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https://issues.apache.org/jira/browse/PDFBOX-3188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-3188.
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Resolution: Fixed
Assignee: Tilman Hausherr
I did some more investigation, an encryption dictionary never appears in the
destination file, because the destination catalog is built only from specific
items, i.e. no encryption dictionary is copied.
> java.io.IOException: Error: source PDF is encrypted, can't append encrypted
> PDF documents
> -----------------------------------------------------------------------------------------
>
> Key: PDFBOX-3188
> URL: https://issues.apache.org/jira/browse/PDFBOX-3188
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.0
> Environment: Windows 8.1 x64, JDK 7u80 32 bits, Netbeans 8.1, PDFBox
> 2.0.0RC2 jar
> Reporter: Vincent
> Assignee: Tilman Hausherr
> Labels: merge
> Fix For: 2.0.0
>
>
> In the release notes of PDFBox 2.0.0 RC2 we can read that ([PDFBOX-1656])
> PDFMergerUtility is able to merge encrypted files. I have some files
> protected against modification with a password (users are allowed to open and
> print the file but its content is locked). I'm trying to merge those files
> into a single one but without success.
> 1. Adding source files.
> 2. Setting the destination filename.
> 3. Calling mergeDocuments().
> Result is : Exception in thread "main" java.io.IOException: Error: source PDF
> is encrypted, can't append encrypted PDF documents.
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.appendDocument(PDFMergerUtility.java:255)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:201)
> Note : PDDocument.load() works if I need to print the files.
> (Bonus Question : How could I decrypt a document before appending it to a new
> one (decrypt and openProtection are not used anymore))
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