issues in Signing a jar in java : public key issue

Question

I am working on one swing application and i want to make it "web start" for that i need to sign my jar

For this, I followed following steps : 1. Create a key store file using following command

keytool -genkey -keystore myKeystore -alias myself 

keytool -selfcert -alias myself -keystore myKeystore

Enter keystore password:

keytool -list -keystore myKeystore

Enter keystore password:

Keystore type: JKS Keystore provider: SUN

Your keystore contains 1 entry

myself, Aug 7, 2013, PrivateKeyEntry, Certificate fingerprint (SHA1): 9A:CD:47:D2:9D:51:F4:5A:56:FB:5C:27:7B:E6:03:EE: 65:70:F7:7B

Private Key is genarated above successfully.

2.

jarsigner -keystore myKeystore "C:..\myApp.jar" sourabh Enter Passphrase for keystore:

jarsigner: Certificate chain not found for: sourabh. sourabh must reference a v alid KeyStore key entry containing a private key and corresponding public key ce rtificate chain.

It is showing above error.

Issue 1: From where i can get this public key?

I googled it. Information is there for public key but could not get any information about creating. How can we generate it for my application.

Issue 2 : If i am moving my application to online server (e.g. apache derver) do i need to copy keystore file also>?

Answer 1

1. You need to specify the same alias to the jarsigner tool. You used 'myself' when building the keystore: use that again.
2. Definitely not. It contains your private key. Keep it private.