| // 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 ( |
| pb "github.com/apache/pulsar-client-go/pulsar/internal/pulsar_proto" |
| ) |
| |
| // MessageMetadataSupplier wrapper implementation around message metadata |
| type MessageMetadataSupplier interface { |
| // EncryptionKeys read all the encryption keys from the MessageMetadata |
| EncryptionKeys() []EncryptionKeyInfo |
| |
| // UpsertEncryptionKey add new or update existing EncryptionKeys in to the MessageMetadata |
| UpsertEncryptionKey(EncryptionKeyInfo) |
| |
| // EncryptionParam read the ecryption parameter from the MessageMetadata |
| EncryptionParam() []byte |
| |
| // SetEncryptionParam set encryption parameter in to the MessageMetadata |
| SetEncryptionParam([]byte) |
| } |
| |
| type MessageMetadata struct { |
| messageMetadata *pb.MessageMetadata |
| } |
| |
| func NewMessageMetadataSupplier(messageMetadata *pb.MessageMetadata) MessageMetadataSupplier { |
| return &MessageMetadata{ |
| messageMetadata: messageMetadata, |
| } |
| } |
| |
| func (m *MessageMetadata) EncryptionKeys() []EncryptionKeyInfo { |
| if m.messageMetadata != nil { |
| encInfo := []EncryptionKeyInfo{} |
| for _, k := range m.messageMetadata.EncryptionKeys { |
| key := NewEncryptionKeyInfo(k.GetKey(), k.GetValue(), getKeyMetaMap(k.GetMetadata())) |
| encInfo = append(encInfo, *key) |
| } |
| return encInfo |
| } |
| return nil |
| } |
| |
| func (m *MessageMetadata) UpsertEncryptionKey(keyInfo EncryptionKeyInfo) { |
| if m.messageMetadata != nil { |
| idx := m.encryptionKeyPresent(keyInfo) |
| newKey := &pb.EncryptionKeys{ |
| Key: &keyInfo.name, |
| Value: keyInfo.Key(), |
| Metadata: getKeyMeta(keyInfo.Metadata()), |
| } |
| |
| if idx >= 0 { |
| m.messageMetadata.EncryptionKeys[idx] = newKey |
| } else { |
| m.messageMetadata.EncryptionKeys = append(m.messageMetadata.EncryptionKeys, newKey) |
| } |
| } |
| } |
| |
| func (m *MessageMetadata) EncryptionParam() []byte { |
| if m.messageMetadata != nil { |
| return m.messageMetadata.EncryptionParam |
| } |
| return nil |
| } |
| |
| func (m *MessageMetadata) SetEncryptionParam(param []byte) { |
| if m.messageMetadata != nil { |
| m.messageMetadata.EncryptionParam = param |
| } |
| } |
| |
| func (m *MessageMetadata) encryptionKeyPresent(keyInfo EncryptionKeyInfo) int { |
| if len(m.messageMetadata.EncryptionKeys) > 0 { |
| for idx, k := range m.messageMetadata.EncryptionKeys { |
| if k.GetKey() == keyInfo.Name() { |
| return idx |
| } |
| } |
| } |
| return -1 |
| } |
| |
| func getKeyMeta(metaMap map[string]string) []*pb.KeyValue { |
| if len(metaMap) > 0 { |
| var meta []*pb.KeyValue |
| for k, v := range metaMap { |
| meta = append(meta, &pb.KeyValue{Key: &k, Value: &v}) |
| } |
| return meta |
| } |
| return nil |
| } |
| |
| func getKeyMetaMap(keyValues []*pb.KeyValue) map[string]string { |
| if keyValues != nil { |
| meta := map[string]string{} |
| for _, kv := range keyValues { |
| meta[kv.GetKey()] = kv.GetValue() |
| } |
| return meta |
| } |
| return nil |
| } |