126 lines
4.1 KiB
Go
126 lines
4.1 KiB
Go
/*
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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 serviceaccount
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import (
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"fmt"
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"strings"
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"k8s.io/apiserver/pkg/authentication/user"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/api/validation/genericvalidation"
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)
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const (
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ServiceAccountUsernamePrefix = "system:serviceaccount:"
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ServiceAccountUsernameSeparator = ":"
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ServiceAccountGroupPrefix = "system:serviceaccounts:"
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AllServiceAccountsGroup = "system:serviceaccounts"
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)
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// MakeUsername generates a username from the given namespace and ServiceAccount name.
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// The resulting username can be passed to SplitUsername to extract the original namespace and ServiceAccount name.
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func MakeUsername(namespace, name string) string {
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return ServiceAccountUsernamePrefix + namespace + ServiceAccountUsernameSeparator + name
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}
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var invalidUsernameErr = fmt.Errorf("Username must be in the form %s", MakeUsername("namespace", "name"))
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// SplitUsername returns the namespace and ServiceAccount name embedded in the given username,
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// or an error if the username is not a valid name produced by MakeUsername
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func SplitUsername(username string) (string, string, error) {
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if !strings.HasPrefix(username, ServiceAccountUsernamePrefix) {
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return "", "", invalidUsernameErr
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}
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trimmed := strings.TrimPrefix(username, ServiceAccountUsernamePrefix)
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parts := strings.Split(trimmed, ServiceAccountUsernameSeparator)
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if len(parts) != 2 {
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return "", "", invalidUsernameErr
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}
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namespace, name := parts[0], parts[1]
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if len(genericvalidation.ValidateNamespaceName(namespace, false)) != 0 {
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return "", "", invalidUsernameErr
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}
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if len(genericvalidation.ValidateServiceAccountName(name, false)) != 0 {
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return "", "", invalidUsernameErr
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}
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return namespace, name, nil
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}
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// MakeGroupNames generates service account group names for the given namespace and ServiceAccount name
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func MakeGroupNames(namespace, name string) []string {
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return []string{
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AllServiceAccountsGroup,
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MakeNamespaceGroupName(namespace),
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}
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}
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// MakeNamespaceGroupName returns the name of the group all service accounts in the namespace are included in
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func MakeNamespaceGroupName(namespace string) string {
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return ServiceAccountGroupPrefix + namespace
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}
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// UserInfo returns a user.Info interface for the given namespace, service account name and UID
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func UserInfo(namespace, name, uid string) user.Info {
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return &user.DefaultInfo{
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Name: MakeUsername(namespace, name),
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UID: uid,
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Groups: MakeGroupNames(namespace, name),
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}
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}
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// IsServiceAccountToken returns true if the secret is a valid api token for the service account
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func IsServiceAccountToken(secret *v1.Secret, sa *v1.ServiceAccount) bool {
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if secret.Type != v1.SecretTypeServiceAccountToken {
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return false
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}
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name := secret.Annotations[v1.ServiceAccountNameKey]
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uid := secret.Annotations[v1.ServiceAccountUIDKey]
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if name != sa.Name {
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// Name must match
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return false
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}
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if len(uid) > 0 && uid != string(sa.UID) {
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// If UID is specified, it must match
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return false
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}
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return true
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}
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// TODO: remove the duplicate code
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// InternalIsServiceAccountToken returns true if the secret is a valid api token for the service account
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func InternalIsServiceAccountToken(secret *api.Secret, sa *api.ServiceAccount) bool {
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if secret.Type != api.SecretTypeServiceAccountToken {
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return false
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}
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name := secret.Annotations[api.ServiceAccountNameKey]
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uid := secret.Annotations[api.ServiceAccountUIDKey]
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if name != sa.Name {
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// Name must match
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return false
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}
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if len(uid) > 0 && uid != string(sa.UID) {
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// If UID is specified, it must match
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return false
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}
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return true
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}
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