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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kAccessControl
#include "mongo/platform/basic.h"
#include "mongo/db/auth/sasl_mechanism_registry.h"
#include "mongo/base/init.h"
#include "mongo/db/auth/sasl_options.h"
#include "mongo/db/auth/user.h"
#include "mongo/util/icu.h"
#include "mongo/util/log.h"
#include "mongo/util/net/socket_utils.h"
#include "mongo/util/scopeguard.h"
#include "mongo/util/sequence_util.h"
namespace mongo {
namespace {
const auto getSASLServerMechanismRegistry =
ServiceContext::declareDecoration<std::unique_ptr<SASLServerMechanismRegistry>>();
} // namespace
SASLServerMechanismRegistry& SASLServerMechanismRegistry::get(ServiceContext* serviceContext) {
auto& uptr = getSASLServerMechanismRegistry(serviceContext);
invariant(uptr);
return *uptr;
}
void SASLServerMechanismRegistry::set(ServiceContext* service,
std::unique_ptr<SASLServerMechanismRegistry> registry) {
getSASLServerMechanismRegistry(service) = std::move(registry);
}
SASLServerMechanismRegistry::SASLServerMechanismRegistry(std::vector<std::string> enabledMechanisms)
: _enabledMechanisms(std::move(enabledMechanisms)) {}
void SASLServerMechanismRegistry::setEnabledMechanisms(std::vector<std::string> enabledMechanisms) {
_enabledMechanisms = std::move(enabledMechanisms);
}
StatusWith<std::unique_ptr<ServerMechanismBase>> SASLServerMechanismRegistry::getServerMechanism(
StringData mechanismName, std::string authenticationDatabase) {
auto& mechList = _getMapRef(authenticationDatabase);
auto it = std::find_if(mechList.begin(), mechList.end(), [&](const auto& mech) {
return (mech->mechanismName() == mechanismName);
});
if (it != mechList.end()) {
return (*it)->create(std::move(authenticationDatabase));
}
return Status(ErrorCodes::BadValue,
str::stream() << "Unsupported mechanism '" << mechanismName
<< "' on authentication database '"
<< authenticationDatabase
<< "'");
}
void SASLServerMechanismRegistry::advertiseMechanismNamesForUser(OperationContext* opCtx,
const BSONObj& isMasterCmd,
BSONObjBuilder* builder) {
BSONElement saslSupportedMechs = isMasterCmd["saslSupportedMechs"];
if (saslSupportedMechs.type() == BSONType::String) {
const auto userName = uassertStatusOK(UserName::parse(saslSupportedMechs.String()));
AuthorizationManager* authManager = AuthorizationManager::get(opCtx->getServiceContext());
UserHandle user;
const auto swUser = authManager->acquireUser(opCtx, userName);
if (!swUser.isOK()) {
auto& status = swUser.getStatus();
if (status.code() == ErrorCodes::UserNotFound) {
log() << "Supported SASL mechanisms requested for unknown user '" << userName
<< "'";
return;
}
uassertStatusOK(status);
}
user = std::move(swUser.getValue());
BSONArrayBuilder mechanismsBuilder;
const auto& mechList = _getMapRef(userName.getDB());
for (const auto& factoryIt : mechList) {
SecurityPropertySet properties = factoryIt->properties();
if (!properties.hasAllProperties(SecurityPropertySet{SecurityProperty::kNoPlainText,
SecurityProperty::kMutualAuth}) &&
userName.getDB() != "$external") {
continue;
}
auto mechanismEnabled = _mechanismSupportedByConfig(factoryIt->mechanismName());
if (!mechanismEnabled && userName == internalSecurity.user->getName()) {
mechanismEnabled = factoryIt->isInternalAuthMech();
}
if (mechanismEnabled && factoryIt->canMakeMechanismForUser(user.get())) {
mechanismsBuilder << factoryIt->mechanismName();
}
}
builder->appendArray("saslSupportedMechs", mechanismsBuilder.arr());
}
}
bool SASLServerMechanismRegistry::_mechanismSupportedByConfig(StringData mechName) const {
return sequenceContains(_enabledMechanisms, mechName);
}
namespace {
ServiceContext::ConstructorActionRegisterer SASLServerMechanismRegistryInitializer{
"CreateSASLServerMechanismRegistry",
{"EndStartupOptionStorage"},
[](ServiceContext* service) {
SASLServerMechanismRegistry::set(service,
std::make_unique<SASLServerMechanismRegistry>(
saslGlobalParams.authenticationMechanisms));
}};
} // namespace
} // namespace mongo
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