With the toolkit classes, your application can request timestamps to a timestamping service.

Logging the user

Instantiate a user, set the connection to the Directory (if the user provides the IP address), and log in.

FileInputStream credentials = new FileInputStream (<credentials_location>);
SecureStringBuffer password = new SecureStringBuffer(new StringBuffer(<user_password>));
User user = new User();
if (<IP address> != null)
{
  JNDIDirectory dir = new JNDIDirectory (<ip>, <port>);
  user.setConnections(dir, null);
}
CredentialReader credReader = new StreamProfileReader(credentials);
user.login(credReader, password>);

Signing the message

Create an output stream to write the signed data to memory.

ByteArrayOutputStream encodedP7Data = new ByteArrayOutputStream();

Create the signed PKCS #7 data using the SIGN_ONLY operation.

PKCS7EncodeStream p7EncodeStream = new PKCS7EncodeStream(user, encodedP7Data, PKCS7EncodeStream.SIGN_ONLY);

Configuring the timestamp request

Create the timestamp validation mechanism and retrieve a certificate verifier using the getCertVerifier method.

TimeStampVerifier timeStampVerifier = new TimeStampVerifier((CertVerifier)user.getCertVerifier);

Create the HTTP connection to the timestamping service.

TimeStampTransport transport = new HttpTimeStampTransport("http://www.mycompany.com:1234/tsa");

Instantiate a timestamp client.

TimeStampClient timeStampClient = new TimeStampClient(transport, timeStampVerifier);

Optionally, specify the hash algorithm for the timestamp request.

timeStampClient.setHashAlgorithm(AlgorithmID.MessageDigestAlgs.md5;

If your application does not specify the algorithm, the default algorithm, SHA1, will be used.

Optionally, request the timestamping service to return the timestamp certificate.

timeStampClient.setRequestTSACert(Boolean.TRUE);

Requesting the timestamp

Request a timestamp for the signature.

p7EncodeStream.requestTimeStamp(timeStampClient);

Writing the timestamped message

Write the signed and timestamped data to the encode stream.

p7EncodeStream.write(TEST_DATA);
p7EncodeStream.flush();
p7EncodeStream.close();