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#ifndef _RAR_CRYPT_
#define _RAR_CRYPT_
enum { OLD_DECODE=0,OLD_ENCODE=1,NEW_CRYPT=2 };
struct CryptKeyCacheItem
{
#ifndef _SFX_RTL_
CryptKeyCacheItem()
{
*Password=0;
}
~CryptKeyCacheItem()
{
memset(AESKey,0,sizeof(AESKey));
memset(AESInit,0,sizeof(AESInit));
memset(Password,0,sizeof(Password));
}
#endif
byte AESKey[16],AESInit[16];
char Password[MAXPASSWORD];
bool SaltPresent;
byte Salt[SALT_SIZE];
};
class CryptData
{
private:
void Encode13(byte *Data,uint Count);
void Decode13(byte *Data,uint Count);
void Crypt15(byte *Data,uint Count);
void UpdKeys(byte *Buf);
void Swap(byte *Ch1,byte *Ch2);
void SetOldKeys(char *Password);
Rijndael rin;
byte SubstTable[256];
uint Key[4];
ushort OldKey[4];
byte PN1,PN2,PN3;
byte AESKey[16],AESInit[16];
static CryptKeyCacheItem Cache[4];
static int CachePos;
public:
void SetCryptKeys(char *Password,byte *Salt,bool Encrypt,bool OldOnly=false);
void SetAV15Encryption();
void SetCmt13Encryption();
void EncryptBlock20(byte *Buf);
void DecryptBlock20(byte *Buf);
void EncryptBlock(byte *Buf,int Size);
void DecryptBlock(byte *Buf,int Size);
void Crypt(byte *Data,uint Count,int Method);
static void SetSalt(byte *Salt,int SaltSize);
};
#endif
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