draft-ietf-regext-epp-eai-01.txt   draft-ietf-regext-epp-eai-02.txt 
Network Working Group D. Belyavskiy Network Working Group D. Belyavskiy
Internet-Draft Internet-Draft
Intended status: Standards Track J. Gould Intended status: Standards Track J. Gould
Expires: 26 January 2022 VeriSign, Inc. Expires: 9 February 2022 VeriSign, Inc.
25 July 2021 8 August 2021
Use of Internationalized Email Addresses in EPP protocol Use of Internationalized Email Addresses in EPP protocol
draft-ietf-regext-epp-eai-01 draft-ietf-regext-epp-eai-02
Abstract Abstract
This document describes an EPP extension that permits usage of This document describes an EPP extension that permits usage of
Internationalized Email Addresses in the EPP protocol and specifies Internationalized Email Addresses in the EPP protocol and specifies
the terms when it can be used by EPP clients and servers. The the terms when it can be used by EPP clients and servers. The
Extensible Provisioning Protocol (EPP), being developed before Extensible Provisioning Protocol (EPP), being developed before
appearing the standards for Internationalized Email Addresses (EAI), appearing the standards for Internationalized Email Addresses (EAI),
does not support such email addresses. does not support such email addresses.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
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time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on 26 January 2022. This Internet-Draft will expire on 9 February 2022.
Copyright Notice Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/ Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
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2. Migrating to Newer Versions of This Extension . . . . . . . . 3 2. Migrating to Newer Versions of This Extension . . . . . . . . 3
3. Email Address Specification . . . . . . . . . . . . . . . . . 3 3. Email Address Specification . . . . . . . . . . . . . . . . . 3
4. Functional Extension . . . . . . . . . . . . . . . . . . . . 4 4. Functional Extension . . . . . . . . . . . . . . . . . . . . 4
5. Internationalized Email Addresses (EAI) Functional 5. Internationalized Email Addresses (EAI) Functional
Extension . . . . . . . . . . . . . . . . . . . . . . . . 4 Extension . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. Scope of Functional Extension . . . . . . . . . . . . . . 4 5.1. Scope of Functional Extension . . . . . . . . . . . . . . 4
5.2. Signaling Client and Server Support . . . . . . . . . . . 5 5.2. Signaling Client and Server Support . . . . . . . . . . . 5
5.3. Functional Extension Behavior . . . . . . . . . . . . . . 5 5.3. Functional Extension Behavior . . . . . . . . . . . . . . 5
5.3.1. EAI Functional Extension Negotiated . . . . . . . . . 5 5.3.1. EAI Functional Extension Negotiated . . . . . . . . . 5
5.3.2. EAI Functional Extension Not Negotiated . . . . . . . 6 5.3.2. EAI Functional Extension Not Negotiated . . . . . . . 6
5.3.3. EAI Placeholder Email Address . . . . . . . . . . . . 7
6. Security Considerations . . . . . . . . . . . . . . . . . . . 7 6. Security Considerations . . . . . . . . . . . . . . . . . . . 7
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
7.1. XML Namespace . . . . . . . . . . . . . . . . . . . . . . 7 7.1. XML Namespace . . . . . . . . . . . . . . . . . . . . . . 7
7.2. EPP Extension Registry . . . . . . . . . . . . . . . . . 8 7.2. EPP Extension Registry . . . . . . . . . . . . . . . . . 7
8. Implementation Considerations . . . . . . . . . . . . . . . . 8 8. Implementation Considerations . . . . . . . . . . . . . . . . 8
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 8 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
9.1. Normative References . . . . . . . . . . . . . . . . . . 8 9.1. Normative References . . . . . . . . . . . . . . . . . . 8
9.2. Informative References . . . . . . . . . . . . . . . . . 9 9.2. Informative References . . . . . . . . . . . . . . . . . 9
Appendix A. Change History . . . . . . . . . . . . . . . . . . . 10 Appendix A. Change History . . . . . . . . . . . . . . . . . . . 9
A.1. Change from 00 to 01 . . . . . . . . . . . . . . . . . . 10 A.1. Change from 00 to 01 . . . . . . . . . . . . . . . . . . 9
A.2. Change from 01 to 02 . . . . . . . . . . . . . . . . . . 10 A.2. Change from 01 to 02 . . . . . . . . . . . . . . . . . . 9
A.3. Change from 02 to 03 . . . . . . . . . . . . . . . . . . 10 A.3. Change from 02 to 03 . . . . . . . . . . . . . . . . . . 10
A.4. Change from 03 to 04 . . . . . . . . . . . . . . . . . . 10 A.4. Change from 03 to 04 . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 11 A.5. Change from 04 to the regext 01 version . . . . . . . . . 10
A.6. Change from the regext 01 to regext 02 version . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction 1. Introduction
[RFC6530] introduced the framework for Internationalized Email [RFC6530] introduced the framework for Internationalized Email
Addresses. To make such addresses more widely accepted, the changes Addresses. To make such addresses more widely accepted, the changes
to various protocols need to be introduced. to various protocols need to be introduced.
This document describes an Extensible Provisioning Protocol (EPP) This document describes an Extensible Provisioning Protocol (EPP)
extension that permits usage of Internationalized Email Addresses in extension that permits usage of Internationalized Email Addresses in
the EPP protocol and specifies the terms when it can be used by EPP the EPP protocol and specifies the terms when it can be used by EPP
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The lack of EAI support can cause data and functional issues, so an The lack of EAI support can cause data and functional issues, so an
EAI supporting client or server needs to handle cases where the EAI supporting client or server needs to handle cases where the
opposite party doesn't support EAI. Below are the server and client opposite party doesn't support EAI. Below are the server and client
obligations when the EAI extension is not negotiated due to the lack obligations when the EAI extension is not negotiated due to the lack
of support by the peer. of support by the peer.
The EAI supporting server MUST satisfy the following obligations when The EAI supporting server MUST satisfy the following obligations when
the client does not support the EAI extension: the client does not support the EAI extension:
* When the email property is required in the EPP extension command, * When the email property is required in the EPP response, the
the server SHOULD validate the email property sent by the client server SHOULD validate the email property sent by the client using
using the ASCII email validation rules. the ASCII email validation rules.
* When the email property is optional according the EPP extension * When the email property is optional according the EPP response, if
command, if the client supplies the email property the server the client supplies the email property the server SHOULD validate
SHOULD validate the email property using the ASCII email the email property using the ASCII email validation rules.
validation rules.
* When the email property is required in the EPP extension response, * When the email property is required in the EPP response, the
the server MUST validate whether the email property is an EAI server MUST validate whether the email property is an EAI address
address and if so return the predefined placeholder email (see and if so return the error code 2308 "Data management policy
below) and otherwise return the email property that has been set. violation" and otherwise return the email property that has been
set.
* When the email property is optional in the EPP extension response, * When the email property is optional in the EPP response, the
the server MUST validate whether the email property is an EAI server MUST validate whether the email property is an EAI address
address and if so don't return the email property in the response and if so don't return the email property in the response and
and otherwise return the email property that has been set based on otherwise return the email property that has been set based on
server policy. server policy.
The EAI supporting client MUST satisfy the following obligations when The EAI supporting client MUST satisfy the following obligations when
the server does not support the EAI extension: the server does not support the EAI extension:
* When the email property is required in the EPP extension command * When the email property is required in the EPP request and the
and the email property is an EAI address with no alternative ASCII email property is an EAI address, the client MUST provide the
address, the client MUST provide the predefined placeholder email ASCII email address. The provided email address should provide a
address (see below). way to contact the registrant. It can be a secondary ASCII email
address or registrar-provided proxy email address.
* When the email property is optional in the EPP extension command * When the email property is optional in the EPP request and the
and the email property is an EAI address with no alternative ASCII email property is an EAI address with no alternative ASCII
address, the client SHOULD omit the email property. address, the client SHOULD omit the email property.
5.3.3. EAI Placeholder Email Address
A valid email value needs to be provided to a non-EAI supporting
client or server to satisfy a required email property when all that
is available is an EAI value. To satisfy this requirement, a
predefined placeholder email needs to be selected that meets the
requirements:
* A syntactically valid email address to pass client or server
validation logic.
* A non-EAI email address since the client or server doesn't support
EAI email addresses.
* A single value that can indicate the lack of EAI support to the
client or server.
* An email address that is blackholed and never delivered.
* Use of the email address will not cause operational issues.
RFC 7535 [RFC7535] defines a blackholed domain name with
EMPTY.AS112.ARPA, which can be leveraged for the EAI predefined
placeholder email. The proposal is to define the predefined
placeholder email value as EAI@EMPTY.AS112.ARPA.
6. Security Considerations 6. Security Considerations
Registries SHOULD validate the domain names in the provided email Registries SHOULD validate the domain names in the provided email
addresses. This can be done by validating all code points according addresses. This can be done by validating all code points according
to IDNA2008 [RFC5892]. to IDNA2008 [RFC5892].
7. IANA Considerations 7. IANA Considerations
7.1. XML Namespace 7.1. XML Namespace
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2119 Key Words", BCP 14, RFC 8174, DOI 10.27487/RFC8174, 2119 Key Words", BCP 14, RFC 8174, DOI 10.27487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
9.2. Informative References 9.2. Informative References
[RFC5892] Faltstrom, P., Ed., "The Unicode Code Points and [RFC5892] Faltstrom, P., Ed., "The Unicode Code Points and
Internationalized Domain Names for Applications (IDNA)", Internationalized Domain Names for Applications (IDNA)",
RFC 5892, DOI 10.27487/RFC5892, August 2010, RFC 5892, DOI 10.27487/RFC5892, August 2010,
<https://www.rfc-editor.org/info/rfc5892>. <https://www.rfc-editor.org/info/rfc5892>.
[RFC7535] Abley, J., Dickson, B., Kumari, W., and G. Michaelson,
"AS112 Redirection Using DNAME", RFC 7535,
DOI 10.17487/RFC7535, May 2015,
<https://www.rfc-editor.org/info/rfc7535>.
[RFC8543] Zhou, L., Kong, N., Yao, J., Gould, J., and G. Zhou, [RFC8543] Zhou, L., Kong, N., Yao, J., Gould, J., and G. Zhou,
"Extensible Provisioning Protocol (EPP) Organization "Extensible Provisioning Protocol (EPP) Organization
Mapping", RFC 8543, DOI 10.27487/RFC8543, March 2019, Mapping", RFC 8543, DOI 10.27487/RFC8543, March 2019,
<https://www.rfc-editor.org/info/rfc8543>. <https://www.rfc-editor.org/info/rfc8543>.
Appendix A. Change History Appendix A. Change History
A.1. Change from 00 to 01 A.1. Change from 00 to 01
1. Changed from update of RFC 5733 to use the "Placeholder Text and 1. Changed from update of RFC 5733 to use the "Placeholder Text and
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Extension. Extension.
2. The examples are removed 2. The examples are removed
A.4. Change from 03 to 04 A.4. Change from 03 to 04
1. More detailed reference to email syntax is provided 1. More detailed reference to email syntax is provided
2. The shortened eai namespace reference is removed 2. The shortened eai namespace reference is removed
A.5. Change from 04 to the regext 01 version
1. Provided the recommended placeholder value
A.6. Change from the regext 01 to regext 02 version
1. Removed the concept of the placeholder value
Authors' Addresses Authors' Addresses
Dmitry Belyavskiy Dmitry Belyavskiy
8 marta st. 8 marta st.
Moscow Moscow
127083 127083
Russian Federation Russian Federation
Phone: +7 916 262 5593 Phone: +7 916 262 5593
Email: beldmit@gmail.com Email: beldmit@gmail.com
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