185 lines
6.0 KiB
C
185 lines
6.0 KiB
C
/* crypto/des/xcbc_enc.c */
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/* Copyright (C) 1995-1996 Eric Young (eay@mincom.oz.au)
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* All rights reserved.
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*
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* This file is part of an SSL implementation written
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* by Eric Young (eay@mincom.oz.au).
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* The implementation was written so as to conform with Netscapes SSL
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* specification. This library and applications are
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* FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
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* as long as the following conditions are aheared to.
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed. If this code is used in a product,
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* Eric Young should be given attribution as the author of the parts used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Eric Young (eay@mincom.oz.au)
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include "des_locl.h"
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/* RSA's DESX */
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static unsigned char desx_white_in2out[256]={
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0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0,
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0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A,
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0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36,
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0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C,
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0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60,
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0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA,
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0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E,
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0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF,
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0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6,
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0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3,
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0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C,
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0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2,
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0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5,
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0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5,
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0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F,
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0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB,
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};
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void des_xwhite_in2out(des_key,in_white,out_white)
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des_cblock (*des_key);
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des_cblock (*in_white);
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des_cblock (*out_white);
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{
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unsigned char *key,*in,*out;
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int out0,out1;
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int i;
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key=(unsigned char *)des_key;
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in=(unsigned char *)in_white;
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out=(unsigned char *)out_white;
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out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0;
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out0=out1=0;
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for (i=0; i<8; i++)
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{
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out[i]=key[i]^desx_white_in2out[out0^out1];
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out0=out1;
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out1=(int)out[i&0x07];
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}
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out0=out[0];
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out1=out[i];
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for (i=0; i<8; i++)
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{
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out[i]=in[i]^desx_white_in2out[out0^out1];
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out0=out1;
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out1=(int)out[i&0x07];
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}
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}
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void des_xcbc_encrypt(input, output, length, schedule, ivec, inw,outw,encrypt)
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des_cblock (*input);
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des_cblock (*output);
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long length;
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des_key_schedule schedule;
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des_cblock (*ivec);
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des_cblock (*inw);
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des_cblock (*outw);
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int encrypt;
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{
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register DES_LONG tin0,tin1;
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register DES_LONG tout0,tout1,xor0,xor1;
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register DES_LONG inW0,inW1,outW0,outW1;
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register unsigned char *in,*out;
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register long l=length;
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DES_LONG tin[2];
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unsigned char *iv;
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in=(unsigned char *)inw;
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c2l(in,inW0);
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c2l(in,inW1);
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in=(unsigned char *)outw;
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c2l(in,outW0);
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c2l(in,outW1);
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in=(unsigned char *)input;
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out=(unsigned char *)output;
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iv=(unsigned char *)ivec;
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if (encrypt)
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{
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c2l(iv,tout0);
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c2l(iv,tout1);
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for (; l>0; l-=8)
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{
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if (l >= 8)
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{
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c2l(in,tin0);
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c2l(in,tin1);
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}
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else
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c2ln(in,tin0,tin1,l);
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tin0^=tout0^inW0; tin[0]=tin0;
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tin1^=tout1^inW1; tin[1]=tin1;
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des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
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tout0=tin[0]^outW0; l2c(tout0,out);
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tout1=tin[1]^outW1; l2c(tout1,out);
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}
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iv=(unsigned char *)ivec;
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l2c(tout0,iv);
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l2c(tout1,iv);
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}
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else
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{
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c2l(iv,xor0);
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c2l(iv,xor1);
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for (; l>0; l-=8)
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{
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c2l(in,tin0); tin[0]=tin0^outW0;
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c2l(in,tin1); tin[1]=tin1^outW1;
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des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT);
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tout0=tin[0]^xor0^inW0;
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tout1=tin[1]^xor1^inW1;
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if (l >= 8)
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{
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l2c(tout0,out);
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l2c(tout1,out);
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}
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else
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l2cn(tout0,tout1,out,l);
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xor0=tin0;
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xor1=tin1;
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}
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iv=(unsigned char *)ivec;
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l2c(xor0,iv);
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l2c(xor1,iv);
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}
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tin0=tin1=tout0=tout1=xor0=xor1=0;
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inW0=inW1=outW0=outW1=0;
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tin[0]=tin[1]=0;
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}
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