llxorcipher.h
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- /**
- * @file llxorcipher.h
- *
- * $LicenseInfo:firstyear=2003&license=viewergpl$
- *
- * Copyright (c) 2003-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LLXORCIPHER_H
- #define LLXORCIPHER_H
- #include "llcipher.h"
- //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- // Class LLXORCipher
- //
- // Implementation of LLCipher which encrypts using a XOR pad.
- //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- class LLXORCipher : public LLCipher
- {
- public:
- LLXORCipher(const U8* pad, U32 pad_len);
- LLXORCipher(const LLXORCipher& cipher);
- virtual ~LLXORCipher();
- LLXORCipher& operator=(const LLXORCipher& cipher);
- // Cipher functions
- /*virtual*/ U32 encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len);
- /*virtual*/ U32 decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len);
- /*virtual*/ U32 requiredEncryptionSpace(U32 src_len) const;
- // special syntactic-sugar since xor can be performed in place.
- BOOL encrypt(U8* buf, U32 len) { return encrypt((const U8*)buf, len, buf, len); }
- BOOL decrypt(U8* buf, U32 len) { return decrypt((const U8*)buf, len, buf, len); }
- #ifdef _DEBUG
- // This function runs tests to make sure the crc is
- // working. Returns TRUE if it is.
- static BOOL testHarness();
- #endif
- protected:
- void init(const U8* pad, U32 pad_len);
- U8* mPad;
- U8* mHead;
- U32 mPadLen;
- };
- #endif