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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.
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* 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 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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