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"Lock Document After Signing" shown signaturetype = 2?

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#20341
Posted: 06/06/2012 06:52:37
by Draycir Thailand (Standard support level)
Joined: 04/03/2012
Posts: 9

How can i differentiate the pdf that is signed with "Lock Document After Signing" option from the pdf that is certified.
previously i use SignatureType field of the SBPDF.TElPDFSignature object. when that value equal 2 i assume it is certified. when it's 0 then i assume it is signed.
is that not the correct way?
#20343
Posted: 06/06/2012 07:24:29
by Ken Ivanov (EldoS Corp.)

Thank you for getting in touch with us.

The "lock document after signing" feature is not opposite to the concept of document certification.

There are two types of PDF signatures: 1) generic document signature, 2) certification signature. Some details about the differences between them are available here. As you can see, you can lock the document when creating signatures of any of these types.

To distinguish signature from certification, please check the signature's SignatureType property. It will be set to SBPDF.Unit.stMDP (2) for certification signatures or to SBPDF.Unit.stDocument (1) for generic signatures.

To detect whether a document is locked, please check the AllowedChanges property of a TElPDFSignature object. It should be set to 0 for the locked documents.

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