四种加密算法之AES的源码-C++

AES.h文件：

 // Aes1.h: interface for the Aes class.
 //! AES 动态链接库实现   H文件
 /*！
  @author 朱孟斌
  @e-mail  [email protected]
  @version 1.0
  @date 2011-03
  @{
 */
 //////////////////////////////////////////////////////////////////////
 #include <string.h>
 #include <stdio.h>
 #include <Windows.h>
 //!   #能够进行动态链接库编译的AES类
  /*!
        @see class _declspec(dllexport) AES
        将AES算法写成动态链接库的形式方便调用，生成消息使用
  */
 class _declspec(dllexport) AES
 {
 public:
     //! #定义ENUM保存AES密钥的长度
     /*!
         以下这种ENUM保存三个密钥长度的选择
         @see enum ENUM_KeySize_
         @attention 不同长度的密钥对应的加密的字符串长度不同
     */
     typedef enum ENUM_KeySize_
     {
         BIT128 = 0,
         BIT192,
         BIT256
     }ENUM_KEYSIZE;
 public:
     //! #AES的构造函数
     /*!
       @see AES( ENUM_KEYSIZE keysize, BYTE *key )
       @param[ENUM_KEYSIZE] 对密钥长度进行初始化设置
       @param[BYTE] 输入相应的密钥
       其中应该对AES类中的一些变量进行相应的初始化
     */
     AES( ENUM_KEYSIZE keysize, BYTE *key );
     //! #AES的析构函数
     /*!
      @see ~AES(void)
       释放内存
     */
     ~AES(void);
     //! #AES算法中的加密函数模块
     /*!
       @see void Cipher( BYTE *input, BYTE *output );
       @param[in]  input为输入的明文
       @param[out] output为加密之后的密文
       @return[void] 不返回任何值
     */
     void Cipher( BYTE *input, BYTE *output );
     //! #AES算法中的解密函数模块
     /*!
       @see void InvCipher( BYTE *input, BYTE *output );
       @param[in]  input为输入的密文
       @param[in] output为解密之后的明文
       @return[void] 不返回任何值
     */
     void InvCipher( BYTE *input, BYTE *output );
 protected:
     BYTE *RotWord( BYTE *word );
     BYTE *SubWord( BYTE *word );
     void AddRoundKey(int round);
     void SubBytes();
     void InvSubBytes();
     void ShiftRows();
     void InvShiftRows();
     void MixColumns();
     void InvMixColumns();
     static BYTE gfmultby01(BYTE b)  //乘1
     {
         return b;
     }

     static BYTE gfmultby02(BYTE b) //乘2
     {
         if (b < 0x80)
             return (BYTE)(int)(b <<1);
         else
             return (BYTE)( (int)(b << 1) ^ (int)(0x1b) );
     }

     static BYTE gfmultby03(BYTE b)
     {
         return (BYTE) ( (int)gfmultby02(b) ^ (int)b );//GF域的加法运算就是异或
     }

     static BYTE gfmultby09(BYTE b)
     {
         return (BYTE)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
             (int)b );
     }

     static BYTE gfmultby0b(BYTE b)
     {
         return (BYTE)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
             (int)gfmultby02(b) ^
             (int)b );
     }

     static BYTE gfmultby0d(BYTE b)
     {
         return (BYTE)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
             (int)gfmultby02(gfmultby02(b)) ^
             (int)(b) );
     }

     static BYTE gfmultby0e(BYTE b)
     {
         return (BYTE)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
             (int)gfmultby02(gfmultby02(b)) ^
             (int)gfmultby02(b) );
     }
     //! #代表以字为单位的块长
     /*!
     @Brief 代表以字为单位的块长
     */
     int Nb; //
     //! #代表以字为单位的密钥长度
     /*!
     @Brief 代表以字为单位的密钥长度
     */
     int Nk;//
     //! #轮数 ,轮数是10、12或14中的任意一个并且是基于密码分析学理论的
     /*!
     @Brief 轮数 ,轮数是10、12或14中的任意一个并且是基于密码分析学理论的
     @attention 它直接取决于密钥长度
     */
     int Nr;//轮数 ,轮数是10、12或14中的任意一个并且是基于密码分析学理论的。
     //
     //! #the seed key
     /*!
     @Brief   size will be 4 * keySize from ctor
     */
     BYTE *key;//
     typedef struct BYTE4_
     {
         BYTE w[4];
     }BYTE4;
     BYTE4 *w;
     LPBYTE State[4];
     /*
     private byte[,] iSbox;  // inverse Substitution box
     private byte[,] w;      // key schedule array.
     private byte[,] Rcon;   // Round constants.
     private byte[,] State;  // State matrix*/

 };

AES.cpp文件内容：

 // Aes1.cpp: implementation of the Aes class.
 //
 //////////////////////////////////////////////////////////////////////

 //#include "stdafx.h"
 #include "AES.h"
 #include <stdio.h>
 #include <Windows.h>
 #include <string.h>

 const BYTE Sbox[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}
 };

 const BYTE iSbox[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} };
     const BYTE Rcon[11][4] = { {0x00, 0x00, 0x00, 0x00},  //轮常数表
     {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} };
     BYTE * AES::RotWord( BYTE *word )//左旋一位
     {
         BYTE *result = new BYTE [4];
         result[0] = word[1];
         result[1] = word[2];
         result[2] = word[3];
         result[3] = word[0];
         delete[] word;
         return result;
     };
     BYTE *AES::SubWord( BYTE *word )  //用替换表 Sbox 对一给定的一行密钥调度表 w[] 进行逐字节替换。
     {
         BYTE *result = new BYTE[4];
         result[0] = Sbox[ word[0] >> 4][ word[0] & 0x0f ];
         result[1] = Sbox[ word[1] >> 4][ word[1] & 0x0f ];
         result[2] = Sbox[ word[2] >> 4][ word[2] & 0x0f ];
         result[3] = Sbox[ word[3] >> 4][ word[3] & 0x0f ];
         delete[] word;
         return result;
     }
     AES::AES( ENUM_KEYSIZE keysize, BYTE *key )
     {

         this->Nb = 4;
         switch( keysize )
         {
         case AES::BIT128:
             this->Nk = 4;
             this->Nr = 10;
             break;
         case AES::BIT192:
             this->Nk = 6;
             this->Nr = 12;
             break;
         case AES::BIT256:
         default:
             this->Nk = 8;
             this->Nr = 14;
             break;
         }
         this->key = new BYTE[this->Nk * 4];
         memcpy( this->key, key, this->Nk * 4 );
         this->w = new BYTE4[Nb * (Nr+1)];   //w[]为密钥调度表
         //w[] 最初的 Nk (6) 行被作为种子，用原始密钥值
         int row;
         for(row = 0; row < Nk; ++row )
         {
             w[row].w[0] = this->key[4*row];
             w[row].w[1] = this->key[4*row+1];
             w[row].w[2] = this->key[4*row+2];
             w[row].w[3] = this->key[4*row+3];
         }
         BYTE *temp = new BYTE[4];
         for(  row = Nk; row < Nb *(Nr + 1); ++ row )
         {
             temp[0] = this->w[row-1].w[0];
             temp[1] = this->w[row-1].w[1];
             temp[2] = this->w[row-1].w[2];
             temp[3] = this->w[row-1].w[3];
             if (row % Nk == 0)
             {
                 temp = SubWord(RotWord(temp));//this change two size
                 temp[0] = (BYTE)( (int)temp[0] ^ (int)Rcon[row/Nk][0] );
                 temp[1] = (BYTE)( (int)temp[1] ^ (int)Rcon[row/Nk][1] );
                 temp[2] = (BYTE)( (int)temp[2] ^ (int)Rcon[row/Nk][2] );
                 temp[3] = (BYTE)( (int)temp[3] ^ (int)Rcon[row/Nk][3] );
             }
             else if ( Nk > 6 && (row % Nk == 4) )
             {
                 temp = SubWord(temp);
             }

             // w[row] = w[row-Nk] xor temp
             this->w[row].w[0] = (BYTE) ( (int)this->w[row-Nk].w[0] ^ (int)temp[0] );
             this->w[row].w[1] = (BYTE) ( (int)this->w[row-Nk].w[1] ^ (int)temp[1] );
             this->w[row].w[2] = (BYTE) ( (int)this->w[row-Nk].w[2] ^ (int)temp[2] );
             this->w[row].w[3] = (BYTE) ( (int)this->w[row-Nk].w[3] ^ (int)temp[3] );
         }//loop
         delete[] temp;
         for(int i=0;i<4;i++)
         {
             this->State[i] = NULL;
         }
     }

     AES::~AES(void)
     {
         for(int i=0;i<4;i++)
         {
             if (this->State[i] != NULL)
             {
                 delete []this->State[i];
             }
         }
     }
     void AES::Cipher( BYTE *input, BYTE *output )
     {
         if (this->State[0] == NULL)
         {
             for(int i=0;i<4;i++)
             {
                 this->State[i] = new BYTE[this->Nb];
             }
         }
         int i;
         for (i = 0; i < (4 * Nb); ++i)
         {
             this->State[i%4][i/4] = input[i];
         }
         AddRoundKey(0);

         for (int round = 1; round <= (Nr - 1); ++round)  // main round loop
         {
             SubBytes();
             ShiftRows();
             MixColumns();
             AddRoundKey(round);
         }  // main round loop

         SubBytes();
         ShiftRows();
         AddRoundKey(Nr);

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

     void AES::InvCipher( BYTE *input, BYTE *output )
     {
         int i;
         if (this->State[0] == NULL)
         {
             for(i=0;i<4;i++)
             {
                 this->State[i] = new BYTE[this->Nb];
             }
         }

         for (i = 0; i < (4 * Nb); ++i)
         {
             this->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 ( i = 0; i < (4 * Nb); ++i)
         {
             output[i] = this->State[i % 4][ i / 4];
         }
     }
     void AES::AddRoundKey( int round )
     {
         for (int r = 0; r < 4; ++r)
         {
             for (int c = 0; c < 4; ++c)
             {
                 this->State[r][c] = (BYTE) ( (int)this->State[r][c] ^ (int)w[(round*4)+c].w[r] );
             }
         }
     }

     void AES::SubBytes()
     {
         for (int r = 0; r < 4; ++r)
         {
             for (int c = 0; c < 4; ++c)
             {
                 this->State[r][c] = Sbox[ (this->State[r][c] >> 4)][ (this->State[r][c] & 0x0f) ];
             }
         }
     }
     void AES::InvSubBytes()
     {
         for (int r = 0; r < 4; ++r)
         {
             for (int c = 0; c < 4; ++c)
             {
                 this->State[r][c] = iSbox[ (this->State[r][c] >> 4)][ (this->State[r][c] & 0x0f) ];
             }
         }
     }
     void AES::ShiftRows()
     {
         BYTE4 temp[4];
         //  byte[,] temp = new byte[4,4];
         int r;
         for (r = 0; r < 4; ++r)  // copy State into temp[]
         {
             for (int c = 0; c < 4; ++c)
             {
                 temp[r].w[c] = this->State[r][c];
                 // temp[r,c] = this.State[r,c];
             }
         }

         for ( r = 1; r < 4; ++r)  // shift temp into State
         {
             for (int c = 0; c < 4; ++c)
             {
                 this->State[r][c] = temp[ r].w[ (c + r) % Nb ];
             }
         }
     }  // ShiftRows()
     void AES::InvShiftRows()
     {
         int r;
         BYTE4 temp[4];
         for (r = 0; r < 4; ++r)  // copy State into temp[]
         {
             for (int c = 0; c < 4; ++c)
             {
                 temp[r].w[c] = this->State[r][c];
             }
         }
         for ( r = 1; r < 4; ++r)  // shift temp into State
         {
             for (int c = 0; c < 4; ++c)
             {
                 this->State[r][ (c + r) % Nb ] = temp[r].w[c];
             }
         }
     }  // InvShiftRows()
     void AES::MixColumns()
     {
         BYTE4 temp[4];
         for (int r = 0; r < 4; ++r)  // copy State into temp[]
         {
             for (int c = 0; c < 4; ++c)
             {
                 temp[r].w[c] = this->State[r][c];
             }
         }

         for (int c = 0; c < 4; ++c)
         {
             this->State[0][c] = (BYTE) ( (int)gfmultby02(temp[0].w[c]) ^ (int)gfmultby03(temp[1].w[c]) ^
                 (int)gfmultby01(temp[2].w[c]) ^ (int)gfmultby01(temp[3].w[c]) );
             this->State[1][c] = (BYTE) ( (int)gfmultby01(temp[0].w[c]) ^ (int)gfmultby02(temp[1].w[c]) ^
                 (int)gfmultby03(temp[2].w[c]) ^ (int)gfmultby01(temp[3].w[c]) );
             this->State[2][c] = (BYTE) ( (int)gfmultby01(temp[0].w[c]) ^ (int)gfmultby01(temp[1].w[c]) ^
                 (int)gfmultby02(temp[2].w[c]) ^ (int)gfmultby03(temp[3].w[c]) );
             this->State[3][c] = (BYTE) ( (int)gfmultby03(temp[0].w[c]) ^ (int)gfmultby01(temp[1].w[c]) ^
                 (int)gfmultby01(temp[2].w[c]) ^ (int)gfmultby02(temp[3].w[c]) );
         }
     }  // MixColumns
     void AES::InvMixColumns()
     {
         BYTE4 temp[4];
         for (int r = 0; r < 4; ++r)  // copy State into temp[]
         {
             for (int c = 0; c < 4; ++c)
             {
                 temp[r].w[c] = this->State[r][c];
             }
         }

         for (int c = 0; c < 4; ++c)
         {
             this->State[0][c] = (BYTE) ( (int)gfmultby0e(temp[0].w[c]) ^ (int)gfmultby0b(temp[1].w[c]) ^
                 (int)gfmultby0d(temp[2].w[c]) ^ (int)gfmultby09(temp[3].w[c]) );
             this->State[1][c] = (BYTE) ( (int)gfmultby09(temp[0].w[c]) ^ (int)gfmultby0e(temp[1].w[c]) ^
                 (int)gfmultby0b(temp[2].w[c]) ^ (int)gfmultby0d(temp[3].w[c]) );
             this->State[2][c] = (BYTE) ( (int)gfmultby0d(temp[0].w[c]) ^ (int)gfmultby09(temp[1].w[c]) ^
                 (int)gfmultby0e(temp[2].w[c]) ^ (int)gfmultby0b(temp[3].w[c]) );
             this->State[3][c] = (BYTE) ( (int)gfmultby0b(temp[0].w[c]) ^ (int)gfmultby0d(temp[1].w[c]) ^
                 (int)gfmultby09(temp[2].w[c]) ^ (int)gfmultby0e(temp[3].w[c]) );
         }
     }