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101 lines
3.3 KiB
101 lines
3.3 KiB
14 years ago
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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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#ifndef plEncryptedStream_h_inc
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#define plEncryptedStream_h_inc
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#include "hsStream.h"
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//
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// Encrypt a large file by running FileEncrypt on it. Small files can be done
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// in the usual way, but they will be in memory until Close is called. Files
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// will be decrypted on the fly during read.operations
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//
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class plEncryptedStream : public hsStream
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{
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protected:
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FILE* fRef;
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UInt32 fKey[4];
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UInt32 fActualFileSize;
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bool fBufferedStream;
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hsStream* fRAMStream;
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wchar* fWriteFileName;
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enum OpenMode { kOpenRead, kOpenWrite, kOpenFail };
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OpenMode fOpenMode;
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void IBufferFile();
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UInt32 IRead(UInt32 bytes, void* buffer);
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void IEncipher(UInt32* const v);
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void IDecipher(UInt32* const v);
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bool IWriteEncypted(hsStream* sourceStream, const wchar* outputFile);
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static bool ICheckMagicString(FILE* fp);
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public:
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// If you don't pass in a key (4 UInt32's), the default one will be used
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plEncryptedStream(UInt32* key=nil);
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~plEncryptedStream();
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virtual hsBool Open(const char* name, const char* mode = "rb");
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virtual hsBool Open(const wchar* name, const wchar* mode = L"rb");
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virtual hsBool Close();
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virtual UInt32 Read(UInt32 byteCount, void* buffer);
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virtual UInt32 Write(UInt32 byteCount, const void* buffer);
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virtual hsBool AtEnd();
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virtual void Skip(UInt32 deltaByteCount);
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virtual void Rewind();
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virtual void FastFwd();
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virtual UInt32 GetEOF();
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UInt32 GetActualFileSize() const { return fActualFileSize;}
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static bool FileEncrypt(const char* fileName);
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static bool FileEncrypt(const wchar* fileName);
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static bool FileDecrypt(const char* fileName);
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static bool FileDecrypt(const wchar* fileName);
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static bool IsEncryptedFile(const char* fileName);
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static bool IsEncryptedFile(const wchar* fileName);
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// Attempts to create a read-binary stream for the requested file. If it's
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// encrypted, you'll get a plEncryptedStream, otherwise just a standard
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// hsUNIXStream. Remember to delete the stream when you're done with it.
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static hsStream* OpenEncryptedFile(const char* fileName, bool requireEncrypted = true, UInt32* cryptKey = nil);
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static hsStream* OpenEncryptedFile(const wchar* fileName, bool requireEncrypted = true, UInt32* cryptKey = nil);
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static hsStream* OpenEncryptedFileWrite(const char* fileName, UInt32* cryptKey = nil);
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static hsStream* OpenEncryptedFileWrite(const wchar* fileName, UInt32* cryptKey = nil);
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};
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#endif // plEncryptedStream_h_inc
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