forked from premiere/premiere-libtorrent
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/*
|
|
|
|
Copyright (c) 2003-2014, 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 <boost/cstdint.hpp>
|
|
|
|
#include "libtorrent/peer_id.hpp"
|
|
#include "libtorrent/config.hpp"
|
|
#include "libtorrent/assert.hpp"
|
|
|
|
#ifdef TORRENT_USE_GCRYPT
|
|
#include <gcrypt.h>
|
|
|
|
#elif TORRENT_USE_COMMONCRYPTO
|
|
|
|
#include <CommonCrypto/CommonDigest.h>
|
|
|
|
#elif defined TORRENT_USE_OPENSSL
|
|
|
|
extern "C"
|
|
{
|
|
#include <openssl/sha.h>
|
|
}
|
|
|
|
#else
|
|
// from sha1.cpp
|
|
namespace libtorrent
|
|
{
|
|
|
|
struct TORRENT_EXTRA_EXPORT sha_ctx
|
|
{
|
|
boost::uint32_t state[5];
|
|
boost::uint32_t count[2];
|
|
boost::uint8_t buffer[64];
|
|
};
|
|
|
|
TORRENT_EXTRA_EXPORT void SHA1_init(sha_ctx* context);
|
|
TORRENT_EXTRA_EXPORT void SHA1_update(sha_ctx* context, boost::uint8_t const* data, boost::uint32_t len);
|
|
TORRENT_EXTRA_EXPORT void SHA1_final(boost::uint8_t* digest, sha_ctx* context);
|
|
} // namespace libtorrent
|
|
|
|
#endif
|
|
|
|
namespace libtorrent
|
|
{
|
|
// this is a SHA-1 hash class.
|
|
//
|
|
// You use it by first instantiating it, then call ``update()`` to feed it
|
|
// with data. i.e. you don't have to keep the entire buffer of which you want to
|
|
// create the hash in memory. You can feed the hasher parts of it at a time. When
|
|
// You have fed the hasher with all the data, you call ``final()`` and it
|
|
// will return the sha1-hash of the data.
|
|
//
|
|
// The constructor that takes a ``char const*`` and an integer will construct the
|
|
// sha1 context and feed it the data passed in.
|
|
//
|
|
// If you want to reuse the hasher object once you have created a hash, you have to
|
|
// call ``reset()`` to reinitialize it.
|
|
//
|
|
// The sha1-algorithm used was implemented by Steve Reid and released as public domain.
|
|
// For more info, see ``src/sha1.cpp``.
|
|
class TORRENT_EXPORT hasher
|
|
{
|
|
public:
|
|
|
|
hasher();
|
|
|
|
// this is the same as default constructing followed by a call to
|
|
// ``update(data, len)``.
|
|
hasher(const char* data, int len);
|
|
|
|
#ifdef TORRENT_USE_GCRYPT
|
|
hasher(hasher const& h);
|
|
hasher& operator=(hasher const& h);
|
|
#endif
|
|
|
|
// append the following bytes to what is being hashed
|
|
hasher& update(std::string const& data) { update(data.c_str(), int(data.size())); return *this; }
|
|
hasher& update(const char* data, int len);
|
|
|
|
// returns the SHA-1 digest of the buffers previously passed to
|
|
// update() and the hasher constructor.
|
|
sha1_hash final();
|
|
// restore the hasher state to be as if the hasher has just been
|
|
// default constructed.
|
|
void reset();
|
|
|
|
~hasher();
|
|
|
|
private:
|
|
|
|
#ifdef TORRENT_USE_GCRYPT
|
|
gcry_md_hd_t m_context;
|
|
#elif TORRENT_USE_COMMONCRYPTO
|
|
CC_SHA1_CTX m_context;
|
|
#elif defined TORRENT_USE_OPENSSL
|
|
SHA_CTX m_context;
|
|
#else
|
|
sha_ctx m_context;
|
|
#endif
|
|
};
|
|
|
|
}
|
|
|
|
#endif // TORRENT_HASHER_HPP_INCLUDED
|
|
|