initial commit

tests/integration/unauthorized_dm_access_test.go

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+)
+
+// TestUnauthorizedDMAccess tests DM privacy
+func TestUnauthorizedDMAccess(t *testing.T) {
+	client := newTestClient(t)
+	user1 := createTestAccount(t, client)
+	user2 := createTestAccount(t, client)
+	attacker := createTestAccount(t, client)
+
+	guild := createGuild(t, client, user1.Token, "Test Guild")
+	invite := createChannelInvite(t, client, user1.Token, parseSnowflake(t, guild.SystemChannel))
+	joinGuild(t, client, user2.Token, invite.Code)
+
+	dmChannel := createDmChannel(t, client, user1.Token, parseSnowflake(t, user2.UserID))
+	channelID := parseSnowflake(t, dmChannel.ID)
+
+	message := sendChannelMessage(t, client, user1.Token, channelID, "private DM content")
+
+	resp, err := client.getWithAuth(fmt.Sprintf("/channels/%d/messages?limit=10", channelID), attacker.Token)
+	if err != nil {
+		t.Fatalf("failed to attempt DM read: %v", err)
+	}
+	if resp.StatusCode != http.StatusForbidden && resp.StatusCode != http.StatusNotFound {
+		t.Fatalf("expected 403/404 for unauthorized DM read, got %d", resp.StatusCode)
+	}
+	resp.Body.Close()
+
+	ensureSessionStarted(t, client, attacker.Token)
+	resp, err = client.postJSONWithAuth(fmt.Sprintf("/channels/%d/messages", channelID), map[string]string{"content": "attacker intrusion"}, attacker.Token)
+	if err != nil {
+		t.Fatalf("failed to attempt DM send: %v", err)
+	}
+	if resp.StatusCode != http.StatusForbidden && resp.StatusCode != http.StatusNotFound {
+		t.Fatalf("expected 403/404 for unauthorized DM send, got %d", resp.StatusCode)
+	}
+	resp.Body.Close()
+
+	messageID := parseSnowflake(t, message.ID)
+	resp, err = client.patchJSONWithAuth(fmt.Sprintf("/channels/%d/messages/%d", channelID, messageID), map[string]string{"content": "hacked dm"}, attacker.Token)
+	if err != nil {
+		t.Fatalf("failed to attempt DM edit: %v", err)
+	}
+	if resp.StatusCode != http.StatusForbidden && resp.StatusCode != http.StatusNotFound {
+		t.Fatalf("expected 403/404 for unauthorized DM edit, got %d", resp.StatusCode)
+	}
+	resp.Body.Close()
+}