repos_util/MD5Test/des.cpp

#include "stdafx.h"
#include "des.h"
#include <string.h>

//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：;
/*  参数：;
/*  	[IN] ：;
/*  	[OUT] ：;
/*  	[IN/OUT] ：;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
static void des3_set2key( unsigned long esk[96],unsigned long dsk[96],const unsigned char key[16] )
{
	int i;

	des_setkey( esk, key );
	des_setkey( dsk + 32, key + 8 );

	for( i = 0; i < 32; i += 2 )
	{
		dsk[i] = esk[30 - i];
		dsk[i +  1] = esk[31 - i];

		esk[i + 32] = dsk[62 - i];
		esk[i + 33] = dsk[63 - i];

		esk[i + 64] = esk[i];
		esk[i + 65] = esk[i + 1];

		dsk[i + 64] = dsk[i];
		dsk[i + 65] = dsk[i + 1];
	}
}

/************************************************************************/
/*  函数：des3_set2key_enc[6/5/2016 IT];
/*  描述：设置2层DES加密密钥(112bit,加密);
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：16字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des3_set2key_enc( des3_context *ctx, const unsigned char key[16] )
{
	unsigned long sk[96];

	des3_set2key( ctx->sk, sk, key );
	memset( sk,  0, sizeof( sk ) );
}

/************************************************************************/
/*  函数：des3_set2key_dec[6/5/2016 IT];
/*  描述：设置2层DES解密密钥(112bit,解密);;
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：16字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des3_set2key_dec( des3_context *ctx, const unsigned char key[16] )
{
	unsigned long sk[96];

	des3_set2key( sk, ctx->sk, key );
	memset( sk,  0, sizeof( sk ) );
}

/************************************************************************/
/*  函数：[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 des3_set3key( unsigned long esk[96],unsigned long dsk[96],const unsigned char key[24] )
{
	int i;

	des_setkey( esk, key );
	des_setkey( dsk + 32, key +  8 );
	des_setkey( esk + 64, key + 16 );

	for( i = 0; i < 32; i += 2 )
	{
		dsk[i] 		= esk[94 - i];
		dsk[i +  1] = esk[95 - i];

		esk[i + 32] = dsk[62 - i];
		esk[i + 33] = dsk[63 - i];

		dsk[i + 64] = esk[30 - i];
		dsk[i + 65] = esk[31 - i];
	}
}

/************************************************************************/
/*  函数：des3_set3key_enc[6/5/2016 IT];
/*  描述：设置3层DES加密密钥(168bit,加密);
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：24字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des3_set3key_enc( des3_context *ctx, const unsigned char key[24] )
{
	unsigned long sk[96];

	des3_set3key( ctx->sk, sk, key );
	memset( sk, 0, sizeof( sk ) );
}

/************************************************************************/
/*  函数：des3_set2key_dec[6/5/2016 IT];
/*  描述：设置3层DES解密密钥(168bit,解密);;
/*  参数：;
/*  	[IN] ctx：要被初始化的DES结构体;
/*  	[IN] key：24字节长度的加解密密钥;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
void des3_set3key_dec( des3_context *ctx, const unsigned char key[24] )
{
	unsigned long sk[96];

	des3_set3key( sk, ctx->sk, key );
	memset( sk, 0, sizeof( sk ) );
}

/************************************************************************/
/*  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：des3_crypt_ecb[6/5/2016 IT];
/*  描述：3层DES-ECB模式加解密;
/*  参数：;
/*  	[IN] ctx：已经初始化过的DES结构体;
/*  	[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 des3_crypt_ecb( des3_context *ctx, const unsigned char input[8],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 );
	}

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

	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：des3_crypt_cbc[6/5/2016 IT];
/*  描述：3层DES-CBC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 des3_crypt_cbc( des3_context *ctx,int mode,int length,unsigned char iv[8],const unsigned char *input,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] );

			des3_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 );
			des3_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 );
}

#if defined(POLARSSL_SELF_TEST)

#include <stdio.h>

/*
* DES and 3DES test vectors from:
*
* http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip
*/
static const unsigned char des3_test_keys[24] =
{
	0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
	0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01,
	0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23
};

static const unsigned char des3_test_iv[8] =
{
	0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF,
};

static const unsigned char des3_test_buf[8] =
{
	0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74
};

static const unsigned char des3_test_ecb_dec[3][8] =
{
	{ 0xCD, 0xD6, 0x4F, 0x2F, 0x94, 0x27, 0xC1, 0x5D },
	{ 0x69, 0x96, 0xC8, 0xFA, 0x47, 0xA2, 0xAB, 0xEB },
	{ 0x83, 0x25, 0x39, 0x76, 0x44, 0x09, 0x1A, 0x0A }
};

static const unsigned char des3_test_ecb_enc[3][8] =
{
	{ 0x6A, 0x2A, 0x19, 0xF4, 0x1E, 0xCA, 0x85, 0x4B },
	{ 0x03, 0xE6, 0x9F, 0x5B, 0xFA, 0x58, 0xEB, 0x42 },
	{ 0xDD, 0x17, 0xE8, 0xB8, 0xB4, 0x37, 0xD2, 0x32 }
};

static const unsigned char des3_test_cbc_dec[3][8] =
{
	{ 0x12, 0x9F, 0x40, 0xB9, 0xD2, 0x00, 0x56, 0xB3 },
	{ 0x47, 0x0E, 0xFC, 0x9A, 0x6B, 0x8E, 0xE3, 0x93 },
	{ 0xC5, 0xCE, 0xCF, 0x63, 0xEC, 0xEC, 0x51, 0x4C }
};

static const unsigned char des3_test_cbc_enc[3][8] =
{
	{ 0x54, 0xF1, 0x5A, 0xF6, 0xEB, 0xE3, 0xA4, 0xB4 },
	{ 0x35, 0x76, 0x11, 0x56, 0x5F, 0xA1, 0x8E, 0x4D },
	{ 0xCB, 0x19, 0x1F, 0x85, 0xD1, 0xED, 0x84, 0x39 }
};

/************************************************************************/
/*  函数：des_self_test[6/5/2016 IT];
/*  描述：测试例子;
/*  参数：;
/*  	[IN] ：;
/*  	[OUT] ：;
/*  	[IN/OUT] ：;
/*  返回：void;
/*  注意：;
/*  示例：;
/*
/*  修改：;
/*  日期：;
/*  内容：;
/************************************************************************/
int des_self_test( int verbose )
{
	int i, j, u, v;
	des_context ctx;
	des3_context ctx3;
	unsigned char key[24];
	unsigned char buf[8];
	unsigned char prv[8];
	unsigned char iv[8];

	memset( key, 0, 24 );

	// ECB mode
	for( i = 0; i < 6; i++ )
	{
		u = i >> 1;
		v = i  & 1;

		if( verbose != 0 )
			printf( "  DES%c-ECB-%3d (%s): ",
			( u == 0 ) ? ' ' : '3', 56 + u * 56,
			( v == DES_DECRYPT ) ? "dec" : "enc" );

		memcpy( buf, des3_test_buf, 8 );

		switch( i )
		{
		case 0:
			des_setkey_dec( &ctx, (unsigned char *) des3_test_keys );
			break;

		case 1:
			des_setkey_enc( &ctx, (unsigned char *) des3_test_keys );
			break;

		case 2:
			des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 3:
			des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 4:
			des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 5:
			des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys );
			break;

		default:
			return( 1 );
		}

		for( j = 0; j < 10000; j++ )
		{
			if( u == 0 )
				des_crypt_ecb( &ctx, buf, buf );
			else
				des3_crypt_ecb( &ctx3, buf, buf );
		}

		if( ( v == DES_DECRYPT &&
			memcmp( buf, des3_test_ecb_dec[u], 8 ) != 0 ) ||
			( v != DES_DECRYPT &&
			memcmp( buf, des3_test_ecb_enc[u], 8 ) != 0 ) )
		{
			if( verbose != 0 )
				printf( "failed\n" );

			return( 1 );
		}

		if( verbose != 0 )
			printf( "passed\n" );
	}

	if( verbose != 0 )
		printf( "\n" );

	// CBC mode
	for( i = 0; i < 6; i++ )
	{
		u = i >> 1;
		v = i  & 1;

		if( verbose != 0 )
			printf( "  DES%c-CBC-%3d (%s): ",
			( u == 0 ) ? ' ' : '3', 56 + u * 56,
			( v == DES_DECRYPT ) ? "dec" : "enc" );

		memcpy( iv,  des3_test_iv,  8 );
		memcpy( prv, des3_test_iv,  8 );
		memcpy( buf, des3_test_buf, 8 );

		switch( i )
		{
		case 0:
			des_setkey_dec( &ctx, (unsigned char *) des3_test_keys );
			break;

		case 1:
			des_setkey_enc( &ctx, (unsigned char *) des3_test_keys );
			break;

		case 2:
			des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 3:
			des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 4:
			des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys );
			break;

		case 5:
			des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys );
			break;

		default:
			return( 1 );
		}

		if( v == DES_DECRYPT )
		{
			for( j = 0; j < 10000; j++ )
			{
				if( u == 0 )
					des_crypt_cbc( &ctx, v, 8, iv, buf, buf );
				else
					des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf );
			}
		}
		else
		{
			for( j = 0; j < 10000; j++ )
			{
				unsigned char tmp[8];

				if( u == 0 )
					des_crypt_cbc( &ctx, v, 8, iv, buf, buf );
				else
					des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf );

				memcpy( tmp, prv, 8 );
				memcpy( prv, buf, 8 );
				memcpy( buf, tmp, 8 );
			}

			memcpy( buf, prv, 8 );
		}

		if( ( v == DES_DECRYPT &&
			memcmp( buf, des3_test_cbc_dec[u], 8 ) != 0 ) ||
			( v != DES_DECRYPT &&
			memcmp( buf, des3_test_cbc_enc[u], 8 ) != 0 ) )
		{
			if( verbose != 0 )
				printf( "failed\n" );

			return( 1 );
		}

		if( verbose != 0 )
			printf( "passed\n" );
	}

	if( verbose != 0 )
		printf( "\n" );

	return( 0 );
}

#endif