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https://issues.apache.org/jira/browse/PDFBOX-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14548340#comment-14548340
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Andreas Lehmkühler commented on PDFBOX-2801:
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I'm won't apply that patch without having a look at an affected pdf. Maybe a
crypt filter is used which can be configured to or not to encrypt streams
and/or strings.
> SecurityHandler does not tolerate plain-text COSString
> ------------------------------------------------------
>
> Key: PDFBOX-2801
> URL: https://issues.apache.org/jira/browse/PDFBOX-2801
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Michele Balistreri
> Attachments: SecurityHandler-tolerant-decrypt.diff
>
>
> SecurityHandler does not handle the possibility, that a COSString is already
> plain text if the document is encrypted. This patch makes it tolerant when
> decrypting COSString, so that if it fails it just logs that and keeps the
> original content. The code works with all files I have.
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