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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmsutil.ocsp;
import org.mozilla.jss.pkix.primitive.AlgorithmIdentifier;
import org.mozilla.jss.pkix.cert.Certificate;
import org.mozilla.jss.asn1.*;
import java.io.*;
/**
* RFC 2560:
*
* <pre>
* Signature ::= SEQUENCE {
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING,
* certs [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL }
* </pre>
*
* @version $Revision$ $Date$
*/
public class Signature implements ASN1Value
{
///////////////////////////////////////////////////////////////////////
// Members and member access
///////////////////////////////////////////////////////////////////////
private AlgorithmIdentifier signatureAlgorithm;
private BIT_STRING signature;
private SEQUENCE certs;
private SEQUENCE sequence;
public AlgorithmIdentifier getSignatureAlgorithm()
{
return signatureAlgorithm;
}
public BIT_STRING getSignature()
{
return signature;
}
public int getCertificateCount()
{
if(certs == null) {
return 0;
} else {
return certs.size();
}
}
public Certificate getCertificateAt(int index)
{
if(certs == null) {
throw new ArrayIndexOutOfBoundsException();
}
return (Certificate) certs.elementAt(index);
}
///////////////////////////////////////////////////////////////////////
// constructors
///////////////////////////////////////////////////////////////////////
private Signature() { }
public Signature(AlgorithmIdentifier signatureAlgorithm,
BIT_STRING signature, SEQUENCE certs)
{
sequence = new SEQUENCE();
this.signatureAlgorithm = signatureAlgorithm;
sequence.addElement(signatureAlgorithm);
this.signature = signature;
sequence.addElement(signature);
this.certs = certs;
sequence.addElement(certs);
}
///////////////////////////////////////////////////////////////////////
// encode / decode
///////////////////////////////////////////////////////////////////////
private static final Tag TAG = SEQUENCE.TAG;
public Tag getTag()
{
return TAG;
}
public void encode(OutputStream ostream) throws IOException
{
encode(TAG, ostream);
}
public void encode(Tag implicitTag, OutputStream ostream)
throws IOException
{
sequence.encode(implicitTag, ostream);
}
private static final Template templateInstance = new Template();
public static Template getTemplate()
{
return templateInstance;
}
/**
* A Template for decoding Request.
*/
public static class Template implements ASN1Template
{
private SEQUENCE.Template seqt;
public Template()
{
seqt = new SEQUENCE.Template();
seqt.addElement( AlgorithmIdentifier.getTemplate() );
seqt.addElement( BIT_STRING.getTemplate() );
seqt.addOptionalElement(
new EXPLICIT.Template(
new Tag(0),
new SEQUENCE.OF_Template( new Certificate.Template())
)
);
}
public boolean tagMatch(Tag tag)
{
return TAG.equals(tag);
}
public ASN1Value decode(InputStream istream)
throws InvalidBERException, IOException
{
return decode(TAG, istream);
}
public ASN1Value decode(Tag implicitTag, InputStream istream)
throws InvalidBERException, IOException
{
SEQUENCE seq = (SEQUENCE) seqt.decode(implicitTag, istream);
SEQUENCE certs=null;
if( seq.elementAt(2) != null ) {
certs = (SEQUENCE) ((EXPLICIT)seq.elementAt(2)).getContent();
}
return new Signature(
(AlgorithmIdentifier) seq.elementAt(0),
(BIT_STRING) seq.elementAt(1),
certs);
}
}
}
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