4.44 beta

CPP/7zip/Crypto/Rar20/Rar20Crypto.h

@@ -0,0 +1,33 @@
+// Crypto/Rar20/Crypto.h
+
+#ifndef __CRYPTO_RAR20_CRYPTO_H
+#define __CRYPTO_RAR20_CRYPTO_H
+
+#include "../../../Common/Types.h"
+
+namespace NCrypto {
+namespace NRar20 {
+
+class CData
+{
+  Byte SubstTable[256];
+  UInt32 Keys[4];
+  UInt32 SubstLong(UInt32 t)
+  {
+    return (UInt32)SubstTable[(int)t & 255] | 
+           ((UInt32)SubstTable[(int)(t >> 8) & 255] << 8) |
+           ((UInt32)SubstTable[(int)(t >> 16) & 255] << 16) | 
+           ((UInt32)SubstTable[(int)(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, UInt32 passwordLength);
+};
+
+}}
+
+#endif