From eacab0fb056ffc018b7e0abea27db7af435dc553 Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <contact@hacktivis.me>
Date: Sun, 14 Oct 2018 01:45:11 +0200
Subject: [PATCH] Delete Tokens and Authorizations on password change

Closes: https://git.pleroma.social/pleroma/pleroma/issues/320
---
 lib/pleroma/user.ex                    |  5 +++-
 lib/pleroma/web/oauth/authorization.ex | 10 +++++++-
 lib/pleroma/web/oauth/token.ex         | 10 ++++++++
 test/web/oauth/authorization_test.exs  | 22 ++++++++++++++++++
 test/web/oauth/token_test.exs          | 32 ++++++++++++++++++++++++++
 5 files changed, 77 insertions(+), 2 deletions(-)

diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index db6f96daa..e97224731 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -4,7 +4,7 @@ defmodule Pleroma.User do
   import Ecto.{Changeset, Query}
   alias Pleroma.{Repo, User, Object, Web, Activity, Notification}
   alias Comeonin.Pbkdf2
-  alias Pleroma.Web.{OStatus, Websub}
+  alias Pleroma.Web.{OStatus, Websub, OAuth}
   alias Pleroma.Web.ActivityPub.{Utils, ActivityPub}
 
   schema "users" do
@@ -132,6 +132,9 @@ def password_update_changeset(struct, params) do
       |> validate_required([:password, :password_confirmation])
       |> validate_confirmation(:password)
 
+    OAuth.Token.delete_user_tokens(struct)
+    OAuth.Authorization.delete_user_authorizations(struct)
+
     if changeset.valid? do
       hashed = Pbkdf2.hashpwsalt(changeset.changes[:password])
 
diff --git a/lib/pleroma/web/oauth/authorization.ex b/lib/pleroma/web/oauth/authorization.ex
index 23e8eb7b1..2cad4550a 100644
--- a/lib/pleroma/web/oauth/authorization.ex
+++ b/lib/pleroma/web/oauth/authorization.ex
@@ -4,7 +4,7 @@ defmodule Pleroma.Web.OAuth.Authorization do
   alias Pleroma.{User, Repo}
   alias Pleroma.Web.OAuth.{Authorization, App}
 
-  import Ecto.{Changeset}
+  import Ecto.{Changeset, Query}
 
   schema "oauth_authorizations" do
     field(:token, :string)
@@ -45,4 +45,12 @@ def use_token(%Authorization{used: false, valid_until: valid_until} = auth) do
   end
 
   def use_token(%Authorization{used: true}), do: {:error, "already used"}
+
+  def delete_user_authorizations(%User{id: user_id}) do
+    from(
+      a in Pleroma.Web.OAuth.Authorization,
+      where: a.user_id == ^user_id
+    )
+    |> Repo.delete_all()
+  end
 end
diff --git a/lib/pleroma/web/oauth/token.ex b/lib/pleroma/web/oauth/token.ex
index 343fc0c45..a77d5af35 100644
--- a/lib/pleroma/web/oauth/token.ex
+++ b/lib/pleroma/web/oauth/token.ex
@@ -1,6 +1,8 @@
 defmodule Pleroma.Web.OAuth.Token do
   use Ecto.Schema
 
+  import Ecto.Query
+
   alias Pleroma.{User, Repo}
   alias Pleroma.Web.OAuth.{Token, App, Authorization}
 
@@ -35,4 +37,12 @@ def create_token(%App{} = app, %User{} = user) do
 
     Repo.insert(token)
   end
+
+  def delete_user_tokens(%User{id: user_id}) do
+    from(
+      t in Pleroma.Web.OAuth.Token,
+      where: t.user_id == ^user_id
+    )
+    |> Repo.delete_all()
+  end
 end
diff --git a/test/web/oauth/authorization_test.exs b/test/web/oauth/authorization_test.exs
index 4a9e2a3ac..98c7c4133 100644
--- a/test/web/oauth/authorization_test.exs
+++ b/test/web/oauth/authorization_test.exs
@@ -55,4 +55,26 @@ test "use up a token" do
 
     assert {:error, "token expired"} == Authorization.use_token(expired_auth)
   end
+
+  test "delete authorizations" do
+    {:ok, app} =
+      Repo.insert(
+        App.register_changeset(%App{}, %{
+          client_name: "client",
+          scopes: "scope",
+          redirect_uris: "url"
+        })
+      )
+
+    user = insert(:user)
+
+    {:ok, auth} = Authorization.create_authorization(app, user)
+    {:ok, auth} = Authorization.use_token(auth)
+
+    {auths, _} = Authorization.delete_user_authorizations(user)
+
+    {_, invalid} = Authorization.use_token(auth)
+
+    assert auth != invalid
+  end
 end
diff --git a/test/web/oauth/token_test.exs b/test/web/oauth/token_test.exs
index 58448949c..f926ff50b 100644
--- a/test/web/oauth/token_test.exs
+++ b/test/web/oauth/token_test.exs
@@ -29,4 +29,36 @@ test "exchanges a auth token for an access token" do
     auth = Repo.get(Authorization, auth.id)
     {:error, "already used"} = Token.exchange_token(app, auth)
   end
+
+  test "deletes all tokens of a user" do
+    {:ok, app1} =
+      Repo.insert(
+        App.register_changeset(%App{}, %{
+          client_name: "client1",
+          scopes: "scope",
+          redirect_uris: "url"
+        })
+      )
+
+    {:ok, app2} =
+      Repo.insert(
+        App.register_changeset(%App{}, %{
+          client_name: "client2",
+          scopes: "scope",
+          redirect_uris: "url"
+        })
+      )
+
+    user = insert(:user)
+
+    {:ok, auth1} = Authorization.create_authorization(app1, user)
+    {:ok, auth2} = Authorization.create_authorization(app2, user)
+
+    {:ok, token1} = Token.exchange_token(app1, auth1)
+    {:ok, token2} = Token.exchange_token(app2, auth2)
+
+    {tokens, _} = Token.delete_user_tokens(user)
+
+    assert tokens == 2
+  end
 end