asn1oid.java

来自「一个非常好的ssh客户端实现」· Java 代码 · 共 96 行

/******************************************************************************
 *
 * Copyright (c) 1999-2003 AppGate Network Security AB. All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code as
 * defined in and that are subject to the MindTerm Public Source License,
 * Version 2.0, (the 'License'). You may not use this file except in compliance
 * with the License.
 * 
 * You should have received a copy of the MindTerm Public Source License
 * along with this software; see the file LICENSE.  If not, write to
 * AppGate Network Security AB, Otterhallegatan 2, SE-41118 Goteborg, SWEDEN
 *
 *****************************************************************************/

package com.mindbright.asn1;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;

public class ASN1OID extends ASN1Object {

    private int[] value;

    public ASN1OID() {
	super(ASN1.TAG_OID);
    }

    public int encodeValue(ASN1Encoder encoder, OutputStream out)
    	throws IOException
    {
	return encoder.encodeOID(out, value);
    }

    public void decodeValue(ASN1Decoder decoder, InputStream in, int len)
	throws IOException
    {
	setValue(decoder.decodeOID(in, len));
    }

    public void setValue(int[] value) {
	setValue();
	this.value = value;
    }

    public int[] getValue() {
	return value;
    }

    public void setString(String oid) throws NumberFormatException {
	int[] value = new int[(oid.length() / 2) + 1];
	int i = 0;
	int l = 0;
	int r = 0;
	while(r < oid.length()) {
	    r = oid.indexOf('.', r + 1);
	    if(r == -1) {
		r = oid.length();
	    }
	    value[i++] = Integer.parseInt(oid.substring(l, r));
	    l = r + 1;
	}
	int[] tmp = value;
	value = new int[i];
	System.arraycopy(tmp, 0, value, 0, i);
	setValue(value);
    }

    public String getString() {
	StringBuffer buf = new StringBuffer();
	for(int i = 0; i < value.length - 1; i++) {
	    buf.append(value[i] + ".");
	}
	buf.append(value[value.length - 1]);
	return buf.toString();
    }

    public boolean equals(Object obj) {
	if(obj == null || !(obj instanceof ASN1OID)) {
	    return false;
	}
	ASN1OID other = (ASN1OID)obj;
	return getString().equals(other.getString());
    }

    public int hashCode() {
	int hc = super.hashCode();
	if(value != null) {
	    hc = getString().hashCode();
	}
	return hc;
    }

}