74 lines
1.3 KiB
C
74 lines
1.3 KiB
C
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// Crypto/ZipCrypto.h
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#ifndef __CRYPTO_ZIP_CRYPTO_H
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#define __CRYPTO_ZIP_CRYPTO_H
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#include "../../Common/MyCom.h"
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#include "../ICoder.h"
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#include "../IPassword.h"
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namespace NCrypto {
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namespace NZip {
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const unsigned kHeaderSize = 12;
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/* ICompressFilter::Init() does nothing for this filter.
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Call to init:
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Encoder:
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CryptoSetPassword();
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WriteHeader();
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Decoder:
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[CryptoSetPassword();]
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ReadHeader();
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[CryptoSetPassword();] Init_and_GetCrcByte();
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[CryptoSetPassword();] Init_and_GetCrcByte();
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*/
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class CCipher:
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public ICompressFilter,
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public ICryptoSetPassword,
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public CMyUnknownImp
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{
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protected:
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UInt32 Key0;
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UInt32 Key1;
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UInt32 Key2;
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UInt32 KeyMem0;
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UInt32 KeyMem1;
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UInt32 KeyMem2;
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void RestoreKeys()
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{
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Key0 = KeyMem0;
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Key1 = KeyMem1;
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Key2 = KeyMem2;
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}
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public:
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MY_UNKNOWN_IMP1(ICryptoSetPassword)
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STDMETHOD(Init)();
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STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
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};
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class CEncoder: public CCipher
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{
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public:
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STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
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HRESULT WriteHeader_Check16(ISequentialOutStream *outStream, UInt16 crc);
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};
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class CDecoder: public CCipher
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{
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public:
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Byte _header[kHeaderSize];
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STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
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HRESULT ReadHeader(ISequentialInStream *inStream);
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void Init_BeforeDecode();
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};
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}}
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#endif
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