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How to Re-sign Expired .jar Files (Jacob, Icons, ...) and Extend the Self Signing Certificate (Doc ID 760815.1)

Last updated on AUGUST 20, 2023

Applies to:

Oracle Forms - Version and later
Oracle Forms for OCI - Version and later
Information in this document applies to any platform.


Important Note!  There are changes related to Jar File signing beginning in the April 2013 CPU patch which may affect your Forms application. The information in this note was written before those changes.  Please carefully read <note 1542463.1> and the links to the Java Security related information in that note.


Any .jar file that is not Oracle supplied jar file, requires signing with a trusted certificate from a Certificate Authority or a  self signed certificate to function properly: for example, the jacob.jar file required by webutil. When configuring webutil, the jacob.jar file may be signed with the "sign_webutil.bat" or "" courtesy script provided by Oracle.   This certificate normally expires after 1 year from the date of signing.

The example given describes how to resign jacob.jar, but can be used for any custom .jar file used by an application.


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