Repository navigation
Expand file tree
/
Copy pathauth-handler.go
More file actions
723 lines (647 loc) · 23.1 KB
/
Copy pathauth-handler.go
File metadata and controls
723 lines (647 loc) · 23.1 KB
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
// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"context"
"crypto/subtle"
"encoding/base64"
"encoding/hex"
"errors"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/minio/minio/internal/auth"
objectlock "github.com/minio/minio/internal/bucket/object/lock"
"github.com/minio/minio/internal/etag"
"github.com/minio/minio/internal/hash"
xhttp "github.com/minio/minio/internal/http"
xjwt "github.com/minio/minio/internal/jwt"
"github.com/minio/minio/internal/logger"
"github.com/minio/pkg/bucket/policy"
iampolicy "github.com/minio/pkg/iam/policy"
)
// Verify if request has JWT.
func isRequestJWT(r *http.Request) bool {
return strings.HasPrefix(r.Header.Get(xhttp.Authorization), jwtAlgorithm)
}
// Verify if request has AWS Signature Version '4'.
func isRequestSignatureV4(r *http.Request) bool {
return strings.HasPrefix(r.Header.Get(xhttp.Authorization), signV4Algorithm)
}
// Verify if request has AWS Signature Version '2'.
func isRequestSignatureV2(r *http.Request) bool {
return (!strings.HasPrefix(r.Header.Get(xhttp.Authorization), signV4Algorithm) &&
strings.HasPrefix(r.Header.Get(xhttp.Authorization), signV2Algorithm))
}
// Verify if request has AWS PreSign Version '4'.
func isRequestPresignedSignatureV4(r *http.Request) bool {
_, ok := r.Form[xhttp.AmzCredential]
return ok
}
// Verify request has AWS PreSign Version '2'.
func isRequestPresignedSignatureV2(r *http.Request) bool {
_, ok := r.Form[xhttp.AmzAccessKeyID]
return ok
}
// Verify if request has AWS Post policy Signature Version '4'.
func isRequestPostPolicySignatureV4(r *http.Request) bool {
return strings.Contains(r.Header.Get(xhttp.ContentType), "multipart/form-data") &&
r.Method == http.MethodPost
}
// Verify if the request has AWS Streaming Signature Version '4'. This is only valid for 'PUT' operation.
func isRequestSignStreamingV4(r *http.Request) bool {
return r.Header.Get(xhttp.AmzContentSha256) == streamingContentSHA256 &&
r.Method == http.MethodPut
}
// Authorization type.
//
//go:generate stringer -type=authType -trimprefix=authType $GOFILE
type authType int
// List of all supported auth types.
const (
authTypeUnknown authType = iota
authTypeAnonymous
authTypePresigned
authTypePresignedV2
authTypePostPolicy
authTypeStreamingSigned
authTypeSigned
authTypeSignedV2
authTypeJWT
authTypeSTS
)
// Get request authentication type.
func getRequestAuthType(r *http.Request) authType {
if r.URL != nil {
var err error
r.Form, err = url.ParseQuery(r.URL.RawQuery)
if err != nil {
logger.LogIf(r.Context(), err)
return authTypeUnknown
}
}
if isRequestSignatureV2(r) {
return authTypeSignedV2
} else if isRequestPresignedSignatureV2(r) {
return authTypePresignedV2
} else if isRequestSignStreamingV4(r) {
return authTypeStreamingSigned
} else if isRequestSignatureV4(r) {
return authTypeSigned
} else if isRequestPresignedSignatureV4(r) {
return authTypePresigned
} else if isRequestJWT(r) {
return authTypeJWT
} else if isRequestPostPolicySignatureV4(r) {
return authTypePostPolicy
} else if _, ok := r.Form[xhttp.Action]; ok {
return authTypeSTS
} else if _, ok := r.Header[xhttp.Authorization]; !ok {
return authTypeAnonymous
}
return authTypeUnknown
}
func validateAdminSignature(ctx context.Context, r *http.Request, region string) (auth.Credentials, map[string]interface{}, bool, APIErrorCode) {
var cred auth.Credentials
var owner bool
s3Err := ErrAccessDenied
if _, ok := r.Header[xhttp.AmzContentSha256]; ok &&
getRequestAuthType(r) == authTypeSigned {
// We only support admin credentials to access admin APIs.
cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
if s3Err != ErrNone {
return cred, nil, owner, s3Err
}
// we only support V4 (no presign) with auth body
s3Err = isReqAuthenticated(ctx, r, region, serviceS3)
}
if s3Err != ErrNone {
reqInfo := (&logger.ReqInfo{}).AppendTags("requestHeaders", dumpRequest(r))
ctx := logger.SetReqInfo(ctx, reqInfo)
logger.LogIf(ctx, errors.New(getAPIError(s3Err).Description), logger.Application)
return cred, nil, owner, s3Err
}
return cred, cred.Claims, owner, ErrNone
}
// checkAdminRequestAuth checks for authentication and authorization for the incoming
// request. It only accepts V2 and V4 requests. Presigned, JWT and anonymous requests
// are automatically rejected.
func checkAdminRequestAuth(ctx context.Context, r *http.Request, action iampolicy.AdminAction, region string) (auth.Credentials, APIErrorCode) {
cred, claims, owner, s3Err := validateAdminSignature(ctx, r, region)
if s3Err != ErrNone {
return cred, s3Err
}
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.Action(action),
ConditionValues: getConditionValues(r, "", cred.AccessKey, claims),
IsOwner: owner,
Claims: claims,
}) {
// Request is allowed return the appropriate access key.
return cred, ErrNone
}
return cred, ErrAccessDenied
}
// Fetch the security token set by the client.
func getSessionToken(r *http.Request) (token string) {
token = r.Header.Get(xhttp.AmzSecurityToken)
if token != "" {
return token
}
return r.Form.Get(xhttp.AmzSecurityToken)
}
// Fetch claims in the security token returned by the client, doesn't return
// errors - upon errors the returned claims map will be empty.
func mustGetClaimsFromToken(r *http.Request) map[string]interface{} {
claims, _ := getClaimsFromToken(getSessionToken(r))
return claims
}
func getClaimsFromTokenWithSecret(token, secret string) (map[string]interface{}, error) {
// JWT token for x-amz-security-token is signed with admin
// secret key, temporary credentials become invalid if
// server admin credentials change. This is done to ensure
// that clients cannot decode the token using the temp
// secret keys and generate an entirely new claim by essentially
// hijacking the policies. We need to make sure that this is
// based an admin credential such that token cannot be decoded
// on the client side and is treated like an opaque value.
claims, err := auth.ExtractClaims(token, secret)
if err != nil {
if subtle.ConstantTimeCompare([]byte(secret), []byte(globalActiveCred.SecretKey)) == 1 {
return nil, errAuthentication
}
claims, err = auth.ExtractClaims(token, globalActiveCred.SecretKey)
if err != nil {
return nil, errAuthentication
}
}
// If AuthZPlugin is set, return without any further checks.
if newGlobalAuthZPluginFn() != nil {
return claims.Map(), nil
}
// Check if a session policy is set. If so, decode it here.
sp, spok := claims.Lookup(iampolicy.SessionPolicyName)
if spok {
// Looks like subpolicy is set and is a string, if set then its
// base64 encoded, decode it. Decoding fails reject such
// requests.
spBytes, err := base64.StdEncoding.DecodeString(sp)
if err != nil {
// Base64 decoding fails, we should log to indicate
// something is malforming the request sent by client.
logger.LogIf(GlobalContext, err, logger.Application)
return nil, errAuthentication
}
claims.MapClaims[sessionPolicyNameExtracted] = string(spBytes)
}
return claims.Map(), nil
}
// Fetch claims in the security token returned by the client.
func getClaimsFromToken(token string) (map[string]interface{}, error) {
return getClaimsFromTokenWithSecret(token, globalActiveCred.SecretKey)
}
// Fetch claims in the security token returned by the client and validate the token.
func checkClaimsFromToken(r *http.Request, cred auth.Credentials) (map[string]interface{}, APIErrorCode) {
token := getSessionToken(r)
if token != "" && cred.AccessKey == "" {
// x-amz-security-token is not allowed for anonymous access.
return nil, ErrNoAccessKey
}
if token == "" && cred.IsTemp() {
// Temporary credentials should always have x-amz-security-token
return nil, ErrInvalidToken
}
if token != "" && !cred.IsTemp() {
// x-amz-security-token should not present for static credentials.
return nil, ErrInvalidToken
}
if cred.IsTemp() && subtle.ConstantTimeCompare([]byte(token), []byte(cred.SessionToken)) != 1 {
// validate token for temporary credentials only.
return nil, ErrInvalidToken
}
secret := globalActiveCred.SecretKey
if cred.IsServiceAccount() {
token = cred.SessionToken
secret = cred.SecretKey
}
if token != "" {
claims, err := getClaimsFromTokenWithSecret(token, secret)
if err != nil {
return nil, toAPIErrorCode(r.Context(), err)
}
return claims, ErrNone
}
claims := xjwt.NewMapClaims()
return claims.Map(), ErrNone
}
// Check request auth type verifies the incoming http request
// - validates the request signature
// - validates the policy action if anonymous tests bucket policies if any,
// for authenticated requests validates IAM policies.
//
// returns APIErrorCode if any to be replied to the client.
func checkRequestAuthType(ctx context.Context, r *http.Request, action policy.Action, bucketName, objectName string) (s3Err APIErrorCode) {
logger.GetReqInfo(ctx).BucketName = bucketName
logger.GetReqInfo(ctx).ObjectName = objectName
_, _, s3Err = checkRequestAuthTypeCredential(ctx, r, action)
return s3Err
}
func authenticateRequest(ctx context.Context, r *http.Request, action policy.Action) (s3Err APIErrorCode) {
if logger.GetReqInfo(ctx) == nil {
logger.LogIf(ctx, errors.New("unexpected context.Context does not have a logger.ReqInfo"), logger.Minio)
return ErrAccessDenied
}
var cred auth.Credentials
var owner bool
switch getRequestAuthType(r) {
case authTypeUnknown, authTypeStreamingSigned:
return ErrSignatureVersionNotSupported
case authTypePresignedV2, authTypeSignedV2:
if s3Err = isReqAuthenticatedV2(r); s3Err != ErrNone {
return s3Err
}
cred, owner, s3Err = getReqAccessKeyV2(r)
case authTypeSigned, authTypePresigned:
region := globalSite.Region
switch action {
case policy.GetBucketLocationAction, policy.ListAllMyBucketsAction:
region = ""
}
if s3Err = isReqAuthenticated(ctx, r, region, serviceS3); s3Err != ErrNone {
return s3Err
}
cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
}
if s3Err != ErrNone {
return s3Err
}
logger.GetReqInfo(ctx).Cred = cred
logger.GetReqInfo(ctx).Owner = owner
// region is valid only for CreateBucketAction.
var region string
if action == policy.CreateBucketAction {
// To extract region from XML in request body, get copy of request body.
payload, err := io.ReadAll(io.LimitReader(r.Body, maxLocationConstraintSize))
if err != nil {
logger.LogIf(ctx, err, logger.Application)
return ErrMalformedXML
}
// Populate payload to extract location constraint.
r.Body = io.NopCloser(bytes.NewReader(payload))
region, s3Err = parseLocationConstraint(r)
if s3Err != ErrNone {
return s3Err
}
// Populate payload again to handle it in HTTP handler.
r.Body = io.NopCloser(bytes.NewReader(payload))
}
logger.GetReqInfo(ctx).Region = region
return s3Err
}
func authorizeRequest(ctx context.Context, r *http.Request, action policy.Action) (s3Err APIErrorCode) {
reqInfo := logger.GetReqInfo(ctx)
if reqInfo == nil {
return ErrAccessDenied
}
cred := reqInfo.Cred
owner := reqInfo.Owner
region := reqInfo.Region
bucket := reqInfo.BucketName
object := reqInfo.ObjectName
if action != policy.ListAllMyBucketsAction && cred.AccessKey == "" {
// Anonymous checks are not meant for ListAllBuckets action
if globalPolicySys.IsAllowed(policy.Args{
AccountName: cred.AccessKey,
Action: action,
BucketName: bucket,
ConditionValues: getConditionValues(r, region, "", nil),
IsOwner:
8BD0
false,
ObjectName: object,
}) {
// Request is allowed return the appropriate access key.
return ErrNone
}
if action == policy.ListBucketVersionsAction {
// In AWS S3 s3:ListBucket permission is same as s3:ListBucketVersions permission
// verify as a fallback.
if globalPolicySys.IsAllowed(policy.Args{
AccountName: cred.AccessKey,
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, region, "", nil),
IsOwner: false,
ObjectName: object,
}) {
// Request is allowed return the appropriate access key.
return ErrNone
}
}
return ErrAccessDenied
}
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.Action(action),
BucketName: bucket,
ConditionValues: getConditionValues(r, "", cred.AccessKey, cred.Claims),
ObjectName: object,
IsOwner: owner,
Claims: cred.Claims,
}) {
// Request is allowed return the appropriate access key.
return ErrNone
}
if action == policy.ListBucketVersionsAction {
// In AWS S3 s3:ListBucket permission is same as s3:ListBucketVersions permission
// verify as a fallback.
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", cred.AccessKey, cred.Claims),
ObjectName: object,
IsOwner: owner,
Claims: cred.Claims,
}) {
// Request is allowed return the appropriate access key.
return ErrNone
}
}
return ErrAccessDenied
}
// Check request auth type verifies the incoming http request
// - validates the request signature
// - validates the policy action if anonymous tests bucket policies if any,
// for authenticated requests validates IAM policies.
//
// returns APIErrorCode if any to be replied to the client.
// Additionally returns the accessKey used in the request, and if this request is by an admin.
func checkRequestAuthTypeCredential(ctx context.Context, r *http.Request, action policy.Action) (cred auth.Credentials, owner bool, s3Err APIErrorCode) {
s3Err = authenticateRequest(ctx, r, action)
reqInfo := logger.GetReqInfo(ctx)
if reqInfo == nil {
return cred, owner, ErrAccessDenied
}
cred = reqInfo.Cred
owner = reqInfo.Owner
if s3Err != ErrNone {
return cred, owner, s3Err
}
return cred, owner, authorizeRequest(ctx, r, action)
}
// Verify if request has valid AWS Signature Version '2'.
func isReqAuthenticatedV2(r *http.Request) (s3Error APIErrorCode) {
if isRequestSignatureV2(r) {
return doesSignV2Match(r)
}
return doesPresignV2SignatureMatch(r)
}
func reqSignatureV4Verify(r *http.Request, region string, stype serviceType) (s3Error APIErrorCode) {
sha256sum := getContentSha256Cksum(r, stype)
switch {
case isRequestSignatureV4(r):
return doesSignatureMatch(sha256sum, r, region, stype)
case isRequestPresignedSignatureV4(r):
return doesPresignedSignatureMatch(sha256sum, r, region, stype)
default:
return ErrAccessDenied
}
}
// Verify if request has valid AWS Signature Version '4'.
func isReqAuthenticated(ctx context.Context, r *http.Request, region string, stype serviceType) (s3Error APIErrorCode) {
if errCode := reqSignatureV4Verify(r, region, stype); errCode != ErrNone {
return errCode
}
clientETag, err := etag.FromContentMD5(r.Header)
if err != nil {
return ErrInvalidDigest
}
// Extract either 'X-Amz-Content-Sha256' header or 'X-Amz-Content-Sha256' query parameter (if V4 presigned)
// Do not verify 'X-Amz-Content-Sha256' if skipSHA256.
var contentSHA256 []byte
if skipSHA256 := skipContentSha256Cksum(r); !skipSHA256 && isRequestPresignedSignatureV4(r) {
if sha256Sum, ok := r.Form[xhttp.AmzContentSha256]; ok && len(sha256Sum) > 0 {
contentSHA256, err = hex.DecodeString(sha256Sum[0])
if err != nil {
return ErrContentSHA256Mismatch
}
}
} else if _, ok := r.Header[xhttp.AmzContentSha256]; !skipSHA256 && ok {
contentSHA256, err = hex.DecodeString(r.Header.Get(xhttp.AmzContentSha256))
if err != nil || len(contentSHA256) == 0 {
return ErrContentSHA256Mismatch
}
}
// Verify 'Content-Md5' and/or 'X-Amz-Content-Sha256' if present.
// The verification happens implicit during reading.
reader, err := hash.NewReader(r.Body, -1, clientETag.String(), hex.EncodeToString(contentSHA256), -1)
if err != nil {
return toAPIErrorCode(ctx, err)
}
r.Body = reader
return ErrNone
}
// List of all support S3 auth types.
var supportedS3AuthTypes = map[authType]struct{}{
authTypeAnonymous: {},
authTypePresigned: {},
authTypePresignedV2: {},
authTypeSigned: {},
authTypeSignedV2: {},
authTypePostPolicy: {},
authTypeStreamingSigned: {},
}
// Validate if the authType is valid and supported.
func isSupportedS3AuthType(aType authType) bool {
_, ok := supportedS3AuthTypes[aType]
return ok
}
// setAuthHandler to validate authorization header for the incoming request.
func setAuthHandler(h http.Handler) http.Handler {
// handler for validating incoming authorization headers.
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tc, ok := r.Context().Value(contextTraceReqKey).(*traceCtxt)
aType := getRequestAuthType(r)
if aType == authTypeSigned || aType == authTypeSignedV2 || aType == authTypeStreamingSigned {
// Verify if date headers are set, if not reject the request
amzDate, errCode := parseAmzDateHeader(r)
if errCode != ErrNone {
if ok {
tc.funcName = "handler.Auth"
tc.responseRecorder.LogErrBody = true
}
// All our internal APIs are sensitive towards Date
// header, for all requests where Date header is not
// present we will reject such clients.
writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(errCode), r.URL)
atomic.AddUint64(&globalHTTPStats.rejectedRequestsTime, 1)
return
}
// Verify if the request date header is shifted by less than globalMaxSkewTime parameter in the past
// or in the future, reject request otherwise.
curTime := UTCNow()
if curTime.Sub(amzDate) > globalMaxSkewTime || amzDate.Sub(curTime) > globalMaxSkewTime {
if ok {
tc.funcName = "handler.Auth"
tc.responseRecorder.LogErrBody = true
}
writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrRequestTimeTooSkewed), r.URL)
atomic.AddUint64(&globalHTTPStats.rejectedRequestsTime, 1)
return
}
}
if isSupportedS3AuthType(aType) || aType == authTypeJWT || aType == authTypeSTS {
h.ServeHTTP(w, r)
return
}
if ok {
tc.funcName = "handler.Auth"
tc.responseRecorder.LogErrBody = true
}
writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrSignatureVersionNotSupported), r.URL)
atomic.AddUint64(&globalHTTPStats.rejectedRequestsAuth, 1)
})
}
func validateSignature(atype authType, r *http.Request) (auth.Credentials, bool, APIErrorCode) {
var cred auth.Credentials
var owner bool
var s3Err APIErrorCode
switch atype {
case authTypeUnknown, authTypeStreamingSigned:
return cred, owner, ErrSignatureVersionNotSupported
case authTypeSignedV2, authTypePresignedV2:
if s3Err = isReqAuthenticatedV2(r); s3Err != ErrNone {
return cred, owner, s3Err
}
cred, owner, s3Err = getReqAccessKeyV2(r)
case authTypePresigned, authTypeSigned:
region := globalSite.Region
if s3Err = isReqAuthenticated(GlobalContext, r, region, serviceS3); s3Err != ErrNone {
return cred, owner, s3Err
}
cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
}
if s3Err != ErrNone {
return cred, owner, s3Err
}
return cred, owner, ErrNone
}
func isPutRetentionAllowed(bucketName, objectName string, retDays int, retDate time.Time, retMode objectlock.RetMode, byPassSet bool, r *http.Request, cred auth.Credentials, owner bool) (s3Err APIErrorCode) {
var retSet bool
if cred.AccessKey == "" {
return ErrAccessDenied
}
conditions := getConditionValues(r, "", cred.AccessKey, cred.Claims)
conditions["object-lock-mode"] = []string{string(retMode)}
conditions["object-lock-retain-until-date"] = []string{retDate.Format(time.RFC3339)}
if retDays > 0 {
conditions["object-lock-remaining-retention-days"] = []string{strconv.Itoa(retDays)}
}
if retMode == objectlock.RetGovernance && byPassSet {
byPassSet = globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.BypassGovernanceRetentionAction,
BucketName: bucketName,
ObjectName: objectName,
ConditionValues: conditions,
IsOwner: owner,
Claims: cred.Claims,
})
}
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.PutObjectRetentionAction,
BucketName: bucketName,
ConditionValues: conditions,
ObjectName: objectName,
IsOwner: owner,
Claims: cred.Claims,
}) {
retSet = true
}
if byPassSet || retSet {
return ErrNone
}
return ErrAccessDenied
}
// isPutActionAllowed - check if PUT operation is allowed on the resource, this
// call verifies bucket policies and IAM policies, supports multi user
// checks etc.
func isPutActionAllowed(ctx context.Context, atype authType, bucketName, objectName string, r *http.Request, action iampolicy.Action) (s3Err APIErrorCode) {
var cred auth.Credentials
var owner bool
region := globalSite.Region
switch atype {
case authTypeUnknown:
return ErrSignatureVersionNotSupported
case authTypeSignedV2, authTypePresignedV2:
cred, owner, s3Err = getReqAccessKeyV2(r)
case authTypeStreamingSigned, authTypePresigned, authTypeSigned:
cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
}
if s3Err != ErrNone {
return s3Err
}
logger.GetReqInfo(ctx).Cred = cred
logger.GetReqInfo(ctx).Owner = owner
logger.GetReqInfo(ctx).Region = region
// Do not check for PutObjectRetentionAction permission,
// if mode and retain until date are not set.
// Can happen when bucket has default lock config set
if action == iampolicy.PutObjectRetentionAction &&
r.Header.Get(xhttp.AmzObjectLockMode) == "" &&
r.Header.Get(xhttp.AmzObjectLockRetainUntilDate) == "" {
return ErrNone
}
if cred.AccessKey == "" {
if globalPolicySys.IsAllowed(policy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: policy.Action(action),
BucketName: bucketName,
ConditionValues: getConditionValues(r, "", "", nil),
IsOwner: false,
ObjectName: objectName,
}) {
return ErrNone
}
return ErrAccessDenied
}
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: action,
BucketName: bucketName,
ConditionValues: getConditionValues(r, "", cred.AccessKey, cred.Claims),
ObjectName: objectName,
IsOwner: owner,
Claims: cred.Claims,
}) {
return ErrNone
}
return ErrAccessDenied
}