forked from hashicorp/vault
-
Notifications
You must be signed in to change notification settings - Fork 0
/
core.go
1852 lines (1570 loc) · 52.2 KB
/
core.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
package vault
import (
"crypto"
"crypto/ecdsa"
"crypto/subtle"
"crypto/x509"
"errors"
"fmt"
"net"
"net/http"
"net/url"
"path/filepath"
"sync"
"time"
"github.com/armon/go-metrics"
log "github.com/mgutz/logxi/v1"
"golang.org/x/net/context"
"google.golang.org/grpc"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/go-uuid"
"github.com/hashicorp/vault/audit"
"github.com/hashicorp/vault/helper/consts"
"github.com/hashicorp/vault/helper/errutil"
"github.com/hashicorp/vault/helper/jsonutil"
"github.com/hashicorp/vault/helper/logformat"
"github.com/hashicorp/vault/helper/mlock"
"github.com/hashicorp/vault/logical"
"github.com/hashicorp/vault/physical"
"github.com/hashicorp/vault/shamir"
cache "github.com/patrickmn/go-cache"
)
const (
// coreLockPath is the path used to acquire a coordinating lock
// for a highly-available deploy.
coreLockPath = "core/lock"
// The poison pill is used as a check during certain scenarios to indicate
// to standby nodes that they should seal
poisonPillPath = "core/poison-pill"
// coreLeaderPrefix is the prefix used for the UUID that contains
// the currently elected leader.
coreLeaderPrefix = "core/leader/"
// lockRetryInterval is the interval we re-attempt to acquire the
// HA lock if an error is encountered
lockRetryInterval = 10 * time.Second
// leaderCheckInterval is how often a standby checks for a new leader
leaderCheckInterval = 2500 * time.Millisecond
// keyRotateCheckInterval is how often a standby checks for a key
// rotation taking place.
keyRotateCheckInterval = 30 * time.Second
// keyRotateGracePeriod is how long we allow an upgrade path
// for standby instances before we delete the upgrade keys
keyRotateGracePeriod = 2 * time.Minute
// leaderPrefixCleanDelay is how long to wait between deletions
// of orphaned leader keys, to prevent slamming the backend.
leaderPrefixCleanDelay = 200 * time.Millisecond
// coreKeyringCanaryPath is used as a canary to indicate to replicated
// clusters that they need to perform a rekey operation synchronously; this
// isn't keyring-canary to avoid ignoring it when ignoring core/keyring
coreKeyringCanaryPath = "core/canary-keyring"
)
var (
// ErrAlreadyInit is returned if the core is already
// initialized. This prevents a re-initialization.
ErrAlreadyInit = errors.New("Vault is already initialized")
// ErrNotInit is returned if a non-initialized barrier
// is attempted to be unsealed.
ErrNotInit = errors.New("Vault is not initialized")
// ErrInternalError is returned when we don't want to leak
// any information about an internal error
ErrInternalError = errors.New("internal error")
// ErrHANotEnabled is returned if the operation only makes sense
// in an HA setting
ErrHANotEnabled = errors.New("Vault is not configured for highly-available mode")
// manualStepDownSleepPeriod is how long to sleep after a user-initiated
// step down of the active node, to prevent instantly regrabbing the lock.
// It's var not const so that tests can manipulate it.
manualStepDownSleepPeriod = 10 * time.Second
// Functions only in the Enterprise version
enterprisePostUnseal = enterprisePostUnsealImpl
enterprisePreSeal = enterprisePreSealImpl
startReplication = startReplicationImpl
stopReplication = stopReplicationImpl
LastRemoteWAL = lastRemoteWALImpl
)
// ReloadFunc are functions that are called when a reload is requested.
type ReloadFunc func(map[string]interface{}) error
// NonFatalError is an error that can be returned during NewCore that should be
// displayed but not cause a program exit
type NonFatalError struct {
Err error
}
func (e *NonFatalError) WrappedErrors() []error {
return []error{e.Err}
}
func (e *NonFatalError) Error() string {
return e.Err.Error()
}
// ErrInvalidKey is returned if there is a user-based error with a provided
// unseal key. This will be shown to the user, so should not contain
// information that is sensitive.
type ErrInvalidKey struct {
Reason string
}
func (e *ErrInvalidKey) Error() string {
return fmt.Sprintf("invalid key: %v", e.Reason)
}
type activeAdvertisement struct {
RedirectAddr string `json:"redirect_addr"`
ClusterAddr string `json:"cluster_addr,omitempty"`
ClusterCert []byte `json:"cluster_cert,omitempty"`
ClusterKeyParams *clusterKeyParams `json:"cluster_key_params,omitempty"`
}
type unlockInformation struct {
Parts [][]byte
Nonce string
}
// Core is used as the central manager of Vault activity. It is the primary point of
// interface for API handlers and is responsible for managing the logical and physical
// backends, router, security barrier, and audit trails.
type Core struct {
// N.B.: This is used to populate a dev token down replication, as
// otherwise, after replication is started, a dev would have to go through
// the generate-root process simply to talk to the new follower cluster.
devToken string
// HABackend may be available depending on the physical backend
ha physical.HABackend
// redirectAddr is the address we advertise as leader if held
redirectAddr string
// clusterAddr is the address we use for clustering
clusterAddr string
// physical backend is the un-trusted backend with durable data
physical physical.Backend
// Our Seal, for seal configuration information
seal Seal
// barrier is the security barrier wrapping the physical backend
barrier SecurityBarrier
// router is responsible for managing the mount points for logical backends.
router *Router
// logicalBackends is the mapping of backends to use for this core
logicalBackends map[string]logical.Factory
// credentialBackends is the mapping of backends to use for this core
credentialBackends map[string]logical.Factory
// auditBackends is the mapping of backends to use for this core
auditBackends map[string]audit.Factory
// stateLock protects mutable state
stateLock sync.RWMutex
sealed bool
standby bool
standbyDoneCh chan struct{}
standbyStopCh chan struct{}
manualStepDownCh chan struct{}
// unlockInfo has the keys provided to Unseal until the threshold number of parts is available, as well as the operation nonce
unlockInfo *unlockInformation
// generateRootProgress holds the shares until we reach enough
// to verify the master key
generateRootConfig *GenerateRootConfig
generateRootProgress [][]byte
generateRootLock sync.Mutex
// These variables holds the config and shares we have until we reach
// enough to verify the appropriate master key. Note that the same lock is
// used; this isn't time-critical so this shouldn't be a problem.
barrierRekeyConfig *SealConfig
barrierRekeyProgress [][]byte
recoveryRekeyConfig *SealConfig
recoveryRekeyProgress [][]byte
rekeyLock sync.RWMutex
// mounts is loaded after unseal since it is a protected
// configuration
mounts *MountTable
// mountsLock is used to ensure that the mounts table does not
// change underneath a calling function
mountsLock sync.RWMutex
// auth is loaded after unseal since it is a protected
// configuration
auth *MountTable
// authLock is used to ensure that the auth table does not
// change underneath a calling function
authLock sync.RWMutex
// audit is loaded after unseal since it is a protected
// configuration
audit *MountTable
// auditLock is used to ensure that the audit table does not
// change underneath a calling function
auditLock sync.RWMutex
// auditBroker is used to ingest the audit events and fan
// out into the configured audit backends
auditBroker *AuditBroker
// auditedHeaders is used to configure which http headers
// can be output in the audit logs
auditedHeaders *AuditedHeadersConfig
// systemBarrierView is the barrier view for the system backend
systemBarrierView *BarrierView
// expiration manager is used for managing LeaseIDs,
// renewal, expiration and revocation
expiration *ExpirationManager
// rollback manager is used to run rollbacks periodically
rollback *RollbackManager
// policy store is used to manage named ACL policies
policyStore *PolicyStore
// token store is used to manage authentication tokens
tokenStore *TokenStore
// metricsCh is used to stop the metrics streaming
metricsCh chan struct{}
// metricsMutex is used to prevent a race condition between
// metrics emission and sealing leading to a nil pointer
metricsMutex sync.Mutex
defaultLeaseTTL time.Duration
maxLeaseTTL time.Duration
logger log.Logger
// cachingDisabled indicates whether caches are disabled
cachingDisabled bool
// reloadFuncs is a map containing reload functions
reloadFuncs map[string][]ReloadFunc
// reloadFuncsLock controls access to the funcs
reloadFuncsLock sync.RWMutex
// wrappingJWTKey is the key used for generating JWTs containing response
// wrapping information
wrappingJWTKey *ecdsa.PrivateKey
//
// Cluster information
//
// Name
clusterName string
// Used to modify cluster parameters
clusterParamsLock sync.RWMutex
// The private key stored in the barrier used for establishing
// mutually-authenticated connections between Vault cluster members
localClusterPrivateKey crypto.Signer
// The local cluster cert
localClusterCert []byte
// The parsed form of the local cluster cert
localClusterParsedCert *x509.Certificate
// The TCP addresses we should use for clustering
clusterListenerAddrs []*net.TCPAddr
// The handler to use for request forwarding
clusterHandler http.Handler
// Tracks whether cluster listeners are running, e.g. it's safe to send a
// shutdown down the channel
clusterListenersRunning bool
// Shutdown channel for the cluster listeners
clusterListenerShutdownCh chan struct{}
// Shutdown success channel. We need this to be done serially to ensure
// that binds are removed before they might be reinstated.
clusterListenerShutdownSuccessCh chan struct{}
// Write lock used to ensure that we don't have multiple connections adjust
// this value at the same time
requestForwardingConnectionLock sync.RWMutex
// Most recent leader UUID. Used to avoid repeatedly JSON parsing the same
// values.
clusterLeaderUUID string
// Most recent leader redirect addr
clusterLeaderRedirectAddr string
// Lock for the cluster leader values
clusterLeaderParamsLock sync.RWMutex
// Info on cluster members
clusterPeerClusterAddrsCache *cache.Cache
// The grpc Server that handles server RPC calls
rpcServer *grpc.Server
// The context for the client
rpcClientConnContext context.Context
// The function for canceling the client connection
rpcClientConnCancelFunc context.CancelFunc
// The grpc ClientConn for RPC calls
rpcClientConn *grpc.ClientConn
// The grpc forwarding client
rpcForwardingClient *forwardingClient
// CORS Information
corsConfig *CORSConfig
// replicationState keeps the current replication state cached for quick
// lookup
replicationState consts.ReplicationState
// uiEnabled indicates whether Vault Web UI is enabled or not
uiEnabled bool
// pluginDirectory is the location vault will look for plugin binaries
pluginDirectory string
// pluginCatalog is used to manage plugin configurations
pluginCatalog *PluginCatalog
enableMlock bool
}
// CoreConfig is used to parameterize a core
type CoreConfig struct {
DevToken string `json:"dev_token" structs:"dev_token" mapstructure:"dev_token"`
LogicalBackends map[string]logical.Factory `json:"logical_backends" structs:"logical_backends" mapstructure:"logical_backends"`
CredentialBackends map[string]logical.Factory `json:"credential_backends" structs:"credential_backends" mapstructure:"credential_backends"`
AuditBackends map[string]audit.Factory `json:"audit_backends" structs:"audit_backends" mapstructure:"audit_backends"`
Physical physical.Backend `json:"physical" structs:"physical" mapstructure:"physical"`
// May be nil, which disables HA operations
HAPhysical physical.HABackend `json:"ha_physical" structs:"ha_physical" mapstructure:"ha_physical"`
Seal Seal `json:"seal" structs:"seal" mapstructure:"seal"`
Logger log.Logger `json:"logger" structs:"logger" mapstructure:"logger"`
// Disables the LRU cache on the physical backend
DisableCache bool `json:"disable_cache" structs:"disable_cache" mapstructure:"disable_cache"`
// Disables mlock syscall
DisableMlock bool `json:"disable_mlock" structs:"disable_mlock" mapstructure:"disable_mlock"`
// Custom cache size for the LRU cache on the physical backend, or zero for default
CacheSize int `json:"cache_size" structs:"cache_size" mapstructure:"cache_size"`
// Set as the leader address for HA
RedirectAddr string `json:"redirect_addr" structs:"redirect_addr" mapstructure:"redirect_addr"`
// Set as the cluster address for HA
ClusterAddr string `json:"cluster_addr" structs:"cluster_addr" mapstructure:"cluster_addr"`
DefaultLeaseTTL time.Duration `json:"default_lease_ttl" structs:"default_lease_ttl" mapstructure:"default_lease_ttl"`
MaxLeaseTTL time.Duration `json:"max_lease_ttl" structs:"max_lease_ttl" mapstructure:"max_lease_ttl"`
ClusterName string `json:"cluster_name" structs:"cluster_name" mapstructure:"cluster_name"`
EnableUI bool `json:"ui" structs:"ui" mapstructure:"ui"`
PluginDirectory string `json:"plugin_directory" structs:"plugin_directory" mapstructure:"plugin_directory"`
ReloadFuncs *map[string][]ReloadFunc
ReloadFuncsLock *sync.RWMutex
}
// NewCore is used to construct a new core
func NewCore(conf *CoreConfig) (*Core, error) {
if conf.HAPhysical != nil && conf.HAPhysical.HAEnabled() {
if conf.RedirectAddr == "" {
return nil, fmt.Errorf("missing redirect address")
}
}
if conf.DefaultLeaseTTL == 0 {
conf.DefaultLeaseTTL = defaultLeaseTTL
}
if conf.MaxLeaseTTL == 0 {
conf.MaxLeaseTTL = maxLeaseTTL
}
if conf.DefaultLeaseTTL > conf.MaxLeaseTTL {
return nil, fmt.Errorf("cannot have DefaultLeaseTTL larger than MaxLeaseTTL")
}
// Validate the advertise addr if its given to us
if conf.RedirectAddr != "" {
u, err := url.Parse(conf.RedirectAddr)
if err != nil {
return nil, fmt.Errorf("redirect address is not valid url: %s", err)
}
if u.Scheme == "" {
return nil, fmt.Errorf("redirect address must include scheme (ex. 'http')")
}
}
// Make a default logger if not provided
if conf.Logger == nil {
conf.Logger = logformat.NewVaultLogger(log.LevelTrace)
}
// Setup the core
c := &Core{
devToken: conf.DevToken,
physical: conf.Physical,
redirectAddr: conf.RedirectAddr,
clusterAddr: conf.ClusterAddr,
seal: conf.Seal,
router: NewRouter(),
sealed: true,
standby: true,
logger: conf.Logger,
defaultLeaseTTL: conf.DefaultLeaseTTL,
maxLeaseTTL: conf.MaxLeaseTTL,
cachingDisabled: conf.DisableCache,
clusterName: conf.ClusterName,
clusterListenerShutdownCh: make(chan struct{}),
clusterListenerShutdownSuccessCh: make(chan struct{}),
clusterPeerClusterAddrsCache: cache.New(3*heartbeatInterval, time.Second),
enableMlock: !conf.DisableMlock,
}
// Load CORS config and provide core
c.corsConfig = &CORSConfig{core: c}
// Wrap the physical backend in a cache layer if enabled and not already wrapped
if _, isCache := conf.Physical.(*physical.Cache); !conf.DisableCache && !isCache {
c.physical = physical.NewCache(conf.Physical, conf.CacheSize, conf.Logger)
}
if !conf.DisableMlock {
// Ensure our memory usage is locked into physical RAM
if err := mlock.LockMemory(); err != nil {
return nil, fmt.Errorf(
"Failed to lock memory: %v\n\n"+
"This usually means that the mlock syscall is not available.\n"+
"Vault uses mlock to prevent memory from being swapped to\n"+
"disk. This requires root privileges as well as a machine\n"+
"that supports mlock. Please enable mlock on your system or\n"+
"disable Vault from using it. To disable Vault from using it,\n"+
"set the `disable_mlock` configuration option in your configuration\n"+
"file.",
err)
}
}
var err error
if conf.PluginDirectory != "" {
c.pluginDirectory, err = filepath.Abs(conf.PluginDirectory)
if err != nil {
return nil, fmt.Errorf("core setup failed, could not verify plugin directory: %v", err)
}
}
// Construct a new AES-GCM barrier
c.barrier, err = NewAESGCMBarrier(c.physical)
if err != nil {
return nil, fmt.Errorf("barrier setup failed: %v", err)
}
if conf.HAPhysical != nil && conf.HAPhysical.HAEnabled() {
c.ha = conf.HAPhysical
}
// We create the funcs here, then populate the given config with it so that
// the caller can share state
conf.ReloadFuncsLock = &c.reloadFuncsLock
c.reloadFuncsLock.Lock()
c.reloadFuncs = make(map[string][]ReloadFunc)
c.reloadFuncsLock.Unlock()
conf.ReloadFuncs = &c.reloadFuncs
// Setup the backends
logicalBackends := make(map[string]logical.Factory)
for k, f := range conf.LogicalBackends {
logicalBackends[k] = f
}
_, ok := logicalBackends["generic"]
if !ok {
logicalBackends["generic"] = PassthroughBackendFactory
}
logicalBackends["cubbyhole"] = CubbyholeBackendFactory
logicalBackends["system"] = func(config *logical.BackendConfig) (logical.Backend, error) {
b := NewSystemBackend(c)
if err := b.Setup(config); err != nil {
return nil, err
}
return b, nil
}
c.logicalBackends = logicalBackends
credentialBackends := make(map[string]logical.Factory)
for k, f := range conf.CredentialBackends {
credentialBackends[k] = f
}
credentialBackends["token"] = func(config *logical.BackendConfig) (logical.Backend, error) {
return NewTokenStore(c, config)
}
c.credentialBackends = credentialBackends
auditBackends := make(map[string]audit.Factory)
for k, f := range conf.AuditBackends {
auditBackends[k] = f
}
c.auditBackends = auditBackends
if c.seal == nil {
c.seal = &DefaultSeal{}
}
c.seal.SetCore(c)
// Attempt unsealing with stored keys; if there are no stored keys this
// returns nil, otherwise returns nil or an error
storedKeyErr := c.UnsealWithStoredKeys()
return c, storedKeyErr
}
// Shutdown is invoked when the Vault instance is about to be terminated. It
// should not be accessible as part of an API call as it will cause an availability
// problem. It is only used to gracefully quit in the case of HA so that failover
// happens as quickly as possible.
func (c *Core) Shutdown() error {
c.stateLock.Lock()
defer c.stateLock.Unlock()
if c.sealed {
return nil
}
// Seal the Vault, causes a leader stepdown
return c.sealInternal()
}
// CORSConfig returns the current CORS configuration
func (c *Core) CORSConfig() *CORSConfig {
return c.corsConfig
}
// LookupToken returns the properties of the token from the token store. This
// is particularly useful to fetch the accessor of the client token and get it
// populated in the logical request along with the client token. The accessor
// of the client token can get audit logged.
func (c *Core) LookupToken(token string) (*TokenEntry, error) {
if token == "" {
return nil, fmt.Errorf("missing client token")
}
c.stateLock.RLock()
defer c.stateLock.RUnlock()
if c.sealed {
return nil, consts.ErrSealed
}
if c.standby {
return nil, consts.ErrStandby
}
// Many tests don't have a token store running
if c.tokenStore == nil {
return nil, nil
}
return c.tokenStore.Lookup(token)
}
func (c *Core) fetchACLandTokenEntry(req *logical.Request) (*ACL, *TokenEntry, error) {
defer metrics.MeasureSince([]string{"core", "fetch_acl_and_token"}, time.Now())
// Ensure there is a client token
if req.ClientToken == "" {
return nil, nil, fmt.Errorf("missing client token")
}
if c.tokenStore == nil {
c.logger.Error("core: token store is unavailable")
return nil, nil, ErrInternalError
}
// Resolve the token policy
te, err := c.tokenStore.Lookup(req.ClientToken)
if err != nil {
c.logger.Error("core: failed to lookup token", "error", err)
return nil, nil, ErrInternalError
}
// Ensure the token is valid
if te == nil {
return nil, nil, logical.ErrPermissionDenied
}
// Construct the corresponding ACL object
acl, err := c.policyStore.ACL(te.Policies...)
if err != nil {
c.logger.Error("core: failed to construct ACL", "error", err)
return nil, nil, ErrInternalError
}
return acl, te, nil
}
func (c *Core) checkToken(req *logical.Request) (*logical.Auth, *TokenEntry, error) {
defer metrics.MeasureSince([]string{"core", "check_token"}, time.Now())
acl, te, err := c.fetchACLandTokenEntry(req)
if err != nil {
return nil, te, err
}
// Check if this is a root protected path
rootPath := c.router.RootPath(req.Path)
// When we receive a write of either type, rather than require clients to
// PUT/POST and trust the operation, we ask the backend to give us the real
// skinny -- if the backend implements an existence check, it can tell us
// whether a particular resource exists. Then we can mark it as an update
// or creation as appropriate.
if req.Operation == logical.CreateOperation || req.Operation == logical.UpdateOperation {
checkExists, resourceExists, err := c.router.RouteExistenceCheck(req)
switch err {
case logical.ErrUnsupportedPath:
// fail later via bad path to avoid confusing items in the log
checkExists = false
case nil:
// Continue on
default:
c.logger.Error("core: failed to run existence check", "error", err)
if _, ok := err.(errutil.UserError); ok {
return nil, nil, err
} else {
return nil, nil, ErrInternalError
}
}
switch {
case checkExists == false:
// No existence check, so always treate it as an update operation, which is how it is pre 0.5
req.Operation = logical.UpdateOperation
case resourceExists == true:
// It exists, so force an update operation
req.Operation = logical.UpdateOperation
case resourceExists == false:
// It doesn't exist, force a create operation
req.Operation = logical.CreateOperation
default:
panic("unreachable code")
}
}
// Create the auth response
auth := &logical.Auth{
ClientToken: req.ClientToken,
Accessor: req.ClientTokenAccessor,
Policies: te.Policies,
Metadata: te.Meta,
DisplayName: te.DisplayName,
}
// Check the standard non-root ACLs. Return the token entry if it's not
// allowed so we can decrement the use count.
allowed, rootPrivs := acl.AllowOperation(req)
if !allowed {
// Return auth for audit logging even if not allowed
return auth, te, logical.ErrPermissionDenied
}
if rootPath && !rootPrivs {
// Return auth for audit logging even if not allowed
return auth, te, logical.ErrPermissionDenied
}
return auth, te, nil
}
// Sealed checks if the Vault is current sealed
func (c *Core) Sealed() (bool, error) {
c.stateLock.RLock()
defer c.stateLock.RUnlock()
return c.sealed, nil
}
// Standby checks if the Vault is in standby mode
func (c *Core) Standby() (bool, error) {
c.stateLock.RLock()
defer c.stateLock.RUnlock()
return c.standby, nil
}
// Leader is used to get the current active leader
func (c *Core) Leader() (isLeader bool, leaderAddr string, err error) {
c.stateLock.RLock()
defer c.stateLock.RUnlock()
// Check if sealed
if c.sealed {
return false, "", consts.ErrSealed
}
// Check if HA enabled
if c.ha == nil {
return false, "", ErrHANotEnabled
}
// Check if we are the leader
if !c.standby {
return true, c.redirectAddr, nil
}
// Initialize a lock
lock, err := c.ha.LockWith(coreLockPath, "read")
if err != nil {
return false, "", err
}
// Read the value
held, leaderUUID, err := lock.Value()
if err != nil {
return false, "", err
}
if !held {
return false, "", nil
}
c.clusterLeaderParamsLock.RLock()
localLeaderUUID := c.clusterLeaderUUID
localRedirAddr := c.clusterLeaderRedirectAddr
c.clusterLeaderParamsLock.RUnlock()
// If the leader hasn't changed, return the cached value; nothing changes
// mid-leadership, and the barrier caches anyways
if leaderUUID == localLeaderUUID && localRedirAddr != "" {
return false, localRedirAddr, nil
}
c.logger.Trace("core: found new active node information, refreshing")
c.clusterLeaderParamsLock.Lock()
defer c.clusterLeaderParamsLock.Unlock()
// Validate base conditions again
if leaderUUID == c.clusterLeaderUUID && c.clusterLeaderRedirectAddr != "" {
return false, localRedirAddr, nil
}
key := coreLeaderPrefix + leaderUUID
entry, err := c.barrier.Get(key)
if err != nil {
return false, "", err
}
if entry == nil {
return false, "", nil
}
var oldAdv bool
var adv activeAdvertisement
err = jsonutil.DecodeJSON(entry.Value, &adv)
if err != nil {
// Fall back to pre-struct handling
adv.RedirectAddr = string(entry.Value)
c.logger.Trace("core: parsed redirect addr for new active node", "redirect_addr", adv.RedirectAddr)
oldAdv = true
}
if !oldAdv {
c.logger.Trace("core: parsing information for new active node", "active_cluster_addr", adv.ClusterAddr, "active_redirect_addr", adv.RedirectAddr)
// Ensure we are using current values
err = c.loadLocalClusterTLS(adv)
if err != nil {
return false, "", err
}
// This will ensure that we both have a connection at the ready and that
// the address is the current known value
err = c.refreshRequestForwardingConnection(adv.ClusterAddr)
if err != nil {
return false, "", err
}
}
// Don't set these until everything has been parsed successfully or we'll
// never try again
c.clusterLeaderRedirectAddr = adv.RedirectAddr
c.clusterLeaderUUID = leaderUUID
return false, adv.RedirectAddr, nil
}
// SecretProgress returns the number of keys provided so far
func (c *Core) SecretProgress() (int, string) {
c.stateLock.RLock()
defer c.stateLock.RUnlock()
switch c.unlockInfo {
case nil:
return 0, ""
default:
return len(c.unlockInfo.Parts), c.unlockInfo.Nonce
}
}
// ResetUnsealProcess removes the current unlock parts from memory, to reset
// the unsealing process
func (c *Core) ResetUnsealProcess() {
c.stateLock.Lock()
defer c.stateLock.Unlock()
if !c.sealed {
return
}
c.unlockInfo = nil
}
// Unseal is used to provide one of the key parts to unseal the Vault.
//
// They key given as a parameter will automatically be zerod after
// this method is done with it. If you want to keep the key around, a copy
// should be made.
func (c *Core) Unseal(key []byte) (bool, error) {
defer metrics.MeasureSince([]string{"core", "unseal"}, time.Now())
// Verify the key length
min, max := c.barrier.KeyLength()
max += shamir.ShareOverhead
if len(key) < min {
return false, &ErrInvalidKey{fmt.Sprintf("key is shorter than minimum %d bytes", min)}
}
if len(key) > max {
return false, &ErrInvalidKey{fmt.Sprintf("key is longer than maximum %d bytes", max)}
}
// Get the seal configuration
config, err := c.seal.BarrierConfig()
if err != nil {
return false, err
}
// Ensure the barrier is initialized
if config == nil {
return false, ErrNotInit
}
c.stateLock.Lock()
defer c.stateLock.Unlock()
// Check if already unsealed
if !c.sealed {
return true, nil
}
masterKey, err := c.unsealPart(config, key)
if err != nil {
return false, err
}
if masterKey != nil {
return c.unsealInternal(masterKey)
}
return false, nil
}
func (c *Core) unsealPart(config *SealConfig, key []byte) ([]byte, error) {
// Check if we already have this piece
if c.unlockInfo != nil {
for _, existing := range c.unlockInfo.Parts {
if subtle.ConstantTimeCompare(existing, key) == 1 {
return nil, nil
}
}
} else {
uuid, err := uuid.GenerateUUID()
if err != nil {
return nil, err
}
c.unlockInfo = &unlockInformation{
Nonce: uuid,
}
}
// Store this key
c.unlockInfo.Parts = append(c.unlockInfo.Parts, key)
// Check if we don't have enough keys to unlock
if len(c.unlockInfo.Parts) < config.SecretThreshold {
if c.logger.IsDebug() {
c.logger.Debug("core: cannot unseal, not enough keys", "keys", len(c.unlockInfo.Parts), "threshold", config.SecretThreshold, "nonce", c.unlockInfo.Nonce)
}
return nil, nil
}
// Best-effort memzero of unlock parts once we're done with them
defer func() {
for i, _ := range c.unlockInfo.Parts {
memzero(c.unlockInfo.Parts[i])
}
c.unlockInfo = nil
}()
// Recover the master key
var masterKey []byte
var err error
if config.SecretThreshold == 1 {
masterKey = make([]byte, len(c.unlockInfo.Parts[0]))
copy(masterKey, c.unlockInfo.Parts[0])
} else {
masterKey, err = shamir.Combine(c.unlockInfo.Parts)
if err != nil {
return nil, fmt.Errorf("failed to compute master key: %v", err)
}
}
return masterKey, nil
}
// This must be called with the state write lock held
func (c *Core) unsealInternal(masterKey []byte) (bool, error) {
defer memzero(masterKey)
// Attempt to unlock
if err := c.barrier.Unseal(masterKey); err != nil {
return false, err
}
if c.logger.IsInfo() {
c.logger.Info("core: vault is unsealed")
}
// Do post-unseal setup if HA is not enabled
if c.ha == nil {
// We still need to set up cluster info even if it's not part of a
// cluster right now. This also populates the cached cluster object.
if err := c.setupCluster(); err != nil {
c.logger.Error("core: cluster setup failed", "error", err)
c.barrier.Seal()
c.logger.Warn("core: vault is sealed")
return false, err
}
if err := c.postUnseal(); err != nil {
c.logger.Error("core: post-unseal setup failed", "error", err)
c.barrier.Seal()
c.logger.Warn("core: vault is sealed")
return false, err
}
c.standby = false
} else {
// Go to standby mode, wait until we are active to unseal
c.standbyDoneCh = make(chan struct{})
c.standbyStopCh = make(chan struct{})
c.manualStepDownCh = make(chan struct{})
go c.runStandby(c.standbyDoneCh, c.standbyStopCh, c.manualStepDownCh)
}
// Success!
c.sealed = false
if c.ha != nil {
sd, ok := c.ha.(physical.ServiceDiscovery)
if ok {
if err := sd.NotifySealedStateChange(); err != nil {
if c.logger.IsWarn() {
c.logger.Warn("core: failed to notify unsealed status", "error", err)
}
}
}
}
return true, nil
}
// SealWithRequest takes in a logical.Request, acquires the lock, and passes
// through to sealInternal
func (c *Core) SealWithRequest(req *logical.Request) error {