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  • Qt使用AES加密算法对字符串进行加密

     
        因工作需要，需要对字符串进行加密处理，在网上找了很长时间，终于找到了一个可以使用的aes加密算法。
    其源代码采用c++编写而成，但其头文件引用windows.h，经过修改部分代码，将#include<windows.h>
    去掉，这样可是使用与多个编译器。下面的代码中列出了测试用的代码(中文出现乱码现象)：

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    1. int main(int argc, char *argv[])
    2. {
    3.     QCoreApplication a(argc, argv);
    5.     TAesClass *aes = new TAesClass;
    6.     char mingwen[1024] = "cheng xiaopeng";
    7.     DWORD size = strlen(mingwen);
    8.     char miwen[1024];
    9.     char jiemi[1024];
    10.     UCHAR key[1024] = "xcy";
    11.     UCHAR *p = key;
    12.     aes->InitializePrivateKey(16, p); //进行初始化
    13.     aes->OnAesEncrypt((LPVOID)mingwen, size, (LPVOID)miwen); //进行加密
    14.     aes->OnAesUncrypt((LPVOID)miwen, (DWORD)sizeof(miwen),(LPVOID)jiemi); //进行解密
    16.     //打印信息
    17.     qDebug() << "mingwen:" << mingwen;
    18.     qDebug() << "miwen:" << miwen;
    19.     qDebug() << "jiemi:" <<jiemi;
    21.     free(aes);
    22.     aes = 0;
    23.     return a.exec();
    24. }
    程序编译，运行的结果为：

    mingwen: cheng xiaopeng

    miwen: D"Òæ7þ†³¡»qŠ2·EMÌT<ì(c@öaéGÜE®¿Ž2G

    jiemi: cheng xiaopeng 

    TAesClass.h的源代码

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    1. #include <string.h>
    2. #include <stdio.h>
    3. #include <stdlib.h>
    4. #include <ctype.h>
    6. typedef unsigned long DWORD;
    7. typedef unsigned char UCHAR,*PUCHAR;
    8. typedef void *PVOID,*LPVOID;
    9. typedef unsigned char byte;
    10. typedef DWORD *PDWORD,*LPDWORD;
    12. #ifndef VOID
    13. #define VOID void
    14. #endif
    16. //#pragma once
    18. //enum KeySize { Bits128, Bits192, Bits256 }; // key size, in bits, for construtor
    19. #define Bits128    16
    20. #define Bits192    24
    21. #define Bits256    32
    23. static unsigned char AesSbox[16*16]=
    24. {// populate the Sbox matrix
    25.     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
    26.     /*0*/ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
    27.     /*1*/ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
    28.     /*2*/ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
    29.     /*3*/ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
    30.     /*4*/ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
    31.     /*5*/ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
    32.     /*6*/ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
    33.     /*7*/ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
    34.     /*8*/ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
    35.     /*9*/ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
    36.     /*a*/ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
    37.     /*b*/ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
    38.     /*c*/ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
    39.     /*d*/ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
    40.     /*e*/ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
    41.     /*f*/ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
    42. };
    44. static unsigned char AesiSbox[16*16]=
    45. {
    46.     // populate the iSbox matrix
    47.     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
    48.     /*0*/ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
    49.     /*1*/ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
    50.     /*2*/ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
    51.     /*3*/ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
    52.     /*4*/ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
    53.     /*5*/ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
    54.     /*6*/ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
    55.     /*7*/ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
    56.     /*8*/ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
    57.     /*9*/ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
    58.     /*a*/ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
    59.     /*b*/ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
    60.     /*c*/ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
    61.     /*d*/ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
    62.     /*e*/ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
    63.     /*f*/ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
    64. };
    65. static unsigned char AesRcon[11*4]=
    66. {
    67.     0x00, 0x00, 0x00, 0x00, 
    68.         0x01, 0x00, 0x00, 0x00,
    69.         0x02, 0x00, 0x00, 0x00,
    70.         0x04, 0x00, 0x00, 0x00,
    71.         0x08, 0x00, 0x00, 0x00,
    72.         0x10, 0x00, 0x00, 0x00,
    73.         0x20, 0x00, 0x00, 0x00,
    74.         0x40, 0x00, 0x00, 0x00,
    75.         0x80, 0x00, 0x00, 0x00,
    76.         0x1b, 0x00, 0x00, 0x00,
    77.         0x36, 0x00, 0x00, 0x00
    78. };
    81. class Aes // Advanced Encryption Standard
    82. {
    83. public:
    84.     ~Aes();
    85.     Aes();
    86.     Aes(int keySize, unsigned char* keyBytes);
    87.     unsigned char State[4][4];
    88.     void Cipher(unsigned char* input, unsigned char* output); // encipher 16-bit input
    89.     void InvCipher(unsigned char* input, unsigned char* output); // decipher 16-bit input
    90. private:
    91.     int Nb; // block size in 32-bit words. Always 4 for AES. (128 bits).
    92.     int Nk; // key size in 32-bit words. 4, 6, 8. (128, 192, 256 bits).
    93.     int Nr; // number of rounds. 10, 12, 14.
    95.     unsigned char key[32];
    96.     unsigned char w[16*15];
    98.     void SetNbNkNr(int keySize);
    99.     void AddRoundKey(int round); //轮密钥加
    100.     void SubBytes(); //S盒字节代换
    101.     void InvSubBytes(); //逆S盒字节代换
    102.     void ShiftRows(); //行移位
    103.     void InvShiftRows();
    104.     void MixColumns(); //列混淆
    105.     void InvMixColumns();
    106.     unsigned char gfmultby01(unsigned char b);
    107.     unsigned char gfmultby02(unsigned char b);
    108.     unsigned char gfmultby03(unsigned char b);
    109.     unsigned char gfmultby09(unsigned char b);
    110.     unsigned char gfmultby0b(unsigned char b);
    111.     unsigned char gfmultby0d(unsigned char b);
    112.     unsigned char gfmultby0e(unsigned char b);
    113.     void KeyExpansion(); //密钥扩展
    114.     unsigned char* SubWord(unsigned char* word); //密钥S盒字代换
    115.     unsigned char* RotWord(unsigned char* word); //密钥移位
    116.     
    117. };
    119. class TAesClass
    120. {
    121. public:
    122.     TAesClass();
    123.     ~TAesClass();
    124.   void InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes); //AES 密钥初始化
    125.     DWORD OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 加密数据
    126.     DWORD OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 解密数据
    127. private:
    128.     Aes * m_lpAes;
    129. };
    TAesClass.cpp的源代码

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    1. #include "TAesClass.h"
    3. Aes::~Aes()
    4. {
    6. }
    7. Aes::Aes()
    8. {
    10. }
    11. ////////////////////////////////////////////////////////////////////////////////////////////////
    12. //构造函数
    13. Aes::Aes(int keysize,unsigned char* keyBytes)
    14. {
    15.     SetNbNkNr(keysize); //设置密钥块数，轮数 
    16.     memcpy(key,keyBytes,keysize);                //字符串拷贝函数，把keyBytes的keysize个字符复制到key中
    17.     KeyExpansion();                                //密钥扩展，必须提前做的初始化
    18. }
    19. ////////////////////////////////////////////////////////////////////////////////////////////////
    20. void Aes::SetNbNkNr(int keySize)
    21. {
    22.     Nb=4;
    23.     if(keySize==Bits128)
    24.     {
    25.         Nk=4; //4*4字节，128位密钥，10轮加密
    26.         Nr=10;
    27.     }
    28.     else if(keySize==Bits192)
    29.     {
    30.         Nk=6; //6*4字节，192位密钥，12轮加密
    31.         Nr=12;
    32.     }
    33.     else if(keySize==Bits256)
    34.     {
    35.         Nk=8; //8*4字节，256位密钥，14轮加密
    36.         Nr=14;
    37.     }
    38. }
    39. ////////////////////////////////////////////////////////////////////////////////////////////////
    40. void Aes::KeyExpansion()
    41. {
    43.     memset(w,0,16*15);
    44.     for(int row=0;row<Nk;row++) //拷贝seed 密钥
    45.     {
    46.         w[4*row+0] = key[4*row];
    47.         w[4*row+1] = key[4*row+1];
    48.         w[4*row+2] = key[4*row+2];
    49.         w[4*row+3] = key[4*row+3];
    50.     }
    51.     byte* temp = new byte[4];
    52.     for(int row=Nk;row<4*(Nr+1);row++)
    53.     {
    54.         temp[0]=w[4*row-4]; //当前列的前一列 
    55.         temp[1]=w[4*row-3];
    56.         temp[2]=w[4*row-2];
    57.         temp[3]=w[4*row-1];
    58.         if(row%Nk==0) //逢nk时，对当前列的前一列作特殊处理
    59.         {
    60.             temp=SubWord(RotWord(temp)); //先移位，再代换，最后和轮常量异或
    61.             temp[0] = (byte)( (int)temp[0] ^ (int) AesRcon[4*(row/Nk)+0] ); 
    62.             temp[1] = (byte)( (int)temp[1] ^ (int) AesRcon[4*(row/Nk)+1] );
    63.             temp[2] = (byte)( (int)temp[2] ^ (int) AesRcon[4*(row/Nk)+2] );
    64.             temp[3] = (byte)( (int)temp[3] ^ (int) AesRcon[4*(row/Nk)+3] );
    65.         }
    66.         else if ( Nk > 6 && (row % Nk == 4) ) //这个还没有搞清楚
    67.         {
    68.             temp = SubWord(temp);
    69.         }
    71.         // w[row] = w[row-Nk] xor temp
    72.         w[4*row+0] = (byte) ( (int) w[4*(row-Nk)+0] ^ (int)temp[0] );
    73.         w[4*row+1] = (byte) ( (int) w[4*(row-Nk)+1] ^ (int)temp[1] );
    74.         w[4*row+2] = (byte) ( (int) w[4*(row-Nk)+2] ^ (int)temp[2] );
    75.         w[4*row+3] = (byte) ( (int) w[4*(row-Nk)+3] ^ (int)temp[3] );
    76.     } // for loop
    78. }
    79. ////////////////////////////////////////////////////////////////////////////////////////////////
    80. //密钥移位函数
    81. unsigned char* Aes::RotWord(unsigned char* word)
    82. {
    83.     byte* temp = new byte[4];
    84.     temp[0] = word[1];
    85.     temp[1] = word[2];
    86.     temp[2] = word[3];
    87.     temp[3] = word[0];
    88.     return temp;
    89. }
    90. ////////////////////////////////////////////////////////////////////////////////////////////////
    91. //密钥字代换函数
    92. unsigned char* Aes::SubWord(unsigned char* word)
    93. {
    94.     byte* temp = new byte[4];
    95.     for(int j=0;j<4;j++)
    96.     {
    97.         temp[j] = AesSbox[16*(word[j] >> 4)+(word[j] & 0x0f)]; //实际上也可以写成AesSbox[[j]];因为两者相等
    98.     }
    99.     return temp;
    101. }
    102. ////////////////////////////////////////////////////////////////////////////////////////////////
    103. //Aes加密函数
    104. void Aes::Cipher(unsigned char* input, unsigned char* output)
    105. {
    106.     memset(&State[0][0],0,16);
    107.     for(int i=0;i<4*Nb;i++) //这里是先写列后写行的，即输入是一列一列的进来的
    108.     {
    109.         State[i%4][i/4]=input[i];                    //换成先写行后写列也是可以的，只要在输出时也是这样就可以了
    110.     }
    111.     AddRoundKey(0);                                    //轮密钥加
    113.     for (int round = 1; round <= (Nr - 1); round++) // main round loop
    114.     {
    115.         SubBytes();                                    //字节代换
    116.         ShiftRows();                                //行移位
    117.         MixColumns();                                //列混淆
    118.         AddRoundKey(round);                            //轮密钥加
    119.     } // main round loop
    121.     SubBytes();                                        //字节代换
    122.     ShiftRows();                                    //行移位
    123.     AddRoundKey(Nr);                                //轮密钥加
    125.     // output = state
    126.     for (int i = 0; i < (4 * Nb); i++)
    127.     {
    128.         output[i] = State[i % 4][ i / 4];
    129.     }
    131. }
    132. ////////////////////////////////////////////////////////////////////////////////////////////////
    133. //Aes解密函数
    134. void Aes::InvCipher(unsigned char* input,unsigned char* output)
    135. {
    136.     memset(&State[0][0],0,16);
    137.     for (int i = 0; i < (4 * Nb); i++)
    138.     {
    139.         State[i % 4][ i / 4] = input[i];
    140.     }
    142.     AddRoundKey(Nr);
    144.     for (int round = Nr-1; round >= 1; round--) // main round loop
    145.     {
    146.         InvShiftRows();
    147.         InvSubBytes();
    148.         AddRoundKey(round);
    149.         InvMixColumns();
    150.     } // end main round loop for InvCipher
    152.     InvShiftRows();
    153.     InvSubBytes();
    154.     AddRoundKey(0);
    156.     // output = state
    157.     for (int i = 0; i < (4 * Nb); i++)
    158.     {
    159.         output[i] = State[i % 4][ i / 4];
    160.     }
    161. }
    162. ////////////////////////////////////////////////////////////////////////////////////////////////
    163. //轮密钥加
    164. void Aes::AddRoundKey(int round)
    165. {
    166.     int i,j; //i行 j列 //因为密钥w是一列一列排列的，即 k0 k4 k8 k12
    167.     for(j=0;j<4;j++)             //                             k1 k5 k9 k13
    168.     {                             //                             k2 k6 k10k14
    169.         for(i=0;i<4;i++)         //                             k3 k7 k11k15
    170.         {                         // 所以i行j列的下标是4*((round*4)+j)+i即16*round+4*j+i
    171.             State[i][j]=(unsigned char)((int)State[i][j]^(int)w[4*((round*4)+j)+i]); 
    172.         }
    173.     }
    174. }
    175. ////////////////////////////////////////////////////////////////////////////////////////////////
    176. //字节代换函数
    177. void Aes::SubBytes() //Page 103
    178. {
    179.     int i,j;
    180.     for(j=0;j<4;j++)
    181.     {
    182.         for(i=0;i<4;i++)
    183.         {
    184.             State[i][j]=AesSbox[State[i][j]];
    185.             //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]
    188.         }
    189.     }
    190. }
    192. void Aes::InvSubBytes()
    193. {
    194.     int i,j;
    195.     for(j=0;j<4;j++)
    196.     {
    197.         for(i=0;i<4;i++)
    198.         {
    199.             State[i][j]=AesiSbox[State[i][j]]; //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]
    200.         }
    201.     }
    203. }
    204. ////////////////////////////////////////////////////////////////////////////////////////////////
    205. void Aes::ShiftRows()
    206. {
    207.     unsigned char temp[4*4]; //Page105
    208.     int i,j;
    209.     for(j=0;j<4;j++)
    210.     {
    211.         for(i=0;i<4;i++)
    212.         {
    213.             temp[4*i+j]=State[i][j];
    214.         }
    215.     }
    216.     for(i=1;i<4;i++)
    217.     {
    218.         for(j=0;j<4;j++)
    219.         {
    220.             if(i==1)State[i][j]=temp[4*i+(j+1)%4];                    //第一行左移1位
    221.             else if(i==2)State[i][j]=temp[4*i+(j+2)%4];                //第二行左移2位
    222.             else if(i==3)State[i][j]=temp[4*i+(j+3)%4];                //第三行左移3位
    223.         }
    224.     }
    226. }
    227. void Aes::InvShiftRows()
    228. {
    229.     unsigned char temp[4*4];
    230.     int i,j;
    231.     for(j=0;j<4;j++)
    232.     {
    233.         for(i=0;i<4;i++)
    234.         {
    235.             temp[4*i+j]=State[i][j];
    236.         }
    237.     }
    238.     for(i=1;i<4;i++)
    239.     {
    240.         for(j=0;j<4;j++)
    241.         {
    242.             //if(i==1)State[i][j]=temp[4*i+(j-1)%4]; 在此犯了一个错误 -1%4=-1 而不是3，所以采用了下面再加一个4的做法
    243.             if(i==1)State[i][j]=temp[4*i+(j+3)%4];            //第一行右移1位 j-1+4=j+3
    244.             else if(i==2)State[i][j]=temp[4*i+(j+2)%4];        //第二行右移2位 j-2+4=j+2
    245.             else if(i==3)State[i][j]=temp[4*i+(j+1)%4];        //第三行右移3位 j-3+4=j+2
    246.         }
    247.     }
    249. }
    250. ////////////////////////////////////////////////////////////////////////////////////////////////
    251. void Aes::MixColumns()
    252. {
    253.     unsigned char temp[4*4];
    254.     int i,j;
    255.     for(j=0;j<4;j++) //2 3 1 1 列混淆矩阵 Page107
    256.     {                                                    //1 2 3 1
    257.         for(i=0;i<4;i++)                                //1 1 2 3
    258.         {                                                //3 1 1 2
    259.             temp[4*i+j]=State[i][j];
    260.         }
    261.     }
    262.     for(j=0;j<4;j++)
    263.     {
    264.         State[0][j] = (unsigned char) ( (int)gfmultby02(temp[0+j]) ^ (int)gfmultby03(temp[4*1+j]) ^
    265.             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
    266.         State[1][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby02(temp[4*1+j]) ^
    267.             (int)gfmultby03(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
    268.         State[2][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
    269.             (int)gfmultby02(temp[4*2+j]) ^ (int)gfmultby03(temp[4*3+j]) );
    270.         State[3][j] = (unsigned char) ( (int)gfmultby03(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
    271.             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby02(temp[4*3+j]) );
    272.     }
    274. }
    275. void Aes::InvMixColumns()
    276. {
    277.     unsigned char temp[4*4];
    278.     int i,j;
    279.     for (i = 0; i < 4; i++) // copy State into temp[]
    280.     {
    281.         for (j = 0; j < 4; j++) //0e 0b 0d 09 逆变换矩阵 Page108
    282.         {                                                //09 0e 0b 0d
    283.             temp[4*i+j] = State[i][j];                    //0d 09 0e 0b
    284.         }                                                //0b 0d 09 0e
    285.     }
    287.     for (j = 0; j < 4; j++)
    288.     {
    289.         State[0][j] = (unsigned char) ( (int)gfmultby0e(temp[j]) ^ (int)gfmultby0b(temp[4+j]) ^
    290.             (int)gfmultby0d(temp[4*2+j]) ^ (int)gfmultby09(temp[4*3+j]) );
    291.         State[1][j] = (unsigned char) ( (int)gfmultby09(temp[j]) ^ (int)gfmultby0e(temp[4+j]) ^
    292.             (int)gfmultby0b(temp[4*2+j]) ^ (int)gfmultby0d(temp[4*3+j]) );
    293.         State[2][j] = (unsigned char) ( (int)gfmultby0d(temp[j]) ^ (int)gfmultby09(temp[4+j]) ^
    294.             (int)gfmultby0e(temp[4*2+j]) ^ (int)gfmultby0b(temp[4*3+j]) );
    295.         State[3][j] = (unsigned char) ( (int)gfmultby0b(temp[j]) ^ (int)gfmultby0d(temp[4+j]) ^
    296.             (int)gfmultby09(temp[4*2+j]) ^ (int)gfmultby0e(temp[4*3+j]) );
    297.     }
    298. }
    299. ////////////////////////////////////////////////////////////////////////////////////////////////
    300. unsigned char Aes::gfmultby01(unsigned char b)
    301. {
    302.     return b;
    303. }
    304. unsigned char Aes::gfmultby02(unsigned char b)
    305. {
    306.     if (b < 0x80)
    307.         return (unsigned char)(int)(b <<1);
    308.     else
    309.         return (unsigned char)( (int)(b << 1) ^ (int)(0x1b) );
    310. }
    312. unsigned char Aes::gfmultby03(unsigned char b)
    313. {
    314.     return (unsigned char) ( (int)gfmultby02(b) ^ (int)b );
    315. }
    317. unsigned char Aes::gfmultby09(unsigned char b)
    318. {
    319.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^ (int)b );
    320. }
    322. unsigned char Aes::gfmultby0b(unsigned char b)
    323. {
    324.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
    325.         (int)gfmultby02(b) ^ (int)b );
    326. }
    328. unsigned char Aes::gfmultby0d(unsigned char b)
    329. {
    330.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
    331.         (int)gfmultby02(gfmultby02(b)) ^ (int)(b) );
    332. }
    334. unsigned char Aes::gfmultby0e(unsigned char b)
    335. {
    336.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
    337.         (int)gfmultby02(gfmultby02(b)) ^(int)gfmultby02(b) );
    338. }
    340. TAesClass::TAesClass()
    341. {
    342.     m_lpAes=NULL;
    343.     InitializePrivateKey(16,(unsigned char*)"x79x76x68x6Bx77x66x6Ex68x72x65x73x63x6Cx6Bx70x6E");
    344. }
    346. TAesClass::~TAesClass()
    347. {
    348.     if (m_lpAes!=NULL)
    349.     {
    350.         delete m_lpAes;
    351.     }
    352. }
    353. //------------------------------------------------------------------------------------------------------------
    354. // 编写人员：wfnhddd
    355. //
    356. // 函数名称：InitializeAes
    357. //
    358. // 函数描述：初始化AES 密钥，密钥用于加密解密
    359. //
    360. // 调用参数：详细说明参考 MSDN 中的相关描述或相关的开发文档
    361. //
    362. // 返回数值：无
    363. //
    364. // 最近修改：2009 年 08 月 07 日
    365. //------------------------------------------------------------------------------------------------------------
    368. VOID TAesClass::InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes)
    369. {
    370.     if (m_lpAes)
    371.     {
    372.         delete m_lpAes;
    373.         m_lpAes=NULL;
    374.     }
    375.     m_lpAes=new Aes(KeySize,KeyBytes);
    377. }
    379. //------------------------------------------------------------------------------------------------------------
    380. // 编写人员：wfnhddd
    381. //
    382. // 函数名称：OnAesEncrypt
    383. //
    384. // 函数描述：用AES加密算法加密数据
    385. //
    386. // 调用参数：详细说明参考 MSDN 中的相关描述或相关的开发文档
    387. //
    388. // 返回数值：加密后的数据大小 ，错误返回值 0
    389. //
    390. // 最近修改：2009 年 08 月 07 日
    391. //------------------------------------------------------------------------------------------------------------
    393. DWORD TAesClass::OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
    394. {
    395.     DWORD OutLength=0;
    396.     if (m_lpAes==NULL||OutBuffer==NULL)
    397.     {
    398.         return 0;
    399.     }
    400.     
    401.     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
    402.     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
    403.     long blocknum=InLength/16;
    404.     long leftnum=InLength%16;
    405.     for(long i=0;i<blocknum;i++)
    406.     {        
    407.         m_lpAes->Cipher(lpCurInBuff,lpCurOutBuff);
    408.         lpCurInBuff+=16;
    409.         lpCurOutBuff+=16;
    410.         OutLength+=16;        
    411.     }
    412.     if(leftnum) //多余出leftnum 字节 则加密时 多出16-leftnum 个字节
    413.     {
    414.         UCHAR inbuff[16];
    415.         memset(inbuff,0,16);
    416.         memcpy(inbuff,lpCurInBuff,leftnum);
    417.         m_lpAes->Cipher(inbuff,lpCurOutBuff);
    418.         lpCurOutBuff+=16;
    419.         OutLength+=16;
    420.     }
    421.                                 //新增16个字节，用以确定增加的字节数
    422.     UCHAR extrabuff[16];
    423.     memset(extrabuff,0,16);
    424.     *((LPDWORD)extrabuff)=16+(16-leftnum)%16; //多出16+(16-leftnum)%16个字节
    425.     m_lpAes->Cipher(extrabuff,lpCurOutBuff);
    426.     OutLength+=16;
    427.     return OutLength;
    429. }
    432. //------------------------------------------------------------------------------------------------------------
    433. // 编写人员：wfnhddd
    434. //
    435. // 函数名称：OnAesUncrypt
    436. //
    437. // 函数描述：用AES加密算法解密数据
    438. //
    439. // 调用参数：详细说明参考 MSDN 中的相关描述或相关的开发文档
    440. //
    441. // 返回数值：解密后的数据大小 ，错误返回值 0
    442. //
    443. // 最近修改：2009 年 08 月 07 日
    444. //------------------------------------------------------------------------------------------------------------
    445. DWORD TAesClass::OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
    446. {
    447.     DWORD OutLength=0;
    448.     if (m_lpAes==NULL||OutBuffer==NULL)
    449.     {
    450.         return 0;
    451.     }
    452.     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
    453.     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
    454.     long blocknum=InLength/16;
    455.     long leftnum=InLength%16;
    456.         if(leftnum)
    457.     {
    458.                 return 0;
    459.     }
    460.     for(long i=0;i<blocknum;i++)
    461.     {        
    462.         m_lpAes->InvCipher(lpCurInBuff,lpCurOutBuff);
    463.         lpCurInBuff+=16;
    464.         lpCurOutBuff+=16;
    465.         OutLength+=16;        
    466.     }
    468.     UCHAR *lpExtraInBuff=lpCurOutBuff-16;
    469.     DWORD dwExtraBytes=*((LPDWORD)lpExtraInBuff);    
    470.     return (OutLength-dwExtraBytes);
    472. }
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  • 原文地址：https://www.cnblogs.com/lvdongjie/p/4241080.html
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