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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2015/04/29 21:30:08 UTC
[jira] [Issue Comment Deleted] (PDFBOX-2781) Opening pdf document
after encrypting it with PDFBox throws IllegalBlockSizeException
[ https://issues.apache.org/jira/browse/PDFBOX-2781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tilman Hausherr updated PDFBOX-2781:
------------------------------------
Comment: was deleted
(was: You have encovered two bugs, which have popped up because you re-encrypted a file that was already encrypted, and in a different strength. I'll work on a fix for this.)
> Opening pdf document after encrypting it with PDFBox throws IllegalBlockSizeException
> -------------------------------------------------------------------------------------
>
> Key: PDFBOX-2781
> URL: https://issues.apache.org/jira/browse/PDFBOX-2781
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Writing
> Affects Versions: 1.8.9, 1.8.10, 2.0.0
> Environment: jdk 1.7.0_55, bouncy castle provider 1.52
> Reporter: Samuli Saarinen
> Assignee: Tilman Hausherr
> Fix For: 1.8.10, 2.0.0
>
> Attachments: testform_protected.pdf
>
>
> I'm trying to encrypt pdf document as per [1] like this:
> {code:java}
> PDDocument doc = PDDocument.loadNonSeq(getClass().getResourceAsStream("/testform_protected.pdf"), null);
> int keyLength = 128; // 40 or 128; 256 will be available in version 2.0
> AccessPermission ap = doc.getCurrentAccessPermission();
> StandardProtectionPolicy spp = new StandardProtectionPolicy("12345", "", ap);
> spp.setEncryptionKeyLength(keyLength);
> spp.setPermissions(ap);
> doc.protect(spp);
> File outFile = new File("./target/testform_saved.pdf");
> doc.save(outFile);
> doc.close();
> PDDocument loaded = PDDocument.loadNonSeq(outFile, null);
> {code}
> It works fine but opening the encrypted document with PDFBox (last line of above code) throws:
> {noformat}
> org.apache.pdfbox.exceptions.WrappedIOException
> at org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:371)
> at org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptString(SecurityHandler.java:577)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.decryptString(NonSequentialPDFParser.java:1571)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.decryptDictionary(NonSequentialPDFParser.java:1535)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.decrypt(NonSequentialPDFParser.java:1596)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.parseObjectDynamically(NonSequentialPDFParser.java:1460)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.parseObjectDynamically(NonSequentialPDFParser.java:1343)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.initialParse(NonSequentialPDFParser.java:383)
> at org.apache.pdfbox.pdfparser.NonSequentialPDFParser.parse(NonSequentialPDFParser.java:886)
> at org.apache.pdfbox.pdmodel.PDDocument.loadNonSeq(PDDocument.java:1273)
> at org.apache.pdfbox.pdmodel.PDDocument.loadNonSeq(PDDocument.java:1256)
> at com.remion.bronto.proex.pdf.PDFBoxEncryptionTest.testEncryptDecrypt(PDFBoxEncryptionTest.java:30)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
> at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
> at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
> at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
> at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
> at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
> at org.testng.TestRunner.privateRun(TestRunner.java:767)
> at org.testng.TestRunner.run(TestRunner.java:617)
> at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
> at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
> at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
> at org.testng.SuiteRunner.run(SuiteRunner.java:240)
> at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
> at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
> at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
> at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
> at org.testng.TestNG.run(TestNG.java:1057)
> at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
> at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
> at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
> Caused by: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher
> at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:750)
> at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676)
> at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:313)
> at javax.crypto.Cipher.doFinal(Cipher.java:1970)
> at org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:351)
> ... 35 more
> {noformat}
> Opening the saved document with Acrobat works fine.
> [1] http://pdfbox.apache.org/1.8/cookbook/encryption.html
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