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 18package org.apache.harmony.security.x509; 19 20import java.io.IOException; 21import org.apache.harmony.security.asn1.ASN1OctetString; 22import org.apache.harmony.security.utils.Array; 23 24/** 25 * Subject Key Identifier Extension (OID = 2.5.29.14). 26 * 27 * The ASN.1 definition for extension is: 28 * 29 * <pre> 30 * id-ce-subjectKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 14 } 31 * 32 * SubjectKeyIdentifier ::= KeyIdentifier 33 * 34 * KeyIdentifier ::= OCTET STRING 35 * </pre> 36 * (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt) 37 */ 38public final class SubjectKeyIdentifier extends ExtensionValue { 39 40 // the value of key identifier 41 private final byte[] keyIdentifier; 42 43 /** 44 * Creates the object on the base of the value of key identifier. 45 */ 46 public SubjectKeyIdentifier(byte[] keyIdentifier) { 47 this.keyIdentifier = keyIdentifier; 48 } 49 50 /** 51 * Creates an object on the base of its encoded form. 52 */ 53 public static SubjectKeyIdentifier decode(byte[] encoding) 54 throws IOException { 55 SubjectKeyIdentifier res = new SubjectKeyIdentifier((byte[]) 56 ASN1OctetString.getInstance().decode(encoding)); 57 res.encoding = encoding; 58 return res; 59 } 60 61 /** 62 * The key identifier for this subject. 63 */ 64 public byte[] getKeyIdentifier() { 65 return keyIdentifier; 66 } 67 68 @Override public byte[] getEncoded() { 69 if (encoding == null) { 70 encoding = ASN1OctetString.getInstance().encode(keyIdentifier); 71 } 72 return encoding; 73 } 74 75 @Override public void dumpValue(StringBuilder sb, String prefix) { 76 sb.append(prefix).append("SubjectKeyIdentifier: [\n"); 77 sb.append(Array.toString(keyIdentifier, prefix)); 78 sb.append(prefix).append("]\n"); 79 } 80} 81