helpers.go

Documentation: k8s.io/kubernetes/pkg/registry/authorization/util

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package util
    18  
    19  import (
    20  	"k8s.io/apiserver/pkg/authentication/user"
    21  	"k8s.io/apiserver/pkg/authorization/authorizer"
    22  	authorizationapi "k8s.io/kubernetes/pkg/apis/authorization"
    23  )
    24  
    25  // ResourceAttributesFrom combines the API object information and the user.Info from the context to build a full authorizer.AttributesRecord for resource access
    26  func ResourceAttributesFrom(user user.Info, in authorizationapi.ResourceAttributes) authorizer.AttributesRecord {
    27  	return authorizer.AttributesRecord{
    28  		User:            user,
    29  		Verb:            in.Verb,
    30  		Namespace:       in.Namespace,
    31  		APIGroup:        in.Group,
    32  		APIVersion:      matchAllVersionIfEmpty(in.Version),
    33  		Resource:        in.Resource,
    34  		Subresource:     in.Subresource,
    35  		Name:            in.Name,
    36  		ResourceRequest: true,
    37  	}
    38  }
    39  
    40  // NonResourceAttributesFrom combines the API object information and the user.Info from the context to build a full authorizer.AttributesRecord for non resource access
    41  func NonResourceAttributesFrom(user user.Info, in authorizationapi.NonResourceAttributes) authorizer.AttributesRecord {
    42  	return authorizer.AttributesRecord{
    43  		User:            user,
    44  		ResourceRequest: false,
    45  		Path:            in.Path,
    46  		Verb:            in.Verb,
    47  	}
    48  }
    49  
    50  func convertToUserInfoExtra(extra map[string]authorizationapi.ExtraValue) map[string][]string {
    51  	if extra == nil {
    52  		return nil
    53  	}
    54  	ret := map[string][]string{}
    55  	for k, v := range extra {
    56  		ret[k] = []string(v)
    57  	}
    58  
    59  	return ret
    60  }
    61  
    62  // AuthorizationAttributesFrom takes a spec and returns the proper authz attributes to check it.
    63  func AuthorizationAttributesFrom(spec authorizationapi.SubjectAccessReviewSpec) authorizer.AttributesRecord {
    64  	userToCheck := &user.DefaultInfo{
    65  		Name:   spec.User,
    66  		Groups: spec.Groups,
    67  		UID:    spec.UID,
    68  		Extra:  convertToUserInfoExtra(spec.Extra),
    69  	}
    70  
    71  	var authorizationAttributes authorizer.AttributesRecord
    72  	if spec.ResourceAttributes != nil {
    73  		authorizationAttributes = ResourceAttributesFrom(userToCheck, *spec.ResourceAttributes)
    74  	} else {
    75  		authorizationAttributes = NonResourceAttributesFrom(userToCheck, *spec.NonResourceAttributes)
    76  	}
    77  
    78  	return authorizationAttributes
    79  }
    80  
    81  // matchAllVersionIfEmpty returns a "*" if the version is unspecified
    82  func matchAllVersionIfEmpty(version string) string {
    83  	if len(version) == 0 {
    84  		return "*"
    85  	}
    86  	return version
    87  }
    88
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