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