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

Question

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.

Does this answer your question? [convert:not authorized \`aaaa\` @ error/constitute.c/ReadImage/453](https://stackoverflow.com/questions/42928765/convertnot-authorized-aaaa-error-constitute-c-readimage-453) — kenorb, Jul 14 '20 at 16:11

score 63 · Accepted Answer · answered Oct 08 '18 at 11:25

63

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" />

answered Oct 08 '18 at 11:25

DTV Media

This fixed my issue. However, I need to login as super user to edit the policy.xml file which is present under /home/xxx/etc/ImageMagick-6/ – SVK Oct 19 '18 at 21:44
this fixed the issue, don't forget to restart apache. – Erik van Berkum Oct 25 '18 at 01:07
2

If you are using jupyter notebook you need to restart the server Ctrl-C and run it again – Ezequiel Alanis Apr 16 '19 at 16:25
1

Command to do this: `sed -i 's,,,g' /etc/ImageMagick-6/policy.xml` – Iván Sánchez Jun 09 '21 at 15:00

score 3 · Answer 2 · answered May 05 '20 at 12:33

Troubleshooting ImageMagick on Debian-based systems.

If encountered with a PolicyError, you may be able to fix it by changing the following line in /etc/ImageMagick-6/policy.xml from this:

<policy domain="coder" rights="none" pattern="PDF" />

to this:

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

(More details about policy.xml available here.)

Taken from the repo

score 2 · Answer 3 · answered Sep 16 '20 at 11:31

2

Editing the /etc/ImageMagick-6/policy.xml and changed the rights for the pdf line to "read|write":

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

and restarting the server in my case Jupiter Notebook runtime fixed my issue

answered Sep 16 '20 at 11:31

Kokul Jose

3 Answers3