sms4.c

sms4 加密

//对SMS4算法进行研究,并写了一个算法的实现,能够进行SMS4加密.供有兴趣者参考.

/*
*This program is about the sms4 algorithm.
*Author:Super Peng
*Email:[e-mail]
*Date:2006-3-31
*Addr:Institute of plasma physics of Chinese academy of science
*
*Note: This program is just for self-interest of Encryption technology not for commercial fields.
*Any question can be sent to my email.
*/
#include

/*S-Box Table*/
unsigned char SBOX[16][16] =
{{0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05},
{0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99},
{0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62},
{0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6},
{0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8},
{0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35},
{0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87},
{0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e},
{0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1},
{0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3},
{0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f},
{0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51},
{0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8},
{0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0},
{0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84},
{0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48}};

/*System constant value table*/
unsigned int FK[4] = {0xa3b1bac6,0x56aa3350,0x677d9197,0xb27022dc};

/*Constant value table*/
unsigned int CK[32] =
{0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
0x10171e25,0x2c333a41,0x484f565d,0x646b7279};

/*Text*/
unsigned char chNumber[16] =
{0x01,0x23,0x45,0x67,
0x89,0xab,0xcd,0xef,
0xfe,0xdc,0xba,0x98,
0x76,0x54,0x32,0x10};

/*Encryption key*/
int MK[4]={0x01234567,0x89abcdef,0xfedcba98,0x76543210};

/*
*Left shift iBits of the integer.
*/
int RotaryLeftShift(unsigned int uiNumber, int iBits)
{
int i;
int iResult;
iResult = 0;

for(i = 0; i 0; i--)
{
chNumbers[i-1] =(unsigned char)(iMask & iA);
iA >>= 8;
}
return chNumbers;
}

/*
*Get the S-Box value by checking up the constant table.
*/
unsigned int SBoxChar(unsigned char A[])
{
unsigned char chHighMask = 0xf0;
unsigned char chLowMask = 0x0f;

unsigned int iResult;
iResult = 0;

int i;
int iX,iY;
for(i = 0; i >= 4;
iY = A[i] & chLowMask;
iResult >= 8;
}

// for(i = 0; i 31; i--)
{
printf("%08X",i,iXA[i]);
}
for(i = 1; i 31; i--)
{
printf("%08X",i,iXA[i]);
}
return 0;
}