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tangled.org
1package state
2
3import (
4 "bytes"
5 "crypto/hmac"
6 "crypto/sha256"
7 "encoding/hex"
8 "encoding/json"
9 "fmt"
10 "log"
11 "net/http"
12 "strings"
13 "time"
14
15 comatproto "github.com/bluesky-social/indigo/api/atproto"
16 lexutil "github.com/bluesky-social/indigo/lex/util"
17 "github.com/gliderlabs/ssh"
18 "github.com/go-chi/chi/v5"
19 "github.com/google/uuid"
20 tangled "github.com/sotangled/tangled/api/tangled"
21 "github.com/sotangled/tangled/appview"
22 "github.com/sotangled/tangled/appview/auth"
23 "github.com/sotangled/tangled/appview/db"
24 "github.com/sotangled/tangled/appview/pages"
25 "github.com/sotangled/tangled/rbac"
26)
27
28type State struct {
29 db *db.DB
30 auth *auth.Auth
31 enforcer *rbac.Enforcer
32}
33
34func Make() (*State, error) {
35
36 db, err := db.Make(appview.SqliteDbPath)
37 if err != nil {
38 return nil, err
39 }
40
41 auth, err := auth.Make()
42 if err != nil {
43 return nil, err
44 }
45
46 enforcer, err := rbac.NewEnforcer(appview.SqliteDbPath)
47 if err != nil {
48 return nil, err
49 }
50
51 return &State{db, auth, enforcer}, nil
52}
53
54func (s *State) Login(w http.ResponseWriter, r *http.Request) {
55 ctx := r.Context()
56
57 switch r.Method {
58 case http.MethodGet:
59 pages.Login(w, pages.LoginParams{})
60 return
61 case http.MethodPost:
62 handle := r.FormValue("handle")
63 appPassword := r.FormValue("app_password")
64
65 fmt.Println("handle", handle)
66 fmt.Println("app_password", appPassword)
67
68 resolved, err := auth.ResolveIdent(ctx, handle)
69 if err != nil {
70 log.Printf("resolving identity: %s", err)
71 http.Redirect(w, r, "/login", http.StatusSeeOther)
72 return
73 }
74
75 atSession, err := s.auth.CreateInitialSession(ctx, resolved, appPassword)
76 if err != nil {
77 log.Printf("creating initial session: %s", err)
78 return
79 }
80 sessionish := auth.CreateSessionWrapper{ServerCreateSession_Output: atSession}
81
82 err = s.auth.StoreSession(r, w, &sessionish, resolved.PDSEndpoint())
83 if err != nil {
84 log.Printf("storing session: %s", err)
85 return
86 }
87
88 log.Printf("successfully saved session for %s (%s)", atSession.Handle, atSession.Did)
89 http.Redirect(w, r, "/", http.StatusSeeOther)
90 return
91 }
92}
93
94func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
95 user := s.auth.GetUser(r)
96 pages.Timeline(w, pages.TimelineParams{
97 User: user,
98 })
99 return
100}
101
102// requires auth
103func (s *State) RegistrationKey(w http.ResponseWriter, r *http.Request) {
104 switch r.Method {
105 case http.MethodGet:
106 // list open registrations under this did
107
108 return
109 case http.MethodPost:
110 session, err := s.auth.Store.Get(r, appview.SessionName)
111 if err != nil || session.IsNew {
112 log.Println("unauthorized attempt to generate registration key")
113 http.Error(w, "Forbidden", http.StatusUnauthorized)
114 return
115 }
116
117 did := session.Values[appview.SessionDid].(string)
118
119 // check if domain is valid url, and strip extra bits down to just host
120 domain := r.FormValue("domain")
121 if domain == "" {
122 http.Error(w, "Invalid form", http.StatusBadRequest)
123 return
124 }
125
126 key, err := s.db.GenerateRegistrationKey(domain, did)
127
128 if err != nil {
129 log.Println(err)
130 http.Error(w, "unable to register this domain", http.StatusNotAcceptable)
131 return
132 }
133
134 w.Write([]byte(key))
135 }
136}
137
138func (s *State) Settings(w http.ResponseWriter, r *http.Request) {
139 // for now, this is just pubkeys
140 user := s.auth.GetUser(r)
141 pubKeys, err := s.db.GetPublicKeys(user.Did)
142 if err != nil {
143 log.Println(err)
144 }
145
146 pages.Settings(w, pages.SettingsParams{
147 User: user,
148 PubKeys: pubKeys,
149 })
150}
151
152func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
153 user := chi.URLParam(r, "user")
154 user = strings.TrimPrefix(user, "@")
155
156 if user == "" {
157 w.Write([]byte("not found"))
158 return
159 }
160
161 id, err := auth.ResolveIdent(r.Context(), user)
162 if err != nil {
163 w.Write([]byte("not found"))
164 return
165 }
166
167 pubKeys, err := s.db.GetPublicKeys(id.DID.String())
168 if err != nil {
169 w.Write([]byte("not found"))
170 return
171 }
172
173 for _, k := range pubKeys {
174 w.Write([]byte(fmt.Sprintln(k.Key)))
175 }
176}
177
178func (s *State) SettingsKeys(w http.ResponseWriter, r *http.Request) {
179 switch r.Method {
180 case http.MethodGet:
181 w.Write([]byte("unimplemented"))
182 log.Println("unimplemented")
183 return
184 case http.MethodPut:
185 did := s.auth.GetDid(r)
186 key := r.FormValue("key")
187 name := r.FormValue("name")
188 client, _ := s.auth.AuthorizedClient(r)
189
190 _, _, _, _, err := ssh.ParseAuthorizedKey([]byte(key))
191 if err != nil {
192 log.Printf("parsing public key: %s", err)
193 return
194 }
195
196 if err := s.db.AddPublicKey(did, name, key); err != nil {
197 log.Printf("adding public key: %s", err)
198 return
199 }
200
201 // store in pds too
202 resp, err := comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
203 Collection: tangled.PublicKeyNSID,
204 Repo: did,
205 Rkey: uuid.New().String(),
206 Record: &lexutil.LexiconTypeDecoder{
207 Val: &tangled.PublicKey{
208 Created: time.Now().Format(time.RFC3339),
209 Key: key,
210 Name: name,
211 }},
212 })
213 // invalid record
214 if err != nil {
215 log.Printf("failed to create record: %s", err)
216 return
217 }
218
219 log.Println("created atproto record: ", resp.Uri)
220
221 return
222 }
223}
224
225// create a signed request and check if a node responds to that
226func (s *State) InitKnotServer(w http.ResponseWriter, r *http.Request) {
227 user := s.auth.GetUser(r)
228
229 domain := chi.URLParam(r, "domain")
230 if domain == "" {
231 http.Error(w, "malformed url", http.StatusBadRequest)
232 return
233 }
234 log.Println("checking ", domain)
235
236 url := fmt.Sprintf("http://%s/init", domain)
237
238 body, _ := json.Marshal(map[string]interface{}{
239 "did": user.Did,
240 "keys": []string{},
241 })
242 pingRequest, err := http.NewRequest("POST", url, bytes.NewBuffer(body))
243 if err != nil {
244 log.Println("failed to build ping request", err)
245 return
246 }
247
248 secret, err := s.db.GetRegistrationKey(domain)
249 if err != nil {
250 log.Printf("no key found for domain %s: %s\n", domain, err)
251 return
252 }
253 client := SignedClient(secret)
254
255 resp, err := client.Do(pingRequest)
256 if err != nil {
257 w.Write([]byte("no dice"))
258 log.Println("domain was unreachable after 5 seconds")
259 return
260 }
261
262 if resp.StatusCode == http.StatusConflict {
263 log.Println("status conflict", resp.StatusCode)
264 w.Write([]byte("already registered, sorry!"))
265 return
266 }
267
268 if resp.StatusCode != http.StatusNoContent {
269 log.Println("status nok", resp.StatusCode)
270 w.Write([]byte("no dice"))
271 return
272 }
273
274 // verify response mac
275 signature := resp.Header.Get("X-Signature")
276 signatureBytes, err := hex.DecodeString(signature)
277 if err != nil {
278 return
279 }
280
281 expectedMac := hmac.New(sha256.New, []byte(secret))
282 expectedMac.Write([]byte("ok"))
283
284 if !hmac.Equal(expectedMac.Sum(nil), signatureBytes) {
285 log.Printf("response body signature mismatch: %x\n", signatureBytes)
286 return
287 }
288
289 // mark as registered
290 err = s.db.Register(domain)
291 if err != nil {
292 log.Println("failed to register domain", err)
293 http.Error(w, err.Error(), http.StatusInternalServerError)
294 return
295 }
296
297 // set permissions for this did as owner
298 reg, err := s.db.RegistrationByDomain(domain)
299 if err != nil {
300 log.Println("failed to register domain", err)
301 http.Error(w, err.Error(), http.StatusInternalServerError)
302 return
303 }
304
305 // add basic acls for this domain
306 err = s.enforcer.AddDomain(domain)
307 if err != nil {
308 log.Println("failed to setup owner of domain", err)
309 http.Error(w, err.Error(), http.StatusInternalServerError)
310 return
311 }
312
313 // add this did as owner of this domain
314 err = s.enforcer.AddOwner(domain, reg.ByDid)
315 if err != nil {
316 log.Println("failed to setup owner of domain", err)
317 http.Error(w, err.Error(), http.StatusInternalServerError)
318 return
319 }
320
321 w.Write([]byte("check success"))
322}
323
324func (s *State) KnotServerInfo(w http.ResponseWriter, r *http.Request) {
325 domain := chi.URLParam(r, "domain")
326 if domain == "" {
327 http.Error(w, "malformed url", http.StatusBadRequest)
328 return
329 }
330
331 user := s.auth.GetUser(r)
332 reg, err := s.db.RegistrationByDomain(domain)
333 if err != nil {
334 w.Write([]byte("failed to pull up registration info"))
335 return
336 }
337
338 var members []string
339 if reg.Registered != nil {
340 members, err = s.enforcer.E.GetUsersForRole("server:member", domain)
341 if err != nil {
342 w.Write([]byte("failed to fetch member list"))
343 return
344 }
345 }
346
347 ok, err := s.enforcer.E.HasGroupingPolicy(user.Did, "server:owner", domain)
348 isOwner := err == nil && ok
349
350 p := pages.KnotParams{
351 User: user,
352 Registration: reg,
353 Members: members,
354 IsOwner: isOwner,
355 }
356
357 pages.Knot(w, p)
358}
359
360// get knots registered by this user
361func (s *State) Knots(w http.ResponseWriter, r *http.Request) {
362 // for now, this is just pubkeys
363 user := s.auth.GetUser(r)
364 registrations, err := s.db.RegistrationsByDid(user.Did)
365 if err != nil {
366 log.Println(err)
367 }
368
369 pages.Knots(w, pages.KnotsParams{
370 User: user,
371 Registrations: registrations,
372 })
373}
374
375// list members of domain, requires auth and requires owner status
376func (s *State) ListMembers(w http.ResponseWriter, r *http.Request) {
377 domain := chi.URLParam(r, "domain")
378 if domain == "" {
379 http.Error(w, "malformed url", http.StatusBadRequest)
380 return
381 }
382
383 // list all members for this domain
384 memberDids, err := s.enforcer.E.GetUsersForRole("server:member", domain)
385 if err != nil {
386 w.Write([]byte("failed to fetch member list"))
387 return
388 }
389
390 w.Write([]byte(strings.Join(memberDids, "\n")))
391 return
392}
393
394// add member to domain, requires auth and requires invite access
395func (s *State) AddMember(w http.ResponseWriter, r *http.Request) {
396 domain := chi.URLParam(r, "domain")
397 if domain == "" {
398 http.Error(w, "malformed url", http.StatusBadRequest)
399 return
400 }
401
402 memberDid := r.FormValue("member")
403 if memberDid == "" {
404 http.Error(w, "malformed form", http.StatusBadRequest)
405 return
406 }
407
408 memberIdent, err := auth.ResolveIdent(r.Context(), memberDid)
409 if err != nil {
410 w.Write([]byte("failed to resolve member did to a handle"))
411 return
412 }
413 log.Printf("adding %s to %s\n", memberIdent.Handle.String(), domain)
414
415 // announce this relation into the firehose, store into owners' pds
416 client, _ := s.auth.AuthorizedClient(r)
417 currentUser := s.auth.GetUser(r)
418 addedAt := time.Now().Format(time.RFC3339)
419 resp, err := comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
420 Collection: tangled.KnotMemberNSID,
421 Repo: currentUser.Did,
422 Rkey: uuid.New().String(),
423 Record: &lexutil.LexiconTypeDecoder{
424 Val: &tangled.KnotMember{
425 Member: memberIdent.DID.String(),
426 Domain: domain,
427 AddedAt: &addedAt,
428 }},
429 })
430 // invalid record
431 if err != nil {
432 log.Printf("failed to create record: %s", err)
433 return
434 }
435
436 log.Println("created atproto record: ", resp.Uri)
437
438 err = s.enforcer.AddMember(domain, memberIdent.DID.String())
439 if err != nil {
440 w.Write([]byte(fmt.Sprint("failed to add member: ", err)))
441 return
442 }
443
444 w.Write([]byte(fmt.Sprint("added member: ", memberIdent.Handle.String())))
445}
446
447func (s *State) RemoveMember(w http.ResponseWriter, r *http.Request) {
448}
449
450func (s *State) AddRepo(w http.ResponseWriter, r *http.Request) {
451 switch r.Method {
452 case http.MethodGet:
453 pages.NewRepo(w, pages.NewRepoParams{
454 User: s.auth.GetUser(r),
455 })
456 case http.MethodPost:
457 user := s.auth.GetUser(r)
458
459 domain := r.FormValue("domain")
460 if domain == "" {
461 log.Println("invalid form")
462 return
463 }
464
465 repoName := r.FormValue("name")
466 if repoName == "" {
467 log.Println("invalid form")
468 return
469 }
470
471 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
472 if err != nil || !ok {
473 w.Write([]byte("domain inaccessible to you"))
474 return
475 }
476
477 secret, err := s.db.GetRegistrationKey(domain)
478 if err != nil {
479 log.Printf("no key found for domain %s: %s\n", domain, err)
480 return
481 }
482
483 client := SignedClient(secret)
484 url := fmt.Sprintf("http://%s/repo/new", domain)
485 body, _ := json.Marshal(map[string]interface{}{
486 "did": user.Did,
487 "name": repoName,
488 })
489 createRepoRequest, err := http.NewRequest("PUT", url, bytes.NewReader(body))
490
491 resp, err := client.Do(createRepoRequest)
492
493 if err != nil {
494 log.Println("failed to send create repo request", err)
495 return
496 }
497
498 if resp.StatusCode != http.StatusNoContent {
499 log.Println("server returned ", resp.StatusCode)
500 return
501 }
502
503 // add to local db
504 repo := &db.Repo{
505 Did: user.Did,
506 Name: repoName,
507 Knot: domain,
508 }
509
510 err = s.db.AddRepo(repo)
511 if err != nil {
512 log.Println("failed to add repo to db", err)
513 return
514 }
515
516 w.Write([]byte("created!"))
517 }
518}
519
520func (s *State) Router() http.Handler {
521 r := chi.NewRouter()
522
523 r.Get("/", s.Timeline)
524
525 r.Get("/login", s.Login)
526 r.Post("/login", s.Login)
527
528 r.Route("/knots", func(r chi.Router) {
529 r.Use(AuthMiddleware(s))
530 r.Get("/", s.Knots)
531 r.Post("/key", s.RegistrationKey)
532
533 r.Route("/{domain}", func(r chi.Router) {
534 r.Post("/init", s.InitKnotServer)
535 r.Get("/", s.KnotServerInfo)
536 r.Route("/member", func(r chi.Router) {
537 r.Use(RoleMiddleware(s, "server:owner"))
538 r.Get("/", s.ListMembers)
539 r.Put("/", s.AddMember)
540 r.Delete("/", s.RemoveMember)
541 })
542 })
543 })
544
545 r.Route("/repo", func(r chi.Router) {
546 r.Route("/new", func(r chi.Router) {
547 r.Get("/", s.AddRepo)
548 r.Post("/", s.AddRepo)
549 })
550 // r.Post("/import", s.ImportRepo)
551 })
552
553 r.Route("/settings", func(r chi.Router) {
554 r.Use(AuthMiddleware(s))
555 r.Get("/", s.Settings)
556 r.Put("/keys", s.SettingsKeys)
557 })
558
559 r.Get("/keys/{user}", s.Keys)
560
561 return r
562}