[
https://issues.apache.org/jira/browse/PDFBOX-5866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17872175#comment-17872175
]
Tilman Hausherr commented on PDFBOX-5866:
-----------------------------------------
I tried changing this code
{code}
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(getEncryptionKey(), "AES"));
{code}
to
{code}
cipher.init(Cipher.DECRYPT_MODE, new
SecretKeySpec(Arrays.copyOf(getEncryptionKey(), 32), "AES"));
{code}
just to see what would happen, and how this happened:
{noformat}
Error [SecurityHandler] IOException thrown when decrypting object 4 0 obj
Error [COSObject] Can't dereference COSObject{4 0 R}
java.io.IOException: javax.crypto.BadPaddingException: Given final block
not properly padded. Such issues can arise if a bad key is used during
decryption.
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptDataAESother(SecurityHandler.java:344)
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptData(SecurityHandler.java:230)
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptStream(SecurityHandler.java:545)
at
org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:562)
at
org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:479)
at
org.apache.pdfbox.pdfparser.COSParser.dereferenceCOSObject(COSParser.java:433)
at org.apache.pdfbox.cos.COSObject.getObject(COSObject.java:118)
at
org.apache.pdfbox.cos.COSDictionary.getDictionaryObject(COSDictionary.java:183)
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decryptDictionary(SecurityHandler.java:605)
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.decrypt(SecurityHandler.java:480)
at
org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:591)
at
org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:479)
at
org.apache.pdfbox.pdfparser.COSParser.dereferenceCOSObject(COSParser.java:433)
at org.apache.pdfbox.cos.COSObject.getObject(COSObject.java:118)
at org.apache.pdfbox.cos.COSArray.getObject(COSArray.java:277)
at org.apache.pdfbox.pdmodel.PDPageTree.getKids(PDPageTree.java:151)
at org.apache.pdfbox.pdmodel.PDPageTree.get(PDPageTree.java:319)
at org.apache.pdfbox.pdmodel.PDPageTree.get(PDPageTree.java:263)
at
org.apache.pdfbox.debugger.ui.DocumentEntry.getPage(DocumentEntry.java:47)
at
org.apache.pdfbox.debugger.ui.PDFTreeModel.getChild(PDFTreeModel.java:142)
at
java.desktop/javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1463)
at
java.desktop/javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1272)
at
java.desktop/javax.swing.tree.VariableHeightLayoutCache.rebuild(VariableHeightLayoutCache.java:728)
at
java.desktop/javax.swing.tree.VariableHeightLayoutCache.setModel(VariableHeightLayoutCache.java:111)
at
java.desktop/javax.swing.plaf.basic.BasicTreeUI.setModel(BasicTreeUI.java:495)
at
java.desktop/javax.swing.plaf.basic.BasicTreeUI$Handler.propertyChange(BasicTreeUI.java:3820)
at
java.desktop/java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:341)
at
java.desktop/java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
at
java.desktop/java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:266)
at
java.desktop/java.awt.Component.firePropertyChange(Component.java:8731)
at java.desktop/javax.swing.JTree.setModel(JTree.java:893)
at
org.apache.pdfbox.debugger.PDFDebugger.initTree(PDFDebugger.java:1520)
at
org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1443)
at
org.apache.pdfbox.debugger.PDFDebugger.readPDFFile(PDFDebugger.java:1406)
at
org.apache.pdfbox.debugger.PDFDebugger$5.actionPerformed(PDFDebugger.java:1608)
at
java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at
java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at
java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at
java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at
java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:369)
at
java.desktop/javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1020)
at
java.desktop/javax.swing.plaf.basic.BasicMenuItemUI$Handler.menuDragMouseReleased(BasicMenuItemUI.java:1132)
at
java.desktop/javax.swing.JMenuItem.fireMenuDragMouseReleased(JMenuItem.java:575)
at
java.desktop/javax.swing.JMenuItem.processMenuDragMouseEvent(JMenuItem.java:472)
at
java.desktop/javax.swing.JMenuItem.processMouseEvent(JMenuItem.java:417)
at
java.desktop/javax.swing.MenuSelectionManager.processMouseEvent(MenuSelectionManager.java:342)
at
java.desktop/javax.swing.plaf.basic.BasicPopupMenuUI$MouseGrabber.eventDispatched(BasicPopupMenuUI.java:903)
at
java.desktop/java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Toolkit.java:2194)
at
java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2086)
at
java.desktop/java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:2042)
at
java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4917)
at
java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4843)
at
java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
at
java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
at
java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
at
java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4843)
at
java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at
java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: javax.crypto.BadPaddingException: Given final block not properly
padded. Such issues can arise if a bad key is used during decryption.
at
java.base/com.sun.crypto.provider.CipherCore.unpad(CipherCore.java:975)
at
java.base/com.sun.crypto.provider.CipherCore.fillOutputBuffer(CipherCore.java:1056)
at
java.base/com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:853)
at
java.base/com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:446)
at java.base/javax.crypto.Cipher.doFinal(Cipher.java:2083)
at
org.apache.pdfbox.pdmodel.encryption.SecurityHandler.encryptDataAESother(SecurityHandler.java:340)
... 75 more
{noformat}
> Unable to load password protected pdf
> --------------------------------------
>
> Key: PDFBOX-5866
> URL: https://issues.apache.org/jira/browse/PDFBOX-5866
> Project: PDFBox
> Issue Type: Bug
> Reporter: Charles D
> Priority: Major
> Attachments: pdfbox_invalid_pwd.pdf
>
>
> PDFBox is unable to load password protected pdf. Error is "Invalid AES key
> length: 48 bytes."
> Adobe and qpdf are able to successfully open it , but many other applications
> I've tried are unable to do so.
> The pdf is created by a third party scanner so unfortunately we have no
> insight/control over its creation.
> [^pdfbox_invalid_pwd.pdf] . Please let me know the best way to provide the
> password.
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