111 lines
3 KiB
Go
111 lines
3 KiB
Go
/*
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Copyright 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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"encoding/base64"
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"fmt"
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"log/slog"
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"net/http"
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"github.com/gorilla/sessions"
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"github.com/nicksnyder/go-i18n/v2/i18n"
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"golang.org/x/oauth2"
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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 *slog.Logger, oauth2Config *oauth2.Config) 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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logger.ErrorContext(r.Context(), "failed to get session", "error", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), 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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logger.ErrorContext(r.Context(), "failed to save session", "error", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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state, err := services.GenerateKey(oauth2RedirectStateLength)
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if err != nil {
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logger.ErrorContext(
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r.Context(), "failed to generate state for starting OIDC flow", "error", err,
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)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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}
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authURL := oauth2Config.AuthCodeURL(base64.URLEncoding.EncodeToString(state))
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w.Header().Set("Location", authURL)
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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 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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