password.lua revision 329167 
1--
2-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
3-- All rights reserved.
4--
5-- Redistribution and use in source and binary forms, with or without
6-- modification, are permitted provided that the following conditions
7-- are met:
8-- 1. Redistributions of source code must retain the above copyright
9--    notice, this list of conditions and the following disclaimer.
10-- 2. Redistributions in binary form must reproduce the above copyright
11--    notice, this list of conditions and the following disclaimer in the
12--    documentation and/or other materials provided with the distribution.
13--
14-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17-- ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24-- SUCH DAMAGE.
25--
26-- $FreeBSD: head/stand/lua/password.lua 329167 2018-02-12 15:32:00Z imp $
27--
28
29local password = {};
30
31local core = require("core");
32local screen = require("screen");
33
34function password.read()
35	local str = "";
36	local n = 0;
37
38	repeat
39		ch = io.getchar();
40		if ch == 13 then
41			break;
42		end
43
44		if ch == 8 then
45			if n > 0 then
46				n = n - 1;
47				-- loader.printc("\008 \008");
48				str = string.sub(str, 1, n);
49			end
50		else
51			-- loader.printc("*");
52			str = str .. string.char(ch);
53			n = n + 1;
54		end
55	until n == 16
56	return str;
57end
58
59function password.check()
60	screen.defcursor();
61	local function compare(prompt, pwd)
62		if (pwd == nil) then
63			return;
64		end
65		while true do
66			loader.printc(prompt);
67			if (pwd == password.read()) then
68				break;
69			end
70			print("\n\nloader: incorrect password!\n");
71			loader.delay(3*1000*1000);
72		end
73	end
74
75	local boot_pwd = loader.getenv("bootlock_password");
76	compare("Boot password: ", boot_pwd);
77
78	local pwd = loader.getenv("password");
79	if (pwd ~=nil) then
80		core.autoboot();
81	end
82	compare("Password: ", pwd);
83end
84
85return password
86