/
util.go
57 lines (49 loc) · 2.06 KB
/
util.go
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package serviceaccount
import (
"fmt"
"strings"
apimachineryvalidation "k8s.io/apimachinery/pkg/api/validation"
)
const (
ServiceAccountUsernamePrefix = "system:serviceaccount:"
ServiceAccountUsernameSeparator = ":"
ServiceAccountGroupPrefix = "system:serviceaccounts:"
AllServiceAccountsGroup = "system:serviceaccounts"
)
// MakeUsername generates a username from the given namespace and ServiceAccount name.
// The resulting username can be passed to SplitUsername to extract the original namespace and ServiceAccount name.
func MakeUsername(namespace, name string) string {
return ServiceAccountUsernamePrefix + namespace + ServiceAccountUsernameSeparator + name
}
var invalidUsernameErr = fmt.Errorf("Username must be in the form %s", MakeUsername("namespace", "name"))
// SplitUsername returns the namespace and ServiceAccount name embedded in the given username,
// or an error if the username is not a valid name produced by MakeUsername
func SplitUsername(username string) (string, string, error) {
if !strings.HasPrefix(username, ServiceAccountUsernamePrefix) {
return "", "", invalidUsernameErr
}
trimmed := strings.TrimPrefix(username, ServiceAccountUsernamePrefix)
parts := strings.Split(trimmed, ServiceAccountUsernameSeparator)
if len(parts) != 2 {
return "", "", invalidUsernameErr
}
namespace, name := parts[0], parts[1]
if len(apimachineryvalidation.ValidateNamespaceName(namespace, false)) != 0 {
return "", "", invalidUsernameErr
}
if len(apimachineryvalidation.ValidateServiceAccountName(name, false)) != 0 {
return "", "", invalidUsernameErr
}
return namespace, name, nil
}
// MakeGroupNames generates service account group names for the given namespace and ServiceAccount name
func MakeGroupNames(namespace, name string) []string {
return []string{
AllServiceAccountsGroup,
MakeNamespaceGroupName(namespace),
}
}
// MakeNamespaceGroupName returns the name of the group all service accounts in the namespace are included in
func MakeNamespaceGroupName(namespace string) string {
return ServiceAccountGroupPrefix + namespace
}