108 lines
3.3 KiB
Go
108 lines
3.3 KiB
Go
// Copyright 2020-2023 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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package pkce
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import (
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"context"
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"fmt"
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"time"
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"github.com/ory/fosite"
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"github.com/ory/fosite/handler/pkce"
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"k8s.io/apimachinery/pkg/api/errors"
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corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
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"go.pinniped.dev/internal/constable"
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"go.pinniped.dev/internal/crud"
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"go.pinniped.dev/internal/federationdomain/clientregistry"
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"go.pinniped.dev/internal/fositestorage"
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"go.pinniped.dev/internal/psession"
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)
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const (
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TypeLabelValue = "pkce"
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ErrInvalidPKCERequestVersion = constable.Error("pkce request data has wrong version")
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ErrInvalidPKCERequestData = constable.Error("pkce request data must be present")
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// Version 1 was the initial release of storage.
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// Version 2 is when we switched to storing psession.PinnipedSession inside the fosite request.
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// Version 3 is when we added the Username field to the psession.CustomSessionData.
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// Version 4 is when fosite added json tags to their openid.DefaultSession struct.
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// Version 5 is when we added the UpstreamUsername and UpstreamGroups fields to psession.CustomSessionData.
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pkceStorageVersion = "5"
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)
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var _ pkce.PKCERequestStorage = &pkceStorage{}
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type pkceStorage struct {
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storage crud.Storage
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}
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type session struct {
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Request *fosite.Request `json:"request"`
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Version string `json:"version"`
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}
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func New(secrets corev1client.SecretInterface, clock func() time.Time, sessionStorageLifetime time.Duration) pkce.PKCERequestStorage {
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return &pkceStorage{storage: crud.New(TypeLabelValue, secrets, clock, sessionStorageLifetime)}
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}
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func (a *pkceStorage) CreatePKCERequestSession(ctx context.Context, signature string, requester fosite.Requester) error {
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request, err := fositestorage.ValidateAndExtractAuthorizeRequest(requester)
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if err != nil {
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return err
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}
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_, err = a.storage.Create(ctx, signature, &session{Request: request, Version: pkceStorageVersion}, nil, nil)
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return err
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}
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func (a *pkceStorage) GetPKCERequestSession(ctx context.Context, signature string, _ fosite.Session) (fosite.Requester, error) {
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session, _, err := a.getSession(ctx, signature)
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if err != nil {
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return nil, err
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}
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return session.Request, err
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}
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func (a *pkceStorage) DeletePKCERequestSession(ctx context.Context, signature string) error {
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return a.storage.Delete(ctx, signature)
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}
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func (a *pkceStorage) getSession(ctx context.Context, signature string) (*session, string, error) {
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session := newValidEmptyPKCESession()
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rv, err := a.storage.Get(ctx, signature, session)
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if errors.IsNotFound(err) {
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return nil, "", fosite.ErrNotFound.WithWrap(err).WithDebug(err.Error())
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}
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if err != nil {
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return nil, "", fmt.Errorf("failed to get pkce session for %s: %w", signature, err)
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}
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if version := session.Version; version != pkceStorageVersion {
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return nil, "", fmt.Errorf("%w: pkce session for %s has version %s instead of %s",
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ErrInvalidPKCERequestVersion, signature, version, pkceStorageVersion)
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}
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if session.Request.ID == "" {
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return nil, "", fmt.Errorf("malformed pkce session for %s: %w", signature, ErrInvalidPKCERequestData)
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}
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return session, rv, nil
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}
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func newValidEmptyPKCESession() *session {
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return &session{
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Request: &fosite.Request{
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Client: &clientregistry.Client{},
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Session: &psession.PinnipedSession{},
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},
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}
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}
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