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#!/bin/bash
# Password setting/generation script.
# Sets both root and u-boot password,
# or optionally just U-boot.
# What is actually written is the password
# and salt. But the password is printed
# for reference.
# ubpasswd -h will print usage.
#
# Command changes the password based on the following
# user list. The first user in this list that is found in
# /etc/shadow is changed. root is only changed if mtadm
# or admin is not found.
ADMINLIST="mtadm admin root"
MTS=/sys/devices/platform/mts-io
if (( $(id -u) != 0 )) ; then
echo "Must have root privilege to procede."
exit 1
fi
if ! [[ -x /sbin/mts-hashpwd ]] ; then
echo Need /sbin/mts-hashpwd to proceed.
exit 1
fi
usage() {
echo "ubpasswd [-c] [-m] [-n] [-r] [-u] [-d] [-s salt] [password]"
echo " -c clear the U-Boot password"
echo " -d debug"
echo " -f returns true if U-Boot password"
echo " feature is available."
echo " -m means use the mac to generate the password (obsolete)."
echo " -n dryrun for setting password"
echo " -r returns true if U-Boot password"
echo " is currently required"
echo " -s salt is user supplied salt"
echo " -u means u-boot only (not UNIX password)"
echo " password is a user supplied password"
echo "A salt not supplied is generated."
echo "If a password is not supplied, it is generated"
echo "If generating a password, and -m is not supplied,"
echo "the UUID is used for generating the password"
exit 1
}
((ubonly=0))
((usemac=0))
((hassalt=0))
((debug=0))
((upwd=0))
((dryrun=0))
while getopts ":cdfmnrs:u" opt; do
case $opt in
c)
u-boot setenv mtsp
u-boot setenv mtss
exit 0
;;
f)
if ! /bin/fgrep "mts password protected" /dev/mtdblock2 >/dev/null 2>&1; then
echo "U-Boot does not support password protection."
exit 1
else
echo "U-Boot supports password protection."
exit 0
fi
;;
m)
((usemac=1))
mac=$(cat "${MTS}/mac-eth")
if ((${#mac} == 0)) ; then
echo "${MTS}/mac-eth must have a non-zero length value"
usage
fi
;;
n)
((dryrun=1))
u)
((ubonly=1))
;;
s)
salt="$OPTARG"
((hassalt=1))
;;
r)
if /usr/bin/u-boot printenv mtsp >/dev/null 2>&1 ; then
echo "U-Boot password protection is on"
exit 0
else
echo "U-Boot password protection is off"
exit 1
fi
;;
d)
((debug=1))
;;
*)
usage
esac
done
((debug)) && echo OPTIND is $OPTIND
((sc=OPTIND-1))
shift $sc
if (($# == 1)) ; then
((debug)) && echo "User set password is \"$1\""
((upwd = 1))
pass="$1"
fi
((debug)) && echo hassalt is $hassalt, salt is \"$salt\"
((debug)) && echo ubonly is $ubonly
((debug)) && echo debug is $debug
len=8
saltlen=128
if ! /bin/fgrep "mts password protected" /dev/mtdblock2 >/dev/null 2>&1; then
echo "U-Boot does not support password protection."
exit 1
fi
if ((hassalt == 0)) ; then
salt="$(/bin/dd if=/dev/urandom count=1 bs=128 2>/dev/null | /bin/base64 | tr -d '\n' | cut -c1-${saltlen})"
fi
echo "salt: $salt"
((debug)) && echo upwd is $upwd
((debug)) && echo did length is ${#did}
if ((upwd == 0)) ; then
if ! [[ -f "${MTS}/device-id" ]] ; then
echo "${MTS}/device-id not found. Maybe mts-io driver is not loaded?"
exit 1
fi
if ! [[ -f "${MTS}/mac-eth" ]] ; then
echo "${MTS}/mac-eth not found. Maybe mts-io driver is not loaded?"
exit 1
fi
did=$(cat "${MTS}/device-id")
if ((${#did} == 0)) ; then
echo "${MTS}/device-id must have a non-zero length value"
usage
fi
if ((usemac == 0)) ; then
if ! [[ -f "${MTS}/uuid" ]] ; then
echo "${MTS}/uuid not found. Maybe mts-io driver is not loaded?"
exit 1
fi
uuid=$(cat "${MTS}/uuid")
if ((${#uuid} == 0)) ; then
echo "${MTS}/uuid must have a non-zero length value"
usage
fi
pwdsrc="-d ${did} -u ${uuid}"
else
pwdsrc="-d ${did} -m ${mac}"
fi
if ((debug)) ; then
echo Try this:
echo "/sbin/mts-hashpwd ${pwdsrc} ${salt}"
fi
result=$(/sbin/mts-hashpwd ${pwdsrc} ${salt})
else
result=$(/sbin/mts-hashpwd -p "${pass}" ${salt})
fi
if ! [[ $result =~ ^pass=([^[:space:]]+)[[:space:]]+password_hash=([^[:space:]]+) ]] ; then
echo "/sbin/mts-hashpwd failed: ${result}"
exit 1
fi
if ((debug)) ; then
echo result is:
echo "$result"
fi
pass="${BASH_REMATCH[1]}"
password_hash="${BASH_REMATCH[2]}"
echo "uboot password hash: \"$password_hash\""
if ((ubonly == 0)) ; then
rstring="^"${ADMINLIST// /:|^}":"
list=" "$(egrep "${rstring}" /etc/shadow | sed 's/:.*//')" "
for u in $ADMINLIST ; do
((debug)) && echo "list is: $list, u: is $u"
if [[ $list =~ [[:space:]]${u}[[:space:]] ]] ; then
USER="${u}"
((debug)) && echo Change password of $USER
break
fi
done
if ((${#USER} == 0)) ; then
echo "No administrator user found"
echo "Cannot change the administrator password"
echo "Suggest using the \"-u\" option"
exit 1
fi
echo "setting ${USER} password to ${pass}"
if ((dryrun == 0)) ; then
echo -e "${pass}\n${pass}" | /usr/bin/passwd "${USER}" >/dev/null 2>&1
fi
fi
echo "u-boot password is ${pass}"
if ((dryrun == 0)) ; then
/usr/bin/u-boot setenv mtss "$salt"
/usr/bin/u-boot setenv mtsp "$password_hash"
fi
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