001/**
002 * Copyright 2014 Florent Daigniere
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package net.jsign.timestamp;
018
019import java.io.IOException;
020import java.net.HttpURLConnection;
021
022import net.jsign.DigestAlgorithm;
023import net.jsign.asn1.authenticode.AuthenticodeObjectIdentifiers;
024
025import org.bouncycastle.asn1.ASN1InputStream;
026import org.bouncycastle.asn1.DERSet;
027import org.bouncycastle.asn1.cms.Attribute;
028import org.bouncycastle.asn1.cms.AttributeTable;
029import org.bouncycastle.asn1.tsp.TimeStampResp;
030import org.bouncycastle.cms.CMSSignedData;
031import org.bouncycastle.tsp.TimeStampRequest;
032import org.bouncycastle.tsp.TimeStampRequestGenerator;
033import org.bouncycastle.tsp.TimeStampResponse;
034
035/**
036 * RFC 3161 timestamping.
037 *
038 * @author Florent Daigniere
039 * @see <a href="https://www.ietf.org/rfc/rfc3161.txt">Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)</a>
040 * @since 1.3
041 */
042public class RFC3161Timestamper extends Timestamper {
043
044    public RFC3161Timestamper() {
045        setURL("http://timestamp.sectigo.com");
046    }
047
048    protected CMSSignedData timestamp(DigestAlgorithm algo, byte[] encryptedDigest) throws IOException, TimestampingException {
049        TimeStampRequestGenerator reqgen = new TimeStampRequestGenerator();
050        reqgen.setCertReq(true);
051        TimeStampRequest req = reqgen.generate(algo.oid, algo.getMessageDigest().digest(encryptedDigest));
052        byte[] request = req.getEncoded();
053
054        HttpURLConnection conn = (HttpURLConnection) tsaurl.openConnection();
055        conn.setConnectTimeout(10000);
056        conn.setReadTimeout(10000);
057        conn.setDoOutput(true);
058        conn.setDoInput(true);
059        conn.setUseCaches(false);
060        conn.setRequestMethod("POST");
061        conn.setRequestProperty("Content-type", "application/timestamp-query");
062        conn.setRequestProperty("Content-length", String.valueOf(request.length));
063        conn.setRequestProperty("Accept", "application/timestamp-reply");
064        conn.setRequestProperty("User-Agent", "Transport");
065        
066        conn.getOutputStream().write(request);
067        conn.getOutputStream().flush();
068
069        if (conn.getResponseCode() >= 400) {
070            throw new IOException("Unable to complete the timestamping due to HTTP error: " + conn.getResponseCode() + " - " + conn.getResponseMessage());
071        }
072
073        try {
074            TimeStampResp resp = TimeStampResp.getInstance(new ASN1InputStream(conn.getInputStream()).readObject());
075            TimeStampResponse response = new TimeStampResponse(resp);
076            response.validate(req);
077            if (response.getStatus() != 0) {
078                throw new IOException("Unable to complete the timestamping due to an invalid response (" + response.getStatusString() + ")");
079            }
080
081            return response.getTimeStampToken().toCMSSignedData();
082
083        } catch (Exception e) {
084            throw new TimestampingException("Unable to complete the timestamping", e);
085        }
086    }
087
088    @Override
089    protected AttributeTable getUnsignedAttributes(CMSSignedData token) {
090        Attribute rfc3161CounterSignature = new Attribute(AuthenticodeObjectIdentifiers.SPC_RFC3161_OBJID, new DERSet(token.toASN1Structure()));
091        return new AttributeTable(rfc3161CounterSignature);
092    }
093}