package com.lowagie.bc.asn1; import java.io.ByteArrayOutputStream; import java.io.IOException; /** * DER UniversalString object. */ public class DERUniversalString extends DERObject implements DERString { private static final char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; private byte[] string; /** * return a Universal String from the passed in object. * * @exception IllegalArgumentException if the object cannot be converted. */ public static DERUniversalString getInstance( Object obj) { if (obj == null || obj instanceof DERUniversalString) { return (DERUniversalString)obj; } if (obj instanceof ASN1OctetString) { return new DERUniversalString(((ASN1OctetString)obj).getOctets()); } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * return a Universal String from a tagged object. * * @param obj the tagged object holding the object we want * @param explicit true if the object is meant to be explicitly * tagged false otherwise. * @exception IllegalArgumentException if the tagged object cannot * be converted. */ public static DERUniversalString getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(obj.getObject()); } /** * basic constructor - byte encoded string. */ public DERUniversalString( byte[] string) { this.string = string; } public String getString() { StringBuffer buf = new StringBuffer("#"); ByteArrayOutputStream bOut = new ByteArrayOutputStream(); ASN1OutputStream aOut = new ASN1OutputStream(bOut); try { aOut.writeObject(this); } catch (IOException e) { throw new RuntimeException("internal error encoding BitString"); } byte[] string = bOut.toByteArray(); for (int i = 0; i != string.length; i++) { buf.append(table[(string[i] >>> 4) % 0xf]); buf.append(table[string[i] & 0xf]); } return buf.toString(); } public byte[] getOctets() { return string; } void encode( DEROutputStream out) throws IOException { out.writeEncoded(UNIVERSAL_STRING, this.getOctets()); } public boolean equals( Object o) { if ((o == null) || !(o instanceof DERUniversalString)) { return false; } return this.getString().equals(((DERUniversalString)o).getString()); } }