Mercurial > vba-linux

     1 // Crypto/ZipCrypto.h

     2 

     3 #ifndef __CRYPTO_ZIP_CRYPTO_H

     4 #define __CRYPTO_ZIP_CRYPTO_H

     5 

     6 #include "Common/MyCom.h"

     7 

     8 #include "../ICoder.h"

     9 #include "../IPassword.h"

    10 

    11 namespace NCrypto {

    12 namespace NZip {

    13 

    14 const unsigned kHeaderSize = 12;

    15 

    16 class CCipher

    17 {

    18   UInt32 Keys[3];

    19 

    20   void UpdateKeys(Byte b);

    21   Byte DecryptByteSpec();

    22 public:

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

    24   Byte DecryptByte(Byte b);

    25   Byte EncryptByte(Byte b);

    26   void DecryptHeader(Byte *buf);

    27   void EncryptHeader(Byte *buf);

    28 };

    29 

    30 class CEncoder :

    31   public ICompressFilter,

    32   public ICryptoSetPassword,

    33   public ICryptoSetCRC,

    34   public CMyUnknownImp

    35 {

    36   CCipher _cipher;

    37   UInt32 _crc;

    38 public:

    39   MY_UNKNOWN_IMP2(

    40       ICryptoSetPassword,

    41       ICryptoSetCRC

    42   )

    43   STDMETHOD(Init)();

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

    45 

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

    47   STDMETHOD(CryptoSetCRC)(UInt32 crc);

    48   HRESULT WriteHeader(ISequentialOutStream *outStream);

    49 };

    50 

    51 

    52 class CDecoder:

    53   public ICompressFilter,

    54   public ICryptoSetPassword,

    55   public CMyUnknownImp

    56 {

    57   CCipher _cipher;

    58 public:

    59   MY_UNKNOWN_IMP1(ICryptoSetPassword)

    60 

    61   STDMETHOD(Init)();

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

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

    64 

    65   HRESULT ReadHeader(ISequentialInStream *inStream);

    66 };

    67 

    68 

    69 }}

    70 

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