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https://issues.apache.org/jira/browse/PDFBOX-4839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17111859#comment-17111859
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Tilman Hausherr commented on PDFBOX-4839:
-----------------------------------------
Normally being able to open the file without password means that user or owner
password is empty.
A look at the raw file shows that it is definitively encrypted, e.g. object 3
(metadata, starts with "úHù¦AøãåzÑNÝ´F Óûýdý…ß”D"). Yet PDFDebugger shows the
contents (starts with "<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>"). So
PDFBox is able to decrypt.
What I'm really wondering is why all the other viewers ask for a password...
> Iphone IOS able to open password PDF file without password
> ----------------------------------------------------------
>
> Key: PDFBOX-4839
> URL: https://issues.apache.org/jira/browse/PDFBOX-4839
> Project: PDFBox
> Issue Type: Bug
> Components: Crypto
> Affects Versions: 1.8.16
> Environment: Latest version of Apple IOS on Iphone 8s
> Reporter: Warren Nash
> Priority: Minor
> Labels: security
> Attachments: 201912Cert-10000048.pdf
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> Able to create encrypted password PDF file.
> # Able to use password PDF file on PC by entering password
> # Able to use password PDF file on Android Phone by entering password
> # Apply IOS open PDF file and then can see all contents of PDF file. No
> password is required.
>
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