你的问题有点宽泛......我会给你一些信息，希望它能为你指明正确的方向。
问题是您想要使用时间戳服务来使用该服务执行时间戳签名：http://timestamp.globalsign.com/scripts/timstamp.dll.
首先，这项服务是Time-Stamp Protocol (TSP) RFC3161符合要求，请查看RFC 定义在这里 https://www.ietf.org/rfc/rfc3161.txt清楚地了解它是如何工作的。
不管怎样，我认为你正在寻找一个java代码示例，所以下面我给你一个示例代码，它使用RFC3161的时间戳服务器执行时间戳签名。
该示例中的步骤基本上是：
首先创建时间戳请求，然后将请求发送到
服务并最终阅读了回复。
时间戳请求具有以下定义：
TimeStampReq ::= SEQUENCE {
version INTEGER { v1(1) },
messageImprint MessageImprint,
--a hash algorithm OID and the hash value of the data to be time-stamped
reqPolicy TSAPolicyId OPTIONAL,
nonce INTEGER OPTIONAL,
certReq BOOLEAN DEFAULT FALSE,
extensions [0] IMPLICIT Extensions OPTIONAL }
正如你所看到的，只有messageImprint这是必需的，其余的是
可选取决于您的 tsp 服务为您提供的选项。
Second step is to send this timestamp request using POST method an
specifying as a Content-type http-header:
application/timestamp-query.
The last part is to parse the response and get the timestamp token.
所以这是代码：
全部一起：
import java.math.BigInteger;
import java.security.MessageDigest;
import java.util.Date;
import java.util.Random;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1StreamParser;
import org.bouncycastle.asn1.DERBoolean;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.tsp.MessageImprint;
import org.bouncycastle.asn1.tsp.TimeStampReq;
import org.bouncycastle.asn1.tsp.TimeStampResp;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.tsp.TimeStampResponse;
import org.bouncycastle.tsp.TimeStampToken;
public class TimeStampGenerationSample {
public static void main(String args[]) throws Exception{
// for this sample we will use SHA1 to perform the hashes
// however feel free to use another algorithm since sha1 is weakness
String sha1Oid = "1.3.14.3.2.26";
// data to be timestamped
byte[] data = "some sample data... or your signature...".getBytes();
// perform the hash of your data
byte[] digestData = MessageDigest.getInstance(sha1Oid, new BouncyCastleProvider()).digest(data);
// generate random data to perform your ts, it's optional depends on your ts service
Random rand = new Random(new Date().getTime());
String nonce = BigInteger.valueOf(rand.nextLong()).toString();
// require cert optional (default false... so use false)
boolean requireCert = false;
// timestampPolicy it's an oid to identify a policy, if it's required
// must be provided by your ts service... it's optional so we put null
String timestampPolicy = null;
TimeStampReq ts_req = createTimeStampRequest(digestData, nonce, requireCert, sha1Oid, timestampPolicy);
// the data to be send to the service
byte[] dataToSend = ts_req.getEncoded();
// simply send your data using POST method
// don't forget to specify http-header content-type as "application/timestamp-query"
byte[] response = // send the request as you want
// parse the response
ASN1StreamParser asn1Sp = new ASN1StreamParser(response);
TimeStampResp tspResp = new TimeStampResp((ASN1Sequence)asn1Sp.readObject());
TimeStampResponse tsr = new TimeStampResponse(tspResp);
// and get the timestamp token :)
TimeStampToken token = tsr.getTimeStampToken();
}
/**
* Create the timestamp request
* @param hashedData
* @param nonce
* @param requireCert
* @param digestAlgorithm
* @param timestampPolicy
* @return
* @throws TimeStampGenerationException
*/
public static TimeStampReq createTimeStampRequest(byte[] hashedData, String nonce, boolean requireCert, String digestAlgorithm, String timestampPolicy) throws TimeStampGenerationException {
MessageImprint imprint = new MessageImprint(new AlgorithmIdentifier(digestAlgorithm), hashedData);
TimeStampReq request = new TimeStampReq(
imprint,
timestampPolicy!=null?new DERObjectIdentifier(timestampPolicy):null,
nonce!=null?new DERInteger(nonce.getBytes()):null,
new DERBoolean(requireCert),
null
);
return request;
}
}
请注意，我使用bouncycastle API在样本中。
希望这可以帮助，
