About-Loading-A-Digitally-Signed-Custom-Program-File

About Loading A Digitally Signed Custom Program File

    About Loading A Digitally Signed Custom Program File

    A custom program file, whether digitally signed or not, can be loaded using the same
    techniques, but there are some additional considerations you might want to consider
    when deploying a digitally signed file.

    When loading a custom program file that has been digitally signed, the AutoCAD-based
    program verifies the digital signature attached to the file. A message box is displayed,
    whether the digital signature could be verified, that allows the user to load or not
    load the program file into the drawing environment.

    The following outlines the conditions that affect the information displayed in the
    message box upon the loading of a custom program file.

    Digital signature verified and the file hasn’t been changed

    Recommendation: File should be safe to load, but you will want to verify the source of the file if
    it is being loaded the first time.

    Solution: Load and use the file as expected. Optionally, trust the publisher to avoid the message
    box in the future for all files signed by the publisher.

    Digital signature couldn’t be verified

    A digital signature can’t be verified for the following reasons:

    • File isn’t signed or was incorrectly signed
    • File is signed, but the digital certificate to validate against isn’t installed in
      the ‘Trusted Root Certification Authorities’ store

    Recommendation: Verify the source of the file and that the digital certificate used to sign the file
    has been installed.

    Solution: Install the digital certificate used to sign the file into the ‘Trusted Root Certification
    Authorities’ store. See “To Import a Digital Certificate” for information on how to
    install the digital certificate, if you or your company made the certificate.

    Digital signature is invalid as a result of the file being changed after it was signed

    Recommendation: Don’t load the file.

    Solution: Obtain a version of the file that has been verified and signed. See “About Digitally
    Signing Custom Program Files” for information on digitally signing a file.

    Learning AutoCad

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