Preview shows squashed image in PDF's signed with PAdES signatures

Originator:mkrens
Number:rdar://37869269 Date Originated:February 25 2018, 7:11 PM
Status:Open Resolved:
Product:Preview Product Version:Preview Version 10.0 (944.4)
Classification: Reproducible:Yes
 
Summary:
Preview shows incorrect image width and height for the visual representation of a PAdES signature.

Steps to Reproduce:
Open the attached PDF in Preview

Expected Results:
See the screenshot of Adobe Reader DC compared to Preview. Also all other readers we've tried show the image correctly.

Actual Results:
The bounding box of the signature seems to be correct (when you select the signature). However the image inside of the bounding box is squashed. See screenshots.

Version/Build:
Preview Version 10.0 (944.4) but also happens in older versions.

Configuration:
Both settings of 'Define 100% scale as:' give the same results.

simple_pdf.pdf is the original unsigned file for reference. simple_pdf.pdf_python_appended_after_signature_1.pdf is the file that shows the wrong image.
signature_stamp.png is the image that is used in the visual representation of the signature.

Comments


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