Allow disabling authentication related user features (#31535)

We have some instances that only allow using an external authentication
source for authentication. In this case, users changing their email,
password, or linked OpenID connections will not have any effect, and
we'd like to prevent showing that to them to prevent confusion.

Included in this are several changes to support this:
* A new setting to disable user managed authentication credentials
(email, password & OpenID connections)
* A new setting to disable user managed MFA (2FA codes & WebAuthn)
* Fix an issue where some templates had separate logic for determining
if a feature was disabled since it didn't check the globally disabled
features
* Hide more user setting pages in the navbar when their settings aren't
enabled

---------

Co-authored-by: Kyle D <kdumontnu@gmail.com>

routers/web/user/setting/security/2fa.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models/auth"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/web"
@@ -25,6 +26,11 @@ import (
 
 // RegenerateScratchTwoFactor regenerates the user's 2FA scratch code.
 func RegenerateScratchTwoFactor(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsSecurity"] = true
 
@@ -55,6 +61,11 @@ func RegenerateScratchTwoFactor(ctx *context.Context) {
 
 // DisableTwoFactor deletes the user's 2FA settings.
 func DisableTwoFactor(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsSecurity"] = true
 
@@ -142,6 +153,11 @@ func twofaGenerateSecretAndQr(ctx *context.Context) bool {
 
 // EnrollTwoFactor shows the page where the user can enroll into 2FA.
 func EnrollTwoFactor(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsSecurity"] = true
 
@@ -167,6 +183,11 @@ func EnrollTwoFactor(ctx *context.Context) {
 
 // EnrollTwoFactorPost handles enrolling the user into 2FA.
 func EnrollTwoFactorPost(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	form := web.GetForm(ctx).(*forms.TwoFactorAuthForm)
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsSecurity"] = true

routers/web/user/setting/security/openid.go

@@ -17,6 +17,11 @@ import (
 
 // OpenIDPost response for change user's openid
 func OpenIDPost(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageCredentials) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	form := web.GetForm(ctx).(*forms.AddOpenIDForm)
 	ctx.Data["Title"] = ctx.Tr("settings")
 	ctx.Data["PageIsSettingsSecurity"] = true
@@ -105,6 +110,11 @@ func settingsOpenIDVerify(ctx *context.Context) {
 
 // DeleteOpenID response for delete user's openid
 func DeleteOpenID(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageCredentials) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	if err := user_model.DeleteUserOpenID(ctx, &user_model.UserOpenID{ID: ctx.FormInt64("id"), UID: ctx.Doer.ID}); err != nil {
 		ctx.ServerError("DeleteUserOpenID", err)
 		return
@@ -117,6 +127,11 @@ func DeleteOpenID(ctx *context.Context) {
 
 // ToggleOpenIDVisibility response for toggle visibility of user's openid
 func ToggleOpenIDVisibility(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageCredentials) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	if err := user_model.ToggleUserOpenIDVisibility(ctx, ctx.FormInt64("id")); err != nil {
 		ctx.ServerError("ToggleUserOpenIDVisibility", err)
 		return

routers/web/user/setting/security/security.go

@@ -25,6 +25,12 @@ const (
 
 // Security render change user's password page and 2FA
 func Security(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer,
+		setting.UserFeatureManageMFA, setting.UserFeatureManageCredentials) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	ctx.Data["Title"] = ctx.Tr("settings.security")
 	ctx.Data["PageIsSettingsSecurity"] = true
 
@@ -40,6 +46,11 @@ func Security(ctx *context.Context) {
 
 // DeleteAccountLink delete a single account link
 func DeleteAccountLink(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageCredentials) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	id := ctx.FormInt64("id")
 	if id <= 0 {
 		ctx.Flash.Error("Account link id is not given")
@@ -145,4 +156,5 @@ func loadSecurityData(ctx *context.Context) {
 		return
 	}
 	ctx.Data["OpenIDs"] = openid
+	ctx.Data["UserDisabledFeatures"] = user_model.DisabledFeaturesWithLoginType(ctx.Doer)
 }

routers/web/user/setting/security/webauthn.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/models/auth"
+	user_model "code.gitea.io/gitea/models/user"
 	wa "code.gitea.io/gitea/modules/auth/webauthn"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -23,6 +24,11 @@ import (
 
 // WebAuthnRegister initializes the webauthn registration procedure
 func WebAuthnRegister(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	form := web.GetForm(ctx).(*forms.WebauthnRegistrationForm)
 	if form.Name == "" {
 		// Set name to the hexadecimal of the current time
@@ -64,6 +70,11 @@ func WebAuthnRegister(ctx *context.Context) {
 
 // WebauthnRegisterPost receives the response of the security key
 func WebauthnRegisterPost(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	name, ok := ctx.Session.Get("webauthnName").(string)
 	if !ok || name == "" {
 		ctx.ServerError("Get webauthnName", errors.New("no webauthnName"))
@@ -113,6 +124,11 @@ func WebauthnRegisterPost(ctx *context.Context) {
 
 // WebauthnDelete deletes an security key by id
 func WebauthnDelete(ctx *context.Context) {
+	if user_model.IsFeatureDisabledWithLoginType(ctx.Doer, setting.UserFeatureManageMFA) {
+		ctx.Error(http.StatusNotFound)
+		return
+	}
+
 	form := web.GetForm(ctx).(*forms.WebauthnDeleteForm)
 	if _, err := auth.DeleteCredential(ctx, form.ID, ctx.Doer.ID); err != nil {
 		ctx.ServerError("GetWebAuthnCredentialByID", err)