-
Notifications
You must be signed in to change notification settings - Fork 48
/
jose.go
369 lines (312 loc) · 7.79 KB
/
jose.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
package jose
import (
"encoding/json"
"fmt"
"math"
"net/http"
"strings"
"time"
"github.com/krakend/go-auth0"
"github.com/luraproject/lura/v2/proxy"
jose "gopkg.in/square/go-jose.v2"
"gopkg.in/square/go-jose.v2/jwt"
)
var ErrNoHeadersToPropagate = fmt.Errorf("header propagation is disabled because there is no propagate_claims attribute")
type ExtractorFactory func(string) func(r *http.Request) (*jwt.JSONWebToken, error)
func NewValidator(signatureConfig *SignatureConfig, cookieEf, headerEf ExtractorFactory) (*auth0.JWTValidator, error) {
sa, ok := supportedAlgorithms[signatureConfig.Alg]
if !ok {
return nil, fmt.Errorf("JOSE: unknown algorithm %s", signatureConfig.Alg)
}
te := auth0.FromMultiple(
auth0.RequestTokenExtractorFunc(headerEf(signatureConfig.AuthHeaderName)),
auth0.RequestTokenExtractorFunc(cookieEf(signatureConfig.CookieKey)),
)
decodedFs, err := DecodeFingerprints(signatureConfig.Fingerprints)
if err != nil {
return nil, err
}
cfg := SecretProviderConfig{
URI: signatureConfig.URI,
CacheEnabled: signatureConfig.CacheEnabled,
CacheDuration: signatureConfig.CacheDuration,
Fingerprints: decodedFs,
Cs: signatureConfig.CipherSuites,
LocalCA: signatureConfig.LocalCA,
AllowInsecure: signatureConfig.DisableJWKSecurity,
LocalPath: signatureConfig.LocalPath,
SecretURL: signatureConfig.SecretURL,
CipherKey: signatureConfig.CipherKey,
KeyIdentifyStrategy: signatureConfig.KeyIdentifyStrategy,
}
sp, err := SecretProvider(cfg, te)
if err != nil {
return nil, err
}
leeway, err := time.ParseDuration(signatureConfig.Leeway)
if err != nil {
leeway = time.Second
}
return auth0.NewValidatorWithLeeway(
auth0.NewConfiguration(
sp,
signatureConfig.Audience,
signatureConfig.Issuer,
sa,
),
te,
leeway,
), nil
}
func CanAccessNested(roleKey string, claims map[string]interface{}, required []string) bool {
if len(required) == 0 {
return true
}
tmp := claims
keys := strings.Split(roleKey, ".")
for _, key := range keys[:len(keys)-1] {
v, ok := tmp[key]
if !ok {
return false
}
tmp, ok = v.(map[string]interface{})
if !ok {
return false
}
}
return CanAccess(keys[len(keys)-1], tmp, required)
}
func CanAccess(roleKey string, claims map[string]interface{}, required []string) bool {
if len(required) == 0 {
return true
}
tmp, ok := claims[roleKey]
if !ok {
return false
}
roles, ok := tmp.([]interface{})
if ok {
for _, role := range required {
for _, r := range roles {
if r.(string) == role {
return true
}
}
}
return false
}
roleString, ok := tmp.(string)
if !ok {
return false
}
roless := strings.Split(roleString, " ")
for _, role := range required {
for _, r := range roless {
if r == role {
return true
}
}
}
return false
}
func getNestedClaim(nestedKey string, claims map[string]interface{}) (string, map[string]interface{}) {
tmp := claims
keys := strings.Split(nestedKey, ".")
for _, key := range keys[:len(keys)-1] {
v, ok := tmp[key]
if !ok {
return nestedKey, nil
}
tmp, ok = v.(map[string]interface{})
if !ok {
return nestedKey, nil
}
}
return keys[len(keys)-1], tmp
}
func ScopesAllMatcher(scopesKey string, claims map[string]interface{}, requiredScopes []string) bool {
if len(requiredScopes) == 0 {
return true
}
tmpClaims := claims
tmpKey := scopesKey
if strings.Contains(scopesKey, ".") {
tmpKey, tmpClaims = getNestedClaim(scopesKey, claims)
}
tmp, ok := tmpClaims[tmpKey]
if !ok {
return false
}
matchAll := func(required []string, given []string) bool {
for _, rScope := range required {
matched := false
for _, pScope := range given {
if rScope == pScope {
matched = true
}
}
if !matched { // required scope was not found --> immediately return
return false
}
}
// all required scopes have been found in provided (claims) scopes
return true
}
scopes, ok := tmp.([]interface{})
if ok {
if len(scopes) > 0 {
return matchAll(requiredScopes, convertToStringSlice(scopes))
}
}
scopeString, ok := tmp.(string)
if !ok {
return false
}
presentScopes := strings.Split(scopeString, " ")
if len(presentScopes) > 0 {
return matchAll(requiredScopes, presentScopes)
}
return false
}
func ScopesDefaultMatcher(_ string, _ map[string]interface{}, _ []string) bool {
return true
}
func ScopesAnyMatcher(scopesKey string, claims map[string]interface{}, requiredScopes []string) bool {
if len(requiredScopes) == 0 {
return true
}
tmpClaims := claims
tmpKey := scopesKey
if strings.Contains(scopesKey, ".") {
tmpKey, tmpClaims = getNestedClaim(scopesKey, claims)
}
tmp, ok := tmpClaims[tmpKey]
if !ok {
return false
}
matchAny := func(required []string, given []string) bool {
for _, rScope := range required {
for _, pScope := range given {
if rScope == pScope {
return true // found any of the required scopes --> return
}
}
}
// none of the scopes have been found in provided (claims) scopes
return false
}
scopes, ok := tmp.([]interface{})
if ok {
if len(scopes) > 0 {
return matchAny(requiredScopes, convertToStringSlice(scopes))
}
}
scopeClaim, ok := tmp.(string)
if !ok {
return false
}
presentScopes := strings.Split(scopeClaim, " ")
if len(presentScopes) > 0 {
return matchAny(requiredScopes, presentScopes)
}
return false
}
func SignFields(keys []string, signer Signer, response *proxy.Response) error {
for _, key := range keys {
tmp, ok := response.Data[key]
if !ok {
continue
}
data, ok := tmp.(map[string]interface{})
if !ok {
continue
}
token, err := signer(data)
if err != nil {
return err
}
response.Data[key] = token
}
return nil
}
type Claims map[string]interface{}
const epsilon = 1e-6
func (c Claims) Get(name string) (string, bool) {
tmp, ok := c[name]
if !ok {
return "", ok
}
var normalized string
switch v := tmp.(type) {
case string:
normalized = v
case int:
normalized = fmt.Sprintf("%d", v)
case float64:
if r := math.Round(v); math.Abs(v-r) <= epsilon {
return fmt.Sprintf("%d", int(r)), ok
}
normalized = fmt.Sprintf("%f", v)
case []interface{}:
if len(v) > 0 {
normalized = fmt.Sprintf("%v", v[0])
for _, elem := range v[1:] {
normalized += fmt.Sprintf(",%v", elem)
}
}
default:
b, _ := json.Marshal(v)
normalized = string(b)
}
return normalized, ok
}
func CalculateHeadersToPropagate(propagationCfg [][]string, claims map[string]interface{}) (map[string]string, error) {
if len(propagationCfg) == 0 {
return nil, ErrNoHeadersToPropagate
}
propagated := make(map[string]string)
var err error
for _, tuple := range propagationCfg {
if len(tuple) != 2 {
err = fmt.Errorf("invalid number of claims to propagate: %+v", tuple)
continue
}
fromClaim := tuple[0]
toHeader := tuple[1]
c := Claims(claims)
if strings.Contains(fromClaim, ".") && (len(fromClaim) < 4 || fromClaim[:4] != "http") {
var claimsMap map[string]interface{}
fromClaim, claimsMap = getNestedClaim(fromClaim, claims)
c = Claims(claimsMap)
}
v, _ := c.Get(fromClaim)
propagated[toHeader] = v
}
return propagated, err
}
var supportedAlgorithms = map[string]jose.SignatureAlgorithm{
"EdDSA": jose.EdDSA,
"HS256": jose.HS256,
"HS384": jose.HS384,
"HS512": jose.HS512,
"RS256": jose.RS256,
"RS384": jose.RS384,
"RS512": jose.RS512,
"ES256": jose.ES256,
"ES384": jose.ES384,
"ES512": jose.ES512,
"PS256": jose.PS256,
"PS384": jose.PS384,
"PS512": jose.PS512,
}
func SupportedAlgorithm(s string) (jose.SignatureAlgorithm, bool) {
a, ok := supportedAlgorithms[s]
return a, ok
}
func convertToStringSlice(input []interface{}) []string {
result := make([]string, len(input))
for i, v := range input {
result[i] = v.(string)
}
return result
}