126 lines
2.9 KiB
Bash
126 lines
2.9 KiB
Bash
|
#!/usr/bin/env bash
|
||
|
|
|
||
|
|
# Fake POP3 server
|
||
|
|
# By Marcus Bointon <phpmailer@synchromedia.co.uk>
|
||
|
|
# Based on code by 'Frater' found at http://www.linuxquestions.org/questions/programming-9/fake-pop3-server-to-capture-pop3-passwords-933733
|
||
|
|
# Does not actually serve any mail, but supports commands sufficient to test POP-before SMTP
|
||
|
|
# Can be run directly from a shell like this:
|
||
|
|
# mkfifo fifo; nc -l 1100 <fifo |./fakepopserver.sh >fifo; rm fifo
|
||
|
|
# It will accept any user name and will return a positive response for the password 'test'
|
||
|
|
|
||
|
|
# Licensed under the GNU Lesser General Public License: http://www.gnu.org/copyleft/lesser.html
|
||
|
|
|
||
|
|
# Enable debug output
|
||
|
|
#set -xv
|
||
|
|
export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
|
||
|
|
|
||
|
|
LOGFOLDER=/tmp
|
||
|
|
|
||
|
|
LOGFILE=${LOGFOLDER}/fakepop.log
|
||
|
|
|
||
|
|
LOGGING=1
|
||
|
|
DEBUG=1
|
||
|
|
TIMEOUT=60
|
||
|
|
|
||
|
|
POP_USER=
|
||
|
|
POP_PASSWRD=test
|
||
|
|
|
||
|
|
LINES=1
|
||
|
|
BREAK=0
|
||
|
|
|
||
|
|
write_log () {
|
||
|
|
if [ ${LINES} -eq 1 ] ; then
|
||
|
|
echo '---' >>${LOGFILE}
|
||
|
|
fi
|
||
|
|
let LINES+=1
|
||
|
|
[ ${LOGGING} = 0 ] || echo -e "`date '+%b %d %H:%M'` pop3 $*" >>${LOGFILE}
|
||
|
|
}
|
||
|
|
|
||
|
|
ANSWER="+OK Fake POP3 Service Ready"
|
||
|
|
|
||
|
|
while [ ${BREAK} -eq 0 ] ; do
|
||
|
|
echo -en "${ANSWER}\r\n"
|
||
|
|
|
||
|
|
REPLY=""
|
||
|
|
|
||
|
|
#Input appears in $REPLY
|
||
|
|
read -t ${TIMEOUT}
|
||
|
|
|
||
|
|
ANSWER="+OK "
|
||
|
|
COMMAND=""
|
||
|
|
ARGS=""
|
||
|
|
TIMEOUT=30
|
||
|
|
|
||
|
|
if [ "$REPLY" ] ; then
|
||
|
|
write_log "RAW input: '`echo "${REPLY}" | tr -cd '[ -~]'`'"
|
||
|
|
|
||
|
|
COMMAND="`echo "${REPLY}" | awk '{print $1}' | tr -cd '\40-\176' | tr 'a-z' 'A-Z'`"
|
||
|
|
ARGS="`echo "${REPLY}" | tr -cd '\40-\176' | awk '{for(i=2;i<=NF;i++){printf "%s ", $i};printf "\n"}' | sed 's/ $//'`"
|
||
|
|
|
||
|
|
write_log "Command: \"${COMMAND}\""
|
||
|
|
write_log "Arguments: \"${ARGS}\""
|
||
|
|
|
||
|
|
case "$COMMAND" in
|
||
|
|
QUIT)
|
||
|
|
break
|
||
|
|
;;
|
||
|
|
USER)
|
||
|
|
if [ -n "${ARGS}" ] ; then
|
||
|
|
POP_USER="${ARGS}"
|
||
|
|
ANSWER="+OK Please send PASS command"
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
AUTH)
|
||
|
|
ANSWER="+OK \r\n."
|
||
|
|
;;
|
||
|
|
CAPA)
|
||
|
|
ANSWER="+OK Capabilities include\r\nUSER\r\nCAPA\r\n."
|
||
|
|
;;
|
||
|
|
PASS)
|
||
|
|
if [ "${POP_PASSWRD}" == "${ARGS}" ] ; then
|
||
|
|
ANSWER="+OK Logged in."
|
||
|
|
AUTH=1
|
||
|
|
else
|
||
|
|
ANSWER="-ERR Login failed."
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
LIST)
|
||
|
|
if [ "${AUTH}" = 0 ] ; then
|
||
|
|
ANSWER="-ERR Not authenticated"
|
||
|
|
else
|
||
|
|
if [ -z "${ARGS}" ] ; then
|
||
|
|
ANSWER="+OK No messages, really\r\n."
|
||
|
|
else
|
||
|
|
ANSWER="-ERR No messages, no list, no status"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
RSET)
|
||
|
|
ANSWER="+OK Resetting or whatever\r\n."
|
||
|
|
;;
|
||
|
|
LAST)
|
||
|
|
if [ "${AUTH}" = 0 ] ; then
|
||
|
|
ANSWER="-ERR Not authenticated"
|
||
|
|
else
|
||
|
|
ANSWER="+OK 0"
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
STAT)
|
||
|
|
if [ "${AUTH}" = 0 ] ; then
|
||
|
|
ANSWER="-ERR Not authenticated"
|
||
|
|
else
|
||
|
|
ANSWER="+OK 0 0"
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
NOOP)
|
||
|
|
ANSWER="+OK Hang on, doing nothing"
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
else
|
||
|
|
echo "+OK Connection timed out"
|
||
|
|
break
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
echo "+OK Bye!\r\n"
|