Get the value of the RFC 3161 time stamp. You must call verifyTimeStampCertificateChain() and getTimeStampCertificateRevocationState() to find out whether the time stamp can be trusted. If either of these functions report a problem, the time stamp should not be displayed. A signature has either an RFC 3161 time stamp (returned by this function) or a time stamp stored as string parameter (returned by getSignatureString().

public string getTimeStamp()