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
|
package s3api
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
xhttp "github.com/chrislusf/seaweedfs/weed/s3api/http"
"github.com/chrislusf/seaweedfs/weed/s3api/s3err"
"github.com/golang/protobuf/jsonpb"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/iam_pb"
)
type Action string
const (
ACTION_READ = "Read"
ACTION_WRITE = "Write"
ACTION_ADMIN = "Admin"
ACTION_TAGGING = "Tagging"
ACTION_LIST = "List"
)
type Iam interface {
Check(f http.HandlerFunc, actions ...Action) http.HandlerFunc
}
type IdentityAccessManagement struct {
identities []*Identity
domain string
}
type Identity struct {
Name string
Credentials []*Credential
Actions []Action
}
type Credential struct {
AccessKey string
SecretKey string
}
func NewIdentityAccessManagement(fileName string, domain string) *IdentityAccessManagement {
iam := &IdentityAccessManagement{
domain: domain,
}
if fileName == "" {
return iam
}
if err := iam.loadS3ApiConfiguration(fileName); err != nil {
glog.Fatalf("fail to load config file %s: %v", fileName, err)
}
return iam
}
func (iam *IdentityAccessManagement) loadS3ApiConfiguration(fileName string) error {
s3ApiConfiguration := &iam_pb.S3ApiConfiguration{}
rawData, readErr := ioutil.ReadFile(fileName)
if readErr != nil {
glog.Warningf("fail to read %s : %v", fileName, readErr)
return fmt.Errorf("fail to read %s : %v", fileName, readErr)
}
glog.V(1).Infof("load s3 config: %v", fileName)
if err := jsonpb.Unmarshal(bytes.NewReader(rawData), s3ApiConfiguration); err != nil {
glog.Warningf("unmarshal error: %v", err)
return fmt.Errorf("unmarshal %s error: %v", fileName, err)
}
for _, ident := range s3ApiConfiguration.Identities {
t := &Identity{
Name: ident.Name,
Credentials: nil,
Actions: nil,
}
for _, action := range ident.Actions {
t.Actions = append(t.Actions, Action(action))
}
for _, cred := range ident.Credentials {
t.Credentials = append(t.Credentials, &Credential{
AccessKey: cred.AccessKey,
SecretKey: cred.SecretKey,
})
}
iam.identities = append(iam.identities, t)
}
return nil
}
func (iam *IdentityAccessManagement) isEnabled() bool {
return len(iam.identities) > 0
}
func (iam *IdentityAccessManagement) lookupByAccessKey(accessKey string) (identity *Identity, cred *Credential, found bool) {
for _, ident := range iam.identities {
for _, cred := range ident.Credentials {
if cred.AccessKey == accessKey {
return ident, cred, true
}
}
}
return nil, nil, false
}
func (iam *IdentityAccessManagement) lookupAnonymous() (identity *Identity, found bool) {
for _, ident := range iam.identities {
if ident.Name == "anonymous" {
return ident, true
}
}
return nil, false
}
func (iam *IdentityAccessManagement) Auth(f http.HandlerFunc, action Action) http.HandlerFunc {
if !iam.isEnabled() {
return f
}
return func(w http.ResponseWriter, r *http.Request) {
identity, errCode := iam.authRequest(r, action)
if errCode == s3err.ErrNone {
if identity != nil && identity.Name != "" {
r.Header.Set(xhttp.AmzIdentityId, identity.Name)
if identity.isAdmin() {
r.Header.Set(xhttp.AmzIsAdmin, "true")
}
}
f(w, r)
return
}
writeErrorResponse(w, errCode, r.URL)
}
}
// check whether the request has valid access keys
func (iam *IdentityAccessManagement) authRequest(r *http.Request, action Action) (*Identity, s3err.ErrorCode) {
var identity *Identity
var s3Err s3err.ErrorCode
var found bool
switch getRequestAuthType(r) {
case authTypeStreamingSigned:
return identity, s3err.ErrNone
case authTypeUnknown:
glog.V(3).Infof("unknown auth type")
return identity, s3err.ErrAccessDenied
case authTypePresignedV2, authTypeSignedV2:
glog.V(3).Infof("v2 auth type")
identity, s3Err = iam.isReqAuthenticatedV2(r)
case authTypeSigned, authTypePresigned:
glog.V(3).Infof("v4 auth type")
identity, s3Err = iam.reqSignatureV4Verify(r)
case authTypePostPolicy:
glog.V(3).Infof("post policy auth type")
return identity, s3err.ErrNone
case authTypeJWT:
glog.V(3).Infof("jwt auth type")
return identity, s3err.ErrNotImplemented
case authTypeAnonymous:
identity, found = iam.lookupAnonymous()
if !found {
return identity, s3err.ErrAccessDenied
}
default:
return identity, s3err.ErrNotImplemented
}
glog.V(3).Infof("auth error: %v", s3Err)
if s3Err != s3err.ErrNone {
return identity, s3Err
}
glog.V(3).Infof("user name: %v actions: %v", identity.Name, identity.Actions)
bucket, _ := getBucketAndObject(r)
if !identity.canDo(action, bucket) {
return identity, s3err.ErrAccessDenied
}
return identity, s3err.ErrNone
}
func (identity *Identity) canDo(action Action, bucket string) bool {
if identity.isAdmin() {
return true
}
for _, a := range identity.Actions {
if a == action {
return true
}
}
if bucket == "" {
return false
}
limitedByBucket := string(action) + ":" + bucket
for _, a := range identity.Actions {
if string(a) == limitedByBucket {
return true
}
}
return false
}
func (identity *Identity) isAdmin() bool {
for _, a := range identity.Actions {
if a == "Admin" {
return true
}
}
return false
}
|
