X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/3bd5f6c3f353059c15eeea51b16b2fdee694d504..4554374c672ee56608c9ddbd6a48486fe20c90d1:/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 2488d8322f..e84a3d2187 100644
--- a/services/api/app/models/api_client_authorization.rb
+++ b/services/api/app/models/api_client_authorization.rb
@@ -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
@@ -11,6 +17,9 @@ class ApiClientAuthorization < ArvadosModel
     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
@@ -30,23 +39,12 @@ 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 +69,228 @@ class ApiClientAuthorization < ArvadosModel
   end
 
   def scopes_allow_request?(request)
-    scopes_allow? [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.RemoteClusters[uuid_prefix].andand["Host"]) ||
+      (Rails.configuration.RemoteClusters["*"]["Proxy"] &&
+       uuid_prefix+".arvadosapi.com")
+  end
+
+  def self.make_http_client(uuid_prefix:)
+    clnt = HTTPClient.new
+
+    if uuid_prefix && (Rails.configuration.RemoteClusters[uuid_prefix].andand.Insecure ||
+                       Rails.configuration.RemoteClusters['*'].andand.Insecure)
+      clnt.ssl_config.verify_mode = OpenSSL::SSL::VERIFY_NONE
+    else
+      # Use system CA certificates
+      ["/etc/ssl/certs/ca-certificates.crt",
+       "/etc/pki/tls/certs/ca-bundle.crt"]
+        .select { |ca_path| File.readable?(ca_path) }
+        .each { |ca_path| clnt.ssl_config.add_trust_ca(ca_path) }
+    end
+    clnt
+  end
+
+  def self.validate(token:, remote: nil)
+    return nil if !token
+    remote ||= Rails.configuration.ClusterID
+
+    case token[0..2]
+    when 'v2/'
+      _, token_uuid, secret, optional = token.split('/')
+      unless token_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 != token_uuid
+            # token doesn't match the container's token
+            return nil
+          end
+          if !c.runtime_token.nil? and "v2/#{token_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
+
+      # fast path: look up the token in the local database
+      auth = ApiClientAuthorization.
+             includes(:user, :api_client).
+             where('uuid=? and (expires_at is null or expires_at > CURRENT_TIMESTAMP)', token_uuid).
+             first
+      if auth && auth.user &&
+         (secret == auth.api_token ||
+          secret == OpenSSL::HMAC.hexdigest('sha1', auth.api_token, remote))
+        # found it
+        return auth
+      end
+
+      token_uuid_prefix = token_uuid[0..4]
+      if token_uuid_prefix == Rails.configuration.ClusterID
+        # Token is supposedly issued by local cluster, but if the
+        # token were valid, we would have been found in the database
+        # in the above query.
+        return nil
+      elsif token_uuid_prefix.length != 5
+        # malformed
+        return nil
+      end
+
+      # Invariant: token_uuid_prefix != Rails.configuration.ClusterID
+      #
+      # In other words the remaing code in this method below is the
+      # case that determines whether to accept a token that was issued
+      # by a remote cluster when the token absent or expired in our
+      # database.  To begin, we need to ask the cluster that issued
+      # the token to [re]validate it.
+      clnt = ApiClientAuthorization.make_http_client(uuid_prefix: token_uuid_prefix)
+
+      host = remote_host(uuid_prefix: token_uuid_prefix)
+      if !host
+        Rails.logger.warn "remote authentication rejected: no host for #{token_uuid_prefix.inspect}"
+        return nil
+      end
+
+      begin
+        remote_user = SafeJSON.load(
+          clnt.get_content('https://' + host + '/arvados/v1/users/current',
+                           {'remote' => Rails.configuration.ClusterID},
+                           {'Authorization' => 'Bearer ' + token}))
+      rescue => e
+        Rails.logger.warn "remote authentication with token #{token.inspect} failed: #{e}"
+        return nil
+      end
+
+      # Check the response is well formed.
+      if !remote_user.is_a?(Hash) || !remote_user['uuid'].is_a?(String)
+        Rails.logger.warn "remote authentication rejected: remote_user=#{remote_user.inspect}"
+        return nil
+      end
+
+      remote_user_prefix = remote_user['uuid'][0..4]
+
+      # Clusters can only authenticate for their own users.
+      if remote_user_prefix != token_uuid_prefix
+        Rails.logger.warn "remote authentication rejected: claimed remote user #{remote_user_prefix} but token was issued by #{token_uuid_prefix}"
+        return nil
+      end
+
+      # Invariant:    remote_user_prefix == token_uuid_prefix
+      # therefore:    remote_user_prefix != Rails.configuration.ClusterID
+
+      # Add or update user and token in local database so we can
+      # validate subsequent requests faster.
+
+      user = User.find_by_uuid(remote_user['uuid'])
+
+      if !user
+        # Create a new record for this user.
+        user = User.new(uuid: remote_user['uuid'],
+                        is_active: false,
+                        is_admin: false,
+                        email: remote_user['email'],
+                        owner_uuid: system_user_uuid)
+        user.set_initial_username(requested: remote_user['username'])
+      end
+
+      # Sync user record.
+      if remote_user_prefix == Rails.configuration.Login.LoginCluster
+        # Remote cluster controls our user database, copy both
+        # 'is_active' and 'is_admin'
+        user.is_active = remote_user['is_active']
+        user.is_admin = remote_user['is_admin']
+      else
+        if Rails.configuration.Users.NewUsersAreActive ||
+           Rails.configuration.RemoteClusters[remote_user_prefix].andand["ActivateUsers"]
+          # Default policy is to activate users, so match activate
+          # with the remote record.
+          user.is_active = remote_user['is_active']
+        elsif !remote_user['is_active']
+          # Deactivate user if the remote is inactive, otherwise don't
+          # change 'is_active'.
+          user.is_active = false
+        end
+      end
+
+      %w[first_name last_name email prefs].each do |attr|
+        user.send(attr+'=', remote_user[attr])
+      end
+
+      act_as_system_user do
+        user.save!
+
+        # We will accept this token (and avoid reloading the user
+        # record) for 'RemoteTokenRefresh' (default 5 minutes).
+        # Possible todo:
+        # Request the actual api_client_auth record from the remote
+        # server in case it wants the token to expire sooner.
+        auth = ApiClientAuthorization.find_or_create_by(uuid: token_uuid) do |auth|
+          auth.user = user
+          auth.api_client_id = 0
+        end
+        auth.update_attributes!(user: user,
+                                api_token: secret,
+                                api_client_id: 0,
+                                expires_at: Time.now + Rails.configuration.Login.RemoteTokenRefresh)
+      end
+      return auth
+    else
+      # token is not a 'v2' token
+      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
+
+  def salted_token(remote:)
+    if remote.nil?
+      token
+    end
+    'v2/' + uuid + '/' + OpenSSL::HMAC.hexdigest('sha1', api_token, remote)
   end
 
   protected
@@ -87,9 +300,8 @@ class ApiClientAuthorization < ArvadosModel
   end
 
   def permission_to_update
-    (permission_to_create and
-     not self.user_id_changed? and
-     not self.owner_uuid_changed?)
+    permission_to_create && !uuid_changed? &&
+      (current_user.andand.is_admin || !user_id_changed?)
   end
 
   def log_update