#!/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.


# Get whoami in AWS, who is the user running this shell script
# Get a list of all available AWS Regions
# sice describe-regions doesn't seem to work at me-south-1|eu-south-1|ap-east-1|af-south-1.
# Probably dased on https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_temp_enable-regions.html
# when invoking regions with -r, those regions with STS disabled make GETCALLER fail then
# this if will filter them out (Africa (Cape Town), Asia Pacific (Hong Kong), Europe (Milan) and Middle East (Bahrain) ):


case "$REGION" in
  me-south-1|eu-south-1|ap-east-1|af-south-1)
    REGION_FOR_STS="us-east-1"
  ;;
  *)
    REGION_FOR_STS=$REGION
  ;;
esac

GETCALLER=$($AWSCLI sts get-caller-identity $PROFILE_OPT --region $REGION_FOR_STS 2>&1)
if [[ $(echo "$GETCALLER" | grep 'Unable') ]]; then
  if [[ $PRINTCHECKSONLY || $PRINTGROUPSONLY ]]; then
    echo Listing... 
  else
    # Failed to get own identity ... exit
    echo -e "$RED ERROR Getting credentials to run Prowler - EXITING! $NORMAL"
    EXITCODE=2
    exit $EXITCODE
  fi
fi 

if [[ $ACCOUNT_TO_ASSUME ]]; then
  ACCOUNT_NUM=$ACCOUNT_TO_ASSUME
else
  ACCOUNT_NUM=$(echo $GETCALLER | jq -r '.Account' 2>&1)
fi

CALLER_ARN=$(echo $GETCALLER | jq -r '.Arn' 2>&1)
USER_ID=$(echo $GETCALLER | jq -r '.UserId' 2>&1)
AWS_PARTITION=$(echo $CALLER_ARN| cut -d: -f2)

getWhoami(){

  if [[ "$MODE" == "csv" ]]; then
    if [[ 255 -eq $? ]]; then
      # Failed to get own identity ... exit
      echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
      >&2 echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
      EXITCODE=2
      exit $EXITCODE
    fi
    printCsvHeader
    # textTitle "0.0" "Show report generation info" "NOT_SCORED" "SUPPORT"
    # textInfo "ARN: $CALLER_ARN  TIMESTAMP: $SCRIPT_START_TIME"
  elif [[ "$MODE" == "json" || "$MODE" == "json-asff" ]]; then
    :
  else
    echo ""
    echo -e " This report is being generated using credentials below:\n"
    echo -e " AWS-CLI Profile: $NOTICE[$PROFILE]$NORMAL AWS API Region: $NOTICE[$REGION]$NORMAL AWS Filter Region: $NOTICE[${FILTERREGION:-all}]$NORMAL"
    if [[ $MONOCHROME -eq 1 ]]; then
      echo -e " AWS Account: $NOTICE[$ACCOUNT_NUM]$NORMAL UserId: $NOTICE[$USER_ID]$NORMAL"
      echo -e " Caller Identity ARN: $NOTICE[$CALLER_ARN]$NORMAL"
      if [[ 255 -eq $? ]]; then
        # Failed to get own identity ... exit
        echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
        >&2 echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
        exit 2
      fi
    else
      echo -e " AWS Account: $NOTICE[$ACCOUNT_NUM]$NORMAL UserId: $NOTICE[$USER_ID]$NORMAL"
      echo -e " Caller Identity ARN: $NOTICE[$CALLER_ARN]$NORMAL"
      if [[ 255 -eq $? ]]; then
        # Failed to get own identity ... exit
        echo variable $PROFILE_OPT
        echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
        >&2 echo "ERROR WITH $PROFILE CREDENTIALS - EXITING!"
        EXITCODE=2
        exit $EXITCODE
      fi
      echo ""
    fi
  fi
}