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89 lines
2.9 KiB
Go
89 lines
2.9 KiB
Go
/*
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Copyright 2016 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 selfsubjectaccessreview
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import (
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"context"
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"fmt"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apiserver/pkg/authorization/authorizer"
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genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
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"k8s.io/apiserver/pkg/registry/rest"
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authorizationapi "k8s.io/kubernetes/pkg/apis/authorization"
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authorizationvalidation "k8s.io/kubernetes/pkg/apis/authorization/validation"
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authorizationutil "k8s.io/kubernetes/pkg/registry/authorization/util"
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)
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type REST struct {
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authorizer authorizer.Authorizer
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}
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func NewREST(authorizer authorizer.Authorizer) *REST {
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return &REST{authorizer}
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}
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func (r *REST) NamespaceScoped() bool {
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return false
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}
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func (r *REST) New() runtime.Object {
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return &authorizationapi.SelfSubjectAccessReview{}
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}
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func (r *REST) Create(ctx context.Context, obj runtime.Object, createValidation rest.ValidateObjectFunc, options *metav1.CreateOptions) (runtime.Object, error) {
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selfSAR, ok := obj.(*authorizationapi.SelfSubjectAccessReview)
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if !ok {
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return nil, apierrors.NewBadRequest(fmt.Sprintf("not a SelfSubjectAccessReview: %#v", obj))
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}
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if errs := authorizationvalidation.ValidateSelfSubjectAccessReview(selfSAR); len(errs) > 0 {
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return nil, apierrors.NewInvalid(authorizationapi.Kind(selfSAR.Kind), "", errs)
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}
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userToCheck, exists := genericapirequest.UserFrom(ctx)
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if !exists {
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return nil, apierrors.NewBadRequest("no user present on request")
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}
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if createValidation != nil {
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if err := createValidation(ctx, obj.DeepCopyObject()); err != nil {
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return nil, err
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}
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}
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var authorizationAttributes authorizer.AttributesRecord
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if selfSAR.Spec.ResourceAttributes != nil {
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authorizationAttributes = authorizationutil.ResourceAttributesFrom(userToCheck, *selfSAR.Spec.ResourceAttributes)
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} else {
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authorizationAttributes = authorizationutil.NonResourceAttributesFrom(userToCheck, *selfSAR.Spec.NonResourceAttributes)
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}
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decision, reason, evaluationErr := r.authorizer.Authorize(ctx, authorizationAttributes)
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selfSAR.Status = authorizationapi.SubjectAccessReviewStatus{
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Allowed: (decision == authorizer.DecisionAllow),
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Denied: (decision == authorizer.DecisionDeny),
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Reason: reason,
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}
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if evaluationErr != nil {
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selfSAR.Status.EvaluationError = evaluationErr.Error()
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}
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return selfSAR, nil
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}
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