mirror of
https://github.com/caddyserver/caddy.git
synced 2025-11-03 19:17:29 -05:00
d6f86cccf5
* use gofmput to format code * use gci to format imports * reconfigure gci * linter autofixes * rearrange imports a little * export GOOS=windows golangci-lint run ./... --fix
127 lines
3.7 KiB
Go
127 lines
3.7 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package caddyauth
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"go.uber.org/zap"
|
|
|
|
"github.com/caddyserver/caddy/v2"
|
|
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterModule(Authentication{})
|
|
}
|
|
|
|
// Authentication is a middleware which provides user authentication.
|
|
// Rejects requests with HTTP 401 if the request is not authenticated.
|
|
//
|
|
// After a successful authentication, the placeholder
|
|
// `{http.auth.user.id}` will be set to the username, and also
|
|
// `{http.auth.user.*}` placeholders may be set for any authentication
|
|
// modules that provide user metadata.
|
|
//
|
|
// Its API is still experimental and may be subject to change.
|
|
type Authentication struct {
|
|
// A set of authentication providers. If none are specified,
|
|
// all requests will always be unauthenticated.
|
|
ProvidersRaw caddy.ModuleMap `json:"providers,omitempty" caddy:"namespace=http.authentication.providers"`
|
|
|
|
Providers map[string]Authenticator `json:"-"`
|
|
|
|
logger *zap.Logger
|
|
}
|
|
|
|
// CaddyModule returns the Caddy module information.
|
|
func (Authentication) CaddyModule() caddy.ModuleInfo {
|
|
return caddy.ModuleInfo{
|
|
ID: "http.handlers.authentication",
|
|
New: func() caddy.Module { return new(Authentication) },
|
|
}
|
|
}
|
|
|
|
// Provision sets up a.
|
|
func (a *Authentication) Provision(ctx caddy.Context) error {
|
|
a.logger = ctx.Logger()
|
|
a.Providers = make(map[string]Authenticator)
|
|
mods, err := ctx.LoadModule(a, "ProvidersRaw")
|
|
if err != nil {
|
|
return fmt.Errorf("loading authentication providers: %v", err)
|
|
}
|
|
for modName, modIface := range mods.(map[string]any) {
|
|
a.Providers[modName] = modIface.(Authenticator)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (a Authentication) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
|
|
var user User
|
|
var authed bool
|
|
var err error
|
|
for provName, prov := range a.Providers {
|
|
user, authed, err = prov.Authenticate(w, r)
|
|
if err != nil {
|
|
a.logger.Error("auth provider returned error",
|
|
zap.String("provider", provName),
|
|
zap.Error(err))
|
|
continue
|
|
}
|
|
if authed {
|
|
break
|
|
}
|
|
}
|
|
if !authed {
|
|
return caddyhttp.Error(http.StatusUnauthorized, fmt.Errorf("not authenticated"))
|
|
}
|
|
|
|
repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
|
|
repl.Set("http.auth.user.id", user.ID)
|
|
for k, v := range user.Metadata {
|
|
repl.Set("http.auth.user."+k, v)
|
|
}
|
|
|
|
return next.ServeHTTP(w, r)
|
|
}
|
|
|
|
// Authenticator is a type which can authenticate a request.
|
|
// If a request was not authenticated, it returns false. An
|
|
// error is only returned if authenticating the request fails
|
|
// for a technical reason (not for bad/missing credentials).
|
|
type Authenticator interface {
|
|
Authenticate(http.ResponseWriter, *http.Request) (User, bool, error)
|
|
}
|
|
|
|
// User represents an authenticated user.
|
|
type User struct {
|
|
// The ID of the authenticated user.
|
|
ID string
|
|
|
|
// Any other relevant data about this
|
|
// user. Keys should be adhere to Caddy
|
|
// conventions (snake_casing), as all
|
|
// keys will be made available as
|
|
// placeholders.
|
|
Metadata map[string]string
|
|
}
|
|
|
|
// Interface guards
|
|
var (
|
|
_ caddy.Provisioner = (*Authentication)(nil)
|
|
_ caddyhttp.MiddlewareHandler = (*Authentication)(nil)
|
|
)
|