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pkg/master: enable certificates API and add rbac authorizer
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Eric Chiang
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May 25, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* | ||
| Copyright 2016 The Kubernetes Authors 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 rbac implements the authorizer.Authorizer interface using roles base access control. | ||
| package rbac | ||
|
|
||
| import ( | ||
| "k8s.io/kubernetes/pkg/api" | ||
| "k8s.io/kubernetes/pkg/apis/rbac" | ||
| "k8s.io/kubernetes/pkg/apis/rbac/validation" | ||
| "k8s.io/kubernetes/pkg/auth/authorizer" | ||
| "k8s.io/kubernetes/pkg/auth/user" | ||
| "k8s.io/kubernetes/pkg/registry/clusterrole" | ||
| "k8s.io/kubernetes/pkg/registry/clusterrolebinding" | ||
| "k8s.io/kubernetes/pkg/registry/role" | ||
| "k8s.io/kubernetes/pkg/registry/rolebinding" | ||
| ) | ||
|
|
||
| type RBACAuthorizer struct { | ||
| superUser string | ||
|
|
||
| authorizationRuleResolver validation.AuthorizationRuleResolver | ||
| } | ||
|
|
||
| func (r *RBACAuthorizer) Authorize(attr authorizer.Attributes) error { | ||
| if r.superUser != "" && attr.GetUserName() == r.superUser { | ||
| return nil | ||
| } | ||
|
|
||
| userInfo := &user.DefaultInfo{ | ||
| Name: attr.GetUserName(), | ||
| Groups: attr.GetGroups(), | ||
| } | ||
|
|
||
| ctx := api.WithNamespace(api.WithUser(api.NewContext(), userInfo), attr.GetNamespace()) | ||
|
|
||
| // Frame the authorization request as a privilege escalation check. | ||
| var requestedRule rbac.PolicyRule | ||
| if attr.IsResourceRequest() { | ||
| requestedRule = rbac.PolicyRule{ | ||
| Verbs: []string{attr.GetVerb()}, | ||
| APIGroups: []string{attr.GetAPIGroup()}, // TODO(ericchiang): add api version here too? | ||
| Resources: []string{attr.GetResource()}, | ||
| ResourceNames: []string{attr.GetName()}, | ||
| } | ||
| } else { | ||
| requestedRule = rbac.PolicyRule{ | ||
| NonResourceURLs: []string{attr.GetPath()}, | ||
| } | ||
| } | ||
|
|
||
| return validation.ConfirmNoEscalation(ctx, r.authorizationRuleResolver, []rbac.PolicyRule{requestedRule}) | ||
| } | ||
|
|
||
| func New(roleRegistry role.Registry, roleBindingRegistry rolebinding.Registry, clusterRoleRegistry clusterrole.Registry, clusterRoleBindingRegistry clusterrolebinding.Registry, superUser string) (*RBACAuthorizer, error) { | ||
| authorizer := &RBACAuthorizer{ | ||
| superUser: superUser, | ||
| authorizationRuleResolver: validation.NewDefaultRuleResolver( | ||
| roleRegistry, | ||
| roleBindingRegistry, | ||
| clusterRoleRegistry, | ||
| clusterRoleBindingRegistry, | ||
| ), | ||
| } | ||
| return authorizer, nil | ||
| } |
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