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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef BTSHA1HASH_H
#define BTSHA1HASH_H
#include <qcstring.h>
#include "constants.h"
class QString;
namespace bt
{
class Log;
/**
* @author Joris Guisson
* @brief Stores a SHA1 hash
*
* This class keeps track of a SHA1 hash. A SHA1 hash is a 20 byte
* array of bytes.
*/
class SHA1Hash
{
protected:
Uint8 hash[20];
public:
/**
* Constructor, sets every byte in the hash to 0.
*/
SHA1Hash();
/**
* Copy constructor.
* @param other Hash to copy
*/
SHA1Hash(const SHA1Hash & other);
/**
* Directly set the hash data.
* @param h The hash data must be 20 bytes large
*/
SHA1Hash(const Uint8* h);
/**
* Destructor.
*/
virtual ~SHA1Hash();
/// Get the idx'th byte of the hash.
Uint8 operator [] (const Uint32 idx) const {return idx < 20 ? hash[idx] : 0;}
/**
* Assignment operator.
* @param other Hash to copy
*/
SHA1Hash & operator = (const SHA1Hash & other);
/**
* Test wether another hash is equal to this one.
* @param other The other hash
* @return true if equal, false otherwise
*/
bool operator == (const SHA1Hash & other) const;
/**
* Test wether another hash is not equal to this one.
* @param other The other hash
* @return true if not equal, false otherwise
*/
bool operator != (const SHA1Hash & other) const {return !operator ==(other);}
/**
* Generate an SHA1 hash from a bunch of data.
* @param data The data
* @param len Size in bytes of data
* @return The generated SHA1 hash
*/
static SHA1Hash generate(const Uint8* data,Uint32 len);
/**
* Convert the hash to a printable string.
* @return The string
*/
QString toString() const;
/**
* Convert the hash to a string, usable in http get requests.
* @return The string
*/
QString toURLString() const;
/**
* Directly get pointer to the data.
* @return The data
*/
const Uint8* getData() const {return hash;}
/**
* Function to print a SHA1Hash to the Log.
* @param out The Log
* @param h The hash
* @return out
*/
friend Log & operator << (Log & out,const SHA1Hash & h);
/**
* XOR two SHA1Hashes
* @param a The first hash
* @param b The second
* @return a xor b
*/
friend SHA1Hash operator ^ (const SHA1Hash & a,const SHA1Hash & b);
/**
* Function to compare 2 hashes
* @param a The first hash
* @param h The second hash
* @return wether a is smaller then b
*/
friend bool operator < (const SHA1Hash & a,const SHA1Hash & b);
/**
* Convert the hash to a byte array.
*/
QByteArray toByteArray() const;
};
}
#endif
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