49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
|
// Crypto/Rar20Crypto.h
|
||
|
|
|
||
|
|
#ifndef __CRYPTO_RAR20_CRYPTO_H
|
||
|
|
#define __CRYPTO_RAR20_CRYPTO_H
|
||
|
|
|
||
|
|
#include "../../Common/MyCom.h"
|
||
|
|
|
||
|
|
#include "../ICoder.h"
|
||
|
|
|
||
|
|
namespace NCrypto {
|
||
|
|
namespace NRar2 {
|
||
|
|
|
||
|
|
/* ICompressFilter::Init() does nothing for this filter.
|
||
|
|
Call SetPassword() to initialize filter. */
|
||
|
|
|
||
|
|
class CData
|
||
|
|
{
|
||
|
|
Byte SubstTable[256];
|
||
|
|
UInt32 Keys[4];
|
||
|
|
|
||
|
|
UInt32 SubstLong(UInt32 t) const
|
||
|
|
{
|
||
|
|
return (UInt32)SubstTable[(unsigned)t & 255]
|
||
|
|
| ((UInt32)SubstTable[(unsigned)(t >> 8) & 255] << 8)
|
||
|
|
| ((UInt32)SubstTable[(unsigned)(t >> 16) & 255] << 16)
|
||
|
|
| ((UInt32)SubstTable[(unsigned)(t >> 24) & 255] << 24);
|
||
|
|
}
|
||
|
|
void UpdateKeys(const Byte *data);
|
||
|
|
void CryptBlock(Byte *buf, bool encrypt);
|
||
|
|
public:
|
||
|
|
void EncryptBlock(Byte *buf) { CryptBlock(buf, true); }
|
||
|
|
void DecryptBlock(Byte *buf) { CryptBlock(buf, false); }
|
||
|
|
void SetPassword(const Byte *password, unsigned passwordLen);
|
||
|
|
};
|
||
|
|
|
||
|
|
class CDecoder:
|
||
|
|
public ICompressFilter,
|
||
|
|
public CMyUnknownImp,
|
||
|
|
public CData
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
MY_UNKNOWN_IMP
|
||
|
|
INTERFACE_ICompressFilter(;)
|
||
|
|
};
|
||
|
|
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif
|