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Qt使用AES加密算法对字符串进行加密

2024-11-12 17:50:02   205人阅读

 
    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®¿?2G

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*)"\x79\x76\x68\x6B\x77\x66\x6E\x68\x72\x65\x73\x63\x6C\x6B\x70\x6E");
  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. }

Qt使用AES加密算法对字符串进行加密


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