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Java example source code file (InhibitAnyPolicyExtension.java)

This example Java source code file (InhibitAnyPolicyExtension.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

anypolicy_id, attribute, attributenameenumeration, certattrset\:inhibitanypolicy, debug, deroutputstream, inhibitanypolicy, inhibitanypolicyextension, integer, invalid, ioexception, objectidentifier, skip_certs, string, util

The InhibitAnyPolicyExtension.java Java example source code

/*
 * Copyright (c) 2000, 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.OutputStream;
import java.util.Enumeration;

import sun.security.util.Debug;
import sun.security.util.DerOutputStream;
import sun.security.util.DerValue;
import sun.security.util.ObjectIdentifier;

/**
 * This class represents the Inhibit Any-Policy Extension.
 *
 * <p>The inhibit any-policy extension can be used in certificates issued
 * to CAs. The inhibit any-policy indicates that the special any-policy
 * OID, with the value {2 5 29 32 0}, is not considered an explicit
 * match for other certificate policies.  The value indicates the number
 * of additional certificates that may appear in the path before any-
 * policy is no longer permitted.  For example, a value of one indicates
 * that any-policy may be processed in certificates issued by the sub-
 * ject of this certificate, but not in additional certificates in the
 * path.
 * <p>
 * This extension MUST be critical.
 * <p>
 * The ASN.1 syntax for this extension is:
 * <code>
 * id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::=  { id-ce 54 }
 *
 * InhibitAnyPolicy ::= SkipCerts
 *
 * SkipCerts ::= INTEGER (0..MAX)
 * </pre>
 * @author Anne Anderson
 * @see CertAttrSet
 * @see Extension
 */
public class InhibitAnyPolicyExtension extends Extension
implements CertAttrSet<String> {

    private static final Debug debug = Debug.getInstance("certpath");

    /**
     * Identifier for this attribute, to be used with the
     * get, set, delete methods of Certificate, x509 type.
     */
    public static final String IDENT = "x509.info.extensions.InhibitAnyPolicy";

    /**
     * Object identifier for "any-policy"
     */
    public static ObjectIdentifier AnyPolicy_Id;
    static {
        try {
            AnyPolicy_Id = new ObjectIdentifier("2.5.29.32.0");
        } catch (IOException ioe) {
            // Should not happen
        }
    }

    /**
     * Attribute names.
     */
    public static final String NAME = "InhibitAnyPolicy";
    public static final String SKIP_CERTS = "skip_certs";

    // Private data members
    private int skipCerts = Integer.MAX_VALUE;

    // Encode this extension value
    private void encodeThis() throws IOException {
        DerOutputStream out = new DerOutputStream();
        out.putInteger(skipCerts);
        this.extensionValue = out.toByteArray();
    }

    /**
     * Default constructor for this object.
     *
     * @param skipCerts specifies the depth of the certification path.
     *                  Use value of -1 to request unlimited depth.
     */
    public InhibitAnyPolicyExtension(int skipCerts) throws IOException {
        if (skipCerts < -1)
            throw new IOException("Invalid value for skipCerts");
        if (skipCerts == -1)
            this.skipCerts = Integer.MAX_VALUE;
        else
            this.skipCerts = skipCerts;
        this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;
        critical = true;
        encodeThis();
    }

    /**
     * Create the extension from the passed DER encoded value of the same.
     *
     * @param critical criticality flag to use.  Must be true for this
     *                 extension.
     * @param value a byte array holding the DER-encoded extension value.
     * @exception ClassCastException if value is not an array of bytes
     * @exception IOException on error.
     */
    public InhibitAnyPolicyExtension(Boolean critical, Object value)
        throws IOException {

        this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;

        if (!critical.booleanValue())
            throw new IOException("Criticality cannot be false for " +
                                  "InhibitAnyPolicy");
        this.critical = critical.booleanValue();

        this.extensionValue = (byte[]) value;
        DerValue val = new DerValue(this.extensionValue);
        if (val.tag != DerValue.tag_Integer)
            throw new IOException("Invalid encoding of InhibitAnyPolicy: "
                                  + "data not integer");

        if (val.data == null)
            throw new IOException("Invalid encoding of InhibitAnyPolicy: "
                                  + "null data");
        int skipCertsValue = val.getInteger();
        if (skipCertsValue < -1)
            throw new IOException("Invalid value for skipCerts");
        if (skipCertsValue == -1) {
            this.skipCerts = Integer.MAX_VALUE;
        } else {
            this.skipCerts = skipCertsValue;
        }
    }

     /**
      * Return user readable form of extension.
      */
     public String toString() {
         String s = super.toString() + "InhibitAnyPolicy: " + skipCerts + "\n";
         return s;
     }

     /**
      * Encode this extension value to the output stream.
      *
      * @param out the DerOutputStream to encode the extension to.
      */
     public void encode(OutputStream out) throws IOException {
         DerOutputStream tmp = new DerOutputStream();
         if (extensionValue == null) {
             this.extensionId = PKIXExtensions.InhibitAnyPolicy_Id;
             critical = true;
             encodeThis();
         }
         super.encode(tmp);

         out.write(tmp.toByteArray());
     }

    /**
     * Set the attribute value.
     *
     * @param name name of attribute to set. Must be SKIP_CERTS.
     * @param obj  value to which attribute is to be set.  Must be Integer
     *             type.
     * @throws IOException on error
     */
    public void set(String name, Object obj) throws IOException {
        if (name.equalsIgnoreCase(SKIP_CERTS)) {
            if (!(obj instanceof Integer))
                throw new IOException("Attribute value should be of type Integer.");
            int skipCertsValue = ((Integer)obj).intValue();
            if (skipCertsValue < -1)
                throw new IOException("Invalid value for skipCerts");
            if (skipCertsValue == -1) {
                skipCerts = Integer.MAX_VALUE;
            } else {
                skipCerts = skipCertsValue;
            }
        } else
            throw new IOException("Attribute name not recognized by " +
                                  "CertAttrSet:InhibitAnyPolicy.");
        encodeThis();
    }

    /**
     * Get the attribute value.
     *
     * @param name name of attribute to get.  Must be SKIP_CERTS.
     * @returns value of the attribute.  In this case it will be of type
     *          Integer.
     * @throws IOException on error
     */
    public Integer get(String name) throws IOException {
        if (name.equalsIgnoreCase(SKIP_CERTS))
            return (new Integer(skipCerts));
        else
            throw new IOException("Attribute name not recognized by " +
                                  "CertAttrSet:InhibitAnyPolicy.");
    }

    /**
     * Delete the attribute value.
     *
     * @param name name of attribute to delete. Must be SKIP_CERTS.
     * @throws IOException on error.  In this case, IOException will always be
     *                     thrown, because the only attribute, SKIP_CERTS, is
     *                     required.
     */
    public void delete(String name) throws IOException {
        if (name.equalsIgnoreCase(SKIP_CERTS))
            throw new IOException("Attribute " + SKIP_CERTS +
                                  " may not be deleted.");
        else
            throw new IOException("Attribute name not recognized by " +
                                  "CertAttrSet:InhibitAnyPolicy.");
    }

    /**
     * Return an enumeration of names of attributes existing within this
     * attribute.
     *
     * @returns enumeration of elements
     */
    public Enumeration<String> getElements() {
        AttributeNameEnumeration elements = new AttributeNameEnumeration();
        elements.addElement(SKIP_CERTS);
        return (elements.elements());
    }

    /**
     * Return the name of this attribute.
     *
     * @returns name of attribute.
     */
    public String getName() {
        return (NAME);
    }
}

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