#include "stdafx.h"
#include "des.h"
#include <string.h>
#include "..\..\common\Base64\Base64.h"
#include "..\..\common\EncodingConversion\EncodingConversion.h"

static const unsigned char deskey[9] = "mygz/ndu";//lyfz.net的偶校验结果;
//static const unsigned char desiv[9] = "WorkbyIT";

// 32-bit integer manipulation macros (big endian)
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i)                             \
{                                                       \
	(n) = ( (unsigned long) (b)[(i)] << 24 )        \
	| ( (unsigned long) (b)[(i) + 1] << 16 )        \
	| ( (unsigned long) (b)[(i) + 2] <<  8 )        \
	| ( (unsigned long) (b)[(i) + 3]       );       \
}
#endif

#ifndef PUT_ULONG_BE
#define PUT_ULONG_BE(n,b,i)                             \
{                                                       \
	(b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
	(b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
	(b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
	(b)[(i) + 3] = (unsigned char) ( (n)       );       \
}
#endif

//Expanded DES S-boxes
static const unsigned long SB1[64] =
{
	0x01010400, 0x00000000, 0x00010000, 0x01010404,
	0x01010004, 0x00010404, 0x00000004, 0x00010000,
	0x00000400, 0x01010400, 0x01010404, 0x00000400,
	0x01000404, 0x01010004, 0x01000000, 0x00000004,
	0x00000404, 0x01000400, 0x01000400, 0x00010400,
	0x00010400, 0x01010000, 0x01010000, 0x01000404,
	0x00010004, 0x01000004, 0x01000004, 0x00010004,
	0x00000000, 0x00000404, 0x00010404, 0x01000000,
	0x00010000, 0x01010404, 0x00000004, 0x01010000,
	0x01010400, 0x01000000, 0x01000000, 0x00000400,
	0x01010004, 0x00010000, 0x00010400, 0x01000004,
	0x00000400, 0x00000004, 0x01000404, 0x00010404,
	0x01010404, 0x00010004, 0x01010000, 0x01000404,
	0x01000004, 0x00000404, 0x00010404, 0x01010400,
	0x00000404, 0x01000400, 0x01000400, 0x00000000,
	0x00010004, 0x00010400, 0x00000000, 0x01010004
};

static const unsigned long SB2[64] =
{
	0x80108020, 0x80008000, 0x00008000, 0x00108020,
	0x00100000, 0x00000020, 0x80100020, 0x80008020,
	0x80000020, 0x80108020, 0x80108000, 0x80000000,
	0x80008000, 0x00100000, 0x00000020, 0x80100020,
	0x00108000, 0x00100020, 0x80008020, 0x00000000,
	0x80000000, 0x00008000, 0x00108020, 0x80100000,
	0x00100020, 0x80000020, 0x00000000, 0x00108000,
	0x00008020, 0x80108000, 0x80100000, 0x00008020,
	0x00000000, 0x00108020, 0x80100020, 0x00100000,
	0x80008020, 0x80100000, 0x80108000, 0x00008000,
	0x80100000, 0x80008000, 0x00000020, 0x80108020,
	0x00108020, 0x00000020, 0x00008000, 0x80000000,
	0x00008020, 0x80108000, 0x00100000, 0x80000020,
	0x00100020, 0x80008020, 0x80000020, 0x00100020,
	0x00108000, 0x00000000, 0x80008000, 0x00008020,
	0x80000000, 0x80100020, 0x80108020, 0x00108000
};

static const unsigned long SB3[64] =
{
	0x00000208, 0x08020200, 0x00000000, 0x08020008,
	0x08000200, 0x00000000, 0x00020208, 0x08000200,
	0x00020008, 0x08000008, 0x08000008, 0x00020000,
	0x08020208, 0x00020008, 0x08020000, 0x00000208,
	0x08000000, 0x00000008, 0x08020200, 0x00000200,
	0x00020200, 0x08020000, 0x08020008, 0x00020208,
	0x08000208, 0x00020200, 0x00020000, 0x08000208,
	0x00000008, 0x08020208, 0x00000200, 0x08000000,
	0x08020200, 0x08000000, 0x00020008, 0x00000208,
	0x00020000, 0x08020200, 0x08000200, 0x00000000,
	0x00000200, 0x00020008, 0x08020208, 0x08000200,
	0x08000008, 0x00000200, 0x00000000, 0x08020008,
	0x08000208, 0x00020000, 0x08000000, 0x08020208,
	0x00000008, 0x00020208, 0x00020200, 0x08000008,
	0x08020000, 0x08000208, 0x00000208, 0x08020000,
	0x00020208, 0x00000008, 0x08020008, 0x00020200
};

static const unsigned long SB4[64] =
{
	0x00802001, 0x00002081, 0x00002081, 0x00000080,
	0x00802080, 0x00800081, 0x00800001, 0x00002001,
	0x00000000, 0x00802000, 0x00802000, 0x00802081,
	0x00000081, 0x00000000, 0x00800080, 0x00800001,
	0x00000001, 0x00002000, 0x00800000, 0x00802001,
	0x00000080, 0x00800000, 0x00002001, 0x00002080,
	0x00800081, 0x00000001, 0x00002080, 0x00800080,
	0x00002000, 0x00802080, 0x00802081, 0x00000081,
	0x00800080, 0x00800001, 0x00802000, 0x00802081,
	0x00000081, 0x00000000, 0x00000000, 0x00802000,
	0x00002080, 0x00800080, 0x00800081, 0x00000001,
	0x00802001, 0x00002081, 0x00002081, 0x00000080,
	0x00802081, 0x00000081, 0x00000001, 0x00002000,
	0x00800001, 0x00002001, 0x00802080, 0x00800081,
	0x00002001, 0x00002080, 0x00800000, 0x00802001,
	0x00000080, 0x00800000, 0x00002000, 0x00802080
};

static const unsigned long SB5[64] =
{
	0x00000100, 0x02080100, 0x02080000, 0x42000100,
	0x00080000, 0x00000100, 0x40000000, 0x02080000,
	0x40080100, 0x00080000, 0x02000100, 0x40080100,
	0x42000100, 0x42080000, 0x00080100, 0x40000000,
	0x02000000, 0x40080000, 0x40080000, 0x00000000,
	0x40000100, 0x42080100, 0x42080100, 0x02000100,
	0x42080000, 0x40000100, 0x00000000, 0x42000000,
	0x02080100, 0x02000000, 0x42000000, 0x00080100,
	0x00080000, 0x42000100, 0x00000100, 0x02000000,
	0x40000000, 0x02080000, 0x42000100, 0x40080100,
	0x02000100, 0x40000000, 0x42080000, 0x02080100,
	0x40080100, 0x00000100, 0x02000000, 0x42080000,
	0x42080100, 0x00080100, 0x42000000, 0x42080100,
	0x02080000, 0x00000000, 0x40080000, 0x42000000,
	0x00080100, 0x02000100, 0x40000100, 0x00080000,
	0x00000000, 0x40080000, 0x02080100, 0x40000100
};

static const unsigned long SB6[64] =
{
	0x20000010, 0x20400000, 0x00004000, 0x20404010,
	0x20400000, 0x00000010, 0x20404010, 0x00400000,
	0x20004000, 0x00404010, 0x00400000, 0x20000010,
	0x00400010, 0x20004000, 0x20000000, 0x00004010,
	0x00000000, 0x00400010, 0x20004010, 0x00004000,
	0x00404000, 0x20004010, 0x00000010, 0x20400010,
	0x20400010, 0x00000000, 0x00404010, 0x20404000,
	0x00004010, 0x00404000, 0x20404000, 0x20000000,
	0x20004000, 0x00000010, 0x20400010, 0x00404000,
	0x20404010, 0x00400000, 0x00004010, 0x20000010,
	0x00400000, 0x20004000, 0x20000000, 0x00004010,
	0x20000010, 0x20404010, 0x00404000, 0x20400000,
	0x00404010, 0x20404000, 0x00000000, 0x20400010,
	0x00000010, 0x00004000, 0x20400000, 0x00404010,
	0x00004000, 0x00400010, 0x20004010, 0x00000000,
	0x20404000, 0x20000000, 0x00400010, 0x20004010
};

static const unsigned long SB7[64] =
{
	0x00200000, 0x04200002, 0x04000802, 0x00000000,
	0x00000800, 0x04000802, 0x00200802, 0x04200800,
	0x04200802, 0x00200000, 0x00000000, 0x04000002,
	0x00000002, 0x04000000, 0x04200002, 0x00000802,
	0x04000800, 0x00200802, 0x00200002, 0x04000800,
	0x04000002, 0x04200000, 0x04200800, 0x00200002,
	0x04200000, 0x00000800, 0x00000802, 0x04200802,
	0x00200800, 0x00000002, 0x04000000, 0x00200800,
	0x04000000, 0x00200800, 0x00200000, 0x04000802,
	0x04000802, 0x04200002, 0x04200002, 0x00000002,
	0x00200002, 0x04000000, 0x04000800, 0x00200000,
	0x04200800, 0x00000802, 0x00200802, 0x04200800,
	0x00000802, 0x04000002, 0x04200802, 0x04200000,
	0x00200800, 0x00000000, 0x00000002, 0x04200802,
	0x00000000, 0x00200802, 0x04200000, 0x00000800,
	0x04000002, 0x04000800, 0x00000800, 0x00200002
};

static const unsigned long SB8[64] =
{
	0x10001040, 0x00001000, 0x00040000, 0x10041040,
	0x10000000, 0x10001040, 0x00000040, 0x10000000,
	0x00040040, 0x10040000, 0x10041040, 0x00041000,
	0x10041000, 0x00041040, 0x00001000, 0x00000040,
	0x10040000, 0x10000040, 0x10001000, 0x00001040,
	0x00041000, 0x00040040, 0x10040040, 0x10041000,
	0x00001040, 0x00000000, 0x00000000, 0x10040040,
	0x10000040, 0x10001000, 0x00041040, 0x00040000,
	0x00041040, 0x00040000, 0x10041000, 0x00001000,
	0x00000040, 0x10040040, 0x00001000, 0x00041040,
	0x10001000, 0x00000040, 0x10000040, 0x10040000,
	0x10040040, 0x10000000, 0x00040000, 0x10001040,
	0x00000000, 0x10041040, 0x00040040, 0x10000040,
	0x10040000, 0x10001000, 0x10001040, 0x00000000,
	0x10041040, 0x00041000, 0x00041000, 0x00001040,
	0x00001040, 0x00040040, 0x10000000, 0x10041000
};

//PC1: left and right halves bit-swap
static const unsigned long LHs[16] =
{
	0x00000000, 0x00000001, 0x00000100, 0x00000101,
	0x00010000, 0x00010001, 0x00010100, 0x00010101,
	0x01000000, 0x01000001, 0x01000100, 0x01000101,
	0x01010000, 0x01010001, 0x01010100, 0x01010101
};

static const unsigned long RHs[16] =
{
	0x00000000, 0x01000000, 0x00010000, 0x01010000,
	0x00000100, 0x01000100, 0x00010100, 0x01010100,
	0x00000001, 0x01000001, 0x00010001, 0x01010001,
	0x00000101, 0x01000101, 0x00010101, 0x01010101,
};

static const unsigned char odd_parity_table[128] = { 1,  2,  4,  7,  8,
11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32, 35, 37, 38, 41, 42, 44,
47, 49, 50, 52, 55, 56, 59, 61, 62, 64, 67, 69, 70, 73, 74, 76, 79, 81,
82, 84, 87, 88, 91, 93, 94, 97, 98, 100, 103, 104, 107, 109, 110, 112,
115, 117, 118, 121, 122, 124, 127, 128, 131, 133, 134, 137, 138, 140,
143, 145, 146, 148, 151, 152, 155, 157, 158, 161, 162, 164, 167, 168,
171, 173, 174, 176, 179, 181, 182, 185, 186, 188, 191, 193, 194, 196,
199, 200, 203, 205, 206, 208, 211, 213, 214, 217, 218, 220, 223, 224,
227, 229, 230, 233, 234, 236, 239, 241, 242, 244, 247, 248, 251, 253,
254 
};

#define WEAK_KEY_COUNT 16

static const unsigned char weak_key_table[WEAK_KEY_COUNT][DES_KEY_SIZE] =
{
	{ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 },
	{ 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE },
	{ 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E },
	{ 0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1 },

	{ 0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E },
	{ 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01 },
	{ 0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1 },
	{ 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01 },
	{ 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE },
	{ 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01 },
	{ 0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1 },
	{ 0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E },
	{ 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE },
	{ 0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E },
	{ 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE },
	{ 0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1 }
};

// Initial Permutation macro
#define DES_IP(X,Y)                                             \
{                                                               \
	T = ((X >>  4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T <<  4);   \
	T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);   \
	T = ((Y >>  2) ^ X) & 0x33333333; X ^= T; Y ^= (T <<  2);   \
	T = ((Y >>  8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T <<  8);   \
	Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF;                    \
	T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T;                   \
	X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF;                    \
}

// Final Permutation macro
#define DES_FP(X,Y)                                             \
{                                                               \
	X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF;                    \
	T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T;                   \
	Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF;                    \
	T = ((Y >>  8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T <<  8);   \
	T = ((Y >>  2) ^ X) & 0x33333333; X ^= T; Y ^= (T <<  2);   \
	T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16);   \
	T = ((X >>  4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T <<  4);   \
}

// DES round macro
#define DES_ROUND(X,Y)                          \
{                                               \
	T = *SK++ ^ X;                              \
	Y ^= SB8[ (T) & 0x3F ] ^              		\
	SB6[ (T >>  8) & 0x3F ] ^              \
	SB4[ (T >> 16) & 0x3F ] ^              \
	SB2[ (T >> 24) & 0x3F ];               \
	\
	T = *SK++ ^ ((X << 28) | (X >> 4));         \
	Y ^= SB7[ (T) & 0x3F ] ^              		\
	SB5[ (T >>  8) & 0x3F ] ^              \
	SB3[ (T >> 16) & 0x3F ] ^              \
	SB1[ (T >> 24) & 0x3F ];               \
}

#define SWAP(a,b) { unsigned long t = a; a = b; b = t; t = 0; }

void des_key_set_parity( unsigned char key[DES_KEY_SIZE] )
{
	for(int i = 0; i < DES_KEY_SIZE; i++ )
		key[i] = odd_parity_table[key[i] / 2];
}

int des_key_check_key_parity( const unsigned char key[DES_KEY_SIZE] )
{
	for(int i = 0; i < DES_KEY_SIZE; i++ )
		if( key[i] != odd_parity_table[key[i] / 2] )
			return( 1 );

	return( 0 );
}

int des_key_check_weak( const unsigned char key[DES_KEY_SIZE] )
{
	for(int i = 0; i < WEAK_KEY_COUNT; i++ )
		if( memcmp( weak_key_table[i], key, DES_KEY_SIZE) == 0 )
			return( 1 );

	return( 0 );
}

unsigned __int64 des_enc_len(const unsigned __int64& nlen)
{
	unsigned __int64 npaddinglen = nlen;
	int npad = nlen&7;//nFileLen & 7 <=> nFileLen%8
	if ( npad != 0 )
	{
		npaddinglen += 8 - npad;
	}
	return npaddinglen;
}

unsigned __int64 des_dec_len(const unsigned char* input, unsigned __int64 nlen)
{
	while( input[--nlen] == 0x00 );
	return ++nlen;
}

/************************************************************************/
/*  函数：des_setkey[6/5/2016 IT];
/*  描述：;
/*  参数：;
/*  	[IN] ：;
/*  	[OUT] ：;
/*  	[IN/OUT] ：;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
static void des_setkey( unsigned long SK[32], const unsigned char key[8] )
{
	int i;
	unsigned long X, Y, T;

	GET_ULONG_BE( X, key, 0 );
	GET_ULONG_BE( Y, key, 4 );

	// Permuted Choice 1
	T =  ((Y >>  4) ^ X) & 0x0F0F0F0F;  X ^= T; Y ^= (T <<  4);
	T =  ((Y      ) ^ X) & 0x10101010;  X ^= T; Y ^= (T      );

	X =   (LHs[ (X      ) & 0xF] << 3) | (LHs[ (X >>  8) & 0xF ] << 2)
		| (LHs[ (X >> 16) & 0xF] << 1) | (LHs[ (X >> 24) & 0xF ]     )
		| (LHs[ (X >>  5) & 0xF] << 7) | (LHs[ (X >> 13) & 0xF ] << 6)
		| (LHs[ (X >> 21) & 0xF] << 5) | (LHs[ (X >> 29) & 0xF ] << 4);

	Y =   (RHs[ (Y >>  1) & 0xF] << 3) | (RHs[ (Y >>  9) & 0xF ] << 2)
		| (RHs[ (Y >> 17) & 0xF] << 1) | (RHs[ (Y >> 25) & 0xF ]     )
		| (RHs[ (Y >>  4) & 0xF] << 7) | (RHs[ (Y >> 12) & 0xF ] << 6)
		| (RHs[ (Y >> 20) & 0xF] << 5) | (RHs[ (Y >> 28) & 0xF ] << 4);

	X &= 0x0FFFFFFF;
	Y &= 0x0FFFFFFF;

	// calculate subkeys
	for( i = 0; i < 16; i++ )
	{
		if( i < 2 || i == 8 || i == 15 )
		{
			X = ((X <<  1) | (X >> 27)) & 0x0FFFFFFF;
			Y = ((Y <<  1) | (Y >> 27)) & 0x0FFFFFFF;
		}
		else
		{
			X = ((X <<  2) | (X >> 26)) & 0x0FFFFFFF;
			Y = ((Y <<  2) | (Y >> 26)) & 0x0FFFFFFF;
		}

		*SK++ =   ((X <<  4) & 0x24000000) | ((X << 28) & 0x10000000)
			| ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000)
			| ((X <<  6) & 0x01000000) | ((X <<  9) & 0x00200000)
			| ((X >>  1) & 0x00100000) | ((X << 10) & 0x00040000)
			| ((X <<  2) & 0x00020000) | ((X >> 10) & 0x00010000)
			| ((Y >> 13) & 0x00002000) | ((Y >>  4) & 0x00001000)
			| ((Y <<  6) & 0x00000800) | ((Y >>  1) & 0x00000400)
			| ((Y >> 14) & 0x00000200) | ((Y      ) & 0x00000100)
			| ((Y >>  5) & 0x00000020) | ((Y >> 10) & 0x00000010)
			| ((Y >>  3) & 0x00000008) | ((Y >> 18) & 0x00000004)
			| ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001);

		*SK++ =   ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000)
			| ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000)
			| ((X >>  2) & 0x02000000) | ((X <<  1) & 0x01000000)
			| ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000)
			| ((X <<  3) & 0x00080000) | ((X >>  6) & 0x00040000)
			| ((X << 15) & 0x00020000) | ((X >>  4) & 0x00010000)
			| ((Y >>  2) & 0x00002000) | ((Y <<  8) & 0x00001000)
			| ((Y >> 14) & 0x00000808) | ((Y >>  9) & 0x00000400)
			| ((Y      ) & 0x00000200) | ((Y <<  7) & 0x00000100)
			| ((Y >>  7) & 0x00000020) | ((Y >>  3) & 0x00000011)
			| ((Y <<  2) & 0x00000004) | ((Y >> 21) & 0x00000002);
	}
}

/************************************************************************/
/*  函数：des_setkey_enc[6/5/2016 IT];
/*  描述：设置DES加密密钥(56bit,加密);
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：8字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des_setkey_enc( IN des_context *ctx, IN const unsigned char key[8] )
{
	des_setkey( ctx->sk, key );
}

/************************************************************************/
/*  函数：des_setkey_dec[6/5/2016 IT];
/*  描述：设置DES解密密钥(56bit,解密);;
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：8字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des_setkey_dec( IN des_context *ctx, IN const unsigned char key[8] )
{
	int i;

	des_setkey( ctx->sk, key );

	for( i = 0; i < 16; i += 2 )
	{
		SWAP( ctx->sk[i], ctx->sk[30 - i] );
		SWAP( ctx->sk[i + 1], ctx->sk[31 - i] );
	}
}

/************************************************************************/
/*  函数：[6/5/2016 IT];
/*  描述：DES-ECB模式下加解密;
/*  参数：;
/*  	[IN] ctx：已经初始化过的DES结构体;
/*  	[IN] input：64bit的输入缓存块;
/*  	[OUT] output：64bit的输出缓存块;
/*  返回：成功返回0;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
int des_crypt_ecb( IN des_context *ctx, IN const unsigned char input[8], OUT unsigned char output[8] )
{
	int i;
	unsigned long X, Y, T, *SK;

	SK = ctx->sk;

	GET_ULONG_BE( X, input, 0 );
	GET_ULONG_BE( Y, input, 4 );

	DES_IP( X, Y );

	for( i = 0; i < 8; i++ )
	{
		DES_ROUND( Y, X );
		DES_ROUND( X, Y );
	}

	DES_FP( Y, X );

	PUT_ULONG_BE( Y, output, 0 );
	PUT_ULONG_BE( X, output, 4 );

	return( 0 );
}


/************************************************************************/
/*  函数：des_crypt_cbc[6/5/2016 IT];
/*  描述：DES-CBC模式加解密;
/*  参数：;
/*  	[IN] ctx：已经初始化过的DES结构体;
/*  	[IN] mode：加密或解密模式;
/*  	[IN] length：input长度;
/*  	[IN] iv：初始向量（使用后更新）;
/*  	[IN] input：要加密或解密的数据;
/*  	[OUT] output：加密或解密的数据;
/*  返回：成功返回0;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
int des_crypt_cbc( IN des_context *ctx, IN int mode, IN int length, IN unsigned char iv[8], IN const unsigned char *input, OUT unsigned char *output )
{
	int i;
	unsigned char temp[8];

	if( length % 8 )
		return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH );

	if( mode == DES_ENCRYPT )
	{
		while( length > 0 )
		{
			for( i = 0; i < 8; i++ )
				output[i] = (unsigned char)( input[i] ^ iv[i] );

			des_crypt_ecb( ctx, output, output );
			memcpy( iv, output, 8 );

			input  += 8;
			output += 8;
			length -= 8;
		}
	}
	else /* DES_DECRYPT */
	{
		while( length > 0 )
		{
			memcpy( temp, input, 8 );
			des_crypt_ecb( ctx, input, output );

			for( i = 0; i < 8; i++ )
				output[i] = (unsigned char)( output[i] ^ iv[i] );

			memcpy( iv, temp, 8 );

			input  += 8;
			output += 8;
			length -= 8;
		}
	}

	return( 0 );
}

/************************************************************************/
/*  函数：des_crypt_cbc[6/5/2016 IT];
/*  描述：DES-CBC模式加解密;
/*  参数：;
/*  	[IN] ctx：已经初始化过的DES结构体;
/*  	[IN] mode：加密或解密模式;
/*  	[IN] length：input长度;
/*  	[IN] iv：初始向量（使用后更新）;
/*  	[IN] input：要加密或解密的数据;
/*  	[OUT] output：加密或解密的数据;
/*  返回：成功返回0;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
int des_crypt_cbc(IN int mode, IN int length, IN const unsigned char *input, OUT unsigned char *output, IN const int& outMaxlen )
{
	if ( length == 0 )
		return -1;

	int i;
	des_context ctx;
	if ( mode == DES_ENCRYPT )
		des_setkey_enc(&ctx, deskey);
	else
		des_setkey_dec(&ctx, deskey);

	int nInputlen = length;
	unsigned char *result = output;
	unsigned char iv[9] = "WorkbyIT";
	unsigned char temp[8];

	int npadlen = length & 7;
	if( npadlen != 0 )
	{
		length += 8 - npadlen;
		nInputlen = length;
	}

	if( mode == DES_ENCRYPT )
	{
		while( length > 0 )
		{
			for( i = 0; i < 8; i++ )
			{
				if ( length == 8 && npadlen != 0)
				{
					if ( i >= npadlen )
						output[i] = (unsigned char)( 0x00 ^ iv[i] );
					else
						output[i] = (unsigned char)( input[i] ^ iv[i] );
				}
				else
					output[i] = (unsigned char)( input[i] ^ iv[i] );
			}

			des_crypt_ecb( &ctx, output, output );
			memcpy( iv, output, 8 );

			input  += 8;
			output += 8;
			length -= 8;
		}

		// 将加密结果转换成base64;
		// 1.计算出Base64的长度,CalcBase64Len的参数必须是字节长度,而非字符数;
		INT nBaseLen = CBase64::CalcBase64Len(nInputlen);
		if ( nBaseLen > outMaxlen )
			return -1;

		// 2.创建Base64缓存;
		CHAR *pBase64 = new CHAR[nBaseLen + 1];
		memset(pBase64, 0, nBaseLen + 1);

		// 3.转化出Base64字符;
		CBase64::binToBase64(result, nInputlen, pBase64);
		memset(result, 0, outMaxlen);
		memcpy(result, pBase64, nBaseLen);

		if ( pBase64 )
			delete []pBase64;
	}
	else /* DES_DECRYPT */
	{
		// 将base64转换成密文状态;
		// 1.计算出字节长度;
		INT nByteLen = CBase64::CalcBinLen(length);

		// 2.创建Byte缓存区;
		BYTE *pBytes = new BYTE[nByteLen];
		memset(pBytes, 0, nByteLen);

		// 3.转化成字节;
		length = CBase64::base64ToBin((char*)input, pBytes, nByteLen);
		result = pBytes;
		while ( pBytes[length-1] == 0x00 )
			--length;

		while( length > 0 )
		{
			memcpy( temp, pBytes, 8 );
			des_crypt_ecb( &ctx, pBytes, output );

			for( i = 0; i < 8; i++ )
				output[i] = (unsigned char)( output[i] ^ iv[i] );

			memcpy( iv, temp, 8 );

			pBytes += 8;
			output += 8;
			length -= 8;
		}

		if ( result )
			delete []result;
	}

	return( 0 );
}

int des_crypt(IN CString strInput, IN CString& strOutput, IN const int &mode /* = DES_ENCRYPT */)
{
	if ( strInput.IsEmpty() )
		return -1;

	unsigned char* pInput = NULL;
	int nInputlen = strInput.GetLength();

#ifdef UNICODE
	pInput = (unsigned char*)EncodingConverion::UNICODE2ASCII(strInput.GetBuffer());
	nInputlen = strlen((char*)pInput);
#else
	pInput = new unsigned char[nInputlen+1];
	memset(pInput, 0, nInputlen+1);
	memcpy(pInput, strInput, nInputlen);
#endif

	int nOutputlen = nInputlen;
	if ( mode == DES_ENCRYPT )
	{
		// 计算密文长度,不足8位补齐;
		nOutputlen = des_enc_len(nInputlen);
		// 计算密文转成base64的长度,用于创建输出缓存;
		nOutputlen = CBase64::CalcBase64Len(nOutputlen);
	}
	else
	{
		nOutputlen = CBase64::CalcBinLen(nInputlen);
	}

	unsigned char* pOutput = new unsigned char[nOutputlen+1];
	memset(pOutput, 0, nOutputlen + 1);

	if ( des_crypt_cbc(mode, nInputlen, pInput, pOutput, nOutputlen) == -1)
		return -1;

#ifdef UNICODE
	WCHAR* pWide = EncodingConverion::ASCII2UNICODE((char*)pOutput);
	strOutput.Format(_T("%s"), pWide);
	if ( pWide )
		delete []pWide;
#else
	strOutput.Format(_T("%s"), pOutput);
#endif

	if ( pInput )
		delete []pInput;
	if ( pOutput )
		delete []pOutput;

	return 0;
}

/************************************************************************/
/*  函数：[12/21/2016 IT];
/*  描述：;
/*  参数：;
/*  	[IN] ：;
/*  	[OUT] ：;
/*  	[IN/OUT] ：;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void DES_EncryptFile(IN LPCTSTR lpFile, IN LPBYTE lpKey, IN LPBYTE lpVI, IN LPCTSTR lpEncryFile)
{
	if ( lpFile == NULL )
		return;

	if ( lpKey == NULL || lpVI == NULL )
		return;

	BYTE szKey[9] = {0};
	INT nKeyLen = strlen((char*)lpKey);
	if (nKeyLen != 8 )
		return;

	memcpy(szKey, lpKey, 8);

	BYTE szvi[9] = {0};
	INT nVILen = strlen((char*)lpVI);
	if ( nVILen != 8 ) 
		return;

	memcpy(szvi, lpVI, 8);

	CFile cf;
	BYTE *pFileData = NULL;
	BYTE *pOutData = NULL;
	INT nPadLen = 0;
	UINT64 nFileLen = 0;
	UINT64 nOutLen = 0;
	if ( cf.Open(lpFile, CFile::modeRead) )
	{
		nFileLen = cf.GetLength();
		pFileData = new BYTE[nFileLen];
		memset(pFileData, 0, nFileLen);

		cf.Read(pFileData,nFileLen);
		cf.Close();
	}
	else
	{
		DWORD dwError = GetLastError();
		TRACE("%d", dwError);
		return;
	}

	if ( strncmp((char*)pFileData, "<?>", 3) == 0 )
	{// 已加密的,退出;
		delete []pFileData;
		return;
	}

	// 不足8的倍数,补齐;
	nOutLen = des_enc_len(nFileLen);
	pOutData = new BYTE[nOutLen + 1 ];
	memset(pOutData, 0, nOutLen + 1 );

	des_context des;
	if ( des_key_check_key_parity(szKey) == 1)
	{
		des_key_set_parity(szKey);
		if ( des_key_check_key_parity(szKey) == 0 )
		{
			des_setkey_enc(&des, szKey);
		}
	}
	else
		des_setkey_enc(&des, szKey);

	des_crypt_cbc(&des, DES_ENCRYPT, nOutLen, szvi, pFileData, pOutData);

	CFile cfo;
	if ( cfo.Open(lpEncryFile, CFile::modeCreate|CFile::modeWrite) )
	{
		cfo.Write("<?>", 3);
		cfo.Write(&nFileLen, sizeof(UINT64));
		cfo.Write(pOutData, nOutLen);
		cfo.Close();
	}

	if ( pOutData )
		delete []pOutData;

	if ( pFileData)
		delete []pFileData;
}

/************************************************************************/
/*  函数：[12/21/2016 IT];
/*  描述：;
/*  参数：;
/*  	[IN] ：;
/*  	[OUT] ：;
/*  	[IN/OUT] ：;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void DES_DecryptFile(IN LPCTSTR lpFile, IN LPBYTE lpKey, IN LPBYTE lpVI, IN LPCTSTR lpDecryFile)
{
	if ( lpFile == NULL )
		return;

	if ( lpKey == NULL || lpVI == NULL )
		return;

	INT nKeyLen = strlen((char*)lpKey);
	if (nKeyLen != 8 )
		return;

	BYTE szvi[9] = {0};
	INT nVILen = strlen((char*)lpVI);
	if ( nVILen != 8 ) 
		return;

	memcpy(szvi, lpVI, 8);

	CFile cf;
	BYTE *pFileData = NULL;
	BYTE *pOutData = NULL;
	UINT64 nFileLen = 0;
	if ( cf.Open(lpFile, CFile::modeRead) )
	{
		nFileLen = cf.GetLength();
		pFileData = new BYTE[nFileLen];
		memset(pFileData, 0, nFileLen);

		cf.Read(pFileData,nFileLen);
		cf.Close();
	}
	else
	{
		DWORD dwError = GetLastError();
		TRACE("%d", dwError);
		return;
	}

	if ( strncmp((char*)pFileData, "<?>", 3) != 0 )
	{// 不是加密文件;
		delete []pFileData;
		return;
	}

	// 加密的长度,必定是8的倍数;
	UINT64 nOutLen = nFileLen-3-sizeof(UINT64);
	pOutData = new BYTE[nOutLen + 1];
	memset(pOutData, 0, nOutLen + 1);

	des_context des;
	if ( des_key_check_key_parity(lpKey) == 1)
	{
		des_key_set_parity(lpKey);
		if ( des_key_check_key_parity(lpKey) == 0 )
		{
			des_setkey_dec(&des, lpKey);
		}
	}
	else
		des_setkey_dec(&des, lpKey);
	des_crypt_cbc(&des, DES_DECRYPT, nOutLen, szvi, pFileData+3+sizeof(UINT64), pOutData);

	CFile cfo;
	memcpy(&nOutLen, pFileData+3, sizeof(UINT64)); // 获取实际文件长度;
	if ( cfo.Open(lpDecryFile, CFile::modeCreate|CFile::modeWrite) )
	{
		cfo.Write(pOutData, nOutLen);
		cfo.Close();
	}

	if ( pOutData )
		delete []pOutData;

	if (pFileData)
		delete []pFileData;
}