9d93dba489
Prior to r222417, setting `password' in loader.conf(5) did not prevent boot but instead only prevented changes to boot options by prompting for password if autoboot failed or the user interrupted the countdown sequence. After r222417 the same machine with `password' set in loader.conf(5) would no longer boot without _always_ entering the password. This patch restores the old (8.x and older) functionality for password in loader.conf(5) while adding a new bootlock_password feature to replace the edge-case should anybody desire the regressed functionality (HINT: great for PXE servers and/or private distributions). loader.conf(5) was updated to be more clear with-respect to password setting (previous text was misleading). Documentation (loader.conf(5) and check-password.4th(8)) has been updated to include notes on the new bootlock_password setting. Special thanks to Alex Verbod for bringing this to my attention and helping to refine the loader.conf(5) text. PR: conf/170110 Submitted by: Vitaly Zakharov <ded3axap@gmail.com> Reviewed by: Alexander Verbod <alexander.verbod@gmail.com>
140 lines
3.9 KiB
Groff
140 lines
3.9 KiB
Groff
.\" Copyright (c) 2011-2012 Devin Teske
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 10, 2012
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.Dt CHECK-PASSWORD.4TH 8
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.Os
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.Sh NAME
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.Nm check-password.4th
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.Nd FreeBSD password-checking boot module
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.Sh DESCRIPTION
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The file that goes by the name of
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.Nm
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is a set of commands designed to either prevent booting or prevent modification
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of boot options without an appropriately configured password.
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The commands of
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.Nm
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by themselves are not enough for most uses.
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Please refer to the
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examples below for the most common situations, and to
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.Xr loader 8
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for additional commands.
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.Pp
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Before using any of the commands provided in
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.Nm ,
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it must be included
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through the command:
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.Pp
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.Dl include check-password.4th
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.Pp
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This line is present in
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.Pa /boot/loader.4th
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file, so it is not needed (and should not be re-issued) in a normal setup.
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.Pp
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The commands provided by it are:
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.Pp
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.Bl -tag -width disable-module_module -compact -offset indent
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.It Ic check-password
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Dual-purpose function that can either protect the interactive boot menu or
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prevent boot without password (separately).
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.Pp
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First checks
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.Va bootlock_password
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and if-set, the user cannot continue until the correct password is entered.
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.Pp
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Next checks
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.Va password
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and if-set, tries to
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.Ic autoboot
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and only prompts for password on failure or user-interrupt.
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See
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.Xr loader.conf 5
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for additional information.
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.El
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.Pp
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The environment variables that effect its behavior are:
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.Bl -tag -width bootlock_password -offset indent
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.It Va bootlock_password
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Sets the bootlock password (up to 16 characters long) that is required by
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.Ic check-password
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to be entered before the system is allowed to boot.
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.It Va password
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Sets the password (up to 16 characters long) that is required by
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.Ic check-password
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before the user is allowed to visit the boot menu.
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.El
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.Sh FILES
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.Bl -tag -width /boot/check-password.4th -compact
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.It Pa /boot/loader
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The
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.Xr loader 8 .
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.It Pa /boot/check-password.4th
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.Nm
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itself.
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.It Pa /boot/loader.rc
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.Xr loader 8
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bootstrapping script.
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.El
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.Sh EXAMPLES
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Standard i386
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.Pa /boot/loader.rc :
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.Pp
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.Bd -literal -offset indent -compact
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include /boot/loader.4th
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check-password
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.Ed
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.Pp
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Set a password in
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.Xr loader.conf 5
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to prevent modification of boot options:
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.Pp
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.Bd -literal -offset indent -compact
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password="abc123"
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.Ed
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.Pp
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Set a password in
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.Xr loader.conf 5
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to prevent booting without password:
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.Pp
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.Bd -literal -offset indent -compact
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bootlock_password="boot"
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.Ed
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.Sh SEE ALSO
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.Xr loader.conf 5 ,
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.Xr loader 8 ,
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.Xr loader.4th 8
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.Sh HISTORY
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The
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.Nm
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set of commands first appeared in
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.Fx 9.0 .
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.Sh AUTHORS
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The
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.Nm
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set of commands was written by
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.An -nosplit
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.An Devin Teske Aq dteske@FreeBSD.org .
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