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分类: C/C++

2016-03-07 12:35:46

    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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  1. int main(int argc, char *argv[])
  2. {
  3.     QCoreApplication a(argc, argv);

  4.     TAesClass *aes = new TAesClass;
  5.     char mingwen[1024] = "cheng xiaopeng";
  6.     DWORD size = strlen(mingwen);
  7.     char miwen[1024];
  8.     char jiemi[1024];
  9.     UCHAR key[1024] = "xcy";
  10.     UCHAR *p = key;
  11.     aes->InitializePrivateKey(16, p); //进行初始化
  12.     aes->OnAesEncrypt((LPVOID)mingwen, size, (LPVOID)miwen); //进行加密
  13.     aes->OnAesUncrypt((LPVOID)miwen, (DWORD)sizeof(miwen),(LPVOID)jiemi); //进行解密

  14.     //打印信息
  15.     qDebug() << "mingwen:" << mingwen;
  16.     qDebug() << "miwen:" << miwen;
  17.     qDebug() << "jiemi:" <<jiemi;

  18.     free(aes);
  19.     aes = 0;
  20.     return a.exec();
  21. }
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>

  5. typedef unsigned long DWORD;
  6. typedef unsigned char UCHAR,*PUCHAR;
  7. typedef void *PVOID,*LPVOID;
  8. typedef unsigned char byte;
  9. typedef DWORD *PDWORD,*LPDWORD;

  10. #ifndef VOID
  11. #define VOID void
  12. #endif

  13. //#pragma once

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

  18. static unsigned char AesSbox[16*16]=
  19. {// populate the Sbox matrix
  20.     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
  21.     /*0*/ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
  22.     /*1*/ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
  23.     /*2*/ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
  24.     /*3*/ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
  25.     /*4*/ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
  26.     /*5*/ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
  27.     /*6*/ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
  28.     /*7*/ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
  29.     /*8*/ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
  30.     /*9*/ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
  31.     /*a*/ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
  32.     /*b*/ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
  33.     /*c*/ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
  34.     /*d*/ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
  35.     /*e*/ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
  36.     /*f*/ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
  37. };

  38. static unsigned char AesiSbox[16*16]=
  39. {
  40.     // populate the iSbox matrix
  41.     /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
  42.     /*0*/ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
  43.     /*1*/ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
  44.     /*2*/ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
  45.     /*3*/ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
  46.     /*4*/ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
  47.     /*5*/ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
  48.     /*6*/ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
  49.     /*7*/ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
  50.     /*8*/ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
  51.     /*9*/ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
  52.     /*a*/ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
  53.     /*b*/ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
  54.     /*c*/ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
  55.     /*d*/ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
  56.     /*e*/ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
  57.     /*f*/ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
  58. };
  59. static unsigned char AesRcon[11*4]=
  60. {
  61.     0x00, 0x00, 0x00, 0x00,
  62.         0x01, 0x00, 0x00, 0x00,
  63.         0x02, 0x00, 0x00, 0x00,
  64.         0x04, 0x00, 0x00, 0x00,
  65.         0x08, 0x00, 0x00, 0x00,
  66.         0x10, 0x00, 0x00, 0x00,
  67.         0x20, 0x00, 0x00, 0x00,
  68.         0x40, 0x00, 0x00, 0x00,
  69.         0x80, 0x00, 0x00, 0x00,
  70.         0x1b, 0x00, 0x00, 0x00,
  71.         0x36, 0x00, 0x00, 0x00
  72. };


  73. class Aes // Advanced Encryption Standard
  74. {
  75. public:
  76.     ~Aes();
  77.     Aes();
  78.     Aes(int keySize, unsigned char* keyBytes);
  79.     unsigned char State[4][4];
  80.     void Cipher(unsigned char* input, unsigned char* output); // encipher 16-bit input
  81.     void InvCipher(unsigned char* input, unsigned char* output); // decipher 16-bit input
  82. private:
  83.     int Nb; // block size in 32-bit words. Always 4 for AES. (128 bits).
  84.     int Nk; // key size in 32-bit words. 4, 6, 8. (128, 192, 256 bits).
  85.     int Nr; // number of rounds. 10, 12, 14.

  86.     unsigned char key[32];
  87.     unsigned char w[16*15];

  88.     void SetNbNkNr(int keySize);
  89.     void AddRoundKey(int round); //轮密钥加
  90.     void SubBytes(); //S盒字节代换
  91.     void InvSubBytes(); //逆S盒字节代换
  92.     void ShiftRows(); //行移位
  93.     void InvShiftRows();
  94.     void MixColumns(); //列混淆
  95.     void InvMixColumns();
  96.     unsigned char gfmultby01(unsigned char b);
  97.     unsigned char gfmultby02(unsigned char b);
  98.     unsigned char gfmultby03(unsigned char b);
  99.     unsigned char gfmultby09(unsigned char b);
  100.     unsigned char gfmultby0b(unsigned char b);
  101.     unsigned char gfmultby0d(unsigned char b);
  102.     unsigned char gfmultby0e(unsigned char b);
  103.     void KeyExpansion(); //密钥扩展
  104.     unsigned char* SubWord(unsigned char* word); //密钥S盒字代换
  105.     unsigned char* RotWord(unsigned char* word); //密钥移位
  106.     
  107. };

  108. class TAesClass
  109. {
  110. public:
  111.     TAesClass();
  112.     ~TAesClass();
  113.   void InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes); //AES 密钥初始化
  114.     DWORD OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 加密数据
  115.     DWORD OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer);            //AES 解密数据
  116. private:
  117.     Aes * m_lpAes;
  118. };
TAesClass.cpp的源代码

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  1. #include "TAesClass.h"

  2. Aes::~Aes()
  3. {

  4. }
  5. Aes::Aes()
  6. {

  7. }
  8. ////////////////////////////////////////////////////////////////////////////////////////////////
  9. //构造函数
  10. Aes::Aes(int keysize,unsigned char* keyBytes)
  11. {
  12.     SetNbNkNr(keysize); //设置密钥块数,轮数
  13.     memcpy(key,keyBytes,keysize);                //字符串拷贝函数,把keyBytes的keysize个字符复制到key中
  14.     KeyExpansion();                                //密钥扩展,必须提前做的初始化
  15. }
  16. ////////////////////////////////////////////////////////////////////////////////////////////////
  17. void Aes::SetNbNkNr(int keySize)
  18. {
  19.     Nb=4;
  20.     if(keySize==Bits128)
  21.     {
  22.         Nk=4; //4*4字节,128位密钥,10轮加密
  23.         Nr=10;
  24.     }
  25.     else if(keySize==Bits192)
  26.     {
  27.         Nk=6; //6*4字节,192位密钥,12轮加密
  28.         Nr=12;
  29.     }
  30.     else if(keySize==Bits256)
  31.     {
  32.         Nk=8; //8*4字节,256位密钥,14轮加密
  33.         Nr=14;
  34.     }
  35. }
  36. ////////////////////////////////////////////////////////////////////////////////////////////////
  37. void Aes::KeyExpansion()
  38. {

  39.     memset(w,0,16*15);
  40.     for(int row=0;row<Nk;row++) //拷贝seed 密钥
  41.     {
  42.         w[4*row+0] = key[4*row];
  43.         w[4*row+1] = key[4*row+1];
  44.         w[4*row+2] = key[4*row+2];
  45.         w[4*row+3] = key[4*row+3];
  46.     }
  47.     byte* temp = new byte[4];
  48.     for(int row=Nk;row<4*(Nr+1);row++)
  49.     {
  50.         temp[0]=w[4*row-4]; //当前列的前一列
  51.         temp[1]=w[4*row-3];
  52.         temp[2]=w[4*row-2];
  53.         temp[3]=w[4*row-1];
  54.         if(row%Nk==0) //逢nk时,对当前列的前一列作特殊处理
  55.         {
  56.             temp=SubWord(RotWord(temp)); //先移位,再代换,最后和轮常量异或
  57.             temp[0] = (byte)( (int)temp[0] ^ (int) AesRcon[4*(row/Nk)+0] );
  58.             temp[1] = (byte)( (int)temp[1] ^ (int) AesRcon[4*(row/Nk)+1] );
  59.             temp[2] = (byte)( (int)temp[2] ^ (int) AesRcon[4*(row/Nk)+2] );
  60.             temp[3] = (byte)( (int)temp[3] ^ (int) AesRcon[4*(row/Nk)+3] );
  61.         }
  62.         else if ( Nk > 6 && (row % Nk == 4) ) //这个还没有搞清楚
  63.         {
  64.             temp = SubWord(temp);
  65.         }

  66.         // w[row] = w[row-Nk] xor temp
  67.         w[4*row+0] = (byte) ( (int) w[4*(row-Nk)+0] ^ (int)temp[0] );
  68.         w[4*row+1] = (byte) ( (int) w[4*(row-Nk)+1] ^ (int)temp[1] );
  69.         w[4*row+2] = (byte) ( (int) w[4*(row-Nk)+2] ^ (int)temp[2] );
  70.         w[4*row+3] = (byte) ( (int) w[4*(row-Nk)+3] ^ (int)temp[3] );
  71.     } // for loop

  72. }
  73. ////////////////////////////////////////////////////////////////////////////////////////////////
  74. //密钥移位函数
  75. unsigned char* Aes::RotWord(unsigned char* word)
  76. {
  77.     byte* temp = new byte[4];
  78.     temp[0] = word[1];
  79.     temp[1] = word[2];
  80.     temp[2] = word[3];
  81.     temp[3] = word[0];
  82.     return temp;
  83. }
  84. ////////////////////////////////////////////////////////////////////////////////////////////////
  85. //密钥字代换函数
  86. unsigned char* Aes::SubWord(unsigned char* word)
  87. {
  88.     byte* temp = new byte[4];
  89.     for(int j=0;j<4;j++)
  90.     {
  91.         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
  92.     }
  93.     return temp;

  94. }
  95. ////////////////////////////////////////////////////////////////////////////////////////////////
  96. //Aes加密函数
  97. void Aes::Cipher(unsigned char* input, unsigned char* output)
  98. {
  99.     memset(&State[0][0],0,16);
  100.     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
  101.     {
  102.         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
  103.     }
  104.     AddRoundKey(0);                                    //轮密钥加

  105.     for (int round = 1; round <= (Nr - 1); round++) // main round loop
  106.     {
  107.         SubBytes();                                    //字节代换
  108.         ShiftRows();                                //行移位
  109.         MixColumns();                                //列混淆
  110.         AddRoundKey(round);                            //轮密钥加
  111.     } // main round loop

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

  115.     // output = state
  116.     for (int i = 0; i < (4 * Nb); i++)
  117.     {
  118.         output[i] = State[i % 4][ i / 4];
  119.     }

  120. }
  121. ////////////////////////////////////////////////////////////////////////////////////////////////
  122. //Aes解密函数
  123. void Aes::InvCipher(unsigned char* input,unsigned char* output)
  124. {
  125.     memset(&State[0][0],0,16);
  126.     for (int i = 0; i < (4 * Nb); i++)
  127.     {
  128.         State[i % 4][ i / 4] = input[i];
  129.     }

  130.     AddRoundKey(Nr);

  131.     for (int round = Nr-1; round >= 1; round--) // main round loop
  132.     {
  133.         InvShiftRows();
  134.         InvSubBytes();
  135.         AddRoundKey(round);
  136.         InvMixColumns();
  137.     } // end main round loop for InvCipher

  138.     InvShiftRows();
  139.     InvSubBytes();
  140.     AddRoundKey(0);

  141.     // output = state
  142.     for (int i = 0; i < (4 * Nb); i++)
  143.     {
  144.         output[i] = State[i % 4][ i / 4];
  145.     }
  146. }
  147. ////////////////////////////////////////////////////////////////////////////////////////////////
  148. //轮密钥加
  149. void Aes::AddRoundKey(int round)
  150. {
  151.     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
  152.     for(j=0;j<4;j++)             //                             k1 k5 k9 k13
  153.     {                             //                             k2 k6 k10k14
  154.         for(i=0;i<4;i++)         //                             k3 k7 k11k15
  155.         {                         // 所以i行j列的下标是4*((round*4)+j)+i即16*round+4*j+i
  156.             State[i][j]=(unsigned char)((int)State[i][j]^(int)w[4*((round*4)+j)+i]);
  157.         }
  158.     }
  159. }
  160. ////////////////////////////////////////////////////////////////////////////////////////////////
  161. //字节代换函数
  162. void Aes::SubBytes() //Page 103
  163. {
  164.     int i,j;
  165.     for(j=0;j<4;j++)
  166.     {
  167.         for(i=0;i<4;i++)
  168.         {
  169.             State[i][j]=AesSbox[State[i][j]];
  170.             //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]


  171.         }
  172.     }
  173. }

  174. void Aes::InvSubBytes()
  175. {
  176.     int i,j;
  177.     for(j=0;j<4;j++)
  178.     {
  179.         for(i=0;i<4;i++)
  180.         {
  181.             State[i][j]=AesiSbox[State[i][j]]; //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]
  182.         }
  183.     }

  184. }
  185. ////////////////////////////////////////////////////////////////////////////////////////////////
  186. void Aes::ShiftRows()
  187. {
  188.     unsigned char temp[4*4]; //Page105
  189.     int i,j;
  190.     for(j=0;j<4;j++)
  191.     {
  192.         for(i=0;i<4;i++)
  193.         {
  194.             temp[4*i+j]=State[i][j];
  195.         }
  196.     }
  197.     for(i=1;i<4;i++)
  198.     {
  199.         for(j=0;j<4;j++)
  200.         {
  201.             if(i==1)State[i][j]=temp[4*i+(j+1)%4];                    //第一行左移1位
  202.             else if(i==2)State[i][j]=temp[4*i+(j+2)%4];                //第二行左移2位
  203.             else if(i==3)State[i][j]=temp[4*i+(j+3)%4];                //第三行左移3位
  204.         }
  205.     }

  206. }
  207. void Aes::InvShiftRows()
  208. {
  209.     unsigned char temp[4*4];
  210.     int i,j;
  211.     for(j=0;j<4;j++)
  212.     {
  213.         for(i=0;i<4;i++)
  214.         {
  215.             temp[4*i+j]=State[i][j];
  216.         }
  217.     }
  218.     for(i=1;i<4;i++)
  219.     {
  220.         for(j=0;j<4;j++)
  221.         {
  222.             //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
  223.             if(i==1)State[i][j]=temp[4*i+(j+3)%4];            //第一行右移1位 j-1+4=j+3
  224.             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
  225.             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
  226.         }
  227.     }

  228. }
  229. ////////////////////////////////////////////////////////////////////////////////////////////////
  230. void Aes::MixColumns()
  231. {
  232.     unsigned char temp[4*4];
  233.     int i,j;
  234.     for(j=0;j<4;j++) //2 3 1 1 列混淆矩阵 Page107
  235.     {                                                    //1 2 3 1
  236.         for(i=0;i<4;i++)                                //1 1 2 3
  237.         {                                                //3 1 1 2
  238.             temp[4*i+j]=State[i][j];
  239.         }
  240.     }
  241.     for(j=0;j<4;j++)
  242.     {
  243.         State[0][j] = (unsigned char) ( (int)gfmultby02(temp[0+j]) ^ (int)gfmultby03(temp[4*1+j]) ^
  244.             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
  245.         State[1][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby02(temp[4*1+j]) ^
  246.             (int)gfmultby03(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
  247.         State[2][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
  248.             (int)gfmultby02(temp[4*2+j]) ^ (int)gfmultby03(temp[4*3+j]) );
  249.         State[3][j] = (unsigned char) ( (int)gfmultby03(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
  250.             (int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby02(temp[4*3+j]) );
  251.     }

  252. }
  253. void Aes::InvMixColumns()
  254. {
  255.     unsigned char temp[4*4];
  256.     int i,j;
  257.     for (i = 0; i < 4; i++) // copy State into temp[]
  258.     {
  259.         for (j = 0; j < 4; j++) //0e 0b 0d 09 逆变换矩阵 Page108
  260.         {                                                //09 0e 0b 0d
  261.             temp[4*i+j] = State[i][j];                    //0d 09 0e 0b
  262.         }                                                //0b 0d 09 0e
  263.     }

  264.     for (j = 0; j < 4; j++)
  265.     {
  266.         State[0][j] = (unsigned char) ( (int)gfmultby0e(temp[j]) ^ (int)gfmultby0b(temp[4+j]) ^
  267.             (int)gfmultby0d(temp[4*2+j]) ^ (int)gfmultby09(temp[4*3+j]) );
  268.         State[1][j] = (unsigned char) ( (int)gfmultby09(temp[j]) ^ (int)gfmultby0e(temp[4+j]) ^
  269.             (int)gfmultby0b(temp[4*2+j]) ^ (int)gfmultby0d(temp[4*3+j]) );
  270.         State[2][j] = (unsigned char) ( (int)gfmultby0d(temp[j]) ^ (int)gfmultby09(temp[4+j]) ^
  271.             (int)gfmultby0e(temp[4*2+j]) ^ (int)gfmultby0b(temp[4*3+j]) );
  272.         State[3][j] = (unsigned char) ( (int)gfmultby0b(temp[j]) ^ (int)gfmultby0d(temp[4+j]) ^
  273.             (int)gfmultby09(temp[4*2+j]) ^ (int)gfmultby0e(temp[4*3+j]) );
  274.     }
  275. }
  276. ////////////////////////////////////////////////////////////////////////////////////////////////
  277. unsigned char Aes::gfmultby01(unsigned char b)
  278. {
  279.     return b;
  280. }
  281. unsigned char Aes::gfmultby02(unsigned char b)
  282. {
  283.     if (b < 0x80)
  284.         return (unsigned char)(int)(b <<1);
  285.     else
  286.         return (unsigned char)( (int)(b << 1) ^ (int)(0x1b) );
  287. }

  288. unsigned char Aes::gfmultby03(unsigned char b)
  289. {
  290.     return (unsigned char) ( (int)gfmultby02(b) ^ (int)b );
  291. }

  292. unsigned char Aes::gfmultby09(unsigned char b)
  293. {
  294.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^ (int)b );
  295. }

  296. unsigned char Aes::gfmultby0b(unsigned char b)
  297. {
  298.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
  299.         (int)gfmultby02(b) ^ (int)b );
  300. }

  301. unsigned char Aes::gfmultby0d(unsigned char b)
  302. {
  303.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
  304.         (int)gfmultby02(gfmultby02(b)) ^ (int)(b) );
  305. }

  306. unsigned char Aes::gfmultby0e(unsigned char b)
  307. {
  308.     return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
  309.         (int)gfmultby02(gfmultby02(b)) ^(int)gfmultby02(b) );
  310. }

  311. TAesClass::TAesClass()
  312. {
  313.     m_lpAes=NULL;
  314.     InitializePrivateKey(16,(unsigned char*)"\x79\x76\x68\x6B\x77\x66\x6E\x68\x72\x65\x73\x63\x6C\x6B\x70\x6E");
  315. }

  316. TAesClass::~TAesClass()
  317. {
  318.     if (m_lpAes!=NULL)
  319.     {
  320.         delete m_lpAes;
  321.     }
  322. }
  323. //------------------------------------------------------------------------------------------------------------
  324. // 编写人员:wfnhddd
  325. //
  326. // 函数名称:InitializeAes
  327. //
  328. // 函数描述:初始化AES 密钥,密钥用于加密解密
  329. //
  330. // 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
  331. //
  332. // 返回数值:无
  333. //
  334. // 最近修改:2009 年 08 月 07 日
  335. //------------------------------------------------------------------------------------------------------------


  336. VOID TAesClass::InitializePrivateKey(DWORD KeySize,UCHAR *KeyBytes)
  337. {
  338.     if (m_lpAes)
  339.     {
  340.         delete m_lpAes;
  341.         m_lpAes=NULL;
  342.     }
  343.     m_lpAes=new Aes(KeySize,KeyBytes);

  344. }

  345. //------------------------------------------------------------------------------------------------------------
  346. // 编写人员:wfnhddd
  347. //
  348. // 函数名称:OnAesEncrypt
  349. //
  350. // 函数描述:用AES加密算法加密数据
  351. //
  352. // 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
  353. //
  354. // 返回数值:加密后的数据大小 ,错误返回值 0
  355. //
  356. // 最近修改:2009 年 08 月 07 日
  357. //------------------------------------------------------------------------------------------------------------

  358. DWORD TAesClass::OnAesEncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
  359. {
  360.     DWORD OutLength=0;
  361.     if (m_lpAes==NULL||OutBuffer==NULL)
  362.     {
  363.         return 0;
  364.     }
  365.     
  366.     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
  367.     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
  368.     long blocknum=InLength/16;
  369.     long leftnum=InLength%16;
  370.     for(long i=0;i<blocknum;i++)
  371.     {        
  372.         m_lpAes->Cipher(lpCurInBuff,lpCurOutBuff);
  373.         lpCurInBuff+=16;
  374.         lpCurOutBuff+=16;
  375.         OutLength+=16;        
  376.     }
  377.     if(leftnum) //多余出leftnum 字节 则加密时 多出16-leftnum 个字节
  378.     {
  379.         UCHAR inbuff[16];
  380.         memset(inbuff,0,16);
  381.         memcpy(inbuff,lpCurInBuff,leftnum);
  382.         m_lpAes->Cipher(inbuff,lpCurOutBuff);
  383.         lpCurOutBuff+=16;
  384.         OutLength+=16;
  385.     }
  386.                                 //新增16个字节,用以确定增加的字节数
  387.     UCHAR extrabuff[16];
  388.     memset(extrabuff,0,16);
  389.     *((LPDWORD)extrabuff)=16+(16-leftnum)%16; //多出16+(16-leftnum)%16个字节
  390.     m_lpAes->Cipher(extrabuff,lpCurOutBuff);
  391.     OutLength+=16;
  392.     return OutLength;

  393. }


  394. //------------------------------------------------------------------------------------------------------------
  395. // 编写人员:wfnhddd
  396. //
  397. // 函数名称:OnAesUncrypt
  398. //
  399. // 函数描述:用AES加密算法解密数据
  400. //
  401. // 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
  402. //
  403. // 返回数值:解密后的数据大小 ,错误返回值 0
  404. //
  405. // 最近修改:2009 年 08 月 07 日
  406. //------------------------------------------------------------------------------------------------------------
  407. DWORD TAesClass::OnAesUncrypt(LPVOID InBuffer,DWORD InLength,LPVOID OutBuffer)
  408. {
  409.     DWORD OutLength=0;
  410.     if (m_lpAes==NULL||OutBuffer==NULL)
  411.     {
  412.         return 0;
  413.     }
  414.     UCHAR *lpCurInBuff=(UCHAR *)InBuffer;
  415.     UCHAR *lpCurOutBuff=(UCHAR *)OutBuffer;
  416.     long blocknum=InLength/16;
  417.     long leftnum=InLength%16;
  418.         if(leftnum)
  419.     {
  420.                 return 0;
  421.     }
  422.     for(long i=0;i<blocknum;i++)
  423.     {        
  424.         m_lpAes->InvCipher(lpCurInBuff,lpCurOutBuff);
  425.         lpCurInBuff+=16;
  426.         lpCurOutBuff+=16;
  427.         OutLength+=16;        
  428.     }

  429.     UCHAR *lpExtraInBuff=lpCurOutBuff-16;
  430.     DWORD dwExtraBytes=*((LPDWORD)lpExtraInBuff);    
  431.     return (OutLength-dwExtraBytes);

  432. }

 testAES.rar  



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