X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/fb3c02b38a24cda422de95f2f8b49002b841cc72..2aa58f31ac8fc696361214a05ab9ba75a5140b08:/services/api/app/models/api_client_authorization.rb

diff --git a/services/api/app/models/api_client_authorization.rb b/services/api/app/models/api_client_authorization.rb
index 0e89869f3c..53ae6af464 100644
--- a/services/api/app/models/api_client_authorization.rb
+++ b/services/api/app/models/api_client_authorization.rb
@@ -1,9 +1,253 @@
-class ApiClientAuthorization < ActiveRecord::Base
+# 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
   after_initialize :assign_random_api_token
+  serialize :scopes, Array
+
+  api_accessible :user, extend: :common do |t|
+    t.add :owner_uuid
+    t.add :user_id
+    t.add :api_client_id
+    # NB the "api_token" db column is a misnomer in that it's only the
+    # "secret" part of a token: a v1 token is just the secret, but a
+    # v2 token is "v2/uuid/secret".
+    t.add :api_token
+    t.add :created_by_ip_address
+    t.add :default_owner_uuid
+    t.add :expires_at
+    t.add :last_used_at
+    t.add :last_used_by_ip_address
+    t.add :scopes
+  end
+
+  UNLOGGED_CHANGES = ['last_used_at', 'last_used_by_ip_address', 'updated_at']
 
   def assign_random_api_token
     self.api_token ||= rand(2**256).to_s(36)
   end
+
+  def owner_uuid
+    self.user.andand.uuid
+  end
+  def owner_uuid_was
+    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 modified_by_client_uuid
+    nil
+  end
+  def modified_by_client_uuid=(x) end
+
+  def modified_by_user_uuid
+    nil
+  end
+  def modified_by_user_uuid=(x) end
+
+  def modified_at
+    nil
+  end
+  def modified_at=(x) end
+
+  def scopes_allow?(req_s)
+    scopes.each do |scope|
+      return true if (scope == 'all') or (scope == req_s) or
+        ((scope.end_with? '/') and (req_s.start_with? scope))
+    end
+    false
+  end
+
+  def scopes_allow_request?(request)
+    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
+    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: nil)
+    return nil if !token
+    remote ||= Rails.configuration.uuid_prefix
+
+    case token[0..2]
+    when 'v2/'
+      _, uuid, secret, optional = token.split('/')
+      unless uuid.andand.length == 27 && secret.andand.length.andand > 0
+        return nil
+      end
+
+      if !optional.nil?
+        # if "optional" is a container uuid, check that it
+        # matches expections.
+        c = Container.where(uuid: optional).first
+        if !c.nil?
+          if !c.auth_uuid.nil? and c.auth_uuid != uuid
+            # token doesn't match the container's token
+            return nil
+          end
+          if !c.runtime_token.nil? and "v2/#{uuid}/#{secret}" != c.runtime_token
+            # token doesn't match the container's token
+            return nil
+          end
+          if ![Container::Locked, Container::Running].include?(c.state)
+            # container isn't locked or running, token shouldn't be used
+            return nil
+          end
+        end
+      end
+
+      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
+        if Rails.configuration.sso_insecure
+          clnt.ssl_config.verify_mode = OpenSSL::SSL::VERIFY_NONE
+        end
+        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|
+          # (this block runs for the "create" case, not for "find")
+          user.is_admin = false
+          user.email = remote_user['email']
+          if remote_user['username'].andand.length.andand > 0
+            user.set_initial_username(requested: remote_user['username'])
+          end
+        end
+
+        if Rails.configuration.new_users_are_active ||
+           Rails.configuration.auto_activate_users_from.include?(remote_user['uuid'][0..4])
+          # Update is_active to whatever it is at the remote end
+          user.is_active = remote_user['is_active']
+        elsif !remote_user['is_active']
+          # Remote user is inactive; our mirror should be, too.
+          user.is_active = false
+        end
+
+        %w[first_name last_name email prefs].each do |attr|
+          user.send(attr+'=', remote_user[attr])
+        end
+
+        user.save!
+
+        auth = ApiClientAuthorization.find_or_create_by(uuid: uuid) do |auth|
+          auth.user = user
+          auth.api_token = secret
+          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!(user: user,
+                                api_token: secret,
+                                api_client_id: 0,
+                                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
+
+  def token
+    v2token
+  end
+
+  def v1token
+    api_token
+  end
+
+  def v2token
+    'v2/' + uuid + '/' + api_token
+  end
+
+  protected
+
+  def permission_to_create
+    current_user.andand.is_admin or (current_user.andand.id == self.user_id)
+  end
+
+  def permission_to_update
+    permission_to_create && !uuid_changed? &&
+      (current_user.andand.is_admin || !user_id_changed?)
+  end
+
+  def log_update
+    super unless (changed - UNLOGGED_CHANGES).empty?
+  end
 end