generalname.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 232 行

/*
 * @(#)GeneralName.java	1.20 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program 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.   
 *   
 * This program 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 at /legal/license.txt).   
 *   
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */

package sun.security.x509;

import java.io.IOException;

import sun.security.util.*;

/**
 * This class implements the ASN.1 GeneralName object class.
 * <p>
 * The ASN.1 syntax for this is:
 * <pre>
 * GeneralName ::= CHOICE {
 *    otherName                       [0]     OtherName,
 *    rfc822Name                      [1]     IA5String,
 *    dNSName                         [2]     IA5String,
 *    x400Address                     [3]     ORAddress,
 *    directoryName                   [4]     Name,
 *    ediPartyName                    [5]     EDIPartyName,
 *    uniformResourceIdentifier       [6]     IA5String,
 *    iPAddress                       [7]     OCTET STRING,
 *    registeredID                    [8]     OBJECT IDENTIFIER
 * }
 * </pre>
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 * @version 1.20, 10/10/06
 */
public class GeneralName {

    // Private data members
    private GeneralNameInterface name = null;

    /**
     * Default constructor for the class.
     *
     * @param name the selected CHOICE from the list.
     * @throws NullPointerException if name is null
     */
    public GeneralName(GeneralNameInterface name) {
	if (name == null) {
	    throw new NullPointerException("GeneralName must not be null");
	}
        this.name = name;
    }

    /**
     * Create the object from its DER encoded value.
     *
     * @param encName the DER encoded GeneralName.
     */
    public GeneralName(DerValue encName) throws IOException {
        short tag = (byte)(encName.tag & 0x1f);

        // All names except for NAME_DIRECTORY should be encoded with the 
	// IMPLICIT tag. 
        switch (tag) {
        case GeneralNameInterface.NAME_ANY:
            if (encName.isContextSpecific() && encName.isConstructed()) {
                encName.resetTag(DerValue.tag_Sequence);
                name = new OtherName(encName);
            } else {
	        throw new IOException("Invalid encoding of Other-Name");
	    }
	    break;

        case GeneralNameInterface.NAME_RFC822:
            if (encName.isContextSpecific() && !encName.isConstructed()) {
                encName.resetTag(DerValue.tag_IA5String);
	        name = new RFC822Name(encName);
            } else {
	        throw new IOException("Invalid encoding of RFC822 name");
	    }
	    break;

        case GeneralNameInterface.NAME_DNS:
            if (encName.isContextSpecific() && !encName.isConstructed()) {
                encName.resetTag(DerValue.tag_IA5String);
	        name = new DNSName(encName);
            } else {
	        throw new IOException("Invalid encoding of DNS name");
	    }
	    break;

        case GeneralNameInterface.NAME_URI:
            if (encName.isContextSpecific() && !encName.isConstructed()) {
                encName.resetTag(DerValue.tag_IA5String);
	        name = new URIName(encName);
            } else {
	        throw new IOException("Invalid encoding of URI");
	    }
	    break;

        case GeneralNameInterface.NAME_IP:
            if (encName.isContextSpecific() && !encName.isConstructed()) {
                encName.resetTag(DerValue.tag_OctetString);
	        name = new IPAddressName(encName);
            } else {
	        throw new IOException("Invalid encoding of IP address");
	    }
	    break;

        case GeneralNameInterface.NAME_OID:
            if (encName.isContextSpecific() && !encName.isConstructed()) {
                encName.resetTag(DerValue.tag_ObjectId);
	        name = new OIDName(encName);
            } else {
	        throw new IOException("Invalid encoding of OID name");
	    }
	    break;

        case GeneralNameInterface.NAME_DIRECTORY:
            if (encName.isContextSpecific() && encName.isConstructed()) {
                name = new X500Name(encName.getData());
            } else {
	        throw new IOException("Invalid encoding of Directory name");
	    }
	    break;

        case GeneralNameInterface.NAME_EDI:
            if (encName.isContextSpecific() && encName.isConstructed()) {
                encName.resetTag(DerValue.tag_Sequence);
                name = new EDIPartyName(encName);
            } else {
	        throw new IOException("Invalid encoding of EDI name");
	    }
	    break;

        default:
	    throw new IOException("Unrecognized GeneralName tag, ("
                                  + tag +")");
        }
    }

    /**
     * Return the type of the general name.
     */
    public int getType() {
        return name.getType();
    }

    /**
     * Return the GeneralNameInterface name.
     */
    public GeneralNameInterface getName() {
	//NOTE: May want to consider cloning this
	return name;
    }

    /**
     * Return the name as user readable string
     */
    public String toString() {
        return name.toString();
    }

    /**
     * Compare this GeneralName with another
     *
     * @param other GeneralName to compare to this
     * @returns true if match
     */
    public boolean equals(Object other) {
	if (this == other) {
	    return true;
	}
	if (!(other instanceof GeneralName))
	    return false;
	GeneralNameInterface otherGNI = ((GeneralName)other).name;
	try {
	    return name.constrains(otherGNI) == GeneralNameInterface.NAME_MATCH;
	} catch (UnsupportedOperationException ioe) {
	    return false;
	}
    }

    /**
     * Encode the name to the specified DerOutputStream.
     *
     * @param out the DerOutputStream to encode the the GeneralName to.
     * @exception IOException on encoding errors.
     */
    public void encode(DerOutputStream out) throws IOException {
        DerOutputStream tmp = new DerOutputStream();
        name.encode(tmp);
        int nameType = name.getType();
        if (nameType == GeneralNameInterface.NAME_ANY ||
            nameType == GeneralNameInterface.NAME_X400 ||
            nameType == GeneralNameInterface.NAME_EDI) {

            // implicit, constructed form
            out.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT,
                              true, (byte)nameType), tmp);
        } else if (nameType == GeneralNameInterface.NAME_DIRECTORY) {
	    // explicit, constructed form since underlying tag is CHOICE
	    // (see X.680 section 30.6, part c)
   	    out.write(DerValue.createTag(DerValue.TAG_CONTEXT,
                                         true, (byte)nameType), tmp);
        } else { 
	    // implicit, primitive form
            out.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT,
                              false, (byte)nameType), tmp);
	}
    }
}