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// Copyright 2024 The Forgejo Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package shared
import (
"net/http"
auth_model "code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/routers/common"
"code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/context"
"github.com/go-chi/cors"
)
func Middlewares() (stack []any) {
stack = append(stack, securityHeaders())
if setting.CORSConfig.Enabled {
stack = append(stack, cors.Handler(cors.Options{
AllowedOrigins: setting.CORSConfig.AllowDomain,
AllowedMethods: setting.CORSConfig.Methods,
AllowCredentials: setting.CORSConfig.AllowCredentials,
AllowedHeaders: append([]string{"Authorization", "X-Gitea-OTP", "X-Forgejo-OTP"}, setting.CORSConfig.Headers...),
MaxAge: int(setting.CORSConfig.MaxAge.Seconds()),
}))
}
return append(stack,
context.APIContexter(),
checkDeprecatedAuthMethods,
// Get user from session if logged in.
apiAuth(buildAuthGroup()),
verifyAuthWithOptions(&common.VerifyOptions{
SignInRequired: setting.Service.RequireSignInView,
}),
)
}
func buildAuthGroup() *auth.Group {
group := auth.NewGroup(
&auth.OAuth2{},
&auth.HTTPSign{},
&auth.Basic{}, // FIXME: this should be removed once we don't allow basic auth in API
)
if setting.Service.EnableReverseProxyAuthAPI {
group.Add(&auth.ReverseProxy{})
}
if setting.IsWindows && auth_model.IsSSPIEnabled(db.DefaultContext) {
group.Add(&auth.SSPI{}) // it MUST be the last, see the comment of SSPI
}
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 options.AdminRequired {
if !ctx.Doer.IsAdmin {
ctx.JSON(http.StatusForbidden, map[string]string{
"message": "You have no permission to request for this.",
})
return
}
}
}
}
// check for and warn against deprecated authentication options
func checkDeprecatedAuthMethods(ctx *context.APIContext) {
if ctx.FormString("token") != "" || ctx.FormString("access_token") != "" {
ctx.Resp.Header().Set("Warning", "token and access_token API authentication is deprecated and will be removed in gitea 1.23. Please use AuthorizationHeaderToken instead. Existing queries will continue to work but without authorization.")
}
}
func securityHeaders() func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
// CORB: https://www.chromium.org/Home/chromium-security/corb-for-developers
// http://stackoverflow.com/a/3146618/244009
resp.Header().Set("x-content-type-options", "nosniff")
next.ServeHTTP(resp, req)
})
}
}
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