_DES_cblock *outw, int enc) 11455714Skris { 11555714Skris register DES_LONG tin0,tin1; 11655714Skris register DES_LONG tout0,tout1,xor0,xor1; 11755714Skris register DES_LONG inW0,inW1,outW0,outW1; 11855714Skris register const unsigned char *in2; 11955714Skris register long l=length; 12055714Skris DES_LONG tin[2]; 12155714Skris unsigned char *iv; 12255714Skris 12355714Skris in2 = &(*inw)[0]; 12455714Skris c2l(in2,inW0); 12555714Skris c2l(in2,inW1); 12655714Skris in2 = &(*outw)[0]; 12755714Skris c2l(in2,outW0); 12855714Skris c2l(in2,outW1); 12955714Skris 13055714Skris iv = &(*ivec)[0]; 13155714Skris 13255714Skris if (enc) 13355714Skris { 13455714Skris c2l(iv,tout0); 13555714Skris c2l(iv,tout1); 13655714Skris for (l-=8; l>=0; l-=8) 13755714Skris { 13855714Skris c2l(in,tin0); 13955714Skris c2l(in,tin1); 14055714Skris tin0^=tout0^inW0; tin[0]=tin0; 14155714Skris tin1^=tout1^inW1; tin[1]=tin1; 142109998Smarkm DES_encrypt1(tin,schedule,DES_ENCRYPT); 14355714Skris tout0=tin[0]^outW0; l2c(tout0,out); 14455714Skris tout1=tin[1]^outW1; l2c(tout1,out); 14555714Skris } 14655714Skris if (l != -8) 14755714Skris { 14855714Skris c2ln(in,tin0,tin1,l+8); 14955714Skris tin0^=tout0^inW0; tin[0]=tin0; 15055714Skris tin1^=tout1^inW1; tin[1]=tin1; 151109998Smarkm DES_encrypt1(tin,schedule,DES_ENCRYPT); 15255714Skris tout0=tin[0]^outW0; l2c(tout0,out); 15355714Skris tout1=tin[1]^outW1; l2c(tout1,out); 15455714Skris } 15555714Skris iv = &(*ivec)[0]; 15655714Skris l2c(tout0,iv); 15755714Skris l2c(tout1,iv); 15855714Skris } 15955714Skris else 16055714Skris { 16155714Skris c2l(iv,xor0); 16255714Skris c2l(iv,xor1); 16355714Skris for (l-=8; l>0; l-=8) 16455714Skris { 16555714Skris c2l(in,tin0); tin[0]=tin0^outW0; 16655714Skris c2l(in,tin1); tin[1]=tin1^outW1; 167109998Smarkm DES_encrypt1(tin,schedule,DES_DECRYPT); 16855714Skris tout0=tin[0]^xor0^inW0; 16955714Skris tout1=tin[1]^xor1^inW1; 17055714Skris l2c(tout0,out); 17155714Skris l2c(tout1,out); 17255714Skris xor0=tin0; 17355714Skris xor1=tin1; 17455714Skris } 17555714Skris if (l != -8) 17655714Skris { 17755714Skris c2l(in,tin0); tin[0]=tin0^outW0; 17855714Skris c2l(in,tin1); tin[1]=tin1^outW1; 179109998Smarkm DES_encrypt1(tin,schedule,DES_DECRYPT); 18055714Skris tout0=tin[0]^xor0^inW0; 18155714Skris tout1=tin[1]^xor1^inW1; 18255714Skris l2cn(tout0,tout1,out,l+8); 18355714Skris xor0=tin0; 18455714Skris xor1=tin1; 18555714Skris } 18655714Skris 18755714Skris iv = &(*ivec)[0]; 18855714Skris l2c(xor0,iv); 18955714Skris l2c(xor1,iv); 19055714Skris } 19155714Skris tin0=tin1=tout0=tout1=xor0=xor1=0; 19255714Skris inW0=inW1=outW0=outW1=0; 19355714Skris tin[0]=tin[1]=0; 19455714Skris } 19555714Skris 196