#!/usr/bin/env bash

# Prowler - the handy cloud security tool (copyright 2018) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
CHECK_ID_extra79="7.9"
CHECK_TITLE_extra79="[extra79] Check for internet facing Elastic Load Balancers"
CHECK_SCORED_extra79="NOT_SCORED"
CHECK_TYPE_extra79="EXTRA"
CHECK_SEVERITY_extra79="Medium"
CHECK_ASFF_RESOURCE_TYPE_extra79="AwsElbLoadBalancer"
CHECK_ALTERNATE_extra709="extra79"
CHECK_ALTERNATE_check79="extra79"
CHECK_ALTERNATE_check709="extra79"
CHECK_SERVICENAME_extra79="elb"
CHECK_RISK_extra79='Publicly accessible load balancers could expose sensible data to bad actors.'
CHECK_REMEDIATION_extra79='Ensure the load balancer should be publicly accessible. If publiccly exposed ensure a WAF ACL is implemented.'
CHECK_DOC_extra79='https://docs.aws.amazon.com/waf/latest/developerguide/web-acl-associating-aws-resource.html'
CHECK_CAF_EPIC_extra79='Data Protection'

extra79(){
  # "Check for internet facing Elastic Load Balancers "
  for regx in $REGIONS; do
    LIST_OF_PUBLIC_ELBS=$($AWSCLI elb describe-load-balancers $PROFILE_OPT --region $regx --query 'LoadBalancerDescriptions[?Scheme == `internet-facing`].[LoadBalancerName,DNSName]' --output text)
    LIST_OF_PUBLIC_ELBSV2=$($AWSCLI elbv2 describe-load-balancers $PROFILE_OPT --region $regx --query 'LoadBalancers[?Scheme == `internet-facing`].[LoadBalancerName,DNSName]' --output text)
    LIST_OF_ALL_ELBS=$( echo $LIST_OF_PUBLIC_ELBS; echo $LIST_OF_PUBLIC_ELBSV2)
    LIST_OF_ALL_ELBS_PER_LINE=$( echo $LIST_OF_ALL_ELBS| xargs -n2 )
    if [[ $LIST_OF_ALL_ELBS ]];then
      while read -r elb;do
        ELB_NAME=$(echo $elb | awk '{ print $1; }')
        ELB_DNSNAME=$(echo $elb | awk '{ print $2; }')
        textFail "$regx: ELB: $ELB_NAME at DNS: $ELB_DNSNAME is internet-facing!" "$regx" "$ELB_NAME"
      done <<< "$LIST_OF_ALL_ELBS_PER_LINE"
      else
        textPass "$regx: no Internet Facing ELBs found" "$regx" "$ELB_NAME"
    fi
  done
}