From 65016b26645d6fdcf0e7c47fc1214bd8b8e723a2 Mon Sep 17 00:00:00 2001
From: Anthony Wang <ta180m@pm.me>
Date: Tue, 29 Mar 2022 16:38:27 -0500
Subject: [PATCH] Check if digest algo is supported in setting module

---
 modules/activitypub/client.go | 7 ++-----
 modules/setting/federation.go | 9 ++++++++-
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/modules/activitypub/client.go b/modules/activitypub/client.go
index 254cec0f83..5c9ea2dd3f 100644
--- a/modules/activitypub/client.go
+++ b/modules/activitypub/client.go
@@ -61,9 +61,6 @@ func NewClient(user *user_model.User, pubID string) (c *Client, err error) {
 		return
 	} else if err = containsRequiredHTTPHeaders(http.MethodPost, setting.Federation.PostHeaders); err != nil {
 		return
-	} else if !httpsig.IsSupportedDigestAlgorithm(setting.Federation.DigestAlgorithm) {
-		err = fmt.Errorf("unsupported digest algorithm: %s", setting.Federation.DigestAlgorithm)
-		return
 	}
 	algos := make([]httpsig.Algorithm, len(setting.Federation.Algorithms))
 	for i, algo := range setting.Federation.Algorithms {
@@ -85,8 +82,8 @@ func NewClient(user *user_model.User, pubID string) (c *Client, err error) {
 	}
 
 	c = &Client{
-		clock:       clock,
-		client:      &http.Client{
+		clock: clock,
+		client: &http.Client{
 			Transport: &http.Transport{
 				Proxy: proxy.Proxy(),
 			},
diff --git a/modules/setting/federation.go b/modules/setting/federation.go
index 12330c6cf3..8aa481cd98 100644
--- a/modules/setting/federation.go
+++ b/modules/setting/federation.go
@@ -4,7 +4,11 @@
 
 package setting
 
-import "code.gitea.io/gitea/modules/log"
+import (
+	"code.gitea.io/gitea/modules/log"
+
+	"github.com/go-fed/httpsig"
+)
 
 // Federation settings
 var (
@@ -26,5 +30,8 @@ var (
 func newFederationService() {
 	if err := Cfg.Section("federation").MapTo(&Federation); err != nil {
 		log.Fatal("Failed to map Federation settings: %v", err)
+	} else if !httpsig.IsSupportedDigestAlgorithm(Federation.DigestAlgorithm) {
+		log.Fatal("unsupported digest algorithm: %s", Federation.DigestAlgorithm)
+		return
 	}
 }