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#!/bin/bash # # Copyright © 2004 Patrick Koetter # # 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/>. # ##################################################################### # VARIABLES # ##################################################################### # set -e scriptname="${0##*/}" scriptversion=1.0.4 declare -a sasl_dirs valid_sasl_lib_names sasl_dirs=(/usr/lib/sasl \ /usr/lib64/sasl2 \ /var/lib/sasl \ /opt/lib/sasl \ /usr/lib/sasl2 \ /var/lib/sasl2 \ /opt/lib/sasl2 \ /usr/local/lib/sasl2 \ /etc/sasl2 \ /etc/postfix/sasl \ /etc/cyrus-sasl \ /usr/pkg/lib) sasl_libs=(libsasl.so libsasl2.so) ##################################################################### # COMMANDS AND FUNCTIONS # ##################################################################### export PATH="/bin:/sbin:/usr/bin:/usr/sbin:$PATH" function start () { echo "${scriptname} - postfix Cyrus sasl configuration $(date)" echo "version: ${scriptversion}" echo "mode: ${mode} SMTP AUTH" } function end () { echo "-- end of ${scriptname} output --" } function postconf_get () { postconf -h ${1}; } function get_saslpasswd () { postconf -h smtp_sasl_password_maps | sed -e s/^.*://; } function get_mail_version () { declare -a systems local systems=("/etc/redhat-release" "/etc/fedora-release" "/etc/slackware-version" "/etc/gentoo-release" "/etc/issue" "/etc/motd") echo "-- basics --" echo "Postfix: $(postconf_get mail_version)" for system in ${systems[@]}; do if [[ -e ${system} ]]; then echo "System: $(cat ${system})" break else continue fi done } function get_sasl_dirs () { local i=0 local sasldir="" for sasldir in ${sasl_dirs[@]}; do if [ -d ${sasldir} ]; then valid_sasldirs[$i]=${sasldir} let "i = $i + 1" fi done if ! [[ ${valid_sasldirs[@]} ]]; then echo -e "\aCould not find any valid Cyrus SASL directories." echo "Cyrus SASL is required to setup SMTP AUTH!" exit 72 fi } function get_sasl_support () { local sasllib="" echo "-- $1 is linked to --" for sasllib in ${sasl_libs[@]}; do local ldd_res="$(ldd "$(postconf_get daemon_directory)/${1}" | egrep -e "${sasllib}" 2>/dev/null)" if [ -n "${ldd_res}" ]; then echo "${ldd_res}" fi done } function get_smtp_dialogue () { echo "-- mechanisms on ${1} --" if echo "EHLO $HOSTNAME\r\nQUIT\r\n" | nc -w 1 -v ${1} 25 2>/dev/null | egrep "AUTH" 2>/dev/null; then echo elif echo "EHLO $HOSTNAME\r\nQUIT\r\n" | netcat -w 1 -v ${1} 25 2>/dev/null | egrep "AUTH" 2>/dev/null; then echo else (echo "EHLO $HOSTNAME"; sleep 2) | telnet ${1} 25 2>/dev/null | egrep "(AUTH)" fi } function get_maincf () { if test ${1} = "smtpd"; then local authparams="(^smtpd_sasl_*|broken_sasl_auth_clients|^smtpd_use_tls|^smtpd_tls_*)" elif test ${1} = "smtp"; then local authparams="(^smtp_sasl_*|^relayhost|^smtp_use_tls|^smtp_tls_*)" fi for daemon in ${1}; do echo "-- active SMTP AUTH and TLS parameters for ${1} --" if postconf -n | egrep -i ${authparams} 2> /dev/null; then continue else echo -e "\aNo active SMTP AUTH and TLS parameters for ${1} in main.cf!" echo "SMTP AUTH can't work!" exit 72 fi done } function get_sasl_apps () { active_services[0]="" if [[ $(egrep -v "^#.*smtpd_sasl_application_name" $(postconf_get config_directory)/master.cf |\ egrep "^.*smtpd_sasl_application_name" 2>/dev/null) ]]; then active_services=$(egrep -v "^#.*smtpd_sasl_application_name" $(postconf_get config_directory)/master.cf |\ egrep "^.*smtpd_sasl_application_name" | sed 's/.*-o smtpd_sasl_application_name=//g' | awk '{print $1}') else active_services[0]="smtpd" fi } function get_service_config () { # Add /etc/postfix/sasl to valid_sasldirs for Debian users. sasl_dirs[100]="/etc/postfix/sasl" local o=1 local sasldir="" local service="" for sasldir in ${sasl_dirs[@]}; do local i=1 for service in ${active_services[@]}; do if [ -e ${sasldir}/${service}.conf ]; then valid_services[$i$o]=${sasldir}/${service}.conf let "i = $i + 1" elif ! [ -e ${sasldir}/${service}.conf ]; then continue fi done let "o+=1" done if ! [[ ${valid_services[@]} ]]; then echo; echo -e "\aThere is no smtpd.conf that defines what SASL should do for Postfix." echo "SMTP AUTH can't work!"; echo exit 72 fi } function list_service_configs () { local smtpdconf="" for smtpdconf in ${valid_services[@]}; do echo "-- content of ${smtpdconf} --" cat ${smtpdconf} | sed -e 's/.*ldapdb_id.*/ldapdb_id: --- replaced ---/;s/.*sql_user:.*/sql_user: --- replaced ---/g;'\ -e 's/.*ldapdb_pw:.*/ldapdb_pw: --- replaced ---/g;s/.*sql_passwd:.*/sql_passwd: --- replaced ---/g' echo done } function list_sasl_dirs () { local sasldir="" for sasldir in ${valid_sasldirs[@]}; do echo "-- listing of ${sasldir} --"; ls -alL ${sasldir}; echo done } function get_mastercf () { echo "-- active services in $(postconf_get config_directory)/master.cf --" echo "$(egrep "(^# service type|\(yes\))" $(postconf_get config_directory)/master.cf)" echo "$(cat $(postconf_get config_directory)/master.cf | egrep -v "^#")" } function check_saslpasswd () { saslpasswd=$(postconf_get smtp_sasl_password_maps | sed -e s/^.*://) if ! [ $(get_saslpasswd) ]; then echo -e "\aCannot find the smtp_sasl_password_maps parameter in main.cf." echo "Client-side SMTP AUTH cannot work without this parameter!" exit 78 elif [ -e $(get_saslpasswd) ]; then echo "-- permissions for $(get_saslpasswd) --"; echo "`ls -al ${saslpasswd}`"; echo if [ -e $(get_saslpasswd).db ]; then echo "-- permissions for $(get_saslpasswd).db --"; echo "`ls -al ${saslpasswd}.db`"; echo if [ $(get_saslpasswd) -nt $(get_saslpasswd).db ]; then echo -e "\a$(get_saslpasswd).db is older than $(get_saslpasswd)!" echo "Run the following command as root to sync $(get_saslpasswd).db:" echo; echo -e "\tpostmap `postconf -h smtp_sasl_password_maps`"; echo exit 65 else echo "$(get_saslpasswd).db is up to date." fi else echo; echo -e "\aThere is no $(get_saslpasswd).db!" exit 78 fi elif ! [ -e $(get_saslpasswd) ]; then echo; echo -e "\aYou have set smtp_sasl_password_maps = ${saslpasswd}" echo "in main.cf, but $(get_saslpasswd) does not seem to be there." echo "Please check and run ${scriptname} again." exit 78 fi } function get_smtp_dialogue_wrapper () { local host="" if [ -r $(get_saslpasswd) ]; then for host in $(awk '!/^#/ {print $1}' ${saslpasswd}); do get_smtp_dialogue ${host}; echo done elif ! [ -r $(get_saslpasswd) ]; then echo -e "\aYou don't have the correct permissions to read $(get_saslpasswd)." echo "The telnet test, which gets the AUTH mechanisms offered by your remote" echo "MTA(s), requires reading this file. Become either root to access" echo "$(get_saslpasswd), or allow your current user, ${USER}, to read it."; echo exit 0 fi } function server () { mode="server-side" start; echo get_mail_version; echo get_sasl_support smtpd; echo get_maincf smtpd; echo get_sasl_dirs; echo list_sasl_dirs; echo get_sasl_apps; echo get_service_config; echo list_service_configs; echo get_mastercf; echo get_smtp_dialogue localhost; echo end; echo exit 0 } function client () { mode="client-side" start; echo get_mail_version; echo get_sasl_support smtp; echo get_maincf smtp; echo get_sasl_dirs; echo list_sasl_dirs; echo check_saslpasswd; echo get_mastercf; echo get_smtp_dialogue_wrapper; echo end; echo exit 0 } function usage () { echo; echo "saslfinger -s"; echo -e "\tCheck server-side SMTP AUTH configuration" echo; echo "saslfinger -c"; echo -e "\tCheck client-side SMTP AUTH configuration" echo; echo "saslfinger -h"; echo -e "\tPrint this message." echo; echo "Read man (1) saslfinger for a detailed discussion on what"; echo "${scriptname} may do for you." echo; exit 0 } no_args=0 if [ ${#} -eq ${no_args} ]; then echo; echo -e "\aUsage: `basename ${0}` [-chs]" echo "Use \"`basename ${0}` -h\" to find out what the options mean." echo; exit 65 fi while getopts "chs" option; do case ${option} in c ) client;; s ) server;; h ) usage;; esac done shift $(($OPTIND - 1)) exit 0