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 43local function setup_screen() 44 screen.clear() 45 screen.defcursor() 46 screen_setup = true 47end 48 49-- Module exports 50function password.read(prompt_length) 51 local str = "" 52 local twiddle_pos = 1 53 54 local function draw_twiddle() 55 printc(twiddle_chars[twiddle_pos]) 56 -- Reset cursor to just after the password prompt 57 screen.setcursor(prompt_length + 2, screen.default_y) 58 twiddle_pos = (twiddle_pos % #twiddle_chars) + 1 59 end 60 61 -- Space between the prompt and any on-screen feedback 62 printc(" ") 63 while true do 64 local ch = io.getchar() 65 if ch == core.KEY_ENTER then 66 break 67 end 68 if ch == core.KEY_BACKSPACE or ch == core.KEY_DELETE then 69 if #str > 0 then 70 if show_password_mask then 71 printc("\008 \008") 72 else 73 draw_twiddle() 74 end 75 str = str:sub(1, #str - 1) 76 end 77 else 78 if show_password_mask then 79 printc("*") 80 else 81 draw_twiddle() 82 end 83 str = str .. string.char(ch) 84 end 85 end 86 return str 87end 88 89function password.check() 90 -- pwd is optionally supplied if we want to check it 91 local function doPrompt(prompt, pwd) 92 local attempts = 1 93 94 local function clear_incorrect_text_prompt() 95 printc("\r" .. string.rep(" ", #INCORRECT_PASSWORD)) 96 end 97 98 if not screen_setup then 99 setup_screen() 100 end 101 102 while true do 103 if attempts > 1 then 104 clear_incorrect_text_prompt() 105 end 106 screen.defcursor() 107 printc(prompt) 108 local read_pwd = password.read(#prompt) 109 if pwd == nil or pwd == read_pwd then 110 -- Clear the prompt + twiddle 111 printc(string.rep(" ", #prompt + 5)) 112 return read_pwd 113 end 114 printc("\n" .. INCORRECT_PASSWORD) 115 attempts = attempts + 1 116 loader.delay(3*1000*1000) 117 end 118 end 119 local function compare(prompt, pwd) 120 if pwd == nil then 121 return 122 end 123 doPrompt(prompt, pwd) 124 end 125 126 local boot_pwd = loader.getenv("bootlock_password") 127 compare("Bootlock password:", boot_pwd) 128 129 local geli_prompt = loader.getenv("geom_eli_passphrase_prompt") 130 if geli_prompt ~= nil and geli_prompt:lower() == "yes" then 131 local passphrase = doPrompt("GELI Passphrase:") 132 loader.setenv("kern.geom.eli.passphrase", passphrase) 133 end 134 135 local pwd = loader.getenv("password") 136 if pwd ~= nil then 137 core.autoboot() 138 -- The autoboot sequence was interrupted, so we'll need to 139 -- prompt for a password. Put the screen back into a known 140 -- good state, otherwise we're drawing back a couple lines 141 -- in the middle of other text. 142 setup_screen() 143 end 144 compare("Loader password:", pwd) 145end 146 147return password 148