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https://issues.apache.org/jira/browse/PDFBOX-5062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17256474#comment-17256474
 ] 

Tilman Hausherr commented on PDFBOX-5062:
-----------------------------------------

Your PDF is corrupted or malformed.

The log output shows a warning before the exception:
{noformat}
 Warning  [COSParser] The end of the stream doesn't point to the correct 
offset, using workaround to read the stream, stream start position: 125739, 
length: 7088, expected end position: 132827
 Error  [SecurityHandler] IOException thrown when decrypting object 2 0 obj
{noformat}
The second line is new, it's just for clarification of the exception you 
already know. However it allows to tell that it happens in the _same_ stream 
that has the bad length. You can use an editor like NOTEPAD++ to see what's at 
these offsets.

> IllegalBlockSizeException when loading the file
> -----------------------------------------------
>
>                 Key: PDFBOX-5062
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5062
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Crypto, PDModel
>    Affects Versions: 2.0.22
>            Reporter: Zubair Uddin Farooqui
>            Priority: Major
>         Attachments: Medical services-1 (dup-keywords) (1).pdf
>
>
> Getting _IllegalBlockSizeException_ when loading the fileĀ 
> *Code:*
> {code:java}
> PDDocument pdDoc = PDDocument.load(file);{code}
> *Exception:*
> {code:java}
> java.io.IOException: javax.crypto.IllegalBlockSizeException: Input length 
> must be multiple of 16 when decrypting with padded cipherjava.io.IOException: 
> javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 
> when decrypting with padded cipher at 
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptDataAESother(SecurityHandler.java:315)
>  at 
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:201)
>  at 
> org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptStream(SecurityHandler.java:510)
>  at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:929) 
> at 
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:886)
>  at 
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:806)
>  at 
> org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:766) at 
> org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:187) at 
> org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:226) at 
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1099) at 
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1082) at 
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1041) at 
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:989)
> {code}



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