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/**
* Copyright (C) 2022-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.
*/
#include "mongo/db/auth/validated_tenancy_scope.h"
#include "mongo/base/init.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/security_token_gen.h"
#include "mongo/db/multitenancy.h"
#include "mongo/db/multitenancy_gen.h"
#include "mongo/db/server_feature_flags_gen.h"
#include "mongo/logv2/log.h"
#include "mongo/logv2/log_detail.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kAccessControl
namespace mongo::auth {
namespace {
const auto validatedTenancyScopeDecoration =
OperationContext::declareDecoration<boost::optional<ValidatedTenancyScope>>();
MONGO_INITIALIZER(SecurityTokenOptionValidate)(InitializerContext*) {
if (gMultitenancySupport) {
logv2::detail::setGetTenantIDCallback([]() -> std::string {
auto* client = Client::getCurrent();
if (!client) {
return std::string();
}
if (auto* opCtx = client->getOperationContext()) {
if (auto token = ValidatedTenancyScope::get(opCtx)) {
return token->tenantId().toString();
}
}
return std::string();
});
}
if (gFeatureFlagSecurityToken.isEnabledAndIgnoreFCVUnsafeAtStartup()) {
LOGV2_WARNING(
7539600,
"featureFlagSecurityToken is enabled. This flag MUST NOT be enabled in production");
}
}
} // namespace
ValidatedTenancyScope::ValidatedTenancyScope(BSONObj obj, InitTag tag) : _originalToken(obj) {
const bool enabled = gMultitenancySupport &&
gFeatureFlagSecurityToken.isEnabled(serverGlobalParams.featureCompatibility);
uassert(ErrorCodes::InvalidOptions,
"Multitenancy not enabled, refusing to accept securityToken",
enabled || (tag == InitTag::kInitForShell));
auto token = SecurityToken::parse(IDLParserContext{"Security Token"}, obj);
auto authenticatedUser = token.getAuthenticatedUser();
uassert(ErrorCodes::BadValue,
"Security token authenticated user requires a valid Tenant ID",
authenticatedUser.getTenant());
// Use actual authenticatedUser object as passed to preserve hash input.
auto authUserObj = obj[SecurityToken::kAuthenticatedUserFieldName].Obj();
ConstDataRange authUserCDR(authUserObj.objdata(), authUserObj.objsize());
// Placeholder algorithm.
auto computed = SHA256Block::computeHash({authUserCDR});
uassert(ErrorCodes::Unauthorized, "Token signature invalid", computed == token.getSig());
_tenantOrUser = std::move(authenticatedUser);
}
ValidatedTenancyScope::ValidatedTenancyScope(Client* client, TenantId tenant)
: _tenantOrUser(std::move(tenant)) {
uassert(ErrorCodes::InvalidOptions,
"Multitenancy not enabled, refusing to accept $tenant parameter",
gMultitenancySupport);
uassert(ErrorCodes::Unauthorized,
"'$tenant' may only be specified with the useTenant action type",
client &&
AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forClusterResource(), ActionType::useTenant));
}
boost::optional<ValidatedTenancyScope> ValidatedTenancyScope::create(Client* client,
BSONObj body,
BSONObj securityToken) {
if (!gMultitenancySupport) {
return boost::none;
}
auto dollarTenantElem = body["$tenant"_sd];
const bool hasToken = securityToken.nFields() > 0;
uassert(6545800,
"Cannot pass $tenant id if also passing securityToken",
dollarTenantElem.eoo() || !hasToken);
uassert(ErrorCodes::OperationFailed,
"Cannot process $tenant id when no client is available",
dollarTenantElem.eoo() || client);
// TODO SERVER-66822: Re-enable this uassert.
// uassert(ErrorCodes::Unauthorized,
// "Multitenancy is enabled, $tenant id or securityToken is required.",
// dollarTenantElem || opMsg.securityToken.nFields() > 0);
if (dollarTenantElem) {
return ValidatedTenancyScope(client, TenantId::parseFromBSON(dollarTenantElem));
} else if (hasToken) {
return ValidatedTenancyScope(securityToken);
} else {
return boost::none;
}
}
bool ValidatedTenancyScope::hasAuthenticatedUser() const {
return stdx::holds_alternative<UserName>(_tenantOrUser);
}
const UserName& ValidatedTenancyScope::authenticatedUser() const {
invariant(hasAuthenticatedUser());
return stdx::get<UserName>(_tenantOrUser);
}
const boost::optional<ValidatedTenancyScope>& ValidatedTenancyScope::get(OperationContext* opCtx) {
return validatedTenancyScopeDecoration(opCtx);
}
void ValidatedTenancyScope::set(OperationContext* opCtx,
boost::optional<ValidatedTenancyScope> token) {
validatedTenancyScopeDecoration(opCtx) = std::move(token);
}
ValidatedTenancyScope::ValidatedTenancyScope(BSONObj obj, TokenForTestingTag) {
auto authUserElem = obj[SecurityToken::kAuthenticatedUserFieldName];
uassert(ErrorCodes::BadValue,
"Invalid field(s) in token being signed",
(authUserElem.type() == Object) && (obj.nFields() == 1));
auto authUserObj = authUserElem.Obj();
ConstDataRange authUserCDR(authUserObj.objdata(), authUserObj.objsize());
// Placeholder algorithm.
auto sig = SHA256Block::computeHash({authUserCDR});
BSONObjBuilder signedToken(obj);
signedToken.appendBinData(SecurityToken::kSigFieldName, sig.size(), BinDataGeneral, sig.data());
_originalToken = signedToken.obj();
_tenantOrUser = UserName::parseFromBSONObj(authUserObj);
}
} // namespace mongo::auth
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