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/*    Copyright 2012 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    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 program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. 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 in the license file.
 */

#include "mongo/client/sasl_client_session.h"

#include "mongo/base/init.h"
#include "mongo/util/allocator.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/signal_handlers_synchronous.h"

namespace mongo {
SaslClientSession::SaslClientSessionFactoryFn SaslClientSession::create;

SaslClientSession::SaslClientSession() {}

SaslClientSession::~SaslClientSession() {}

void SaslClientSession::setParameter(Parameter id, StringData value) {
    fassert(16807, id >= 0 && id < numParameters);
    fassert(28583, value.size() < std::numeric_limits<std::size_t>::max());

    DataBuffer& buffer = _parameters[id];
    buffer.size = value.size();
    buffer.data.reset(new char[buffer.size + 1]);

    // Note that we append a terminal NUL to buffer.data, so it may be treated as a C-style
    // string.  This is required for parameterServiceName, parameterServiceHostname,
    // parameterMechanism and parameterUser.
    value.copyTo(buffer.data.get(), true);
}

bool SaslClientSession::hasParameter(Parameter id) {
    if (id < 0 || id >= numParameters)
        return false;
    return static_cast<bool>(_parameters[id].data);
}

StringData SaslClientSession::getParameter(Parameter id) {
    if (!hasParameter(id))
        return StringData();

    DataBuffer& buffer = _parameters[id];
    return StringData(buffer.data.get(), buffer.size);
}

}  // namespace mongo