Providing an interface for accessing necessary functions for signing a pdf document.
This represents a pdf signature build dictionary as specified in http://partners.adobe.com/public/developer/en/acrobat/Acrobat_Signature_BuildDict.pdf The signature build properties dictionary provides signature properties for the software application that was used to create the signature.
This represents the general property dictionaries from the build property dictionary.
This represents a pdf signature seed value dictionary.
This MDP dictionary is a part of the seed value dictionary and define if a author signature or a certification signature should be use.
If exist, it describe where the signature handler can request a rfc3161 timestamp and if it is a must have for the signature.
This represents a digital signature that can be attached to a document.
This contains the visual signature as a COSDocument, its preferred size and the page.
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