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https://issues.apache.org/jira/browse/PDFBOX-2458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler resolved PDFBOX-2458.
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Resolution: Fixed
> Signing doesn't work anymore using BC 1.51 instead of 1.50
> ----------------------------------------------------------
>
> Key: PDFBOX-2458
> URL: https://issues.apache.org/jira/browse/PDFBOX-2458
> Project: PDFBox
> Issue Type: Bug
> Components: Signing
> Affects Versions: 1.8.7, 2.0.0
> Reporter: Andreas Lehmkühler
> Assignee: Andreas Lehmkühler
> Fix For: 1.8.8, 2.0.0
>
>
> Due to a report of David Wall on users@ signing no longer works using BC 1.51
> instead of 1.50.
> {quote}
> I'm now getting an invalid digital signature that I created on PDFs we
> generate (via wkhtmltopdf and PDFBox 1.8.7). It says "At least one signature
> is invalid" but I previously could create them with valid signatures. This
> occurred when going from BouncyCastle 1.50 to 1.51, and if I go back to 1.50,
> it works fine.
> The invalid signature complains that the "Document has been altered or
> corrupted since it was signed".
> Here's a link to an existing PDF that has an invalid signature:
> http://open.esignforms.com/pdfboxlist/MyDocumentsGOOD.pdf (using BC 1.50)
> http://open.esignforms.com/pdfboxlist/MyDocumentsBAD.pdf (using BC 1.51)
> {quote}
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