Represents the TSTInfo strcture within a time-stamp token (RFC 3161).
/*
* XAdES4j - A Java library for generation and verification of XAdES signatures.
* Copyright (C) 2010 Luis Goncalves.
*
* XAdES4j is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or any later version.
*
* XAdES4j 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with XAdES4j. If not, see <http://www.gnu.org/licenses/>.
*/
//package xades4j.utils;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Date;
import sun.security.util.DerValue;
import sun.security.util.ObjectIdentifier;
import sun.security.x509.AlgorithmId;
/**
* Represents the TSTInfo strcture within a time-stamp token (RFC 3161). Based
* on the sun.security.timestamp.TimestampToken class. Copyright 2006 Sun
* Microsystems, Inc. All rights reserved. author: Vincent Ryan
* <p>
* Added getters for fields other than genTime.
*
* @author Lus
*/
public class TimeStampTokenInfo {
private int version;
private ObjectIdentifier policy;
private BigInteger serialNumber;
private AlgorithmId hashAlgorithm;
private byte[] hashedMessage;
private Date genTime;
/**
* Constructs an object to store a timestamp token.
*
* @param timestampTokenInfo
* a buffer containing the ASN.1 BER encoding of the TSTInfo
* element defined in RFC 3161.
*/
public TimeStampTokenInfo(byte[] timestampTokenInfo) throws IOException {
if (timestampTokenInfo == null)
throw new IOException("No timestamp token info");
parse(timestampTokenInfo);
}
/**
* Extract the date and time from the timestamp token.
*
* @return The date and time when the timestamp was generated.
*/
public Date getDate() {
return genTime;
}
public AlgorithmId getHashAlgorithm() {
return hashAlgorithm;
}
public byte[] getHashedMessage() {
return hashedMessage;
}
public ObjectIdentifier getPolicy() {
return policy;
}
public BigInteger getSerialNumber() {
return serialNumber;
}
public int getVersion() {
return version;
}
/*
* Parses the timestamp token info.
*
* @param timestampTokenInfo A buffer containing an ASN.1 BER encoded
* TSTInfo.
*
* @throws IOException The exception is thrown if a problem is encountered
* while parsing.
*/
private void parse(byte[] timestampTokenInfo) throws IOException {
DerValue tstInfo = new DerValue(timestampTokenInfo);
if (tstInfo.tag != DerValue.tag_Sequence)
throw new IOException("Bad encoding for timestamp token info");
// Parse version
version = tstInfo.data.getInteger();
// Parse policy
policy = tstInfo.data.getOID();
// Parse messageImprint
DerValue messageImprint = tstInfo.data.getDerValue();
hashAlgorithm = AlgorithmId.parse(messageImprint.data.getDerValue());
hashedMessage = messageImprint.data.getOctetString();
// Parse serialNumber
serialNumber = tstInfo.data.getBigInteger();
// Parse genTime
genTime = tstInfo.data.getGeneralizedTime();
// Parse optional elements, if present
if (tstInfo.data.available() > 0) {
// Parse accuracy
// Parse ordering
// Parse nonce
// Parse tsa
// Parse extensions
}
}
}