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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/rpc/metadata/logical_time_metadata.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/bson_extract.h"
namespace mongo {
namespace rpc {
namespace {
const char kClusterTimeFieldName[] = "clusterTime";
const char kSignatureFieldName[] = "signature";
const char kSignatureHashFieldName[] = "hash";
const char kSignatureKeyIdFieldName[] = "keyId";
} // unnamed namespace
LogicalTimeMetadata::LogicalTimeMetadata(SignedLogicalTime time) : _clusterTime(std::move(time)) {}
StatusWith<LogicalTimeMetadata> LogicalTimeMetadata::readFromMetadata(const BSONObj& metadata) {
return readFromMetadata(metadata.getField(fieldName()));
}
StatusWith<LogicalTimeMetadata> LogicalTimeMetadata::readFromMetadata(
const BSONElement& metadataElem) {
if (metadataElem.eoo()) {
return LogicalTimeMetadata();
}
const auto& obj = metadataElem.Obj();
Timestamp ts;
Status status = bsonExtractTimestampField(obj, kClusterTimeFieldName, &ts);
if (!status.isOK()) {
return status;
}
BSONElement signatureElem;
status = bsonExtractTypedField(obj, kSignatureFieldName, Object, &signatureElem);
if (!status.isOK()) {
return status;
}
const auto& signatureObj = signatureElem.Obj();
// Extract BinData type signature hash and construct a SHA1Block instance from it.
BSONElement hashElem;
status = bsonExtractTypedField(signatureObj, kSignatureHashFieldName, BinData, &hashElem);
if (!status.isOK()) {
return status;
}
int hashLength = 0;
auto rawBinSignature = hashElem.binData(hashLength);
BSONBinData proofBinData(rawBinSignature, hashLength, hashElem.binDataType());
auto proofStatus = SHA1Block::fromBinData(proofBinData);
if (!proofStatus.isOK()) {
return proofStatus.getStatus();
}
long long keyId;
status = bsonExtractIntegerField(signatureObj, kSignatureKeyIdFieldName, &keyId);
if (!status.isOK()) {
return status;
}
return LogicalTimeMetadata(
SignedLogicalTime(LogicalTime(ts), std::move(proofStatus.getValue()), keyId));
}
void LogicalTimeMetadata::writeToMetadata(BSONObjBuilder* metadataBuilder) const {
BSONObjBuilder subObjBuilder(metadataBuilder->subobjStart(fieldName()));
_clusterTime.getTime().asTimestamp().append(subObjBuilder.bb(), kClusterTimeFieldName);
BSONObjBuilder signatureObjBuilder(subObjBuilder.subobjStart(kSignatureFieldName));
// Cluster time metadata is only written when the LogicalTimeValidator is set, which
// means the cluster time should always have a proof.
invariant(_clusterTime.getProof());
_clusterTime.getProof()->appendAsBinData(signatureObjBuilder, kSignatureHashFieldName);
signatureObjBuilder.append(kSignatureKeyIdFieldName, _clusterTime.getKeyId());
signatureObjBuilder.doneFast();
subObjBuilder.doneFast();
}
const SignedLogicalTime& LogicalTimeMetadata::getSignedTime() const {
return _clusterTime;
}
} // namespace rpc
} // namespace mongo
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