Add a setting to allow anonymous access to individual gists while still RequireLogin everywhere else (#229)

* Add a setting to allow accessing individual gists without auth

This is a middle ground between the existing setting "Require Login",
which requires login to do anything at all, and having it off, which
shows a public list of gists and more generally allows discovering info
about the users/gists of the instance without login.

The idea of this setting is that it is "require login" for everything
except individual gists.

Fixes #228.


Co-authored-by: Thomas Miceli <tho.miceli@gmail.com>

internal/auth/auth.go

@@ -0,0 +1,18 @@
+package auth
+
+type AuthInfoProvider interface {
+	RequireLogin() (bool, error)
+	AllowGistsWithoutLogin() (bool, error)
+}
+
+func ShouldAllowUnauthenticatedGistAccess(prov AuthInfoProvider, isSingleGistAccess bool) (bool, error) {
+	require, err := prov.RequireLogin()
+	if err != nil {
+		return false, err
+	}
+	allow, err := prov.AllowGistsWithoutLogin()
+	if err != nil {
+		return false, err
+	}
+	return !require || (isSingleGistAccess && allow), nil
+}

internal/db/admin_setting.go

@@ -10,10 +10,11 @@ type AdminSetting struct {
 }
 
 const (
-	SettingDisableSignup    = "disable-signup"
-	SettingRequireLogin     = "require-login"
-	SettingDisableLoginForm = "disable-login-form"
-	SettingDisableGravatar  = "disable-gravatar"
+	SettingDisableSignup          = "disable-signup"
+	SettingRequireLogin           = "require-login"
+	SettingAllowGistsWithoutLogin = "allow-gists-without-login"
+	SettingDisableLoginForm       = "disable-login-form"
+	SettingDisableGravatar        = "disable-gravatar"
 )
 
 func GetSetting(key string) (string, error) {
@@ -62,3 +63,21 @@ func initAdminSettings(settings map[string]string) error {
 
 	return nil
 }
+
+type DBAuthInfo struct{}
+
+func (auth DBAuthInfo) RequireLogin() (bool, error) {
+	s, err := GetSetting(SettingRequireLogin)
+	if err != nil {
+		return true, err
+	}
+	return s == "1", nil
+}
+
+func (auth DBAuthInfo) AllowGistsWithoutLogin() (bool, error) {
+	s, err := GetSetting(SettingAllowGistsWithoutLogin)
+	if err != nil {
+		return false, err
+	}
+	return s == "1", nil
+}

internal/db/db.go

@@ -52,10 +52,11 @@ func Setup(dbPath string, sharedCache bool) error {
 
 	// Default admin setting values
 	return initAdminSettings(map[string]string{
-		SettingDisableSignup:    "0",
-		SettingRequireLogin:     "0",
-		SettingDisableLoginForm: "0",
-		SettingDisableGravatar:  "0",
+		SettingDisableSignup:          "0",
+		SettingRequireLogin:           "0",
+		SettingAllowGistsWithoutLogin: "0",
+		SettingDisableLoginForm:       "0",
+		SettingDisableGravatar:        "0",
 	})
 }
 

internal/i18n/locales/cs-CZ.yml

@@ -173,7 +173,8 @@ admin.disable-login: Zakázat přihlášení
 admin.disable-login_help: Zakázat přihlašování pomocí formuláře pro přihlášení a vynutit používání OAuth poskytovatele.
 admin.disable-gravatar: Zakázat Gravatar
 admin.disable-gravatar_help: Zakázat použití Gravataru jako poskytovatele avatara.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Opravdu chcete smazat tohoto uživatele?
 
 admin.gists.title: Titulek

internal/i18n/locales/de-DE.yml

@@ -185,7 +185,8 @@ admin.disable-login: 'Login-Maske deaktivieren'
 admin.disable-login_help: 'Login über Login-Maske verbieten und Benutzung von OAuth Providern erzwingen.'
 admin.disable-gravatar: 'Gravatar deaktivieren'
 admin.disable-gravatar_help: 'Gravatar als Avatar-Anbieter deaktivieren.'
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: 'Willst du diesen Benutzer löschen?'
 
 admin.gists.title: 'Titel'

internal/i18n/locales/en-US.yml

@@ -203,6 +203,8 @@ admin.disable-signup: Disable signup
 admin.disable-signup_help: Forbid the creation of new accounts.
 admin.require-login: Require login
 admin.require-login_help: Enforce users to be logged in to see gists.
+admin.allow-gists-without-login: Allow individual gists without login
+admin.allow-gists-without-login_help: Allow individual gists to be viewed and downloaded without login, while requiring login for discovering gists.
 admin.disable-login: Disable login form
 admin.disable-login_help: Forbid logging in via the login form to force using OAuth providers instead.
 admin.disable-gravatar: Disable Gravatar

internal/i18n/locales/es-ES.yml

@@ -165,7 +165,8 @@ admin.disable-login: Deshabilitar formulario de inicio de sesión
 admin.disable-login_help: Prohibir el inicio de sesión a través del formulario de inicio de sesión para forzar el uso de proveedores de OAuth en su lugar.
 admin.disable-gravatar: Deshabilitar Gravatar
 admin.disable-gravatar_help: Deshabilitar el uso de Gravatar como proveedor de avatar.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: ¿Quieres eliminar a este usuario?
 
 admin.gists.title: Título

internal/i18n/locales/fr-FR.yml

@@ -166,7 +166,8 @@ admin.disable-login: Désactiver le formulaire de connexion
 admin.disable-login_help: Interdire la connexion via le formulaire de connexion pour forcer l'utilisation des fournisseurs OAuth à la place.
 admin.disable-gravatar: Désactiver Gravatar
 admin.disable-gravatar_help: Désactiver l'utilisation de Gravatar comme fournisseur d'avatar.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Voulez-vous supprimer cet utilisateur ?
 
 admin.gists.title: Titre

internal/i18n/locales/hu-HU.yml

@@ -186,7 +186,8 @@ admin.disable-login: Bejelentkezés űrlap letiltása
 admin.disable-login_help: Letiltja a bejelentkezés űrlapon keresztüli bejelentkezéseket, OAuth szolgáltatókat ajánlva helyette.
 admin.disable-gravatar: Gravatar kikapcsolása
 admin.disable-gravatar_help: Tiltsd le a Gravatar-t mint profilkép szolgáltató.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Biztosan törlöd ezt a felhasználót?
 
 admin.gists.title: Cím

internal/i18n/locales/pt-BR.yml

@@ -163,7 +163,8 @@ admin.disable-login: Desabilitar formulário de login
 admin.disable-login_help: Proibir o login através do formulário de login para forçar o uso de provedores de OAuth no lugar.
 admin.disable-gravatar: Desabilitar Gravatar
 admin.disable-gravatar_help: Desabilitar o uso do Gravatar como provedor de avatar.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Quer excluir este usuário?
 
 admin.gists.title: Título

internal/i18n/locales/ru-RU.yml

@@ -166,7 +166,8 @@ admin.disable-login: Запретить авторизацию по паролю
 admin.disable-login_help: Запретить авторизацию с вводом пароля, форсировать внешнюю авторизацию через Gitea/GitHub.
 admin.disable-gravatar: Запретить Gravatar
 admin.disable-gravatar_help: Запретить использование Gravatar как провайдера изображений профиля.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Вы уверены что хотите удалить этого пользователя?
 
 admin.gists.title: Название

internal/i18n/locales/tr-TR.yml

@@ -207,7 +207,8 @@ admin.disable-login: Disable login form
 admin.disable-login_help: Forbid logging in via the login form to force using OAuth providers instead.
 admin.disable-gravatar: Disable Gravatar
 admin.disable-gravatar_help: Disable the usage of Gravatar as an avatar provider.
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: Do you want to delete this user ?
 
 admin.gists.title: Title

internal/i18n/locales/zh-CN.yml

@@ -166,7 +166,8 @@ admin.disable-login: 禁用登录表单
 admin.disable-login_help: 禁止使用登录表单进行登录以强制通过 OAuth 提供方登录。
 admin.disable-gravatar: 禁用 Gravatar
 admin.disable-gravatar_help: 停止使用 Gravatar 作为头像提供方。
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: 你想要删除此用户吗？
 
 admin.gists.title: 标题

internal/i18n/locales/zh-TW.yml

@@ -177,7 +177,8 @@ admin.disable-login: 關閉登錄頁面
 admin.disable-login_help: 關閉通過登錄頁面登錄，強制使用 OAuth 提供者。
 admin.disable-gravatar: 禁用 Gravatar
 admin.disable-gravatar_help: 禁止使用 Gravatar 作為頭像提供者。
-
+admin.allow-gists-without-login:
+admin.allow-gists-without-login_help:
 admin.users.delete_confirm: 您要刪除這個使用者嗎？
 
 admin.gists.title: 標題

internal/ssh/git_ssh.go

@@ -2,14 +2,16 @@ package ssh
 
 import (
 	"errors"
+	"io"
+	"os/exec"
+	"strings"
+
 	"github.com/rs/zerolog/log"
+	"github.com/thomiceli/opengist/internal/auth"
 	"github.com/thomiceli/opengist/internal/db"
 	"github.com/thomiceli/opengist/internal/git"
 	"golang.org/x/crypto/ssh"
 	"gorm.io/gorm"
-	"io"
-	"os/exec"
-	"strings"
 )
 
 func runGitCommand(ch ssh.Channel, gitCmd string, key string, ip string) error {
@@ -37,7 +39,7 @@ func runGitCommand(ch ssh.Channel, gitCmd string, key string, ip string) error {
 		return errors.New("gist not found")
 	}
 
-	requireLogin, err := db.GetSetting(db.SettingRequireLogin)
+	allowUnauthenticated, err := auth.ShouldAllowUnauthenticatedGistAccess(db.DBAuthInfo{}, true)
 	if err != nil {
 		return errors.New("internal server error")
 	}
@@ -50,7 +52,7 @@ func runGitCommand(ch ssh.Channel, gitCmd string, key string, ip string) error {
 	if verb == "receive-pack" ||
 		gist.Private == 2 ||
 		gist.ID == 0 ||
-		requireLogin == "1" {
+		!allowUnauthenticated {
 
 		pubKey, err := db.SSHKeyExistsForUser(key, gist.UserID)
 		if err != nil {

internal/web/auth.go

@@ -442,3 +442,15 @@ func getAvatarUrlFromProvider(provider string, identifier string) string {
 	}
 	return ""
 }
+
+type ContextAuthInfo struct {
+	context echo.Context
+}
+
+func (auth ContextAuthInfo) RequireLogin() (bool, error) {
+	return getData(auth.context, "RequireLogin") == true, nil
+}
+
+func (auth ContextAuthInfo) AllowGistsWithoutLogin() (bool, error) {
+	return getData(auth.context, "AllowGistsWithoutLogin") == true, nil
+}

internal/web/git_http.go

@@ -19,6 +19,7 @@ import (
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
 	"github.com/rs/zerolog/log"
+	"github.com/thomiceli/opengist/internal/auth"
 	"github.com/thomiceli/opengist/internal/db"
 	"github.com/thomiceli/opengist/internal/git"
 	"github.com/thomiceli/opengist/internal/memdb"
@@ -70,12 +71,17 @@ func gitHttp(ctx echo.Context) error {
 
 			setData(ctx, "repositoryPath", repositoryPath)
 
+			allow, err := auth.ShouldAllowUnauthenticatedGistAccess(ContextAuthInfo{ctx}, true)
+			if err != nil {
+				panic("impossible")
+			}
+
 			// Shows basic auth if :
 			// - user wants to push the gist
 			// - user wants to clone/pull a private gist
 			// - gist is not found (obfuscation)
 			// - admin setting to require login is set to true
-			if isPull && gist.Private != db.PrivateVisibility && gist.ID != 0 && !getData(ctx, "RequireLogin").(bool) {
+			if isPull && gist.Private != db.PrivateVisibility && gist.ID != 0 && allow {
 				return route.handler(ctx)
 			}
 

internal/web/server.go

@@ -27,6 +27,7 @@ import (
 	"github.com/labstack/echo/v4/middleware"
 	"github.com/markbates/goth/gothic"
 	"github.com/rs/zerolog/log"
+	"github.com/thomiceli/opengist/internal/auth"
 	"github.com/thomiceli/opengist/internal/config"
 	"github.com/thomiceli/opengist/internal/db"
 	"github.com/thomiceli/opengist/internal/git"
@@ -309,7 +310,7 @@ func NewServer(isDev bool) *Server {
 
 		g3 := g1.Group("/:user/:gistname")
 		{
-			g3.Use(checkRequireLogin, gistInit)
+			g3.Use(makeCheckRequireLogin(true), gistInit)
 			g3.GET("", gistIndex)
 			g3.GET("/rev/:revision", gistIndex)
 			g3.GET("/revisions", revisions)
@@ -321,9 +322,9 @@ func NewServer(isDev bool) *Server {
 			g3.GET("/edit", edit, logged, writePermission)
 			g3.POST("/edit", processCreate, logged, writePermission)
 			g3.POST("/like", like, logged)
-			g3.GET("/likes", likes)
+			g3.GET("/likes", likes, checkRequireLogin)
 			g3.POST("/fork", fork, logged)
-			g3.GET("/forks", forks)
+			g3.GET("/forks", forks, checkRequireLogin)
 			g3.PUT("/checkbox", checkbox, logged, writePermission)
 		}
 	}
@@ -516,21 +517,31 @@ func logged(next echo.HandlerFunc) echo.HandlerFunc {
 	}
 }
 
-func checkRequireLogin(next echo.HandlerFunc) echo.HandlerFunc {
-	return func(ctx echo.Context) error {
-		if user := getUserLogged(ctx); user != nil {
+func makeCheckRequireLogin(isSingleGistAccess bool) echo.MiddlewareFunc {
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(ctx echo.Context) error {
+			if user := getUserLogged(ctx); user != nil {
+				return next(ctx)
+			}
+
+			allow, err := auth.ShouldAllowUnauthenticatedGistAccess(ContextAuthInfo{ctx}, isSingleGistAccess)
+			if err != nil {
+				panic("impossible")
+			}
+
+			if !allow {
+				addFlash(ctx, tr(ctx, "flash.auth.must-be-logged-in"), "error")
+				return redirect(ctx, "/login")
+			}
 			return next(ctx)
 		}
-
-		require := getData(ctx, "RequireLogin")
-		if require == true {
-			addFlash(ctx, tr(ctx, "flash.auth.must-be-logged-in"), "error")
-			return redirect(ctx, "/login")
-		}
-		return next(ctx)
 	}
 }
 
+func checkRequireLogin(next echo.HandlerFunc) echo.HandlerFunc {
+	return makeCheckRequireLogin(false)(next)
+}
+
 func noRouteFound(echo.Context) error {
 	return notFound("Page not found")
 }

internal/web/test/auth_test.go

@@ -89,3 +89,61 @@ func login(t *testing.T, s *testServer, user db.UserDTO) {
 	err := s.request("POST", "/login", user, 302)
 	require.NoError(t, err)
 }
+
+type settingSet struct {
+	key   string `form:"key"`
+	value string `form:"value"`
+}
+
+func TestAnonymous(t *testing.T) {
+	setup(t)
+	s, err := newTestServer()
+	require.NoError(t, err, "Failed to create test server")
+	defer teardown(t, s)
+
+	user := db.UserDTO{Username: "thomas", Password: "azeaze"}
+	register(t, s, user)
+
+	err = s.request("PUT", "/admin-panel/set-config", settingSet{"require-login", "1"}, 200)
+	require.NoError(t, err)
+
+	gist1 := db.GistDTO{
+		Title:       "gist1",
+		Description: "my first gist",
+		VisibilityDTO: db.VisibilityDTO{
+			Private: 0,
+		},
+		Name:    []string{"gist1.txt", "gist2.txt", "gist3.txt"},
+		Content: []string{"yeah", "yeah\ncool", "yeah\ncool gist actually"},
+	}
+	err = s.request("POST", "/", gist1, 302)
+	require.NoError(t, err)
+
+	gist1db, err := db.GetGistByID("1")
+	require.NoError(t, err)
+
+	err = s.request("GET", "/all", nil, 200)
+	require.NoError(t, err)
+
+	cookie := s.sessionCookie
+	s.sessionCookie = ""
+
+	err = s.request("GET", "/all", nil, 302)
+	require.NoError(t, err)
+
+	// Should redirect to login if RequireLogin
+	err = s.request("GET", "/"+gist1db.User.Username+"/"+gist1db.Uuid, nil, 302)
+	require.NoError(t, err)
+
+	s.sessionCookie = cookie
+
+	err = s.request("PUT", "/admin-panel/set-config", settingSet{"allow-gists-without-login", "1"}, 200)
+	require.NoError(t, err)
+
+	s.sessionCookie = ""
+
+	// Should return results
+	err = s.request("GET", "/"+gist1db.User.Username+"/"+gist1db.Uuid, nil, 200)
+	require.NoError(t, err)
+
+}

templates/pages/admin_config.html

@@ -93,6 +93,17 @@
                     </button>
                 </div>
             </li>
+            <li class="list-none gap-x-4 py-5">
+                <div class="flex items-center justify-between">
+                    <span class="flex flex-grow flex-col">
+                        <span class="text-sm font-medium leading-6 text-slate-700 dark:text-slate-300">{{ .locale.Tr "admin.allow-gists-without-login" }}</span>
+                        <span class="text-sm text-gray-400 dark:text-gray-400">{{ .locale.Tr "admin.allow-gists-without-login_help" }}</span>
+                    </span>
+                    <button type="button" id="allow-gists-without-login" data-bool="{{ .AllowGistsWithoutLogin }}" class="toggle-button {{ if .AllowGistsWithoutLogin }}bg-primary-600{{else}}bg-gray-300 dark:bg-gray-400{{end}} relative inline-flex h-6 w-11 ml-4 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-primary-600 focus:ring-offset-2" role="switch" aria-checked="false" aria-labelledby="availability-label" aria-describedby="availability-description">
+                        <span aria-hidden="true" class="{{ if .AllowGistsWithoutLogin }}translate-x-5{{else}}translate-x-0{{end}} pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out"></span>
+                    </button>
+                </div>
+            </li>
             <li class="list-none gap-x-4 py-5">
                 <div class="flex items-center justify-between">
                     <span class="flex flex-grow flex-col">