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helpers.go
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helpers.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package util
import (
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/apiserver/pkg/authorization/authorizer"
authv1 "tkestack.io/tke/api/auth/v1"
)
// ResourceAttributesFrom combines the API object information and the user.Info from the context to build a full authorizer.AttributesRecord for resource access.
func ResourceAttributesFrom(user user.Info, in authv1.ResourceAttributes) authorizer.AttributesRecord {
return authorizer.AttributesRecord{
User: user,
Verb: in.Verb,
Namespace: in.Namespace,
APIGroup: in.Group,
APIVersion: in.Version,
Resource: in.Resource,
Subresource: in.Subresource,
Name: in.Name,
ResourceRequest: true,
}
}
// NonResourceAttributesFrom combines the API object information and the user.Info from the context to build a full authorizer.AttributesRecord for non resource access.
// Tke-auth considers non-resource path as the resource field.
func NonResourceAttributesFrom(user user.Info, in authv1.NonResourceAttributes) authorizer.AttributesRecord {
return authorizer.AttributesRecord{
User: user,
ResourceRequest: false,
Resource: in.Path,
Verb: in.Verb,
}
}
// AuthorizationAttributesFrom takes a spec and returns the proper authz attributes to check it.
func AuthorizationAttributesFrom(spec authv1.SubjectAccessReviewSpec) authorizer.AttributesRecord {
userToCheck := &user.DefaultInfo{
Name: spec.User,
UID: spec.UID,
Groups: spec.Groups,
Extra: convertToUserInfoExtra(spec.Extra),
}
var authorizationAttributes authorizer.AttributesRecord
if spec.ResourceAttributes != nil {
authorizationAttributes = ResourceAttributesFrom(userToCheck, *spec.ResourceAttributes)
} else {
authorizationAttributes = NonResourceAttributesFrom(userToCheck, *spec.NonResourceAttributes)
}
return authorizationAttributes
}
// AuthorizationAttributesListFrom takes a spec and returns the proper authz attribute list to check it.
func AuthorizationAttributesListFrom(spec authv1.SubjectAccessReviewSpec) []authorizer.AttributesRecord {
userToCheck := &user.DefaultInfo{
Name: spec.User,
UID: spec.UID,
Extra: convertToUserInfoExtra(spec.Extra),
}
var authorizationAttributesList []authorizer.AttributesRecord
for _, resAttr := range spec.ResourceAttributesList {
attr := ResourceAttributesFrom(userToCheck, *resAttr)
authorizationAttributesList = append(authorizationAttributesList, attr)
}
return authorizationAttributesList
}
func convertToUserInfoExtra(extra map[string]authv1.ExtraValue) map[string][]string {
if extra == nil {
return nil
}
ret := map[string][]string{}
for k, v := range extra {
ret[k] = []string(v)
}
return ret
}