用C++实现的AES加密算法,为什么加密结果是错误的,密钥扩展,列混合,移位什么的我都单独去输出查看过计算结果,都没有问题,为什么偏偏最后结果错了
代码:
AES.h
#pragma once
#include<iostream>
#include<cstring>
#include"../include/DefHead.h"
#include"../include/C_EncryCore.h"
#define GET_HIGHT(x) ((x&0xf0)>>4)
#define GET_LOW(x) ((x&0x0f))
class AES:public CEncryCore
{
public:
explicit AES();
~AES();
std::string AES_Encode
(
_In_ const unsigned char* input_data,
_In_ size_t input_len,
_In_ unsigned char* key,
_Inout_ size_t key_len,
_Inout_ int& backcode
);
std::string AES_Decode
(
_In_ const unsigned char* input_data,
_In_ size_t input_len,
_In_ unsigned char* key,
_Inout_ size_t key_len,
_Inout_ int& backcode
);
private:
//密钥扩展函数
void KeyExtend();
//GF二元运算函数
unsigned char GFMul(
_In_ unsigned char x,
_In_ unsigned char n
);
unsigned int GFMulT(
_In_ unsigned char s
);
//加密处理函数
void EncodeHandle(
_In_ int roud
);
//明文分组位移表
unsigned char P[4][4]={
{0,0,0,0},
{0,0,0,0},
{0,0,0,0},
{0,0,0,0},
};
//密钥分组位移表
unsigned char K[4][4]={
{0,0,0,0},
{0,0,0,0},
{0,0,0,0},
{0,0,0,0},
};
//列混合表
unsigned char colM[4][4]={
{2, 3, 1, 1},
{1, 2, 3, 1},
{1, 1, 2, 3},
{3, 1, 1, 2}
};
//扩展密钥列表
unsigned char Ki[44][4]={
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
};
//逆S盒
unsigned char InverSBox[0x10][0x10]={
{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}
};
//S盒
unsigned char SBox[0x10][0x10]={
{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}
};
};
AES.cpp
#include "../include/AES.h"
AES::AES()
{
nullptr;
}
/**
*加密函数
**/
std::string AES::AES_Encode
(
_In_ const unsigned char* input_data,
_In_ size_t input_len,
_In_ unsigned char* key,
_Inout_ size_t key_len,
_Inout_ int& backcode
)
{
int count = (input_len/0x10);
int mod = (input_len%0x10);
std::string backdata;
unsigned char temp_mem[0x10];
unsigned char last_c[0x20];
memset(last_c, 0x00, 0x10);
//数据长度过大异常处理
if(input_len > 0xffffff)
{
backcode = __AES_INPUTDATA_TO_LONG;
return nullptr;
}
//密钥过短处理
if(key_len < 0x10)
{
backcode = __AES_KEYLENGHT_TO_SHORT;
return nullptr;
}
//将密钥拷贝进4×4列表中
memcpy(this->K, key, 0x10);
//将列表拷入44×4的列表中
memcpy(this->Ki, this->K, 0x10);
//扩展密钥
KeyExtend();
//计算前几轮
for(int j=1;j<=count;j++)
{
//将明文16字节一组拷贝进表
memcpy(this->P, (input_data+(0x10*(j-1))), 0x10);
/**
*加密过程
**/
//第一轮前轮密钥加
this->P[0][0] ^= this->Ki[0][0];
this->P[0][1] ^= this->Ki[0][1];
this->P[0][2] ^= this->Ki[0][2];
this->P[0][3] ^= this->Ki[0][3];
this->P[1][0] ^= this->Ki[1][0];
this->P[1][1] ^= this->Ki[1][1];
this->P[1][2] ^= this->Ki[1][2];
this->P[1][3] ^= this->Ki[1][3];
this->P[2][0] ^= this->Ki[2][0];
this->P[2][1] ^= this->Ki[2][1];
this->P[2][2] ^= this->Ki[2][2];
this->P[2][3] ^= this->Ki[2][3];
this->P[3][0] ^= this->Ki[3][0];
this->P[3][1] ^= this->Ki[3][1];
this->P[3][2] ^= this->Ki[3][2];
this->P[3][3] ^= this->Ki[3][3];
//10轮加密
for(int i=1;i<=0x0a;i++)
EncodeHandle(i);
}
//输出调试查看前十六个字节内容加密是否正确
for(int u=0;u<4;u++)
{
for(int y=0;y<4;y++)
printf("%lx ", this->P[u][y]);
puts("\n");
}
//如果无法整除16
/*if(mod)
{
//差值
unsigned char dif = (0x10-mod);
//差几个字节,就补几个几
memset(this->P, dif, 0x10);
//把明文余下的几个字节拷贝进来
memcpy(this->P, (input_data-mod), mod);
}
//如果能够整除就在最后再添加16个16
else
{
memset(this->P, 0x10, 0x10);
}*/
backcode = 0;
return backdata;
}
/**
*加密处理函数
**/
void AES::EncodeHandle(
_In_ int roud
)
{
/**
1.字节代换
**/
this->P[0][0] = this->SBox[GET_HIGHT(this->P[0][0])][GET_LOW(this->P[0][0])];
this->P[0][1] = this->SBox[GET_HIGHT(this->P[0][1])][GET_LOW(this->P[0][1])];
this->P[0][2] = this->SBox[GET_HIGHT(this->P[0][2])][GET_LOW(this->P[0][2])];
this->P[0][3] = this->SBox[GET_HIGHT(this->P[0][3])][GET_LOW(this->P[0][3])];
this->P[1][0] = this->SBox[GET_HIGHT(this->P[1][0])][GET_LOW(this->P[1][0])];
this->P[1][1] = this->SBox[GET_HIGHT(this->P[1][1])][GET_LOW(this->P[1][1])];
this->P[1][2] = this->SBox[GET_HIGHT(this->P[1][2])][GET_LOW(this->P[1][2])];
this->P[1][3] = this->SBox[GET_HIGHT(this->P[1][3])][GET_LOW(this->P[1][3])];
this->P[2][0] = this->SBox[GET_HIGHT(this->P[2][0])][GET_LOW(this->P[2][0])];
this->P[2][1] = this->SBox[GET_HIGHT(this->P[2][1])][GET_LOW(this->P[2][1])];
this->P[2][2] = this->SBox[GET_HIGHT(this->P[2][2])][GET_LOW(this->P[2][2])];
this->P[2][3] = this->SBox[GET_HIGHT(this->P[2][3])][GET_LOW(this->P[2][3])];
this->P[3][0] = this->SBox[GET_HIGHT(this->P[3][0])][GET_LOW(this->P[3][0])];
this->P[3][1] = this->SBox[GET_HIGHT(this->P[3][1])][GET_LOW(this->P[3][1])];
this->P[3][2] = this->SBox[GET_HIGHT(this->P[3][2])][GET_LOW(this->P[3][2])];
this->P[3][3] = this->SBox[GET_HIGHT(this->P[3][3])][GET_LOW(this->P[3][3])];
/**
*2.行位移,第一行不用动从第二行开始
**/
unsigned char tmp = 0;
unsigned char tmp1 = 0;
unsigned char tmp2 = 0;
//第二行左移1位
tmp = this->P[1][0];
this->P[1][0] = this->P[1][1];
this->P[1][1] = this->P[1][2];
this->P[1][2] = this->P[1][3];
this->P[1][3] = tmp;
//第三行左移2位
tmp = this->P[2][0];
tmp1 = this->P[2][1];
this->P[2][0] = this->P[2][2];
this->P[2][1] = this->P[2][3];
this->P[2][2] = tmp;
this->P[2][3] = tmp1;
//第四行左移3位
tmp = this->P[3][0];
tmp1 = this->P[3][1];
tmp2 = this->P[3][2];
this->P[3][0] = this->P[3][3];
this->P[3][1] = tmp;
this->P[3][2] = tmp1;
this->P[3][3] = tmp2;
/**
*3.列混合
**/
//只有前9轮需要列混合
if(roud < 10)
{
unsigned char tmp_p[4][4];
memcpy(tmp_p, this->P, 0x10);
this->P[0][0] = GFMul(colM[0][0],tmp_p[0][0]) ^ GFMul(colM[0][1],tmp_p[0][1])
^ GFMul(colM[0][2],tmp_p[0][2]) ^ GFMul(colM[0][3], tmp_p[0][3]);
this->P[0][1] = GFMul(colM[1][0],tmp_p[0][0]) ^ GFMul(colM[1][1],tmp_p[0][1])
^ GFMul(colM[1][2],tmp_p[0][2]) ^ GFMul(colM[1][3], tmp_p[0][3]);
this->P[0][2] = GFMul(colM[2][0],tmp_p[0][0]) ^ GFMul(colM[2][1],tmp_p[0][1])
^ GFMul(colM[2][2],tmp_p[0][2]) ^ GFMul(colM[2][3], tmp_p[0][3]);
this->P[0][3] = GFMul(colM[3][0],tmp_p[0][0]) ^ GFMul(colM[3][1],tmp_p[0][1])
^ GFMul(colM[3][2],tmp_p[0][2]) ^ GFMul(colM[3][3], tmp_p[0][3]);
this->P[1][0] = GFMul(colM[0][0],tmp_p[1][0]) ^ GFMul(colM[0][1],tmp_p[1][1])
^ GFMul(colM[0][2],tmp_p[1][2]) ^ GFMul(colM[0][3], tmp_p[1][3]);
this->P[1][1] = GFMul(colM[1][0],tmp_p[1][0]) ^ GFMul(colM[1][1],tmp_p[1][1])
^ GFMul(colM[1][2],tmp_p[1][2]) ^ GFMul(colM[1][3], tmp_p[1][3]);
this->P[1][2] = GFMul(colM[2][0],tmp_p[1][0]) ^ GFMul(colM[2][1],tmp_p[1][1])
^ GFMul(colM[2][2],tmp_p[1][2]) ^ GFMul(colM[2][3], tmp_p[1][3]);
this->P[1][3] = GFMul(colM[3][0],tmp_p[1][0]) ^ GFMul(colM[3][1],tmp_p[1][1])
^ GFMul(colM[3][2],tmp_p[1][2]) ^ GFMul(colM[3][3], tmp_p[1][3]);
this->P[2][0] = GFMul(colM[0][0],tmp_p[2][0]) ^ GFMul(colM[0][1],tmp_p[2][1])
^ GFMul(colM[0][2],tmp_p[2][2]) ^ GFMul(colM[0][3], tmp_p[2][3]);
this->P[2][1] = GFMul(colM[1][0],tmp_p[2][0]) ^ GFMul(colM[1][1],tmp_p[2][1])
^ GFMul(colM[1][2],tmp_p[2][2]) ^ GFMul(colM[1][3], tmp_p[2][3]);
this->P[2][2] = GFMul(colM[2][0],tmp_p[2][0]) ^ GFMul(colM[2][1],tmp_p[2][1])
^ GFMul(colM[2][2],tmp_p[2][2]) ^ GFMul(colM[2][3], tmp_p[2][3]);
this->P[2][3] = GFMul(colM[3][0],tmp_p[2][0]) ^ GFMul(colM[3][1],tmp_p[2][1])
^ GFMul(colM[3][2],tmp_p[2][2]) ^ GFMul(colM[3][3], tmp_p[2][3]);
this->P[3][0] = GFMul(colM[0][0],tmp_p[3][0]) ^ GFMul(colM[0][1],tmp_p[3][1])
^ GFMul(colM[0][2],tmp_p[3][2]) ^ GFMul(colM[0][3], tmp_p[3][3]);
this->P[3][1] = GFMul(colM[1][0],tmp_p[3][0]) ^ GFMul(colM[1][1],tmp_p[3][1])
^ GFMul(colM[1][2],tmp_p[3][2]) ^ GFMul(colM[1][3], tmp_p[3][3]);
this->P[3][2] = GFMul(colM[2][0],tmp_p[3][0]) ^ GFMul(colM[2][1],tmp_p[3][1])
^ GFMul(colM[2][2],tmp_p[3][2]) ^ GFMul(colM[2][3], tmp_p[3][3]);
this->P[3][3] = GFMul(colM[3][0],tmp_p[3][0]) ^ GFMul(colM[3][1],tmp_p[3][1])
^ GFMul(colM[3][2],tmp_p[3][2]) ^ GFMul(colM[3][3], tmp_p[3][3]);
}
/**
4.轮密钥加
**/
this->P[0][0] ^= this->Ki[roud*4+0][0];
this->P[0][1] ^= this->Ki[roud*4+0][1];
this->P[0][2] ^= this->Ki[roud*4+0][2];
this->P[0][3] ^= this->Ki[roud*4+0][3];
this->P[1][0] ^= this->Ki[roud*4+1][0];
this->P[1][1] ^= this->Ki[roud*4+1][1];
this->P[1][2] ^= this->Ki[roud*4+1][2];
this->P[1][3] ^= this->Ki[roud*4+1][3];
this->P[2][0] ^= this->Ki[roud*4+2][0];
this->P[2][1] ^= this->Ki[roud*4+2][1];
this->P[2][2] ^= this->Ki[roud*4+2][2];
this->P[2][3] ^= this->Ki[roud*4+2][3];
this->P[3][0] ^= this->Ki[roud*4+3][0];
this->P[3][1] ^= this->Ki[roud*4+3][1];
this->P[3][2] ^= this->Ki[roud*4+3][2];
this->P[3][3] ^= this->Ki[roud*4+3][3];
}
/**
*GF二元运算函数
**/
unsigned char AES::GFMul(
_In_ unsigned char x,
_In_ unsigned char n
)
{
unsigned int tp = 0;
switch (x)
{
case 1:
tp = n;
break;
case 2:
tp = GFMulT(n);
break;
case 3:
tp = GFMulT(n) ^ n;
break;
default:
break;
}
return (unsigned char)tp;
}
unsigned int AES::GFMulT(
_In_ unsigned char s
)
{
unsigned int result = s<<1;
unsigned int a7 = result & 0x00000100;
if(a7)
{
result = result & 0x000000ff;
result = result ^ 0x1b;
}
return result;
}
/**
*密钥扩展函数
**/
void AES::KeyExtend()
{
//W[4] = W[0] ⨁ T(W[3])
//常量Rcon
unsigned char tmp_list[4];
unsigned char back_list[4];
unsigned char Rcon[0xa] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36};
for(int i=4;i<44;i++)
{
//每16字节为一组,每组开始的四字节执行以下操作
if(!(i%4))
{
//开始三步走:
//1.循环位移
unsigned char tmp = 0;
memcpy(tmp_list, &this->Ki[i-4], 4);
//将4-1下标的数组元素拷贝到第4组中
this->Ki[i][0] = this->Ki[i-1][0];
this->Ki[i][1] = this->Ki[i-1][1];
this->Ki[i][2] = this->Ki[i-1][2];
this->Ki[i][3] = this->Ki[i-1][3];
//位移
tmp = this->Ki[i][0];
this->Ki[i][0] = this->Ki[i][1];
this->Ki[i][1] = this->Ki[i][2];
this->Ki[i][2] = this->Ki[i][3];
this->Ki[i][3] = tmp;
//2.去S盒查表
this->Ki[i][0] = tmp_list[0] ^ (this->SBox[GET_HIGHT(this->Ki[i][0])][GET_LOW(this->Ki[i][0])] ^ Rcon[(i-4)/4]);
this->Ki[i][1] = tmp_list[1] ^ this->SBox[GET_HIGHT(this->Ki[i][1])][GET_LOW(this->Ki[i][1])];
this->Ki[i][2] = tmp_list[2] ^ this->SBox[GET_HIGHT(this->Ki[i][2])][GET_LOW(this->Ki[i][2])];
this->Ki[i][3] = tmp_list[3] ^ this->SBox[GET_HIGHT(this->Ki[i][3])][GET_LOW(this->Ki[i][3])];
memcpy(back_list, &this->Ki[i], 0x04);
}
//剩下的12字节执行以下下操作
else
{
this->Ki[i][0] = this->Ki[i-4][0] ^ back_list[0];
this->Ki[i][1] = this->Ki[i-4][1] ^ back_list[1];
this->Ki[i][2] = this->Ki[i-4][2] ^ back_list[2];
this->Ki[i][3] = this->Ki[i-4][3] ^ back_list[3];
memcpy(back_list, &this->Ki[i], 4);
}
}
return;
}
AES::~AES()
{
nullptr;
}
暂时只对前十六个字节进行了加密处理,后面还要补齐的内容还未作处理,但加密结果是错的
正确的:
我的: