111 lines
2.9 KiB
C++
Executable File
111 lines
2.9 KiB
C++
Executable File
/*
|
|
|
|
Copyright (c) 2003, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_HASHER_HPP_INCLUDED
|
|
#define TORRENT_HASHER_HPP_INCLUDED
|
|
|
|
#include <cassert>
|
|
#include <boost/cstdint.hpp>
|
|
|
|
#include "libtorrent/peer_id.hpp"
|
|
|
|
// from sha1.cpp
|
|
struct SHA1_CTX
|
|
{
|
|
boost::uint32_t state[5];
|
|
boost::uint32_t count[2];
|
|
boost::uint8_t buffer[64];
|
|
};
|
|
|
|
void SHA1Init(SHA1_CTX* context);
|
|
void SHA1Update(SHA1_CTX* context, boost::uint8_t const* data, boost::uint32_t len);
|
|
void SHA1Final(SHA1_CTX* context, boost::uint8_t* digest);
|
|
|
|
extern "C"
|
|
{
|
|
// from zlib/adler32.c
|
|
unsigned long adler32(unsigned long adler, const char* data, unsigned int len);
|
|
}
|
|
|
|
namespace libtorrent
|
|
{
|
|
|
|
class adler32_crc
|
|
{
|
|
public:
|
|
adler32_crc(): m_adler(adler32(0, 0, 0)) {}
|
|
|
|
void update(const char* data, int len)
|
|
{
|
|
assert(data != 0);
|
|
assert(len > 0);
|
|
m_adler = adler32(m_adler, data, len);
|
|
}
|
|
unsigned long final() const { return m_adler; }
|
|
void reset() { m_adler = adler32(0, 0, 0); }
|
|
|
|
private:
|
|
|
|
unsigned long m_adler;
|
|
|
|
};
|
|
|
|
class hasher
|
|
{
|
|
public:
|
|
|
|
hasher() { SHA1Init(&m_context); }
|
|
void update(const char* data, int len)
|
|
{
|
|
assert(data != 0);
|
|
assert(len > 0);
|
|
SHA1Update(&m_context, reinterpret_cast<unsigned char*>(const_cast<char*>(data)), len);
|
|
}
|
|
|
|
sha1_hash final()
|
|
{
|
|
sha1_hash digest;
|
|
SHA1Final(&m_context, digest.begin());
|
|
return digest;
|
|
}
|
|
|
|
void reset() { SHA1Init(&m_context); }
|
|
|
|
private:
|
|
|
|
SHA1_CTX m_context;
|
|
|
|
};
|
|
}
|
|
|
|
#endif // TORRENT_HASHER_HPP_INCLUDED
|