Develop Reference

Java Class "BCRSAPublicKey" Intermittently Not Found

Context
Using KNIME 4.1.2, Windows 10, x64, JDK 1.8, Java Edit Snippet
I am attempting to use the Java Snippet to read a CSV file, pgp encrypt it using a public key, and save the resulting file to a temporary folder
I have been attempting to use BounceCastle Library v1.65
try {
encryptFile(
"encryptedfile.csv.pgp",
"original.csv",
"/key/pub.asc",
false,
false);
} catch(Exception e) {
out_result = "fail";
}
The challenge is, I get the following error in the console INTERMITTENTLY and I am unclear what I am incorrectly providing to the library / not including. The confounding is because it is intermittent and sometimes yields the properly encrypted file.
Caused by: java.lang.NoClassDefFoundError: org/bouncycastle/jcajce/provider/asymmetric/rsa/BCRSAPublicKey
at org.bouncycastle.jcajce.provider.asymmetric.rsa.KeyFactorySpi.engineGeneratePublic(Unknown Source)
at java.security.KeyFactory.generatePublic(KeyFactory.java:328)
at org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyConverter.implGeneratePublic(Unknown Source)
at org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyConverter.getPublicKey(Unknown Source)
at org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator.encryptSessionInfo(Unknown Source)
at org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator.generate(Unknown Source)
at org.bouncycastle.openpgp.PGPEncryptedDataGenerator.open(Unknown Source)
at org.bouncycastle.openpgp.PGPEncryptedDataGenerator.open(Unknown Source)
at JSnippet.encryptFile(JSnippet.java:144)
at JSnippet.encryptFile(JSnippet.java:107)
at JSnippet.snippet(JSnippet.java:174)
at org.knime.base.node.jsnippet.JavaSnippetCellFactory.getCells(JavaSnippetCellFactory.java:300)

Running jTSS in Eclipse

I am trying to run the Trusted Computing API JSR321 in Eclipse by following the tutorial provide at Getting Started with JSR321 in Windows 7.
After successfully enabling my TPM (manufacturer: STM & version: 1.2).
I tried to run the code given in the tutorial,
import javax.trustedcomputing.tpm.TPMContext;
public class HellowWorld {
public static void main(String[] args) {
// TODO Auto-generated method stub
try{
TPMContext context = TPMContext.getInstance();
context.connect(null);
//Do somthing cool here
context.close();
}
catch (Exception e){
e.printStackTrace();
}
}
}
I also added the external jar files as Classpaths in eclipse for the IAIK jTSS (jTSS 0.7.1a), they also mentioned that
It is necessary to set the jsr321.tpmcontextimpl property to the classname of your TPMContext implementation.
For example java -cp YourClasspath -Djsr321.tpmcontextimpl=iaik.tc.jsr321.tpm.TPMContextImpl yourjavaapplication.class
So I added the above code by right clicking on the project and going to the Run As -> Run Configuration and in the Arguments tab in the section provided for VM arguments I inserted the following command
-cp C:\Users\workspace\HelloWorld\bin -Djsr321.tpmcontextimpl=iaik.tc.jsr321.tpm.TPMContextImpl HellowWorld
But I am getting the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/trustedcomputing/tpm/TPMContext
at HellowWorld.main(HellowWorld.java:10)
Caused by: java.lang.ClassNotFoundException: javax.trustedcomputing.tpm.TPMContext
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I have already added all the mentioned dependencies in Java Build Paths inside Project Properties.
Kindly suggest a solution.
Thanks

Sending a serialized Android object using sockets throws an InvalidClassException

I'm trying to make an online drawing game. For that I'm using the Path class in Android and I need to send it to my Java server. To do that, I had tried to extend the Path class, as follows:
public class SerializedPath extends Path implements Serializable {
private static final long serialVersionUID = -5974912367682897467L;
}
To simplify things and to narrow down the problem, all I did was to send it with outputStream.writeObject(new SerializedPath) and then outputStream.flush() where outputStream is an instance of ObjectOutputStream. Over the server I simply read it using inputStream.readObject() where inputStream is an instance of ObjectInputStream. The exception I'm getting is:
java.io.InvalidClassException: com.droplay.drawingonline.path.SerializedPath; unable to create instance
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at com.droplay.drawingonline.Session.run(Session.java:71)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedSerializationConstructorAccessor1.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.io.ObjectStreamClass.newInstance(Unknown Source)
... 5 more
Caused by: java.lang.RuntimeException: Stub!
at android.graphics.Path.(Path.java:24)
... 8 more
Now, to isolate the problem, I had tried creating a new class that doesn't have any members and doesn't extend anything and it did work. The server didn't throw any exception and it worked like a charm. I made sure the packages names are the same, the names of the classes are the same, the server uses the same SDK files as my Android project and the files' code in both the Android app and the Java server are EXACTLY the same, but I keep getting this exception. The app doesn't throw any exception. It sends the object just fine. Please, what's wrong with my code? Thank you for helping! :)

Well I managed to solve it by sending the position of each click to the server, instead of a path class. But why didn't it work when I serialized it?

SOAP web service not working for EJB calls

I am trying to create a SOAP based web service, which will call stateless EJB in other project. My configuration is Server: WAS 8.5,IDE: RAD 8.5,Java 1.6, EJB 3.1, and SOAP 1.1. When I write a simple addition method it properly create Web Service, WSDL and i can access the Web Service. But When i add another method which calls EJB it wont allows me to create service and WSDL, it throws below error popup :
Errors occurred during wsgen.
error: compilation failed, errors should have been reported
warning: The apt tool and its associated API are planned to be
removed in the next major JDK release. These features have been
superseded by javac and the standardized annotation processing API,
javax.annotation.processing and javax.lang.model. Users are
recommended to migrate to the annotation processing features of
javac; see the javac man page for more information.
Note: ap round: 1
Problem encountered during annotation processing;
see stacktrace below for more information.
java.lang.NullPointerException
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalType(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalMethod(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.methodsAreLegal(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.isLegalImplementation(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.shouldProcessWebService(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceVisitor.visitClassDeclaration(Unknown Source)
at com.sun.tools.apt.mirror.declaration.ClassDeclarationImpl.accept(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceAP.buildModel(Unknown Source)
at com.ibm.jtc.jax.tools.ws.processor.modeler.annotation.WebServiceAP.process(Unknown Source)
at com.sun.mirror.apt.AnnotationProcessors$CompositeAnnotationProcessor.process(Unknown Source)
at com.sun.tools.apt.comp.Apt.main(Unknown Source)
at com.sun.tools.apt.main.AptJavaCompiler.compile(Unknown Source)
at com.sun.tools.apt.main.Main.compile(Unknown Source)
at com.sun.tools.apt.main.Main.compile(Unknown Source)
at com.sun.tools.apt.Main.processing(Unknown Source)
at com.sun.tools.apt.Main.process(Unknown Source)
at com.sun.tools.apt.Main.process(Unknown Source)
at com.ibm.jtc.jax.tools.ws.wscompile.WsgenTool.buildModel(Unknown Source)
at com.ibm.jtc.jax.tools.ws.wscompile.WsgenTool.run(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.ibm.ast.ws.jaxws.emitter.jws22.v85.command.AbstractWsGenCommand.execute(Unknown Source)
at com.ibm.ast.ws.jaxws.emitter.command.WsGenCommand.execute(Unknown Source)
....
This is my code which works fine
public class Operations {
public int addition(int x, int y){
return x+y;
}
public String Greetings(String name){
return "happy birthday"+name;
}
}
when i add
#EJB
private transient StatusEJBBeanLocal statusEJBBeanLocal;
public Product StatusFromProductId(int ProdutoID) {
Product produto = null;
produto = this.statusEJBBeanLocal.StatusFromProductId(ProdutoID);
return produto;
}
It shows error. Please help me out here with some tutorial link or tell me whats wrong with my code, how to call EJB from Web services. Thanks in advance.

ProGuard difficulties when obfuscating with libraries

While trying to use ProGuard (4.9) to obfuscate and optimise a desktop application everything works up until I use something from an external library such as JSoup.connect("http://google.com/").get();. I would get the following error:
Exception in thread "Thread-2" java.lang.ExceptionInInitializerError
at org.jsoup.b.l.<clinit>(Unknown Source)
at org.jsoup.b.f.<init>(Unknown Source)
at org.jsoup.b.e.<init>(Unknown Source)
at org.jsoup.c.bh.b(Unknown Source)
at org.jsoup.c.bh.a(Unknown Source)
at org.jsoup.c.b.a(Unknown Source)
at org.jsoup.c.D.a(Unknown Source)
at org.jsoup.a.a.a(Unknown Source)
at org.jsoup.a.i.e(Unknown Source)
at org.jsoup.a.e.a(Unknown Source)
at package.a.a(Unknown Source)
at package.a.b(Unknown Source)
at package.w.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Unknown Source)
at java.util.Properties.load0(Unknown Source)
at java.util.Properties.load(Unknown Source)
at org.jsoup.b.k.d(Unknown Source)
at org.jsoup.b.k.<clinit>(Unknown Source)
... 14 more
I have tried searching for a solution but the answer would always be for an android application. With no luck I have attempted the following:
Turn off Use mixed-class names
Added to config -keep public enum * { public static **[] values(); public static ** valueOf(java.lang.String); }
Recently, going through with this process using ProGuard 5.2, not much has changed. Here is the updated process to fixing the issue:
Go to the Obfuscation tab.
Go to the bottom for Keep additional class names and class member names
Click on Add... to the right
Go down to Extends/implements class and type in your library matching the examples below then press Ok. Repeat for every library.
For JSoup: org.jsoup.**
For Apache Commons Net: org.apache.commons.net.**
For SwingX: org.jdesktop.**
For GSON: org.google.gson.**
Go to the Information tab.
Turn off Skip non-public library class members
Turn on Ignore warnings about possibly erroneous input
Process!