See following session. Password tool ends up with java.lang.NoClassDefFoundError.
jbosssx.jar is relocated to $JBOSS_HOME/lib directory.

The same issue applies for password_tool.bat.

[pskopek@hucho bin]$ ./password_tool.sh
**********************************

• • • • JBoss Password Tool********
        **********************************
        Error while trying to load data:Encrypted password file not located
        Maybe it does not exist and need to be created.
        0: Encrypt Keystore Password 1:Specify KeyStore 2:Create Password 3: Remove a domain 4:Enquire Domain 5:Exit
        1
        Enter Keystore location including the file name
        password/password.keystore
        Enter Keystore alias
        1
        Exception in thread "main" java.lang.NoClassDefFoundError: org/jboss/security/plugins/FilePassword
        at org.jboss.security.integration.password.PasswordMaskManagement.ensureKeyStore(PasswordMaskManagement.java:297)
        at org.jboss.security.integration.password.PasswordMaskManagement.setKeyStoreDetails(PasswordMaskManagement.java:83)
        at org.jboss.security.integration.password.PasswordTool.main(PasswordTool.java:121)
        Caused by: java.lang.ClassNotFoundException: org.jboss.security.plugins.FilePassword
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
        ... 3 more
        org.jboss.security.integration.password.PasswordTool$ShutdownHook run called
        Keystore is null. Cannot store.