57 lines
2.0 KiB
C++
57 lines
2.0 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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* $LicenseInfo:firstyear=2003&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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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