I think I remember seeing this before... happens when calling save with
some incomplete encryption settings. Could you please post the shortest
possible code that reproduces the error, the version you are using, and
upload the PDF you are using (if applicable) somewhere.
But if my memory is correct, the solution won't get the error away,
instead there would be an IllegalStateException with a meaningful error
message.
For an example about how to do encryption, see
TestSymmetricKeyEncryption.java, and
https://pdfbox.apache.org/1.8/cookbook/encryption.html
Tilman
Am 22.04.2015 um 00:38 schrieb Andrew Munn:
It looks like the StandardProtectionPolicy policy == null here:
private int computeRevisionNumber() {
return this.version < 2 &&
!this.policy.getPermissions().hasAnyRevision3PermissionSet()?2:(this.version
== 5?6:(this.version != 2 && this.version != 3 &&
!this.policy.getPermissions().hasAnyRevision3PermissionSet()?4:3));
}
java.lang.NullPointerException
at
org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.computeRevisionNumber(StandardSecurityHandler.java:129)
at
org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.prepareDocumentForEncryption(StandardSecurityHandler.java:332)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1254)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1215)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:958)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:930)
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