DES算法使用示例

testDES.cpp 使用示例

// testDES.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "utility.h"#include <iostream>using namespace std;/* 加解密函数使用示例，在VisualStudio2008+SP1下测试通过*/int _tmain(int argc, _TCHAR* argv[]){unsigned char bufSrc[]={"123"};unsigned char bufDes[256];unsigned char bufKey[]={"MyKey"};memset(bufDes,0,sizeof(bufDes));cout<<"The Clear Text Before Test:"<<bufSrc<<endl;DesEncrypt(bufKey,bufSrc,bufDes,sizeof(bufSrc));DesDecrypt(bufKey,bufDes,bufSrc,strlen((char *)bufDes));cout<<"The Clear Text After Test:"<<bufSrc<<endl;return 0;}

Utility.h    DES封闭文件，头文件

#include "windows.h"/*入口参数：szKey 密码（钥匙） lpbySrc 明文 iLength 明文长度出口参数：lpbyDest 暗文返回 ：TRUE 成功 FALSE 失败*/BOOL DesEncrypt(unsigned char * szKey, unsigned char * lpbySrc, unsigned char * lpbyDest, int iLength);/*入口参数：szKey 密码（钥匙） lpbySrc 暗文 iLength 暗文长度出口参数：lpbyDest 明文返回 ：TRUE 成功 FALSE 失败*/BOOL DesDecrypt(unsigned char * szKey, unsigned char * lpbySrc, unsigned char * lpbyDest, int iLength);

Utility.cpp DES封闭文件，源文件

#include "utility.h"#include "d3des.h"#pragma warning(disable : 4996)BOOL DesEncrypt(unsigned char * szKey, unsigned char * lpbySrc, unsigned char * lpbyDest, int iLength) { BYTE byKey[8] = {0}; CHAR szTempKey[20]; strcpy(szTempKey, (char *)szKey); makekey(szTempKey, byKey); deskey(byKey, EN0); for (int i = 0; i < iLength; i += 8) des(lpbySrc + i, lpbyDest + i); return TRUE; } BOOL DesDecrypt(unsigned char * szKey, unsigned char * lpbySrc, unsigned char * lpbyDest, int iLength) { BYTE byKey[8] = {0}; CHAR szTempKey[20]; strcpy(szTempKey, (char *)szKey); makekey(szTempKey, byKey); deskey(byKey, DE1); for (int i = 0; i < iLength; i += 8) des(lpbySrc + i, lpbyDest + i); return TRUE; }

d3des.h   DES算法，头文件

/* d3des.h - * *Headers and defines for d3des.c *Graven Imagery, 1992. * * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge *(GEnie : OUTER; CIS : [71755,204]) */#define D2_DES/* include double-length support */#define D3_DES/* include triple-length support */#ifdef D3_DES#ifndef D2_DES#define D2_DES/* D2_DES is needed for D3_DES */#endif#endif#define EN00/* MODE == encrypt */#define DE11/* MODE == decrypt *//* A useful alias on 68000-ish machines, but NOT USED HERE. */typedef union {unsigned long blok[2];unsigned short word[4];unsigned char byte[8];} M68K;extern void deskey(unsigned char *, short);/* hexkey[8] MODE * Sets the internal key register according to the hexadecimal * key contained in the 8 bytes of hexkey, according to the DES, * for encryption or decryption according to MODE. */extern void usekey(unsigned long *);/* cookedkey[32] * Loads the internal key register with the data in cookedkey. */extern void cpkey(unsigned long *);/* cookedkey[32] * Copies the contents of the internal key register into the storage * located at &cookedkey[0]. */extern void des(unsigned char *, unsigned char *);/* from[8] to[8] * Encrypts/Decrypts (according to the key currently loaded in the * internal key register) one block of eight bytes at address 'from' * into the block at address 'to'. They can be the same. */#ifdef D2_DES#define desDkey(a,b)des2key((a),(b))extern void des2key(unsigned char *, short);/* hexkey[16] MODE * Sets the internal key registerS according to the hexadecimal * keyS contained in the 16 bytes of hexkey, according to the DES, * for DOUBLE encryption or decryption according to MODE. * NOTE: this clobbers all three key registers! */extern void Ddes(unsigned char *, unsigned char *);/* from[8] to[8] * Encrypts/Decrypts (according to the keyS currently loaded in the * internal key registerS) one block of eight bytes at address 'from' * into the block at address 'to'. They can be the same. */extern void D2des(unsigned char *, unsigned char *);/* from[16] to[16] * Encrypts/Decrypts (according to the keyS currently loaded in the * internal key registerS) one block of SIXTEEN bytes at address 'from' * into the block at address 'to'. They can be the same. */extern void makekey(char *, unsigned char *);/**password,single-length key[8] * With a double-length default key, this routine hashes a NULL-terminated * string into an eight-byte random-looking key, suitable for use with the * deskey() routine. */#define makeDkey(a,b)make2key((a),(b))extern void make2key(char *, unsigned char *);/**password,double-length key[16] * With a double-length default key, this routine hashes a NULL-terminated * string into a sixteen-byte random-looking key, suitable for use with the * des2key() routine. */#ifndef D3_DES/* D2_DES only */#define useDkey(a)use2key((a))#define cpDkey(a)cp2key((a))extern void use2key(unsigned long *);/* cookedkey[64] * Loads the internal key registerS with the data in cookedkey. * NOTE: this clobbers all three key registers! */extern void cp2key(unsigned long *);/* cookedkey[64] * Copies the contents of the internal key registerS into the storage * located at &cookedkey[0]. */#else/* D3_DES too */#define useDkey(a)use3key((a))#define cpDkey(a)cp3key((a))extern void des3key(unsigned char *, short);/* hexkey[24] MODE * Sets the internal key registerS according to the hexadecimal * keyS contained in the 24 bytes of hexkey, according to the DES, * for DOUBLE encryption or decryption according to MODE. */extern void use3key(unsigned long *);/* cookedkey[96] * Loads the 3 internal key registerS with the data in cookedkey. */extern void cp3key(unsigned long *);/* cookedkey[96] * Copies the contents of the 3 internal key registerS into the storage * located at &cookedkey[0]. */extern void make3key(char *, unsigned char *);/**password,triple-length key[24] * With a triple-length default key, this routine hashes a NULL-terminated * string into a twenty-four-byte random-looking key, suitable for use with * the des3key() routine. */#endif/* D3_DES */#endif/* D2_DES *//* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery ********************************************************************/

d3des.cpp DES算法，源文件

/* D3DES (V5.09) - * * A portable, public domain, version of the Data Encryption Standard. * * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge. * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation * code; Jim Gillogly & Phil Karn for the DES key schedule code; Dennis * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau, * for humouring me on. * * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge. * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992. */#include "d3des.h"static void scrunch(unsigned char *, unsigned long *);static void unscrun(unsigned long *, unsigned char *);static void desfunc(unsigned long *, unsigned long *);static void cookey(unsigned long *);static unsigned long KnL[32] = { 0L };static unsigned long KnR[32] = { 0L };static unsigned long Kn3[32] = { 0L };static unsigned char Df_Key[24] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x89,0xab,0xcd,0xef,0x01,0x23,0x45,0x67 };static unsigned short bytebit[8]= {0200, 0100, 040, 020, 010, 04, 02, 01 };static unsigned long bigbyte[24] = {0x800000L,0x400000L,0x200000L,0x100000L,0x80000L,0x40000L,0x20000L,0x10000L,0x8000L,0x4000L,0x2000L,0x1000L,0x800L, 0x400L, 0x200L, 0x100L,0x80L,0x40L,0x20L,0x10L,0x8L,0x4L,0x2L,0x1L};/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */static unsigned char pc1[56] = {56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26,18, 10, 2, 59, 51, 43, 35,62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,13, 5, 60, 52, 44, 36, 28,20, 12, 4, 27, 19, 11, 3 };static unsigned char totrot[16] = {1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 };static unsigned char pc2[48] = {13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };void deskey(unsigned char *key, short edf)/* Thanks to James Gillogly & Phil Karn! */{register int i, j, l, m, n;unsigned char pc1m[56], pcr[56];unsigned long kn[32];for ( j = 0; j < 56; j++ ) {l = pc1[j];m = l & 07;pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;}for( i = 0; i < 16; i++ ) {if( edf == DE1 ) m = (15 - i) << 1;else m = i << 1;n = m + 1;kn[m] = kn[n] = 0L;for( j = 0; j < 28; j++ ) {l = j + totrot[i];if( l < 28 ) pcr[j] = pc1m[l];else pcr[j] = pc1m[l - 28];}for( j = 28; j < 56; j++ ) { l = j + totrot[i]; if( l < 56 ) pcr[j] = pc1m[l]; else pcr[j] = pc1m[l - 28]; }for( j = 0; j < 24; j++ ) {if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];}}cookey(kn);return;}static void cookey(register unsigned long *raw1){register unsigned long *cook, *raw0;unsigned long dough[32];register int i;cook = dough;for( i = 0; i < 16; i++, raw1++ ) {raw0 = raw1++;*cook = (*raw0 & 0x00fc0000L) << 6;*cook|= (*raw0 & 0x00000fc0L) << 10;*cook|= (*raw1 & 0x00fc0000L) >> 10;*cook++ |= (*raw1 & 0x00000fc0L) >> 6;*cook = (*raw0 & 0x0003f000L) << 12;*cook|= (*raw0 & 0x0000003fL) << 16;*cook|= (*raw1 & 0x0003f000L) >> 4;*cook++ |= (*raw1 & 0x0000003fL);}usekey(dough);return;}void cpkey(register unsigned long *into){register unsigned long *from, *endp;from = KnL, endp = &KnL[32];while( from < endp ) *into++ = *from++;return;}void usekey(register unsigned long *from){register unsigned long *to, *endp;to = KnL, endp = &KnL[32];while( to < endp ) *to++ = *from++;return;}void des(unsigned char *inblock,unsigned char *outblock){unsigned long work[2];scrunch(inblock, work);desfunc(work, KnL);unscrun(work, outblock);return;}static void scrunch(register unsigned char *outof,register unsigned long *into){*into = (*outof++ & 0xffL) << 24;*into|= (*outof++ & 0xffL) << 16;*into|= (*outof++ & 0xffL) << 8;*into++ |= (*outof++ & 0xffL);*into = (*outof++ & 0xffL) << 24;*into|= (*outof++ & 0xffL) << 16;*into|= (*outof++ & 0xffL) << 8;*into|= (*outof & 0xffL);return;}static void unscrun(register unsigned long *outof,register unsigned char *into){*into++ = (*outof >> 24) & 0xffL;*into++ = (*outof >> 16) & 0xffL;*into++ = (*outof >> 8) & 0xffL;*into++ = *outof++ & 0xffL;*into++ = (*outof >> 24) & 0xffL;*into++ = (*outof >> 16) & 0xffL;*into++ = (*outof >> 8) & 0xffL;*into= *outof & 0xffL;return;}static unsigned long SP1[64] = {0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };static unsigned long SP2[64] = {0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };static unsigned long SP3[64] = {0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };static unsigned long SP4[64] = {0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };static unsigned long SP5[64] = {0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };static unsigned long SP6[64] = {0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L };static unsigned long SP7[64] = {0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };static unsigned long SP8[64] = {0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };static void desfunc(register unsigned long *block,register unsigned long *keys){register unsigned long fval, work, right, leftt;register int round;leftt = block[0];right = block[1];work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;right ^= work;leftt ^= (work << 4);work = ((leftt >> 16) ^ right) & 0x0000ffffL;right ^= work;leftt ^= (work << 16);work = ((right >> 2) ^ leftt) & 0x33333333L;leftt ^= work;right ^= (work << 2);work = ((right >> 8) ^ leftt) & 0x00ff00ffL;leftt ^= work;right ^= (work << 8);right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL;work = (leftt ^ right) & 0xaaaaaaaaL;leftt ^= work;right ^= work;leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL;for( round = 0; round < 8; round++ ) {work = (right << 28) | (right >> 4);work ^= *keys++;fval = SP7[ work & 0x3fL];fval |= SP5[(work >> 8) & 0x3fL];fval |= SP3[(work >> 16) & 0x3fL];fval |= SP1[(work >> 24) & 0x3fL];work = right ^ *keys++;fval |= SP8[ work & 0x3fL];fval |= SP6[(work >> 8) & 0x3fL];fval |= SP4[(work >> 16) & 0x3fL];fval |= SP2[(work >> 24) & 0x3fL];leftt ^= fval;work = (leftt << 28) | (leftt >> 4);work ^= *keys++;fval = SP7[ work & 0x3fL];fval |= SP5[(work >> 8) & 0x3fL];fval |= SP3[(work >> 16) & 0x3fL];fval |= SP1[(work >> 24) & 0x3fL];work = leftt ^ *keys++;fval |= SP8[ work & 0x3fL];fval |= SP6[(work >> 8) & 0x3fL];fval |= SP4[(work >> 16) & 0x3fL];fval |= SP2[(work >> 24) & 0x3fL];right ^= fval;}right = (right << 31) | (right >> 1);work = (leftt ^ right) & 0xaaaaaaaaL;leftt ^= work;right ^= work;leftt = (leftt << 31) | (leftt >> 1);work = ((leftt >> 8) ^ right) & 0x00ff00ffL;right ^= work;leftt ^= (work << 8);work = ((leftt >> 2) ^ right) & 0x33333333L;right ^= work;leftt ^= (work << 2);work = ((right >> 16) ^ leftt) & 0x0000ffffL;leftt ^= work;right ^= (work << 16);work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;leftt ^= work;right ^= (work << 4);*block++ = right;*block = leftt;return;}#ifdef D2_DESvoid des2key(unsigned char *hexkey /* stomps on Kn3 too */,short mode/* unsigned char[16] */){short revmod;revmod = (mode == EN0) ? DE1 : EN0;deskey(&hexkey[8], revmod);cpkey(KnR);deskey(hexkey, mode);cpkey(Kn3);/* Kn3 = KnL */return;}void Ddes(unsigned char *from,unsigned char *into/* unsigned char[8] */){unsigned long work[2];scrunch(from, work);desfunc(work, KnL);desfunc(work, KnR);desfunc(work, Kn3);unscrun(work, into);return;}void D2des(unsigned char *from,/* unsigned char[16] */unsigned char *into/* unsigned char[16] */){unsigned long *right, *l1, swap;unsigned long leftt[2], bufR[2];right = bufR;l1 = &leftt[1];scrunch(from, leftt);scrunch(&from[8], right);desfunc(leftt, KnL);desfunc(right, KnL);swap = *l1;*l1 = *right;*right = swap;desfunc(leftt, KnR);desfunc(right, KnR);swap = *l1;*l1 = *right;*right = swap;desfunc(leftt, Kn3);desfunc(right, Kn3);unscrun(leftt, into);unscrun(right, &into[8]);return;}void makekey(register char *aptr/* NULL-terminated */, register unsigned char *kptr/* unsigned char[8] */){register unsigned char *store;register int first, i;unsigned long savek[96];cpDkey(savek);des2key(Df_Key, EN0);for( i = 0; i < 8; i++ ) kptr[i] = Df_Key[i];first = 1;while( (*aptr != '/0') || first ) {store = kptr;for( i = 0; i < 8 && (*aptr != '/0'); i++ ) {*store++ ^= *aptr & 0x7f;*aptr++ = '/0';}Ddes(kptr, kptr);first = 0;}useDkey(savek);return;}void make2key(register char *aptr/* NULL-terminated */, register unsigned char *kptr/* unsigned char[16] */){register unsigned char *store;register int first, i;unsigned long savek[96];cpDkey(savek);des2key(Df_Key, EN0);for( i = 0; i < 16; i++ ) kptr[i] = Df_Key[i];first = 1;while( (*aptr != '/0') || first ) {store = kptr;for( i = 0; i < 16 && (*aptr != '/0'); i++ ) {*store++ ^= *aptr & 0x7f;*aptr++ = '/0';}D2des(kptr, kptr);first = 0;}useDkey(savek);return;}#ifndef D3_DES/* D2_DES only */#ifdefD2_DES/* iff D2_DES! */void cp2key(into)register unsigned long *into;/* unsigned long[64] */{register unsigned long *from, *endp;cpkey(into);into = &into[32];from = KnR, endp = &KnR[32];while( from < endp ) *into++ = *from++;return;}void use2key(from)/* stomps on Kn3 too */register unsigned long *from;/* unsigned long[64] */{register unsigned long *to, *endp;usekey(from);from = &from[32];to = KnR, endp = &KnR[32];while( to < endp ) *to++ = *from++;cpkey(Kn3);/* Kn3 = KnL */return;}#endif/* iff D2_DES */#else/* D3_DES too */static void D3des(unsigned char *, unsigned char *);void des3key(unsigned char *hexkey/* unsigned char[24] */, short mode){unsigned char *first, *third;short revmod;if( mode == EN0 ) {revmod = DE1;first = hexkey;third = &hexkey[16];}else {revmod = EN0;first = &hexkey[16];third = hexkey;}deskey(&hexkey[8], revmod);cpkey(KnR);deskey(third, mode);cpkey(Kn3);deskey(first, mode);return;}void cp3key(register unsigned long *into/* unsigned long[96] */){register unsigned long *from, *endp;cpkey(into);into = &into[32];from = KnR, endp = &KnR[32];while( from < endp ) *into++ = *from++;from = Kn3, endp = &Kn3[32];while( from < endp ) *into++ = *from++;return;}void use3key(register unsigned long *from/* unsigned long[96] */){register unsigned long *to, *endp;usekey(from);from = &from[32];to = KnR, endp = &KnR[32];while( to < endp ) *to++ = *from++;to = Kn3, endp = &Kn3[32];while( to < endp ) *to++ = *from++;return;}static void D3des(unsigned char *from/* unsigned char[24] */, unsigned char *into/* unsigned char[24] */)/* amateur theatrics */{unsigned long swap, leftt[2], middl[2], right[2];scrunch(from, leftt);scrunch(&from[8], middl);scrunch(&from[16], right);desfunc(leftt, KnL);desfunc(middl, KnL);desfunc(right, KnL);swap = leftt[1];leftt[1] = middl[0];middl[0] = swap;swap = middl[1];middl[1] = right[0];right[0] = swap;desfunc(leftt, KnR);desfunc(middl, KnR);desfunc(right, KnR);swap = leftt[1];leftt[1] = middl[0];middl[0] = swap;swap = middl[1];middl[1] = right[0];right[0] = swap;desfunc(leftt, Kn3);desfunc(middl, Kn3);desfunc(right, Kn3);unscrun(leftt, into);unscrun(middl, &into[8]);unscrun(right, &into[16]);return;}void make3key(register char *aptr/* NULL-terminated */, register unsigned char *kptr/* unsigned char[24] */){register unsigned char *store;register int first, i;unsigned long savek[96];cp3key(savek);des3key(Df_Key, EN0);for( i = 0; i < 24; i++ ) kptr[i] = Df_Key[i];first = 1;while( (*aptr != '/0') || first ) {store = kptr;for( i = 0; i < 24 && (*aptr != '/0'); i++ ) {*store++ ^= *aptr & 0x7f;*aptr++ = '/0';}D3des(kptr, kptr);first = 0;}use3key(savek);return;}#endif/* D3_DES */#endif/* D2_DES *//* Validation sets: * * Single-length key, single-length plaintext - * Key : 0123 4567 89ab cdef * Plain : 0123 4567 89ab cde7 * Cipher : c957 4425 6a5e d31d * * Double-length key, single-length plaintext - * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 * Plain : 0123 4567 89ab cde7 * Cipher : 7f1d 0a77 826b 8aff * * Double-length key, double-length plaintext - * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff * Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7 * * Triple-length key, single-length plaintext - * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567 * Plain : 0123 4567 89ab cde7 * Cipher : de0b 7c06 ae5e 0ed5 * * Triple-length key, double-length plaintext - * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567 * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff * Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5 * * d3des V5.0a rwo 9208.07 18:44 Graven Imagery **********************************************************************/