package org.bouncycastle.asn1; import java.io.IOException; /** * DER UniversalString object. */ public class DERUniversalString extends DERObject implements DERString { byte[] string; char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; /** * 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; } /** * UniversalStrings have characters which are 4 bytes long - for the * moment we just return them in Hex... */ public String getString() { StringBuffer buf = new StringBuffer(); 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()); } }