/
validation.go
379 lines (323 loc) · 14.7 KB
/
validation.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
370
371
372
373
374
375
376
377
378
379
package validation
import (
"fmt"
"net/url"
"regexp"
"strings"
"k8s.io/apimachinery/pkg/api/validation/path"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/authentication/serviceaccount"
"k8s.io/kubernetes/pkg/apis/core/validation"
authorizerscopes "github.com/openshift/origin/pkg/authorization/authorizer/scope"
oauthapi "github.com/openshift/origin/pkg/oauth/apis/oauth"
uservalidation "github.com/openshift/origin/pkg/user/apis/user/validation"
)
const (
MinTokenLength = 32
// MinimumInactivityTimeoutSeconds defines the the smallest value allowed
// for AccessTokenInactivityTimeoutSeconds.
// It also defines the ticker interval for the token update routine as
// MinimumInactivityTimeoutSeconds / 3 is used there.
MinimumInactivityTimeoutSeconds = 5 * 60
)
// PKCE [RFC7636] code challenge methods supported
// https://tools.ietf.org/html/rfc7636#section-4.3
const (
codeChallengeMethodPlain = "plain"
codeChallengeMethodSHA256 = "S256"
)
var CodeChallengeMethodsSupported = []string{codeChallengeMethodPlain, codeChallengeMethodSHA256}
func ValidateTokenName(name string, prefix bool) []string {
if reasons := path.ValidatePathSegmentName(name, prefix); len(reasons) != 0 {
return reasons
}
if len(name) < MinTokenLength {
return []string{fmt.Sprintf("must be at least %d characters long", MinTokenLength)}
}
return nil
}
func ValidateRedirectURI(redirect string) (bool, string) {
if len(redirect) == 0 {
return true, ""
}
u, err := url.Parse(redirect)
if err != nil {
return false, err.Error()
}
if len(u.Fragment) != 0 {
return false, "may not contain a fragment"
}
for _, s := range strings.Split(u.Path, "/") {
if s == "." {
return false, "may not contain a path segment of ."
}
if s == ".." {
return false, "may not contain a path segment of .."
}
}
return true, ""
}
func ValidateAccessToken(accessToken *oauthapi.OAuthAccessToken) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&accessToken.ObjectMeta, false, ValidateTokenName, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateClientNameField(accessToken.ClientName, field.NewPath("clientName"))...)
allErrs = append(allErrs, ValidateUserNameField(accessToken.UserName, field.NewPath("userName"))...)
allErrs = append(allErrs, ValidateScopes(accessToken.Scopes, field.NewPath("scopes"))...)
if len(accessToken.UserUID) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("userUID"), ""))
}
// negative values are not allowed
if accessToken.InactivityTimeoutSeconds < 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("inactivityTimeoutSeconds"),
accessToken.InactivityTimeoutSeconds, "cannot be a negative value"))
}
if ok, msg := ValidateRedirectURI(accessToken.RedirectURI); !ok {
allErrs = append(allErrs, field.Invalid(field.NewPath("redirectURI"), accessToken.RedirectURI, msg))
}
return allErrs
}
func ValidateAccessTokenUpdate(newToken, oldToken *oauthapi.OAuthAccessToken) field.ErrorList {
allErrs := validation.ValidateObjectMetaUpdate(&newToken.ObjectMeta, &oldToken.ObjectMeta, field.NewPath("metadata"))
// since InactivityTimeoutSeconds can be concurrently updated by multipe masters we do
// not allow it to decrease in value, as that would cause "updated" tokens
// to timeout earlier than they should. 0 is the exception, as this value
// indicates that the token does not expire, and it is an allowed new
// value.
if newToken.InactivityTimeoutSeconds > 0 && newToken.InactivityTimeoutSeconds < oldToken.InactivityTimeoutSeconds {
allErrs = append(allErrs, field.Invalid(field.NewPath("inactivityTimeoutSeconds"), newToken.InactivityTimeoutSeconds,
fmt.Sprintf("cannot be less than the current value=%d", oldToken.InactivityTimeoutSeconds)))
}
// negative values are not allowed either
if newToken.InactivityTimeoutSeconds < 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("inactivityTimeoutSeconds"), newToken.InactivityTimeoutSeconds,
"cannot be a negative value"))
}
// we do not allow tokens to turn into timing out tokens after issuance
if oldToken.InactivityTimeoutSeconds == 0 && newToken.InactivityTimeoutSeconds != 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("inactivityTimeoutSeconds"), newToken.InactivityTimeoutSeconds,
"cannot update non-timing-out token"))
}
copied := *oldToken
copied.ObjectMeta = newToken.ObjectMeta
// allow only InactivityTimeoutSeconds to be changed
copied.InactivityTimeoutSeconds = newToken.InactivityTimeoutSeconds
return append(allErrs, validation.ValidateImmutableField(newToken, &copied, field.NewPath(""))...)
}
var codeChallengeRegex = regexp.MustCompile("^[a-zA-Z0-9._~-]{43,128}$")
func ValidateAuthorizeToken(authorizeToken *oauthapi.OAuthAuthorizeToken) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&authorizeToken.ObjectMeta, false, ValidateTokenName, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateClientNameField(authorizeToken.ClientName, field.NewPath("clientName"))...)
allErrs = append(allErrs, ValidateUserNameField(authorizeToken.UserName, field.NewPath("userName"))...)
allErrs = append(allErrs, ValidateScopes(authorizeToken.Scopes, field.NewPath("scopes"))...)
if len(authorizeToken.UserUID) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("userUID"), ""))
}
if ok, msg := ValidateRedirectURI(authorizeToken.RedirectURI); !ok {
allErrs = append(allErrs, field.Invalid(field.NewPath("redirectURI"), authorizeToken.RedirectURI, msg))
}
if len(authorizeToken.CodeChallenge) > 0 || len(authorizeToken.CodeChallengeMethod) > 0 {
switch {
case len(authorizeToken.CodeChallenge) == 0:
allErrs = append(allErrs, field.Required(field.NewPath("codeChallenge"), "required if codeChallengeMethod is specified"))
case !codeChallengeRegex.MatchString(authorizeToken.CodeChallenge):
allErrs = append(allErrs, field.Invalid(field.NewPath("codeChallenge"), authorizeToken.CodeChallenge, "must be 43-128 characters [a-zA-Z0-9.~_-]"))
}
switch authorizeToken.CodeChallengeMethod {
case "":
allErrs = append(allErrs, field.Required(field.NewPath("codeChallengeMethod"), "required if codeChallenge is specified"))
case codeChallengeMethodPlain, codeChallengeMethodSHA256:
// no-op, good
default:
allErrs = append(allErrs, field.NotSupported(field.NewPath("codeChallengeMethod"), authorizeToken.CodeChallengeMethod, CodeChallengeMethodsSupported))
}
}
return allErrs
}
func ValidateAuthorizeTokenUpdate(newToken, oldToken *oauthapi.OAuthAuthorizeToken) field.ErrorList {
allErrs := validation.ValidateObjectMetaUpdate(&newToken.ObjectMeta, &oldToken.ObjectMeta, field.NewPath("metadata"))
copied := *oldToken
copied.ObjectMeta = newToken.ObjectMeta
return append(allErrs, validation.ValidateImmutableField(newToken, &copied, field.NewPath(""))...)
}
func ValidateClient(client *oauthapi.OAuthClient) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&client.ObjectMeta, false, validation.NameIsDNSSubdomain, field.NewPath("metadata"))
for i, redirect := range client.RedirectURIs {
if ok, msg := ValidateRedirectURI(redirect); !ok {
allErrs = append(allErrs, field.Invalid(field.NewPath("redirectURIs").Index(i), redirect, msg))
}
}
for i, restriction := range client.ScopeRestrictions {
allErrs = append(allErrs, ValidateScopeRestriction(restriction, field.NewPath("scopeRestrictions").Index(i))...)
}
if client.AccessTokenInactivityTimeoutSeconds != nil {
timeout := *client.AccessTokenInactivityTimeoutSeconds
if timeout > 0 && timeout < MinimumInactivityTimeoutSeconds {
allErrs = append(allErrs, field.Invalid(
field.NewPath("accessTokenInactivityTimeoutSeconds"),
client.AccessTokenInactivityTimeoutSeconds,
fmt.Sprintf("The minimum valid timeout value is %d seconds", MinimumInactivityTimeoutSeconds)))
}
if timeout < 0 {
allErrs = append(allErrs, field.Invalid(
field.NewPath("accessTokenInactivityTimeoutSeconds"),
client.AccessTokenInactivityTimeoutSeconds, "value cannot be negative"))
}
}
return allErrs
}
func ValidateScopeRestriction(restriction oauthapi.ScopeRestriction, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
specifiers := 0
if len(restriction.ExactValues) > 0 {
specifiers = specifiers + 1
}
if restriction.ClusterRole != nil {
specifiers = specifiers + 1
}
if specifiers != 1 {
allErrs = append(allErrs, field.Invalid(fldPath, restriction, "exactly one of literals, clusterRole is required"))
return allErrs
}
switch {
case len(restriction.ExactValues) > 0:
for i, literal := range restriction.ExactValues {
if len(literal) == 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("literals").Index(i), literal, "may not be empty"))
}
}
case restriction.ClusterRole != nil:
if len(restriction.ClusterRole.RoleNames) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("clusterRole", "roleNames"), "won't match anything"))
}
if len(restriction.ClusterRole.Namespaces) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("clusterRole", "namespaces"), "won't match anything"))
}
}
return allErrs
}
func ValidateClientUpdate(client *oauthapi.OAuthClient, oldClient *oauthapi.OAuthClient) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateClient(client)...)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&client.ObjectMeta, &oldClient.ObjectMeta, field.NewPath("metadata"))...)
return allErrs
}
func ValidateClientAuthorizationName(name string, prefix bool) []string {
if reasons := path.ValidatePathSegmentName(name, prefix); len(reasons) != 0 {
return reasons
}
lastColon := strings.Index(name, ":")
if lastColon <= 0 || lastColon >= len(name)-1 {
return []string{"must be in the format <userName>:<clientName>"}
}
return nil
}
func ValidateClientAuthorization(clientAuthorization *oauthapi.OAuthClientAuthorization) field.ErrorList {
allErrs := field.ErrorList{}
expectedName := fmt.Sprintf("%s:%s", clientAuthorization.UserName, clientAuthorization.ClientName)
metadataErrs := validation.ValidateObjectMeta(&clientAuthorization.ObjectMeta, false, ValidateClientAuthorizationName, field.NewPath("metadata"))
if len(metadataErrs) > 0 {
allErrs = append(allErrs, metadataErrs...)
} else if clientAuthorization.Name != expectedName {
allErrs = append(allErrs, field.Invalid(field.NewPath("metadata", "name"), clientAuthorization.Name, "must be in the format <userName>:<clientName>"))
}
allErrs = append(allErrs, ValidateClientNameField(clientAuthorization.ClientName, field.NewPath("clientName"))...)
allErrs = append(allErrs, ValidateUserNameField(clientAuthorization.UserName, field.NewPath("userName"))...)
allErrs = append(allErrs, ValidateScopes(clientAuthorization.Scopes, field.NewPath("scopes"))...)
if len(clientAuthorization.UserUID) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("useruid"), ""))
}
return allErrs
}
func ValidateClientAuthorizationUpdate(newAuth *oauthapi.OAuthClientAuthorization, oldAuth *oauthapi.OAuthClientAuthorization) field.ErrorList {
allErrs := ValidateClientAuthorization(newAuth)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&newAuth.ObjectMeta, &oldAuth.ObjectMeta, field.NewPath("metadata"))...)
if oldAuth.ClientName != newAuth.ClientName {
allErrs = append(allErrs, field.Invalid(field.NewPath("clientName"), newAuth.ClientName, "clientName is not a mutable field"))
}
if oldAuth.UserName != newAuth.UserName {
allErrs = append(allErrs, field.Invalid(field.NewPath("userName"), newAuth.UserName, "userName is not a mutable field"))
}
if oldAuth.UserUID != newAuth.UserUID {
allErrs = append(allErrs, field.Invalid(field.NewPath("userUID"), newAuth.UserUID, "userUID is not a mutable field"))
}
return allErrs
}
func ValidateClientNameField(value string, fldPath *field.Path) field.ErrorList {
if len(value) == 0 {
return field.ErrorList{field.Required(fldPath, "")}
} else if _, saName, err := serviceaccount.SplitUsername(value); err == nil {
if reasons := validation.ValidateServiceAccountName(saName, false); len(reasons) != 0 {
return field.ErrorList{field.Invalid(fldPath, value, strings.Join(reasons, ", "))}
}
} else if reasons := validation.NameIsDNSSubdomain(value, false); len(reasons) != 0 {
return field.ErrorList{field.Invalid(fldPath, value, strings.Join(reasons, ", "))}
}
return field.ErrorList{}
}
func ValidateUserNameField(value string, fldPath *field.Path) field.ErrorList {
if len(value) == 0 {
return field.ErrorList{field.Required(fldPath, "")}
} else if reasons := uservalidation.ValidateUserName(value, false); len(reasons) != 0 {
return field.ErrorList{field.Invalid(fldPath, value, strings.Join(reasons, ", "))}
}
return field.ErrorList{}
}
func ValidateScopes(scopes []string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
for i, scope := range scopes {
illegalCharacter := false
// https://tools.ietf.org/html/rfc6749#section-3.3 (full list of allowed chars is %x21 / %x23-5B / %x5D-7E)
// for those without an ascii table, that's `!`, `#-[`, `]-~` inclusive.
for _, ch := range scope {
switch {
case ch == '!':
case ch >= '#' && ch <= '[':
case ch >= ']' && ch <= '~':
default:
allErrs = append(allErrs, field.Invalid(fldPath.Index(i), scope, fmt.Sprintf("%v not allowed", ch)))
illegalCharacter = true
}
}
if illegalCharacter {
continue
}
found := false
for _, evaluator := range authorizerscopes.ScopeEvaluators {
if !evaluator.Handles(scope) {
continue
}
found = true
if err := evaluator.Validate(scope); err != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Index(i), scope, err.Error()))
break
}
}
if !found {
allErrs = append(allErrs, field.Invalid(fldPath.Index(i), scope, "no scope handler found"))
}
}
return allErrs
}
func ValidateOAuthRedirectReference(sref *oauthapi.OAuthRedirectReference) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&sref.ObjectMeta, true, path.ValidatePathSegmentName, field.NewPath("metadata"))
return append(allErrs, validateRedirectReference(&sref.Reference)...)
}
func validateRedirectReference(ref *oauthapi.RedirectReference) field.ErrorList {
allErrs := field.ErrorList{}
if len(ref.Name) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("name"), "may not be empty"))
} else {
for _, msg := range path.ValidatePathSegmentName(ref.Name, false) {
allErrs = append(allErrs, field.Invalid(field.NewPath("name"), ref.Name, msg))
}
}
switch ref.Kind {
case "":
allErrs = append(allErrs, field.Required(field.NewPath("kind"), "may not be empty"))
case "Route":
// Valid, TODO add ingress once we support it and update error message
default:
allErrs = append(allErrs, field.Invalid(field.NewPath("kind"), ref.Kind, "must be Route"))
}
// TODO validate group once we start using it
return allErrs
}