# Copyright 2019 The inspec-gcp-cis-benchmark Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
#     https://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.
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title 'Ensure API Keys Are Rotated Every 90 Days'

gcp_project_id = input('gcp_project_id')
cis_version = input('cis_version')
cis_url = input('cis_url')
control_id = '1.15'
control_abbrev = 'iam'

control "cis-gcp-#{control_id}-#{control_abbrev}" do
  impact 'medium'

  title "[#{control_abbrev.upcase}] Ensure API keys are rotated every 90 days"

  desc 'API Keys should only be used for services in cases where other authentication methods are unavailable. If they are in use it is recommended to rotate API keys every 90 days.'
  desc 'rationale', "Security risks involved in using API-Keys are listed below:
  - API keys are simple encrypted strings
  - API keys do not identify the user or the application making the API request
  - API keys are typically accessible to clients, making it easy to discover and steal an API key

  Because of these potential risks, Google recommends using the standard authentication flow instead of API Keys. However, there are limited cases where API keys are more appropriate. For example, if there is a mobile application that needs to use the Google Cloud Translation API, but doesn't otherwise need a backend server, API keys are the simplest way to authenticate to that API.

  Once a key is stolen, it has no expiration, meaning it may be used indefinitely unless the project owner revokes or regenerates the key. Rotating API keys will reduce the window of opportunity for an access key that is associated with a compromised or terminated account to be used.

  API keys should be rotated to ensure that data cannot be accessed with an old key that might have been lost, cracked, or stolen."

  tag cis_scored: false
  tag cis_level: 2
  tag cis_gcp: control_id.to_s
  tag cis_version: cis_version.to_s
  tag project: gcp_project_id.to_s
  tag nist: ['AC-2']

  ref 'CIS Benchmark', url: cis_url.to_s

  describe 'This control is not scored' do
    skip 'This control is not scored'
  end
end
