/indra/llmessage/llxorcipher.h
C++ Header | 67 lines | 25 code | 9 blank | 33 comment | 0 complexity | b65907c7574cb8a32a7695b172f9998b MD5 | raw file
Possible License(s): LGPL-2.1
- /**
- * @file llxorcipher.h
- *
- * $LicenseInfo:firstyear=2003&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
- #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