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/* see bouncycastle_license.txt */
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());
}
}
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