#!/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_check119="1.19"
CHECK_TITLE_check119="[check119] Ensure IAM instance roles are used for AWS resource access from instances (Not Scored)"
CHECK_SCORED_check119="NOT_SCORED"
CHECK_TYPE_check119="LEVEL2"
CHECK_ASFF_TYPE_check119="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
CHECK_ASFF_RESOURCE_TYPE_check119="AwsEc2Instance"
CHECK_ALTERNATE_check119="check119"

check119(){
  for regx in $REGIONS; do
    EC2_DATA=$($AWSCLI ec2 describe-instances $PROFILE_OPT --region $regx --query 'Reservations[].Instances[].[InstanceId, IamInstanceProfile.Arn, State.Name]' --output json)
    EC2_DATA=$(echo $EC2_DATA | jq '.[]|{InstanceId: .[0], ProfileArn: .[1], StateName: .[2]}')
    INSTANCE_LIST=$(echo $EC2_DATA | jq -r '.InstanceId')
    if [[ $INSTANCE_LIST ]]; then
      for instance in $INSTANCE_LIST; do
        STATE_NAME=$(echo $EC2_DATA | jq -r --arg i "$instance" 'select(.InstanceId==$i)|.StateName')
        if [[ $STATE_NAME != "terminated" ]]; then
          PROFILEARN=$(echo $EC2_DATA | jq -r --arg i "$instance" 'select(.InstanceId==$i)|.ProfileArn')
          if [[ $PROFILEARN == "null" ]]; then
            textFail "$regx: Instance $instance not associated with an instance role" $regx
          else
            textPass "$regx: Instance $instance associated with role ${PROFILEARN##*/}" $regx
          fi
        fi
      done
    else
      textInfo "$regx: No EC2 instances found" $regx
    fi
  done
}