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91 lines
2.6 KiB
91 lines
2.6 KiB
15 years ago
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/***************************************************************************
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* Copyright (C) 2005 by Joris Guisson *
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* joris.guisson@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef BTSHA1HASHGEN_H
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#define BTSHA1HASHGEN_H
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#include "constants.h"
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#include "sha1hash.h"
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namespace bt
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{
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/**
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* @author Joris Guisson
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*
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* Generates a SHA1 hash, code based on wikipedia's pseudocode
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* There are 2 ways to use this class :
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* - generate : all data is present from the start
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* - start, update and end : data can be delivered in chunks
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*
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* Mixing the 2, is not a good idea
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*/
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class SHA1HashGen
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{
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Uint32 h0;
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Uint32 h1;
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Uint32 h2;
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Uint32 h3;
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Uint32 h4;
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Uint8 tmp[64];
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Uint32 tmp_len;
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Uint32 total_len;
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public:
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SHA1HashGen();
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~SHA1HashGen();
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/**
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* Generate a hash from a bunch of data.
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* @param data The data
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* @param len The length
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* @return The SHA1 hash
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*/
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SHA1Hash generate(const Uint8* data,Uint32 len);
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/**
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* Start SHA1 hash generation in chunks.
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*/
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void start();
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/**
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* Update the hash.
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* @param data The data
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* @param len Length of the data
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*/
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void update(const Uint8* data,Uint32 len);
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/**
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* All data has been delivered, calculate the final hash.
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* @return
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*/
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void end();
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/**
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* Get the hash generated.
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*/
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SHA1Hash get() const;
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private:
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void processChunk(const Uint8* c);
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};
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}
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#endif
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