From 349a67bee60aea8a6e6a1bb924b13d7e7b954a9b Mon Sep 17 00:00:00 2001
From: Krzysztof Kotlarek <kotlarek.krzysztof@gmail.com>
Date: Wed, 27 May 2020 08:13:47 +1000
Subject: [PATCH] FEATURE: notify admins about old credentials (#9854)

* FEATURE: notify admins about old credentials

Security and API keys should be renewed periodically.
This additional notification should help admins keep their Discourse safe and secure.
---
 app/jobs/scheduled/old_keys_reminder.rb | 62 +++++++++++++++++++++++++
 config/locales/server.en.yml            | 10 ++++
 config/site_settings.yml                |  8 ++++
 spec/jobs/old_keys_reminder_spec.rb     | 55 ++++++++++++++++++++++
 4 files changed, 135 insertions(+)
 create mode 100644 app/jobs/scheduled/old_keys_reminder.rb
 create mode 100644 spec/jobs/old_keys_reminder_spec.rb

diff --git a/app/jobs/scheduled/old_keys_reminder.rb b/app/jobs/scheduled/old_keys_reminder.rb
new file mode 100644
index 00000000000..4355a043661
--- /dev/null
+++ b/app/jobs/scheduled/old_keys_reminder.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+module Jobs
+  class OldKeysReminder < ::Jobs::Scheduled
+    every 1.month
+
+    def execute(_args)
+      return if SiteSetting.notify_about_secrets_older_than == 'never'
+      return if old_site_settings_keys.blank? && old_api_keys.blank?
+      admins.each do |admin|
+        PostCreator.create!(
+          Discourse.system_user,
+          title: title,
+          raw: body,
+          archetype: Archetype.private_message,
+          target_usernames: admin.username,
+          validate: false
+        )
+      end
+    end
+
+    private
+
+    def old_site_settings_keys
+      @old_site_settings_keys ||= SiteSetting.secret_settings.each_with_object([]) do |secret_name, old_keys|
+        site_setting = SiteSetting.find_by(name: secret_name)
+        next if site_setting&.value.blank?
+        next if site_setting.updated_at + calculate_period > Time.zone.now
+        old_keys << site_setting
+      end.sort_by { |key| key.updated_at }
+    end
+
+    def old_api_keys
+      @old_api_keys ||= ApiKey.all.order(created_at: :asc).each_with_object([]) do |api_key, old_keys|
+        next if api_key.created_at + calculate_period > Time.zone.now
+        old_keys << api_key
+      end
+    end
+
+    def calculate_period
+      SiteSetting.notify_about_secrets_older_than.to_i.years
+    end
+
+    def admins
+      User.real.admins
+    end
+
+    def title
+      I18n.t('old_keys_reminder.title', keys_count: old_site_settings_keys.count + old_api_keys.count)
+    end
+
+    def body
+      I18n.t('old_keys_reminder.body', keys: keys_list)
+    end
+
+    def keys_list
+      messages = old_site_settings_keys.map { |key| "#{key.name} - #{key.updated_at}" }
+      old_api_keys.each_with_object(messages) { |key, array| array << "#{[key.description, key.user&.username, key.created_at].compact.join(" - ")}" }
+      messages.join("\n")
+    end
+  end
+end
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 0433fd08b58..e9918e2f494 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -1583,6 +1583,7 @@ en:
     moderators_view_emails: "Allow moderators to view user emails"
     prioritize_username_in_ux: "Show username first on user page, user card and posts (when disabled name is shown first)"
     enable_rich_text_paste: "Enable automatic HTML to Markdown conversion when pasting text into the composer. (Experimental)"
+    notify_about_secrets_older_than: "Notify about credentials older than"
 
     email_token_valid_hours: "Forgot password / activate account tokens are valid for (n) hours."
 
@@ -4817,3 +4818,12 @@ en:
 
   discord:
     not_in_allowed_guild: "Authentication failed. You are not a member of a permitted Discord guild."
+
+  old_keys_reminder:
+    title: "You have %{keys_count} old credentials"
+    body: |
+      We have detected you have the following credentials that are 2 years or older
+
+      %{keys}
+
+      These credentials are sensitive and we recommend resetting them every 2 years to avoid impact of any future data breaches
diff --git a/config/site_settings.yml b/config/site_settings.yml
index cfeb71108e7..265a9977a55 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -1458,6 +1458,14 @@ security:
   allow_embedding_site_in_an_iframe:
     default: false
     hidden: true
+  notify_about_secrets_older_than:
+    default: "2 years"
+    type: enum
+    choices:
+      - never
+      - "1 year"
+      - "2 years"
+      - "3 years"
 
 onebox:
   enable_flash_video_onebox: false
diff --git a/spec/jobs/old_keys_reminder_spec.rb b/spec/jobs/old_keys_reminder_spec.rb
new file mode 100644
index 00000000000..850aea2cd63
--- /dev/null
+++ b/spec/jobs/old_keys_reminder_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe Jobs::OldKeysReminder do
+  let!(:google_secret) { SiteSetting.create!(name: 'google_oauth2_client_secret', value: '123', data_type: 1) }
+  let!(:instagram_secret) { SiteSetting.create!(name: 'instagram_consumer_secret', value: '123', data_type: 1) }
+  let!(:api_key) { Fabricate(:api_key, description: 'api key description') }
+  let!(:admin) { Fabricate(:admin) }
+
+  let!(:recent_twitter_secret) { SiteSetting.create!(name: 'twitter_consumer_secret', value: '123', data_type: 1, updated_at: 2.years.from_now) }
+  let!(:recent_api_key) { Fabricate(:api_key, description: 'recent api key description', created_at: 2.years.from_now) }
+
+  it 'sends message to admin with old credentials' do
+    freeze_time 2.years.from_now
+    expect { described_class.new.execute({}) }.to change { Post.count }.by(1)
+    post = Post.last
+    expect(post.archetype).to eq(Archetype.private_message)
+    expect(post.topic.topic_allowed_users.map(&:user_id).sort).to eq([Discourse.system_user.id, admin.id].sort)
+    expect(post.topic.title).to eq("You have 3 old credentials")
+    expect(post.raw).to eq(<<-MSG.rstrip)
+We have detected you have the following credentials that are 2 years or older
+
+google_oauth2_client_secret - #{google_secret.updated_at}
+instagram_consumer_secret - #{instagram_secret.updated_at}
+api key description - #{api_key.created_at}
+
+These credentials are sensitive and we recommend resetting them every 2 years to avoid impact of any future data breaches
+    MSG
+
+    freeze_time 4.years.from_now
+    described_class.new.execute({})
+    post = Post.last
+    expect(post.topic.title).to eq("You have 5 old credentials")
+    expect(post.raw).to eq(<<-MSG.rstrip)
+We have detected you have the following credentials that are 2 years or older
+
+google_oauth2_client_secret - #{google_secret.updated_at}
+instagram_consumer_secret - #{instagram_secret.updated_at}
+twitter_consumer_secret - #{recent_twitter_secret.updated_at}
+api key description - #{api_key.created_at}
+recent api key description - #{recent_api_key.created_at}
+
+These credentials are sensitive and we recommend resetting them every 2 years to avoid impact of any future data breaches
+    MSG
+  end
+
+  it 'does not send message when notification set to never or no old keys' do
+    SiteSetting.notify_about_secrets_older_than = "never"
+    freeze_time 2.years.from_now
+    expect { described_class.new.execute({}) }.to change { Post.count }.by(0)
+    SiteSetting.notify_about_secrets_older_than = "3 years"
+    expect { described_class.new.execute({}) }.to change { Post.count }.by(0)
+  end
+end