CREDS_MSDOS(8) FreeBSD System Manager's Manual CREDS_MSDOS(8)
NAME
creds_msdos - automatically add login credentials from MSDOS partition
SYNOPSIS
creds_msdos start
DESCRIPTION
The creds_msdos rc.d script allows automatic addition of login
credentials during boot using a special file found on the MSDOS partition
of a bootable image. This script is not distributed with the normal
system and is only included with pre-installed bootable images. The goal
is to allow remote access of the system without having to edit the
primary root file system (which may not be accessible from the host the
image is being written from), but place this information in the MSDOS
partition that most platforms can easily access.
Typically, an installable image (such as arm64.img) is written to an SD
card or similar media, and has both a native FFS partition as well as an
MSDOS partition for booting. If this script is enabled and has been
pointed at the boot partition it will inspect the file creds.txt for any
credentials to be added to the system.
These are the supported options in the credentials files:
sshkeyfile user keyfile
sshkey user keystring
useraddpwhash user pwhash
useradd user password
In all cases user is the username to be added, and the user will be added
to the "wheel" group.
The sshkeyfile method looks in the MSDOS boot partition for the specified
file and merges ssh keys from this file into user's
~/.ssh/authorized_keys file.
The sshkey method adds the keystring to the user's ~/.ssh/authorized_keys
file.
The useraddpwhash method uses pwhash as the users's password hash.
The above three methods are the preferred methods.
For the useradd method password is an unencrypted raw password that will
be hashed and added to the system. This method is not recommended as it
leaves unencrypted passwords around until such time that the script runs.
If this method is used then the creds.txt file will be shredded and
deleted using "rm -P" after the credentials are updated.
FILES
/boot/creds.txt
SEE ALSO
pwhash(1), rm(1), ssh(1), ssh_config(5), mount_msdos(8), sshd(8),
useradd(8)
HISTORY
The creds_msdos script appeared in NetBSD 9.0.
AUTHORS
Matthew R. Green <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 June 10, 2019 FreeBSD 14.1-RELEASE-p8