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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 java.io.*;
import org.mozilla.jss.asn1.*;
import java.security.Signer;
import org.mozilla.jss.asn1.OCTET_STRING;
import org.mozilla.jss.asn1.BIT_STRING;
import org.mozilla.jss.pkix.primitive.AlgorithmIdentifier;
import org.mozilla.jss.pkix.cert.Certificate;
/**
* RFC 2560:
*
* <pre>
* BasicOCSPResponse ::= SEQUENCE {
* tbsResponseData ResponseData,
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING,
* certs [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL }
* </pre>
*
* @version $Revision$ $Date$
*/
public class BasicOCSPResponse implements Response
{
private byte mData[] = null;
private ResponseData _rd = null;
private AlgorithmIdentifier _signAlg = null;
private BIT_STRING _signature = null;
private Certificate _certs[] = null;
public BasicOCSPResponse(ResponseData rd, AlgorithmIdentifier signAlg,
BIT_STRING signature, Certificate certs[])
{
_rd = rd;
_signAlg = signAlg;
_signature = signature;
_certs = certs;
}
public BasicOCSPResponse(OCTET_STRING os)
{
this(os.toByteArray());
}
public BasicOCSPResponse(byte data[])
{
mData = data;
// extract _rd, _signAlg, _signature and _certs
try {
BasicOCSPResponse resp = (BasicOCSPResponse) getTemplate().decode(new ByteArrayInputStream(data));
_rd = resp.getResponseData();
_signAlg = resp.getSignatureAlgorithm();
_signature = resp.getSignature();
_certs = resp.getCerts();
} catch (Exception e) {
// exception in decoding byte data
}
}
private static final Tag TAG = SEQUENCE.TAG;
public Tag getTag()
{
return TAG;
}
public void encode(Tag t, OutputStream os) throws IOException
{
if (mData != null) {
os.write(mData);
} else {
SEQUENCE seq = new SEQUENCE();
seq.addElement(_rd);
seq.addElement(_signAlg);
seq.addElement(_signature);
if (_certs != null) {
SEQUENCE certsSeq = new SEQUENCE();
for (Certificate c : _certs) {
certsSeq.addElement(c);
}
EXPLICIT certsExplicit = new EXPLICIT(new Tag(0),certsSeq);
seq.addElement(certsExplicit);
}
seq.encode(t,os);
}
}
public void encode(OutputStream os) throws IOException
{
encode(TAG, os);
}
public OCTET_STRING getBytes()
{
return null;
}
public ResponseData getResponseData()
{
return _rd;
}
public AlgorithmIdentifier getSignatureAlgorithm()
{
return _signAlg;
}
public BIT_STRING getSignature()
{
return _signature;
}
public int getCertsCount()
{
return (_certs != null) ? _certs.length : 0;
}
public Certificate[] getCerts()
{
return _certs;
}
public Certificate getCertificateAt(int pos)
{
return (_certs != null) ? _certs[pos] : null;
}
private static final Template templateInstance = new Template();
public static Template getTemplate() {
return templateInstance;
}
/**
* A Template for decoding <code>ResponseBytes</code>.
*/
public static class Template implements ASN1Template
{
private SEQUENCE.Template seqt;
public Template()
{
seqt = new SEQUENCE.Template();
seqt.addElement( ResponseData.getTemplate() );
seqt.addElement( AlgorithmIdentifier.getTemplate() );
seqt.addElement( BIT_STRING.getTemplate() );
seqt.addOptionalElement( new EXPLICIT.Template(
new Tag(0), new SEQUENCE.OF_Template(
Certificate.getTemplate())) );
}
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);
ResponseData rd = (ResponseData)seq.elementAt(0);
AlgorithmIdentifier alg = (AlgorithmIdentifier)seq.elementAt(1);
BIT_STRING bs = (BIT_STRING)seq.elementAt(2);
Certificate[] certs = null;
if (seq.size() == 4) {
// optional certificates are present
EXPLICIT certSeqExplicit = (EXPLICIT) seq.elementAt(3);
SEQUENCE certSeq = (SEQUENCE) certSeqExplicit.getContent();
if (certSeq != null) {
certs = new Certificate[certSeq.size()];
for (int x = 0; x < certSeq.size(); x++) {
certs[x] = (Certificate) certSeq.elementAt(x);
}
}
}
return new BasicOCSPResponse(rd, alg, bs, certs);
}
}
}
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