/**
* Issues a ISO VERIFY on the remote terminal.
*
* @param p2 P2 parameter in the VERIFY APDU
* @param text to be displayed to the user
* @return true if VERIFY returned 0x9000, false otherwise
* @throws IOException when communication fails
*/
public boolean verifyPIN(int p2, String text) throws IOException, UserCancelExcption {
Map<String, Object> m = JSONProtocol.cmd("verify");
m.put("p2", p2);
m.put("text", text);
pipe.send(m);
return JSONProtocol.check(m, pipe.recv());
}
/**
* Shows a message on the screen
*
* @param text message to be shown
* @throws IOException when communication fails
*/
public void statusMessage(String text) throws IOException {
Map<String, Object> m = JSONProtocol.cmd("message");
m.put("text", text);
pipe.send(m);
if (!JSONProtocol.check(m, pipe.recv())) {
throw new IOException("Could not display status");
}
}
/**
* 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());
}
/**
* Asks for input from the user.
*
* @param message text to display to the user
* @return null or input
* @throws IOException when communication fails
*/
public String input(String message) throws IOException, UserCancelExcption {
Map<String, Object> m = JSONProtocol.cmd("input");
m.put("text", message);
pipe.send(m);
Map<String, Object> r = pipe.recv();
if (!JSONProtocol.check(m, r) || !r.containsKey("value")) {
throw new IOException("No value");
}
return (String) r.get("value");
}
/**
* 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");
}
}
public int select(String message, Map<Integer, String> choices)
throws IOException, UserCancelExcption {
Map<String, Object> m = JSONProtocol.cmd("select");
for (Map.Entry<Integer, String> e : choices.entrySet()) {
m.put(e.getKey().toString(), e.getValue());
}
m.put("text", message);
pipe.send(m);
Map<String, Object> r = pipe.recv();
if (!JSONProtocol.check(m, r) || !r.containsKey("value")) {
throw new IOException("No value");
}
try {
return Integer.valueOf((String) r.get("value"));
} catch (NumberFormatException e) {
throw new IOException("Choice was not numeric", e);
}
}