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Extract auth middleware from service (go-gitea#27028)
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Related go-gitea#27027

Extract the router logic from `services/auth/middleware.go` into
`routers/web` <-> `routers/common` <-> `routers/api`.
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@KN4CK3R
KN4CK3R authored Sep 12, 2023
1 parent 7818121 commit 591f586
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Showing 4 changed files with 262 additions and 266 deletions.
105 changes: 103 additions & 2 deletions routers/api/v1/api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@ import (
"code.gitea.io/gitea/routers/api/v1/repo"
"code.gitea.io/gitea/routers/api/v1/settings"
"code.gitea.io/gitea/routers/api/v1/user"
"code.gitea.io/gitea/routers/common"
"code.gitea.io/gitea/services/auth"
context_service "code.gitea.io/gitea/services/context"
"code.gitea.io/gitea/services/forms"
Expand Down Expand Up @@ -709,6 +710,106 @@ func buildAuthGroup() *auth.Group {
return group
}

func apiAuth(authMethod auth.Method) func(*context.APIContext) {
return func(ctx *context.APIContext) {
ar, err := common.AuthShared(ctx.Base, nil, authMethod)
if err != nil {
ctx.Error(http.StatusUnauthorized, "APIAuth", err)
return
}
ctx.Doer = ar.Doer
ctx.IsSigned = ar.Doer != nil
ctx.IsBasicAuth = ar.IsBasicAuth
}
}

// verifyAuthWithOptions checks authentication according to options
func verifyAuthWithOptions(options *common.VerifyOptions) func(ctx *context.APIContext) {
return func(ctx *context.APIContext) {
// Check prohibit login users.
if ctx.IsSigned {
if !ctx.Doer.IsActive && setting.Service.RegisterEmailConfirm {
ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "This account is not activated.",
})
return
}
if !ctx.Doer.IsActive || ctx.Doer.ProhibitLogin {
log.Info("Failed authentication attempt for %s from %s", ctx.Doer.Name, ctx.RemoteAddr())
ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "This account is prohibited from signing in, please contact your site administrator.",
})
return
}

if ctx.Doer.MustChangePassword {
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "You must change your password. Change it at: " + setting.AppURL + "/user/change_password",
})
return
}
}

// Redirect to dashboard if user tries to visit any non-login page.
if options.SignOutRequired && ctx.IsSigned && ctx.Req.URL.RequestURI() != "/" {
ctx.Redirect(setting.AppSubURL + "/")
return
}

if options.SignInRequired {
if !ctx.IsSigned {
// Restrict API calls with error message.
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "Only signed in user is allowed to call APIs.",
})
return
} else if !ctx.Doer.IsActive && setting.Service.RegisterEmailConfirm {
ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "This account is not activated.",
})
return
}
if ctx.IsSigned && ctx.IsBasicAuth {
if skip, ok := ctx.Data["SkipLocalTwoFA"]; ok && skip.(bool) {
return // Skip 2FA
}
twofa, err := auth_model.GetTwoFactorByUID(ctx.Doer.ID)
if err != nil {
if auth_model.IsErrTwoFactorNotEnrolled(err) {
return // No 2FA enrollment for this user
}
ctx.InternalServerError(err)
return
}
otpHeader := ctx.Req.Header.Get("X-Gitea-OTP")
ok, err := twofa.ValidateTOTP(otpHeader)
if err != nil {
ctx.InternalServerError(err)
return
}
if !ok {
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "Only signed in user is allowed to call APIs.",
})
return
}
}
}

if options.AdminRequired {
if !ctx.Doer.IsAdmin {
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "You have no permission to request for this.",
})
return
}
}
}
}

// Routes registers all v1 APIs routes to web application.
func Routes() *web.Route {
m := web.NewRoute()
Expand All @@ -728,9 +829,9 @@ func Routes() *web.Route {
m.Use(context.APIContexter())

// Get user from session if logged in.
m.Use(auth.APIAuth(buildAuthGroup()))
m.Use(apiAuth(buildAuthGroup()))

m.Use(auth.VerifyAuthWithOptionsAPI(&auth.VerifyOptions{
m.Use(verifyAuthWithOptions(&common.VerifyOptions{
SignInRequired: setting.Service.RequireSignInView,
}))

Expand Down
45 changes: 45 additions & 0 deletions routers/common/auth.go
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,45 @@
// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package common

import (
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/web/middleware"
auth_service "code.gitea.io/gitea/services/auth"
)

type AuthResult struct {
Doer *user_model.User
IsBasicAuth bool
}

func AuthShared(ctx *context.Base, sessionStore auth_service.SessionStore, authMethod auth_service.Method) (ar AuthResult, err error) {
ar.Doer, err = authMethod.Verify(ctx.Req, ctx.Resp, ctx, sessionStore)
if err != nil {
return ar, err
}
if ar.Doer != nil {
if ctx.Locale.Language() != ar.Doer.Language {
ctx.Locale = middleware.Locale(ctx.Resp, ctx.Req)
}
ar.IsBasicAuth = ctx.Data["AuthedMethod"].(string) == auth_service.BasicMethodName

ctx.Data["IsSigned"] = true
ctx.Data[middleware.ContextDataKeySignedUser] = ar.Doer
ctx.Data["SignedUserID"] = ar.Doer.ID
ctx.Data["IsAdmin"] = ar.Doer.IsAdmin
} else {
ctx.Data["SignedUserID"] = int64(0)
}
return ar, nil
}

// VerifyOptions contains required or check options
type VerifyOptions struct {
SignInRequired bool
SignOutRequired bool
AdminRequired bool
DisableCSRF bool
}
123 changes: 114 additions & 9 deletions routers/web/web.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ package web
import (
gocontext "context"
"net/http"
"strings"

"code.gitea.io/gitea/models/perm"
"code.gitea.io/gitea/models/unit"
Expand All @@ -19,6 +20,7 @@ import (
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/validation"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/modules/web/middleware"
"code.gitea.io/gitea/modules/web/routing"
"code.gitea.io/gitea/routers/common"
"code.gitea.io/gitea/routers/web/admin"
Expand Down Expand Up @@ -46,7 +48,7 @@ import (

"gitea.com/go-chi/captcha"
"github.com/NYTimes/gziphandler"
"github.com/go-chi/chi/v5/middleware"
chi_middleware "github.com/go-chi/chi/v5/middleware"
"github.com/go-chi/cors"
"github.com/prometheus/client_golang/prometheus"
)
Expand Down Expand Up @@ -95,6 +97,109 @@ func buildAuthGroup() *auth_service.Group {
return group
}

func webAuth(authMethod auth_service.Method) func(*context.Context) {
return func(ctx *context.Context) {
ar, err := common.AuthShared(ctx.Base, ctx.Session, authMethod)
if err != nil {
log.Error("Failed to verify user: %v", err)
ctx.Error(http.StatusUnauthorized, "Verify")
return
}
ctx.Doer = ar.Doer
ctx.IsSigned = ar.Doer != nil
ctx.IsBasicAuth = ar.IsBasicAuth
if ctx.Doer == nil {
// ensure the session uid is deleted
_ = ctx.Session.Delete("uid")
}
}
}

// verifyAuthWithOptions checks authentication according to options
func verifyAuthWithOptions(options *common.VerifyOptions) func(ctx *context.Context) {
return func(ctx *context.Context) {
// Check prohibit login users.
if ctx.IsSigned {
if !ctx.Doer.IsActive && setting.Service.RegisterEmailConfirm {
ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
ctx.HTML(http.StatusOK, "user/auth/activate")
return
}
if !ctx.Doer.IsActive || ctx.Doer.ProhibitLogin {
log.Info("Failed authentication attempt for %s from %s", ctx.Doer.Name, ctx.RemoteAddr())
ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
return
}

if ctx.Doer.MustChangePassword {
if ctx.Req.URL.Path != "/user/settings/change_password" {
if strings.HasPrefix(ctx.Req.UserAgent(), "git") {
ctx.Error(http.StatusUnauthorized, ctx.Tr("auth.must_change_password"))
return
}
ctx.Data["Title"] = ctx.Tr("auth.must_change_password")
ctx.Data["ChangePasscodeLink"] = setting.AppSubURL + "/user/change_password"
if ctx.Req.URL.Path != "/user/events" {
middleware.SetRedirectToCookie(ctx.Resp, setting.AppSubURL+ctx.Req.URL.RequestURI())
}
ctx.Redirect(setting.AppSubURL + "/user/settings/change_password")
return
}
} else if ctx.Req.URL.Path == "/user/settings/change_password" {
// make sure that the form cannot be accessed by users who don't need this
ctx.Redirect(setting.AppSubURL + "/")
return
}
}

// Redirect to dashboard (or alternate location) if user tries to visit any non-login page.
if options.SignOutRequired && ctx.IsSigned && ctx.Req.URL.RequestURI() != "/" {
ctx.RedirectToFirst(ctx.FormString("redirect_to"))
return
}

if !options.SignOutRequired && !options.DisableCSRF && ctx.Req.Method == "POST" {
ctx.Csrf.Validate(ctx)
if ctx.Written() {
return
}
}

if options.SignInRequired {
if !ctx.IsSigned {
if ctx.Req.URL.Path != "/user/events" {
middleware.SetRedirectToCookie(ctx.Resp, setting.AppSubURL+ctx.Req.URL.RequestURI())
}
ctx.Redirect(setting.AppSubURL + "/user/login")
return
} else if !ctx.Doer.IsActive && setting.Service.RegisterEmailConfirm {
ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
ctx.HTML(http.StatusOK, "user/auth/activate")
return
}
}

// Redirect to log in page if auto-signin info is provided and has not signed in.
if !options.SignOutRequired && !ctx.IsSigned &&
len(ctx.GetSiteCookie(setting.CookieUserName)) > 0 {
if ctx.Req.URL.Path != "/user/events" {
middleware.SetRedirectToCookie(ctx.Resp, setting.AppSubURL+ctx.Req.URL.RequestURI())
}
ctx.Redirect(setting.AppSubURL + "/user/login")
return
}

if options.AdminRequired {
if !ctx.Doer.IsAdmin {
ctx.Error(http.StatusForbidden)
return
}
ctx.Data["PageIsAdmin"] = true
}
}
}

func ctxDataSet(args ...any) func(ctx *context.Context) {
return func(ctx *context.Context) {
for i := 0; i < len(args); i += 2 {
Expand Down Expand Up @@ -144,10 +249,10 @@ func Routes() *web.Route {
mid = append(mid, common.Sessioner(), context.Contexter())

// Get user from session if logged in.
mid = append(mid, auth_service.Auth(buildAuthGroup()))
mid = append(mid, webAuth(buildAuthGroup()))

// GetHead allows a HEAD request redirect to GET if HEAD method is not defined for that route
mid = append(mid, middleware.GetHead)
mid = append(mid, chi_middleware.GetHead)

if setting.API.EnableSwagger {
// Note: The route is here but no in API routes because it renders a web page
Expand All @@ -168,12 +273,12 @@ func Routes() *web.Route {

// registerRoutes register routes
func registerRoutes(m *web.Route) {
reqSignIn := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{SignInRequired: true})
reqSignOut := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{SignOutRequired: true})
reqSignIn := verifyAuthWithOptions(&common.VerifyOptions{SignInRequired: true})
reqSignOut := verifyAuthWithOptions(&common.VerifyOptions{SignOutRequired: true})
// TODO: rename them to "optSignIn", which means that the "sign-in" could be optional, depends on the VerifyOptions (RequireSignInView)
ignSignIn := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{SignInRequired: setting.Service.RequireSignInView})
ignExploreSignIn := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{SignInRequired: setting.Service.RequireSignInView || setting.Service.Explore.RequireSigninView})
ignSignInAndCsrf := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{DisableCSRF: true})
ignSignIn := verifyAuthWithOptions(&common.VerifyOptions{SignInRequired: setting.Service.RequireSignInView})
ignExploreSignIn := verifyAuthWithOptions(&common.VerifyOptions{SignInRequired: setting.Service.RequireSignInView || setting.Service.Explore.RequireSigninView})
ignSignInAndCsrf := verifyAuthWithOptions(&common.VerifyOptions{DisableCSRF: true})
validation.AddBindingRules()

linkAccountEnabled := func(ctx *context.Context) {
Expand Down Expand Up @@ -543,7 +648,7 @@ func registerRoutes(m *web.Route) {

m.Get("/avatar/{hash}", user.AvatarByEmailHash)

adminReq := auth_service.VerifyAuthWithOptions(&auth_service.VerifyOptions{SignInRequired: true, AdminRequired: true})
adminReq := verifyAuthWithOptions(&common.VerifyOptions{SignInRequired: true, AdminRequired: true})

// ***** START: Admin *****
m.Group("/admin", func() {
Expand Down
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