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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.shardingsphere.db.protocol.opengauss.packet.authentication;
19  
20  import org.apache.shardingsphere.db.protocol.opengauss.constant.OpenGaussProtocolVersion;
21  import org.apache.shardingsphere.db.protocol.postgresql.packet.identifier.PostgreSQLIdentifierPacket;
22  import org.apache.shardingsphere.db.protocol.postgresql.packet.identifier.PostgreSQLIdentifierTag;
23  import org.apache.shardingsphere.db.protocol.postgresql.packet.identifier.PostgreSQLMessagePacketType;
24  import org.apache.shardingsphere.db.protocol.postgresql.payload.PostgreSQLPacketPayload;
25  
26  /**
27   * Authentication request SCRAM SHA-256 for openGauss.
28   */
29  public final class OpenGaussAuthenticationSCRAMSha256Packet extends PostgreSQLIdentifierPacket {
30      
31      private static final int AUTH_REQ_SHA256 = 10;
32      
33      private static final int PASSWORD_STORED_METHOD_SHA256 = 2;
34      
35      private final int version;
36      
37      private final int serverIteration;
38      
39      private final OpenGaussAuthenticationHexData authHexData;
40      
41      private final String serverSignature;
42      
43      public OpenGaussAuthenticationSCRAMSha256Packet(final int version, final int serverIteration, final OpenGaussAuthenticationHexData authHexData, final String password) {
44          this.version = version;
45          this.serverIteration = serverIteration;
46          this.authHexData = authHexData;
47          serverSignature = version >= OpenGaussProtocolVersion.PROTOCOL_350.getVersion() ? "" : OpenGaussMacCalculator.requestServerMac(password, authHexData, serverIteration);
48      }
49      
50      @Override
51      protected void write(final PostgreSQLPacketPayload payload) {
52          payload.writeInt4(AUTH_REQ_SHA256);
53          payload.writeInt4(PASSWORD_STORED_METHOD_SHA256);
54          payload.writeBytes(authHexData.getSalt().getBytes());
55          payload.writeBytes(authHexData.getNonce().getBytes());
56          if (version < OpenGaussProtocolVersion.PROTOCOL_350.getVersion()) {
57              payload.writeBytes(serverSignature.getBytes());
58          }
59          if (OpenGaussProtocolVersion.PROTOCOL_351.getVersion() == version) {
60              payload.writeInt4(serverIteration);
61          }
62      }
63      
64      @Override
65      public PostgreSQLIdentifierTag getIdentifier() {
66          return PostgreSQLMessagePacketType.AUTHENTICATION_REQUEST;
67      }
68  }