problem in saving and reading private key to/from file

Hi All,

I am trying to write RSA private key to the file .

Part of my code is

KeyFactory kf = KeyFactory.getInstance("RSA");

byte[] pkcs8EncodedKey;

pkcs8EncodedKey = ((PKCS8EncodedKeySpec)kf.getKeySpec (sk,PKCS8EncodedKeySpec.class)).getEncoded();

// writing the private key to output file

System.out.println("writing the private key to output file " + args[0]);

FileOutputStream fos = new FileOutputStream(args[0]);

byte[] b2 = new byte[1024];

int i2 = pkcs8EncodedKey.length;

System.out.println(" private key byte size " + i2);

while (i2 != -1)

{

fos.write(b2, 0, i2);

}

But after running this code this throws an exception as

Caught exception: java.security.spec.InvalidKeySpecException: Key spec does not match the key.

Please Guide.

Thanks.

Regards,

Deepali.

[917 byte] By [deepali8] at [2007-9-27 0:14:02]