-
Notifications
You must be signed in to change notification settings - Fork 97
/
handler.go
1157 lines (1006 loc) · 35.4 KB
/
handler.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package http
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"mime"
"net"
"net/http"
"net/http/pprof"
"net/textproto"
"net/url"
"os"
"regexp"
"strings"
"time"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/go-cleanhttp"
"github.com/hashicorp/go-secure-stdlib/parseutil"
"github.com/hashicorp/go-sockaddr"
"github.com/hashicorp/go-uuid"
gziphandler "github.com/klauspost/compress/gzhttp"
"github.com/openbao/openbao/helper/namespace"
"github.com/openbao/openbao/internalshared/configutil"
"github.com/openbao/openbao/sdk/v2/helper/consts"
"github.com/openbao/openbao/sdk/v2/helper/jsonutil"
"github.com/openbao/openbao/sdk/v2/helper/pathmanager"
"github.com/openbao/openbao/sdk/v2/logical"
"github.com/openbao/openbao/vault"
)
const (
// WrapTTLHeaderName is the name of the header containing a directive to
// wrap the response
WrapTTLHeaderName = "X-Vault-Wrap-TTL"
// WrapFormatHeaderName is the name of the header containing the format to
// wrap in; has no effect if the wrap TTL is not set
WrapFormatHeaderName = "X-Vault-Wrap-Format"
// NoRequestForwardingHeaderName is the name of the header telling Vault
// not to use request forwarding
NoRequestForwardingHeaderName = "X-Vault-No-Request-Forwarding"
// MFAHeaderName represents the HTTP header which carries the credentials
// required to perform MFA on any path.
MFAHeaderName = "X-Vault-MFA"
// canonicalMFAHeaderName is the MFA header value's format in the request
// headers. Do not alter the casing of this string.
canonicalMFAHeaderName = "X-Vault-Mfa"
// PolicyOverrideHeaderName is the header set to request overriding
// soft-mandatory Sentinel policies.
PolicyOverrideHeaderName = "X-Vault-Policy-Override"
// DefaultMaxRequestSize is the default maximum accepted request size. This
// is to prevent a denial of service attack where no Content-Length is
// provided and the server is fed ever more data until it exhausts memory.
// Can be overridden per listener.
DefaultMaxRequestSize = 32 * 1024 * 1024
)
var (
// Set to false by stub_asset if the ui build tag isn't enabled
uiBuiltIn = true
alwaysRedirectPaths = pathmanager.New()
injectDataIntoTopRoutes = []string{
"/v1/sys/audit",
"/v1/sys/audit/",
"/v1/sys/audit-hash/",
"/v1/sys/auth",
"/v1/sys/auth/",
"/v1/sys/config/cors",
"/v1/sys/config/auditing/request-headers/",
"/v1/sys/config/auditing/request-headers",
"/v1/sys/capabilities",
"/v1/sys/capabilities-accessor",
"/v1/sys/capabilities-self",
"/v1/sys/ha-status",
"/v1/sys/key-status",
"/v1/sys/mounts",
"/v1/sys/mounts/",
"/v1/sys/policy",
"/v1/sys/policy/",
"/v1/sys/rekey/backup",
"/v1/sys/rekey/recovery-key-backup",
"/v1/sys/remount",
"/v1/sys/rotate",
"/v1/sys/wrapping/wrap",
}
oidcProtectedPathRegex = regexp.MustCompile(`^identity/oidc/provider/\w(([\w-.]+)?\w)?/userinfo$`)
)
func init() {
alwaysRedirectPaths.AddPaths([]string{
"sys/storage/raft/snapshot",
"sys/storage/raft/snapshot-force",
})
}
type HandlerAnchor struct{}
func (h HandlerAnchor) Handler(props *vault.HandlerProperties) http.Handler {
return handler(props)
}
var Handler vault.HandlerHandler = HandlerAnchor{}
type HandlerFunc func(props *vault.HandlerProperties) http.Handler
func (h HandlerFunc) Handler(props *vault.HandlerProperties) http.Handler {
return h(props)
}
var _ vault.HandlerHandler = HandlerFunc(func(props *vault.HandlerProperties) http.Handler { return nil })
// handler returns an http.Handler for the API. This can be used on
// its own to mount the Vault API within another web server.
func handler(props *vault.HandlerProperties) http.Handler {
core := props.Core
// Create the muxer to handle the actual endpoints
mux := http.NewServeMux()
switch {
case props.RecoveryMode:
raw := vault.NewRawBackend(core)
strategy := vault.GenerateRecoveryTokenStrategy(props.RecoveryToken)
mux.Handle("/v1/sys/raw/", handleLogicalRecovery(raw, props.RecoveryToken))
mux.Handle("/v1/sys/generate-recovery-token/attempt", handleSysGenerateRootAttempt(core, strategy))
mux.Handle("/v1/sys/generate-recovery-token/update", handleSysGenerateRootUpdate(core, strategy))
default:
// Handle non-forwarded paths
mux.Handle("/v1/sys/config/state/", handleLogicalNoForward(core))
mux.Handle("/v1/sys/host-info", handleLogicalNoForward(core))
mux.Handle("/v1/sys/init", handleSysInit(core))
mux.Handle("/v1/sys/seal-status", handleSysSealStatus(core))
mux.Handle("/v1/sys/seal", handleSysSeal(core))
mux.Handle("/v1/sys/step-down", handleRequestForwarding(core, handleSysStepDown(core)))
mux.Handle("/v1/sys/unseal", handleSysUnseal(core))
mux.Handle("/v1/sys/leader", handleSysLeader(core))
mux.Handle("/v1/sys/health", handleSysHealth(core))
mux.Handle("/v1/sys/monitor", handleLogicalNoForward(core))
mux.Handle("/v1/sys/generate-root/attempt", handleRequestForwarding(core,
handleAuditNonLogical(core, handleSysGenerateRootAttempt(core, vault.GenerateStandardRootTokenStrategy))))
mux.Handle("/v1/sys/generate-root/update", handleRequestForwarding(core,
handleAuditNonLogical(core, handleSysGenerateRootUpdate(core, vault.GenerateStandardRootTokenStrategy))))
mux.Handle("/v1/sys/rekey/init", handleRequestForwarding(core, handleSysRekeyInit(core, false)))
mux.Handle("/v1/sys/rekey/update", handleRequestForwarding(core, handleSysRekeyUpdate(core, false)))
mux.Handle("/v1/sys/rekey/verify", handleRequestForwarding(core, handleSysRekeyVerify(core, false)))
mux.Handle("/v1/sys/rekey-recovery-key/init", handleRequestForwarding(core, handleSysRekeyInit(core, true)))
mux.Handle("/v1/sys/rekey-recovery-key/update", handleRequestForwarding(core, handleSysRekeyUpdate(core, true)))
mux.Handle("/v1/sys/rekey-recovery-key/verify", handleRequestForwarding(core, handleSysRekeyVerify(core, true)))
mux.Handle("/v1/sys/storage/raft/bootstrap", handleSysRaftBootstrap(core))
mux.Handle("/v1/sys/storage/raft/join", handleSysRaftJoin(core))
mux.Handle("/v1/sys/internal/ui/feature-flags", handleSysInternalFeatureFlags(core))
for _, path := range injectDataIntoTopRoutes {
mux.Handle(path, handleRequestForwarding(core, handleLogicalWithInjector(core)))
}
mux.Handle("/v1/sys/", handleRequestForwarding(core, handleLogical(core)))
mux.Handle("/v1/", handleRequestForwarding(core, handleLogical(core)))
if core.UIEnabled() {
if uiBuiltIn {
mux.Handle("/ui/", http.StripPrefix("/ui/", gziphandler.GzipHandler(handleUIHeaders(core, handleUI(http.FileServer(&UIAssetWrapper{FileSystem: assetFS()}))))))
mux.Handle("/robots.txt", gziphandler.GzipHandler(handleUIHeaders(core, handleUI(http.FileServer(&UIAssetWrapper{FileSystem: assetFS()})))))
} else {
mux.Handle("/ui/", handleUIHeaders(core, handleUIStub()))
}
mux.Handle("/ui", handleUIRedirect())
mux.Handle("/", handleUIRedirect())
}
// Register metrics path without authentication if enabled
if props.ListenerConfig != nil && props.ListenerConfig.Telemetry.UnauthenticatedMetricsAccess {
mux.Handle("/v1/sys/metrics", handleMetricsUnauthenticated(core))
} else {
mux.Handle("/v1/sys/metrics", handleLogicalNoForward(core))
}
if props.ListenerConfig != nil && props.ListenerConfig.Profiling.UnauthenticatedPProfAccess {
for _, name := range []string{"goroutine", "threadcreate", "heap", "allocs", "block", "mutex"} {
mux.Handle("/v1/sys/pprof/"+name, pprof.Handler(name))
}
mux.Handle("/v1/sys/pprof/", http.HandlerFunc(pprof.Index))
mux.Handle("/v1/sys/pprof/cmdline", http.HandlerFunc(pprof.Cmdline))
mux.Handle("/v1/sys/pprof/profile", http.HandlerFunc(pprof.Profile))
mux.Handle("/v1/sys/pprof/symbol", http.HandlerFunc(pprof.Symbol))
mux.Handle("/v1/sys/pprof/trace", http.HandlerFunc(pprof.Trace))
} else {
mux.Handle("/v1/sys/pprof/", handleLogicalNoForward(core))
}
if props.ListenerConfig != nil && props.ListenerConfig.InFlightRequestLogging.UnauthenticatedInFlightAccess {
mux.Handle("/v1/sys/in-flight-req", handleUnAuthenticatedInFlightRequest(core))
} else {
mux.Handle("/v1/sys/in-flight-req", handleLogicalNoForward(core))
}
additionalRoutes(mux, core)
}
// Wrap the handler in another handler to trigger all help paths.
helpWrappedHandler := wrapHelpHandler(mux, core)
corsWrappedHandler := wrapCORSHandler(helpWrappedHandler, core)
quotaWrappedHandler := rateLimitQuotaWrapping(corsWrappedHandler, core)
genericWrappedHandler := genericWrapping(core, quotaWrappedHandler, props)
wrappedHandler := wrapMaxRequestSizeHandler(genericWrappedHandler, props)
// Wrap the handler with PrintablePathCheckHandler to check for non-printable
// characters in the request path.
printablePathCheckHandler := wrappedHandler
if !props.DisablePrintableCheck {
printablePathCheckHandler = cleanhttp.PrintablePathCheckHandler(wrappedHandler, nil)
}
return printablePathCheckHandler
}
type copyResponseWriter struct {
wrapped http.ResponseWriter
statusCode int
body *bytes.Buffer
}
// newCopyResponseWriter returns an initialized newCopyResponseWriter
func newCopyResponseWriter(wrapped http.ResponseWriter) *copyResponseWriter {
w := ©ResponseWriter{
wrapped: wrapped,
body: new(bytes.Buffer),
statusCode: 200,
}
return w
}
func (w *copyResponseWriter) Header() http.Header {
return w.wrapped.Header()
}
func (w *copyResponseWriter) Write(buf []byte) (int, error) {
w.body.Write(buf)
return w.wrapped.Write(buf)
}
func (w *copyResponseWriter) WriteHeader(code int) {
w.statusCode = code
w.wrapped.WriteHeader(code)
}
func handleAuditNonLogical(core *vault.Core, h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
origBody := new(bytes.Buffer)
reader := io.NopCloser(io.TeeReader(r.Body, origBody))
r.Body = reader
req, _, status, err := buildLogicalRequestNoAuth(w, r)
if err != nil || status != 0 {
respondError(w, status, err)
return
}
if origBody != nil {
r.Body = io.NopCloser(origBody)
}
input := &logical.LogInput{
Request: req,
}
err = core.AuditLogger().AuditRequest(r.Context(), input)
if err != nil {
respondError(w, status, err)
return
}
cw := newCopyResponseWriter(w)
h.ServeHTTP(cw, r)
data := make(map[string]interface{})
err = jsonutil.DecodeJSON(cw.body.Bytes(), &data)
if err != nil {
// best effort, ignore
}
httpResp := &logical.HTTPResponse{Data: data, Headers: cw.Header()}
input.Response = logical.HTTPResponseToLogicalResponse(httpResp)
err = core.AuditLogger().AuditResponse(r.Context(), input)
if err != nil {
respondError(w, status, err)
}
return
})
}
// wrapGenericHandler wraps the handler with an extra layer of handler where
// tasks that should be commonly handled for all the requests and/or responses
// are performed.
func wrapGenericHandler(core *vault.Core, h http.Handler, props *vault.HandlerProperties) http.Handler {
var maxRequestDuration time.Duration
if props.ListenerConfig != nil {
maxRequestDuration = props.ListenerConfig.MaxRequestDuration
}
if maxRequestDuration == 0 {
maxRequestDuration = vault.DefaultMaxRequestDuration
}
// Swallow this error since we don't want to pollute the logs and we also don't want to
// return an HTTP error here. This information is best effort.
hostname, _ := os.Hostname()
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// This block needs to be here so that upon sending SIGHUP, custom response
// headers are also reloaded into the handlers.
var customHeaders map[string][]*logical.CustomHeader
if props.ListenerConfig != nil {
la := props.ListenerConfig.Address
listenerCustomHeaders := core.GetListenerCustomResponseHeaders(la)
if listenerCustomHeaders != nil {
customHeaders = listenerCustomHeaders.StatusCodeHeaderMap
}
}
// saving start time for the in-flight requests
inFlightReqStartTime := time.Now()
nw := logical.NewStatusHeaderResponseWriter(w, customHeaders)
// Set the Cache-Control header for all the responses returned
// by Vault
nw.Header().Set("Cache-Control", "no-store")
// Start with the request context
ctx := r.Context()
var cancelFunc context.CancelFunc
// Add our timeout, but not for the monitor or events endpoints, as they are streaming
if strings.HasSuffix(r.URL.Path, "sys/monitor") || strings.Contains(r.URL.Path, "sys/events") {
ctx, cancelFunc = context.WithCancel(ctx)
} else {
ctx, cancelFunc = context.WithTimeout(ctx, maxRequestDuration)
}
ctx = context.WithValue(ctx, "original_request_path", r.URL.Path)
r = r.WithContext(ctx)
r = r.WithContext(namespace.ContextWithNamespace(r.Context(), namespace.RootNamespace))
// Set some response headers with raft node id (if applicable) and hostname, if available
if core.RaftNodeIDHeaderEnabled() {
nodeID := core.GetRaftNodeID()
if nodeID != "" {
nw.Header().Set("X-Vault-Raft-Node-ID", nodeID)
}
}
if core.HostnameHeaderEnabled() && hostname != "" {
nw.Header().Set("X-Vault-Hostname", hostname)
}
switch {
case strings.HasPrefix(r.URL.Path, "/v1/"):
newR, status := adjustRequest(core, r)
if status != 0 {
respondError(nw, status, nil)
cancelFunc()
return
}
r = newR
case strings.HasPrefix(r.URL.Path, "/ui"), r.URL.Path == "/robots.txt", r.URL.Path == "/":
default:
respondError(nw, http.StatusNotFound, nil)
cancelFunc()
return
}
// The uuid for the request is going to be generated when a logical
// request is generated. But, here we generate one to be able to track
// in-flight requests, and use that to update the req data with clientID
inFlightReqID, err := uuid.GenerateUUID()
if err != nil {
respondError(nw, http.StatusInternalServerError, fmt.Errorf("failed to generate an identifier for the in-flight request"))
}
// adding an entry to the context to enable updating in-flight
// data with ClientID in the logical layer
r = r.WithContext(context.WithValue(r.Context(), logical.CtxKeyInFlightRequestID{}, inFlightReqID))
// extracting the client address to be included in the in-flight request
var clientAddr string
headers := r.Header[textproto.CanonicalMIMEHeaderKey("X-Forwarded-For")]
if len(headers) == 0 {
clientAddr = r.RemoteAddr
} else {
clientAddr = headers[0]
}
// getting the request method
requestMethod := r.Method
// Storing the in-flight requests. Path should include namespace as well
core.StoreInFlightReqData(
inFlightReqID,
vault.InFlightReqData{
StartTime: inFlightReqStartTime,
ReqPath: r.URL.Path,
ClientRemoteAddr: clientAddr,
Method: requestMethod,
})
defer func() {
// Not expecting this fail, so skipping the assertion check
core.FinalizeInFlightReqData(inFlightReqID, nw.StatusCode)
}()
// Setting the namespace in the header to be included in the error message
ns := r.Header.Get(consts.NamespaceHeaderName)
if ns != "" {
nw.Header().Set(consts.NamespaceHeaderName, ns)
}
h.ServeHTTP(nw, r)
cancelFunc()
return
})
}
func WrapForwardedForHandler(h http.Handler, l *configutil.Listener) http.Handler {
rejectNotPresent := l.XForwardedForRejectNotPresent
hopSkips := l.XForwardedForHopSkips
authorizedAddrs := l.XForwardedForAuthorizedAddrs
rejectNotAuthz := l.XForwardedForRejectNotAuthorized
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
headers, headersOK := r.Header[textproto.CanonicalMIMEHeaderKey("X-Forwarded-For")]
if !headersOK || len(headers) == 0 {
if !rejectNotPresent {
h.ServeHTTP(w, r)
return
}
respondError(w, http.StatusBadRequest, fmt.Errorf("missing x-forwarded-for header and configured to reject when not present"))
return
}
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
// If not rejecting treat it like we just don't have a valid
// header because we can't do a comparison against an address we
// can't understand
if !rejectNotPresent {
h.ServeHTTP(w, r)
return
}
respondError(w, http.StatusBadRequest, fmt.Errorf("error parsing client hostport: %w", err))
return
}
addr, err := sockaddr.NewIPAddr(host)
if err != nil {
// We treat this the same as the case above
if !rejectNotPresent {
h.ServeHTTP(w, r)
return
}
respondError(w, http.StatusBadRequest, fmt.Errorf("error parsing client address: %w", err))
return
}
var found bool
for _, authz := range authorizedAddrs {
if authz.Contains(addr) {
found = true
break
}
}
if !found {
// If we didn't find it and aren't configured to reject, simply
// don't trust it
if !rejectNotAuthz {
// We need to delete the X-Forwarded-For header before
// passing it along, otherwise downstream systems will not
// know whether or not to trust it.
r.Header.Del(textproto.CanonicalMIMEHeaderKey("X-Forwarded-For"))
// Now serve the request, having rejected the header.
h.ServeHTTP(w, r)
return
}
respondError(w, http.StatusBadRequest, fmt.Errorf("client address not authorized for x-forwarded-for and configured to reject connection"))
return
}
// At this point we have at least one value and it's authorized
// Split comma separated ones, which are common. This brings it in line
// to the multiple-header case.
var acc []string
for _, header := range headers {
vals := strings.Split(header, ",")
for _, v := range vals {
acc = append(acc, strings.TrimSpace(v))
}
}
indexToUse := int64(len(acc)) - 1 - hopSkips
if indexToUse < 0 {
// This is likely an error in either configuration or other
// infrastructure. We could either deny the request, or we
// could simply not trust the value. Denying the request is
// "safer" since if this logic is configured at all there may
// be an assumption it can always be trusted. Given that we can
// deny accepting the request at all if it's not from an
// authorized address, if we're at this point the address is
// authorized (or we've turned off explicit rejection) and we
// should assume that what comes in should be properly
// formatted.
respondError(w, http.StatusBadRequest, fmt.Errorf("malformed x-forwarded-for configuration or request, hops to skip (%d) would skip before earliest chain link (chain length %d)", hopSkips, len(headers)))
return
}
r.RemoteAddr = net.JoinHostPort(acc[indexToUse], port)
h.ServeHTTP(w, r)
return
})
}
// stripPrefix is a helper to strip a prefix from the path. It will
// return false from the second return value if it the prefix doesn't exist.
func stripPrefix(prefix, path string) (string, bool) {
if !strings.HasPrefix(path, prefix) {
return "", false
}
path = path[len(prefix):]
if path == "" {
return "", false
}
return path, true
}
func handleUIHeaders(core *vault.Core, h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
header := w.Header()
userHeaders, err := core.UIHeaders()
if err != nil {
respondError(w, http.StatusInternalServerError, err)
return
}
if userHeaders != nil {
for k := range userHeaders {
v := userHeaders.Get(k)
header.Set(k, v)
}
}
h.ServeHTTP(w, req)
})
}
func handleUI(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
// The fileserver handler strips trailing slashes and does a redirect.
// We don't want the redirect to happen so we preemptively trim the slash
// here.
req.URL.Path = strings.TrimSuffix(req.URL.Path, "/")
h.ServeHTTP(w, req)
return
})
}
func handleUIStub() http.Handler {
stubHTML := `
<!DOCTYPE html>
<html>
<style>
body {
color: #1F2124;
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
}
.wrapper {
display: flex;
justify-content: center;
align-items: center;
height: 500px;
}
.content ul {
line-height: 1.5;
}
a {
color: #1563ff;
text-decoration: none;
}
.header {
display: flex;
color: #6a7786;
align-items: center;
}
.header svg {
padding-right: 12px;
}
.alert {
transform: scale(0.07);
fill: #6a7786;
}
h1 {
font-weight: 500;
}
p {
margin-top: 0px;
}
</style>
<div class="wrapper">
<div class="content">
<div class="header">
<svg width="36px" height="36px" viewBox="0 0 36 36" xmlns="http:https://www.w3.org/2000/svg">
<path class="alert" d="M476.7 422.2L270.1 72.7c-2.9-5-8.3-8.7-14.1-8.7-5.9 0-11.3 3.7-14.1 8.7L35.3 422.2c-2.8 5-4.8 13-1.9 17.9 2.9 4.9 8.2 7.9 14 7.9h417.1c5.8 0 11.1-3 14-7.9 3-4.9 1-13-1.8-17.9zM288 400h-64v-48h64v48zm0-80h-64V176h64v144z"/>
</svg>
<h1>OpenBao UI is not available in this binary.</h1>
</div>
<p>To get the beta OpenBao UI do the following:</p>
<ul>
<li>Run <code>make dev-ui</code> to create a development binary with the UI.
</ul>
<p>Contributions to help improve the <a href="https://openbao.org/">OpenBao</a> UI are welcome!</p>
</div>
</div>
</html>
`
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte(stubHTML))
})
}
func handleUIRedirect() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
http.Redirect(w, req, "/ui/", 307)
return
})
}
type UIAssetWrapper struct {
FileSystem http.FileSystem
}
func (fsw *UIAssetWrapper) Open(name string) (http.File, error) {
file, err := fsw.FileSystem.Open(name)
if err == nil {
return file, nil
}
// serve index.html instead of 404ing
if errors.Is(err, fs.ErrNotExist) {
file, err := fsw.FileSystem.Open("index.html")
return file, err
}
return nil, err
}
func parseQuery(values url.Values) map[string]interface{} {
data := map[string]interface{}{}
for k, v := range values {
// Skip the help key as this is a reserved parameter
if k == "help" {
continue
}
switch {
case len(v) == 0:
case len(v) == 1:
data[k] = v[0]
default:
data[k] = v
}
}
if len(data) > 0 {
return data
}
return nil
}
func parseJSONRequest(r *http.Request, w http.ResponseWriter, out interface{}) (io.ReadCloser, error) {
// Limit the maximum number of bytes to MaxRequestSize to protect
// against an indefinite amount of data being read.
reader := r.Body
var origBody io.ReadWriter
err := jsonutil.DecodeJSONFromReader(reader, out)
if err != nil && err != io.EOF {
return nil, fmt.Errorf("failed to parse JSON input: %w", err)
}
if origBody != nil {
return io.NopCloser(origBody), err
}
return nil, err
}
// parseFormRequest parses values from a form POST.
//
// A nil map will be returned if the format is empty or invalid.
func parseFormRequest(r *http.Request) (map[string]interface{}, error) {
if err := r.ParseForm(); err != nil {
return nil, err
}
var data map[string]interface{}
if len(r.PostForm) != 0 {
data = make(map[string]interface{}, len(r.PostForm))
for k, v := range r.PostForm {
switch len(v) {
case 0:
case 1:
data[k] = v[0]
default:
// Almost anywhere taking in a string list can take in comma
// separated values, and really this is super niche anyways
data[k] = strings.Join(v, ",")
}
}
}
return data, nil
}
// handleRequestForwarding determines whether to forward a request or not,
// falling back on the older behavior of redirecting the client
func handleRequestForwarding(core *vault.Core, handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Note: in an HA setup, this call will also ensure that connections to
// the leader are set up, as that happens once the advertised cluster
// values are read during this function
isLeader, leaderAddr, _, err := core.Leader()
if err != nil {
if err == vault.ErrHANotEnabled {
// Standalone node, serve request normally
handler.ServeHTTP(w, r)
return
}
// Some internal error occurred
respondError(w, http.StatusInternalServerError, err)
return
}
if isLeader {
// No forwarding needed, we're leader
handler.ServeHTTP(w, r)
return
}
if leaderAddr == "" {
respondError(w, http.StatusInternalServerError, fmt.Errorf("local node not active but active cluster node not found"))
return
}
forwardRequest(core, w, r)
return
})
}
func forwardRequest(core *vault.Core, w http.ResponseWriter, r *http.Request) {
if r.Header.Get(vault.IntNoForwardingHeaderName) != "" {
respondStandby(core, w, r.URL)
return
}
if r.Header.Get(NoRequestForwardingHeaderName) != "" {
// Forwarding explicitly disabled, fall back to previous behavior
core.Logger().Debug("handleRequestForwarding: forwarding disabled by client request")
respondStandby(core, w, r.URL)
return
}
ns, err := namespace.FromContext(r.Context())
if err != nil {
respondError(w, http.StatusBadRequest, err)
return
}
path := ns.TrimmedPath(r.URL.Path[len("/v1/"):])
if alwaysRedirectPaths.HasPath(path) {
respondStandby(core, w, r.URL)
return
}
// Attempt forwarding the request. If we cannot forward -- perhaps it's
// been disabled on the active node -- this will return with an
// ErrCannotForward and we simply fall back
statusCode, header, retBytes, err := core.ForwardRequest(r)
if err != nil {
if err == vault.ErrCannotForward {
core.Logger().Debug("cannot forward request (possibly disabled on active node), falling back")
} else {
core.Logger().Error("forward request error", "error", err)
}
// Fall back to redirection
respondStandby(core, w, r.URL)
return
}
if header != nil {
for k, v := range header {
w.Header()[k] = v
}
}
w.WriteHeader(statusCode)
w.Write(retBytes)
}
// request is a helper to perform a request and properly exit in the
// case of an error.
func request(core *vault.Core, w http.ResponseWriter, rawReq *http.Request, r *logical.Request) (*logical.Response, bool, bool) {
resp, err := core.HandleRequest(rawReq.Context(), r)
if errwrap.Contains(err, consts.ErrStandby.Error()) {
respondStandby(core, w, rawReq.URL)
return resp, false, false
}
if err != nil && errwrap.Contains(err, logical.ErrPerfStandbyPleaseForward.Error()) {
return nil, false, true
}
if resp != nil && len(resp.Headers) > 0 {
// Set this here so it will take effect regardless of any other type of
// response processing
header := w.Header()
for k, v := range resp.Headers {
for _, h := range v {
header.Add(k, h)
}
}
switch {
case resp.Secret != nil,
resp.Auth != nil,
len(resp.Data) > 0,
resp.Redirect != "",
len(resp.Warnings) > 0,
resp.WrapInfo != nil:
// Nothing, resp has data
default:
// We have an otherwise totally empty response except for headers,
// so nil out the response now that the headers are written out
resp = nil
}
}
// If vault's core has already written to the response writer do not add any
// additional output. Headers have already been sent. If the response writer
// is set but has not been written to it likely means there was some kind of
// error
if r.ResponseWriter != nil && r.ResponseWriter.Written() {
return nil, true, false
}
if respondErrorCommon(w, r, resp, err) {
return resp, false, false
}
return resp, true, false
}
// respondStandby is used to trigger a redirect in the case that this Vault is currently a hot standby
func respondStandby(core *vault.Core, w http.ResponseWriter, reqURL *url.URL) {
// Request the leader address
_, redirectAddr, _, err := core.Leader()
if err != nil {
if err == vault.ErrHANotEnabled {
// Standalone node, serve 503
err = errors.New("node is not active")
respondError(w, http.StatusServiceUnavailable, err)
return
}
respondError(w, http.StatusInternalServerError, err)
return
}
// If there is no leader, generate a 503 error
if redirectAddr == "" {
err = errors.New("no active Vault instance found")
respondError(w, http.StatusServiceUnavailable, err)
return
}
// Parse the redirect location
redirectURL, err := url.Parse(redirectAddr)
if err != nil {
respondError(w, http.StatusInternalServerError, err)
return
}
// Generate a redirect URL
finalURL := url.URL{
Scheme: redirectURL.Scheme,
Host: redirectURL.Host,
Path: reqURL.Path,
RawQuery: reqURL.RawQuery,
}
// Ensure there is a scheme, default to https
if finalURL.Scheme == "" {
finalURL.Scheme = "https"
}
// If we have an address, redirect! We use a 307 code
// because we don't actually know if its permanent and
// the request method should be preserved.
w.Header().Set("Location", finalURL.String())
w.WriteHeader(307)
}
// getTokenFromReq parse headers of the incoming request to extract token if
// present it accepts Authorization Bearer (RFC6750) and X-Vault-Token header.
// Returns true if the token was sourced from a Bearer header.
func getTokenFromReq(r *http.Request) (string, bool) {
if token := r.Header.Get(consts.AuthHeaderName); token != "" {
return token, false
}
if headers, ok := r.Header["Authorization"]; ok {
// Reference for Authorization header format: https://tools.ietf.org/html/rfc7236#section-3
// If string does not start by 'Bearer ', it is not one we would use,
// but might be used by plugins
for _, v := range headers {
if !strings.HasPrefix(v, "Bearer ") {
continue
}
return strings.TrimSpace(v[7:]), true
}
}
return "", false
}
// requestAuth adds the token to the logical.Request if it exists.
func requestAuth(r *http.Request, req *logical.Request) {
// Attach the header value if we have it
token, fromAuthzHeader := getTokenFromReq(r)
if token != "" {
req.ClientToken = token
req.ClientTokenSource = logical.ClientTokenFromVaultHeader
if fromAuthzHeader {
req.ClientTokenSource = logical.ClientTokenFromAuthzHeader
}
}
}
func requestPolicyOverride(r *http.Request, req *logical.Request) error {
raw := r.Header.Get(PolicyOverrideHeaderName)
if raw == "" {
return nil
}
override, err := parseutil.ParseBool(raw)
if err != nil {
return err
}
req.PolicyOverride = override
return nil
}
// requestWrapInfo adds the WrapInfo value to the logical.Request if wrap info exists
func requestWrapInfo(r *http.Request, req *logical.Request) (*logical.Request, error) {
// First try for the header value
wrapTTL := r.Header.Get(WrapTTLHeaderName)
if wrapTTL == "" {
return req, nil
}
// If it has an allowed suffix parse as a duration string
dur, err := parseutil.ParseDurationSecond(wrapTTL)
if err != nil {
return req, err
}
if int64(dur) < 0 {
return req, fmt.Errorf("requested wrap ttl cannot be negative")
}
req.WrapInfo = &logical.RequestWrapInfo{
TTL: dur,
}
wrapFormat := r.Header.Get(WrapFormatHeaderName)
switch wrapFormat {
case "jwt":
req.WrapInfo.Format = "jwt"
}
return req, nil
}
// parseMFAHeader parses the MFAHeaderName in the request headers and organizes