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