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/*
* Copyright (C) 2014 MongoDB 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.
*/
#pragma once
#include <string>
#include <vector>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/base/string_data.h"
#include "mongo/client/sasl_client_conversation.h"
#include "mongo/crypto/mechanism_scram.h"
namespace mongo {
class SCRAMSHA1ClientCache;
/**
* Client side authentication session for SASL PLAIN.
*/
class SaslSCRAMSHA1ClientConversation : public SaslClientConversation {
MONGO_DISALLOW_COPYING(SaslSCRAMSHA1ClientConversation);
public:
/**
* Implements the client side of a SASL PLAIN mechanism session.
**/
SaslSCRAMSHA1ClientConversation(SaslClientSession* saslClientSession,
SCRAMSHA1ClientCache* clientCache);
/**
* Takes one step in a SCRAM-SHA-1 conversation.
*
* @return !Status::OK() for failure. The boolean part indicates if the
* authentication conversation is finished or not.
*
**/
virtual StatusWith<bool> step(StringData inputData, std::string* outputData);
private:
/**
* Generates client-first-message.
**/
StatusWith<bool> _firstStep(std::string* outputData);
/**
* Parses server-first-message and generate client-final-message.
**/
StatusWith<bool> _secondStep(const std::vector<std::string>& input, std::string* outputData);
/**
* Generates client-first-message.
**/
StatusWith<bool> _thirdStep(const std::vector<std::string>& input, std::string* outputData);
int _step;
std::string _authMessage;
// Secrets and secrets cache
scram::SCRAMSecrets _credentials;
SCRAMSHA1ClientCache* const _clientCache;
// client and server nonce concatenated
std::string _clientNonce;
};
} // namespace mongo
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