generate private key from a exist file

[Carla Schaffner]

Hi

i want to generate a private key from a exist file. i tried this but it
dosen't works!

---------Code--------------

FileInputStream keyfis = new FileInputStream("keyCarlaSchaffner.pem");
//"keyCarlaSchaffner.der"
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
keyfis.close();

X509EncodedKeySpec privKeySpec = new X509EncodedKeySpec(encKey);

KeyFactory kf = KeyFactory.getInstance("RSA");
PrivateKey pk = kf.generatePrivate(privKeySpec);

---------Code end ----------

i have the private key file in pem and der encoded version, but both didn't
work.

PEM :

-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,F836EA29BA0C7925

....
...
...
-----END RSA PRIVATE KEY-----

DER: no readable

the exception is:
--------------------------------

java.security.spec.InvalidKeySpecException: Key spec not RSA.
at
com.sun.net.ssl.internal.ssl.JSA_RSAKeyFactory.getPrivateKeyData(DashoA6275)
at
com.sun.net.ssl.internal.ssl.JS_KeyFactory.engineGeneratePrivate(DashoA6275)
at java.security.KeyFactory.generatePrivate(KeyFactory.java:237)
--------------------------------

has anyone a idea?

thanks carla