#!/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_extra7161="7.161"
CHECK_TITLE_extra7161="[extra7161] Check if EFS protects sensitive data with encryption at rest"
CHECK_SCORED_extra7161="NOT_SCORED"
CHECK_CIS_LEVEL_extra7161="EXTRA"
CHECK_SEVERITY_extra7161="Medium"
CHECK_ASFF_RESOURCE_TYPE_extra7161="AwsEfsFileSystem"
CHECK_ALTERNATE_check7161="extra7161"
CHECK_SERVICENAME_extra7161="efs"
CHECK_RISK_extra7161='EFS should be encrypted at rest to prevent exposure of sensitive data to bad actors'
CHECK_REMEDIATION_extra7161='Ensure that encryption at rest is enabled for EFS file systems. Encryption at rest can only be enabled during the file system creation.'
CHECK_DOC_extra7161='https://docs.aws.amazon.com/efs/latest/ug/encryption-at-rest.html'
CHECK_CAF_EPIC_extra7161='Data Protection'

extra7161(){
  # "Check if EFS has encryption at rest enabled (Not Scored) (Proposed requirement for 1.5 CIS benchmark)"
  for regx in $REGIONS; do
  LIST_OF_EFS_IDS=$($AWSCLI efs describe-file-systems $PROFILE_OPT --region $regx --query 'FileSystems[*].FileSystemId' --output text 2>&1| xargs -n1 )
  if [[ $(echo "$LIST_OF_EFS_IDS" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
      textInfo "$regx: Access Denied trying to describe file systems" "$regx"
      continue
  fi
  if [[ $LIST_OF_EFS_IDS ]]; then
    for efsId in $LIST_OF_EFS_IDS;do
      EFS_ENCRYPTION_CHECK=$($AWSCLI efs $PROFILE_OPT describe-file-systems --region $regx --file-system-id $efsId --output json --query 'FileSystems[*].Encrypted' --output text)
      if [[ $EFS_ENCRYPTION_CHECK == "True" ]]; then
        textPass "$regx: EFS $efsId has has encryption at rest enabled" "$regx" "$efsId"
      else
        textFail "$regx:  EFS: $efsId does not have encryption at rest enabled" "$regx" "$efsId"
      fi
    done
  else
    textInfo "$regx: No EFS found" "$regx"
  fi
 done
}