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https://issues.apache.org/jira/browse/PDFBOX-3756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971268#comment-15971268
]
Esteban Nicolas Ruiz commented on PDFBOX-3756:
----------------------------------------------
Thanks for your answer.
I have changed the following line:
decryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
for:
decryptCipher = Cipher.getInstance("AES/CBC/NoPadding");
in encryptDataAESother
(org.apache.pdfbox.pdmodel.encryption.SecurityHandler.java) and the issue is
solved and the PDF file seems to be properly rendered (I'm aware that this
"solution" is insecure).
You may want to see the attached screenshot from PDFDebugger (I have tried to
include all the encryption-related data).
Maybe you can tell me how can I know if it is a bug in pdfbox or the pdf file
is wrong?
> javax.crypto.BadPaddingException: Given final block not properly padded
> -----------------------------------------------------------------------
>
> Key: PDFBOX-3756
> URL: https://issues.apache.org/jira/browse/PDFBOX-3756
> Project: PDFBox
> Issue Type: Bug
> Components: Crypto
> Affects Versions: 2.0.5
> Environment: java version "1.8.0_112"
> Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
> Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)
> Reporter: Esteban Nicolas Ruiz
> Labels: crypto
> Attachments: pdfdebugger.png
>
>
> I get the following stack trace when running:
> java -jar pdfbox-app-2.0.5.jar PDFDebugger somefile.pdf
> File is properly opened with other viewers, I cannot publish the pdf file due
> to privacy restrictions.
> java.io.IOException: javax.crypto.BadPaddingException: Given final block not
> properly padded
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptDataAESother(SecurityHandler.java:296)
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:153)
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptStream(SecurityHandler.java:454)
> org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:790)
>
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:747)
>
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:678)
> org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:638)
> org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:236)
> org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:271)
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:984)
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:922)
>
> org.apache.pdfbox.debugger.PDFDebugger.parseDocument(PDFDebugger.java:1288)
> org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1209)
> org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1194)
> org.apache.pdfbox.debugger.PDFDebugger.main(PDFDebugger.java:1185)
> org.apache.pdfbox.tools.PDFBox.main(PDFBox.java:76)
> Caused by: javax.crypto.BadPaddingException: Given final block not properly
> padded
> com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:989)
> com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:845)
> com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:446)
> javax.crypto.Cipher.doFinal(Cipher.java:2048)
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptDataAESother(SecurityHandler.java:276)
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:153)
>
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptStream(SecurityHandler.java:454)
> org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:790)
>
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:747)
>
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:678)
> org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:638)
> org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:236)
> org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:271)
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:984)
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:922)
>
> org.apache.pdfbox.debugger.PDFDebugger.parseDocument(PDFDebugger.java:1288)
> org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1209)
> org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1194)
> org.apache.pdfbox.debugger.PDFDebugger.main(PDFDebugger.java:1185)
> org.apache.pdfbox.tools.PDFBox.main(PDFBox.java:76)
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