KeyStoreWrapper.kt

fun createAndroidKeyStoreAsymmetricKey(alias: String): KeyPair {
    val generator = KeyPairGenerator.getInstance("RSA", "AndroidKeyStore")

    if (SystemServices.hasMarshmallow()) {
        initGeneratorWithKeyGenParameterSpec(generator, alias)
    } else {
        initGeneratorWithKeyPairGeneratorSpec(generator, alias)
    }
    
    // Generates Key with given spec and saves it to the KeyStore
    return generator.generateKeyPair()
}