| /* |
| * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.x509; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Enumeration; |
| |
| import sun.security.util.*; |
| |
| /** |
| * This class defines the version of the X509 Certificate. |
| * |
| * @author Amit Kapoor |
| * @author Hemma Prafullchandra |
| * @see CertAttrSet |
| */ |
| public class CertificateVersion implements CertAttrSet<String> { |
| /** |
| * X509Certificate Version 1 |
| */ |
| public static final int V1 = 0; |
| /** |
| * X509Certificate Version 2 |
| */ |
| public static final int V2 = 1; |
| /** |
| * X509Certificate Version 3 |
| */ |
| public static final int V3 = 2; |
| /** |
| * Identifier for this attribute, to be used with the |
| * get, set, delete methods of Certificate, x509 type. |
| */ |
| public static final String IDENT = "x509.info.version"; |
| /** |
| * Sub attributes name for this CertAttrSet. |
| */ |
| public static final String NAME = "version"; |
| public static final String VERSION = "number"; |
| |
| // Private data members |
| int version = V1; |
| |
| // Returns the version number. |
| private int getVersion() { |
| return(version); |
| } |
| |
| // Construct the class from the passed DerValue |
| private void construct(DerValue derVal) throws IOException { |
| if (derVal.isConstructed() && derVal.isContextSpecific()) { |
| derVal = derVal.data.getDerValue(); |
| version = derVal.getInteger(); |
| if (derVal.data.available() != 0) { |
| throw new IOException("X.509 version, bad format"); |
| } |
| } |
| } |
| |
| /** |
| * The default constructor for this class, |
| * sets the version to 0 (i.e. X.509 version 1). |
| */ |
| public CertificateVersion() { |
| version = V1; |
| } |
| |
| /** |
| * The constructor for this class for the required version. |
| * |
| * @param version the version for the certificate. |
| * @exception IOException if the version is not valid. |
| */ |
| public CertificateVersion(int version) throws IOException { |
| |
| // check that it is a valid version |
| if (version == V1 || version == V2 || version == V3) |
| this.version = version; |
| else { |
| throw new IOException("X.509 Certificate version " + |
| version + " not supported.\n"); |
| } |
| } |
| |
| /** |
| * Create the object, decoding the values from the passed DER stream. |
| * |
| * @param in the DerInputStream to read the CertificateVersion from. |
| * @exception IOException on decoding errors. |
| */ |
| public CertificateVersion(DerInputStream in) throws IOException { |
| version = V1; |
| DerValue derVal = in.getDerValue(); |
| |
| construct(derVal); |
| } |
| |
| /** |
| * Create the object, decoding the values from the passed stream. |
| * |
| * @param in the InputStream to read the CertificateVersion from. |
| * @exception IOException on decoding errors. |
| */ |
| public CertificateVersion(InputStream in) throws IOException { |
| version = V1; |
| DerValue derVal = new DerValue(in); |
| |
| construct(derVal); |
| } |
| |
| /** |
| * Create the object, decoding the values from the passed DerValue. |
| * |
| * @param val the Der encoded value. |
| * @exception IOException on decoding errors. |
| */ |
| public CertificateVersion(DerValue val) throws IOException { |
| version = V1; |
| |
| construct(val); |
| } |
| |
| /** |
| * Return the version number of the certificate. |
| */ |
| public String toString() { |
| return("Version: V" + (version+1)); |
| } |
| |
| /** |
| * Encode the CertificateVersion period in DER form to the stream. |
| * |
| * @param out the OutputStream to marshal the contents to. |
| * @exception IOException on errors. |
| */ |
| public void encode(OutputStream out) throws IOException { |
| // Nothing for default |
| if (version == V1) { |
| return; |
| } |
| DerOutputStream tmp = new DerOutputStream(); |
| tmp.putInteger(version); |
| |
| DerOutputStream seq = new DerOutputStream(); |
| seq.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0), |
| tmp); |
| |
| out.write(seq.toByteArray()); |
| } |
| |
| /** |
| * Set the attribute value. |
| */ |
| public void set(String name, Object obj) throws IOException { |
| if (!(obj instanceof Integer)) { |
| throw new IOException("Attribute must be of type Integer."); |
| } |
| if (name.equalsIgnoreCase(VERSION)) { |
| version = ((Integer)obj).intValue(); |
| } else { |
| throw new IOException("Attribute name not recognized by " + |
| "CertAttrSet: CertificateVersion."); |
| } |
| } |
| |
| /** |
| * Get the attribute value. |
| */ |
| public Integer get(String name) throws IOException { |
| if (name.equalsIgnoreCase(VERSION)) { |
| return(getVersion()); |
| } else { |
| throw new IOException("Attribute name not recognized by " + |
| "CertAttrSet: CertificateVersion."); |
| } |
| } |
| |
| /** |
| * Delete the attribute value. |
| */ |
| public void delete(String name) throws IOException { |
| if (name.equalsIgnoreCase(VERSION)) { |
| version = V1; |
| } else { |
| throw new IOException("Attribute name not recognized by " + |
| "CertAttrSet: CertificateVersion."); |
| } |
| } |
| |
| /** |
| * Return an enumeration of names of attributes existing within this |
| * attribute. |
| */ |
| public Enumeration<String> getElements() { |
| AttributeNameEnumeration elements = new AttributeNameEnumeration(); |
| elements.addElement(VERSION); |
| |
| return (elements.elements()); |
| } |
| |
| /** |
| * Return the name of this attribute. |
| */ |
| public String getName() { |
| return(NAME); |
| } |
| |
| /** |
| * Compare versions. |
| */ |
| public int compare(int vers) { |
| return(version - vers); |
| } |
| } |