use existing function to check webauthn support

src/api/core/two_factor/mod.rs

@@ -56,7 +56,7 @@ pub fn is_twofactor_provider_usable(provider_type: i32, provider_data: Option<&s
         x if x == TwoFactorType::YubiKey as i32 => {
             CONFIG._enable_yubico() && CONFIG.yubico_client_id().is_some() && CONFIG.yubico_secret_key().is_some()
         }
-        x if x == TwoFactorType::Webauthn as i32 => CONFIG.domain_set(),
+        x if x == TwoFactorType::Webauthn as i32 => CONFIG.is_webauthn_2fa_supported(),
         x if x == TwoFactorType::Remember as i32 => !CONFIG.disable_2fa_remember(),
         x if x == TwoFactorType::RecoveryCode as i32 => true,
         _ => false,

src/api/core/two_factor/webauthn.rs

@@ -108,8 +108,8 @@ impl WebauthnRegistration {
 
 #[post("/two-factor/get-webauthn", data = "<data>")]
 async fn get_webauthn(data: Json<PasswordOrOtpData>, headers: Headers, conn: DbConn) -> JsonResult {
-    if !CONFIG.domain_set() {
-        err!("`DOMAIN` environment variable is not set. Webauthn disabled")
+    if !CONFIG.is_webauthn_2fa_supported() {
+        err!("Configured `DOMAIN` is not compatible with Webauthn")
     }
 
     let data: PasswordOrOtpData = data.into_inner();

src/api/identity.rs

@@ -887,7 +887,7 @@ async fn _json_err_twofactor(
         match TwoFactorType::from_i32(*provider) {
             Some(TwoFactorType::Authenticator) => { /* Nothing to do for TOTP */ }
 
-            Some(TwoFactorType::Webauthn) if CONFIG.domain_set() => {
+            Some(TwoFactorType::Webauthn) if CONFIG.is_webauthn_2fa_supported() => {
                 let request = webauthn::generate_webauthn_login(user_id, conn).await?;
                 result["TwoFactorProviders2"][provider.to_string()] = request.0;
             }