1 /* 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.security.x509; 27 28 import java.io.IOException; 29 import java.io.InputStream; 30 import java.io.OutputStream; 31 import java.util.Enumeration; 32 33 import sun.security.util.*; 34 35 /** 36 * This class defines the AlgorithmId for the Certificate. 37 * 38 * @author Amit Kapoor 39 * @author Hemma Prafullchandra 40 */ 41 public class CertificateAlgorithmId implements CertAttrSet<String> { 42 private AlgorithmId algId; 43 44 /** 45 * Identifier for this attribute, to be used with the 46 * get, set, delete methods of Certificate, x509 type. 47 */ 48 public static final String IDENT = "x509.info.algorithmID"; 49 /** 50 * Sub attributes name for this CertAttrSet. 51 */ 52 public static final String NAME = "algorithmID"; 53 54 /** 55 * Identifier to be used with get, set, and delete methods. When 56 * using this identifier the associated object being passed in or 57 * returned is an instance of AlgorithmId. 58 * @see sun.security.x509.AlgorithmId 59 */ 60 public static final String ALGORITHM = "algorithm"; 61 62 /** 63 * Default constructor for the certificate attribute. 64 * 65 * @param algId the Algorithm identifier 66 */ 67 public CertificateAlgorithmId(AlgorithmId algId) { 68 this.algId = algId; 69 } 70 71 /** 72 * Create the object, decoding the values from the passed DER stream. 73 * 74 * @param in the DerInputStream to read the serial number from. 75 * @exception IOException on decoding errors. 76 */ 77 public CertificateAlgorithmId(DerInputStream in) throws IOException { 78 DerValue val = in.getDerValue(); 79 algId = AlgorithmId.parse(val); 80 } 81 82 /** 83 * Create the object, decoding the values from the passed stream. 84 * 85 * @param in the InputStream to read the serial number from. 86 * @exception IOException on decoding errors. 87 */ 88 public CertificateAlgorithmId(InputStream in) throws IOException { 89 DerValue val = new DerValue(in); 90 algId = AlgorithmId.parse(val); 91 } 92 93 /** 94 * Return the algorithm identifier as user readable string. 95 */ 96 public String toString() { 97 if (algId == null) return ""; 98 return (algId.toString() + 99 ", OID = " + (algId.getOID()).toString() + "\n"); 100 } 101 102 /** 103 * Encode the algorithm identifier in DER form to the stream. 104 * 105 * @param out the DerOutputStream to marshal the contents to. 106 * @exception IOException on errors. 107 */ 108 public void encode(OutputStream out) throws IOException { 109 DerOutputStream tmp = new DerOutputStream(); 110 algId.encode(tmp); 111 112 out.write(tmp.toByteArray()); 113 } 114 115 /** 116 * Set the attribute value. 117 */ 118 public void set(String name, Object obj) throws IOException { 119 if (!(obj instanceof AlgorithmId)) { 120 throw new IOException("Attribute must be of type AlgorithmId."); 121 } 122 if (name.equalsIgnoreCase(ALGORITHM)) { 123 algId = (AlgorithmId)obj; 124 } else { 125 throw new IOException("Attribute name not recognized by " + 126 "CertAttrSet:CertificateAlgorithmId."); 127 } 128 } 129 130 /** 131 * Get the attribute value. 132 */ 133 public AlgorithmId get(String name) throws IOException { 134 if (name.equalsIgnoreCase(ALGORITHM)) { 135 return (algId); 136 } else { 137 throw new IOException("Attribute name not recognized by " + 138 "CertAttrSet:CertificateAlgorithmId."); 139 } 140 } 141 142 /** 143 * Delete the attribute value. 144 */ 145 public void delete(String name) throws IOException { 146 if (name.equalsIgnoreCase(ALGORITHM)) { 147 algId = null; 148 } else { 149 throw new IOException("Attribute name not recognized by " + 150 "CertAttrSet:CertificateAlgorithmId."); 151 } 152 } 153 154 /** 155 * Return an enumeration of names of attributes existing within this 156 * attribute. 157 */ 158 public Enumeration<String> getElements() { 159 AttributeNameEnumeration elements = new AttributeNameEnumeration(); 160 elements.addElement(ALGORITHM); 161 return (elements.elements()); 162 } 163 164 /** 165 * Return the name of this attribute. 166 */ 167 public String getName() { 168 return (NAME); 169 } 170 } 171
