dzming.li
A vibe coded tangled fork which supports pijul.
1package oauth
2
3import (
4 "bytes"
5 "context"
6 "encoding/json"
7 "errors"
8 "fmt"
9 "log/slog"
10 "net/http"
11 "slices"
12 "strings"
13 "time"
14
15 comatproto "github.com/bluesky-social/indigo/api/atproto"
16 "github.com/bluesky-social/indigo/atproto/auth/oauth"
17 lexutil "github.com/bluesky-social/indigo/lex/util"
18 "github.com/go-chi/chi/v5"
19 "github.com/posthog/posthog-go"
20 "tangled.org/core/api/tangled"
21 "tangled.org/core/appview/db"
22 "tangled.org/core/appview/models"
23 "tangled.org/core/consts"
24 "tangled.org/core/idresolver"
25 "tangled.org/core/orm"
26 "tangled.org/core/tid"
27)
28
29func (o *OAuth) Router() http.Handler {
30 r := chi.NewRouter()
31
32 r.Get("/oauth/client-metadata.json", o.clientMetadata)
33 r.Get("/oauth/jwks.json", o.jwks)
34 r.Get("/oauth/callback", o.Callback)
35 return r
36}
37
38func (o *OAuth) clientMetadata(w http.ResponseWriter, r *http.Request) {
39 doc := o.ClientApp.Config.ClientMetadata()
40 doc.JWKSURI = &o.JwksUri
41 doc.ClientName = &o.ClientName
42 doc.ClientURI = &o.ClientUri
43
44 w.Header().Set("Content-Type", "application/json")
45 if err := json.NewEncoder(w).Encode(doc); err != nil {
46 http.Error(w, err.Error(), http.StatusInternalServerError)
47 return
48 }
49}
50
51func (o *OAuth) jwks(w http.ResponseWriter, r *http.Request) {
52 w.Header().Set("Content-Type", "application/json")
53 body := o.ClientApp.Config.PublicJWKS()
54 if err := json.NewEncoder(w).Encode(body); err != nil {
55 http.Error(w, err.Error(), http.StatusInternalServerError)
56 return
57 }
58}
59
60func (o *OAuth) Callback(w http.ResponseWriter, r *http.Request) {
61 ctx := r.Context()
62 l := o.Logger.With("query", r.URL.Query())
63
64 authReturn := o.GetAuthReturn(r)
65 _ = o.ClearAuthReturn(w, r)
66
67 sessData, err := o.ClientApp.ProcessCallback(ctx, r.URL.Query())
68 if err != nil {
69 var callbackErr *oauth.AuthRequestCallbackError
70 if errors.As(err, &callbackErr) {
71 l.Debug("callback error", "err", callbackErr)
72 http.Redirect(w, r, fmt.Sprintf("/login?error=%s", callbackErr.ErrorCode), http.StatusFound)
73 return
74 }
75 l.Error("failed to process callback", "err", err)
76 http.Redirect(w, r, "/login?error=oauth", http.StatusFound)
77 return
78 }
79
80 if err := o.SaveSession(w, r, sessData); err != nil {
81 l.Error("failed to save session", "data", sessData, "err", err)
82 errorCode := "session"
83 if errors.Is(err, ErrMaxAccountsReached) {
84 errorCode = "max_accounts"
85 }
86 http.Redirect(w, r, fmt.Sprintf("/login?error=%s", errorCode), http.StatusFound)
87 return
88 }
89
90 o.Logger.Debug("session saved successfully")
91
92 go o.addToDefaultKnot(sessData.AccountDID.String())
93 go o.addToDefaultSpindle(sessData.AccountDID.String())
94 go o.ensureTangledProfile(sessData)
95 go o.autoClaimTnglShDomain(sessData.AccountDID.String())
96
97 if !o.Config.Core.Dev {
98 err = o.Posthog.Enqueue(posthog.Capture{
99 DistinctId: sessData.AccountDID.String(),
100 Event: "signin",
101 })
102 if err != nil {
103 o.Logger.Error("failed to enqueue posthog event", "err", err)
104 }
105 }
106
107 if authReturn == "" {
108 authReturn = "/"
109 }
110 http.Redirect(w, r, authReturn, http.StatusFound)
111}
112
113func (o *OAuth) addToDefaultSpindle(did string) {
114 l := o.Logger.With("subject", did)
115
116 // use the tangled.sh app password to get an accessJwt
117 // and create an sh.tangled.spindle.member record with that
118 spindleMembers, err := db.GetSpindleMembers(
119 o.Db,
120 orm.FilterEq("instance", "spindle.tangled.sh"),
121 orm.FilterEq("subject", did),
122 )
123 if err != nil {
124 l.Error("failed to get spindle members", "err", err)
125 return
126 }
127
128 if len(spindleMembers) != 0 {
129 l.Warn("already a member of the default spindle")
130 return
131 }
132
133 l.Debug("adding to default spindle")
134 session, err := o.getAppPasswordSession()
135 if err != nil {
136 l.Error("failed to create session", "err", err)
137 return
138 }
139
140 record := tangled.SpindleMember{
141 LexiconTypeID: tangled.SpindleMemberNSID,
142 Subject: did,
143 Instance: consts.DefaultSpindle,
144 CreatedAt: time.Now().Format(time.RFC3339),
145 }
146
147 if err := session.putRecord(record, tangled.SpindleMemberNSID); err != nil {
148 l.Error("failed to add to default spindle", "err", err)
149 return
150 }
151
152 l.Debug("successfully added to default spindle", "did", did)
153}
154
155func (o *OAuth) addToDefaultKnot(did string) {
156 l := o.Logger.With("subject", did)
157
158 // use the tangled.sh app password to get an accessJwt
159 // and create an sh.tangled.spindle.member record with that
160
161 allKnots, err := o.Enforcer.GetKnotsForUser(did)
162 if err != nil {
163 l.Error("failed to get knot members for did", "err", err)
164 return
165 }
166
167 if slices.Contains(allKnots, consts.DefaultKnot) {
168 l.Warn("already a member of the default knot")
169 return
170 }
171
172 l.Debug("adding to default knot")
173 session, err := o.getAppPasswordSession()
174 if err != nil {
175 l.Error("failed to create session", "err", err)
176 return
177 }
178
179 record := tangled.KnotMember{
180 LexiconTypeID: tangled.KnotMemberNSID,
181 Subject: did,
182 Domain: consts.DefaultKnot,
183 CreatedAt: time.Now().Format(time.RFC3339),
184 }
185
186 if err := session.putRecord(record, tangled.KnotMemberNSID); err != nil {
187 l.Error("failed to add to default knot", "err", err)
188 return
189 }
190
191 if err := o.Enforcer.AddKnotMember(consts.DefaultKnot, did); err != nil {
192 l.Error("failed to set up enforcer rules", "err", err)
193 return
194 }
195
196 l.Debug("successfully added to default knot")
197}
198
199func (o *OAuth) ensureTangledProfile(sessData *oauth.ClientSessionData) {
200 ctx := context.Background()
201 did := sessData.AccountDID.String()
202 l := o.Logger.With("did", did)
203
204 profile, _ := db.GetProfile(o.Db, did)
205 if profile != nil {
206 l.Debug("profile already exists in DB")
207 return
208 }
209
210 l.Debug("creating empty Tangled profile")
211
212 sess, err := o.ClientApp.ResumeSession(ctx, sessData.AccountDID, sessData.SessionID)
213 if err != nil {
214 l.Error("failed to resume session for profile creation", "err", err)
215 return
216 }
217 client := sess.APIClient()
218
219 _, err = comatproto.RepoPutRecord(ctx, client, &comatproto.RepoPutRecord_Input{
220 Collection: tangled.ActorProfileNSID,
221 Repo: did,
222 Rkey: "self",
223 Record: &lexutil.LexiconTypeDecoder{Val: &tangled.ActorProfile{}},
224 })
225
226 if err != nil {
227 l.Error("failed to create empty profile on PDS", "err", err)
228 return
229 }
230
231 tx, err := o.Db.BeginTx(ctx, nil)
232 if err != nil {
233 l.Error("failed to start transaction", "err", err)
234 return
235 }
236
237 emptyProfile := &models.Profile{Did: did}
238 if err := db.UpsertProfile(tx, emptyProfile); err != nil {
239 l.Error("failed to create empty profile in DB", "err", err)
240 return
241 }
242
243 l.Debug("successfully created empty Tangled profile on PDS and DB")
244}
245
246// create a AppPasswordSession using apppasswords
247type AppPasswordSession struct {
248 AccessJwt string `json:"accessJwt"`
249 RefreshJwt string `json:"refreshJwt"`
250 PdsEndpoint string
251 Did string
252 Logger *slog.Logger
253 ExpiresAt time.Time
254}
255
256func CreateAppPasswordSession(res *idresolver.Resolver, appPassword, did string, logger *slog.Logger) (*AppPasswordSession, error) {
257 if appPassword == "" {
258 return nil, fmt.Errorf("no app password configured")
259 }
260
261 resolved, err := res.ResolveIdent(context.Background(), did)
262 if err != nil {
263 return nil, fmt.Errorf("failed to resolve tangled.sh DID %s: %v", did, err)
264 }
265
266 pdsEndpoint := resolved.PDSEndpoint()
267 if pdsEndpoint == "" {
268 return nil, fmt.Errorf("no PDS endpoint found for tangled.sh DID %s", did)
269 }
270
271 sessionPayload := map[string]string{
272 "identifier": did,
273 "password": appPassword,
274 }
275 sessionBytes, err := json.Marshal(sessionPayload)
276 if err != nil {
277 return nil, fmt.Errorf("failed to marshal session payload: %v", err)
278 }
279
280 sessionURL := pdsEndpoint + "/xrpc/com.atproto.server.createSession"
281 sessionReq, err := http.NewRequestWithContext(context.Background(), "POST", sessionURL, bytes.NewBuffer(sessionBytes))
282 if err != nil {
283 return nil, fmt.Errorf("failed to create session request: %v", err)
284 }
285 sessionReq.Header.Set("Content-Type", "application/json")
286
287 logger.Debug("creating app password session", "url", sessionURL, "headers", sessionReq.Header)
288
289 client := &http.Client{Timeout: 30 * time.Second}
290 sessionResp, err := client.Do(sessionReq)
291 if err != nil {
292 return nil, fmt.Errorf("failed to create session: %v", err)
293 }
294 defer sessionResp.Body.Close()
295
296 if sessionResp.StatusCode != http.StatusOK {
297 return nil, fmt.Errorf("failed to create session: HTTP %d", sessionResp.StatusCode)
298 }
299
300 var session AppPasswordSession
301 if err := json.NewDecoder(sessionResp.Body).Decode(&session); err != nil {
302 return nil, fmt.Errorf("failed to decode session response: %v", err)
303 }
304
305 session.PdsEndpoint = pdsEndpoint
306 session.Did = did
307 session.Logger = logger
308 session.ExpiresAt = time.Now().Add(115 * time.Minute)
309
310 return &session, nil
311}
312
313func (s *AppPasswordSession) refreshSession() error {
314 refreshURL := s.PdsEndpoint + "/xrpc/com.atproto.server.refreshSession"
315 req, err := http.NewRequestWithContext(context.Background(), "POST", refreshURL, nil)
316 if err != nil {
317 return fmt.Errorf("failed to create refresh request: %w", err)
318 }
319
320 req.Header.Set("Authorization", "Bearer "+s.RefreshJwt)
321
322 s.Logger.Debug("refreshing app password session", "url", refreshURL)
323
324 client := &http.Client{Timeout: 30 * time.Second}
325 resp, err := client.Do(req)
326 if err != nil {
327 return fmt.Errorf("failed to refresh session: %w", err)
328 }
329 defer resp.Body.Close()
330
331 if resp.StatusCode != http.StatusOK {
332 var errorResponse map[string]any
333 if err := json.NewDecoder(resp.Body).Decode(&errorResponse); err != nil {
334 return fmt.Errorf("failed to refresh session: HTTP %d (failed to decode error response: %w)", resp.StatusCode, err)
335 }
336 errorBytes, _ := json.Marshal(errorResponse)
337 return fmt.Errorf("failed to refresh session: HTTP %d, response: %s", resp.StatusCode, string(errorBytes))
338 }
339
340 var refreshResponse struct {
341 AccessJwt string `json:"accessJwt"`
342 RefreshJwt string `json:"refreshJwt"`
343 }
344 if err := json.NewDecoder(resp.Body).Decode(&refreshResponse); err != nil {
345 return fmt.Errorf("failed to decode refresh response: %w", err)
346 }
347
348 s.AccessJwt = refreshResponse.AccessJwt
349 s.RefreshJwt = refreshResponse.RefreshJwt
350 // Set new expiry time with 5 minute buffer
351 s.ExpiresAt = time.Now().Add(115 * time.Minute)
352
353 s.Logger.Debug("successfully refreshed app password session")
354 return nil
355}
356
357func (s *AppPasswordSession) isValid() bool {
358 return time.Now().Before(s.ExpiresAt)
359}
360
361func (s *AppPasswordSession) putRecord(record any, collection string) error {
362 if !s.isValid() {
363 s.Logger.Debug("access token expired, refreshing session")
364 if err := s.refreshSession(); err != nil {
365 return fmt.Errorf("failed to refresh session: %w", err)
366 }
367 s.Logger.Debug("session refreshed")
368 }
369
370 recordBytes, err := json.Marshal(record)
371 if err != nil {
372 return fmt.Errorf("failed to marshal knot member record: %w", err)
373 }
374
375 payload := map[string]any{
376 "repo": s.Did,
377 "collection": collection,
378 "rkey": tid.TID(),
379 "record": json.RawMessage(recordBytes),
380 }
381
382 payloadBytes, err := json.Marshal(payload)
383 if err != nil {
384 return fmt.Errorf("failed to marshal request payload: %w", err)
385 }
386
387 url := s.PdsEndpoint + "/xrpc/com.atproto.repo.putRecord"
388 req, err := http.NewRequestWithContext(context.Background(), "POST", url, bytes.NewBuffer(payloadBytes))
389 if err != nil {
390 return fmt.Errorf("failed to create HTTP request: %w", err)
391 }
392
393 req.Header.Set("Content-Type", "application/json")
394 req.Header.Set("Authorization", "Bearer "+s.AccessJwt)
395
396 s.Logger.Debug("putting record", "url", url, "collection", collection)
397
398 client := &http.Client{Timeout: 30 * time.Second}
399 resp, err := client.Do(req)
400 if err != nil {
401 return fmt.Errorf("failed to add user to default service: %w", err)
402 }
403 defer resp.Body.Close()
404
405 if resp.StatusCode != http.StatusOK {
406 var errorResponse map[string]any
407 if err := json.NewDecoder(resp.Body).Decode(&errorResponse); err != nil {
408 return fmt.Errorf("failed to add user to default service: HTTP %d (failed to decode error response: %w)", resp.StatusCode, err)
409 }
410 return fmt.Errorf("failed to add user to default service: HTTP %d, response: %v", resp.StatusCode, errorResponse)
411 }
412
413 return nil
414}
415
416// autoClaimTnglShDomain checks if the user has a .tngl.sh handle and, if so,
417// ensures their corresponding sites domain is claimed. This is idempotent —
418// ClaimDomain is a no-op if the claim already exists.
419func (o *OAuth) autoClaimTnglShDomain(did string) {
420 l := o.Logger.With("did", did)
421
422 pdsDomain := strings.TrimPrefix(o.Config.Pds.Host, "https://")
423 pdsDomain = strings.TrimPrefix(pdsDomain, "http://")
424
425 resolved, err := o.IdResolver.ResolveIdent(context.Background(), did)
426 if err != nil {
427 l.Error("autoClaimTnglShDomain: failed to resolve ident", "err", err)
428 return
429 }
430
431 handle := resolved.Handle.String()
432 if !strings.HasSuffix(handle, "."+pdsDomain) {
433 return
434 }
435
436 if err := db.ClaimDomain(o.Db, did, handle); err != nil {
437 l.Warn("autoClaimTnglShDomain: failed to claim domain", "domain", handle, "err", err)
438 } else {
439 l.Info("autoClaimTnglShDomain: claimed domain", "domain", handle)
440 }
441}
442
443// getAppPasswordSession returns a cached AppPasswordSession, creating one if needed.
444func (o *OAuth) getAppPasswordSession() (*AppPasswordSession, error) {
445 o.appPasswordSessionMu.Lock()
446 defer o.appPasswordSessionMu.Unlock()
447
448 if o.appPasswordSession != nil {
449 return o.appPasswordSession, nil
450 }
451
452 session, err := CreateAppPasswordSession(o.IdResolver, o.Config.Core.AppPassword, consts.TangledDid, o.Logger)
453 if err != nil {
454 return nil, err
455 }
456
457 o.appPasswordSession = session
458 return session, nil
459}