Wand Policy Error: error/constitute.c/ReadImage/412

python-3.x wand

Prakash Kumar · Oct 8, 2018 · Viewed 12.4k times · Source

I am facing the issue while converting pdf to image using Wand:

E           wand.exceptions.PolicyError: not authorized `/opt/sample.pdf' @ error/constitute.c/ReadImage/412

I have already visited the previous stack overflow question here: convert:not authorized `aaaa` @ error/constitute.c/ReadImage/453

Here is my code

def build_image(self, pdf_path, img_path):
    with wand.image.Image(filename=pdf_path) as img:
        img.save(filename=img_path)

My code was working from last 6 months. Now, why am I getting this error?

Please help.

Answer

This is probably due to an security fix of the underlaying package (see https://bugs.launchpad.net/ubuntu/+source/imagemagick/+bug/1796563)

I fixed it for me by editing the /etc/ImageMagick-6/policy.xml and changed the rights for the pdf line to "read":

<policy domain="coder" rights="read" pattern="PDF" />