forked from louketo/louketo-proxy
-
Notifications
You must be signed in to change notification settings - Fork 6
/
user_context.go
163 lines (144 loc) · 4.41 KB
/
user_context.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
/*
Copyright 2015 All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"fmt"
"strings"
"time"
"github.com/coreos/go-oidc/jose"
"github.com/coreos/go-oidc/oidc"
)
// extractIdentity parse the jwt token and extracts the various elements is order to construct
//
// This is function that concentrates keycloak dependencies (i.e. the structure of the token).
func extractIdentity(token jose.JWT) (*userContext, error) {
claims, err := token.Claims()
if err != nil {
return nil, err
}
identity, err := oidc.IdentityFromClaims(claims)
if err != nil {
return nil, err
}
// @step: ensure we have and can extract the preferred name of the user, if not, we set to the ID
preferredName, found, err := claims.StringClaim(claimPreferredName)
if err != nil || !found {
preferredName = identity.Email
}
var audiences []string
aud, found, err := claims.StringClaim(claimAudience)
if err == nil && found {
audiences = append(audiences, aud)
} else {
aud, found, erc := claims.StringsClaim(claimAudience)
if erc != nil || !found {
return nil, ErrNoTokenAudience
}
audiences = aud
}
// @step: extract the realm roles
var roleList []string
if realmRoles, found := claims[claimRealmAccess].(map[string]interface{}); found {
if rawRoles, found := realmRoles[claimResourceRoles]; found {
roles, ok := rawRoles.([]interface{})
if ok {
for _, r := range roles {
roleList = append(roleList, fmt.Sprintf("%s", r))
}
}
// invalid claim is ignored
}
}
// @step: extract the client roles from the access token
if accesses, found := claims[claimResourceAccess].(map[string]interface{}); found {
for name, list := range accesses {
scopes, isMap := list.(map[string]interface{})
if isMap {
if roles, found := scopes[claimResourceRoles]; found {
rolesForKey, isSlice := roles.([]interface{})
if isSlice {
for _, r := range rolesForKey {
roleList = append(roleList, fmt.Sprintf("%s:%s", name, r))
}
}
}
}
}
}
// @step: extract any group information from the tokens
groups, _, err := claims.StringsClaim(claimGroups)
if err != nil {
return nil, err
}
return &userContext{
audiences: audiences,
claims: claims,
email: identity.Email,
expiresAt: identity.ExpiresAt,
groups: groups,
id: identity.ID,
name: preferredName,
preferredName: preferredName,
roles: roleList,
token: token,
}, nil
}
// userContext holds the information extracted the token
type userContext struct {
// the id of the user
id string
// the audience for the token
audiences []string
// whether the context is from a session cookie or authorization header
bearerToken bool
// the claims associated to the token
claims jose.Claims
// the email associated to the user
email string
// the expiration of the access token
expiresAt time.Time
// groups is a collection of groups the user in in
groups []string
// a name of the user
name string
// preferredName is the name of the user
preferredName string
// roles is a collection of roles the users holds
roles []string
// the access token itself
token jose.JWT
}
// isAudience checks the audience
func (r *userContext) isAudience(aud string) bool {
return containsString(aud, r.audiences)
}
// getRoles returns a list of roles
func (r *userContext) getRoles() string {
return strings.Join(r.roles, ",")
}
// isExpired checks if the token has expired
func (r *userContext) isExpired() bool {
return r.expiresAt.Before(time.Now())
}
// isBearer checks if the token
func (r *userContext) isBearer() bool {
return r.bearerToken
}
// isCookie checks if it's by a cookie
func (r *userContext) isCookie() bool {
return !r.isBearer()
}
// String returns a string representation of the user context
func (r *userContext) String() string {
return fmt.Sprintf("user: %s, expires: %s, roles: %s", r.preferredName, r.expiresAt.String(), strings.Join(r.roles, ","))
}