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--
-- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
--
-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
-- Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-- SUCH DAMAGE.
--
-- $FreeBSD$
--
local core = require("core")
local screen = require("screen")
local password = {}
local INCORRECT_PASSWORD = "loader: incorrect password"
-- Asterisks as a password mask
local show_password_mask = false
local twiddle_chars = {"/", "-", "\\", "|"}
local screen_setup = false
local function setup_screen()
screen.clear()
screen.defcursor()
screen_setup = true
end
-- Module exports
function password.read(prompt_length)
local str = ""
local twiddle_pos = 1
local function draw_twiddle()
printc(twiddle_chars[twiddle_pos])
-- Reset cursor to just after the password prompt
screen.setcursor(prompt_length + 2, screen.default_y)
twiddle_pos = (twiddle_pos % #twiddle_chars) + 1
end
-- Space between the prompt and any on-screen feedback
printc(" ")
while true do
local ch = io.getchar()
if ch == core.KEY_ENTER then
break
end
if ch == core.KEY_BACKSPACE or ch == core.KEY_DELETE then
if #str > 0 then
if show_password_mask then
printc("\008 \008")
else
draw_twiddle()
end
str = str:sub(1, #str - 1)
end
else
if show_password_mask then
printc("*")
else
draw_twiddle()
end
str = str .. string.char(ch)
end
end
return str
end
function password.check()
-- pwd is optionally supplied if we want to check it
local function doPrompt(prompt, pwd)
local attempts = 1
local function clear_incorrect_text_prompt()
printc("\r" .. string.rep(" ", #INCORRECT_PASSWORD))
end
if not screen_setup then
setup_screen()
end
while true do
if attempts > 1 then
clear_incorrect_text_prompt()
end
screen.defcursor()
printc(prompt)
local read_pwd = password.read(#prompt)
if pwd == nil or pwd == read_pwd then
-- Clear the prompt + twiddle
printc(string.rep(" ", #prompt + 5))
return read_pwd
end
printc("\n" .. INCORRECT_PASSWORD)
attempts = attempts + 1
loader.delay(3*1000*1000)
end
end
local function compare(prompt, pwd)
if pwd == nil then
return
end
doPrompt(prompt, pwd)
end
local boot_pwd = loader.getenv("bootlock_password")
compare("Bootlock password:", boot_pwd)
local geli_prompt = loader.getenv("geom_eli_passphrase_prompt")
if geli_prompt ~= nil and geli_prompt:lower() == "yes" then
local passphrase = doPrompt("GELI Passphrase:")
loader.setenv("kern.geom.eli.passphrase", passphrase)
end
local pwd = loader.getenv("password")
if pwd ~= nil then
core.autoboot()
-- The autoboot sequence was interrupted, so we'll need to
-- prompt for a password. Put the screen back into a known
-- good state, otherwise we're drawing back a couple lines
-- in the middle of other text.
setup_screen()
end
compare("Loader password:", pwd)
end
return password
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