64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/**
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* @file llblowfishcipher.h
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* @brief A symmetric block cipher, designed in 1993 by Bruce Schneier.
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* We use it because it has an 8 byte block size, allowing encryption of
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* two UUIDs and a timestamp (16x2 + 4 = 36 bytes) with only 40 bytes of
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* output. AES has a block size of 32 bytes, so this would require 64 bytes.
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*
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* $LicenseInfo:firstyear=2007&license=viewergpl$
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*
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* Copyright (c) 2007-2009, 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 LLBLOWFISHCIPHER_H
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#define LLBLOWFISHCIPHER_H
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#include "llcipher.h"
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class LLBlowfishCipher : public LLCipher
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{
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public:
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// Secret may be up to 56 bytes in length per Blowfish spec.
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LLBlowfishCipher(const U8* secret, size_t secret_size);
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virtual ~LLBlowfishCipher();
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// See llcipher.h for documentation.
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/*virtual*/ U32 encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len);
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/*virtual*/ U32 decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len);
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/*virtual*/ U32 requiredEncryptionSpace(U32 src_len) const;
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#ifdef _DEBUG
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static BOOL testHarness();
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#endif
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private:
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U8* mSecret;
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size_t mSecretSize;
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};
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#endif // LL_LLCRYPTO_H
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