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51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
// Crypto/Rar20Crypto.h
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#ifndef __CRYPTO_RAR20_CRYPTO_H
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#define __CRYPTO_RAR20_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 NRar20 {
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class CData
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{
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Byte SubstTable[256];
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UInt32 Keys[4];
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UInt32 SubstLong(UInt32 t)
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{
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return (UInt32)SubstTable[(int)t & 255] |
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((UInt32)SubstTable[(int)(t >> 8) & 255] << 8) |
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((UInt32)SubstTable[(int)(t >> 16) & 255] << 16) |
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((UInt32)SubstTable[(int)(t >> 24) & 255] << 24);
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}
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void UpdateKeys(const Byte *data);
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void CryptBlock(Byte *buf, bool encrypt);
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public:
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void EncryptBlock(Byte *buf) { CryptBlock(buf, true); }
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void DecryptBlock(Byte *buf) { CryptBlock(buf, false); }
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void SetPassword(const Byte *password, UInt32 passwordLen);
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};
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class CDecoder:
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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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CData _cipher;
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public:
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MY_UNKNOWN_IMP1(ICryptoSetPassword)
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STDMETHOD(Init)();
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STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
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STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
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};
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}}
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#endif
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