Delete Saved Card

#!/usr/bin/env bash

generate_hash_key() {
  local merchant_key="$1"
  local customer_number="$2"
  local card_token="$3"
  local app_secret="$4"

  local data="${merchant_key}|${customer_number}|${card_token}"

  local iv
  iv=$(openssl rand -hex 16 | openssl sha1 | awk '{print $2}' | cut -c1-16)

  local password
  password=$(printf "%s" "$app_secret" | openssl sha1 | awk '{print $2}')

  local salt
  salt=$(openssl rand -hex 16 | openssl sha1 | awk '{print $2}' | cut -c1-4)

  local salt_with_password
  salt_with_password=$(printf "%s" "${password}${salt}" | openssl sha256 | awk '{print $2}' | cut -c1-32)

  local key_hex
  key_hex=$(printf "%s" "$salt_with_password" | xxd -p -c 256)

  local iv_hex
  iv_hex=$(printf "%s" "$iv" | xxd -p -c 256)

  local encrypted_base64
  encrypted_base64=$(printf "%s" "$data" | openssl enc -aes-256-cbc -K "$key_hex" -iv "$iv_hex" -base64)

  local result="${iv}:${salt}:${encrypted_base64}"
  result="${result//\//__}"

  echo "$result"
}

echo "$(generate_hash_key "123456789" "CUST001" "card_abc123xyz" "mySecretKey123")"