Java. Io. Ioexception: Short Read of Der Length
I'm Trying to Create a Java Application That Can Read X509 Certificates Informations and Display Them in a Tableview. but I've a Problem When I'm Trying to...
I'm trying to create a Java application that can read x509 certificates informations and display them in a TableView.
But i've a problem when i'm trying to display those informations with the code below
@FXML
private void handleHDD() throws CertificateException, IOException{
String userDir = System.getProperty("user.home");
File folder = new File(userDir +"\\Desktop\\Certificate_Folder");
File[] certificates = folder.listFiles();
if (certificates!=null){
String columnHeader[] = {"Nom","Version","N°série","Algorithme de signature","Emetteur","Valide à partir de","Valide jusqu'au","Objet","Clé publique"};
int sizeColumns = 9;
for (File file : certificates){
if(file.isFile()){
CertificateFactory cf = CertificateFactory.getInstance("X.509");
InputStream input = new FileInputStream(file);
X509Certificate cert = (X509Certificate) cf.generateCertificate(input);
input.close();
for (int j = 0; j < sizeColumns; j++) {
data.add(new CertificateModel(file.getName().replace(".der", ""),cert.getVersion(),cert.getSerialNumber().toString(),cert.getSigAlgName(),cert.getIssuerDN().toString(),cert.getNotBefore(),cert.getNotAfter(),cert.getSubjectDN().toString(),cert.getPublicKey().toString()));
TableColumn col = new TableColumn();
col.setText(columnHeader[j]);
col.setMinWidth(200);
col.setCellValueFactory(new PropertyValueFactory<CertificateModel, String>(columnHeader[j]));
table.getColumns().addAll(col);
}
table.setItems(data);
}
}
}
}
When i try to execute it, i hav the following exception: java.security.cert.CertificateException
This is the full exception stack:
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3470)
at javafx.scene.Scene$ClickGenerator.access$8100(Scene.java:3398)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3766)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1771)
... 33 more
Caused by: java.security.cert.CertificateException: Unable to initialize, java.io.IOException: Short read of DER length
at sun.security.x509.X509CertImpl.<init>(X509CertImpl.java:198)
at sun.security.provider.X509Factory.engineGenerateCertificate(X509Factory.java:102)
at java.security.cert.CertificateFactory.generateCertificate(CertificateFactory.java:339)
at cm.camgovca.view.CertificateOverviewController.handleHDD(CertificateOverviewController.java:98)
... 43 more
Caused by: java.io.IOException: Short read of DER length
at sun.security.util.DerInputStream.getLength(DerInputStream.java:582)
at sun.security.util.DerValue.<init>(DerValue.java:252)
at sun.security.util.DerInputStream.getDerValue(DerInputStream.java:451)
at sun.security.x509.X509CertImpl.parse(X509CertImpl.java:1784)
at sun.security.x509.X509CertImpl.<init>(X509CertImpl.java:195)
... 46 more
The line 98 of CertificateOverview.java is
X509Certificate cert = (X509Certificate) cf.generateCertificate(input);
And my certificate is DER Encoded (.der)
2 Answers
If you look at the documentation of CertificateFactory#generateCertificate it says:
Throws: CertificateException - on parsing errors.
So, as suggested in the comments, most probably your certificate file is not in the expected format.
Especially the following line in the documentation may be of interest:
In the case of a certificate factory for X.509 certificates, the certificate provided in inStream must be DER-encoded and may be supplied in binary or printable (Base64) encoding. If the certificate is provided in Base64 encoding, it must be bounded at the beginning by -----BEGIN CERTIFICATE-----, and must be bounded at the end by -----END CERTIFICATE-----.
If you post an exception stack, with detailed exception messages, we probably can help more.
If you have a keystore defined, make sure that it is where you have defined and that the application can read it.
In my case the hint was a bit lower down in the stack trace ("java.security.KeyStore.load"):
Caused by: java.io.IOException: Short read of DER length
at sun.security.util.DerInputStream.getLength(DerInputStream.java:582) ~[na:1.8.0_212]
at sun.security.util.DerValue.init(DerValue.java:391) ~[na:1.8.0_212]
at sun.security.util.DerValue.<init>(DerValue.java:332) ~[na:1.8.0_212]
at sun.security.util.DerValue.<init>(DerValue.java:345) ~[na:1.8.0_212]
at sun.security.pkcs12.PKCS12KeyStore.engineLoad(PKCS12KeyStore.java:1938) ~[na:1.8.0_212]
at java.security.KeyStore.load(KeyStore.java:1445) ~[na:1.8.0_212]
at org.apache.tomcat.util.security.KeyStoreUtil.load(KeyStoreUtil.java:67) ~[tomcat-embed-core-9.0.27.jar!/:9.0.27]
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
