1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/win32/7zip/7z/CPP/7zip/Crypto/ZipCrypto.h	Sat Mar 03 10:31:27 2012 -0600
     1.3 @@ -0,0 +1,71 @@
     1.4 +// Crypto/ZipCrypto.h
     1.5 +
     1.6 +#ifndef __CRYPTO_ZIP_CRYPTO_H
     1.7 +#define __CRYPTO_ZIP_CRYPTO_H
     1.8 +
     1.9 +#include "Common/MyCom.h"
    1.10 +
    1.11 +#include "../ICoder.h"
    1.12 +#include "../IPassword.h"
    1.13 +
    1.14 +namespace NCrypto {
    1.15 +namespace NZip {
    1.16 +
    1.17 +const unsigned kHeaderSize = 12;
    1.18 +
    1.19 +class CCipher
    1.20 +{
    1.21 +  UInt32 Keys[3];
    1.22 +
    1.23 +  void UpdateKeys(Byte b);
    1.24 +  Byte DecryptByteSpec();
    1.25 +public:
    1.26 +  void SetPassword(const Byte *password, UInt32 passwordLen);
    1.27 +  Byte DecryptByte(Byte b);
    1.28 +  Byte EncryptByte(Byte b);
    1.29 +  void DecryptHeader(Byte *buf);
    1.30 +  void EncryptHeader(Byte *buf);
    1.31 +};
    1.32 +
    1.33 +class CEncoder :
    1.34 +  public ICompressFilter,
    1.35 +  public ICryptoSetPassword,
    1.36 +  public ICryptoSetCRC,
    1.37 +  public CMyUnknownImp
    1.38 +{
    1.39 +  CCipher _cipher;
    1.40 +  UInt32 _crc;
    1.41 +public:
    1.42 +  MY_UNKNOWN_IMP2(
    1.43 +      ICryptoSetPassword,
    1.44 +      ICryptoSetCRC
    1.45 +  )
    1.46 +  STDMETHOD(Init)();
    1.47 +  STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
    1.48 +
    1.49 +  STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
    1.50 +  STDMETHOD(CryptoSetCRC)(UInt32 crc);
    1.51 +  HRESULT WriteHeader(ISequentialOutStream *outStream);
    1.52 +};
    1.53 +
    1.54 +
    1.55 +class CDecoder:
    1.56 +  public ICompressFilter,
    1.57 +  public ICryptoSetPassword,
    1.58 +  public CMyUnknownImp
    1.59 +{
    1.60 +  CCipher _cipher;
    1.61 +public:
    1.62 +  MY_UNKNOWN_IMP1(ICryptoSetPassword)
    1.63 +
    1.64 +  STDMETHOD(Init)();
    1.65 +  STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
    1.66 +  STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
    1.67 +
    1.68 +  HRESULT ReadHeader(ISequentialInStream *inStream);
    1.69 +};
    1.70 +
    1.71 +
    1.72 +}}
    1.73 +
    1.74 +#endif