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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
   6   use Pleroma.DataCase
   7   import Pleroma.Factory
   8   alias Pleroma.Config
   9   alias Pleroma.Web.ActivityPub.MRF.SimplePolicy
  10
  11   setup do:
  12           clear_config(:mrf_simple,
  13             media_removal: [],
  14             media_nsfw: [],
  15             federated_timeline_removal: [],
  16             report_removal: [],
  17             reject: [],
  18             accept: [],
  19             avatar_removal: [],
  20             banner_removal: [],
  21             reject_deletes: []
  22           )
  23
  24   describe "when :media_removal" do
  25     test "is empty" do
  26       Config.put([:mrf_simple, :media_removal], [])
  27       media_message = build_media_message()
  28       local_message = build_local_message()
  29
  30       assert SimplePolicy.filter(media_message) == {:ok, media_message}
  31       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  32     end
  33
  34     test "has a matching host" do
  35       Config.put([:mrf_simple, :media_removal], ["remote.instance"])
  36       media_message = build_media_message()
  37       local_message = build_local_message()
  38
  39       assert SimplePolicy.filter(media_message) ==
  40                {:ok,
  41                 media_message
  42                 |> Map.put("object", Map.delete(media_message["object"], "attachment"))}
  43
  44       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  45     end
  46
  47     test "match with wildcard domain" do
  48       Config.put([:mrf_simple, :media_removal], ["*.remote.instance"])
  49       media_message = build_media_message()
  50       local_message = build_local_message()
  51
  52       assert SimplePolicy.filter(media_message) ==
  53                {:ok,
  54                 media_message
  55                 |> Map.put("object", Map.delete(media_message["object"], "attachment"))}
  56
  57       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  58     end
  59   end
  60
  61   describe "when :media_nsfw" do
  62     test "is empty" do
  63       Config.put([:mrf_simple, :media_nsfw], [])
  64       media_message = build_media_message()
  65       local_message = build_local_message()
  66
  67       assert SimplePolicy.filter(media_message) == {:ok, media_message}
  68       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  69     end
  70
  71     test "has a matching host" do
  72       Config.put([:mrf_simple, :media_nsfw], ["remote.instance"])
  73       media_message = build_media_message()
  74       local_message = build_local_message()
  75
  76       assert SimplePolicy.filter(media_message) ==
  77                {:ok,
  78                 media_message
  79                 |> put_in(["object", "tag"], ["foo", "nsfw"])
  80                 |> put_in(["object", "sensitive"], true)}
  81
  82       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  83     end
  84
  85     test "match with wildcard domain" do
  86       Config.put([:mrf_simple, :media_nsfw], ["*.remote.instance"])
  87       media_message = build_media_message()
  88       local_message = build_local_message()
  89
  90       assert SimplePolicy.filter(media_message) ==
  91                {:ok,
  92                 media_message
  93                 |> put_in(["object", "tag"], ["foo", "nsfw"])
  94                 |> put_in(["object", "sensitive"], true)}
  95
  96       assert SimplePolicy.filter(local_message) == {:ok, local_message}
  97     end
  98   end
  99
 100   defp build_media_message do
 101     %{
 102       "actor" => "https://remote.instance/users/bob",
 103       "type" => "Create",
 104       "object" => %{
 105         "attachment" => [%{}],
 106         "tag" => ["foo"],
 107         "sensitive" => false
 108       }
 109     }
 110   end
 111
 112   describe "when :report_removal" do
 113     test "is empty" do
 114       Config.put([:mrf_simple, :report_removal], [])
 115       report_message = build_report_message()
 116       local_message = build_local_message()
 117
 118       assert SimplePolicy.filter(report_message) == {:ok, report_message}
 119       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 120     end
 121
 122     test "has a matching host" do
 123       Config.put([:mrf_simple, :report_removal], ["remote.instance"])
 124       report_message = build_report_message()
 125       local_message = build_local_message()
 126
 127       assert {:reject, _} = SimplePolicy.filter(report_message)
 128       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 129     end
 130
 131     test "match with wildcard domain" do
 132       Config.put([:mrf_simple, :report_removal], ["*.remote.instance"])
 133       report_message = build_report_message()
 134       local_message = build_local_message()
 135
 136       assert {:reject, _} = SimplePolicy.filter(report_message)
 137       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 138     end
 139   end
 140
 141   defp build_report_message do
 142     %{
 143       "actor" => "https://remote.instance/users/bob",
 144       "type" => "Flag"
 145     }
 146   end
 147
 148   describe "when :federated_timeline_removal" do
 149     test "is empty" do
 150       Config.put([:mrf_simple, :federated_timeline_removal], [])
 151       {_, ftl_message} = build_ftl_actor_and_message()
 152       local_message = build_local_message()
 153
 154       assert SimplePolicy.filter(ftl_message) == {:ok, ftl_message}
 155       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 156     end
 157
 158     test "has a matching host" do
 159       {actor, ftl_message} = build_ftl_actor_and_message()
 160
 161       ftl_message_actor_host =
 162         ftl_message
 163         |> Map.fetch!("actor")
 164         |> URI.parse()
 165         |> Map.fetch!(:host)
 166
 167       Config.put([:mrf_simple, :federated_timeline_removal], [ftl_message_actor_host])
 168       local_message = build_local_message()
 169
 170       assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
 171       assert actor.follower_address in ftl_message["to"]
 172       refute actor.follower_address in ftl_message["cc"]
 173       refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
 174       assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
 175
 176       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 177     end
 178
 179     test "match with wildcard domain" do
 180       {actor, ftl_message} = build_ftl_actor_and_message()
 181
 182       ftl_message_actor_host =
 183         ftl_message
 184         |> Map.fetch!("actor")
 185         |> URI.parse()
 186         |> Map.fetch!(:host)
 187
 188       Config.put([:mrf_simple, :federated_timeline_removal], ["*." <> ftl_message_actor_host])
 189       local_message = build_local_message()
 190
 191       assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
 192       assert actor.follower_address in ftl_message["to"]
 193       refute actor.follower_address in ftl_message["cc"]
 194       refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
 195       assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
 196
 197       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 198     end
 199
 200     test "has a matching host but only as:Public in to" do
 201       {_actor, ftl_message} = build_ftl_actor_and_message()
 202
 203       ftl_message_actor_host =
 204         ftl_message
 205         |> Map.fetch!("actor")
 206         |> URI.parse()
 207         |> Map.fetch!(:host)
 208
 209       ftl_message = Map.put(ftl_message, "cc", [])
 210
 211       Config.put([:mrf_simple, :federated_timeline_removal], [ftl_message_actor_host])
 212
 213       assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
 214       refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
 215       assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
 216     end
 217   end
 218
 219   defp build_ftl_actor_and_message do
 220     actor = insert(:user)
 221
 222     {actor,
 223      %{
 224        "actor" => actor.ap_id,
 225        "to" => ["https://www.w3.org/ns/activitystreams#Public", "http://foo.bar/baz"],
 226        "cc" => [actor.follower_address, "http://foo.bar/qux"]
 227      }}
 228   end
 229
 230   describe "when :reject" do
 231     test "is empty" do
 232       Config.put([:mrf_simple, :reject], [])
 233
 234       remote_message = build_remote_message()
 235
 236       assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
 237     end
 238
 239     test "activity has a matching host" do
 240       Config.put([:mrf_simple, :reject], ["remote.instance"])
 241
 242       remote_message = build_remote_message()
 243
 244       assert {:reject, _} = SimplePolicy.filter(remote_message)
 245     end
 246
 247     test "activity matches with wildcard domain" do
 248       Config.put([:mrf_simple, :reject], ["*.remote.instance"])
 249
 250       remote_message = build_remote_message()
 251
 252       assert {:reject, _} = SimplePolicy.filter(remote_message)
 253     end
 254
 255     test "actor has a matching host" do
 256       Config.put([:mrf_simple, :reject], ["remote.instance"])
 257
 258       remote_user = build_remote_user()
 259
 260       assert {:reject, _} = SimplePolicy.filter(remote_user)
 261     end
 262   end
 263
 264   describe "when :accept" do
 265     test "is empty" do
 266       Config.put([:mrf_simple, :accept], [])
 267
 268       local_message = build_local_message()
 269       remote_message = build_remote_message()
 270
 271       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 272       assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
 273     end
 274
 275     test "is not empty but activity doesn't have a matching host" do
 276       Config.put([:mrf_simple, :accept], ["non.matching.remote"])
 277
 278       local_message = build_local_message()
 279       remote_message = build_remote_message()
 280
 281       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 282       assert {:reject, _} = SimplePolicy.filter(remote_message)
 283     end
 284
 285     test "activity has a matching host" do
 286       Config.put([:mrf_simple, :accept], ["remote.instance"])
 287
 288       local_message = build_local_message()
 289       remote_message = build_remote_message()
 290
 291       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 292       assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
 293     end
 294
 295     test "activity matches with wildcard domain" do
 296       Config.put([:mrf_simple, :accept], ["*.remote.instance"])
 297
 298       local_message = build_local_message()
 299       remote_message = build_remote_message()
 300
 301       assert SimplePolicy.filter(local_message) == {:ok, local_message}
 302       assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
 303     end
 304
 305     test "actor has a matching host" do
 306       Config.put([:mrf_simple, :accept], ["remote.instance"])
 307
 308       remote_user = build_remote_user()
 309
 310       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
 311     end
 312   end
 313
 314   describe "when :avatar_removal" do
 315     test "is empty" do
 316       Config.put([:mrf_simple, :avatar_removal], [])
 317
 318       remote_user = build_remote_user()
 319
 320       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
 321     end
 322
 323     test "is not empty but it doesn't have a matching host" do
 324       Config.put([:mrf_simple, :avatar_removal], ["non.matching.remote"])
 325
 326       remote_user = build_remote_user()
 327
 328       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
 329     end
 330
 331     test "has a matching host" do
 332       Config.put([:mrf_simple, :avatar_removal], ["remote.instance"])
 333
 334       remote_user = build_remote_user()
 335       {:ok, filtered} = SimplePolicy.filter(remote_user)
 336
 337       refute filtered["icon"]
 338     end
 339
 340     test "match with wildcard domain" do
 341       Config.put([:mrf_simple, :avatar_removal], ["*.remote.instance"])
 342
 343       remote_user = build_remote_user()
 344       {:ok, filtered} = SimplePolicy.filter(remote_user)
 345
 346       refute filtered["icon"]
 347     end
 348   end
 349
 350   describe "when :banner_removal" do
 351     test "is empty" do
 352       Config.put([:mrf_simple, :banner_removal], [])
 353
 354       remote_user = build_remote_user()
 355
 356       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
 357     end
 358
 359     test "is not empty but it doesn't have a matching host" do
 360       Config.put([:mrf_simple, :banner_removal], ["non.matching.remote"])
 361
 362       remote_user = build_remote_user()
 363
 364       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
 365     end
 366
 367     test "has a matching host" do
 368       Config.put([:mrf_simple, :banner_removal], ["remote.instance"])
 369
 370       remote_user = build_remote_user()
 371       {:ok, filtered} = SimplePolicy.filter(remote_user)
 372
 373       refute filtered["image"]
 374     end
 375
 376     test "match with wildcard domain" do
 377       Config.put([:mrf_simple, :banner_removal], ["*.remote.instance"])
 378
 379       remote_user = build_remote_user()
 380       {:ok, filtered} = SimplePolicy.filter(remote_user)
 381
 382       refute filtered["image"]
 383     end
 384   end
 385
 386   describe "when :reject_deletes is empty" do
 387     setup do: Config.put([:mrf_simple, :reject_deletes], [])
 388
 389     test "it accepts deletions even from rejected servers" do
 390       Config.put([:mrf_simple, :reject], ["remote.instance"])
 391
 392       deletion_message = build_remote_deletion_message()
 393
 394       assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
 395     end
 396
 397     test "it accepts deletions even from non-whitelisted servers" do
 398       Config.put([:mrf_simple, :accept], ["non.matching.remote"])
 399
 400       deletion_message = build_remote_deletion_message()
 401
 402       assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
 403     end
 404   end
 405
 406   describe "when :reject_deletes is not empty but it doesn't have a matching host" do
 407     setup do: Config.put([:mrf_simple, :reject_deletes], ["non.matching.remote"])
 408
 409     test "it accepts deletions even from rejected servers" do
 410       Config.put([:mrf_simple, :reject], ["remote.instance"])
 411
 412       deletion_message = build_remote_deletion_message()
 413
 414       assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
 415     end
 416
 417     test "it accepts deletions even from non-whitelisted servers" do
 418       Config.put([:mrf_simple, :accept], ["non.matching.remote"])
 419
 420       deletion_message = build_remote_deletion_message()
 421
 422       assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
 423     end
 424   end
 425
 426   describe "when :reject_deletes has a matching host" do
 427     setup do: Config.put([:mrf_simple, :reject_deletes], ["remote.instance"])
 428
 429     test "it rejects the deletion" do
 430       deletion_message = build_remote_deletion_message()
 431
 432       assert {:reject, _} = SimplePolicy.filter(deletion_message)
 433     end
 434   end
 435
 436   describe "when :reject_deletes match with wildcard domain" do
 437     setup do: Config.put([:mrf_simple, :reject_deletes], ["*.remote.instance"])
 438
 439     test "it rejects the deletion" do
 440       deletion_message = build_remote_deletion_message()
 441
 442       assert {:reject, _} = SimplePolicy.filter(deletion_message)
 443     end
 444   end
 445
 446   defp build_local_message do
 447     %{
 448       "actor" => "#{Pleroma.Web.base_url()}/users/alice",
 449       "to" => [],
 450       "cc" => []
 451     }
 452   end
 453
 454   defp build_remote_message do
 455     %{"actor" => "https://remote.instance/users/bob"}
 456   end
 457
 458   defp build_remote_user do
 459     %{
 460       "id" => "https://remote.instance/users/bob",
 461       "icon" => %{
 462         "url" => "http://example.com/image.jpg",
 463         "type" => "Image"
 464       },
 465       "image" => %{
 466         "url" => "http://example.com/image.jpg",
 467         "type" => "Image"
 468       },
 469       "type" => "Person"
 470     }
 471   end
 472
 473   defp build_remote_deletion_message do
 474     %{
 475       "type" => "Delete",
 476       "actor" => "https://remote.instance/users/bob"
 477     }
 478   end
 479 end