63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
/**
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* @file llcipher.h
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* @brief Abstract base class for encryption ciphers.
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*
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* $LicenseInfo:firstyear=2003&license=viewergpl$
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*
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* Copyright (c) 2003-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LLCIPHER_H
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#define LLCIPHER_H
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Class LLCipher
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//
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// Abstract base class for a cipher object.
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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class LLCipher
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{
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public:
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virtual ~LLCipher() {}
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// encrypt src and place result into dst. returns TRUE if
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// Returns number of bytes written into dst, or 0 on error.
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virtual U32 encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0;
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// decrypt src and place result into dst.
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// Returns number of bytes written into dst, or 0 on error.
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virtual U32 decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0;
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// returns the minimum amount of space required to encrypt for a
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// unencrypted source buffer of length len.
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// *NOTE: This is estimated space and you should check the return value
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// of the encrypt function.
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virtual U32 requiredEncryptionSpace(U32 src_len) const = 0 ;
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};
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#endif
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