Prerequisites

A smart card with proper keys is required to create the signatures in this example. The MIDlet must also be signed, since signing byte data is not allowed in an untrusted domain.

This example currently does not come with the certificate, so the user can not run it properly on the device or SDK. For information on how to acquire a certificate, see section Certificate acquisition.

This MIDlet generates signatures using the CMSMessageSignatureService class. The verification for these MIDlet-made signatures cannot be done in this same MIDlet, since the signatures created by the CMSMessageSignatureService class are of CMS-format and the Signature-class verify() method doesn´t accept CMS-formatted signatures. Proper verification of signatures should be performed, for example, through a server.