ACME IP Identifier Validation Extension
draft-ietf-acme-ip-02

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Last updated 2018-05-18
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ACME Working Group                                          R. Shoemaker
Internet-Draft                                                      ISRG
Intended status: Standards Track                            May 18, 2018
Expires: November 19, 2018

                ACME IP Identifier Validation Extension
                         draft-ietf-acme-ip-02

Abstract

   This document specifies identifiers and challenges required to enable
   the Automated Certificate Management Environment (ACME) to issue
   certificates for IP addresses.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   This Internet-Draft will expire on November 19, 2018.

Copyright Notice

   Copyright (c) 2018 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  IP Identifier . . . . . . . . . . . . . . . . . . . . . . . .   2
   4.  Identifier Validation Challenges  . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  Identifier Types  . . . . . . . . . . . . . . . . . . . .   3
     5.2.  Challenge Types . . . . . . . . . . . . . . . . . . . . .   3
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   3
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   3
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   The Automatic Certificate Management Environment (ACME)
   [I-D.ietf-acme-acme] only defines challenges for validating control
   of DNS host name identifiers which limits its use to being used for
   issuing certificates for DNS identifiers.  In order to allow
   validation of IPv4 and IPv6 identifiers for inclusion in X.509
   certificates this document specifies how challenges defined in the
   original ACME specification can be used to validate IP identifiers.

2.  Terminology

   In this document, the key words "MUST", "MUST NOT", "REQUIRED",
   "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY",
   and "OPTIONAL" are to be interpreted as described in BCP 14,
   [RFC2119].

3.  IP Identifier

   [I-D.ietf-acme-acme] only defines the identifier type "dns" which is
   used to refer to fully qualified domain names.  If a ACME server
   wishes to request proof that a user controls a IPv4 or IPv6 address
   it MUST create an authorization with the identifier type "ip".  The
   value field of the identifier MUST contain the textual form of the
   address as defined in [RFC1123] Section 2.1 for IPv4 and in [RFC4291]
   Section 2.2 for IPv6.

   An identifier for the IPv6 address 2001:db8::1 would be formatted
   like so:

   {"type": "ip", "value": "2001:db8::1"}

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4.  Identifier Validation Challenges

   IP identifiers MAY be used with the existing "http-01" and "tls-sni-
   02" challenges from [I-D.ietf-acme-acme] Sections 8.3 and 8.4
   respectively.  To use IP identifiers with these challenges their
   initial DNS resolution step MUST be skipped and the IP address used
   for validation MUST be the value of the identifier.  For the "http-
   01" challenge the Host header MUST be set to the IP address being
   used for validation per [RFC7230].

   The existing "dns-01" challenge MUST NOT be used to validate IP
   identifiers.

5.  IANA Considerations
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