58 lines
1.9 KiB
C++
58 lines
1.9 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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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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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 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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