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)：
main.cpp
1 int main(int argc, char *argv[]) 2 { 3 QCoreApplication a(argc, argv); 4 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 15 16 //打印信息 17 qDebug() << "mingwen:" << mingwen; 18 qDebug() << "miwen:" << miwen; 19 qDebug() << "jiemi:" <<jiemi; 20 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"Ò æ7þ†³¡»qŠ 2 ·EMÌT<ì(c@öaéGÜE®¿Ž2G
jiemi: cheng xiaopeng
TAesClass.h的源代码
1 #include <string.h> 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <ctype.h> 5 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; 11 12 #ifndef VOID 13 #define VOID void 14 #endif 15 16 //#pragma once 17 18 //enum KeySize { Bits128, Bits192, Bits256 }; // key size, in bits, for construtor 19 #define Bits128 16 20 #define Bits192 24 21 #define Bits256 32 22 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 }; 43 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 }; 79 80 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 加密16-bit的输入 89 void InvCipher(unsigned char* input, unsigned char* output); // decipher 16-bit input 解密16-bit的输入 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. 94 95 unsigned char key[32]; 96 unsigned char w[16*15]; 97 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 }; 118 119 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
#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); }
