// Validate a timestamp if it is present
Timestamp timestamp = header.getTimestamp();
if (timestamp != null)
{
TimestampVerificationOperation operation =
(now == null) ? new TimestampVerificationOperation(timestampVerification) : new TimestampVerificationOperation(now);
operation.process(message, timestamp);
}
if (authenticate == null || authenticate.isUsernameAuth())
{
for (Token token : header.getTokens())