| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package crypto |
| |
| import ( |
| "fmt" |
| |
| "github.com/apache/pulsar-client-go/pulsar/crypto" |
| pb "github.com/apache/pulsar-client-go/pulsar/internal/pulsar_proto" |
| "github.com/apache/pulsar-client-go/pulsar/log" |
| ) |
| |
| type consumerDecryptor struct { |
| keyReader crypto.KeyReader |
| messageCrypto crypto.MessageCrypto |
| logger log.Logger |
| } |
| |
| func NewConsumerDecryptor(keyReader crypto.KeyReader, |
| messageCrypto crypto.MessageCrypto, |
| logger log.Logger) Decryptor { |
| return &consumerDecryptor{ |
| keyReader: keyReader, |
| messageCrypto: messageCrypto, |
| logger: logger, |
| } |
| } |
| |
| func (d *consumerDecryptor) Decrypt(payload []byte, |
| msgID *pb.MessageIdData, |
| msgMetadata *pb.MessageMetadata) ([]byte, error) { |
| // encryption keys are not present in message metadta, no need decrypt the payload |
| if len(msgMetadata.GetEncryptionKeys()) == 0 { |
| return payload, nil |
| } |
| |
| // KeyReader interface is not implemented |
| if d.keyReader == nil { |
| return payload, fmt.Errorf("KeyReader interface is not implemented") |
| } |
| |
| return d.messageCrypto.Decrypt(crypto.NewMessageMetadataSupplier(msgMetadata), |
| payload, |
| d.keyReader) |
| } |