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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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 "mongo/crypto/mechanism_scram.h"
#include "mongo/db/auth/sasl_mechanism_policies.h"
#include "mongo/db/auth/sasl_mechanism_registry.h"
#include "mongo/util/icu.h"
namespace mongo {
/**
* Server side authentication session for SASL SCRAM-SHA-1/256.
*/
template <typename Policy>
class SaslSCRAMServerMechanism final : public MakeServerMechanism<Policy> {
public:
using HashBlock = typename Policy::HashBlock;
explicit SaslSCRAMServerMechanism(std::string authenticationDatabase)
: MakeServerMechanism<Policy>(std::move(authenticationDatabase)) {}
/**
* Take one step in a SCRAM-SHA-1 conversation.
*
* @return !Status::OK() if auth failed. The boolean part indicates if the
* authentication conversation is finished or not.
*
**/
StatusWith<std::tuple<bool, std::string>> stepImpl(OperationContext* opCtx,
StringData inputData);
StatusWith<std::string> saslPrep(StringData str) const {
if (std::is_same<SHA1Block, HashBlock>::value) {
return str.toString();
} else {
return icuSaslPrep(str);
}
}
Status setOptions(BSONObj options) final;
private:
/**
* Parse client-first-message and generate server-first-message
**/
StatusWith<std::tuple<bool, std::string>> _firstStep(OperationContext* opCtx, StringData input);
/**
* Parse client-final-message and generate server-final-message
**/
StatusWith<std::tuple<bool, std::string>> _secondStep(OperationContext* opCtx,
StringData input);
int _step{0};
std::string _authMessage;
// The secrets to check the client proof against during the second step
// Usually only contains one element, except during key rollover.
std::vector<scram::Secrets<HashBlock, scram::UnlockedSecretsPolicy>> _secrets;
// client and server nonce concatenated
std::string _nonce;
// Do not send empty 3rd reply in scram conversation.
bool _skipEmptyExchange{false};
};
extern template class SaslSCRAMServerMechanism<SCRAMSHA1Policy>;
extern template class SaslSCRAMServerMechanism<SCRAMSHA256Policy>;
template <typename ScramMechanism>
class SCRAMServerFactory : public MakeServerFactory<ScramMechanism> {
public:
using MakeServerFactory<ScramMechanism>::MakeServerFactory;
static constexpr bool isInternal = true;
bool canMakeMechanismForUser(const User* user) const final {
auto credentials = user->getCredentials();
return credentials.scram<typename ScramMechanism::HashBlock>().isValid();
}
};
using SaslSCRAMSHA1ServerMechanism = SaslSCRAMServerMechanism<SCRAMSHA1Policy>;
using SCRAMSHA1ServerFactory = SCRAMServerFactory<SaslSCRAMSHA1ServerMechanism>;
using SaslSCRAMSHA256ServerMechanism = SaslSCRAMServerMechanism<SCRAMSHA256Policy>;
using SCRAMSHA256ServerFactory = SCRAMServerFactory<SaslSCRAMSHA256ServerMechanism>;
} // namespace mongo
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