#!/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_extra7133="7.133"
CHECK_TITLE_extra7133="[extra7133] Check if RDS instances have multi-AZ enabled"
CHECK_SCORED_extra7133="NOT_SCORED"
CHECK_CIS_LEVEL_extra7133="EXTRA"
CHECK_SEVERITY_extra7133="Medium"
CHECK_ASFF_RESOURCE_TYPE_extra7133="AwsRdsDbInstance"
CHECK_ALTERNATE_check7133="extra7133"
CHECK_SERVICENAME_extra7133="rds"
CHECK_RISK_extra7133='In case of failure; with a single-AZ deployment configuration; should an availability zone specific database failure occur; Amazon RDS can not automatically fail over to the standby availability zone.'
CHECK_REMEDIATION_extra7133='Enable multi-AZ deployment for production databases.'
CHECK_DOC_extra7133='https://aws.amazon.com/rds/features/multi-az/'
CHECK_CAF_EPIC_extra7133='Data Protection'

extra7133(){
  for regx in $REGIONS; do
    RDS_INSTANCES=$($AWSCLI rds describe-db-instances $PROFILE_OPT --region $regx --query "DBInstances[?Engine != 'docdb'].DBInstanceIdentifier" --output text 2>&1)
    if [[ $(echo "$RDS_INSTANCES" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
        textInfo "$regx: Access Denied trying to describe DB instances" "$regx"
        continue
    fi
    if [[ $RDS_INSTANCES ]];then
      for rdsinstance in ${RDS_INSTANCES}; do
          RDS_NAME="$rdsinstance"
          MULTIAZ_FLAG=$($AWSCLI rds describe-db-instances $PROFILE_OPT --region $regx --db-instance-identifier $rdsinstance --query 'DBInstances[*].MultiAZ' --output text)
          if [[ $MULTIAZ_FLAG == "True" ]];then
              textPass "$regx: RDS instance: $RDS_NAME has multi-AZ enabled" "$regx" "$RDS_NAME"
          else
              textFail "$regx: RDS instance: $RDS_NAME has multi-AZ disabled!" "$regx" "$RDS_NAME"
          fi
      done
    else
      textInfo "$regx: no RDS instances found" "$regx" "$RDS_NAME"
    fi
  done
}
