Using keystore with javax.crypto for file encryption/decryption

Question

I was advised to look here: http://exampledepot.com/egs/javax.crypto/DesFile.html for the source code of encryption/decryption using import javax.crypto. I have generated my key via keytool and now I don't know how to pass my generated keys into that application for encryption and decryption.

My situation is, that I have a XML file stored online (it stores configuration details) and before I parse it with a XML parser I have to decrypt it. First of all I should of course encrypt it, before it goes online.

Question is: How to pass my generated keys into code visible in link in first row?

Thanks

Robert · Accepted Answer · 2019-10-07 07:49:21Z

6

How to load a KeyStore is documented in the JavaDoc of the KeyStore class:

import java.io.FileInputStream;
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
// get user password and file input stream
char[] password = getPassword();
try (FileInputStream fis = new FileInputStream("C:/mykeystore.jks")) {
    ks.load(fis, password);
}

Once you have loaded the key store you can load the key:

Key myKey = ks.getKey("mykeyalias", password);

The key alias is the one you have specified using keytool. Using the myKey you can initialize the Cipher instance or use for example a CipherOutputStream / CipherInputStream

edited Oct 7, 2019 at 7:49

answered Apr 24, 2011 at 17:14

Robert

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