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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* 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
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "LibgcryptMessageDigestImpl.h"
#include <algorithm>
#include "array_fun.h"
#include "HashFuncEntry.h"
#include "a2functional.h"
namespace aria2 {
MessageDigestImpl::MessageDigestImpl(int hashFunc) : hashFunc_{hashFunc}
{
gcry_md_open(&ctx_, hashFunc_, 0);
}
MessageDigestImpl::~MessageDigestImpl()
{
gcry_md_close(ctx_);
}
std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
{
return make_unique<MessageDigestImpl>(GCRY_MD_SHA1);
}
typedef HashFuncEntry<int> CHashFuncEntry;
typedef FindHashFunc<int> CFindHashFunc;
namespace {
CHashFuncEntry hashFuncs[] = {
CHashFuncEntry("sha-1", GCRY_MD_SHA1),
CHashFuncEntry("sha-224", GCRY_MD_SHA224),
CHashFuncEntry("sha-256", GCRY_MD_SHA256),
CHashFuncEntry("sha-384", GCRY_MD_SHA384),
CHashFuncEntry("sha-512", GCRY_MD_SHA512),
CHashFuncEntry("md5", GCRY_MD_MD5)
};
} // namespace
std::unique_ptr<MessageDigestImpl> MessageDigestImpl::create
(const std::string& hashType)
{
int hashFunc = getHashFunc(std::begin(hashFuncs), std::end(hashFuncs),
hashType);
return make_unique<MessageDigestImpl>(hashFunc);
}
bool MessageDigestImpl::supports(const std::string& hashType)
{
return std::end(hashFuncs) != std::find_if(std::begin(hashFuncs),
std::end(hashFuncs),
CFindHashFunc(hashType));
}
size_t MessageDigestImpl::getDigestLength(const std::string& hashType)
{
int hashFunc = getHashFunc(std::begin(hashFuncs), std::end(hashFuncs),
hashType);
return gcry_md_get_algo_dlen(hashFunc);
}
size_t MessageDigestImpl::getDigestLength() const
{
return gcry_md_get_algo_dlen(hashFunc_);
}
void MessageDigestImpl::reset()
{
gcry_md_reset(ctx_);
}
void MessageDigestImpl::update(const void* data, size_t length)
{
gcry_md_write(ctx_, data, length);
}
void MessageDigestImpl::digest(unsigned char* md)
{
memcpy(md, gcry_md_read(ctx_, 0), gcry_md_get_algo_dlen(hashFunc_));
}
} // namespace aria2
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