mirror of https://github.com/aria2/aria2
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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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 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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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_MESSAGE_DIGEST_HELPER_H_
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#define _D_MESSAGE_DIGEST_HELPER_H_
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#include "common.h"
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#include "SharedHandle.h"
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#include "messageDigest.h"
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#include <string>
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namespace aria2 {
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class BinaryStream;
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class MessageDigestHelper {
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private:
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static MessageDigestContext* _sha1Ctx;
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public:
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/**
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* Returns message digest in hexadecimal representation.
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* Digest algorithm is specified by algo.
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*/
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static std::string digest(const std::string& algo, const SharedHandle<BinaryStream>& bs, off_t offset, uint64_t length);
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static std::string digest(const std::string& algo, const void* data, size_t length);
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static std::string digestString(const std::string& algo, const std::string& data)
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{
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return digest(algo, data.c_str(), data.size());
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}
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/**
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* staticSHA1DigestInit(), staticSHA1DigestFree(), staticSHA1Digest()
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* use statically declared MessageDigestContext _sha1Ctx.
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*/
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/**
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* Initializes _sha1Ctx
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*/
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static void staticSHA1DigestInit();
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/**
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* Frees allocated resources for _sha1Ctx
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*/
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static void staticSHA1DigestFree();
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static std::string staticSHA1Digest(const SharedHandle<BinaryStream>& bs,
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off_t offset, uint64_t length);
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/**
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* ctx must be initialized or reseted before calling this function.
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*/
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static std::string digest(MessageDigestContext* ctx,
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const SharedHandle<BinaryStream>& bs,
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off_t offset, uint64_t length);
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/**
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* Calculates message digest of file denoted by filename.
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* Returns message digest in hexadecimal representation.
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* Digest algorithm is specified by algo.
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*/
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static std::string digest(const std::string& algo, const std::string& filename);
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/**
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* Stores *raw* message digest into md.
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* Throws exception when mdLength is less than the size of message digest.
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*/
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static void digest(unsigned char* md, size_t mdLength,
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const std::string& algo, const void* data, size_t length);
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};
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} // namespace aria2
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#endif // _D_MESSAGE_DIGEST_HELPER_H_
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