aes.cpp
来自「AES算法软件的实现」· C++ 代码 · 共 793 行 · 第 1/2 页
CPP
793 行
//
// return cErrCode;
//}
//-----------------------------------------------------------------------------
//功能：加密轮函数
//
//输入：
// pSBox 加密S盒数据
// pState 当前的明文变换状态
// pRoundKey 本轮用到的轮密钥
//输出：
// pState 当前的明文变换状态
//返回：
// 正常 0
// 不正常 非0
void Round( unsigned char *pSBox,
unsigned char *pState,
unsigned char *pRoundKey)
{
SubBytes(pSBox, pState, 16);
ShiftRows(pState);
MixColumn(pState);
AddRoundKey(pState, pRoundKey);
}
//-----------------------------------------------------------------------------
//功能：解密轮函数
//
//输入：
// pSBox 解密S盒数据
// pState 当前的明文变换状态
// pRoundKey 本轮用到的轮密钥
//输出：
// pState 当前的明文变换状态
//返回：
// 正常 0
// 不正常 非0
void InvRound( unsigned char *pSBox,
unsigned char *pState,
unsigned char *pRoundKey)
{
AddRoundKey(pState, pRoundKey);
InvMixColumn(pState);
InvShiftRows(pState);
InvSubBytes(pSBox, pState, 16);
}
//-----------------------------------------------------------------------------
//功能：最后一轮的加密轮函数
//
//输入：
// pSBox 加密S盒数据
// pState 当前的明文变换状态
// pRoundKey 本轮用到的轮密钥
//输出：
// pState 明文加密结果
//返回：
// 正常 0
// 不正常 非0
void FinalRound(unsigned char *pSBox,
unsigned char *pState,
unsigned char *pRoundKey)
{
SubBytes(pSBox, pState, 16);
ShiftRows(pState);
AddRoundKey(pState, pRoundKey);
}
//-----------------------------------------------------------------------------
//功能：最后一轮的解密轮函数
//
//输入：
// pSBox 解密S盒数据
// pState 当前的明文变换状态
// pRoundKey 本轮用到的轮密钥
//输出：
// pState 密文解密结果
//返回：
// 正常 0
// 不正常 非0
void InvFinalRound( unsigned char *pSBox,
unsigned char *pState,
unsigned char *pRoundKey)
{
AddRoundKey(pState, pRoundKey);
InvShiftRows(pState);
InvSubBytes(pSBox, pState, 16);
}
//-----------------------------------------------------------------------------
//功能：AES加密函数
//
//输入：
// pIn 明文
// pCipherKey 密钥
// keySize 密钥字节长度
//输出：
// pState 密文
//返回：
// 正常 0
// 不正常 非0
char AES_Encrypt( unsigned char *pOut,
unsigned char *pIn,
unsigned char *pCipherKey,
unsigned char keySize)
{
char cErrCode=0;
unsigned char SBox[256] = {
0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,
0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,
0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,
0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,
0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,
0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,
0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,
0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,
0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,
0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,
0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,
0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,
0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,
0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,
0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,
0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16
};
unsigned char state[16];
unsigned char aRoundKey[240];
unsigned char cNr=0;
unsigned char i;
memcpy (state, pIn, 16);
switch (keySize)
{
case 16:
cNr = 10;
break;
case 24:
cNr = 12;
break;
case 32:
cNr = 14;
break;
default:
break;
}
KeyExpansion(aRoundKey, SBox, pCipherKey, keySize);
AddRoundKey(state, aRoundKey);
for(i=1; i<cNr; i++)
{
Round(SBox, state, aRoundKey + 16*i);
}
FinalRound(SBox, state, aRoundKey + 16*i);
memcpy (pOut, state, 16);
return cErrCode;
}
//-----------------------------------------------------------------------------
//功能：AES解密函数
//
//输入：
// pIn 密文
// pCipherKey 密钥
// keySize 密钥字节长度
//输出：
// pState 明文
//返回：
// 正常 0
// 不正常 非0
char AES_Decrypt( unsigned char *pOut,
unsigned char *pIn,
unsigned char *pCipherKey,
unsigned char keySize)
{
char cErrCode=0;
unsigned char SBox_Enc[256] = {
0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,
0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,
0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,
0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,
0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,
0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,
0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,
0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,
0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,
0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,
0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,
0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,
0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,
0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,
0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,
0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16
};
unsigned char SBox_Dec[256] = {
0x52,0x09,0x6a,0xd5,0x30,0x36,0xa5,0x38,0xbf,0x40,0xa3,0x9e,0x81,0xf3,0xd7,0xfb,
0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb,
0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e,
0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25,
0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92,
0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84,
0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06,
0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b,
0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73,
0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e,
0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b,
0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4,
0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f,
0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef,
0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61,
0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d
};
unsigned char state[240];
unsigned char aRoundKey[240];
unsigned char cNr=0;
unsigned char i;
memcpy (state, pIn, 16);
switch (keySize)
{
case 16:
cNr = 10;
break;
case 24:
cNr = 12;
break;
case 32:
cNr = 14;
break;
default:
break;
}
KeyExpansion(aRoundKey, SBox_Enc, pCipherKey, keySize);
InvFinalRound(SBox_Dec, state, aRoundKey + 16*cNr);
for(i=cNr-1; i>=1; i--)
{
InvRound(SBox_Dec, state, aRoundKey + 16*i);
}
AddRoundKey(state, aRoundKey);
memcpy (pOut, state, 16);
return cErrCode;
}
//------------------------------------------------------------------------------
/*void outputResult( unsigned char* data2out )
{
int i;
printf( "\n" );
for( i=0; i<16; i++ )
{
printf( "0x%02x ", data2out[i] );
}
}
//------------------------------------------------------------------------------
int main(int argc, char* argv[])
{
FILE *fpIn, *fpOut;
char strFileName[80];
int strFileNameLen;
char ch;
unsigned char inputData[16];
unsigned char outputData[16];
unsigned char initKey[16];
int keySize;
int i;
//------------------------------------------------------
//0. 根据程序参数初始化变量
strFileNameLen = strlen(argv[1]);
memcpy( strFileName, argv[1], strFileNameLen+1 );
fpIn = fopen( strFileName, "rb" );
if( fpIn == NULL )
{
printf( "\ncan't open file:%s", strFileName );
getch();
exit(1);
}
if( memcmp(argv[3], "-enc", 4) == 0 )
{
fpOut = fopen( "ciphertext.txt", "wb" );
}
else if( memcmp(argv[3], "-dec", 4) == 0 )
{
fpOut = fopen( "plaintext.txt", "wb" );
}
else
{
printf( "\nerror work mode!" );
getch();
exit(1);
}
if( fpOut == NULL )
{
printf( "\ncan't open output file" );
getch();
exit(1);
}
sscanf (argv[2], "-%d", &keySize);
//------------------------------------------------------
//1. 读取明/密文和密钥
for( i=0; i<16; i++ )
{
fscanf( fpIn, "0x%x,", &initKey[i] );
}
printf( "\ninitKey:" );
outputResult( initKey );
ch = fgetc( fpIn );
ch = fgetc( fpIn );
while (!feof(fpIn))
{
for( i=0; i<16; i++ )
{
fscanf( fpIn, "0x%x,", &inputData[i] );
}
ch = fgetc( fpIn );
ch = fgetc( fpIn );
//------------------------------------------------------
//2. 密码算法计算
if( memcmp(argv[3], "-enc", 4) == 0 )
{
AES_Encrypt (outputData, inputData, initKey, keySize);
}
else if( memcmp(argv[3], "-dec", 4) == 0 )
{
AES_Decrypt (outputData, inputData, initKey, keySize);
}
else
{
printf( "\nerror work mode!" );
getch();
exit(1);
}
//------------------------------------------------------
//3. 输出计算结果
printf( "\ninputData:" );
outputResult( inputData );
if( memcmp(argv[2], "-enc", 4) == 0 )
{
printf( "\nencrypt result:" );
}
else
{
printf( "\ndecrypt result:" );
}
outputResult( outputData );
fprintf (fpOut, "\r\n");
for (i=0; i<16; i++)
{
fprintf (fpOut, "0x%02x,", outputData[i]);
}
}
fclose( fpIn );
fclose( fpOut );
printf( "\n\npress any key to exit." );
getch();
return 0;
}
*/
AES::AES()
{
}
AES::~AES()
{
}
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