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
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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 int main(int argc, char *argv[])
 {
     QCoreApplication a(argc, argv);

     TAesClass *aes = new TAesClass;
     char mingwen[1024] = "cheng xiaopeng";
     DWORD size = strlen(mingwen);
     char miwen[1024];
     char jiemi[1024];
     UCHAR key[1024] = "xcy";
     UCHAR *p = key;
     aes->InitializePrivateKey(16, p); //进行初始化
     aes->OnAesEncrypt((LPVOID)mingwen, size, (LPVOID)miwen); //进行加密
     aes->OnAesUncrypt((LPVOID)miwen, (DWORD)sizeof(miwen),(LPVOID)jiemi); //进行解密

     //打印信息
     qDebug() << "mingwen:" << mingwen;
     qDebug() << "miwen:" << miwen;
     qDebug() << "jiemi:" <<jiemi;

     free(aes);
     aes = 0;
     return a.exec();
 }

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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 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>

 typedef unsigned long DWORD;
 typedef unsigned char UCHAR,*PUCHAR;
 typedef void *PVOID,*LPVOID;
 typedef unsigned char byte;
 typedef DWORD *PDWORD,*LPDWORD;

 #ifndef VOID
 #define VOID void
 #endif

 //#pragma once

 //enum KeySize { Bits128, Bits192, Bits256 }; // key size, in bits, for construtor
 #define Bits128    16
 #define Bits192    24
 #define Bits256    32

 static unsigned char AesSbox[16*16]=
 {// populate the Sbox matrix
     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
     /*0*/ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
     /*1*/ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
     /*2*/ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
     /*3*/ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
     /*4*/ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
     /*5*/ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
     /*6*/ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
     /*7*/ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
     /*8*/ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
     /*9*/ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
     /*a*/ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
     /*b*/ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
     /*c*/ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
     /*d*/ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
     /*e*/ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
     /*f*/ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
 };

 static unsigned char AesiSbox[16*16]=
 {
     // populate the iSbox matrix
     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
     /*0*/ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
     /*1*/ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
     /*2*/ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
     /*3*/ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
     /*4*/ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
     /*5*/ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
     /*6*/ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
     /*7*/ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
     /*8*/ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
     /*9*/ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
     /*a*/ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
     /*b*/ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
     /*c*/ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
     /*d*/ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
     /*e*/ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
     /*f*/ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
 };
 static unsigned char AesRcon[11*4]=
 {
     0x00, 0x00, 0x00, 0x00,
         0x01, 0x00, 0x00, 0x00,
         0x02, 0x00, 0x00, 0x00,
         0x04, 0x00, 0x00, 0x00,
         0x08, 0x00, 0x00, 0x00,
         0x10, 0x00, 0x00, 0x00,
         0x20, 0x00, 0x00, 0x00,
         0x40, 0x00, 0x00, 0x00,
         0x80, 0x00, 0x00, 0x00,
         0x1b, 0x00, 0x00, 0x00,
         0x36, 0x00, 0x00, 0x00
 };


 class Aes // Advanced Encryption Standard
 {
 public:
     ~Aes();
     Aes();
     Aes(int keySize, unsigned char* keyBytes);
     unsigned char State[4][4];
     void Cipher(unsigned char* input, unsigned char* output); // encipher 16-bit input
     void InvCipher(unsigned char* input, unsigned char* output); // decipher 16-bit input
 private:
     int Nb; // block size in 32-bit words. Always 4 for AES. (128 bits).
     int Nk; // key size in 32-bit words. 4, 6, 8. (128, 192, 256 bits).
     int Nr; // number of rounds. 10, 12, 14.

     unsigned char key[32];
     unsigned char w[16*15];

     void SetNbNkNr(int keySize);
     void AddRoundKey(int round); //轮密钥加
     void SubBytes(); //S盒字节代换
     void InvSubBytes(); //逆S盒字节代换
     void ShiftRows(); //行移位
     void InvShiftRows();
     void MixColumns(); //列混淆
     void InvMixColumns();
     unsigned char gfmultby01(unsigned char b);
     unsigned char gfmultby02(unsigned char b);
     unsigned char gfmultby03(unsigned char b);
     unsigned char gfmultby09(unsigned char b);
     unsigned char gfmultby0b(unsigned char b);
     unsigned char gfmultby0d(unsigned char b);
     unsigned char gfmultby0e(unsigned char b);
     void KeyExpansion(); //密钥扩展
     unsigned char* SubWord(unsigned char* word); //密钥S盒字代换
     unsigned char* RotWord(unsigned char* word); //密钥移位

 };

 class TAesClass
 {
 public:
     TAesClass();
     ~TAesClass();
   void InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes); //AES 密钥初始化
     DWORD OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 加密数据
     DWORD OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 解密数据
 private:
     Aes * m_lpAes;
 };

TAesClass.cpp的源代码

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 #include "TAesClass.h"

 Aes::~Aes()
 {

 }
 Aes::Aes()
 {

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //构造函数
 Aes::Aes(int keysize,unsigned char* keyBytes)
 {
     SetNbNkNr(keysize); //设置密钥块数，轮数
     memcpy(key,keyBytes,keysize);                //字符串拷贝函数，把keyBytes的keysize个字符复制到key中
     KeyExpansion();                                //密钥扩展，必须提前做的初始化
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 void Aes::SetNbNkNr(int keySize)
 {
     Nb=4;
     if(keySize==Bits128)
     {
         Nk=4; //4*4字节，128位密钥，10轮加密
         Nr=10;
     }
     else if(keySize==Bits192)
     {
         Nk=6; //6*4字节，192位密钥，12轮加密
         Nr=12;
     }
     else if(keySize==Bits256)
     {
         Nk=8; //8*4字节，256位密钥，14轮加密
         Nr=14;
     }
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 void Aes::KeyExpansion()
 {

     memset(w,0,16*15);
     for(int row=0;row<Nk;row++) //拷贝seed 密钥
     {
         w[4*row+0] = key[4*row];
         w[4*row+1] = key[4*row+1];
         w[4*row+2] = key[4*row+2];
         w[4*row+3] = key[4*row+3];
     }
     byte* temp = new byte[4];
     for(int row=Nk;row<4*(Nr+1);row++)
     {
         temp[0]=w[4*row-4]; //当前列的前一列
         temp[1]=w[4*row-3];
         temp[2]=w[4*row-2];
         temp[3]=w[4*row-1];
         if(row%Nk==0) //逢nk时，对当前列的前一列作特殊处理
         {
             temp=SubWord(RotWord(temp)); //先移位，再代换，最后和轮常量异或
             temp[0] = (byte)( (int)temp[0] ^ (int) AesRcon[4*(row/Nk)+0] );
             temp[1] = (byte)( (int)temp[1] ^ (int) AesRcon[4*(row/Nk)+1] );
             temp[2] = (byte)( (int)temp[2] ^ (int) AesRcon[4*(row/Nk)+2] );
             temp[3] = (byte)( (int)temp[3] ^ (int) AesRcon[4*(row/Nk)+3] );
         }
         else if ( Nk > 6 && (row % Nk == 4) ) //这个还没有搞清楚
         {
             temp = SubWord(temp);
         }

         // w[row] = w[row-Nk] xor temp
         w[4*row+0] = (byte) ( (int) w[4*(row-Nk)+0] ^ (int)temp[0] );
         w[4*row+1] = (byte) ( (int) w[4*(row-Nk)+1] ^ (int)temp[1] );
         w[4*row+2] = (byte) ( (int) w[4*(row-Nk)+2] ^ (int)temp[2] );
         w[4*row+3] = (byte) ( (int) w[4*(row-Nk)+3] ^ (int)temp[3] );
     } // for loop

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //密钥移位函数
 unsigned char* Aes::RotWord(unsigned char* word)
 {
     byte* temp = new byte[4];
     temp[0] = word[1];
     temp[1] = word[2];
     temp[2] = word[3];
     temp[3] = word[0];
     return temp;
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //密钥字代换函数
 unsigned char* Aes::SubWord(unsigned char* word)
 {
     byte* temp = new byte[4];
     for(int j=0;j<4;j++)
     {
         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
     }
     return temp;

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //Aes加密函数
 void Aes::Cipher(unsigned char* input, unsigned char* output)
 {
     memset(&State[0][0],0,16);
     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
     {
         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
     }
     AddRoundKey(0);                                    //轮密钥加

     for (int round = 1; round <= (Nr - 1); round++) // main round loop
     {
         SubBytes();                                    //字节代换
         ShiftRows();                                //行移位
         MixColumns();                                //列混淆
         AddRoundKey(round);                            //轮密钥加
     } // main round loop

     SubBytes();                                        //字节代换
     ShiftRows();                                    //行移位
     AddRoundKey(Nr);                                //轮密钥加

     // output = state
     for (int i = 0; i < (4 * Nb); i++)
     {
         output[i] = State[i % 4][ i / 4];
     }

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //Aes解密函数
 void Aes::InvCipher(unsigned char* input,unsigned char* output)
 {
     memset(&State[0][0],0,16);
     for (int i = 0; i < (4 * Nb); i++)
     {
         State[i % 4][ i / 4] = input[i];
     }

     AddRoundKey(Nr);

     for (int round = Nr-1; round >= 1; round--) // main round loop
     {
         InvShiftRows();
         InvSubBytes();
         AddRoundKey(round);
         InvMixColumns();
     } // end main round loop for InvCipher

     InvShiftRows();
     InvSubBytes();
     AddRoundKey(0);

     // output = state
     for (int i = 0; i < (4 * Nb); i++)
     {
         output[i] = State[i % 4][ i / 4];
     }
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //轮密钥加
 void Aes::AddRoundKey(int round)
 {
     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
     for(j=0;j<4;j++)             //                             k1 k5 k9 k13
     {                             //                             k2 k6 k10k14
         for(i=0;i<4;i++)         //                             k3 k7 k11k15
         {                         // 所以i行j列的下标是4*((round*4)+j)+i即16*round+4*j+i
             State[i][j]=(unsigned char)((int)State[i][j]^(int)w[4*((round*4)+j)+i]);
         }
     }
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //字节代换函数
 void Aes::SubBytes() //Page 103
 {
     int i,j;
     for(j=0;j<4;j++)
     {
         for(i=0;i<4;i++)
         {
             State[i][j]=AesSbox[State[i][j]];
             //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]


         }
     }
 }

 void Aes::InvSubBytes()
 {
     int i,j;
     for(j=0;j<4;j++)
     {
         for(i=0;i<4;i++)
         {
             State[i][j]=AesiSbox[State[i][j]]; //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]
         }
     }

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 void Aes::ShiftRows()
 {
     unsigned char temp[4*4]; //Page105
     int i,j;
     for(j=0;j<4;j++)
     {
         for(i=0;i<4;i++)
         {
             temp[4*i+j]=State[i][j];
         }
     }
     for(i=1;i<4;i++)
     {
         for(j=0;j<4;j++)
         {
             if(i==1)State[i][j]=temp[4*i+(j+1)%4];                    //第一行左移1位
             else if(i==2)State[i][j]=temp[4*i+(j+2)%4];                //第二行左移2位
             else if(i==3)State[i][j]=temp[4*i+(j+3)%4];                //第三行左移3位
         }
     }

 }
 void Aes::InvShiftRows()
 {
     unsigned char temp[4*4];
     int i,j;
     for(j=0;j<4;j++)
     {
         for(i=0;i<4;i++)
         {
             temp[4*i+j]=State[i][j];
         }
     }
     for(i=1;i<4;i++)
     {
         for(j=0;j<4;j++)
         {
             //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
             if(i==1)State[i][j]=temp[4*i+(j+3)%4];            //第一行右移1位 j-1+4=j+3
             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
             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
         }
     }

 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 void Aes::MixColumns()
 {
     unsigned char temp[4*4];
     int i,j;
     for(j=0;j<4;j++) //2 3 1 1 列混淆矩阵 Page107
     {                                                    //1 2 3 1
         for(i=0;i<4;i++)                                //1 1 2 3
         {                                                //3 1 1 2
             temp[4*i+j]=State[i][j];
         }
     }
     for(j=0;j<4;j++)
     {
         State[0][j] = (unsigned char) ( (int)gfmultby02(temp[0+j]) ^ (int)gfmultby03(temp[4*1+j]) ^
             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
         State[1][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby02(temp[4*1+j]) ^
             (int)gfmultby03(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
         State[2][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
             (int)gfmultby02(temp[4*2+j]) ^ (int)gfmultby03(temp[4*3+j]) );
         State[3][j] = (unsigned char) ( (int)gfmultby03(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby02(temp[4*3+j]) );
     }

 }
 void Aes::InvMixColumns()
 {
     unsigned char temp[4*4];
     int i,j;
     for (i = 0; i < 4; i++) // copy State into temp[]
     {
         for (j = 0; j < 4; j++) //0e 0b 0d 09 逆变换矩阵 Page108
         {                                                //09 0e 0b 0d
             temp[4*i+j] = State[i][j];                    //0d 09 0e 0b
         }                                                //0b 0d 09 0e
     }

     for (j = 0; j < 4; j++)
     {
         State[0][j] = (unsigned char) ( (int)gfmultby0e(temp[j]) ^ (int)gfmultby0b(temp[4+j]) ^
             (int)gfmultby0d(temp[4*2+j]) ^ (int)gfmultby09(temp[4*3+j]) );
         State[1][j] = (unsigned char) ( (int)gfmultby09(temp[j]) ^ (int)gfmultby0e(temp[4+j]) ^
             (int)gfmultby0b(temp[4*2+j]) ^ (int)gfmultby0d(temp[4*3+j]) );
         State[2][j] = (unsigned char) ( (int)gfmultby0d(temp[j]) ^ (int)gfmultby09(temp[4+j]) ^
             (int)gfmultby0e(temp[4*2+j]) ^ (int)gfmultby0b(temp[4*3+j]) );
         State[3][j] = (unsigned char) ( (int)gfmultby0b(temp[j]) ^ (int)gfmultby0d(temp[4+j]) ^
             (int)gfmultby09(temp[4*2+j]) ^ (int)gfmultby0e(temp[4*3+j]) );
     }
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 unsigned char Aes::gfmultby01(unsigned char b)
 {
     return b;
 }
 unsigned char Aes::gfmultby02(unsigned char b)
 {
     if (b < 0x80)
         return (unsigned char)(int)(b <<1);
     else
         return (unsigned char)( (int)(b << 1) ^ (int)(0x1b) );
 }

 unsigned char Aes::gfmultby03(unsigned char b)
 {
     return (unsigned char) ( (int)gfmultby02(b) ^ (int)b );
 }

 unsigned char Aes::gfmultby09(unsigned char b)
 {
     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^ (int)b );
 }

 unsigned char Aes::gfmultby0b(unsigned char b)
 {
     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
         (int)gfmultby02(b) ^ (int)b );
 }

 unsigned char Aes::gfmultby0d(unsigned char b)
 {
     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
         (int)gfmultby02(gfmultby02(b)) ^ (int)(b) );
 }

 unsigned char Aes::gfmultby0e(unsigned char b)
 {
     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
         (int)gfmultby02(gfmultby02(b)) ^(int)gfmultby02(b) );
 }

 TAesClass::TAesClass()
 {
     m_lpAes=NULL;
     InitializePrivateKey(16,(unsigned char*)"\x79\x76\x68\x6B\x77\x66\x6E\x68\x72\x65\x73\x63\x6C\x6B\x70\x6E");
 }

 TAesClass::~TAesClass()
 {
     if (m_lpAes!=NULL)
     {
         delete m_lpAes;
     }
 }
 //------------------------------------------------------------------------------------------------------------
 // 编写人员：wfnhddd
 //
 // 函数名称：InitializeAes
 //
 // 函数描述：初始化AES 密钥，密钥用于加密解密
 //
 // 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
 //
 // 返回数值：无
 //
 // 最近修改：2009 年 08 月 07 日
 //------------------------------------------------------------------------------------------------------------


 VOID TAesClass::InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes)
 {
     if (m_lpAes)
     {
         delete m_lpAes;
         m_lpAes=NULL;
     }
     m_lpAes=new Aes(KeySize,KeyBytes);

 }

 //------------------------------------------------------------------------------------------------------------
 // 编写人员：wfnhddd
 //
 // 函数名称：OnAesEncrypt
 //
 // 函数描述：用AES加密算法加密数据
 //
 // 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
 //
 // 返回数值：加密后的数据大小 ，错误返回值 0
 //
 // 最近修改：2009 年 08 月 07 日
 //------------------------------------------------------------------------------------------------------------

 DWORD TAesClass::OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
 {
     DWORD OutLength=0;
     if (m_lpAes==NULL||OutBuffer==NULL)
     {
         return 0;
     }

     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
     long blocknum=InLength/16;
     long leftnum=InLength%16;
     for(long i=0;i<blocknum;i++)
     {
         m_lpAes->Cipher(lpCurInBuff,lpCurOutBuff);
         lpCurInBuff+=16;
         lpCurOutBuff+=16;
         OutLength+=16;
     }
     if(leftnum) //多余出leftnum 字节 则加密时 多出16-leftnum 个字节
     {
         UCHAR inbuff[16];
         memset(inbuff,0,16);
         memcpy(inbuff,lpCurInBuff,leftnum);
         m_lpAes->Cipher(inbuff,lpCurOutBuff);
         lpCurOutBuff+=16;
         OutLength+=16;
     }
                                 //新增16个字节，用以确定增加的字节数
     UCHAR extrabuff[16];
     memset(extrabuff,0,16);
     *((LPDWORD)extrabuff)=16+(16-leftnum)%16; //多出16+(16-leftnum)%16个字节
     m_lpAes->Cipher(extrabuff,lpCurOutBuff);
     OutLength+=16;
     return OutLength;

 }


 //------------------------------------------------------------------------------------------------------------
 // 编写人员：wfnhddd
 //
 // 函数名称：OnAesUncrypt
 //
 // 函数描述：用AES加密算法解密数据
 //
 // 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
 //
 // 返回数值：解密后的数据大小 ，错误返回值 0
 //
 // 最近修改：2009 年 08 月 07 日
 //------------------------------------------------------------------------------------------------------------
 DWORD TAesClass::OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
 {
     DWORD OutLength=0;
     if (m_lpAes==NULL||OutBuffer==NULL)
     {
         return 0;
     }
     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
     long blocknum=InLength/16;
     long leftnum=InLength%16;
         if(leftnum)
     {
                 return 0;
     }
     for(long i=0;i<blocknum;i++)
     {
         m_lpAes->InvCipher(lpCurInBuff,lpCurOutBuff);
         lpCurInBuff+=16;
         lpCurOutBuff+=16;
         OutLength+=16;
     }

     UCHAR *lpExtraInBuff=lpCurOutBuff-16;
     DWORD dwExtraBytes=*((LPDWORD)lpExtraInBuff);
     return (OutLength-dwExtraBytes);

 }