Secure Patterns for Internet CrEdentials B. Maldant
Internet-Draft SimpleLogin
Intended status: Informational 23 April 2025
Expires: 25 October 2025
OpenID Connect standard claims registration for CBOR Web Tokens
draft-ietf-spice-oidc-cwt-00
Abstract
This document registers OpenId Connect standards claims already used
in JSON Web Tokens for CBOR Web Tokens.
About This Document
This note is to be removed before publishing as an RFC.
The latest revision of this draft can be found at
https://beltram.github.io/rfc-spice-oidc-cwt/draft-ietf-spice-oidc-
cwt.html. Status information for this document may be found at
https://datatracker.ietf.org/doc/draft-ietf-spice-oidc-cwt/.
Discussion of this document takes place on the Secure Patterns for
Internet CrEdentials Working Group mailing list
(mailto:spice@ietf.org), which is archived at
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https://www.ietf.org/mailman/listinfo/spice/.
Source for this draft and an issue tracker can be found at
https://github.com/beltram/rfc-spice-oidc-cwt.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 25 October 2025.
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Copyright Notice
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Please review these documents carefully, as they describe your rights
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 3
3. Address claim . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5.1. name . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.2. given_name . . . . . . . . . . . . . . . . . . . . . . . 4
5.3. family_name . . . . . . . . . . . . . . . . . . . . . . . 4
5.4. middle_name . . . . . . . . . . . . . . . . . . . . . . . 5
5.5. nickname . . . . . . . . . . . . . . . . . . . . . . . . 5
5.6. preferred_username . . . . . . . . . . . . . . . . . . . 5
5.7. profile . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.8. picture . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.9. website . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.10. email . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.11. email_verified . . . . . . . . . . . . . . . . . . . . . 7
5.12. gender . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.13. birthdate . . . . . . . . . . . . . . . . . . . . . . . . 8
5.14. zoneinfo . . . . . . . . . . . . . . . . . . . . . . . . 8
5.15. locale . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.16. phone_number . . . . . . . . . . . . . . . . . . . . . . 9
5.17. phone_number_verified . . . . . . . . . . . . . . . . . . 9
5.18. address . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.19. updated_at . . . . . . . . . . . . . . . . . . . . . . . 10
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1. Normative References . . . . . . . . . . . . . . . . . . 10
6.2. Informative References . . . . . . . . . . . . . . . . . 11
Appendix A. CDDL Schema . . . . . . . . . . . . . . . . . . . . 11
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 11
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1. Introduction
OpenId Connect [OIDCCore] is an authentication standard including
standard claims already in use for JSON Web Tokens (JWT) [RFC7519].
CBOR Web Tokens (CWT) [RFC8392] have a claims registry, but do not
include most of these claims. This draft aims at unifying use of
OIDC claims in JWTs and CWTs.
2. Conventions and Definitions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
3. Address claim
In order to further reduce the size of this prevalent and large
claim, we register integer labels for it. We strictly map the
definition of claims in Section 5.1.1 of [OIDCCore]: all the claims
are optional and "formatted" can either be used instead or in
addition of all the other fields.
4. Security Considerations
This document registers existing OpenID Connect standard claims
already used in JSON Web Tokens [RFC7519] for use in CBOR Web Tokens
[RFC8392] without changing their semantics. The Security and Privacy
Considerations respectively of Sections 16 and 17 of [OIDCCore] also
apply.
5. IANA Considerations
All claims defined in this document are placed in the (CBOR Web Token
(CWT) Claims) [IANA.CWT.Claims] Registry (part of the eponymous
registry group). No new IANA registry is created.
In case any of the suggested code points would have been claimed by
the time the IESG approves the document for publication as an RFC,
IANA is asked to assign Claim Key values from the 170-256 range.
5.1. name
* Claim Name: name
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* Claim Description: End-User's full name in displayable form
including all name parts, possibly including titles and suffixes,
ordered according to the End-User's locale and preferences.
* JWT Claim Name: name
* Claim Key: TBD1 (170 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.2. given_name
* Claim Name: given_name
* Claim Description: Given name(s) or first name(s) of the End-User.
* JWT Claim Name: given_name
* Claim Key: TBD2 (171 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.3. family_name
* Claim Name: family_name
* Claim Description: Surname(s) or last name(s) of the End-User.
* JWT Claim Name: family_name
* Claim Key: TBD3 (172 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
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5.4. middle_name
* Claim Name: middle_name
* Claim Description: Middle name(s) of the End-User.
* JWT Claim Name: middle_name
* Claim Key: TBD4 (173 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.5. nickname
* Claim Name: nickname
* Claim Description: Casual name of the End-User that may or may not
be the same as the given_name.
* JWT Claim Name: nickname
* Claim Key: TBD5 (174 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.6. preferred_username
* Claim Name: preferred_username
* Claim Description: Shorthand name by which the End-User wishes to
be referred to at the Resource Server.
* JWT Claim Name: preferred_username
* Claim Key: TBD6 (175 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
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* Specification Document(s): Section 5.1 of [OIDCCore]
5.7. profile
* Claim Name: profile
* Claim Description: URL of the End-User's profile page.
* JWT Claim Name: profile
* Claim Key: TBD7 (176 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.8. picture
* Claim Name: picture
* Claim Description: URL of the End-User's profile picture. This
URL MUST refer to an image file, rather than to a Web page
containing an image.
* JWT Claim Name: picture
* Claim Key: TBD8 (177 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.9. website
* Claim Name: website
* Claim Description: URL of the End-User's Web page or blog.
* JWT Claim Name: website
* Claim Key: TBD9 (178 suggested)
* Claim Value Type(s): text string
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* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.10. email
* Claim Name: email
* Claim Description: End-User's preferred e-mail address.
* JWT Claim Name: email
* Claim Key: TBD10 (179 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.11. email_verified
* Claim Name: email_verified
* Claim Description: True if the End-User's e-mail address has been
verified; otherwise false.
* JWT Claim Name: email_verified
* Claim Key: TBD11 (180 suggested)
* Claim Value Type(s): bool
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.12. gender
* Claim Name: gender
* Claim Description: End-User's defined gender.
* JWT Claim Name: gender
* Claim Key: TBD12 (181 suggested)
* Claim Value Type(s): text string
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* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.13. birthdate
* Claim Name: birthdate
* Claim Description: End-User's birthday, represented as an
[ISO8601_1] YYYY-MM-DD format.
* JWT Claim Name: birthdate
* Claim Key: TBD13 (182 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.14. zoneinfo
* Claim Name: zoneinfo
* Claim Description: String from IANA Time Zone Database
[IANAtimezones] representing the End-User's time zone.
* JWT Claim Name: zoneinfo
* Claim Key: TBD14 (183 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.15. locale
* Claim Name: locale
* Claim Description: End-User's locale, represented as a BCP47
[RFC5646] language tag.
* JWT Claim Name: locale
* Claim Key: TBD15 (184 suggested)
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* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.16. phone_number
* Claim Name: phone_number
* Claim Description: End-User's preferred telephone number.
* JWT Claim Name: phone_number
* Claim Key: TBD16 (185 suggested)
* Claim Value Type(s): text string
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.17. phone_number_verified
* Claim Name: phone_number_verified
* Claim Description: True if the End-User's phone number has been
verified; otherwise false.
* JWT Claim Name: phone_number_verified
* Claim Key: TBD17 (186 suggested)
* Claim Value Type(s): bool
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.18. address
* Claim Name: address
* Claim Description: End-User's preferred postal address.
* JWT Claim Name: address
* Claim Key: TBD18 (187 suggested)
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* Claim Value Type(s): map
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
5.19. updated_at
* Claim Name: updated_at
* Claim Description: Time the End-User's information was last
updated. Its value is a number representing the number of seconds
from 1970-01-01T00:00:00Z as measured in UTC until the date/time.
* JWT Claim Name: updated_at
* Claim Key: TBD19 (188 suggested)
* Claim Value Type(s): uint
* Change Controller: IETF
* Specification Document(s): Section 5.1 of [OIDCCore]
6. References
6.1. Normative References
[IANA.CWT.Claims]
IANA, "CBOR Web Token (CWT) Claims",
<https://www.iana.org/assignments/cwt>.
[IANAtimezones]
"IANA time zones", n.d.,
<https://www.iana.org/time-zones>.
[ISO8601_1]
"ISO8601-1", n.d.,
<https://www.iso.org/standard/81801.html>.
[OIDCCore] Sakimura, N., Bradley, J., Jones, M. B., Medeiros, B. de.,
and C. Mortimore, "OpenID Connect Core 1.0 incorporating
errata set 2", 15 December 2023,
<https://openid.net/specs/openid-connect-core-1_0.html>.
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[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/rfc/rfc2119>.
[RFC5646] Phillips, A., Ed. and M. Davis, Ed., "Tags for Identifying
Languages", BCP 47, RFC 5646, DOI 10.17487/RFC5646,
September 2009, <https://www.rfc-editor.org/rfc/rfc5646>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.
[RFC8392] Jones, M., Wahlstroem, E., Erdtman, S., and H. Tschofenig,
"CBOR Web Token (CWT)", RFC 8392, DOI 10.17487/RFC8392,
May 2018, <https://www.rfc-editor.org/rfc/rfc8392>.
6.2. Informative References
[RFC7519] Jones, M., Bradley, J., and N. Sakimura, "JSON Web Token
(JWT)", RFC 7519, DOI 10.17487/RFC7519, May 2015,
<https://www.rfc-editor.org/rfc/rfc7519>.
Appendix A. CDDL Schema
{::include ./oidc-claims.cddl}
Figure 1: A CDDL description of each claim
Author's Address
Beltram Maldant
SimpleLogin
Email: beltram.ietf@pm.me
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