AES加密算法
编程环境:VS2019
编程语言:c++
结果展示:
#include <iostream>
#include <string.h>
using namespace std;
//明文分组长度选择128
#define N_plaintext 128
//明文4列
#define Nb 4
//密钥长度选择128
#define N_key 128
//密钥4列
#define Nk 4
//生成状态(字节)
void ProduceState(char* plaintext, unsigned char state[4][4]);
//字节代换
void ByteSub(unsigned char state[4][4]);
//行移位
void ShiftRow(unsigned char state[4][4]);
//列混合
void MixColumn(unsigned char state[4][4]);
//列混合取模辅助函数
unsigned char helper(unsigned char c, int n);
//列混合取模辅助函数2
unsigned char helper_base(unsigned char c);
//密钥加
void AddRoundKey(unsigned char state[4][4], unsigned char roundKey[11][4][4],int n);
//轮函数
void Round(unsigned char state[4][4], unsigned char roundKey[11][4][4],int n);
//最后轮函数
void FinalRound(unsigned char state[4][4], unsigned char roundKey[11][4][4]);
//密钥扩展
void KeyExpansion(char key[], unsigned char roundKey[11][4][4]);
//辅助赋值函数
void Copy(unsigned char temp[4], unsigned char w[4][44],int n);
//密钥扩展SubByte
void SubByte_Key(unsigned char temp[4]);
//密钥扩展RotByte
void RotByte(unsigned char temp[4]);
//加密
void Rijndael(unsigned char state[4][4], char key[N_key]);
//解密
void InvRijndael(unsigned char state[4][4], char key[N_key]);
//逆字节代换
void InvByteSub(unsigned char state[4][4]);
//逆行移位
void InvShiftRow(unsigned char state[4][4]);
//逆列混合
void InvMixColumn(unsigned char state[4][4]);
//逆轮函数
void InvRound(unsigned char state[4][4], unsigned char roundKey[11][4][4], int n);
//逆最后轮函数
void InvFinalRound(unsigned char state[4][4], unsigned char roundKey[11][4][4]);
//输出状态
void Print(unsigned char state[4][4]);
//主函数
int main()
{
//一组明文
char plaintext[N_plaintext + 1];
//一组密钥
char key[N_key + 1];
//菜单
cout << "请选择:\n";
cout << "1.用默认明文和密钥\n";
cout << "2.手动输入明文和密钥\n";
int choice;
cin >> choice;
cin.clear();
cin.ignore();
if (choice == 1)
{
strcpy_s(plaintext, 129, "00110010010000111111011010101000100010000101101000110000100011010011000100110001100110001010001011100000001101110000011100110100");
strcpy_s(key,129, "00101011011111100001010100010110001010001010111011010010101001101010101111110111000101011000100000001001110011110100111100111100");
}
else
{
cout << "请输入128bit明文:\n";
cin.getline(plaintext, 129);
cout << "请输入128bit密钥:\n";
cin.getline(key, 129);
}
system("cls");
//状态
unsigned char plainState[4][Nb];
//明文生成状态
ProduceState(plaintext, plainState);
//输出明文和密钥
cout << "明文为:\n";
Print(plainState);
//加密
Rijndael(plainState, key);
cout << "\n加密后密文为:\n";
Print(plainState);
//解密
InvRijndael(plainState, key);
cout << "\n再对密文解密后明文为:\n";
Print(plainState);
system("pause");
return 0;
}
//生成状态(字节)
void ProduceState(char* plaintext, unsigned char state[4][4])
{
int temp,index=0;
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
temp = 0;
for (int k = 128; k >= 1; k /= 2)
{
temp += k * (plaintext[index++] - '0');
}
state[j][i] = (unsigned char)temp;
}
}
}
//字节代换
void ByteSub(unsigned char state[4][4])
{
//S盒
const unsigned char S_Table[16][16] =
{
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
};
//字节代换
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
{
state[i][j] = S_Table[(int)(state[i][j] >> 4)][(int)(state[i][j] & 0x0f)];
}
}
//行移位
void ShiftRow(unsigned char state[4][4])
{
//第1行
unsigned char temp=state[1][0];
for (int i = 1; i <= 3; i++)
state[1][i - 1] = state[1][i];
state[1][3] = temp;
//第2行
temp = state[2][0];
state[2][0] = state[2][2];
state[2][2] = temp;
temp = state[2][1];
state[2][1] = state[2][3];
state[2][3] = temp;
//第3行
temp = state[3][3];
for (int i = 3; i >= 1; i--)
state[3][i] = state[3][i - 1];
state[3][0] = temp;
}
//列混合
void MixColumn(unsigned char state[4][4])
{
//复制一份state
unsigned char tempcopy[4][4];
for (int i = 0; i < 16; i++)
*(*tempcopy + i) = *(*state + i);
for (int column = 0; column < 4; column++)
{
state[0][column] = helper(tempcopy[0][column], 2) ^ helper(tempcopy[1][column], 3)
^ helper(tempcopy[2][column], 1) ^ helper(tempcopy[3][column], 1);
state[1][column] = helper(tempcopy[0][column], 1) ^ helper(tempcopy[1][column], 2)
^ helper(tempcopy[2][column], 3) ^ helper(tempcopy[3][column], 1);
state[2][column] = helper(tempcopy[0][column], 1) ^ helper(tempcopy[1][column], 1)
^ helper(tempcopy[2][column], 2) ^ helper(tempcopy[3][column], 3);
state[3][column] = helper(tempcopy[0][column], 3) ^ helper(tempcopy[1][column], 1)
^ helper(tempcopy[2][column], 1) ^ helper(tempcopy[3][column], 2);
}
}
//列混合取模辅助函数
unsigned char helper(unsigned char c, int n)
{
if (n == 1)
return c;
else if (n == 2)
return helper_base(c);
else if (n == 3)
return helper_base(c) ^ c;
else if (n == 9)
return helper_base(helper_base(helper_base(c))) ^ c;
else if (n == 11)
return helper_base(helper_base(helper_base(c))) ^ helper_base(c) ^ c;
else if (n == 13)
return helper_base(helper_base(helper_base(c))) ^ helper_base(helper_base(c)) ^ c;
else //n==14
return helper_base(helper_base(helper_base(c))) ^ helper_base(helper_base(c)) ^ helper_base(c);
}
//列混合取模辅助函数2
unsigned char helper_base(unsigned char c)
{
if ((c >> 7 & 0x01) == 1)
{
return (unsigned char)((c << 1) ^ (0x1b));
}
else
return c << 1;
}
//密钥加
void AddRoundKey(unsigned char state[4][4], unsigned char roundKey[11][4][4],int n)
{
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
state[i][j] ^= roundKey[n][i][j];
}
//轮函数
void Round(unsigned char state[4][4], unsigned char roundKey[11][4][4],int n)
{
ByteSub(state);
//Print(state);
ShiftRow(state);
//Print(state);
MixColumn(state);
//Print(state);
AddRoundKey(state, roundKey,n);
//Print(state);
}
//最后轮函数
void FinalRound(unsigned char state[4][4], unsigned char roundKey[11][4][4])
{
ByteSub(state);
ShiftRow(state);
AddRoundKey(state, roundKey,10);
}
//辅助赋值函数
void Copy(unsigned char temp[4], unsigned char w[4][44],int n)
{
temp[0] = w[0][n];
temp[1] = w[1][n];
temp[2] = w[2][n];
temp[3] = w[3][n];
}
//密钥扩展SubByte
void SubByte_Key(unsigned char temp[4])
{
//S盒
const unsigned char S_Table[16][16] =
{
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
};
//字节代换
for (int i = 0; i < 4; i++)
temp[i] = S_Table[(int)(temp[i] >> 4)][(int)(temp[i] & 0x0f)];
}
//密钥扩展RotByte
void RotByte(unsigned char temp[4])
{
unsigned char ttemp = temp[0];
for (int i = 1; i <= 3; i++)
temp[i - 1] = temp[i];
temp[3] = ttemp;
}
//密钥扩展
void KeyExpansion(char key[], unsigned char roundKey[11][4][4])
{
ProduceState(key, roundKey[0]);
//用于密钥扩展 Rcon
const unsigned char Rcon[11] = { 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36 };
//辅助数组
unsigned char w[4][44];
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
w[i][j] = roundKey[0][i][j];
unsigned char temp[4];
for (int i = 4; i < 44; i++)
{
Copy(temp, w, i - 1);
if (i % Nk == 0)
{
RotByte(temp);
SubByte_Key(temp);
temp[0] ^= Rcon[i / Nk];
}
for (int j = 0; j < 4; j++)
{
w[j][i] = w[j][i - Nk] ^ temp[j];
roundKey[i / 4][j][i % 4] = w[j][i];
}
}
}
//加密
void Rijndael(unsigned char state[4][4], char key[N_key])
{
unsigned char roundkey[11][4][4];
KeyExpansion(key, roundkey);
//输出密钥
cout << "\n密钥为:\n";
Print(roundkey[0]);
AddRoundKey(state, roundkey, 0);
for (int i = 1; i < 10; i++)
Round(state, roundkey, i);
FinalRound(state, roundkey);
}
//解密
void InvRijndael(unsigned char state[4][4], char key[N_key])
{
unsigned char roundkey[11][4][4];
KeyExpansion(key, roundkey);
//逆密钥
for (int i = 1; i <= 9; i++)
InvMixColumn(roundkey[i]);
AddRoundKey(state, roundkey, 10);
for (int i = 9; i >= 1; i--)
InvRound(state, roundkey, i);
InvFinalRound(state, roundkey);
}
//输出状态
void Print(unsigned char state[4][4])
{
cout << "二进制形式:\n";
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
for (int k = 7; k >= 0; k--)
{
cout << (state[j][i] >> k & 0x01);
}
}
}
cout << "\n十六进制形式:\n";
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
printf("%#x ", state[j][i]);
}
}
cout << endl;
}
//逆字节代换
void InvByteSub(unsigned char state[4][4])
{
//逆S盒
const unsigned char ReS_Table[16][16] =
{
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
};
//逆字节代换
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
{
state[i][j] = ReS_Table[(int)(state[i][j] >> 4)][(int)(state[i][j] & 0x0f)];
}
}
//逆行移位
void InvShiftRow(unsigned char state[4][4])
{
//第1行
unsigned char temp = state[1][3];
for (int i = 3; i >= 1; i--)
state[1][i] = state[1][i - 1];
state[1][0] = temp;
//第2行
temp = state[2][0];
state[2][0] = state[2][2];
state[2][2] = temp;
temp = state[2][1];
state[2][1] = state[2][3];
state[2][3] = temp;
//第3行
temp = state[3][0];
for (int i = 1; i <= 3; i++)
state[3][i - 1] = state[3][i];
state[3][3] = temp;
}
//逆列混合
void InvMixColumn(unsigned char state[4][4])
{
//复制一份state
unsigned char tempcopy[4][4];
for (int i = 0; i < 16; i++)
*(*tempcopy + i) = *(*state + i);
for (int column = 0; column < 4; column++)
{
state[0][column] = helper(tempcopy[0][column], 14) ^ helper(tempcopy[1][column], 11)
^ helper(tempcopy[2][column], 13) ^ helper(tempcopy[3][column], 9);
state[1][column] = helper(tempcopy[0][column], 9) ^ helper(tempcopy[1][column], 14)
^ helper(tempcopy[2][column], 11) ^ helper(tempcopy[3][column], 13);
state[2][column] = helper(tempcopy[0][column], 13) ^ helper(tempcopy[1][column], 9)
^ helper(tempcopy[2][column], 14) ^ helper(tempcopy[3][column], 11);
state[3][column] = helper(tempcopy[0][column], 11) ^ helper(tempcopy[1][column], 13)
^ helper(tempcopy[2][column], 9) ^ helper(tempcopy[3][column], 14);
}
}
//逆轮函数
void InvRound(unsigned char state[4][4], unsigned char roundKey[11][4][4], int n)
{
InvByteSub(state);
InvShiftRow(state);
InvMixColumn(state);
AddRoundKey(state, roundKey, n);
}
//逆最后轮函数
void InvFinalRound(unsigned char state[4][4], unsigned char roundKey[11][4][4])
{
InvByteSub(state);
InvShiftRow(state);
AddRoundKey(state, roundKey, 0);
}