chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/auth/openid/discovery_cache.go

@@ -0,0 +1,57 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package openid
+
+import (
+	"sync"
+	"time"
+
+	"github.com/yohcop/openid-go"
+)
+
+type timedDiscoveredInfo struct {
+	info openid.DiscoveredInfo
+	time time.Time
+}
+
+type timedDiscoveryCache struct {
+	cache map[string]timedDiscoveredInfo
+	ttl   time.Duration
+	mutex *sync.Mutex
+}
+
+func newTimedDiscoveryCache(ttl time.Duration) *timedDiscoveryCache {
+	return &timedDiscoveryCache{cache: map[string]timedDiscoveredInfo{}, ttl: ttl, mutex: &sync.Mutex{}}
+}
+
+func (s *timedDiscoveryCache) Put(id string, info openid.DiscoveredInfo) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	s.cache[id] = timedDiscoveredInfo{info: info, time: time.Now()}
+}
+
+// Delete timed-out cache entries
+func (s *timedDiscoveryCache) cleanTimedOut() {
+	now := time.Now()
+	for k, e := range s.cache {
+		diff := now.Sub(e.time)
+		if diff > s.ttl {
+			delete(s.cache, k)
+		}
+	}
+}
+
+func (s *timedDiscoveryCache) Get(id string) openid.DiscoveredInfo {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	// Delete old cached while we are at it.
+	s.cleanTimedOut()
+
+	if info, has := s.cache[id]; has {
+		return info.info
+	}
+	return nil
+}

modules/auth/openid/discovery_cache_test.go

@@ -0,0 +1,49 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package openid
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type testDiscoveredInfo struct{}
+
+func (s *testDiscoveredInfo) ClaimedID() string {
+	return "claimedID"
+}
+
+func (s *testDiscoveredInfo) OpEndpoint() string {
+	return "opEndpoint"
+}
+
+func (s *testDiscoveredInfo) OpLocalID() string {
+	return "opLocalID"
+}
+
+func TestTimedDiscoveryCache(t *testing.T) {
+	ttl := 50 * time.Millisecond
+	dc := newTimedDiscoveryCache(ttl)
+
+	// Put some initial values
+	dc.Put("foo", &testDiscoveredInfo{}) // openid.opEndpoint: "a", openid.opLocalID: "b", openid.claimedID: "c"})
+
+	// Make sure we can retrieve them
+	di := dc.Get("foo")
+	require.NotNil(t, di)
+	assert.Equal(t, "opEndpoint", di.OpEndpoint())
+	assert.Equal(t, "opLocalID", di.OpLocalID())
+	assert.Equal(t, "claimedID", di.ClaimedID())
+
+	// Attempt to get a non-existent value
+	assert.Nil(t, dc.Get("bar"))
+
+	// Sleep for a while and try to retrieve again
+	time.Sleep(ttl * 3 / 2)
+
+	assert.Nil(t, dc.Get("foo"))
+}

modules/auth/openid/openid.go

@@ -0,0 +1,55 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package openid
+
+import (
+	"net/http"
+	"sync"
+	"time"
+
+	"gitea.dev/modules/hostmatcher"
+	"gitea.dev/modules/proxy"
+	"gitea.dev/modules/setting"
+
+	"github.com/yohcop/openid-go"
+)
+
+// For the demo, we use in-memory infinite storage nonce and discovery
+// cache. In your app, do not use this as it will eat up memory and
+// never
+// free it. Use your own implementation, on a better database system.
+// If you have multiple servers for example, you may need to share at
+// least
+// the nonceStore between them.
+var (
+	nonceStore     = openid.NewSimpleNonceStore()
+	discoveryCache = newTimedDiscoveryCache(24 * time.Hour)
+
+	// openIDInstance does discovery/verification via an SSRF-protected client, so a user-supplied
+	// OpenID identifier can't reach internal/loopback/reserved addresses. It honors the operator's
+	// [security] ALLOWED_HOST_LIST (empty defaults to "external"), matching the avatar/webhook/migration
+	// clients, and validates the proxy path too. Lazy: reads proxy/settings once.
+	openIDInstance = sync.OnceValue(func() *openid.OpenID {
+		allowList := hostmatcher.ParseHostMatchList("security.ALLOWED_HOST_LIST", setting.Security.AllowedHostList)
+		return openid.NewOpenID(&http.Client{
+			Timeout:   30 * time.Second,
+			Transport: hostmatcher.NewHTTPTransport("openid", allowList, nil, proxy.Proxy(), setting.Proxy.ProxyURLFixed, nil),
+		})
+	})
+)
+
+// Verify handles response from OpenID provider
+func Verify(fullURL string) (id string, err error) {
+	return openIDInstance().Verify(fullURL, discoveryCache, nonceStore)
+}
+
+// Normalize normalizes an OpenID URI
+func Normalize(url string) (id string, err error) {
+	return openid.Normalize(url)
+}
+
+// RedirectURL redirects browser
+func RedirectURL(id, callbackURL, realm string) (string, error) {
+	return openIDInstance().RedirectURL(id, callbackURL, realm)
+}

modules/auth/openid/openid_test.go

@@ -0,0 +1,29 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package openid
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestOpenIDDiscoveryBlocksInternalHost(t *testing.T) {
+	var reached atomic.Bool
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		reached.Store(true)
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	// RedirectURL performs server-side discovery of the identifier URL; a loopback URL
+	// must be refused at dial time instead of reaching the internal server
+	_, err := RedirectURL(srv.URL, "http://example.com/callback", "http://example.com/")
+	require.Error(t, err)
+	assert.False(t, reached.Load(), "OpenID discovery must not reach an internal/loopback host")
+}