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/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
*
* 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 or (at your option)
* version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "CryptoHash.h"
#include <gcrypt.h>
class CryptoHashPrivate
{
public:
gcry_md_hd_t ctx;
int hashLen;
};
CryptoHash::CryptoHash(CryptoHash::Algorithm algo)
: d_ptr(new CryptoHashPrivate())
{
Q_D(CryptoHash);
int algoGcrypt;
switch (algo) {
case CryptoHash::Sha256:
algoGcrypt = GCRY_MD_SHA256;
break;
default:
Q_ASSERT(false);
break;
}
gcry_error_t error = gcry_md_open(&d->ctx, algoGcrypt, 0);
Q_ASSERT(error == 0); // TODO error handling
d->hashLen = gcry_md_get_algo_dlen(algoGcrypt);
}
CryptoHash::~CryptoHash()
{
Q_D(CryptoHash);
gcry_md_close(d->ctx);
delete d_ptr;
}
void CryptoHash::addData(const QByteArray& data)
{
Q_D(CryptoHash);
gcry_md_write(d->ctx, data.constData(), data.size());
}
void CryptoHash::reset()
{
Q_D(CryptoHash);
gcry_md_reset(d->ctx);
}
QByteArray CryptoHash::result() const
{
Q_D(const CryptoHash);
const char* result = reinterpret_cast<const char*>(gcry_md_read(d->ctx, 0));
return QByteArray(result, d->hashLen);
}
QByteArray CryptoHash::hash(const QByteArray& data, CryptoHash::Algorithm algo)
{
// replace with gcry_md_hash_buffer()?
CryptoHash cryptoHash(algo);
cryptoHash.addData(data);
return cryptoHash.result();
}
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