96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
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/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package union
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import (
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"strings"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/apiserver/pkg/authentication/user"
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"k8s.io/apiserver/pkg/authorization/authorizer"
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)
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// unionAuthzHandler authorizer against a chain of authorizer.Authorizer
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type unionAuthzHandler []authorizer.Authorizer
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// New returns an authorizer that authorizes against a chain of authorizer.Authorizer objects
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func New(authorizationHandlers ...authorizer.Authorizer) authorizer.Authorizer {
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return unionAuthzHandler(authorizationHandlers)
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}
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// Authorizes against a chain of authorizer.Authorizer objects and returns nil if successful and returns error if unsuccessful
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func (authzHandler unionAuthzHandler) Authorize(a authorizer.Attributes) (bool, string, error) {
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var (
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errlist []error
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reasonlist []string
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)
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for _, currAuthzHandler := range authzHandler {
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authorized, reason, err := currAuthzHandler.Authorize(a)
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if err != nil {
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errlist = append(errlist, err)
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}
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if len(reason) != 0 {
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reasonlist = append(reasonlist, reason)
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}
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if !authorized {
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continue
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}
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return true, reason, nil
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}
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return false, strings.Join(reasonlist, "\n"), utilerrors.NewAggregate(errlist)
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}
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// unionAuthzRulesHandler authorizer against a chain of authorizer.RuleResolver
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type unionAuthzRulesHandler []authorizer.RuleResolver
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// NewRuleResolvers returns an authorizer that authorizes against a chain of authorizer.Authorizer objects
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func NewRuleResolvers(authorizationHandlers ...authorizer.RuleResolver) authorizer.RuleResolver {
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return unionAuthzRulesHandler(authorizationHandlers)
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}
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// RulesFor against a chain of authorizer.RuleResolver objects and returns nil if successful and returns error if unsuccessful
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func (authzHandler unionAuthzRulesHandler) RulesFor(user user.Info, namespace string) ([]authorizer.ResourceRuleInfo, []authorizer.NonResourceRuleInfo, bool, error) {
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var (
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errList []error
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resourceRulesList []authorizer.ResourceRuleInfo
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nonResourceRulesList []authorizer.NonResourceRuleInfo
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)
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incompleteStatus := false
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for _, currAuthzHandler := range authzHandler {
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resourceRules, nonResourceRules, incomplete, err := currAuthzHandler.RulesFor(user, namespace)
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if incomplete == true {
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incompleteStatus = true
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}
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if err != nil {
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errList = append(errList, err)
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}
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if len(resourceRules) > 0 {
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resourceRulesList = append(resourceRulesList, resourceRules...)
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}
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if len(nonResourceRules) > 0 {
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nonResourceRulesList = append(nonResourceRulesList, nonResourceRules...)
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}
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}
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return resourceRulesList, nonResourceRulesList, incompleteStatus, utilerrors.NewAggregate(errList)
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}
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