initial commit

tests/integration/sudo_mode_token_wrong_user_rejected_test.go

@@ -0,0 +1,136 @@
+/*
+ * 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 (
+	"net/http"
+	"testing"
+)
+
+// TestSudoModeTokenWrongUserRejected verifies that a valid sudo token
+// from one user cannot be used by a different user to bypass MFA verification.
+// This is a critical security test to prevent token theft attacks.
+func TestSudoModeTokenWrongUserRejected(t *testing.T) {
+	client := newTestClient(t)
+
+	account1 := createTestAccount(t, client)
+	secret1 := newTotpSecret(t)
+	resp, err := client.postJSONWithAuth("/users/@me/mfa/totp/enable", map[string]string{
+		"secret": secret1,
+		"code":   totpCodePrev(t, secret1),
+	}, account1.Token)
+	if err != nil {
+		t.Fatalf("failed to enable totp for user1: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("enable totp for user1 returned %d: %s", resp.StatusCode, readResponseBody(resp))
+	}
+	resp.Body.Close()
+
+	loginResp, err := client.postJSON("/auth/login", loginRequest{
+		Email:    account1.Email,
+		Password: account1.Password,
+	})
+	if err != nil {
+		t.Fatalf("failed to login user1: %v", err)
+	}
+	var login loginResponse
+	decodeJSONResponse(t, loginResp, &login)
+
+	resp, err = client.postJSON("/auth/login/mfa/totp", map[string]string{
+		"code":   totpCodeNow(t, secret1),
+		"ticket": login.Ticket,
+	})
+	if err != nil {
+		t.Fatalf("failed to complete MFA login for user1: %v", err)
+	}
+	var mfaLogin mfaLoginResponse
+	decodeJSONResponse(t, resp, &mfaLogin)
+	account1.Token = mfaLogin.Token
+
+	resp, err = client.postJSONWithAuth("/users/@me/mfa/backup-codes", map[string]any{
+		"mfa_method": "totp",
+		"mfa_code":   totpCodeNext(t, secret1),
+		"regenerate": false,
+	}, account1.Token)
+	if err != nil {
+		t.Fatalf("failed to request backup codes for user1: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", resp.StatusCode, readResponseBody(resp))
+	}
+
+	user1SudoToken := resp.Header.Get(sudoModeHeader)
+	if user1SudoToken == "" {
+		t.Fatalf("expected sudo token for user1")
+	}
+	resp.Body.Close()
+
+	account2 := createTestAccount(t, client)
+	secret2 := newTotpSecret(t)
+	resp, err = client.postJSONWithAuth("/users/@me/mfa/totp/enable", map[string]string{
+		"secret": secret2,
+		"code":   totpCodePrev(t, secret2),
+	}, account2.Token)
+	if err != nil {
+		t.Fatalf("failed to enable totp for user2: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("enable totp for user2 returned %d: %s", resp.StatusCode, readResponseBody(resp))
+	}
+	resp.Body.Close()
+
+	loginResp, err = client.postJSON("/auth/login", loginRequest{
+		Email:    account2.Email,
+		Password: account2.Password,
+	})
+	if err != nil {
+		t.Fatalf("failed to login user2: %v", err)
+	}
+	decodeJSONResponse(t, loginResp, &login)
+
+	resp, err = client.postJSON("/auth/login/mfa/totp", map[string]string{
+		"code":   totpCodeNow(t, secret2),
+		"ticket": login.Ticket,
+	})
+	if err != nil {
+		t.Fatalf("failed to complete MFA login for user2: %v", err)
+	}
+	decodeJSONResponse(t, resp, &mfaLogin)
+	account2.Token = mfaLogin.Token
+
+	resp, err = client.postJSONWithAuthAndHeaders("/users/@me/disable", map[string]any{}, account2.Token, map[string]string{
+		sudoModeHeader: user1SudoToken,
+	})
+	if err != nil {
+		t.Fatalf("failed to make request: %v", err)
+	}
+	if resp.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 when using another user's sudo token, got %d: %s", resp.StatusCode, readResponseBody(resp))
+	}
+
+	var errResp errorResponse
+	decodeJSONResponse(t, resp, &errResp)
+	if errResp.Code != "SUDO_MODE_REQUIRED" {
+		t.Fatalf("expected SUDO_MODE_REQUIRED error code, got: %s", errResp.Code)
+	}
+
+	t.Logf("successfully rejected cross-user sudo token attack")
+}