/**
* Copyright (C) 2017 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 .
*
* 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/platform/basic.h"
#include "mongo/db/keys_collection_manager_direct.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/logical_time.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
namespace mongo {
namespace {
const char kLogicalTimeKeysCollection[] = "admin.system.keys";
const int kMaxCachedKeys = 20;
} // namespace
KeysCollectionManagerDirect::KeysCollectionManagerDirect(std::string purpose,
Seconds keyValidForInterval)
: _purpose(std::move(purpose)),
_keyValidForInterval(keyValidForInterval),
_cache(kMaxCachedKeys) {}
StatusWith KeysCollectionManagerDirect::getKeyForValidation(
OperationContext* opCtx, long long keyId, const LogicalTime& forThisTime) {
// First, attempt to find the key in our cache.
{
stdx::lock_guard lk(_mutex);
auto it = _cache.find(keyId);
if (it != _cache.end()) {
return it->second;
}
}
// Query admin.system.keys for an active key with this id.
DBDirectClient client(opCtx);
BSONObjBuilder queryBuilder;
queryBuilder.append("purpose", _purpose);
queryBuilder.append("_id", keyId);
queryBuilder.append("expiresAt", BSON("$gt" << forThisTime.asTimestamp()));
auto cursor = client.query(KeysCollectionDocument::ConfigNS, queryBuilder.obj());
if (!cursor->more()) {
return {ErrorCodes::KeyNotFound, "Could not find matching key"};
}
// Parse the key.
auto res = KeysCollectionDocument::fromBSON(cursor->next());
if (!res.isOK()) {
return res.getStatus();
}
// Add to our cache.
{
stdx::lock_guard lk(_mutex);
_cache.add(keyId, res.getValue());
}
return res.getValue();
}
StatusWith KeysCollectionManagerDirect::getKeyForSigning(
OperationContext* opCtx, const LogicalTime& forThisTime) {
// Search through the cache for active keys.
{
stdx::lock_guard lk(_mutex);
for (auto& it : _cache) {
auto keyDoc = it.second;
auto expiration = keyDoc.getExpiresAt();
if (expiration > forThisTime) {
return keyDoc;
}
}
}
// Query admin.system.keys for active keys.
DBDirectClient client(opCtx);
BSONObjBuilder queryBuilder;
queryBuilder.append("purpose", _purpose);
queryBuilder.append("expiresAt", BSON("$gt" << forThisTime.asTimestamp()));
auto cursor = client.query(KeysCollectionDocument::ConfigNS, queryBuilder.obj());
if (!cursor->more()) {
return {ErrorCodes::KeyNotFound, "Could not find an active key for signing"};
}
// Parse and return the key.
auto res = KeysCollectionDocument::fromBSON(cursor->next());
if (!res.isOK()) {
return res.getStatus();
}
auto keyDoc = res.getValue();
// Add to our cache.
{
stdx::lock_guard lk(_mutex);
_cache.add(keyDoc.getKeyId(), keyDoc);
}
return keyDoc;
}
} // namespace mongo