Aleksej Kozlov created PDFBOX-5395:
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             Summary: Hangup in COSFilterInputStream.nextRange
                 Key: PDFBOX-5395
                 URL: https://issues.apache.org/jira/browse/PDFBOX-5395
             Project: PDFBox
          Issue Type: Bug
    Affects Versions: 2.0.25
            Reporter: Aleksej Kozlov


On some broken PDFs call _PDSignature.getSignedContent_ never returns.
After exploring stacktrace I've found cycle in _COSFilterInputStream.nextRange_.
{code:java}
            while (this.position < this.ranges[this.range][0])
            {
                long skipped = super.skip(this.ranges[this.range][0] - 
this.position);
                this.position += skipped;
            }
{code}
Javadoc for _skip_ says _"The skip method may, for a variety ofreasons, end up 
skipping over some smaller number of bytes, possibly 0."_
So, when _skip_ returns 0 this cycle became infinite.
Tried in versions 2.0.25 and 3.0.0-RC1.



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