Add script 'bind_create_dkim_delegation.sh'
This commit is contained in:
parent
eeae035ce2
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521
bind_create_dkim_delegation.sh
Executable file
521
bind_create_dkim_delegation.sh
Executable file
@ -0,0 +1,521 @@
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#!/usr/bin/env bash
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# - Adds DKIM subdomain delegation for a given domain
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# -
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# - Return (Exit) Codes:
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# - success:
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# - 0: DKIM subdomain delegation already exists
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# - 1: DKIM subdomain delegation added
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# - error:
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# - 11: No zonefile found
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# - 15: Hostname/Domain not supported
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# - 16: Determin Nameservers failed
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# - 21: Adding Record failed
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# - 99: Fatal error
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# -
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# - Example:
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# - bind_create_dkim_delegation.sh oopen.de
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script_name="$(basename $(realpath $0))"
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working_dir="$(dirname $(realpath $0))"
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conf_file="${working_dir}/conf/bind.conf"
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log_file="$(mktemp)"
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backup_date="$(date +%Y-%m-%d-%H%M)"
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# ----------
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# Setting Defaults
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# ----------
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DEFAULT_CONF_FILE_DIR="/etc/bind"
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DEFAULT_BIND_USER="bind"
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DEFAULT_BIND_GROUP="bind"
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# **********
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# Don't make changes after this
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# **********
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# ----------
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# Base Function(s)
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# ----------
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usage() {
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[[ -n "$1" ]] && error "$1"
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[[ $verbose ]] && echo -e "
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\033[1mUsage:\033[m
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$(basename $0) [Options] <dkim-domain> | check
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\033[1mDescription\033[m
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Scripts add a nameserver delegation for zone _domainkey.<dkim-domain>. The nameserver
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for the new zone are the same as for the domain itself.
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\033[1mReturn (Exit) Codes\033[m
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success:
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0: DKIM subdomain delegation already exists
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1: DKIM subdomain delegation added
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error:
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11: No zonefile found
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15: Hostname/Domain not supported
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16: Determin Nameservers failed
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21: Adding Record failed
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99: Fatal error
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\033[1mOptions\033[m
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-h
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Prints this help.
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-q
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Runs in silent mode.
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\033[1mFiles\033[m
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$conf_file: Configuration file
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\033[1mExample:\033[m
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Create DKIM delegation for domain oopen.de.
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\033[1m$(basename $0) oopen.de\033[m
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This results in NS Records like:
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_domainkey.oopen.de. IN NS name-server-1
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_domainkey.oopen.de. IN NS name-server-2
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"
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clean_up 1
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}
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clean_up() {
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# Perform program exit housekeeping
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rm $log_file
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blank_line
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exit $1
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}
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echononl(){
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if $verbose ; then
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echo X\\c > /tmp/shprompt$$
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if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
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echo -e -n " $*\\c" 1>&2
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else
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echo -e -n " $*" 1>&2
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fi
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rm /tmp/shprompt$$
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fi
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}
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warn (){
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if $verbose ; then
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echo ""
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echo -e " [ \033[33m\033[1mWarning\033[m ]: $*"
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echo ""
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fi
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}
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info (){
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if $verbose ; then
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echo ""
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echo -e " [ \033[32m\033[1mInfo\033[m ]: $*"
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echo ""
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fi
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}
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error(){
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if $verbose ; then
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echo ""
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echo -e " [ \033[31m\033[1mFehler\033[m ]: $*"
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echo ""
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fi
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}
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echo_ok() {
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if $verbose ; then
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echo -e "\033[75G[ \033[32mok\033[m ]"
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fi
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}
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echo_failed(){
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if $verbose ; then
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echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
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fi
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}
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echo_skipped() {
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if $verbose ; then
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echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
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fi
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}
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backup_dir () {
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dir_to_backup=$1
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echononl "Backup existing directory \"$dir_to_backup\" .."
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if [[ -d "$dir_to_backup" ]] ; then
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cp -a "$dir_to_backup" "${dir_to_backup}.$backup_date" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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error "Backup directory \"$dir_to_backup\" failed!"
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clean_up 99
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fi
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else
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echo_failed
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error "Directory \"$dir_to_backup\" not found. No Backup written!"
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clean_up 99
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fi
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}
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blank_line() {
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if $verbose ; then
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echo ""
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fi
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}
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trim() {
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local var="$*"
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var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
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var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
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echo -n "$var"
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}
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# ----------
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# - Jobhandling
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# ----------
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# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
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# -
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trap clean_up SIGHUP SIGINT SIGTERM
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# ----------
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# - Some checks ..
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# ----------
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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verbose=true
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else
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verbose=false
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fi
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# -Is systemd supported on this system?
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# -
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systemd_supported=false
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systemd=$(which systemd)
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systemctl=$(which systemctl)
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if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
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systemd_supported=true
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fi
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# - Print help?
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# -
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if [[ "$(trim $*)" = " -h" ]] || [[ "$(trim $*)" = " --help" ]] ; then
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usage
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fi
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if [[ -z "$(which basename)" ]]; then
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fatal 'It seems "basename" is not installed, but needed!'
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fi
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if [[ -z "$(which realpath)" ]]; then
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fatal 'It seems "realpath" is not installed, but needed!'
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fi
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# ==========
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# - Begin Main Script
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# ==========
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# ----------
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# - Headline
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# ----------
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if $terminal ; then
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echo ""
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echo -e "\033[1m----------\033[m"
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echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
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echo -e "\033[1m----------\033[m"
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fi
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# ----------
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# - Read commandline parameter
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# ----------
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while getopts bh opt ; do
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case $opt in
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q) verbose=true
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;;
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h) usage
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;;
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\?) usage
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;;
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*) ;;
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esac
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done
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#shift $(expr $OPTIND - 1)
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#[[ $# -eq "1" ]] || usage "Wrong number of arguments!"
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if [[ "$1" = "check" ]]; then
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info "Script \033[1m$(basename $0)\033[m was successfully invoked, but its only a test."
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clean_up 0
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fi
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dkim_domain="$1"
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# ----------
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# Read Configurations from $conf_file
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# ----------
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blank_line
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echononl "Loading default Configuration values from $(basename ${conf_file}).."
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if [[ ! -f "$conf_file" ]]; then
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echo_skipped
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else
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source "${conf_file}" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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fatal "$(cat $log_file)"
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fi
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fi
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[[ -n "$CONF_FILE_DIR" ]] || CONF_FILE_DIR="$DEFAULT_CONF_FILE_DIR"
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[[ -n "$ZONES_DECLARATION_FILE" ]] || ZONES_DECLARATION_FILE="${CONF_FILE_DIR}/named.conf.local"
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[[ -n "$BIND_USER" ]] || BIND_USER="$DEFAULT_BIND_USER"
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[[ -n "$BIND_GROUP" ]] || BIND_GROUP="$DEFAULT_BIND_GROUP"
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# - Determin zone (domain)
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# -
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blank_line
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echononl "Determine zone for '$dkim_domain'"
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_failed=false
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_hostname=$dkim_domain
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_tmp_hostname=$(echo ${_hostname//\./\\.})
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while ! grep -e "$_tmp_hostname" $ZONES_DECLARATION_FILE > /dev/null 2>&1 ; do
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_hostname=${_hostname#*.}
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_tmp_hostname=$(echo ${_hostname//\./\\.})
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if [[ ! $_tmp_hostname =~ \. ]]; then
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_failed=true
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break
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fi
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done
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if $_failed ; then
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echo_failed
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error "Given hostname/domain \"$dkim_domain\" not supported by this nameserver!"
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exit 15
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else
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echo_ok
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domain=$_hostname
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fi
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# - Determine zonefile (by reading bind configuration)
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# -
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echononl "Determine zonefile (by reading bind configuration)"
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_found=false
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declare -i _number=0
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regex_zone="^[[:space:]]*zone[[:space:]]+\"$_tmp_hostname\""
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regex_file="^[[:space:]]*file"
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while IFS='' read -r line || [[ -n "$line" ]] ; do
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if [[ $line =~ $regex_zone ]]; then
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_found=true
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fi
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if $_found ; then
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if [[ $line =~ $regex_file ]]; then
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zone_file=`echo $line | awk '{print$2}'`
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shopt -s extglob
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if [[ $zone_file =~ \; ]]; then
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zone_file=${zone_file%%*(\;)}
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fi
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if [[ $zone_file =~ ^\" ]]; then
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zone_file=${zone_file##*(\")}
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zone_file=${zone_file%%*(\")}
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fi
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shopt -u extglob
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let number++
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break
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fi
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fi
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done < $ZONES_DECLARATION_FILE
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if [[ $number -eq 0 ]] ; then
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echo_failed
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error "No Zonefile (master) found for domain \"$dkim_domain\" ."
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clean_up 11
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else
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echo_ok
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zone_file_dir="$(dirname $zone_file)"
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fi
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# - Check if subdomain delegation already exists
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# -
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record_name="_domainkey.$dkim_domain"
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record_type="NS"
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if grep -E "^(${record_name}\..+$record_type|_domainkey\s+.+$record_type)" $zone_file > /dev/null 2>&1 ; then
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info "Subdomain delegation for $record_name already exists!"
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clean_up 0
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fi
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# - We will place the new NS Record after the last existing one.
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# -
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# - first we will count the number ox existing NS records
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# -
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declare -i _count
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search_string="^[^;].+\s+IN\s+NS"
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_count=$(grep -Eo "$search_string" $zone_file | wc -l)
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if [[ $_count -eq 0 ]]; then
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error "No existing NS record found. Check and add subdomain delegation manually!"
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clean_up 99
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fi
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# - Get DNS server
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# -
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echononl "Get Namservers for domain '$domain'"
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dns_servers="$(grep -E "^\s*(@|)\s+IN\s+NS" $zone_file 2>/dev/null | sed 's/@//' | sed 's/\.$//' | awk '{print$3}')"
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if [[ -n "$dns_servers" ]]; then
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echo_ok
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else
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echo_failed
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error "Determin DNS servers for domain '$domain' failed!"
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clean_up 16
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fi
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# - This is needed, because the dns servers are requested above, in
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# - an IFS='' environment!
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# -
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declare -i i=0
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for _dns_server in $dns_servers ; do
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dns_server_arr+=("$_dns_server")
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done
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# - Backup zone directory
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# -
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blank_line
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backup_dir $zone_file_dir
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blank_line
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# - Add subdomain delegation
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# -
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CUR_IFS=$IFS
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IFS=''
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_tmpfile=`mktemp`
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> $_tmpfile
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echononl "Add Subdomain delegation for DKIM TXT Records .."
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while read -r line || [[ -n "$line" ]]; do
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echo $line >> $_tmpfile
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if echo "$line" | grep -E "$search_string" > /dev/null 2>&1 ; then
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let _count--
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fi
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if [[ $_count -eq 0 ]]; then
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echo "" >> $_tmpfile
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echo "; Subdomain delegation for DKIM TXT Records" >> $_tmpfile
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declare -i _number=0
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while [[ $_number -lt ${#dns_server_arr[@]} ]] ; do
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if [[ "$dkim_domain" = "$domain" ]] ; then
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echo -e "_domainkey.${dkim_domain}. IN NS ${dns_server_arr[${_number}]}." >> $_tmpfile
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fi
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((_number++))
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done
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echo "" >> $_tmpfile
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_count=-1
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fi
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done < "$zone_file"
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if [[ $? -eq 0 ]] ; then
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echo_ok
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else
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echo_failed
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rm $_tmpfile
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exit 21
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fi
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IFS=$CUR_IFS
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mv $_tmpfile $zone_file
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# - Set Correct Owner/Permission
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# -
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blank_line
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echononl "Correct Owner for $zone_file .."
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chown $BIND_USER:$BIND_GROUP $zone_file
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if [[ $? -eq 0 ]] ; then
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echo_ok
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else
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echo_failed
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error "Setting ownership for '$zone_file' failed!"
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clean_up 99
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fi
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echononl "Correct permissions on $zone_file .."
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chmod 644 $zone_file
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if [[ $? -eq 0 ]] ; then
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echo_ok
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else
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echo_failed
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error "Correct permissions on '$zone_file' failed!"
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clean_up 99
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fi
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_return_value=1
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# - Remove backup of zonefile directory if no changes are made
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# -
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if [[ -d "${zone_file_dir}.$backup_date" ]] ; then
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diff -Nur "$zone_file_dir" "${zone_file_dir}.$backup_date" > /dev/null 2>&1
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if [[ $? -eq 0 ]]; then
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info "No zone file has changed.\n Removing previously created backup."
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echononl "Delete '${zone_file_dir}.$backup_date'.."
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rm -rf "${zone_file_dir}.$backup_date" > $log_file 2>&1
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if [[ $? -eq 0 ]]; then
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echo_ok
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else
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echo_failed
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fi
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fi
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fi
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warn "Serial was not incremented and zone not reloaded.\n Use script \033[1mbind_set_new_serial.sh\033[m to do that."
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blank_line
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clean_up $_return_value
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