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java.io.IOException: Keystore was tampered with, or password was incorrect
        at java.base/sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:813)
        at java.base/sun.security.util.KeyStoreDelegator.engineLoad(KeyStoreDelegator.java:226)
        at java.base/java.security.KeyStore.load(KeyStore.java:1503)
        at Sftpserv.getServerSocketFactory(Sftpserv.java:146)
        at Sftpserv.main(Sftpserv.java:46)
Caused by: java.security.UnrecoverableKeyException: Password verification failed
        at java.base/sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:811)
        ... 4 more
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "javax.net.ServerSocketFactory.createServerSocket(int)" because "ssf" is null
        at Sftpserv.main(Sftpserv.java:47)
make: *** [MakeFile:19: runServer] Error 1