11453: Merge branch 'master' into 11453-federated-tokens
[arvados.git] / services / api / app / models / api_client_authorization.rb
index 82dd0ec2b6177847f72460b87b492950b66a605a..542ab8e88df4f4ff21bc4ed304ff151bc91a8bc1 100644 (file)
@@ -1,6 +1,12 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 class ApiClientAuthorization < ArvadosModel
+  include HasUuid
   include KindAndEtag
   include CommonApiTemplate
+  extend CurrentApiClient
 
   belongs_to :api_client
   belongs_to :user
@@ -30,23 +36,12 @@ class ApiClientAuthorization < ArvadosModel
     self.user.andand.uuid
   end
   def owner_uuid_was
-    self.user_id_changed? ? User.find(self.user_id_was).andand.uuid : self.user.andand.uuid
+    self.user_id_changed? ? User.where(id: self.user_id_was).first.andand.uuid : self.user.andand.uuid
   end
   def owner_uuid_changed?
     self.user_id_changed?
   end
 
-  def uuid
-    self.api_token
-  end
-  def uuid=(x) end
-  def uuid_was
-    self.api_token_was
-  end
-  def uuid_changed?
-    self.api_token_changed?
-  end
-
   def modified_by_client_uuid
     nil
   end
@@ -71,13 +66,124 @@ class ApiClientAuthorization < ArvadosModel
   end
 
   def scopes_allow_request?(request)
-    scopes_allow? [request.request_method, request.path].join(' ')
+    method = request.request_method
+    if method == 'HEAD'
+      (scopes_allow?(['HEAD', request.path].join(' ')) ||
+       scopes_allow?(['GET', request.path].join(' ')))
+    else
+      scopes_allow?([method, request.path].join(' '))
+    end
   end
 
   def logged_attributes
-    attrs = attributes.dup
-    attrs.delete('api_token')
-    attrs
+    super.except 'api_token'
+  end
+
+  def self.default_orders
+    ["#{table_name}.id desc"]
+  end
+
+  def self.remote_host(uuid_prefix:)
+    Rails.configuration.remote_hosts[uuid_prefix] ||
+      (Rails.configuration.remote_hosts_via_dns &&
+       uuid_prefix+".arvadosapi.com")
+  end
+
+  def self.validate(token:, remote:)
+    return nil if !token
+    remote ||= Rails.configuration.uuid_prefix
+
+    case token[0..2]
+    when 'v2/'
+      _, uuid, secret = token.split('/')
+      auth = ApiClientAuthorization.
+             includes(:user, :api_client).
+             where('uuid=? and (expires_at is null or expires_at > CURRENT_TIMESTAMP)', uuid).
+             first
+      if auth && auth.user &&
+         (secret == auth.api_token ||
+          secret == OpenSSL::HMAC.hexdigest('sha1', auth.api_token, remote))
+        return auth
+      end
+
+      uuid_prefix = uuid[0..4]
+      if uuid_prefix == Rails.configuration.uuid_prefix
+        # If the token were valid, we would have validated it above
+        return nil
+      elsif uuid_prefix.length != 5
+        # malformed
+        return nil
+      end
+
+      host = remote_host(uuid_prefix: uuid_prefix)
+      if !host
+        Rails.logger.warn "remote authentication rejected: no host for #{uuid_prefix.inspect}"
+        return nil
+      end
+
+      # Token was issued by a different cluster. If it's expired or
+      # missing in our database, ask the originating cluster to
+      # [re]validate it.
+      begin
+        clnt = HTTPClient.new
+        remote_user = SafeJSON.load(
+          clnt.get_content('https://' + host + '/arvados/v1/users/current',
+                           {'remote' => Rails.configuration.uuid_prefix},
+                           {'Authorization' => 'Bearer ' + token}))
+      rescue => e
+        Rails.logger.warn "remote authentication with token #{token.inspect} failed: #{e}"
+        return nil
+      end
+      if !remote_user.is_a?(Hash) || !remote_user['uuid'].is_a?(String) || remote_user['uuid'][0..4] != uuid[0..4]
+        Rails.logger.warn "remote authentication rejected: remote_user=#{remote_user.inspect}"
+        return nil
+      end
+      act_as_system_user do
+        # Add/update user and token in our database so we can
+        # validate subsequent requests faster.
+
+        user = User.find_or_create_by(uuid: remote_user['uuid']) do |user|
+          user.is_admin = false
+        end
+
+        updates = {}
+        [:first_name, :last_name, :email, :prefs].each do |attr|
+          updates[attr] = remote_user[attr.to_s]
+        end
+
+        if Rails.configuration.new_users_are_active
+          # Update is_active to whatever it is at the remote end
+          updates[:is_active] = remote_user['is_active']
+        elsif !updates[:is_active]
+          # Remote user is inactive; our mirror should be, too.
+          updates[:is_active] = false
+        end
+
+        user.update_attributes!(updates)
+
+        auth = ApiClientAuthorization.find_or_create_by(uuid: uuid) do |auth|
+          auth.user = user
+          auth.api_token = token
+          auth.api_client_id = 0
+        end
+
+        # Accept this token (and don't reload the user record) for
+        # 5 minutes. TODO: Request the actual api_client_auth
+        # record from the remote server in case it wants the token
+        # to expire sooner.
+        auth.update_attributes!(expires_at: Time.now + 5.minutes)
+      end
+      return auth
+    else
+      auth = ApiClientAuthorization.
+             includes(:user, :api_client).
+             where('api_token=? and (expires_at is null or expires_at > CURRENT_TIMESTAMP)', token).
+             first
+      if auth && auth.user
+        return auth
+      end
+    end
+    return nil
   end
 
   protected
@@ -88,8 +194,9 @@ class ApiClientAuthorization < ArvadosModel
 
   def permission_to_update
     (permission_to_create and
-     not self.user_id_changed? and
-     not self.owner_uuid_changed?)
+     not uuid_changed? and
+     not user_id_changed? and
+     not owner_uuid_changed?)
   end
 
   def log_update