1// +build windows
2
3package speakeasy
4
5import (
6	"syscall"
7)
8
9// SetConsoleMode function can be used to change value of ENABLE_ECHO_INPUT:
10// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
11const ENABLE_ECHO_INPUT = 0x0004
12
13func getPassword() (password string, err error) {
14	var oldMode uint32
15
16	err = syscall.GetConsoleMode(syscall.Stdin, &oldMode)
17	if err != nil {
18		return
19	}
20
21	var newMode uint32 = (oldMode &^ ENABLE_ECHO_INPUT)
22
23	err = setConsoleMode(syscall.Stdin, newMode)
24	defer setConsoleMode(syscall.Stdin, oldMode)
25	if err != nil {
26		return
27	}
28
29	return readline()
30}
31
32func setConsoleMode(console syscall.Handle, mode uint32) (err error) {
33	dll := syscall.MustLoadDLL("kernel32")
34	proc := dll.MustFindProc("SetConsoleMode")
35	r, _, err := proc.Call(uintptr(console), uintptr(mode))
36
37	if r == 0 {
38		return err
39	}
40	return nil
41}
42