c++实现aes加密算法，对字符串进行加密 - Go语言中文社区

c++实现aes加密算法，对字符串进行加密

 我的blog中，已经写过一篇关于aes加密算法的调用。不过使用的参数必须时unsigned char类型。我们在
编程中使用最多的char类型，我从网上下载了一个代码，追加了一部分代码。
    其主要功能进行实现unsigned char类型数据到char类型转化，将unsigned char结果与16进制字符串串之间的转化。代码如下：

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  1. #ifndef AES_H
  2. #define AES_H

  4. #include <string.h>

  6. class AES
  7. {
  8. public:
  9.   AES(unsigned char* key);
  10.   virtual ~AES();
  11.   unsigned char* Cipher(unsigned char* input);
  12.   unsigned char* InvCipher(unsigned char* input);
  13.   void* Cipher(void* input, int length=0);
  14.   void* InvCipher(void* input, int length);

  16.   void Cipher(char *input, char *output);
  17.   void InvCipher(char *inut, char *output);

  19. private:
  20.   unsigned char Sbox[256];
  21.   unsigned char InvSbox[256];
  22.   unsigned char w[11][4][4];

  24.   void KeyExpansion(unsigned char* key, unsigned char w[][4][4]);
  25.   unsigned char FFmul(unsigned char a, unsigned char b);

  27.   void SubBytes(unsigned char state[][4]);
  28.   void ShiftRows(unsigned char state[][4]);
  29.   void MixColumns(unsigned char state[][4]);
  30.   void AddRoundKey(unsigned char state[][4], unsigned char k[][4]);

  32.   void InvSubBytes(unsigned char state[][4]);
  33.   void InvShiftRows(unsigned char state[][4]);
  34.   void InvMixColumns(unsigned char state[][4]);

  36.   int strToHex(const char *ch, char *hex);
  37.   int hexToStr(const char *hex, char *ch);
  38.   int ascillToValue(const char ch);
  39.   char valueToHexCh(const int value);
  40.   int getUCharLen(const unsigned char *uch);
  41.   int strToUChar(const char *ch, unsigned char *uch);
  42.   int ucharToStr(const unsigned char *uch, char *ch);
  43.   int ucharToHex(const unsigned char *uch, char *hex);
  44.   int hexToUChar(const char *hex, unsigned char *uch);
  45. };

  47. #endif // AES_H
对应的cpp文件如下：

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  1. #include "aes.h"

  3. AES::AES(unsigned char* key)
  4. {
  5.   unsigned char sBox[] =
  6.   { /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
  7.     0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76, /*0*/
  8.     0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0, /*1*/
  9.     0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15, /*2*/
  10.     0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75, /*3*/
  11.     0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84, /*4*/
  12.     0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf, /*5*/
  13.     0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8, /*6*/
  14.     0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2, /*7*/
  15.     0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73, /*8*/
  16.     0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb, /*9*/
  17.     0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79, /*a*/
  18.     0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08, /*b*/
  19.     0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a, /*c*/
  20.     0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e, /*d*/
  21.     0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf, /*e*/
  22.     0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16 /*f*/
  23.   };
  24.   unsigned char invsBox[256] =
  25.   { /* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
  26.     0x52,0x09,0x6a,0xd5,0x30,0x36,0xa5,0x38,0xbf,0x40,0xa3,0x9e,0x81,0xf3,0xd7,0xfb, /*0*/
  27.     0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb, /*1*/
  28.     0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e, /*2*/
  29.     0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25, /*3*/
  30.     0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92, /*4*/
  31.     0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84, /*5*/
  32.     0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06, /*6*/
  33.     0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b, /*7*/
  34.     0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73, /*8*/
  35.     0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e, /*9*/
  36.     0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b, /*a*/
  37.     0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4, /*b*/
  38.     0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f, /*c*/
  39.     0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef, /*d*/
  40.     0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61, /*e*/
  41.     0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d /*f*/
  42.   };
  43.   memcpy(Sbox, sBox, 256);
  44.   memcpy(InvSbox, invsBox, 256);
  45.   KeyExpansion(key, w);
  46. }

  48. AES::~AES()
  49. {

  51. }

  53. void AES::Cipher(char *input, char *output)
  54. {
  55.   unsigned char uch_input
    版权声明：本文来源CSDN，感谢博主原创文章，遵循 CC 4.0 by-sa 版权协议，转载请附上原文出处链接和本声明。
    原文链接：https://blog.csdn.net/weixin_30359021/article/details/98285678
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    • 发表于 2021-12-11 18:01:07
    • 阅读 ( 1503 )
    • 分类：算法

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