#!/usr/bin/env bash

# Prowler - the handy cloud security tool (c) by Toni de la Fuente
#
# This Prowler check is licensed under a
# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
#
# You should have received a copy of the license along with this
# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.

CHECK_ID_check29="2.9"
CHECK_TITLE_check29="[check29] Ensure VPC Flow Logging is Enabled in all VPCs (Scored)"
CHECK_SCORED_check29="SCORED"
CHECK_TYPE_check29="LEVEL2"
CHECK_SEVERITY_check29="Medium"
CHECK_ASFF_TYPE_check29="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
CHECK_ASFF_RESOURCE_TYPE_check29="AwsEc2Vpc"
CHECK_ALTERNATE_check209="check29"
CHECK_ASFF_COMPLIANCE_TYPE_check29="ens-op.mon.1.aws.flow.1"
CHECK_SERVICENAME_check29="vpc"

check29(){
  # "Ensure VPC Flow Logging is Enabled in all VPCs (Scored)"
  for regx in $REGIONS; do
    AVAILABLE_VPC=$($AWSCLI ec2 describe-vpcs $PROFILE_OPT --region $regx --query 'Vpcs[?State==`available`].VpcId' --output text 2>&1)
    if [[ $(echo "$AVAILABLE_VPC" | grep AccessDenied) ]]; then
      textFail "$regx: Access Denied trying to describe VPCs"
      continue
    fi
    for vpcx in $AVAILABLE_VPC; do
      CHECK_FL=$($AWSCLI ec2 describe-flow-logs $PROFILE_OPT --region $regx --filter Name="resource-id",Values="${vpcx}" --query 'FlowLogs[?FlowLogStatus==`ACTIVE`].FlowLogId' --output text 2>&1)
      if [[ $(echo "$CHECK_FL" | grep AccessDenied) ]]; then
        textFail "$regx: VPC $vpcx Access Denied trying to describe flow logs"
        continue
      fi
      if [[ $CHECK_FL ]]; then
        for FL in $CHECK_FL; do
          textPass "$regx: VPC $vpcx VPCFlowLog is enabled for LogGroupName: $FL"
        done
      else
        textFail "$regx: VPC $vpcx VPCFlowLog is disabled"
      fi
    done
  done
}