Repository navigation
Expand file tree
/
Copy pathbucket-policy.go
More file actions
277 lines (241 loc) · 7.57 KB
/
Copy pathbucket-policy.go
File metadata and controls
277 lines (241 loc) · 7.57 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
// 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 (
"encoding/json"
"net/http"
"net/url"
"strconv"
"strings"
"time"
jsoniter "github.com/json-iterator/go"
miniogopolicy "github.com/minio/minio-go/v7/pkg/policy"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/internal/auth"
"github.com/minio/minio/internal/handlers"
xhttp "github.com/minio/minio/internal/http"
"github.com/minio/minio/internal/logger"
"github.com/minio/pkg/v2/policy"
)
// PolicySys - policy subsystem.
type PolicySys struct{}
// Get returns stored bucket policy
func (sys *PolicySys) Get(bucket string) (*policy.BucketPolicy, error) {
policy, _, err := globalBucketMetadataSys.GetPolicyConfig(bucket)
return policy, err
}
// IsAllowed - checks given policy args is allowed to continue the Rest API.
func (sys *PolicySys) IsAllowed(args policy.BucketPolicyArgs) bool {
p, err := sys.Get(args.BucketName)
if err == nil {
return p.IsAllowed(args)
}
// Log unhandled errors.
if _, ok := err.(BucketPolicyNotFound); !ok {
logger.LogIf(GlobalContext, err)
}
// As policy is not available for given bucket name, returns IsOwner i.e.
// operation is allowed only for owner.
return args.IsOwner
}
// NewPolicySys - creates new policy system.
func NewPolicySys() *PolicySys {
return &PolicySys{}
}
func getConditionValues(r *http.Request, lc string, cred auth.Credentials) map[string][]string {
currTime := UTCNow()
var (
username = cred.AccessKey
claims = cred.Claims
groups = cred.Groups
)
if cred.IsTemp() || cred.IsServiceAccount() {
// For derived credentials, check the parent user's permissions.
username = cred.ParentUser
}
principalType := "Anonymous"
if username != "" {
principalType = "User"
if len(claims) > 0 {
principalType = "AssumedRole"
}
if username == globalActiveCred.AccessKey {
principalType = "Account"
}
}
vid := r.Form.Get(xhttp.VersionID)
if vid == "" {
if u, err := url.Parse(r.Header.Get(xhttp.AmzCopySource)); err == nil {
vid = u.Query().Get(xhttp.VersionID)
}
}
authType := getRequestAuthType(r)
var signatureVersion string
switch authType {
case authTypeSignedV2, authTypePresignedV2:
signatureVersion = signV2Algorithm
case authTypeSigned, authTypePresigned, authTypeStreamingSigned, authTypePostPolicy:
signatureVersion = signV4Algorithm
}
var authtype string
switch authType {
case authTypePresignedV2, authTypePresigned:
authtype = "REST-QUERY-STRING"
case authTypeSignedV2, authTypeSigned, authTypeStreamingSigned:
authtype = "REST-HEADER"
case authTypePostPolicy:
authtype = "POST"
}
args := map[string][]string{
"CurrentTime": {currTime.Format(time.RFC3339)},
"EpochTime": {strconv.FormatInt(currTime.Unix(), 10)},
"SecureTransport": {strconv.FormatBool(r.TLS != nil)},
"SourceIp": {handlers.GetSourceIP(r)},
"UserAgent": {r.UserAgent()},
"Referer": {r.Referer()},
"principaltype": {principalType},
"userid": {username},
"username": {username},
"versionid": {vid},
"signatureversion": {signatureVersion},
"authType": {authtype},
}
if lc != "" {
args["LocationConstraint"] = []string{lc}
}
cloneHeader := r.Header.Clone()
if userTags := cloneHeader.Get(xhttp.AmzObjectTagging); userTags != "" {
tag, _ := tags.ParseObjectTags(userTags)
if tag != nil {
tagMap := tag.ToMap()
keys := make([]string, 0, len(tagMap))
for k, v := range tagMap {
args[pathJoin("ExistingObjectTag", k)] = []string{v}
args[pathJoin("RequestObjectTag", k)] = []string{v}
keys = append(keys, k)
}
args["RequestObjectTagKeys"] = keys
}
}
for _, objLock := range []string{
xhttp.AmzObjectLockMode,
xhttp.AmzObjectLockLegalHold,
xhttp.AmzObjectLockRetainUntilDate,
} {
if values, ok := cloneHeader[objLock]; ok {
args[strings.TrimPrefix(objLock, "X-Amz-")] = values
}
cloneHeader.Del(objLock)
}
for key, values := range cloneHeader {
if strings.EqualFold(key, xhttp.AmzObjectTagging) {
continue
}
if existingValues, found := args[key]; found {
args[key] = append(existingValues, values...)
} else {
args[key] = values
}
}
cloneURLValues := make(url.Values, len(r.Form))
for k, v := range r.Form {
cloneURLValues[k] = v
}
for _, objLock := range []string{
xhttp.AmzObjectLockMode,
xhttp.AmzObjectLockLegalHold,
xhttp.AmzObjectLockRetainUntilDate,
} {
if values, ok := cloneURLValues[objLock]; ok {
args[strings.TrimPrefix(objLock, "X-Amz-")] = values
}
cloneURLValues.Del(objLock)
}
for key, values := range cloneURLValues {
if existingValues, found := args[key]; found {
args[key] = append(existingValues, values...)
} else {
args[key] = values
}
}
// JWT specific values
//
// Add all string claims
for k, v := range claims {
vStr, ok := v.(string)
if ok {
// Trim any LDAP specific prefix
args[strings.ToLower(strings.TrimPrefix(k, "ldap"))] = []string{vStr}
}
}
// Add groups claim which could be a list. This will ensure that the claim
// `jwt:groups` works.
if grpsVal, ok := claims["groups"]; ok {
if grpsIs, ok := grpsVal.([]interface{}); ok {
grps := []string{}
for _, gI := range grpsIs {
if g, ok := gI.(string); ok {
grps = append(grps, g)
}
}
if len(grps) > 0 {
args["groups"] = grps
}
}
}
// if not claim groups are available use the one with auth.Credentials
if _, ok := args["groups"]; !ok {
if len(groups) > 0 {
args["groups"] = groups
}
}
return args
}
// PolicyToBucketAccessPolicy converts a MinIO policy into a minio-go policy data structure.
func PolicyToBucketAccessPolicy(bucketPolicy *policy.BucketPolicy) (*miniogopolicy.BucketAccessPolicy, error) {
// Return empty BucketAccessPolicy for empty bucket policy.
if bucketPolicy == nil {
return &miniogopolicy.BucketAccessPolicy{Version: policy.DefaultVersion}, nil
}
data, err := json.Marshal(bucketPolicy)
if err != nil {
// This should not happen because bucketPolicy is valid to convert to JSON data.
return nil, err
}
var policyInfo miniogopolicy.BucketAccessPolicy
json := jsoniter.ConfigCompatibleWithStandardLibrary
if err = json.Unmarshal(data, &policyInfo); err != nil {
// This should not happen because data is valid to JSON data.
return nil, err
}
return &policyInfo, nil
}
// BucketAccessPolicyToPolicy - converts minio-go/policy.BucketAccessPolicy to policy.BucketPolicy.
func BucketAccessPolicyToPolicy(policyInfo *miniogopolicy.BucketAccessPolicy) (*policy.BucketPolicy, error) {
data, err := json.Marshal(policyInfo)
if err != nil {
// This should not happen because policyInfo is valid to convert to JSON data.
return nil, err
}
var bucketPolicy policy.BucketPolicy
json := jsoniter.ConfigCompatibleWithStandardLibrary
if err = json.Unmarshal(data, &bucketPolicy); err != nil {
// This should not happen because data is valid to JSON data.
return nil, err
}
return &bucketPolicy, nil
}