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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare

Cokiee Shell

Current Path : /proc/self/root/usr/lib/

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Current File : //proc/self/root/usr/lib/sendmail

#!/bin/bash
######################################################################
# hosttech sendmail wrapper to controll flood attack #################
# SG: merged confixx and plesk to one generic wrapper ################
# SG: ignore system users for limiting ###############################
######################################################################
# v1.0
######################################################################

# settings
sMailCountPath="/tmp/mailcount/"
sLimitsFilePath="/etc/sendmail/limits"
iTimeLimit=86400
iCountLimit=1000
RegexOnlyNumbers='^[0-9]+$'

# get vars
sUser=$(/usr/bin/whoami)
sUserStringLength=${#sUser}
iNow=$(date +"%s")
iCount=1
sNewFile=""
bExit=false
sServer=`hostname`

# declare user limits
iUserTimeLimit=""
iUserCountLimit=""

# do not limit system users
# confixx = confixx webmail
# majordomo = confixx mailing lists
# nobody = confixx autoresponder
# popuser = plesk user for email forwardings
# root = root user (often used for cronjobs)
if [[ $sUser == "confixx" || $sUser == "majordomo" || $sUser == "popuser" || $sUser == "root" || $sUser == "nobody" ]]; then
	# do nothing in here
	:
else
    if [ -f $sLimitsFilePath ]; then
        #default value
        sLine=`cat $sLimitsFilePath  | grep -m1 "^#default "`
        if [ "$sLine" != "" ]; then
            iDefaultTimeLimitTemp=$(echo $sLine | /usr/bin/cut -f2 -d" ")
            iDefaultCountLimitTemp=$(echo $sLine | /usr/bin/cut -f3 -d" ")
            if [[ $iDefaultTimeLimitTemp =~ $RegexOnlyNumbers ]] ; then
                if [[ $iDefaultCountLimitTemp =~ $RegexOnlyNumbers ]] ; then
                    iTimeLimit=$iDefaultTimeLimitTemp
                    iCountLimit=$iDefaultCountLimitTemp
                fi
            fi
        fi

        #user specified value
        sLine=`cat $sLimitsFilePath  | grep -m1 "^$sUser "`
        if [ "$sLine" != "" ]; then
            iUserTimeLimitTemp=$(echo $sLine | /usr/bin/cut -f2 -d" ")
            iUserCountLimitTemp=$(echo $sLine | /usr/bin/cut -f3 -d" ")
            if [[ $iUserTimeLimitTemp =~ $RegexOnlyNumbers ]] ; then
                if [[ $iUserCountLimitTemp =~ $RegexOnlyNumbers ]] ; then
                    iUserTimeLimit=$iUserTimeLimitTemp
                    iUserCountLimit=$iUserCountLimitTemp
                fi
            fi
        fi
    fi

    if [[ $iUserTimeLimit =~ $RegexOnlyNumbers ]] ; then
        if [[ $iUserCountLimit =~ $RegexOnlyNumbers ]] ; then
            iTimeLimit=$iUserTimeLimit
            iCountLimit=$iUserCountLimit
        fi
    fi

    # check if mailcount folder exists - create if not and set global rights
    if [ ! -d "$sMailCountPath" ]; then
        mkdir -m 0777 -p "$sMailCountPath"
    fi

    iPeriodBegin=$((iNow-iTimeLimit))

    # if mailcount file exists
    if [ -f $sMailCountPath$sUser ]; then

        # read lines of file
        for iTimestampLine in `cat $sMailCountPath$sUser`; do

            # count other mail send
            if [ $iTimestampLine -gt $iPeriodBegin ]; then

                # count up
                iCount=$((iCount+1))

                # save mail send into file
                if [ "$sNewFile" != "" ]; then
                    sNewFile=$sNewFile"\n"
                fi
                sNewFile=$sNewFile$iTimestampLine

            fi

        done

    fi

    # check if limit is reached
    if [ $iCount -gt $iCountLimit ]; then
        # exit with status code 1 - to let eg. php know about
        bExit=true
    fi

    # exit if limit is reached
    if [ $bExit == true ]; then
        exit 1;
    fi

    # insert own call
    if [ "$sNewFile" != "" ]; then
        sNewFile=$sNewFile"\n"
    fi
    sNewFile=$sNewFile$iNow

    # write new mailcount file
    echo -e "$sNewFile" > "$sMailCountPath$sUser"
fi

# send mails for user system users with the local / original sendmail instance
if [[ $sUser == "confixx" || $sUser == "majordomo" || $sUser == "popuser" || $sUser == "nobody" ]]; then
	/usr/sbin/sendmail_org $*
else
	### send mail as a file to the mailhost server
	#create random filename
	FILENAME=$RANDOM$RANDOM$RANDOM

	#write mail content to file
	cat /dev/stdin > /tmp/$FILENAME.tmp

	#add SERVER, FROM (if not set) information
	echo "Server: $sServer" > /tmp/$FILENAME.tmp.2
	HASFROM=`cat /tmp/$FILENAME.tmp | grep -i "From:" | /usr/bin/wc -l`
	if [ $HASFROM == 0 ]; then
		echo "From: $sUser@$sServer" >> /tmp/$FILENAME.tmp.2
	fi
	cat /tmp/$FILENAME.tmp >> /tmp/$FILENAME.tmp.2
	cat /tmp/$FILENAME.tmp.2 > /var/spool/sendmail/$FILENAME

	#log to sendmail log
	DATE=`date`
	FROM=`cat /tmp/$FILENAME.tmp.2 | grep -i "From:"`
	TO=`cat /tmp/$FILENAME.tmp.2 | grep -i "To:"`
	SUBJECT=`cat /tmp/$FILENAME.tmp.2 | grep -i "Subject:"`
	SCRIPT=$SCRIPT_FILENAME
	echo "$DATE $SCRIPT $FROM $TO $SUBJECT" >> /var/log/sendmail.log

	rm /tmp/$FILENAME.tmp
	rm /tmp/$FILENAME.tmp.2

	exit 0
fi

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