/**
* @param in input stream to be used (e.g. System.in)
* @param prompt The prompt to display to the user.
* @return The password as entered by the user.
*/
public static final char[] getPassword(InputStream in, String prompt) throws IOException {
MaskingThread maskingthread = new MaskingThread(prompt);
Thread thread = new Thread(maskingthread);
thread.start();
char[] lineBuffer;
char[] buf;
int i;
buf = lineBuffer = new char[128];
int room = buf.length;
int offset = 0;
int c;
loop:
while (true) {
c = in.read();
switch (c) {
case -1:
case '\n':
break loop;
case '\r':
int c2 = in.read();
if ((c2 != '\n') && (c2 != -1)) {
if (!(in instanceof PushbackInputStream)) {
in = new PushbackInputStream(in);
}
((PushbackInputStream) in).unread(c2);
} else {
break loop;
}
default:
if (--room < 0) {
buf = new char[offset + 128];
room = buf.length - offset - 1;
System.arraycopy(lineBuffer, 0, buf, 0, offset);
Arrays.fill(lineBuffer, ' ');
lineBuffer = buf;
}
buf[offset++] = (char) c;
break;
}
}
maskingthread.stopMasking();
System.out.print("\010");
// Code to clear doskey on win nt/2000 - Alt+F7
String os = System.getProperty("os.name");
if (os != null && os.toLowerCase().startsWith("windows")) {
try {
java.awt.Robot robot = new java.awt.Robot();
robot.keyPress(java.awt.event.KeyEvent.VK_ALT);
robot.keyPress(java.awt.event.KeyEvent.VK_F7);
robot.keyRelease(java.awt.event.KeyEvent.VK_F7);
robot.keyRelease(java.awt.event.KeyEvent.VK_ALT);
} catch (Exception ignore) {
logger.warning("Could not clears command history: " + ignore);
}
}
if (offset == 0) {
return null;
}
char[] ret = new char[offset];
System.arraycopy(buf, 0, ret, 0, offset);
Arrays.fill(buf, ' ');
return ret;
}