Jan Dittberner
7ec9e393e0
This commit adds a separate protected resource page to demonstrate how to selectively require logins. Add code to improve client performance by providing modification timestamps and Cache-Control headers for embedded static files.
136 lines
3.6 KiB
Go
136 lines
3.6 KiB
Go
/*
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Copyright 2020-2023 CAcert Inc.
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SPDX-License-Identifier: Apache-2.0
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"bytes"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"github.com/gorilla/sessions"
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"github.com/nicksnyder/go-i18n/v2/i18n"
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log "github.com/sirupsen/logrus"
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"golang.org/x/oauth2"
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"code.cacert.org/cacert/oidc-demo-app/internal/models"
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"code.cacert.org/cacert/oidc-demo-app/internal/services"
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)
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const (
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oauth2RedirectStateLength = 8
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sessionName = "resource_app"
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)
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func Authenticate(logger *log.Logger, oauth2Config *oauth2.Config, clientID string) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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session, err := GetSession(r)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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if _, ok := session.Values[services.SessionIDToken]; ok {
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next.ServeHTTP(w, r)
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return
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}
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session.Values[services.SessionRedirectTarget] = r.URL.String()
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if err = session.Save(r, w); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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var authURL *url.URL
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if authURL, err = url.Parse(oauth2Config.Endpoint.AuthURL); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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queryValues := authURL.Query()
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queryValues.Set("client_id", clientID)
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queryValues.Set("response_type", "code")
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queryValues.Set("scope", "openid profile email cacert_groups")
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queryValues.Set("state", base64.URLEncoding.EncodeToString(services.GenerateKey(oauth2RedirectStateLength)))
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queryValues.Set("claims", getRequestedClaims(logger))
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authURL.RawQuery = queryValues.Encode()
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w.Header().Set("Location", authURL.String())
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w.WriteHeader(http.StatusFound)
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})
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}
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}
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func getRequestedClaims(logger *log.Logger) string {
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claims := make(models.OIDCClaimsRequest)
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claims["userinfo"] = make(models.ClaimElement)
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essentialItem := make(models.IndividualClaimRequest)
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essentialItem["essential"] = true
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claims["userinfo"]["https://auth.cacert.org/groups"] = &essentialItem
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target := make([]byte, 0)
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buf := bytes.NewBuffer(target)
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enc := json.NewEncoder(buf)
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if err := enc.Encode(claims); err != nil {
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logger.WithError(err).Warn("could not encode claims request parameter")
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}
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return buf.String()
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}
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func GetSession(r *http.Request) (*sessions.Session, error) {
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session, err := services.GetSessionStore().Get(r, sessionName)
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if err != nil {
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return nil, fmt.Errorf("could not get session")
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}
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return session, nil
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}
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type I18NHandler interface {
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GetBundle() *i18n.Bundle
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GetCatalog() *services.MessageCatalog
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}
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func GetLocalizer(h I18NHandler, r *http.Request) *i18n.Localizer {
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accept := r.Header.Get("Accept-Language")
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localizer := i18n.NewLocalizer(h.GetBundle(), accept)
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return localizer
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}
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func BaseTemplateData(h I18NHandler, localizer *i18n.Localizer) map[string]interface{} {
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msg := h.GetCatalog().LookupMessage
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data := map[string]interface{}{
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"WelcomeNavLabel": msg("IndexNavLabel", nil, localizer),
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"ProtectedNavLabel": msg("ProtectedNavLabel", nil, localizer),
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}
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return data
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}
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