Mercurial > vba-linux

     1 // Crypto/Rar20Crypto.h

     2 

     3 #ifndef __CRYPTO_RAR20_CRYPTO_H

     4 #define __CRYPTO_RAR20_CRYPTO_H

     5 

     6 #include "Common/MyCom.h"

     7 

     8 #include "../ICoder.h"

     9 #include "../IPassword.h"

    10 

    11 namespace NCrypto {

    12 namespace NRar20 {

    13 

    14 class CData

    15 {

    16   Byte SubstTable[256];

    17   UInt32 Keys[4];

    18   

    19   UInt32 SubstLong(UInt32 t)

    20   {

    21     return (UInt32)SubstTable[(int)t & 255] |

    22            ((UInt32)SubstTable[(int)(t >> 8) & 255] << 8) |

    23            ((UInt32)SubstTable[(int)(t >> 16) & 255] << 16) |

    24            ((UInt32)SubstTable[(int)(t >> 24) & 255] << 24);

    25   }

    26   void UpdateKeys(const Byte *data);

    27   void CryptBlock(Byte *buf, bool encrypt);

    28 public:

    29   void EncryptBlock(Byte *buf) { CryptBlock(buf, true); }

    30   void DecryptBlock(Byte *buf) { CryptBlock(buf, false); }

    31   void SetPassword(const Byte *password, UInt32 passwordLen);

    32 };

    33 

    34 class CDecoder:

    35   public ICompressFilter,

    36   public ICryptoSetPassword,

    37   public CMyUnknownImp

    38 {

    39   CData _cipher;

    40 public:

    41   MY_UNKNOWN_IMP1(ICryptoSetPassword)

    42 

    43   STDMETHOD(Init)();

    44   STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);

    45   STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);

    46 };

    47 

    48 }}

    49 

    50 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
parents
children