C加密解密
/*********************************************************
* des.h
* 用户使用des算法头文件
*
*********************************************************/
#ifndef _OPENDESS_H_
#define _OPENDESS_H_ #ifdef __cplusplus
extern "C" {
#endif //ab\0defg //用户使用的函数
int DesEnc(
unsigned char *pInData,//明文
int nInDataLen,
unsigned char *pOutData,//密文
int *pOutDataLen); //用户使用函数des解密
int DesDec(
unsigned char *pInData,//密文
int nInDataLen,
unsigned char *pOutData,//明文
int *pOutDataLen); #ifdef __cplusplus
}
#endif #endif
/******************************************************
*
* des.c
* common des......
*
******************************************************/ #include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h" /*********************************************************
data type definition for Des;
**********************************************************/
#define EN0 0
#define DE1 1 #define DES_KEYBYTES 128
#define DES_KEYLONGS 32
#define DES_BLOCKLEN 8 typedef struct {
unsigned char ek[DES_KEYBYTES];
int ekLen;
unsigned char dk[DES_KEYBYTES];
int dkLen;
unsigned char CbcCtx[DES_BLOCKLEN];
} DES_CTX; typedef struct {
unsigned char ek1[DES_KEYBYTES];
int ek1Len;
unsigned char dk1[DES_KEYBYTES];
int dk1Len;
unsigned char ek2[DES_KEYBYTES];
int ek2Len;
unsigned char dk2[DES_KEYBYTES];
int dk2Len;
unsigned char CbcCtx[DES_BLOCKLEN];
//int IsFirstBlock;
} DES3_CTX; static unsigned char pc1[] = {
, , , , , , , , , , , , , ,
, , , , , , , , , , , , , ,
, , , , , , , , , , , , , ,
, , , , , , , , , , , , , }; static unsigned char pc2[] = {
, , , , , , , , , , , ,
, , , , , , , , , , , ,
, , , , , , , , , , , ,
, , , , , , , , , , , }; static unsigned short bytebit[] = {,,,,,,, };
static unsigned char totrot[] = {,,,,,,,,,,,,,,,};
static unsigned long bigbyte[] = {
0x800000L, 0x400000L, 0x200000L, 0x100000L,
0x80000L, 0x40000L, 0x20000L, 0x10000L,
0x8000L, 0x4000L, 0x2000L, 0x1000L,
0x800L, 0x400L, 0x200L, 0x100L,
0x80L, 0x40L, 0x20L, 0x10L,
0x8L, 0x4L, 0x2L, 0x1L }; //insert digits
static unsigned long SP1[] ={
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[]={
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[]={
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[]={
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[]={
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,0x20000000l,0x42080000l,
0x42080100l,0x00080100l,0x42000000l,0x42080100l,
0x02080000l,0x02000100l,0x40000100l,0x00080000l,
0x00080100l,0x02000100l,0x40000100l,0x00080000l,
0x00000000l,0x40080000l,0x02080100l,0x40000100l }; static unsigned long SP6[]={
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[] = {
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[] = {
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 }; void deskey(unsigned char *key,short edf, unsigned long *kn);
void cookey(register unsigned long *raw1, unsigned long *dough);
//void cpkey(register unsigned long *into);
//void usekey(register unsigned long *from);
//void des(unsigned char *inblock,unsigned char *outblock);
void scrunch(register unsigned char *outof, register unsigned long *into);
void unscrun(register unsigned long *outof, register unsigned char *into);
void desfunc(register unsigned long *block,register unsigned long *keys); /***************** DES Function *****************/
unsigned long OPENCOMM_DesExpandEncKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesEncKey,
unsigned long *ulDesEncKeyLen); unsigned long OPENCOMM_DesExpandDecKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesDecKey,
unsigned long *ulDesDecKeyLen); unsigned long OPENCOMM_DesEncRaw(
unsigned char *pbDesEncKey,
unsigned long ulDesEncKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen); unsigned long OPENCOMM_DesDecRaw(
unsigned char *pbDesDecKey,
unsigned long ulDesDecKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen); int myic_DESDecrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen); int myic_DESEncrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen); void deskey(unsigned char *key,short edf, unsigned long *kn)
{
register int i, j, l, m, n;
unsigned long pc1m[],pcr[]; for ( j = ; j < ; j++ )
{
l = pc1[j];
m = l & ;
pc1m[j] = (((unsigned long) key[l >> ] & (unsigned long)bytebit[m] ) ? :);
}
for ( i = ;i < ; i++)
{
if ( edf == DE1 ) m = ( - i) << ;
else m = i << ;
n = m + ;
kn[m] = kn[n] = 0L;
for ( j = ; j < ; j++ )
{
l = j + totrot[i];
if ( l < ) pcr[j] = pc1m[l];
else pcr[j] = pc1m[l-];
}
for (j = ; j < ; j++ )
{
l = j + totrot[i];
if ( l < ) pcr[j] = pc1m[l];
else pcr[j] = pc1m[l-];
}
for ( j = ; j < ; j++ )
{
if ( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
if ( pcr[pc2[j+]] ) kn[n] |= bigbyte[j];
}
}
return;
} void cookey(register unsigned long *raw1, unsigned long *dough)
{
register unsigned long *cook,*raw0;
register int i; cook = dough;
for ( i = ; i < ; i++, raw1++ ) {
raw0 = raw1++;
*cook = (*raw0 & 0x00fc0000L) << ;
*cook |= (*raw0 & 0x00000fc0L) << ;
*cook |= (*raw1 & 0x00fc0000L) >> ;
*cook++ |= (*raw1 & 0x00000fc0L) >> ;
*cook = (*raw0 & 0x0003f000L) << ;
*cook |= (*raw0 & 0x0000003fL) << ;
*cook |= (*raw1 & 0x0003f000L) >> ;
*cook++ |= (*raw1 & 0x0000003fL);
}
return;
} void scrunch(register unsigned char *outof, register unsigned long *into)
{
*into = (*outof++ & 0xffL) << ;
*into |= (*outof++ & 0xffL) << ;
*into |= (*outof++ & 0xffL) << ;
*into++ |= (*outof++ & 0xffL);
*into = (*outof++ & 0xffL) << ;
*into |= (*outof++ & 0xffL) << ;
*into |= (*outof++ & 0xffL) << ;
*into++ |= (*outof & 0xffL);
return;
} void unscrun(register unsigned long *outof, register unsigned char *into)
{
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into++ = (unsigned char)( *outof++ & 0xffL);
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into++ = (unsigned char)((*outof >> ) & 0xffL);
*into = (unsigned char)( *outof & 0xffL);
return;
} void desfunc(register unsigned long *block,register unsigned long *keys)
{
register unsigned long fval, work, right, leftt;
register int round; leftt = block[];
right = block[];
work = ((leftt >> ) ^ right) & 0x0f0f0f0fL; right ^= work;
leftt ^= (work << );
work = ((leftt >> ) ^ right) & 0x0000ffffL; right ^= work;
leftt ^= (work << );
work = ((right >> ) ^ leftt) & 0x33333333L; leftt ^= work;
right ^= (work << );
work = ((right >> ) ^ leftt) & 0x00ff00ffL; leftt ^= work;
right ^= (work << );
right = ((right << ) | ((right >>) & 1L)) & 0xffffffffL;
work = (leftt ^ right) & 0xaaaaaaaaL; leftt ^= work;
right ^= work;
leftt = ((leftt << ) | ((leftt >> )&1L)) & 0xffffffffL; for (round = ; round < ; round++) {
work = (right << ) | (right >> );
work ^= *keys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> ) & 0x3fL];
fval |= SP3[(work >> ) & 0x3fL];
fval |= SP1[(work >> ) & 0x3fL];
work = right ^ *keys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> ) & 0x3fL];
fval |= SP4[(work >> ) & 0x3fL];
fval |= SP2[(work >> ) & 0x3fL];
leftt ^= fval;
work = (leftt << ) | (leftt >> );
work ^= *keys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> ) & 0x3fL];
fval |= SP3[(work >> ) & 0x3fL];
fval |= SP1[(work >> ) & 0x3fL];
work = leftt ^ *keys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> ) & 0x3fL];
fval |= SP4[(work >> ) & 0x3fL];
fval |= SP2[(work >> ) & 0x3fL];
right ^= fval;
} right = (right << ) | (right >> );
work = (leftt ^ right) & 0xaaaaaaaaL;
leftt ^= work;
right ^= work;
leftt = (leftt << ) | (leftt >> );
work = ((leftt >> ) ^ right) & 0x00ff00ffL;
right ^= work;
leftt ^= (work << );
work = ((leftt >> ) ^ right) & 0x33333333L;
right ^= work;
leftt ^= (work << );
work = ((right >> ) ^ leftt) & 0x0000ffffL;
leftt ^= work;
right ^= (work << );
work = ((right >> ) ^ leftt) & 0x0f0f0f0fL;
leftt ^= work;
right ^= (work << );
*block++ = right;
*block = leftt;
return;
} /*****************************************************************
OPENCOMM_DesExpandEncKey : Expand Des Enc Key 扩展des加密密钥
Return value:
0 : Success
other : failed
Parameters:
pbDesKey : 扩展前的DES密钥(8字节) input
ulDesKeyLen : 扩展前的DES密钥长度 input
pbDesEncKey : 扩展后的DES加密密钥(128字节) output
*ulDesEncKeyLen : 扩展后的DES加密密钥长度 output
*****************************************************************/
unsigned long OPENCOMM_DesExpandEncKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesEncKey,
unsigned long *ulDesEncKeyLen)
{
unsigned long kn[], dough[]; if (ulDesKeyLen != )
return 0xEE20; deskey(pbDesKey, EN0, kn);
cookey(kn, dough);
*ulDesEncKeyLen = DES_KEYBYTES; //32 long = 128 bytes
memcpy(pbDesEncKey, dough, *ulDesEncKeyLen); return ;
} /*****************************************************************
OPENCOMM_DesExpandDecKey : Expand Des Dec Key 扩展des解密密钥
Return value:
0 : Success
other : failed
Parameters:
pbDesKey : 扩展前的DES密钥(8字节) input
ulDesKeyLen : 扩展前的DES密钥长度 input
pbDesDecKey : 扩展后的DES解密密钥(128字节) output
*ulDesDecKeyLen : 扩展后的DES解密密钥长度 output
*****************************************************************/
unsigned long OPENCOMM_DesExpandDecKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesDecKey,
unsigned long *ulDesDecKeyLen)
{
unsigned long kn[], dough[]; if (ulDesKeyLen != )
return 0xEE20; deskey(pbDesKey, DE1, kn);
cookey(kn, dough);
*ulDesDecKeyLen = DES_KEYBYTES; //32 long = 128 bytes
memcpy(pbDesDecKey, dough, *ulDesDecKeyLen); return ;
} /****************************************************************
OPENCOMM_DesEncRaw : Des算法加密小整块明文8字节
Return value:
0 : Success
other : failed
Parameters:
pbDesEncKey : DES加密密钥 input
ulDesEncKeyLen : DES加密密钥长度 input
pbInData : 待加密的明文 input
ulInDataLen : 待加密的明文长度 input
pbOutData : 加密后的密文 output
*ulOutDataLen : 加密后的密文长度 output
*****************************************************************/
unsigned long OPENCOMM_DesEncRaw(
unsigned char *pbDesEncKey,
unsigned long ulDesEncKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen)
{
unsigned long work[], ek[DES_KEYLONGS];
unsigned char cp[DES_BLOCKLEN]; if (ulInDataLen != DES_BLOCKLEN)
return 0xEE20; if (ulDesEncKeyLen != DES_KEYBYTES)
return 0xEE20; memcpy(cp, pbInData, DES_BLOCKLEN);
scrunch(cp,work); // 8 bytes -> 2 long
memcpy(ek, pbDesEncKey, ulDesEncKeyLen);
desfunc(work,ek);
unscrun(work,cp); // 2 long -> 8 bytes
memcpy(pbOutData, cp, DES_BLOCKLEN);
*ulOutDataLen = DES_BLOCKLEN; return ;
} /*****************************************************************
OPENCOMM_DesDecRaw : Des算法解密小整块密文8字节
Return value:
0 : Success
other : failed
Parameters:
pbDesDecKey : DES解密密钥 input
ulDesDecKeyLen : DES解密密钥长度 input
pbInData : 待解密的密文 input
ulInDataLen : 待解密的密文长度 input
pbOutData : 解密后的明文 output
*ulOutDataLen : 解密后的明文长度 output
*****************************************************************/
unsigned long OPENCOMM_DesDecRaw(
unsigned char *pbDesDecKey,
unsigned long ulDesDecKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen)
{
unsigned long work[], dk[DES_KEYLONGS];
unsigned char cp[DES_BLOCKLEN]; if (ulInDataLen != DES_BLOCKLEN)
return 0xEE20; if (ulDesDecKeyLen != DES_KEYBYTES)
return 0xEE20; memcpy(cp, pbInData, DES_BLOCKLEN);
scrunch(cp,work); // 8 bytes -> 2 long
memcpy(dk, pbDesDecKey, ulDesDecKeyLen);
desfunc(work,dk);
unscrun(work,cp); // 2 long -> 8 bytes
memcpy(pbOutData, cp, DES_BLOCKLEN);
// des_enc(pbDesEncKey, pbInData, pbOutData);
*ulOutDataLen = DES_BLOCKLEN; return ;
} /********************* DES *********************/ int myic_DESEncrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
unsigned char DesKeyBuf[];
unsigned char DesEncKeyBuf[];
int EncKeyLen, KeyLen = ;
int retval = , loops, i; if(nInDataLen% != )
return 0xEE20; if(nDesKeyLen != )
return 0xEE20;
KeyLen = nDesKeyLen;
memcpy(DesKeyBuf, pDesKey, nDesKeyLen); retval = OPENCOMM_DesExpandEncKey(DesKeyBuf, KeyLen,
DesEncKeyBuf, (unsigned long *)&EncKeyLen);
if(retval != )
return retval; loops = nInDataLen/;
for(i = ; i < loops; i++)
{
retval = OPENCOMM_DesEncRaw(DesEncKeyBuf, EncKeyLen, pInData + i*,
, pOutData + i*, (unsigned long *)pOutDataLen);
if(retval != )
return retval;
}
*pOutDataLen = nInDataLen;
return retval;
} int myic_DESDecrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
unsigned char DesKeyBuf[];
unsigned char DesDecKeyBuf[];
int DecKeyLen, KeyLen = ;
int retval = , loops, i; if(nInDataLen% != )
return 0xEE20; if(nDesKeyLen != )
return 0xEE20;
KeyLen = nDesKeyLen;
memcpy(DesKeyBuf, pDesKey, nDesKeyLen); retval = OPENCOMM_DesExpandDecKey(DesKeyBuf, KeyLen,
DesDecKeyBuf, (unsigned long *)&DecKeyLen);
if(retval != )
return retval; loops = nInDataLen/;
for(i = ; i < loops; i++)
{
retval = OPENCOMM_DesDecRaw(DesDecKeyBuf, DecKeyLen, pInData + i*,
, pOutData + i*, (unsigned long *)pOutDataLen);
if(retval != )
return retval;
}
*pOutDataLen = nInDataLen;
return retval;
} //对称明文数据打pading
void CW_dataPadAdd(int tag, unsigned char *date, unsigned int dateLen,
unsigned char **padDate, unsigned int *padDateLen)
{
int i, padLen;
unsigned char *pTmp = NULL; pTmp = (unsigned char *)malloc(dateLen+);
if (pTmp == NULL)
{
*padDate = NULL;
return ;
}
memset(pTmp, , dateLen+);
memcpy(pTmp, date, dateLen); if (tag == )
{
padLen = - dateLen % ;
for (i=; i<padLen; i++)
{
pTmp[dateLen+i] = (char)padLen;
}
*padDateLen = dateLen + padLen;
}
else
{
padLen = - dateLen % ;
for (i=; i<padLen; i++)
{
pTmp[dateLen+i] = (char)padLen;
}
} *padDateLen = dateLen + padLen;
*padDate = pTmp;
} #define USER_PASSWORD_KEY "abcd1234" //数据加密
int DesEnc(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
unsigned char *padDate = NULL;
unsigned int padDateLen = ; CW_dataPadAdd(, pInData, (unsigned int )nInDataLen, &padDate, &padDateLen); rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
padDate, (int)padDateLen, pOutData, pOutDataLen);
if (rv != )
{
if (padDate != NULL)
{
free(padDate);
}
return rv;
} if (padDate != NULL)
{
free(padDate);
}
return ;
} //数据加密
int DesEnc_raw(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
unsigned char *padDate = NULL;
unsigned int padDateLen = ; rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, (int)nInDataLen, pOutData, pOutDataLen);
if (rv != )
{
return rv;
}
return ;
} //解密分配内存错误
#define ERR_MALLOC 20
//密码长度不是8的整数倍, 不合法
#define ERR_FILECONT 20 //用户使用函数des解密
int DesDec(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
char padChar;
unsigned char *tmpPlain = NULL; tmpPlain = (unsigned char *)malloc(nInDataLen+);
if (tmpPlain == NULL)
{
return ERR_MALLOC;
}
memset(tmpPlain, , nInDataLen+); //解密
rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, nInDataLen, tmpPlain, pOutDataLen);
if (rv != )
{
if (tmpPlain != NULL) free(tmpPlain);
return rv;
} //去pading
padChar = tmpPlain[*pOutDataLen - ];
if ( (int)padChar<= || (int)padChar>) //异常处理
{
if (tmpPlain) free(tmpPlain);
return ERR_FILECONT;
} *pOutDataLen = *pOutDataLen - (int)padChar;
//memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
memcpy(pOutData, tmpPlain, *pOutDataLen);
if (tmpPlain) free(tmpPlain);
return ;
} //用户使用函数des解密
int DesDec_raw(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
//char padChar;
//unsigned char *tmpPlain = NULL; /*
tmpPlain = (unsigned char *)malloc(nInDataLen+24);
if (tmpPlain == NULL)
{
return ERR_MALLOC;
}
memset(tmpPlain, 0, nInDataLen+24);
*/ //解密
rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, nInDataLen, pOutData, pOutDataLen);
if (rv != )
{
//if (tmpPlain != NULL) free(tmpPlain);
return rv;
}
/*
//去pading
padChar = tmpPlain[*pOutDataLen - 1];
if ( (int)padChar<=0 || (int)padChar>8) //异常处理
{
if (tmpPlain) free(tmpPlain);
return ERR_FILECONT;
} *pOutDataLen = *pOutDataLen - (int)padChar;
//memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
memcpy(pOutData, tmpPlain, *pOutDataLen);
if (tmpPlain) free(tmpPlain);
*/
return ;
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h" int main11()
{
int ret = ;
char *plain = "";//明文
int plainlen = strlen(plain); char plain2[] = {};//明文
int plainlen2 = ; unsigned char cryptbuf[] = {};//密文
int cryptlen = ;
//用户使用的函数
ret = DesEnc(plain, plainlen, cryptbuf, &cryptlen);
if (ret != )
{
printf("func DesEnc() err:%d \n");
return ret;
} //用户使用函数des解密
ret = DesDec(cryptbuf, cryptlen, plain2, &plainlen2);
if (ret != )
{
printf("func DesDec() err:%d \n");
return ret;
} if (plainlen != plainlen2)
{
ret = -;
printf("明文长度和解密后的明文长度 不一样 \n");
return ret;
} if (memcmp(plain2, plain, plainlen) == )
{
printf("明文长度和解密后的明文长度 一样 ok \n");
}
else
{
printf("明文长度和解密后的明文长度 不一样 err \n");
} system("pause");
return ret ;
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h" int FileSymEnc(const char *pfile1, const char *pfile2)//pfile1输入文件，
{
int ret = ;
FILE *fp1= NULL, *fp2 = NULL;
unsigned char plain[];
int plainlen = ; unsigned char cryptbuf[] = {};
int cryptlen = ; int tmplen; fp1 = fopen(pfile1, "rb");//读的方式打开文件
if (fp1 == NULL)
{
goto END;
} fp2 = fopen(pfile2, "wb");//写的方式打开文件
if (fp2 == NULL)
{
goto END;
} while (!feof(fp1))//每次读取4k
{
plainlen = fread(plain, , , fp1);//每次读取4k
if (feof(fp1)) //读完数据以后，判断是否文件结束
{
break;//文件不足以4k,则跳出
} //加密==4k的数据
ret = DesDec_raw(plain, plainlen, cryptbuf, &cryptlen);
if (ret != )
{
printf("func DesEnc() err:%d \n", ret);
goto END;
} tmplen = fwrite(cryptbuf, , cryptlen, fp2);
if (tmplen != cryptlen)//明文和密文的长度是一样的
{
ret = -;
printf("写密文文件失败，请检查是否磁盘已满\n");
goto END;
} //if (plainlen == 4096)
} //加密小于4k的数据
ret = DesEnc(plain, plainlen, cryptbuf, &cryptlen);
if (ret != )
{
printf("func DesEnc() err:%d \n", ret);
goto END;
} tmplen = fwrite(cryptbuf, , cryptlen, fp2);
if (cryptlen != tmplen)//磁盘已满
{
ret = -;
printf("写小于4k文件密文失败，请检查是否磁盘已满\n");
goto END;
} END:
if (fp1 != NULL)
{
fclose(fp1);
}
if (fp2 != NULL)
{
fclose(fp2);
}
return ;
} void main()
{
int ret = ;
const char *file1 = "c:/socketclient.dll";
const char *file2 = "c:/socketclientend.dll"; //const char *file1 = "c:/22.txt";
//const char *file2 = "c:/22enc.txt"; ret = FileSymEnc(file1, file2);
if (ret != )
{
printf("func FileSymEnc() err\n " );
return ;
} system("pause");
return ;
}
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