1-- 2-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3-- 4-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org> 5-- Copyright (C) 2018 Kyle Evans <kevans@FreeBSD.org> 6-- All rights reserved. 7-- 8-- Redistribution and use in source and binary forms, with or without 9-- modification, are permitted provided that the following conditions 10-- are met: 11-- 1. Redistributions of source code must retain the above copyright 12-- notice, this list of conditions and the following disclaimer. 13-- 2. Redistributions in binary form must reproduce the above copyright 14-- notice, this list of conditions and the following disclaimer in the 15-- documentation and/or other materials provided with the distribution. 16-- 17-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27-- SUCH DAMAGE. 28-- 29-- $FreeBSD$ 30-- 31 32local core = require("core") 33local screen = require("screen") 34 35local password = {} 36 37local INCORRECT_PASSWORD = "loader: incorrect password" 38-- Asterisks as a password mask 39local show_password_mask = false 40local twiddle_chars = {"/", "-", "\\", "|"} 41local screen_setup = false 42 43-- Module exports 44function password.read(prompt_length) 45 local str = "" 46 local twiddle_pos = 1 47 48 local function draw_twiddle() 49 printc(twiddle_chars[twiddle_pos]) 50 -- Reset cursor to just after the password prompt 51 screen.setcursor(prompt_length + 2, screen.default_y) 52 twiddle_pos = (twiddle_pos % #twiddle_chars) + 1 53 end 54 55 -- Space between the prompt and any on-screen feedback 56 printc(" ") 57 while true do 58 local ch = io.getchar() 59 if ch == core.KEY_ENTER then 60 break 61 end 62 if ch == core.KEY_BACKSPACE or ch == core.KEY_DELETE then 63 if #str > 0 then 64 if show_password_mask then 65 printc("\008 \008") 66 else 67 draw_twiddle() 68 end 69 str = str:sub(1, #str - 1) 70 end 71 else 72 if show_password_mask then 73 printc("*") 74 else 75 draw_twiddle() 76 end 77 str = str .. string.char(ch) 78 end 79 end 80 return str 81end 82 83function password.check() 84 -- pwd is optionally supplied if we want to check it 85 local function doPrompt(prompt, pwd) 86 local attempts = 1 87 88 local function clear_incorrect_text_prompt() 89 printc("\r" .. string.rep(" ", #INCORRECT_PASSWORD)) 90 end 91 92 if not screen_setup then 93 screen.clear() 94 screen.defcursor() 95 screen_setup = true 96 end 97 98 while true do 99 if attempts > 1 then 100 clear_incorrect_text_prompt() 101 end 102 screen.defcursor() 103 printc(prompt) 104 local read_pwd = password.read(#prompt) 105 if pwd == nil or pwd == read_pwd then 106 -- Clear the prompt + twiddle 107 printc(string.rep(" ", #prompt + 5)) 108 return read_pwd 109 end 110 printc("\n" .. INCORRECT_PASSWORD) 111 attempts = attempts + 1 112 loader.delay(3*1000*1000) 113 end 114 end 115 local function compare(prompt, pwd) 116 if pwd == nil then 117 return 118 end 119 doPrompt(prompt, pwd) 120 end 121 122 local boot_pwd = loader.getenv("bootlock_password") 123 compare("Bootlock password:", boot_pwd) 124 125 local geli_prompt = loader.getenv("geom_eli_passphrase_prompt") 126 if geli_prompt ~= nil and geli_prompt:lower() == "yes" then 127 local passphrase = doPrompt("GELI Passphrase:") 128 loader.setenv("kern.geom.eli.passphrase", passphrase) 129 end 130 131 local pwd = loader.getenv("password") 132 if pwd ~= nil then 133 core.autoboot() 134 end 135 compare("Loader password:", pwd) 136end 137 138return password 139