From 9886aec9f8b09b58c73c55598a2017417a51843d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Dachary?= <loic@dachary.org>
Date: Fri, 24 Feb 2023 14:24:29 +0100
Subject: [PATCH] [BRANDING] X-Forgejo-OTP can be used instead of X-Gitea-OTP

(cherry picked from commit 7b0549cd70aa7cafec853e15b25270847c59850b)
(cherry picked from commit 13e10a65d974c7b594681bfa36402a6144862116)
(cherry picked from commit 89982e6c4a7f9cf7024b2db3ed14b2b79db29064)
(cherry picked from commit a4acf6343d9f5c6dedeb261c524cd7ac5ae1b3c1)
---
 modules/context/api.go              | 11 +++++++++--
 modules/context/api_forgejo_test.go | 23 +++++++++++++++++++++++
 routers/api/v1/api.go               |  2 +-
 templates/swagger/v1_json.tmpl      |  2 +-
 4 files changed, 34 insertions(+), 4 deletions(-)
 create mode 100644 modules/context/api_forgejo_test.go

diff --git a/modules/context/api.go b/modules/context/api.go
index f7a3384691..d511a3ba2d 100644
--- a/modules/context/api.go
+++ b/modules/context/api.go
@@ -188,13 +188,20 @@ func (ctx *APIContext) SetLinkHeader(total, pageSize int) {
 	}
 }
 
+func getOtpHeader(header http.Header) string {
+	otpHeader := header.Get("X-Gitea-OTP")
+	if forgejoHeader := header.Get("X-Forgejo-OTP"); forgejoHeader != "" {
+		otpHeader = forgejoHeader
+	}
+	return otpHeader
+}
+
 // CheckForOTP validates OTP
 func (ctx *APIContext) CheckForOTP() {
 	if skip, ok := ctx.Data["SkipLocalTwoFA"]; ok && skip.(bool) {
 		return // Skip 2FA
 	}
 
-	otpHeader := ctx.Req.Header.Get("X-Gitea-OTP")
 	twofa, err := auth.GetTwoFactorByUID(ctx.Context.Doer.ID)
 	if err != nil {
 		if auth.IsErrTwoFactorNotEnrolled(err) {
@@ -203,7 +210,7 @@ func (ctx *APIContext) CheckForOTP() {
 		ctx.Context.Error(http.StatusInternalServerError)
 		return
 	}
-	ok, err := twofa.ValidateTOTP(otpHeader)
+	ok, err := twofa.ValidateTOTP(getOtpHeader(ctx.Req.Header))
 	if err != nil {
 		ctx.Context.Error(http.StatusInternalServerError)
 		return
diff --git a/modules/context/api_forgejo_test.go b/modules/context/api_forgejo_test.go
new file mode 100644
index 0000000000..b85de55904
--- /dev/null
+++ b/modules/context/api_forgejo_test.go
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: MIT
+
+package context
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetOtpHeader(t *testing.T) {
+	header := http.Header{}
+	assert.EqualValues(t, "", getOtpHeader(header))
+	// Gitea
+	giteaOtp := "123456"
+	header.Set("X-Gitea-OTP", giteaOtp)
+	assert.EqualValues(t, giteaOtp, getOtpHeader(header))
+	// Forgejo has precedence
+	forgejoOtp := "abcdef"
+	header.Set("X-Forgejo-OTP", forgejoOtp)
+	assert.EqualValues(t, forgejoOtp, getOtpHeader(header))
+}
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 691c0f99b0..7f033a98bd 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -56,7 +56,7 @@
 //	     description: Sudo API request as the user provided as the key. Admin privileges are required.
 //	TOTPHeader:
 //	     type: apiKey
-//	     name: X-GITEA-OTP
+//	     name: X-FORGEJO-OTP
 //	     in: header
 //	     description: Must be used in combination with BasicAuth if two-factor authentication is enabled.
 //
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index d7cfe2427a..d6ab5661c5 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -21020,7 +21020,7 @@
     "TOTPHeader": {
       "description": "Must be used in combination with BasicAuth if two-factor authentication is enabled.",
       "type": "apiKey",
-      "name": "X-GITEA-OTP",
+      "name": "X-FORGEJO-OTP",
       "in": "header"
     },
     "Token": {