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/***************************************************************************
Copyright (C) 2007-2009 Robby Stephenson <robby@periapsis.org>
***************************************************************************/
/***************************************************************************
* *
* 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) version 3 or any later version *
* accepted by the membership of KDE e.V. (or its successor approved *
* by the membership of KDE e.V.), which shall act as a proxy *
* defined in Section 14 of 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 "amazonrequest.h"
#include "hmac_sha2.h"
#include "../tellico_debug.h"
#include <kmdcodec.h>
#include <tqdatetime.h>
using Tellico::Fetch::AmazonRequest;
AmazonRequest::AmazonRequest(const KURL& site_, const TQString& key_) : m_siteUrl(site_), m_key(key_) {
}
KURL AmazonRequest::signedRequest(const TQMap<TQString, TQString>& params_) const {
TQMap<TQString, TQString> allParams = params_;
allParams.insert(TQString::fromLatin1("Timestamp"),
TQDateTime::currentDateTime(TQt::UTC).toString(TQt::ISODate));
TQString query;
// has to be a map so that the query elements are sorted
TQMap<TQString, TQString>::Iterator it;
for ( it = allParams.begin(); it != allParams.end(); ++it ) {
query += KURL::encode_string(it.key());
query += '=';
query += KURL::encode_string(it.data());
query += '&';
}
// remove last '&'
query.truncate(query.length()-1);
const TQCString toSign = "GET\n"
+ m_siteUrl.host().utf8() + '\n'
+ m_siteUrl.path().utf8() + '\n'
+ query.latin1();
TQByteArray hmac_buffer;
hmac_buffer.fill('\0', SHA256_DIGEST_SIZE);
// subtract one from string size for toSign, not exactly sure why
hmac_sha256(reinterpret_cast<unsigned char*>(const_cast<char*>(m_key.latin1())), m_key.length(),
reinterpret_cast<unsigned char*>(toSign.data()), toSign.size()-1,
reinterpret_cast<unsigned char*>(hmac_buffer.data()), hmac_buffer.size());
const TQString sig = KURL::encode_string(KCodecs::base64Encode(hmac_buffer));
// myDebug() << sig << endl;
KURL url = m_siteUrl;
url.setQuery(query + "&Signature=" + sig);
return url;
}
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