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plugin_authn.go
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/
plugin_authn.go
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// Copyright 2022 Paul Greenberg greenpau@outlook.com
//
// 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 security
import (
"fmt"
"net/http"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
"github.com/greenpau/go-authcrunch/pkg/authn"
"github.com/greenpau/go-authcrunch/pkg/requests"
"github.com/greenpau/caddy-security/pkg/util"
)
const (
authnPluginName = "authenticator"
)
func init() {
caddy.RegisterModule(AuthnMiddleware{})
}
// AuthnMiddleware implements Form-Based, Basic, Local, LDAP,
// OpenID Connect, OAuth 2.0, SAML Authentication.
type AuthnMiddleware struct {
Authenticator *authn.Authenticator `json:"authenticator,omitempty"`
}
// CaddyModule returns the Caddy module information.
func (AuthnMiddleware) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "http.handlers.authenticator",
New: func() caddy.Module { return new(AuthnMiddleware) },
}
}
// Provision provisions Authenticator.
func (m *AuthnMiddleware) Provision(ctx caddy.Context) error {
appModule, err := ctx.App("security")
if err != nil {
return err
}
secApp := appModule.(*App)
if secApp == nil {
return fmt.Errorf("security app is nil")
}
if secApp.Config == nil {
return fmt.Errorf("security app config is nil")
}
var foundRef bool
for _, cfg := range secApp.Config.Portals {
if cfg.Name == m.Authenticator.PortalName {
foundRef = true
break
}
}
if !foundRef {
return fmt.Errorf("security app has no %q authentication portal", m.Authenticator.PortalName)
}
return m.Authenticator.Provision(ctx.Logger(m))
}
// UnmarshalCaddyfile unmarshals a caddyfile.
func (m *AuthnMiddleware) UnmarshalCaddyfile(d *caddyfile.Dispenser) (err error) {
a, err := parseAuthnPluginCaddyfile(httpcaddyfile.Helper{Dispenser: d})
if err != nil {
return err
}
m.Authenticator = a
return nil
}
// Validate implements caddy.Validator.
func (m *AuthnMiddleware) Validate() error {
return m.Authenticator.Validate()
}
// ServeHTTP serves authentication portal.
func (m *AuthnMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request, _ caddyhttp.Handler) error {
rr := requests.NewRequest()
rr.ID = util.GetRequestID(r)
return m.Authenticator.ServeHTTP(r.Context(), w, r, rr)
}
// Interface guards
var (
_ caddy.Provisioner = (*AuthnMiddleware)(nil)
_ caddy.Validator = (*AuthnMiddleware)(nil)
_ caddyhttp.MiddlewareHandler = (*AuthnMiddleware)(nil)
_ caddyfile.Unmarshaler = (*AuthnMiddleware)(nil)
)