When your workflow relies on certain properties of the processed PDF, who garanties that the PDF complies with a given specification? A “certified PDF document” gives this garantee.
A “certified PDF” is a regular PDF with additional information. It contains information about the profile which was used in the certification process and it contains a log of all changes to the PDF after it was certified. These changes can be rolled back.
PDFUnit provides this tag:
<!-- Tag to verify certification: --> <isCertified for=".." (optional) /> <!-- The allowed values are defined as constants: --> for="NOT_CERTIFIED" for="NO_CHANGES_ALLOWED" for="FORM_FILLING" for="FORM_FILLING_AND_ANNOTATIONS"
PDFUnit's constants correspond to iText's
Important hint, don't confuse “certified PDF” with the “certificate” of a signature.
First you can check that a document is certified at all:
<testcase name="isCertified"> <assertThat testDocument="certified/sampleCertifiedPDF.pdf"> <isCertified /> </assertThat> </testcase>
Next you can check the level of certification:
<testcase name="isCertifiedFor_NoChangesAllowed" errorExpected="YES" > <assertThat testDocument="signed/sampleSignedPDFDocument.pdf"> <isCertified for="NO_CHANGES_ALLOWED" /> </assertThat> </testcase>