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steal_emoji_policy_test.exs
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steal_emoji_policy_test.exs
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
use Pleroma.DataCase
alias Pleroma.Config
alias Pleroma.Emoji
alias Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy
setup do
emoji_path = [:instance, :static_dir] |> Config.get() |> Path.join("emoji/stolen")
Emoji.reload()
message = %{
"type" => "Create",
"object" => %{
"emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
"actor" => "https://example.org/users/admin"
}
}
on_exit(fn ->
File.rm_rf!(emoji_path)
end)
[message: message, path: emoji_path]
end
test "does nothing by default", %{message: message} do
refute "firedfox" in installed()
assert {:ok, _message} = StealEmojiPolicy.filter(message)
refute "firedfox" in installed()
end
test "Steals emoji on unknown shortcode from allowed remote host", %{
message: message,
path: path
} do
refute "firedfox" in installed()
refute File.exists?(path)
Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox.png"} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.jpg")}
end)
clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
assert "firedfox" in installed()
assert File.exists?(path)
assert path
|> Path.join("firedfox.png")
|> File.exists?()
end
test "works with unknown extension", %{path: path} do
message = %{
"type" => "Create",
"object" => %{
"emoji" => [{"firedfox", "https://example.org/emoji/firedfox"}],
"actor" => "https://example.org/users/admin"
}
}
fullpath = Path.join(path, "firedfox.png")
Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox"} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.jpg")}
end)
clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
refute "firedfox" in installed()
refute File.exists?(path)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
assert "firedfox" in installed()
assert File.exists?(path)
assert File.exists?(fullpath)
end
test "rejects invalid shortcodes", %{path: path} do
message = %{
"type" => "Create",
"object" => %{
"emoji" => [{"fired/fox", "https://example.org/emoji/firedfox"}],
"actor" => "https://example.org/users/admin"
}
}
fullpath = Path.join(path, "fired/fox.png")
Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox"} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.jpg")}
end)
clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
refute "firedfox" in installed()
refute File.exists?(path)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
refute "fired/fox" in installed()
refute File.exists?(fullpath)
end
test "reject regex shortcode", %{message: message} do
refute "firedfox" in installed()
clear_config(:mrf_steal_emoji,
hosts: ["example.org"],
size_limit: 284_468,
rejected_shortcodes: [~r/firedfox/]
)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
refute "firedfox" in installed()
end
test "reject string shortcode", %{message: message} do
refute "firedfox" in installed()
clear_config(:mrf_steal_emoji,
hosts: ["example.org"],
size_limit: 284_468,
rejected_shortcodes: ["firedfox"]
)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
refute "firedfox" in installed()
end
test "reject if size is above the limit", %{message: message} do
refute "firedfox" in installed()
Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox.png"} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.jpg")}
end)
clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 50_000)
assert {:ok, _message} = StealEmojiPolicy.filter(message)
refute "firedfox" in installed()
end
test "reject if host returns error", %{message: message} do
refute "firedfox" in installed()
Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox.png"} ->
{:ok, %Tesla.Env{status: 404, body: "Not found"}}
end)
clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
ExUnit.CaptureLog.capture_log(fn ->
assert {:ok, _message} = StealEmojiPolicy.filter(message)
end) =~ "MRF.StealEmojiPolicy: Failed to fetch https://example.org/emoji/firedfox.png"
refute "firedfox" in installed()
end
defp installed, do: Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
end

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