Simone
d074cc7c07
Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
// Crypto/Rar20Crypto.h
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#ifndef ZIP7_INC_CRYPTO_RAR20_CRYPTO_H
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#define ZIP7_INC_CRYPTO_RAR20_CRYPTO_H
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#include "../../Common/MyCom.h"
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#include "../ICoder.h"
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namespace NCrypto {
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namespace NRar2 {
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/* ICompressFilter::Init() does nothing for this filter.
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Call SetPassword() to initialize filter. */
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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) const
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{
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return (UInt32)SubstTable[(unsigned)t & 255]
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| ((UInt32)SubstTable[(unsigned)(t >> 8) & 255] << 8)
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| ((UInt32)SubstTable[(unsigned)(t >> 16) & 255] << 16)
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| ((UInt32)SubstTable[(unsigned)(t >> 24) ] << 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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~CData() { Wipe(); }
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void Wipe()
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{
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Z7_memset_0_ARRAY(SubstTable);
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Z7_memset_0_ARRAY(Keys);
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}
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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, unsigned passwordLen);
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};
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class CDecoder Z7_final:
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public ICompressFilter,
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public CMyUnknownImp,
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public CData
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{
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Z7_COM_UNKNOWN_IMP_0
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Z7_IFACE_COM7_IMP(ICompressFilter)
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};
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}}
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#endif
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