奶头挺立呻吟高潮av全片,成人试看120秒体验区,性欧美极品v,A片高潮抽搐揉捏奶头视频

C語言

C++中四種加密算法之DES源代碼

時間:2024-11-08 22:35:35 C語言 我要投稿
  • 相關推薦

C++中四種加密算法之DES源代碼

  DES算法是一種最通用的對稱密鑰算法,因為算法本身是公開的,所以其安全性在于密鑰的安全性;诿荑的算法通常有兩類:對稱算法和公開密鑰算法。對稱算法的對稱性體現在加密密鑰能夠從解密密鑰推算出來,反之亦然。下面梳理了C++中四種加密算法之DES源代碼,供大家參考借鑒。


  在大多數對稱算法中,加解密的密鑰是相同的,DES就是這樣。可見,對稱密鑰算法的加解密密鑰都是保密的。而公開密鑰算法的加密密鑰是公開的,解密密鑰是保密的。

  DES具體算法如下:

  //////////////////////////////////////////////////////////////////////////

  /*

  Provided by 朱孟斌, National University Of Technology

  Email: zmbtsubasa@gmailcom

  This product is free for use

  */

  //////////////////////////////////////////////////////////////////////////

  #ifndef Des_H

  #define Des_H

  //! enum bool{false,true};

  /*!

  if bool is not supported,use this or just replace with char and use 1 for true,0 for false;

  @see enum {ENCRYPT,DECRYPT};

  */

  enum {ENCRYPT,DECRYPT};

  /*@brief 16圈子密鑰*/

  static bool SubKey[2][16][48];// 16圈子密鑰

  /*@brief 3次DES標志*/

  static bool Is3DES;// 3次DES標志

  static char Tmp[256];

  static char deskey[16];

  typedef bool (*PSubKey)[16][48];

  class _declspec(dllexport) Des

  {

  public:

  Des();

  ~Des();

  //! Type—ENCRYPT:加密,DECRYPT:解密

  /*!

  輸出緩沖區(Out)的長度 >= ((datalen+7)/8)*8,即比datalen大的且是8的倍數的最小正整數

  In 可以= Out,此時加/解密后將覆蓋輸入緩沖區(In)的內容

  當keylen>8時系統自動使用3次DES加/解密,否則使用標準DES加/解密超過16字節后只取前16字節

  @see bool Des_Go(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type = ENCRYPT);

  */

  bool Des_Go(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type = ENCRYPT);

  private:

  /*! @brief 標準DES加/解密

  @see static void DES(char Out[8], char In[8], const PSubKey pSubKey, bool Type);

  */

  static void DES(char Out[8], char In[8], const PSubKey pSubKey, bool Type);//標準DES加/解密

  /*! @brief 設置密鑰

  @see static void SetKey(const char* Key, int len);

  */

  static void SetKey(const char* Key, int len);// 設置密鑰

  /*! @brief 設置子密鑰

  @see static void SetSubKey(PSubKey pSubKey, const char Key[8]);

  */

  static void SetSubKey(PSubKey pSubKey, const char Key[8]);// 設置子密鑰

  /*! @brief f 函數

  @see static void F_func(bool In[32], const bool Ki[48]);

  */

  static void F_func(bool In[32], const bool Ki[48]);// f 函數

  /*! @brief S 盒代替

  @see static void S_func(bool Out[32], const bool In[48]);

  */

  static void S_func(bool Out[32], const bool In[48]);// S 盒代替

  /*! @brief 變換

  @see static void Transform(bool *Out, bool *In, const char *Table, int len);

  */

  static void Transform(bool *Out, bool *In, const char *Table, int len);// 變換

  /*! @brief 異或

  @see static void Xor(bool *InA, const bool *InB, int len);

  */

  static void Xor(bool *InA, const bool *InB, int len);// 異或

  /*! @brief 循環左移

  @see static void RotateL(bool *In, int len, int loop);

  */

  static void RotateL(bool *In, int len, int loop);// 循環左移

  /*! @brief 字節組轉換成位組

  @see static void ByteToBit(bool *Out, const char *In, int bits);

  */

  static void ByteToBit(bool *Out, const char *In, int bits);// 字節組轉換成位組

  /*! @brief 位組轉換成字節組

  @see static void BitToByte(char *Out, const bool *In, int bits);

  */

  static void BitToByte(char *Out, const bool *In, int bits);// 位組轉換成字節組

  };

  //////////////////////////////////////////////////////////////////////////

  //////////////////////////////////////////////////////////////////////////

  #endif

  DES.cpp文件:

  //////////////////////////////////////////////////////////////////////////

  /*

  Provided by 朱孟斌, National University Of Technology

  Email: zmbtsubasa@gmailcom

  This product is free for use

  */

  //////////////////////////////////////////////////////////////////////////

  #include "memoryh"

  #include "Desh"

  //////////////////////////////////////////////////////////////////////////

  // initial permutation IP

  const static char IP_Table[64] = {

  58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,

  62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,

  57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,

  61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7

  };

  // final permutation IP^-1

  const static char IPR_Table[64] = {

  40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,

  38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,

  36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,

  34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25

  };

  // expansion operation matrix

  static const char E_Table[48] = {

  32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,

  8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,

  16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,

  24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1

  };

  // 32-bit permutation function P used on the output of the S-boxes

  const static char P_Table[32] = {

  16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,

  2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25

  };

  // permuted choice table (key)

  const static char PC1_Table[56] = {

  57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,

  10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,

  63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,

  14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4

  };

  // permuted choice key (table)

  const static char PC2_Table[48] = {

  14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,

  23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,

  41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,

  44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32

  };

  // number left rotations of pc1

  const static char LOOP_Table[16] = {

  1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1

  };

  // The (in)famous S-boxes

  const static char S_Box[8][4][16] = {

  // S1

  14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,

  0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,

  4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,

  15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,

  // S2

  15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,

  3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,

  0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,

  13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,

  // S3

  10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,

  13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,

  13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,

  1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,

  // S4

  7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,

  13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,

  10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,

  3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,

  // S5

  2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,

  14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,

  4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,

  11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3,

  // S6

  12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,

  10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,

  9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,

  4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13,

  // S7

  4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,

  13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,

  1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,

  6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12,

  // S8

  13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,

  1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,

  7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,

  2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11

  };

  //////////////////////////////////////////////////////////////////////////

  // Code starts:

  //////////////////////////////////////////////////////////////////////////

  Des::Des()

  {

  }

  Des::~Des()

  {

  }

  bool Des::Des_Go(char *Out, char *In, long datalen, const char *Key, int keylen, bool Type)

  {

  if( !( Out && In && Key && (datalen=(datalen+7)&0xfffffff8) ) )

  return false;

  SetKey(Key, keylen);

  if( !Is3DES ) { // 1次DES

  for(long i=0,j=datalen>>3; i<j; ++i,Out+=8,In+=8)

  DES(Out, In, &SubKey[0], Type);

  } else{ // 3次DES 加密:加(key0)-解(key1)-加(key0) 解密::解(key0)-加(key1)-解(key0)

  for(long i=0,j=datalen>>3; i<j; ++i,Out+=8,In+=8) {

  DES(Out, In, &SubKey[0], Type);

  DES(Out, Out, &SubKey[1], !Type);

  DES(Out, Out, &SubKey[0], Type);

  }

  }

  return true;

  }

  void Des::SetKey(const char* Key, int len)

  {

  memset(deskey, 0, 16);

  memcpy(deskey, Key, len>16?16:len);

  SetSubKey(&SubKey[0], &deskey[0]);

  Is3DES = len>8 ? (SetSubKey(&SubKey[1], &deskey[8]), true) : false;

  }

  void Des::DES(char Out[8], char In[8], const PSubKey pSubKey, bool Type)

  {

  static bool M[64], tmp[32], *Li=&M[0], *Ri=&M[32];

  ByteToBit(M, In, 64);

  Transform(M, M, IP_Table, 64);

  if( Type == ENCRYPT ){

  for(int i=0; i<16; ++i) {

  memcpy(tmp, Ri, 32);

  F_func(Ri, (*pSubKey)[i]);

  Xor(Ri, Li, 32);

  memcpy(Li, tmp, 32);

  }

  }else{

  for(int i=15; i>=0; --i) {

  memcpy(tmp, Li, 32);

  F_func(Li, (*pSubKey)[i]);

  Xor(Li, Ri, 32);

  memcpy(Ri, tmp, 32);

  }

  }

  Transform(M, M, IPR_Table, 64);

  BitToByte(Out, M, 64);

  }

  void Des::SetSubKey(PSubKey pSubKey, const char Key[8])

  {

  static bool K[64], *KL=&K[0], *KR=&K[28];

  ByteToBit(K, Key, 64);

  Transform(K, K, PC1_Table, 56);

  for(int i=0; i<16; ++i) {

  RotateL(KL, 28, LOOP_Table[i]);

  RotateL(KR, 28, LOOP_Table[i]);

  Transform((*pSubKey)[i], K, PC2_Table, 48);

  }

  }

  void Des::F_func(bool In[32], const bool Ki[48])

  {

  static bool MR[48];

  Transform(MR, In, E_Table, 48);

  Xor(MR, Ki, 48);

  S_func(In, MR);

  Transform(In, In, P_Table, 32);

  }

  void Des::S_func(bool Out[32], const bool In[48])

  {

  for(char i=0,j,k; i<8; ++i,In+=6,Out+=4) {

  j = (In[0]<<1) + In[5];

  k = (In[1]<<3) + (In[2]<<2) + (In[3]<<1) + In[4];

  ByteToBit(Out, &S_Box[i][j][k], 4);

  }

  }

  void Des::Transform(bool *Out, bool *In, const char *Table, int len)

  {

  for(int i=0; i<len; ++i)

  Tmp[i] = In[ Table[i]-1 ];

  memcpy(Out, Tmp, len);

  }

  void Des::Xor(bool *InA, const bool *InB, int len)

  {

  for(int i=0; i<len; ++i)

  InA[i] ^= InB[i];

  }

  void Des::RotateL(bool *In, int len, int loop)

  {

  memcpy(Tmp, In, loop);

  memcpy(In, In+loop, len-loop);

  memcpy(In+len-loop, Tmp, loop);

  }

  void Des::ByteToBit(bool *Out, const char *In, int bits)

  {

  for(int i=0; i<bits; ++i)

  Out[i] = (In[i>>3]>>(i&7)) & 1;

  }

  void Des::BitToByte(char *Out, const bool *In, int bits)

  {

  memset(Out, 0, bits>>3);

  for(int i=0; i<bits; ++i)

  Out[i>>3] |= In[i]<<(i&7);

  }

  //////////////////////////////////////////////////////////////////////////

  // Code ends

  //////////////////////////////////////////////////////////////////////////

【C++中四種加密算法之DES源代碼】相關文章:

C++中時間與時間戳的轉換11-01

java加密算法是什么09-14

PHP源代碼方式詳解08-08

c和c++中實現函數回調的方法08-30

register關鍵字在c語言和c++中的差異09-23

英語寫作中四種橫線具體的用法10-03

C++類的轉換10-17

PHP實現大文件上傳源代碼10-21

PHP中URL參數獲取方式的四種例子08-20

C++函數考點歸納09-30

主站蜘蛛池模板: 息烽县| 卓尼县| 海林市| 钟山县| 定日县| 鄂尔多斯市| 安图县| 丰顺县| 五常市| 洛宁县| 老河口市| 凉城县| 襄城县| 汝城县| 花莲县| 莱西市| 招远市| 东宁县| 平陆县| 临西县| 黄大仙区| 乌兰察布市| 辉南县| 佳木斯市| 东乡县| 集贤县| 诸城市| 富裕县| 华宁县| 宜宾市| 兴业县| 连州市| 项城市| 陈巴尔虎旗| 普兰店市| 南涧| 岑溪市| 博白县| 嵊泗县| 任丘市| 江津市|