I want to create a captcha pic by use convert
from ImageMagick.
And I follow this, but there are some problem .
Input In my linux shell:
convert -background white -fill black -font FreeSerif-Bold -pointsize 36 label:'adfgh' ./test.png
The Error is:
convert:not authorized
adfgh
@ error/constitute.c/ReadImage/453. convert:missing an image filename./test.png
@ error/convert.c/ConvertImageCommand/3015
My ImageMagick: Version:6.7.2-7 , I install it with yum install ImageMagick
.
I'm clueless. Any advice please?
Note: the solution in this and other answers involves disabling safety measures that are there to fix arbitrary code execution vulnerabilities. See for instance this ghostscript-related and this ubuntu-related announcement. Only go forward with these solutions if the input to
convert
comes from a trusted source.
I use ImageMagick in php (v.7.1) to slice PDF file to images.
First I got errors like:
Exception type: ImagickException
Exception message: not authorized ..... @ error/constitute.c/ReadImage/412
After some changes in /etc/ImageMagick-6/policy.xml
I start getting erroes like:
Exception type: ImagickException
Exception message: unable to create temporary file ..... Permission denied @ error/pdf.c/ReadPDFImage/465
My fix:
In file /etc/ImageMagick-6/policy.xml
(or /etc/ImageMagick/policy.xml
)
comment line
<!-- <policy domain="coder" rights="none" pattern="MVG" /> -->
change line
<policy domain="coder" rights="none" pattern="PDF" />
to
<policy domain="coder" rights="read|write" pattern="PDF" />
add line
<policy domain="coder" rights="read|write" pattern="LABEL" />
Then restart your web server (nginx, apache).