/**
* Shows a dialog message to the user and returns the pressed button.
*
* @param message text to display to the user
* @return {@link Button} that was pressed by the user
* @throws IOException when communication fails
*/
public Button dialog(String message) throws IOException, UserCancelExcption {
Map<String, Object> m = JSONProtocol.cmd("dialog");
m.put("text", message);
pipe.send(m);
Map<String, Object> r = pipe.recv();
if (!JSONProtocol.check(m, r) || !r.containsKey("button")) {
throw new IOException("Unknown button pressed");
}
return Button.valueOf(((String) r.get("button")).toUpperCase());
}
/**
* Shows the response of the APDU to the user.
*
* <p>Normally this requires the verification of a PIN code beforehand.
*
* @param message text to display to the user
* @param apdu APDU to send to the terminal
* @return {@link Button} that was pressed by the user
* @throws IOException when communication fails
*/
public Button decrypt(String message, byte[] apdu) throws IOException, UserCancelExcption {
Map<String, Object> m = JSONProtocol.cmd("decrypt");
m.put("text", message);
m.put("bytes", HexUtils.bin2hex(apdu));
pipe.send(m);
Map<String, Object> r = pipe.recv();
if (JSONProtocol.check(m, r)) {
return Button.valueOf(((String) r.get("button")).toUpperCase());
} else {
throw new IOException("Unknown button pressed");
}
}
