393 lines
10 KiB
Bash
393 lines
10 KiB
Bash
#!/bin/bash
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#
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# Name: pam_panic_config
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# Description: Create a pam_panic configuration.
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# Author: Bandie <bandie@chaospott.de>
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#
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CONFIGFILE="/etc/pam.d/pampanic"
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LHBU="$HOME/LUKSHeaderBackup"
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# Set on build time
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SECUREDIR="__SECURELIBDIR__"
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PAMPANICPW="__PAMPANICPW__"
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# Localization
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N_(){
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gettext "pam_panic" "$1"
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}
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NOT_BUILT=$(N_ "ERROR: Bash script was not built correctly.")
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RUN_AS_ROOT=$(N_ "Please run this script as root or use sudo.")
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BACKTITLE=$(N_ "pam_panic's Configuration Generator.")
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BYE=$(N_ "Bye! :)")
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OK=$(N_ "OK")
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CANCEL=$(N_ "Cancel")
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AUTH=$(N_ "Authentication")
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PANIC=$(N_ "Panic")
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PREWARN_REMOVE=$(N_ "Please remove all removable media devices before you continue.")
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PREWARN_GPT=$(N_ "Note, if your device doesn't show up in the upcoming list it might not be a GPT formatted device.")
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PREWARN_INSERT_AUTH=$(N_ "Please insert the device you want to use as Authentication device and press OK.")
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PREWARN_INSERT_PANIC=$(N_ "Please insert the device you want to use as Panic device and press OK.")
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TITLE_RM_AUTH=$(N_ "Removable media: Authentication device")
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TITLE_RM_PANIC=$(N_ "Removable media: Panic device")
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CHOOSE_DEV=$(N_ "Choose your device:")
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DETECT_DEV=$(N_ "Detecting devices...")
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WELCOME=$(N_ "Welcome!")
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WELCOME1=$(N_ "Welcome to pam_panic's Configuration Generator.")
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WELCOME2=$(N_ "It will help you to create a valid pam_panic setup. It will also generate a PAM configuration file.")
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WELCOME3=$(N_ "After you're done with this Configuration Generator, you will see some hints how to integrate the new PAM configuration file in your system.")
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AUTH_MODE=$(N_ "Authentication mode")
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PASSWORDS=$(N_ "Passwords")
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REM_MEDIA=$(N_ "Media")
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CHOOSE_AUTH1=$(N_ "You can choose between the \"two removable media\" option and the \"two passwords\" option.")
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CHOOSE_AUTH2=$(N_ "See \"Help\" to learn what it is.")
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CHOOSE_AUTH3=$(N_ "Removable media or passwords?")
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UUID_AUTH=$(N_ "Authentication device chosen with UUID")
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UUID_PANIC=$(N_ "Panic device chosen with UUID")
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ASK_SET_PW=$(N_ "Do you want to set the passwords now?")
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SET_PW_FAILED=$(N_ "Failed to set the passwords. :(")
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PAM_PANICS_BEHAVIOUR=$(N_ "pam_panic's behaviour")
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ASK_SERIOUS1=$(N_ "Do you wish to destroy your LUKS header in case of emergency?")
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ASK_SERIOUS2=$(N_ "This means that your encrypted root partition won't be decryptable anymore. After this question we will create a LUKS header backup, if you wish.")
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MSG_SERIOUS1=$(N_ "We will destroy")
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MSG_SERIOUS2=$(N_ "when you trigger the panic function.")
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ASK_LUKS_BU1=$(N_ "Do you want to make a LUKS-Header backup now?")
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ASK_LUKS_BU2=$(N_ "Save location:")
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LUKS_BU_SAVED=$(N_ "The LUKSHeader backup has been saved here:")
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SERIOUS_ERROR=$(N_ "ERROR: There is no encrypted root partition on /dev/sda.")
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REBOOT=$(N_ "Reboot")
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SHUTDOWN=$(N_ "Shutdown")
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NOTHING=$(N_ "Nothing")
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ASK_EXTENDED_BEHAVIOUR=$(N_ "Do you wish a reboot or a shutdown after issuing the panic function? Or shall we do nothing at all?")
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GEN_CONFIG=$(N_ "Generating configuration...")
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CONFIG_EXISTS=$(N_ "Config file exists")
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CONFIG_OVERWRITE=$(N_ "exists. Overwrite it?")
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WHATNOW=$(N_ "What now?")
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SAVEDTO=$(N_ "Now we saved our configuration to")
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APPLY_THEM=$(N_ "If you want to let them apply to the other modules, proceed as follows:")
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OPEN_MOD=$(N_ "Open a module configuration in")
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TRY_OUT=$(N_ "You can try out:")
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AND=$(N_ "and")
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APPEND=$(N_ "After the line \"#%PAM-1.0\" append")
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UBUNTU_NOTICE=$(N_ "On Ubuntu you might want to separate the above mentioned lines on the files common-auth for the \"auth\" part and common-account for the \"account\" part.")
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PAMPANIC_ACTIVE=$(N_ "Once you have changed and saved those files, pam_panic will be active.")
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NEXT_LOGIN=$(N_ "At your next login you need to")
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TYPEPW=$(N_ "type your pam_panic authentification password or")
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INSRM=$(N_ "insert your removable authentication media")
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PREVTOREG=$(N_ "previous your regular user password.")
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QUESTIONS=$(N_ "If you got any question, don't hesitate to ask via IRC (chat.freenode.net in room #pampanic) or via mail + GPG.")
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PRESSENTER=$(N_ "Press enter to exit.")
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[[ ! -d $SECUREDIR ]] || [[ ! -f $PAMPANICPW ]] && { echo "$NOT_BUILT" ; exit 1 ; }
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if [ $EUID -ne 0 ]; then
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echo "$RUN_AS_ROOT"
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exit 1
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fi
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# Call when using the Cancel button
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function cancel(){
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rm -f .pam_panic_media_choice
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clear
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echo "$BYE"
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exit 0
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}
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# Call when CTRL+C
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trap "cancel" INT
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# Check, if $1 is a gpt formatted device
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function checkGPT(){
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blkid $1 -t PTTYPE=gpt >> /dev/null
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return $?
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}
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# Get the GPT PartitionUUID
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function getPARTUUID(){
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blkid $1 | awk '{print $4;}' | sed 's/PARTUUID="//;s/"//'
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}
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# Get the LUKS-Device's UUId
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function getLUKSDevice(){
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if [ "$1" = "UUID" ]; then
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blkid /dev/sda*[1-9] | grep "crypto_LUKS" | awk '{print $2;}' | sed 's/UUID="//;s/"//'
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fi
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if [ "$1" = "NAME" ]; then
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blkid /dev/sda*[1-9] | grep "crypto_LUKS" | awk '{print $1;}' | sed 's/://'
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fi
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}
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# Generic dialog question
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function ask(){
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dialog --backtitle "$BACKTITLE" --title "$1" --yesno "$2" 8 80
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return $?
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}
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# Generic message box
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msg() {
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dialog --backtitle "$BACKTITLE" --title "$1" --msgbox "$2" 8 80
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}
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# Generate a two dimensional flat array of all GPT devices from sdb-sdz
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function getMediaDevice(){
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local i=0
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local uuid
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for dev in $(ls /dev/sd[b-z] 2> /dev/null); do
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if $(checkGPT $dev); then
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for part in $(ls $dev*[1-9]); do
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echo -n "$i $part[$(getPARTUUID $part)] "
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(( i++ ))
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done
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fi
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done
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}
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# Hint for GPT formatted key before searching for it
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function chooseMediumPre(){
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[[ $1 = "Authentication" ]] && { local title="$TITLE_RM_AUTH" ; local insert="$PREWARN_INSERT_AUTH" ; }
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[[ $1 = "Panic" ]] && { local title="$TITLE_RM_PANIC"; local insert="$PREWARN_INSERT_PANIC" ; }
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dialog --backtitle "$BACKTITLE" --title "$title" --yes-label "$OK" --no-label "$CANCEL" --yesno "$PREWARN_REMOVE\n$PREWARN_GPT\n\n$insert" 20 80
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if [ $? -eq 1 ]; then
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cancel
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fi
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}
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# Choosing a GPT formatted key
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function chooseMedium(){
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local ans
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[[ $1 = "Authentication" ]] && { local title="$TITLE_RM_AUTH" ; }
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[[ $1 = "Panic" ]] && { local title="$TITLE_RM_PANIC" ; }
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dialog --backtitle "$BACKTITLE" --title "$title" --menu "$CHOOSE_DEV" 10 80 5 $media 2> .pam_panic_media_choice
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if [ $? -eq 1 ]; then
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cancel
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fi
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ans=$(cat .pam_panic_media_choice)
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(( ans=(2*ans)+1 ))
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rm -f .pam_panic_media_choice
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return $ans
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}
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# A "Detecting devices...", assures to use a more up to date device list
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function showDetectDev(){
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dialog --backtitle "$BACKTITLE" \
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--title "$title" \
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--infobox "$DETECT_DEV" 3 80
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# Prevention for impatient beings
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sleep 2
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}
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# Welcome
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dialog --backtitle "$BACKTITLE" \
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--title "$WELCOME" \
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--ok-label "Yip!" \
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--msgbox "$WELCOME1\n\n$WELCOME2\n\n$WELCOME3" 20 80
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# Authentication mode
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auth_mode=2
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while [ $auth_mode -eq 2 ]; do
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dialog --backtitle "$BACKTITLE" \
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--title "$AUTH_MODE" \
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--help-button \
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--extra-button --extra-label "$PASSWORDS" \
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--ok-label "$REM_MEDIA" \
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--yesno "$CHOOSE_AUTH1\n$CHOOSE_AUTH2\n\n$CHOOSE_AUTH3" 10 80
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auth_mode=$?
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case $auth_mode in
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"0")
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# Removable media
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# Authentication
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while [ -z $media ]; do
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chooseMediumPre Authentication
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showDetectDev
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media=$(getMediaDevice)
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read -r -a mediaArray <<< "$media"
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done
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chooseMedium Authentication
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auth_dev=$(echo ${mediaArray[$?]} | sed 's/\/dev\/sd[b-z]*[0-1]\[//;s/\]//')
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msg "$TITLE_RM_AUTH" "$UUID_AUTH $auth_dev."
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# Panic
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unset media
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while [ -z $media ]; do
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chooseMediumPre Panic
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showDetectDev
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media=$(getMediaDevice)
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read -r -a mediaArray <<< "$media"
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done
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chooseMedium Panic
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panic_dev=$(echo ${mediaArray[$?]} | sed 's/\/dev\/sd[b-z]*[0-1]\[//;s/\]//')
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msg "$TITLE_RM_PANIC" "$UUID_PANIC $panic_dev."
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;;
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"3")
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# Passwords
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ask "$PASSWORDS" "$ASK_SET_PW"
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setpw=$?
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case $setpw in
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"0")
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clear
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$PAMPANICPW
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if [ $? -ne 0 ]; then
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clear
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echo "$SET_PW_FAILED"
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exit 1
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fi
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;;
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esac
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;;
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"2")
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# Help
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man pam_panic
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;;
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"1")
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# Cancel
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cancel
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;;
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esac
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done
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# serious flag
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ask "$PAM_PANICS_BEHAVIOUR" "$ASK_SERIOUS1\n$ASK_SERIOUS2"
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serious=$?
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if [ $serious -eq 0 ]; then
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serious_dev=$(getLUKSDevice UUID)
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if [ ! -z $serious_dev ]; then
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msg "$PAM_PANICS_BEHAVIOUR" "$MSG_SERIOUS1 $(getLUKSDevice NAME) [$serious_dev] $MSG_SERIOUS2"
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# LUKS header backup
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ask "LUKS Header backup" "$ASK_LUKS_BU1\n$ASK_LUKS_BU2 \"$LHBU\"."
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bu=$?
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case $bu in
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"0")
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cryptsetup luksHeaderBackup $(getLUKSDevice NAME) --header-backup-file "$LHBU"
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msg "LUKS Header backup" "$LUKS_BU_SAVED $LHBU"
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;;
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esac
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else
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msg "$PAM_PANICS_BEHAVIOUR" "$SERIOUS_ERROR"
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serious=1
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fi
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fi
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# poweroff / reboot behaviour
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dialog --backtitle "$BACKTITLE" \
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--title "$PAM_PANICS_BEHAVIOUR" \
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--ok-label "$REBOOT" \
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--extra-button --extra-label "$SHUTDOWN" \
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--cancel-label "$NOTHING" \
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--yesno "$ASK_EXTENDED_BEHAVIOUR" 10 80
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power=$?
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# Configuration generation
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dialog --backtitle "$BACKTITLE" \
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--infobox "$GEN_CONFIG" 3 40
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config="#%PAM-1.0\nauth requisite $SECUREDIR/pam_panic.so"
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case $power in
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"0")
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config="$config reboot"
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;;
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"3")
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config="$config poweroff"
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;;
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esac
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case $auth_mode in
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"3")
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config="$config password"
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;;
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"0")
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config="$config allow=$auth_dev reject=$panic_dev"
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;;
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esac
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case $serious in
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"0")
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config="$config serious=$serious_dev"
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;;
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esac
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config="$config\naccount requisite $SECUREDIR/pam_panic.so"
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# Write config file
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writeout=0
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if [ -f $CONFIGFILE ]; then
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ask "CONFIG_EXISTS" "$CONFIGFILE $CONFIG_OVERWRITE"
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writeout=$?
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case $writeout in
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"0")
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echo -e "$config" > $CONFIGFILE
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;;
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esac
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else
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echo -e "$config" > $CONFIGFILE
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fi
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# Finished message
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clear
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[ $writeout -eq 0 ] && echo "Done! <3" || echo "Nothing done! </3"
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echo -e "\n
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$WHATNOW"
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for (( i=0; i<${#WHATNOW}; i++ )); do
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echo -n "="
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done
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echo -e "
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$SAVEDTO $CONFIGFILE.
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$APPLY_THEM
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1. $OPEN_MOD /etc/pam.d/
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$TRY_OUT
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- xscreensaver
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- system-local-login (Arch Linux)
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- common-auth $AND common-account (Ubuntu)
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2. $APPEND
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auth include pampanic
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account include pampanic
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$UBUNTU_NOTICE
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$PAMPANIC_ACTIVE
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$NEXT_LOGIN
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- $TYPEPW
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- $INSRM
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$PREVTOREG
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" | more
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echo "$QUESTIONS"
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echo -e "\n$PRESSENTER"
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read -n1
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