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conversion.go
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conversion.go
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package api
import (
"fmt"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/apis/rbac"
"k8s.io/kubernetes/pkg/conversion"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/sets"
"github.com/openshift/origin/pkg/user/api/validation"
)
func addConversionFuncs(scheme *runtime.Scheme) error {
if err := scheme.AddConversionFuncs(
Convert_api_ClusterRole_To_rbac_ClusterRole,
Convert_api_Role_To_rbac_Role,
Convert_api_ClusterRoleBinding_To_rbac_ClusterRoleBinding,
Convert_api_RoleBinding_To_rbac_RoleBinding,
Convert_rbac_ClusterRole_To_api_ClusterRole,
Convert_rbac_Role_To_api_Role,
Convert_rbac_ClusterRoleBinding_To_api_ClusterRoleBinding,
Convert_rbac_RoleBinding_To_api_RoleBinding,
); err != nil { // If one of the conversion functions is malformed, detect it immediately.
return err
}
return nil
}
func Convert_api_ClusterRole_To_rbac_ClusterRole(in *ClusterRole, out *rbac.ClusterRole, _ conversion.Scope) error {
out.ObjectMeta = in.ObjectMeta
out.Rules = convert_api_PolicyRules_To_rbac_PolicyRules(in.Rules)
return nil
}
func Convert_api_Role_To_rbac_Role(in *Role, out *rbac.Role, _ conversion.Scope) error {
out.ObjectMeta = in.ObjectMeta
out.Rules = convert_api_PolicyRules_To_rbac_PolicyRules(in.Rules)
return nil
}
func Convert_api_ClusterRoleBinding_To_rbac_ClusterRoleBinding(in *ClusterRoleBinding, out *rbac.ClusterRoleBinding, _ conversion.Scope) error {
var err error
if out.Subjects, err = convert_api_Subjects_To_rbac_Subjects(in.Subjects); err != nil {
return err
}
out.RoleRef = convert_api_RoleRef_To_rbac_RoleRef(&in.RoleRef)
out.ObjectMeta = in.ObjectMeta
return nil
}
func Convert_api_RoleBinding_To_rbac_RoleBinding(in *RoleBinding, out *rbac.RoleBinding, _ conversion.Scope) error {
if len(in.RoleRef.Namespace) != 0 && in.RoleRef.Namespace != in.Namespace {
return fmt.Errorf("invalid origin role binding %s: attempts to reference role in namespace %q instead of current namespace %q", in.Name, in.RoleRef.Namespace, in.Namespace)
}
var err error
if out.Subjects, err = convert_api_Subjects_To_rbac_Subjects(in.Subjects); err != nil {
return err
}
out.RoleRef = convert_api_RoleRef_To_rbac_RoleRef(&in.RoleRef)
out.ObjectMeta = in.ObjectMeta
return nil
}
func convert_api_PolicyRules_To_rbac_PolicyRules(in []PolicyRule) []rbac.PolicyRule {
rules := make([]rbac.PolicyRule, 0, len(in))
for _, rule := range in {
// Origin's authorizer's RuleMatches func ignores rules that have AttributeRestrictions.
// Since we know this rule will never be respected in Origin, we do not preserve it during conversion.
if rule.AttributeRestrictions != nil {
continue
}
r := rbac.PolicyRule{
APIGroups: rule.APIGroups,
Verbs: rule.Verbs.List(),
Resources: rule.Resources.List(),
ResourceNames: rule.ResourceNames.List(),
NonResourceURLs: rule.NonResourceURLs.List(),
}
rules = append(rules, r)
}
return rules
}
func convert_api_Subjects_To_rbac_Subjects(in []api.ObjectReference) ([]rbac.Subject, error) {
subjects := make([]rbac.Subject, 0, len(in))
for _, subject := range in {
s := rbac.Subject{
Name: subject.Name,
APIVersion: rbac.GroupName,
}
switch subject.Kind {
case ServiceAccountKind:
s.Kind = rbac.ServiceAccountKind
s.Namespace = subject.Namespace
case UserKind, SystemUserKind:
s.Kind = rbac.UserKind
case GroupKind, SystemGroupKind:
s.Kind = rbac.GroupKind
default:
return nil, fmt.Errorf("invalid kind for origin subject: %q", subject.Kind)
}
subjects = append(subjects, s)
}
return subjects, nil
}
func convert_api_RoleRef_To_rbac_RoleRef(in *api.ObjectReference) rbac.RoleRef {
return rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: getRBACRoleRefKind(in.Namespace),
Name: in.Name,
}
}
// Infers the scope of the kind based on the presence of the namespace
func getRBACRoleRefKind(namespace string) string {
kind := "ClusterRole"
if len(namespace) != 0 {
kind = "Role"
}
return kind
}
func Convert_rbac_ClusterRole_To_api_ClusterRole(in *rbac.ClusterRole, out *ClusterRole, _ conversion.Scope) error {
out.ObjectMeta = in.ObjectMeta
out.Rules = convert_rbac_PolicyRules_To_api_PolicyRules(in.Rules)
return nil
}
func Convert_rbac_Role_To_api_Role(in *rbac.Role, out *Role, _ conversion.Scope) error {
out.ObjectMeta = in.ObjectMeta
out.Rules = convert_rbac_PolicyRules_To_api_PolicyRules(in.Rules)
return nil
}
func Convert_rbac_ClusterRoleBinding_To_api_ClusterRoleBinding(in *rbac.ClusterRoleBinding, out *ClusterRoleBinding, _ conversion.Scope) error {
var err error
if out.Subjects, err = convert_rbac_Subjects_To_api_Subjects(in.Subjects); err != nil {
return err
}
out.RoleRef = convert_rbac_RoleRef_To_api_RoleRef(&in.RoleRef, "")
out.ObjectMeta = in.ObjectMeta
return nil
}
func Convert_rbac_RoleBinding_To_api_RoleBinding(in *rbac.RoleBinding, out *RoleBinding, _ conversion.Scope) error {
var err error
if out.Subjects, err = convert_rbac_Subjects_To_api_Subjects(in.Subjects); err != nil {
return err
}
out.RoleRef = convert_rbac_RoleRef_To_api_RoleRef(&in.RoleRef, in.Namespace)
out.ObjectMeta = in.ObjectMeta
return nil
}
func convert_rbac_Subjects_To_api_Subjects(in []rbac.Subject) ([]api.ObjectReference, error) {
subjects := make([]api.ObjectReference, 0, len(in))
for _, subject := range in {
s := api.ObjectReference{
Name: subject.Name,
}
switch subject.Kind {
case rbac.ServiceAccountKind:
s.Kind = ServiceAccountKind
s.Namespace = subject.Namespace
case rbac.UserKind:
s.Kind = determineUserKind(subject.Name, validation.ValidateUserName)
case rbac.GroupKind:
s.Kind = determineGroupKind(subject.Name, validation.ValidateGroupName)
default:
return nil, fmt.Errorf("invalid kind for rbac subject: %q", subject.Kind)
}
subjects = append(subjects, s)
}
return subjects, nil
}
// rbac.RoleRef has no namespace field since that can be inferred.
// The Origin role ref (api.ObjectReference) requires its namespace value to match the binding's namespace.
// Thus we have to explicitly provide that value as a parameter.
func convert_rbac_RoleRef_To_api_RoleRef(in *rbac.RoleRef, namespace string) api.ObjectReference {
return api.ObjectReference{
Name: in.Name,
Namespace: namespace,
}
}
func convert_rbac_PolicyRules_To_api_PolicyRules(in []rbac.PolicyRule) []PolicyRule {
rules := make([]PolicyRule, 0, len(in))
for _, rule := range in {
r := PolicyRule{
APIGroups: rule.APIGroups,
Verbs: sets.NewString(rule.Verbs...),
Resources: sets.NewString(rule.Resources...),
ResourceNames: sets.NewString(rule.ResourceNames...),
NonResourceURLs: sets.NewString(rule.NonResourceURLs...),
}
rules = append(rules, r)
}
return rules
}