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smartcardauth/etc/smartauth/smartauthmon.sh.in

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20 KiB

#!/bin/bash
# Smart Card TDE Authentication Script (c) 2010-2011 Timothy Pearson
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Maximum number of virtual terminals on this system
MAXIMUM_VTS=49
# The [secure] temporary directory for authentication
SECURE_DIRECTORY=/tmp/smartauth
hexcvt ()
{
echo ""$1" "16" o p" | dc
}
# Create the secure directory and lock it down
rm -rf $SECURE_DIRECTORY
mkdir -p $SECURE_DIRECTORY
chown root $SECURE_DIRECTORY
chgrp root $SECURE_DIRECTORY
chmod 600 $SECURE_DIRECTORY
SECURE_DIRECTORY=$(mktemp /tmp/smartauth/smartauthmon.XXXXXXXXXX)
rm -rf $SECURE_DIRECTORY
mkdir -p $SECURE_DIRECTORY
chown root $SECURE_DIRECTORY
chgrp root $SECURE_DIRECTORY
chmod 600 $SECURE_DIRECTORY
# Restart PCSCD and kill spurious processes
killall -9 pcscd
/etc/init.d/pcscd restart
/etc/init.d/pcscd-nodbus restart
# See if required programs are installed
scriptor=$(whereis scriptor)
if [[ $scriptor == "scriptor:" ]]; then
echo "ERROR: scriptor is not installed! This program cannot continue!"
exit
fi
opensc=$(whereis opensc-explorer)
if [[ $opensc == "opensc-explorer:" ]]; then
echo "ERROR: opensc-explorer is not installed! This program cannot continue!"
exit
fi
get_file () {
if [[ $COMMAND_MODE == "acos" ]]; then
# Select EF $1 under DF 1000
echo "$SELECT_FILE $1" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
echo $(cat $SECURE_DIRECTORY/response2)
# Read binary
echo "$READ_BINARY" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
authokresponse="90 00 : Normal processing"
response1=$(cat $SECURE_DIRECTORY/response2 | grep "$authokresponse")
if [[ $response1 != "" ]]; then
cat $SECURE_DIRECTORY/response2 | tr -d '\n' > $SECURE_DIRECTORY/response4
stringtoreplace="Using T=0 protocol00 B0 00 00 FF> 00 B0 00 00 FF< "
newstring=""
sed -i "s#${stringtoreplace}#${newstring}#g" $SECURE_DIRECTORY/response4
stringtoreplace=" 90 00 : Normal processing."
newstring=""
sed -i "s#${stringtoreplace}#${newstring}#g" $SECURE_DIRECTORY/response4
if [[ $2 == "text" ]]; then
stringtoreplace=" 00"
newstring=""
sed -i "s#${stringtoreplace}#${newstring}#g" $SECURE_DIRECTORY/response4
fi
echo $(cat $SECURE_DIRECTORY/response4)
rm -f $SECURE_DIRECTORY/lukskey
xxd -r -p $SECURE_DIRECTORY/response4 $SECURE_DIRECTORY/lukskey
RESPONSE=$SECURE_DIRECTORY/lukskey
fi
fi
if [[ $COMMAND_MODE == "cryptoflex" ]]; then
FILE=${1/ /}
echo "get $FILE" | opensc-explorer
RESPONSE="3F00_$FILE"
fi
}
update_file () {
if [[ $COMMAND_MODE == "acos" ]]; then
# Select EF $1 under DF 1000
echo "$SELECT_FILE $1" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
echo $(cat $SECURE_DIRECTORY/response2)
# Update existing file
# Zero pad input file
dd if=/dev/zero of=$SECURE_DIRECTORY/response2 bs=1 count=255
dd if=$2 of=$SECURE_DIRECTORY/response2 bs=1 count=255 conv=notrunc
# Truncate to 255 bytes and expand to standard hex listing format
xxd -l 255 -ps -c 1 $SECURE_DIRECTORY/response2 > $SECURE_DIRECTORY/response
cat $SECURE_DIRECTORY/response | tr '\n' ' ' > $SECURE_DIRECTORY/hexready
echo "$UPDATE_BINARY $(cat $SECURE_DIRECTORY/hexready)" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2 2>/dev/null
echo $(cat $SECURE_DIRECTORY/response2)
fi
if [[ $COMMAND_MODE == "cryptoflex" ]]; then
# Delete old file
echo "$DELETE_FILE $1" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2 2>/dev/null
echo $(cat $SECURE_DIRECTORY/response2)
# Create new file
createfile "FF" $1
FILE=${1/ /}
echo "put $FILE $2" | opensc-explorer
fi
}
oldsmartcard_username=""
echo "Ready..."
while [[ 1 == 1 ]]; do
sleep 1
echo "exit" | scriptor 2>/dev/null 1>/dev/null
OUTPUT=$?
if [[ $OUTPUT -eq 0 ]]; then
echo "Card inserted!"
echo "TAuthenticating SmartCard..." > /tmp/ksocket-global/kdesktoplockcontrol &
# Get card ATR
echo "RESET" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
authokresponse="OK: "
response1=$(cat $SECURE_DIRECTORY/response2 | grep "$authokresponse")
if [[ $response1 != "" ]]; then
cat $SECURE_DIRECTORY/response2 | tr -d '\n' > $SECURE_DIRECTORY/response4
stringtoreplace="Using T=0 protocolRESET> RESET< OK: "
newstring=""
sed -i "s#${stringtoreplace}#${newstring}#g" $SECURE_DIRECTORY/response4
smartatr=$(cat $SECURE_DIRECTORY/response4)
echo "Got ATR: $smartatr"
if [[ $smartatr == "3B BE 18 00 00 41 05 10 00 00 00 00 00 00 00 00 00 90 00 " ]]; then
echo "Detected ACOS5 card"
COMMAND_MODE="acos"
fi
if [[ $smartatr == "3B 02 14 50 " ]]; then
echo "Detected Schlumberger CryptoFlex card"
COMMAND_MODE="cryptoflex"
fi
else
echo "No card detected!"
fi
if [[ $COMMAND_MODE == "cryptoflex" ]]; then
GET_CHALLENGE="C0 84 00 00 08"
EXTERNAL_AUTH="C0 82 00 00 07 01"
SELECT_FILE="C0 A4 00 00 02"
DELETE_FILE="F0 E4 00 00 02"
fi
if [[ $COMMAND_MODE == "acos" ]]; then
GET_CHALLENGE="00 84 00 00 08"
EXTERNAL_AUTH="00 82 00 82 08" # Key 2
SELECT_FILE="00 A4 00 00 02"
DELETE_FILE="00 E4 00 00 00"
READ_BINARY="00 B0 00 00 FF"
UPDATE_BINARY="00 D6 00 00 FF"
ACTIVATE_FILE="00 44 00 00 02"
fi
# Authenticate card
if [[ $COMMAND_MODE == "acos" ]]; then
# Select MF
echo "00 A4 00 00 00" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
echo $(cat $SECURE_DIRECTORY/response2)
# Select DF 1000 under MF
echo "$SELECT_FILE 10 00" > $SECURE_DIRECTORY/query
scriptor $SECURE_DIRECTORY/query 1> $SECURE_DIRECTORY/response2
echo $(cat $SECURE_DIRECTORY/response2)
fi
echo $GET_CHALLENGE > $SECURE_DIRECTORY/authscript
scriptor $SECURE_DIRECTORY/authscript | grep 'Normal processing' > $SECURE_DIRECTORY/challenge
perl -pi -e 's/ //g' $SECURE_DIRECTORY/challenge
perl -pi -e 's/:Normalprocessing.//g' $SECURE_DIRECTORY/challenge
perl -pi -e 's/<//g' $SECURE_DIRECTORY/challenge
xxd -r -p $SECURE_DIRECTORY/challenge $SECURE_DIRECTORY/challenge
# Now DES encrypt the challenge
# Later, change the initialization vector to random if possible
openssl des-ecb -in $SECURE_DIRECTORY/challenge -out $SECURE_DIRECTORY/response -K <your key in hexadecimal> -iv 1
if [[ $COMMAND_MODE == "acos" ]]; then
# Truncate to 8 bytes
dd if=$SECURE_DIRECTORY/response of=$SECURE_DIRECTORY/response2 bs=1 count=8
# Expand to standard hex listing format
xxd -g 1 $SECURE_DIRECTORY/response2 $SECURE_DIRECTORY/response
dd if=$SECURE_DIRECTORY/response of=$SECURE_DIRECTORY/response2 bs=1 count=23 skip=9
fi
if [[ $COMMAND_MODE == "cryptoflex" ]]; then
# Truncate to 6 bytes
dd if=$SECURE_DIRECTORY/response of=$SECURE_DIRECTORY/response2 bs=1 count=6
# Expand to standard hex listing format
xxd -g 1 $SECURE_DIRECTORY/response2 $SECURE_DIRECTORY/response
dd if=$SECURE_DIRECTORY/response of=$SECURE_DIRECTORY/response2 bs=1 count=17 skip=9
fi
# Assemble the response file
response2=$(cat $SECURE_DIRECTORY/response2)
response1="$EXTERNAL_AUTH ${response2}"
echo $response1 > $SECURE_DIRECTORY/response
# Send the response!
scriptor $SECURE_DIRECTORY/response > $SECURE_DIRECTORY/response2
# Get the result
authokresponse="< 90 00 : Normal processing"
response1=$(cat $SECURE_DIRECTORY/response2 | grep "$authokresponse")
echo $response1
if [[ $response1 != "" ]]; then
echo "Smart card validation successfull!"
# Get username and password
get_file "10 02" "text"
smartcard_username=$(cat $RESPONSE)
get_file "10 03" "text"
mv $RESPONSE $SECURE_DIRECTORY/password
get_file "10 04" "text"
smartcard_slave=$(cat $RESPONSE)
if [[ $smartcard_slave == "SLAVE" ]]; then
get_file "10 05" "text"
smartcard_minutes=$(cat $RESPONSE)
get_file "10 06" "text"
internet_minutes=$(cat $RESPONSE)
fi
else
echo "This card does not recognize this system!"
echo "EInvalid SmartCard Inserted" > /tmp/ksocket-global/kdesktoplockcontrol &
sleep 1
smartcard_username=""
rm -f $SECURE_DIRECTORY/password
smartcard_slave=""
fi
if [[ $smartcard_slave == "SLAVE" ]]; then
if [[ $smartcard_minutes == "" ]]; then
smartcard_minutes=1
fi
# Decrement minutes on card
if [[ $smartcard_minutes -gt 0 ]]; then
let "smartcard_minutes=smartcard_minutes-1"
echo $smartcard_minutes > $SECURE_DIRECTORY/minutes
update_file "10 05" "$SECURE_DIRECTORY/minutes"
fi
if [[ $smartcard_minutes -eq 0 ]]; then
echo "Minutes have been used up!"
# Prohibit logon
smartcard_username=""
rm $SECURE_DIRECTORY/password
fi
mkdir -p /etc/smartmon
echo $smartcard_minutes > /etc/smartmon/minutesremaining
chmod 755 /etc/smartmon/minutesremaining
fi
# Initialize variables
loginok=1
# Try to do the authentication
result=""
timeout=0
errcode=0
waserror=0
noactivesessions=0
$result=$(/opt/trinity/bin/kdmctl -g list)
if [[ $result == "ok" ]]; then
noactivesessions=1
result="okbutempty"
fi
echo $result
resultbkp=$result
if [[ $errcode -eq 0 ]]; then
# Allow KDM to finish starting
if [[ $waserror -eq 1 ]]; then
sleep 10
fi
# Zero the desktop array
index=0
while [[ $index != $MAXIMUM_VTS ]]; do
darray[index]=""
index=$((index+1))
done
if [[ result != "okbutempty" ]]; then
posone="0"
posone=$(expr index "$result" " :")
postwo="0"
postwo=$(expr index "$result" ",")
while [[ $posone != "0" ]]; do
length=$((postwo-posone-1))
terminals="${result:posone:length}"
echo $terminals
# Delete the terminal we just got from the list of terminals
result="${result:postwo}"
postwo=$(expr index "$result" ",")
result="${result:postwo}"
postwo=$(expr index "$result" ",")
length=$((postwo-1))
username="${result:0:length}"
darray[terminals]=$username # Save username of this terminal
echo $username
result="${result:postwo}"
postwo=$(expr index "$result" ",")
result="${result:postwo}"
# Now see if there might be ANOTHER terminal active or not
posone="0"
posone=$(expr index "$result" " :")
postwo="0"
postwo=$(expr index "$result" ",")
done
fi
# See if the desired user is already logged in
index=0
foundsession=0
while [[ $index != $MAXIMUM_VTS ]]; do
if [[ ${darray[index]} == $smartcard_username ]]; then
if [[ ${darray[index]} != "" ]]; then
echo "Found existing session on desktop: ${index}"
foundsession=1
# Check password
lverify=$(/usr/bin/smartauthckpasswd -u ${darray[index]} -p $(cat $SECURE_DIRECTORY/password))
cverify="User:${darray[index]}"
udisplay=":${index}"
if [[ $lverify == $cverify ]]; then
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface quit"
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface enable false"
/opt/trinity/bin/kdmctl activate $udisplay
else
echo "EUnauthorized SmartCard Inserted" > /tmp/ksocket-global/kdesktoplockcontrol &
fi
else
echo "Username not specified"
foundsession=2
sleep 1
fi
fi
index=$((index+1))
done
if [[ $foundsession == "0" ]]; then
echo "Existing session not found, starting new..."
# Make sure that this is not display :0 (default login screen).
# If it is, execute login. If not, create new session, then execute login
usebasedisplay=0
if [[ $noactivesessions -eq 1 ]]; then
newdisplay=$(ls /var/run/xdmctl/ | grep 'xdmctl-:0')
echo $newdisplay
if [[ $newdisplay != "" ]]; then
usebasedisplay=1
fi
fi
vtsessions=$(echo "$resultbkp" | grep ',vt')
if [[ $vtsessions == "" ]]; then
newdisplay=$(ls /var/run/xdmctl/ | grep 'xdmctl-:0')
echo $newdisplay
if [[ $newdisplay != "" ]]; then
usebasedisplay=1
fi
fi
echo "Creating new session"
# Attempt login
ls /var/run/xdmctl > $SECURE_DIRECTORY/originalxdm
# Set loop separator to end of line
BAKIFS=$IFS
IFS=$(echo -en "\n\b")
exec 3<&0
exec 0<"$SECURE_DIRECTORY/originalxdm"
newdisplayfound=0
newdisplay=-1
while read -r line
do
# use $line variable to process lines
line=$(echo $line | grep 'xdmctl-:' | sed -e 's/xdmctl-://')
if [ "`expr $line - $line 2>/dev/null`" == "0" ]; then
echo "Found active display on $line"
if [[ $newdisplayfound -eq 0 ]]; then
tempnewdisplay=$((newdisplay + 1))
if [[ $line -eq $tempnewdisplay ]]; then
echo "Sequential display $line found after display $newdisplay..."
newdisplay=$line
fi
fi
fi
done
exec 0<&3
newdisplay=$(($newdisplay + 1))
newdisplay=":$newdisplay"
echo "The next display to start will be $newdisplay"
rm $SECURE_DIRECTORY/originalxdm
/opt/trinity/bin/kdmctl -g reserve
/opt/trinity/bin/kdmctl -g login $newdisplay now $smartcard_username $(cat $SECURE_DIRECTORY/password)
sleep 2
/opt/trinity/bin/kdmctl -g activate $newdisplay
udisplay=$newdisplay
fi
if [[ $smartcard_slave == "SLAVE" ]]; then
if [[ $smartcard_minutes -lt 5 ]]; then
su $smartcard_username -c "export DISPLAY=$udisplay; zenity --warning --text 'You have less than 5 minutes of computer time remaining' || exit 0" &
fi
fi
rm -f $SECURE_DIRECTORY/password
#if [[ loginok -eq 1 ]]; then
# Wait for SmartCard removal
echo "C" > /tmp/ksocket-global/kdesktoplockcontrol &
TIMER=60
OUTPUT=0
while [[ $OUTPUT -eq 0 ]]; do
sleep 1
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface quit"
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface enable false"
echo "exit" | scriptor 2>/dev/null 1>/dev/null
OUTPUT=$?
if [[ $smartcard_slave == "SLAVE" ]]; then
TIMER=$(( TIMER - 1 ))
if [[ $TIMER -eq 0 ]]; then
# 60 seconds have passed, decrement minutes on card
let "smartcard_minutes=smartcard_minutes-1"
echo $smartcard_minutes > /etc/smartmon/minutesremaining
chmod 755 /etc/smartmon/minutesremaining
TIMER=60
echo $smartcard_minutes > $SECURE_DIRECTORY/minutes
update_file "10 05" "$SECURE_DIRECTORY/minutes"
if [[ $smartcard_minutes -eq 0 ]]; then
echo "Minutes have been used up!"
# Prohibit logon
smartcard_username=""
rm $SECURE_DIRECTORY/password
fi
mkdir -p /etc/smartmon
echo $smartcard_minutes > /etc/smartmon/minutesremaining
chmod 755 /etc/smartmon/minutesremaining
if [[ $smartcard_minutes -eq 5 ]]; then
su $smartcard_username -c "export DISPLAY=$udisplay; zenity --warning --text 'You have less than 5 minutes of computer time remaining' || exit 0" &
fi
if [[ $smartcard_minutes -eq 0 ]]; then
echo "Minutes have been used up!"
echo "Beginning logoff process"
OUTPUT=254
fi
fi
fi
done
echo "Card removed!"
# Is the user still logged in?
result="ok"
timeout=0
errcode=0
$result=$(/opt/trinity/bin/kdmctl -g list)
if [[ $result == "ok" ]]; then
noactivesessions=1
result="okbutempty"
fi
echo $result
# Zero the desktop array
index=0
while [[ $index != $MAXIMUM_VTS ]]; do
darray[index]=""
index=$((index+1))
done
posone="0"
posone=$(expr index "$result" " :")
postwo="0"
postwo=$(expr index "$result" ",")
while [[ $posone != "0" ]]; do
length=$((postwo-posone-1))
terminals="${result:posone:length}"
echo $terminals
# Delete the terminal we just got from the list of terminals
result="${result:postwo}"
postwo=$(expr index "$result" ",")
result="${result:postwo}"
postwo=$(expr index "$result" ",")
length=$((postwo-1))
username="${result:0:length}"
darray[terminals]=$username # Save username of this terminal
echo $username
result="${result:postwo}"
postwo=$(expr index "$result" ",")
result="${result:postwo}"
# Now see if there might be ANOTHER terminal active or not
posone="0"
posone=$(expr index "$result" " :")
postwo="0"
postwo=$(expr index "$result" ",")
done
# See if the desired user is still logged in
index=0
foundsession=0
while [[ $index != $MAXIMUM_VTS ]]; do
if [[ ${darray[index]} == $smartcard_username ]]; then
if [[ ${darray[index]} != "" ]]; then
echo "Found existing session on desktop: ${index}"
udisplay=":${index}"
foundsession=1
errcode=1
timeout=0
blankresult=""
while [[ $blankresult != "true" ]]; do
/opt/trinity/bin/kdmctl -g activate $udisplay
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface enable true"
su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface lock"
blankresult=$(su $smartcard_username -c "export DISPLAY=$udisplay; /opt/trinity/bin/dcop kdesktop KScreensaverIface isBlanked")
if [[ $? != 0 ]]; then
blankresult="true"
fi
logouttest=$(echo $blankresult | grep 'target display has no VT assigned')
if [[ "$logouttest" != "" ]]; then
echo "User has logged out"
blankresult="true"
fi
done
else
echo "Username not specified!"
sleep 1
fi
fi
index=$((index+1))
done
#fi
fi
smartcard_username=""
rm -rf /etc/smartmon/minutesremaining
echo "C" > /tmp/ksocket-global/kdesktoplockcontrol &
fi
done