/
storage.go
127 lines (105 loc) · 4.33 KB
/
storage.go
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package subjectrulesreview
import (
"context"
"fmt"
"sort"
rbacv1 "k8s.io/api/rbac/v1"
kapierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
kutilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/apiserver/pkg/authentication/user"
apirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/registry/rest"
rbaclisters "k8s.io/client-go/listers/rbac/v1"
rbacv1helpers "k8s.io/kubernetes/pkg/apis/rbac/v1"
rbacregistryvalidation "k8s.io/kubernetes/pkg/registry/rbac/validation"
authorizationapi "github.com/openshift/origin/pkg/authorization/apis/authorization"
"github.com/openshift/origin/pkg/authorization/apis/authorization/rbacconversion"
"github.com/openshift/origin/pkg/authorization/authorizer/scope"
)
type REST struct {
ruleResolver rbacregistryvalidation.AuthorizationRuleResolver
clusterRoleGetter rbaclisters.ClusterRoleLister
}
var _ rest.Creater = &REST{}
var _ rest.Scoper = &REST{}
func NewREST(ruleResolver rbacregistryvalidation.AuthorizationRuleResolver, clusterRoleGetter rbaclisters.ClusterRoleLister) *REST {
return &REST{ruleResolver: ruleResolver, clusterRoleGetter: clusterRoleGetter}
}
func (r *REST) New() runtime.Object {
return &authorizationapi.SubjectRulesReview{}
}
func (s *REST) NamespaceScoped() bool {
return true
}
// Create registers a given new ResourceAccessReview instance to r.registry.
func (r *REST) Create(ctx context.Context, obj runtime.Object, _ rest.ValidateObjectFunc, options *metav1.CreateOptions) (runtime.Object, error) {
rulesReview, ok := obj.(*authorizationapi.SubjectRulesReview)
if !ok {
return nil, kapierrors.NewBadRequest(fmt.Sprintf("not a SubjectRulesReview: %#v", obj))
}
namespace := apirequest.NamespaceValue(ctx)
if len(namespace) == 0 {
return nil, kapierrors.NewBadRequest(fmt.Sprintf("namespace is required on this type: %v", namespace))
}
userToCheck := &user.DefaultInfo{
Name: rulesReview.Spec.User,
Groups: rulesReview.Spec.Groups,
Extra: map[string][]string{},
}
if len(rulesReview.Spec.Scopes) > 0 {
userToCheck.Extra[authorizationapi.ScopesKey] = rulesReview.Spec.Scopes
}
rules, errors := GetEffectivePolicyRules(apirequest.WithUser(ctx, userToCheck), r.ruleResolver, r.clusterRoleGetter)
ret := &authorizationapi.SubjectRulesReview{
Status: authorizationapi.SubjectRulesReviewStatus{
Rules: rbacconversion.Convert_rbacv1_PolicyRules_To_authorization_PolicyRules(rules), //TODO can we fix this ?
},
}
if len(errors) != 0 {
ret.Status.EvaluationError = kutilerrors.NewAggregate(errors).Error()
}
return ret, nil
}
func GetEffectivePolicyRules(ctx context.Context, ruleResolver rbacregistryvalidation.AuthorizationRuleResolver, clusterRoleGetter rbaclisters.ClusterRoleLister) ([]rbacv1.PolicyRule, []error) {
namespace := apirequest.NamespaceValue(ctx)
if len(namespace) == 0 {
return nil, []error{kapierrors.NewBadRequest(fmt.Sprintf("namespace is required on this type: %v", namespace))}
}
user, exists := apirequest.UserFrom(ctx)
if !exists {
return nil, []error{kapierrors.NewBadRequest(fmt.Sprintf("user missing from context"))}
}
var errors []error
var rules []rbacv1.PolicyRule
namespaceRules, err := ruleResolver.RulesFor(user, namespace)
if err != nil {
errors = append(errors, err)
}
for _, rule := range namespaceRules {
rules = append(rules, rbacregistryvalidation.BreakdownRule(rule)...)
}
if scopes := user.GetExtra()[authorizationapi.ScopesKey]; len(scopes) > 0 {
rules, err = filterRulesByScopes(rules, scopes, namespace, clusterRoleGetter)
if err != nil {
errors = append(errors, err)
}
}
if compactedRules, err := rbacregistryvalidation.CompactRules(rules); err == nil {
rules = compactedRules
}
sort.Sort(rbacv1helpers.SortableRuleSlice(rules))
return rules, errors
}
func filterRulesByScopes(rules []rbacv1.PolicyRule, scopes []string, namespace string, clusterRoleGetter rbaclisters.ClusterRoleLister) ([]rbacv1.PolicyRule, error) {
scopeRules, err := scope.ScopesToRules(scopes, namespace, clusterRoleGetter)
// it's ok if there are errors, we'll just bubble them up
filteredRules := []rbacv1.PolicyRule{}
for _, rule := range rules {
if allowed, _ := rbacregistryvalidation.Covers(scopeRules, []rbacv1.PolicyRule{rule}); allowed {
filteredRules = append(filteredRules, rule)
}
}
return filteredRules, err
}