[ARVADOS] updated: 2.1.0-2204-gf2861b559

Git user git at public.arvados.org
Tue Apr 5 15:45:39 UTC 2022


Summary of changes:
 .../app/controllers/arvados/v1/links_controller.rb |  55 +++++-
 services/api/test/integration/permissions_test.rb  | 217 +++++++++++++++++++--
 2 files changed, 256 insertions(+), 16 deletions(-)

       via  f2861b559f7aec8dccc7d76705f15e4feb871848 (commit)
      from  f48b65a09641e88aad471c8bacac1437038ed3e4 (commit)

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commit f2861b559f7aec8dccc7d76705f15e4feb871848
Author: Tom Clegg <tom at curii.com>
Date:   Tue Apr 5 11:44:30 2022 -0400

    18865: Cherry-pick '18865-collection-permission-links' merge
    
    3c73e2337ed73cd44e9bcc2d38a4dd742637ad19 onto 2.4-release
    
    refs #18865
    
    Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom at curii.com>

diff --git a/services/api/app/controllers/arvados/v1/links_controller.rb b/services/api/app/controllers/arvados/v1/links_controller.rb
index 384ffd64b..7716a3d5c 100644
--- a/services/api/app/controllers/arvados/v1/links_controller.rb
+++ b/services/api/app/controllers/arvados/v1/links_controller.rb
@@ -26,8 +26,8 @@ class Arvados::V1::LinksController < ApplicationController
   def get_permissions
     if current_user.andand.can?(manage: @object)
       # find all links and return them
-      @objects = Link.where(link_class: "permission",
-                            head_uuid: params[:uuid])
+      @objects = Link.unscoped.where(link_class: "permission",
+                                     head_uuid: params[:uuid])
       @offset = 0
       @limit = @objects.count
       render_list
@@ -39,14 +39,37 @@ class Arvados::V1::LinksController < ApplicationController
   protected
 
   def find_object_by_uuid
+    if params[:id] && params[:id].match(/\D/)
+      params[:uuid] = params.delete :id
+    end
     if action_name == 'get_permissions'
       # get_permissions accepts a UUID for any kind of object.
       @object = ArvadosModel::resource_class_for_uuid(params[:uuid])
         .readable_by(*@read_users)
         .where(uuid: params[:uuid])
         .first
-    else
+    elsif !current_user
       super
+    else
+      # The usual permission-filtering index query is unnecessarily
+      # inefficient, and doesn't match all permission links that
+      # should be visible (see #18865).  Instead, we look up the link
+      # by UUID, then check whether (a) its tail_uuid is the current
+      # user or (b) its head_uuid is an object the current_user
+      # can_manage.
+      link = Link.unscoped.where(uuid: params[:uuid]).first
+      if link && link.link_class != 'permission'
+        # Not a permission link. Re-fetch using generic
+        # permission-filtering query.
+        super
+      elsif link && (current_user.uuid == link.tail_uuid ||
+                     current_user.can?(manage: link.head_uuid))
+        # Permission granted.
+        @object = link
+      else
+        # Permission denied, i.e., link is invisible => 404.
+        @object = nil
+      end
     end
   end
 
@@ -86,6 +109,32 @@ class Arvados::V1::LinksController < ApplicationController
         k
       end
     end
+
+    # If the provided filters are enough to limit the results to
+    # permission links with specific head_uuids or
+    # tail_uuid=current_user, bypass the normal readable_by query
+    # (which doesn't match all can_manage-able items, see #18865) --
+    # just ensure the current user actually has can_manage permission
+    # for the provided head_uuids, removing any that don't. At that
+    # point the caller's filters are an effective permission filter.
+    if @filters.include?(['link_class', '=', 'permission'])
+      @filters.map do |k|
+        if k[0] == 'tail_uuid' && k[1] == '=' && k[2] == current_user.uuid
+          @objects = Link.unscoped
+        elsif k[0] == 'head_uuid'
+          if k[1] == '=' && current_user.can?(manage: k[2])
+            @objects = Link.unscoped
+          elsif k[1] == 'in'
+            # Modify the filter operand element (k[2]) in place,
+            # removing any non-permitted UUIDs.
+            k[2].select! do |head_uuid|
+              current_user.can?(manage: head_uuid)
+            end
+            @objects = Link.unscoped
+          end
+        end
+      end
+    end
   end
 
 end
diff --git a/services/api/test/integration/permissions_test.rb b/services/api/test/integration/permissions_test.rb
index 9eae518c1..65f5adc1d 100644
--- a/services/api/test/integration/permissions_test.rb
+++ b/services/api/test/integration/permissions_test.rb
@@ -451,35 +451,226 @@ class PermissionsTest < ActionDispatch::IntegrationTest
 
     # Should be able to read links directly too
     get "/arvados/v1/links/#{can_read_uuid}",
-        params: {},
       headers: auth(:active)
     assert_response :success
 
+    ### Create some objects of different types (other than projects)
+    ### inside a subproject inside the shared project, and share those
+    ### individual objects with a 3rd user ("spectator").
+    post '/arvados/v1/groups',
+         params: {
+           group: {
+             owner_uuid: groups(:public).uuid,
+             name: 'permission test subproject',
+             group_class: 'project',
+           },
+         },
+         headers: auth(:admin)
+    assert_response :success
+    subproject_uuid = json_response['uuid']
+
+    test_types = ['collection', 'workflow', 'container_request']
+    test_type_create_attrs = {
+      'container_request' => {
+        command: ["echo", "foo"],
+        container_image: links(:docker_image_collection_tag).name,
+        cwd: "/tmp",
+        environment: {},
+        mounts: {"/out" => {kind: "tmp", capacity: 1000000}},
+        output_path: "/out",
+        runtime_constraints: {"vcpus" => 1, "ram" => 2},
+      },
+    }
+
+    test_object = {}
+    test_object_perm_link = {}
+    test_types.each do |test_type|
+      post "/arvados/v1/#{test_type}s",
+           params: {
+             test_type.to_sym => {
+               owner_uuid: subproject_uuid,
+               name: "permission test #{test_type} in subproject",
+             }.merge(test_type_create_attrs[test_type] || {}).to_json,
+           },
+           headers: auth(:admin)
+      assert_response :success
+      test_object[test_type] = json_response
+
+      post '/arvados/v1/links',
+           params: {
+             link: {
+               tail_uuid: users(:spectator).uuid,
+               link_class: 'permission',
+               name: 'can_read',
+               head_uuid: test_object[test_type]['uuid'],
+             }
+           },
+           headers: auth(:admin)
+      assert_response :success
+      test_object_perm_link[test_type] = json_response
+    end
+
+    # The "active-can_manage-project" permission should cause the
+    # "spectator-can_read-object" links to be visible to the "active"
+    # user.
+    test_types.each do |test_type|
+      get "/arvados/v1/permissions/#{test_object[test_type]['uuid']}",
+          headers: auth(:active)
+      assert_response :success
+      perm_uuids = json_response['items'].map { |item| item['uuid'] }
+      assert_includes perm_uuids, test_object_perm_link[test_type]['uuid'], "can_read_uuid not found"
+
+      get "/arvados/v1/links/#{test_object_perm_link[test_type]['uuid']}",
+          headers: auth(:active)
+      assert_response :success
+
+      [
+        ['head_uuid', '=', test_object[test_type]['uuid']],
+        ['head_uuid', 'in', [test_object[test_type]['uuid']]],
+        ['head_uuid', 'in', [users(:admin).uuid, test_object[test_type]['uuid']]],
+      ].each do |filter|
+        get "/arvados/v1/links",
+            params: {
+              filters: ([['link_class', '=', 'permission'], filter]).to_json,
+            },
+            headers: auth(:active)
+        assert_response :success
+        assert_not_empty json_response['items'], "could not find can_read link using index with filter #{filter}"
+        assert_equal test_object_perm_link[test_type]['uuid'], json_response['items'][0]['uuid']
+      end
+
+      # The "spectator-can_read-object" link should be visible to the
+      # subject user ("spectator") in a filter query, even without
+      # can_manage permission on the target object.
+      [
+        ['tail_uuid', '=', users(:spectator).uuid],
+      ].each do |filter|
+        get "/arvados/v1/links",
+            params: {
+              filters: ([['link_class', '=', 'permission'], filter]).to_json,
+            },
+            headers: auth(:spectator)
+        assert_response :success
+        perm_uuids = json_response['items'].map { |item| item['uuid'] }
+        assert_includes perm_uuids, test_object_perm_link[test_type]['uuid'], "could not find can_read link using index with filter #{filter}"
+      end
+    end
+
     ### Now delete the can_manage link
     delete "/arvados/v1/links/#{can_manage_uuid}",
-      params: nil,
       headers: auth(:active)
     assert_response :success
 
     # Should not be able read these permission links again
-    get "/arvados/v1/permissions/#{groups(:public).uuid}",
-      params: nil,
+    test_types.each do |test_type|
+      get "/arvados/v1/permissions/#{groups(:public).uuid}",
+          headers: auth(:active)
+      assert_response 404
+
+      get "/arvados/v1/permissions/#{test_object[test_type]['uuid']}",
+          headers: auth(:active)
+      assert_response 404
+
+      get "/arvados/v1/links",
+          params: {
+            filters: [["link_class", "=", "permission"], ["head_uuid", "=", groups(:public).uuid]].to_json
+          },
+          headers: auth(:active)
+      assert_response :success
+      assert_equal [], json_response['items']
+
+      [
+        ['head_uuid', '=', test_object[test_type]['uuid']],
+        ['head_uuid', 'in', [users(:admin).uuid, test_object[test_type]['uuid']]],
+        ['head_uuid', 'in', []],
+      ].each do |filter|
+        get "/arvados/v1/links",
+            params: {
+              :filters => [["link_class", "=", "permission"], filter].to_json
+            },
+            headers: auth(:active)
+        assert_response :success
+        assert_equal [], json_response['items']
+      end
+
+      # Should not be able to read links directly either
+      get "/arvados/v1/links/#{can_read_uuid}",
+          headers: auth(:active)
+      assert_response 404
+
+      test_types.each do |test_type|
+        get "/arvados/v1/links/#{test_object_perm_link[test_type]['uuid']}",
+            headers: auth(:active)
+        assert_response 404
+      end
+    end
+
+    ### Create a collection, and share it with a direct permission
+    ### link (as opposed to sharing its parent project)
+    post "/arvados/v1/collections",
+      params: {
+        collection: {
+          name: 'permission test',
+        }
+      },
+      headers: auth(:admin)
+    assert_response :success
+    collection_uuid = json_response['uuid']
+    post "/arvados/v1/links",
+      params: {
+        link: {
+          tail_uuid: users(:spectator).uuid,
+          link_class: 'permission',
+          name: 'can_read',
+          head_uuid: collection_uuid,
+          properties: {}
+        }
+      },
+      headers: auth(:admin)
+    assert_response :success
+    can_read_collection_uuid = json_response['uuid']
+
+    # Should not be able read the permission link via permissions API,
+    # because permission is only can_read, not can_manage
+    get "/arvados/v1/permissions/#{collection_uuid}",
       headers: auth(:active)
     assert_response 404
 
-    get "/arvados/v1/links",
-        params: {
-          :filters => [["link_class", "=", "permission"], ["head_uuid", "=", groups(:public).uuid]].to_json
-        },
+    # Should not be able to read the permission link directly, for
+    # same reason
+    get "/arvados/v1/links/#{can_read_collection_uuid}",
       headers: auth(:active)
+    assert_response 404
+
+    ### Now add a can_manage link
+    post "/arvados/v1/links",
+      params: {
+        link: {
+          tail_uuid: users(:active).uuid,
+          link_class: 'permission',
+          name: 'can_manage',
+          head_uuid: collection_uuid,
+          properties: {}
+        }
+      },
+      headers: auth(:admin)
     assert_response :success
-    assert_equal [], json_response['items']
+    can_manage_collection_uuid = json_response['uuid']
 
-    # Should not be able to read links directly either
-    get "/arvados/v1/links/#{can_read_uuid}",
-        params: {},
+    # Should be able read both permission links via permissions API
+    get "/arvados/v1/permissions/#{collection_uuid}",
       headers: auth(:active)
-    assert_response 404
+    assert_response :success
+    perm_uuids = json_response['items'].map { |item| item['uuid'] }
+    assert_includes perm_uuids, can_read_collection_uuid, "can_read_uuid not found"
+    assert_includes perm_uuids, can_manage_collection_uuid, "can_manage_uuid not found"
+
+    # Should be able to read both permission links directly
+    [can_read_collection_uuid, can_manage_collection_uuid].each do |uuid|
+      get "/arvados/v1/links/#{uuid}",
+        headers: auth(:active)
+      assert_response :success
+    end
   end
 
   test "get_permissions returns 404 for nonexistent uuid" do

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