class MainActivity:AppCompatActivity(), SecurityKeyDialogCallback<OpenPgpSecurityKey> {

    private fun showSecurityKeyDialog() {
        val options = SecurityKeyDialogOptions.builder()
            //.setPinLength(4) // security keys with a fixed PIN and PUK length improve the UX
            //.setPukLength(8)
            .setShowReset(true) // show button to reset/unblock of PIN using the PUK
            .build()

        val securityKeyDialogFragment = OpenPgpSecurityKeyDialogFragment.newInstance(options)
        securityKeyDialogFragment.show(supportFragmentManager)
    }

    override fun onSecurityKeyDialogDiscovered(
        dialogInterface: SecurityKeyDialogInterface,
        securityKey: OpenPgpSecurityKey,
        pinProvider: PinProvider?
    ) {
        val loginName = "cotech"
        val loginHost = "ssh.hwsecurity.dev"
        connectToSsh(loginName, loginHost, securityKey, pinProvider)
    }

    private fun connectToSsh(
        loginName: String, loginHost: String, securityKey: OpenPgpSecurityKey, pinProvider: PinProvider
    ) = runBlocking {
        val deferred = GlobalScope.async(Dispatchers.IO) {
            val securityKeyAuthenticator = securityKey.createSshAuthenticatorFromPublicKey(pinProvider)
            // NOTE: Please consult the guide for more details on SecurityKeyJschIdentity and jschConnection()
            val securityKeyIdentity = SecurityKeyJschIdentity(loginName, securityKeyAuthenticator)
            jschConnection(loginHost, securityKeyIdentity)
        }

        try {
            deferred.await()
        } catch (e: Exception) {
            // NOTE: Please consult the guide for a full sample.
        }
    }
}