| /* |
| * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.timestamp; |
| |
| 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; |
| |
| /** |
| * This class provides the timestamp token info resulting from a successful |
| * timestamp request, as defined in |
| * <a href="http://www.ietf.org/rfc/rfc3161.txt">RFC 3161</a>. |
| * |
| * The timestampTokenInfo ASN.1 type has the following definition: |
| * <pre> |
| * |
| * TSTInfo ::= SEQUENCE { |
| * version INTEGER { v1(1) }, |
| * policy TSAPolicyId, |
| * messageImprint MessageImprint, |
| * -- MUST have the same value as the similar field in |
| * -- TimeStampReq |
| * serialNumber INTEGER, |
| * -- Time-Stamping users MUST be ready to accommodate integers |
| * -- up to 160 bits. |
| * genTime GeneralizedTime, |
| * accuracy Accuracy OPTIONAL, |
| * ordering BOOLEAN DEFAULT FALSE, |
| * nonce INTEGER OPTIONAL, |
| * -- MUST be present if the similar field was present |
| * -- in TimeStampReq. In that case it MUST have the same value. |
| * tsa [0] GeneralName OPTIONAL, |
| * extensions [1] IMPLICIT Extensions OPTIONAL } |
| * |
| * Accuracy ::= SEQUENCE { |
| * seconds INTEGER OPTIONAL, |
| * millis [0] INTEGER (1..999) OPTIONAL, |
| * micros [1] INTEGER (1..999) OPTIONAL } |
| * |
| * </pre> |
| * |
| * @since 1.5 |
| * @see Timestamper |
| * @author Vincent Ryan |
| */ |
| |
| public class TimestampToken { |
| |
| private int version; |
| private ObjectIdentifier policy; |
| private BigInteger serialNumber; |
| private AlgorithmId hashAlgorithm; |
| private byte[] hashedMessage; |
| private Date genTime; |
| private BigInteger nonce; |
| |
| /** |
| * 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 TimestampToken(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; |
| } |
| |
| // should only be used internally, otherwise return a clone |
| public byte[] getHashedMessage() { |
| return hashedMessage; |
| } |
| |
| public BigInteger getNonce() { |
| return nonce; |
| } |
| |
| public String getPolicyID() { |
| return policy.toString(); |
| } |
| |
| public BigInteger getSerialNumber() { |
| return serialNumber; |
| } |
| |
| /* |
| * 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 |
| while (tstInfo.data.available() > 0) { |
| DerValue d = tstInfo.data.getDerValue(); |
| if (d.tag == DerValue.tag_Integer) { // must be the nonce |
| nonce = d.getBigInteger(); |
| break; |
| } |
| |
| // Additional fields: |
| // Parse accuracy |
| // Parse ordering |
| // Parse tsa |
| // Parse extensions |
| } |
| } |
| } |