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// Crypto/ZipCrypto.h
#ifndef __CRYPTO_ZIP_CRYPTO_H
#define __CRYPTO_ZIP_CRYPTO_H
#include "Common/MyCom.h"
#include "../ICoder.h"
#include "../IPassword.h"
namespace NCrypto {
namespace NZip {
const unsigned kHeaderSize = 12;
class CCipher:
public ICompressFilter,
public ICryptoSetPassword,
public CMyUnknownImp
{
UInt32 Keys[3];
UInt32 Keys2[3];
protected:
void UpdateKeys(Byte b);
Byte DecryptByteSpec();
void RestoreKeys()
{
for (int i = 0; i < 3; i++)
Keys[i] = Keys2[i];
}
public:
STDMETHOD(Init)();
STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
};
class CEncoder: public CCipher
{
public:
MY_UNKNOWN_IMP1(ICryptoSetPassword)
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
HRESULT WriteHeader(ISequentialOutStream *outStream, UInt32 crc);
};
class CDecoder: public CCipher
{
public:
MY_UNKNOWN_IMP1(ICryptoSetPassword)
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
HRESULT ReadHeader(ISequentialInStream *inStream);
};
}}
#endif
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