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Okay, I'll say now that I know very little about Java. I was given the Bouncy Castle Jar and told that would contain what I needed to do this assignment. The Jar file is bcprov-jdk15on-147.jar. I'm also doing this on a Unix machine maintained by my school, so I can't go in and play with all of the Java files.
When I compile my class using Javac (specifically I use the command javac -classpath bcprov-jdk15on-147.jar encrypt.java), it compiles without error, but when I go to run the program afterward using the command java encrypt, I get this error message:
Exception in thread "main" java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
Caused by: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
My Jar file is located in my main folder with all of my other files, just in case it has to go somewhere special and that's what I didn't do.
When I do java -classpath bcprov-jdk15on-147.jar encrypt this is the error I get:
Exception in thread "main" java.lang.NoClassDefFoundError: encrypt
Caused by: java.lang.ClassNotFoundException: encrypt
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Why am I having trouble running the compiled program?
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Installation of Bouncy Castle for use in TomEE itself is done in two steps: Add the Bouncy Castle provider jar to the $JAVA_HOME/jre/lib/ext directory. Create a Bouncy Castle provider entry in the $JAVA_HOME/jre/lib/security/java. security file.
VERSION. UPDATE: new BouncyCastleProvider(). getVersion() is the solution. You could fingerprint known class files with a hash signature and detect that way.
BouncyCastle is a Java library that complements the default Java Cryptographic Extension (JCE).
Type this for running the program:
java -classpath bcprov-jdk15on-147.jar:. encrypt
That's because your program also needs to have any libraries it uses as part of the classpath at the time of running, not only at compile time.
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