package org.bouncycastle.asn1.x509;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Vector;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.DEROctetString;
/**
* Generator for X.509 extensions
*/
public class ExtensionsGenerator
{
private Hashtable extensions = new Hashtable();
private Vector extOrdering = new Vector();
/**
* Reset the generator
*/
public void reset()
{
extensions = new Hashtable();
extOrdering = new Vector();
}
/**
* Add an extension with the given oid and the passed in value to be included
* in the OCTET STRING associated with the extension.
*
* @param oid OID for the extension.
* @param critical true if critical, false otherwise.
* @param value the ASN.1 object to be included in the extension.
*/
public void addExtension(
ASN1ObjectIdentifier oid,
boolean critical,
ASN1Encodable value)
throws IOException
{
this.addExtension(oid, critical, value.toASN1Primitive().getEncoded(ASN1Encoding.DER));
}
/**
* Add an extension with the given oid and the passed in byte array to be wrapped in the
* OCTET STRING associated with the extension.
*
* @param oid OID for the extension.
* @param critical true if critical, false otherwise.
* @param value the byte array to be wrapped.
*/
public void addExtension(
ASN1ObjectIdentifier oid,
boolean critical,
byte[] value)
{
if (extensions.containsKey(oid))
{
throw new IllegalArgumentException("extension " + oid + " already added");
}
extOrdering.addElement(oid);
extensions.put(oid, new Extension(oid, critical, new DEROctetString(value)));
}
/**
* Return true if there are no extension present in this generator.
*
* @return true if empty, false otherwise
*/
public boolean isEmpty()
{
return extOrdering.isEmpty();
}
/**
* Generate an Extensions object based on the current state of the generator.
*
* @return an X09Extensions object.
*/
public Extensions generate()
{
Extension[] exts = new Extension[extOrdering.size()];
for (int i = 0; i != extOrdering.size(); i++)
{
exts[i] = (Extension)extensions.get(extOrdering.elementAt(i));
}
return new Extensions(exts);
}
}