mirror of https://github.com/aria2/aria2
122 lines
3.7 KiB
C++
122 lines
3.7 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) 2013 Nils Maier
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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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#include "MessageDigestImpl.h"
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#include <gcrypt.h>
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namespace aria2 {
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namespace {
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template<int hash>
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class MessageDigestBase : public MessageDigestImpl {
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private:
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struct Deleter {
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void operator()(gcry_md_hd_t ctx) {
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if (ctx) {
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gcry_md_close(ctx);
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}
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}
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};
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public:
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MessageDigestBase()
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{
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gcry_md_hd_t ctx = nullptr;
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gcry_md_open(&ctx, hash, 0);
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ctx_.reset(ctx);
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reset();
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}
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virtual ~MessageDigestBase() {}
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static size_t length()
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{
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return ::gcry_md_get_algo_dlen(hash);
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}
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virtual size_t getDigestLength() const CXX11_OVERRIDE
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{
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return ::gcry_md_get_algo_dlen(hash);
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}
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virtual void reset() CXX11_OVERRIDE {
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::gcry_md_reset(ctx_.get());
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}
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virtual void update(const void* data, size_t length) CXX11_OVERRIDE
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{
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auto bytes = reinterpret_cast<const uint8_t*>(data);
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while (length) {
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size_t l = std::min(length, (size_t)std::numeric_limits<uint32_t>::max());
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gcry_md_write(ctx_.get(), bytes, length);
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length -= l;
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bytes += l;
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}
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}
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virtual void digest(unsigned char* md) CXX11_OVERRIDE
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{
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::memcpy(md, gcry_md_read(ctx_.get(), 0), getDigestLength());
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}
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private:
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std::unique_ptr<std::remove_pointer<gcry_md_hd_t>::type, Deleter> ctx_;
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};
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typedef MessageDigestBase<GCRY_MD_MD5> MessageDigestMD5;
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typedef MessageDigestBase<GCRY_MD_SHA1> MessageDigestSHA1;
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typedef MessageDigestBase<GCRY_MD_SHA224> MessageDigestSHA224;
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typedef MessageDigestBase<GCRY_MD_SHA256> MessageDigestSHA256;
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typedef MessageDigestBase<GCRY_MD_SHA384> MessageDigestSHA384;
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typedef MessageDigestBase<GCRY_MD_SHA512> MessageDigestSHA512;
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} // namespace
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std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
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{
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return std::unique_ptr<MessageDigestImpl>(new MessageDigestSHA1());
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}
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MessageDigestImpl::hashes_t MessageDigestImpl::hashes = {
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{ "sha-1", make_hi<MessageDigestSHA1>() },
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{ "sha-224", make_hi<MessageDigestSHA224>() },
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{ "sha-256", make_hi<MessageDigestSHA256>() },
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{ "sha-384", make_hi<MessageDigestSHA384>() },
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{ "sha-512", make_hi<MessageDigestSHA512>() },
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{ "md5", make_hi<MessageDigestMD5>() },
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};
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} // namespace aria2
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