CHECK_ID_extra73="7.3,7.03"
CHECK_TITLE_extra73="Ensure there are no S3 buckets open to the Everyone or Any AWS user (Not Scored) (Not part of CIS benchmark)"
CHECK_SCORED_extra73="NOT_SCORED"
CHECK_ALTERNATE_extra703="extra73"
CHECK_ALTERNATE_check73="extra73"
CHECK_ALTERNATE_check703="extra73"

extra73(){
  textInfo "Looking for open S3 Buckets (ACLs and Policies) in all regions...  "
  ALL_BUCKETS_LIST=$($AWSCLI s3api list-buckets --query 'Buckets[*].{Name:Name}' --profile $PROFILE --region $REGION --output text)
  for bucket in $ALL_BUCKETS_LIST; do
    extra73Thread $bucket &
  done
  wait
}
extra73Thread(){
  bucket=$1
  BUCKET_LOCATION=$($AWSCLI s3api get-bucket-location --bucket $bucket --profile $PROFILE --region $REGION --output text)
  if [[ "None" == $BUCKET_LOCATION ]]; then
    BUCKET_LOCATION="us-east-1"
  fi
  if [[ "EU" == $BUCKET_LOCATION ]]; then
    BUCKET_LOCATION="eu-west-1"
  fi
  # check if AllUsers is in the ACL as Grantee
  CHECK_BUCKET_ALLUSERS_ACL=$($AWSCLI s3api get-bucket-acl --profile $PROFILE --region $BUCKET_LOCATION --bucket $bucket --query "Grants[?Grantee.URI == 'http://acs.amazonaws.com/groups/global/AllUsers']" --output text |grep -v GRANTEE)
  CHECK_BUCKET_ALLUSERS_ACL_SINGLE_LINE=$(echo -ne $CHECK_BUCKET_ALLUSERS_ACL)
  # check if AuthenticatedUsers is in the ACL as Grantee, they will have access with sigened URL only
  CHECK_BUCKET_AUTHUSERS_ACL=$($AWSCLI s3api get-bucket-acl --profile $PROFILE --region $BUCKET_LOCATION --bucket $bucket --query "Grants[?Grantee.URI == 'http://acs.amazonaws.com/groups/global/AuthenticatedUsers']" --output text |grep -v GRANTEE)
  CHECK_BUCKET_AUTHUSERS_ACL_SINGLE_LINE=$(echo -ne $CHECK_BUCKET_AUTHUSERS_ACL)
  # to prevent error NoSuchBucketPolicy first clean the output controlling stderr
  TEMP_POLICY_FILE=$(mktemp -t prowler-${ACCOUNT_NUM}-${bucket}.policy.XXXXXXXXXX)
  $AWSCLI s3api get-bucket-policy --profile $PROFILE --region $BUCKET_LOCATION --bucket $bucket --output text --query Policy > $TEMP_POLICY_FILE 2> /dev/null
  # check if the S3 policy has Principal as *
  CHECK_BUCKET_ALLUSERS_POLICY=$(cat $TEMP_POLICY_FILE | sed -e 's/[{}]/''/g' | awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}'|awk '/Principal/ && !skip { print } { skip = /Deny/} '|grep ^\"Principal|grep \*)
  if [[ $CHECK_BUCKET_ALLUSERS_ACL || $CHECK_BUCKET_AUTHUSERS_ACL || $CHECK_BUCKET_ALLUSERS_POLICY ]];then
    if [[ $CHECK_BUCKET_ALLUSERS_ACL ]];then
      textFail "$BUCKET_LOCATION: $bucket bucket is open to the Internet (Everyone) with permissions: $CHECK_BUCKET_ALLUSERS_ACL_SINGLE_LINE" "$regx"
    fi
    if [[ $CHECK_BUCKET_AUTHUSERS_ACL ]];then
      textFail "$BUCKET_LOCATION: $bucket bucket is open to Authenticated users (Any AWS user) with permissions: $CHECK_BUCKET_AUTHUSERS_ACL_SINGLE_LINE" "$regx"
    fi
    if [[ $CHECK_BUCKET_ALLUSERS_POLICY ]];then
      textFail "$BUCKET_LOCATION: $bucket bucket policy \"may\" allow Anonymous users to perform actions (Principal: \"*\")" "$regx"
    fi
  else
    textPass "$BUCKET_LOCATION: $bucket bucket is not open" "$regx"
  fi
  rm -fr $TEMP_POLICY_FILE
}