[Poppler-bugs] [Bug 62800] New: implement Crypt filter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62800

          Priority: medium
            Bug ID: 62800
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: implement Crypt filter
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: Thomas.Freitag at alfa.de
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: general
           Product: poppler

Created attachment 77090
  --> https://bugs.freedesktop.org/attachment.cgi?id=77090&action=edit
implement crypt filter

If I call i.e. pdfinfo -meta bug-poppler16092.pdf, I get an error message

Syntax Error (0): Unknown filter 'Crypt'

and the metadata is not printed. According to the spec the filter 'Crypt'
should just revert the decrypt filter:

(PDF 1.5) Decrypts data encrypted by a security handler, reproducing the data
as it was before encryption.

The attached patch implements it in that way.

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