How to change Password of KeyStore File in Java?

Question

I am using java KeyStore to store user secure information and locking (encrypting) the key store with password and retrieving the information with password when needed, which is working fine.

But i don't know how to change the password for the same keyStore file

i am using KeyStore.load(InputStream,Password) method to accessing the keystore with user password and keyStore.store(Keystore,password) for writing the values into keyStore.

Is there any way to change the password of keyStore file. i have checked the api documentation give here : http://docs.oracle.com/javase/7/docs/api/java/security/KeyStore.html

Have you tried rewriting your keystore to the same file, but a different password, using the `store(OutputStream, char[])` method? — Danail Alexiev, Feb 22 '16 at 17:04
it worked for me thank you @DanailAlexiev , i have posted the code in my answer. — Tushar Purohit, Feb 22 '16 at 19:13

score 5 · Accepted Answer · answered Feb 22 '16 at 19:11

Thanks @Danail Alexiev its works, loading the KeyStore with old password and the overwriting the same keyStoreStream with new password will change the keyStore password (encrypt the keystore content with new password)

here is the code for reffrence:

InputStream keyStoreStream = ontext.openFileInput ( filename );
KeyStore keyStore = KeyStore.getInstance ( KeyStore.getDefaultType ( ) );
keyStore.load ( keyStoreStream, oldPass );
FileOutputStream fileOutputStream = context.openFileOutput ( filename, Context.MODE_PRIVATE );
keystore.store ( fileOutputStream, newPassword );
fileOutputStream.close ( );

How to change Password of KeyStore File in Java?

1 Answers1