Automated Certificate Management Environment (ACME) for Subdomains

This document specifies how Automated Certificate Management Environment (ACME) can be used by a client to obtain a certificate for a subdomain identifier from a certification authority. Additionally, this document specifies how a client can fulfill a challenge against an ancestor domain but may not need to fulfill a challenge against the explicit subdomain if certification authority policy allows issuance of the subdomain certificate without explicit subdomain ownership proof. Stream: RFC: Category: Published: ISSN: Authors: Internet Engineering Task Force (IETF) 9444 Standards Track August 2023 2070-1721 O. Friel Cisco R. Barnes Cisco T. Hollebeek DigiCert M. Richardson Sandelman Software Works Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at . https://www.rfc-editor.org/info/rfc9444 Copyright Notice Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents ( ) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions https://trustee.ietf.org/license-info Friel, et al. Standards Track Page 1 with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of