< draft-ietf-tls-iana-registry-updates-01.txt   draft-ietf-tls-iana-registry-updates-02.txt >
TLS WG J. Salowey TLS WG J. Salowey
Internet-Draft Tableau Software Internet-Draft Tableau Software
Updates: 3749, 5077, 4680, 5246, 5878, S. Turner Updates: 3749, 5077, 4680, 5246, 5705, S. Turner
6520, 7301 (if approved) sn3rd 5878, 6520, 7301 (if approved) sn3rd
Intended status: Standards Track April 28, 2017 Intended status: Standards Track October 30, 2017
Expires: October 30, 2017 Expires: May 3, 2018
D/TLS IANA Registry Updates IANA Registry Updates for TLS and DTLS
draft-ietf-tls-iana-registry-updates-01 draft-ietf-tls-iana-registry-updates-02
Abstract Abstract
This document changes the IANA registry policy for a number of This document describes a number of changes to (D)TLS IANA registries
registries related to DTLS and TLS, renames some of the registries that range from adding notes to the registry all the way to changing
for consistency, and adds notes to many of the registries. As a the registration policy. These changes were mostly motivated by WG
result, this document updates many RFCs (see updates header). review of the (D)TLS-related registries undertaken as part of the
TLS1.3 development process. This document updates many (D)TLS RFCs
(see updates header).
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
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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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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 October 30, 2017. This Internet-Draft will expire on May 3, 2018.
Copyright Notice Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
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publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 2, line 12 skipping to change at page 2, line 13
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Process Note . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Process Note . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Add "TLS" to Registry Names . . . . . . . . . . . . . . . . . 3 3. Add "TLS" to Registry Names . . . . . . . . . . . . . . . . . 3
4. Aligning with RFC 5226 . . . . . . . . . . . . . . . . . . . 4 4. Aligning with RFC 8126 . . . . . . . . . . . . . . . . . . . 3
5. Session Ticket TLS Extension . . . . . . . . . . . . . . . . 4 5. Adding recommended Column . . . . . . . . . . . . . . . . . . 4
6. TLS ExtensionType Values . . . . . . . . . . . . . . . . . . 4 6. Session Ticket TLS Extension . . . . . . . . . . . . . . . . 4
7. TLS Cipher Suite Registry . . . . . . . . . . . . . . . . . . 6 7. TLS ExtensionType Values . . . . . . . . . . . . . . . . . . 4
8. TLS Supported Groups . . . . . . . . . . . . . . . . . . . . 8 8. TLS Cipher Suite Registry . . . . . . . . . . . . . . . . . . 6
9. TLS ClientCertificateType Identifiers . . . . . . . . . . . . 8 9. TLS Supported Groups . . . . . . . . . . . . . . . . . . . . 8
10. New Session Ticket TLS Handshake Message Type . . . . . . . . 8 10. TLS ClientCertificateType Identifiers . . . . . . . . . . . . 9
11. TLS Exporter Label Registry . . . . . . . . . . . . . . . . . 9 11. New Session Ticket TLS Handshake Message Type . . . . . . . . 10
12. Add Missing Item to TLS Alert Registry . . . . . . . . . . . 9 12. TLS Exporter Label Registry . . . . . . . . . . . . . . . . . 10
13. TLS Certificate Types . . . . . . . . . . . . . . . . . . . . 9 13. Add Missing Item to TLS Alert Registry . . . . . . . . . . . 11
14. Orphaned Extensions . . . . . . . . . . . . . . . . . . . . . 10 14. TLS Certificate Types . . . . . . . . . . . . . . . . . . . . 11
15. Orphaned Registries . . . . . . . . . . . . . . . . . . . . . 10 15. Orphaned Extensions . . . . . . . . . . . . . . . . . . . . . 12
16. Designated Expert Pool . . . . . . . . . . . . . . . . . . . 10 16. Orphaned Registries . . . . . . . . . . . . . . . . . . . . . 12
17. Security Considerations . . . . . . . . . . . . . . . . . . . 11 17. Designated Expert Pool . . . . . . . . . . . . . . . . . . . 13
18. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11 18. Security Considerations . . . . . . . . . . . . . . . . . . . 14
19. References . . . . . . . . . . . . . . . . . . . . . . . . . 11 19. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
19.1. Normative References . . . . . . . . . . . . . . . . . . 11 20. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
19.2. Informative References . . . . . . . . . . . . . . . . . 12 20.1. Normative References . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13 20.2. Informative References . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16
1. Process Note 1. Process Note
As the authors of this draft are also the WG chairs, the responsible As the authors of this draft are also the WG chairs, the responsible
Area Director has agreed to judge consensus. Area Director has agreed to judge consensus.
RFC EDITOR: Please delete section prior to publication. RFC EDITOR: Please delete section prior to publication.
2. Introduction 2. Introduction
This document requests that IANA make changes to a number of DTLS- This document instructs IANA to make changes to a number of (D)TLS-
and TLS-related IANA registries. related IANA registries. These changes were almost entirely
motiviated by the development of TLS1.3 [I-D.ietf-tls-tls13].
In this document, we use the term "(D)TLS" to refer to registries
that apply to both TLS and DTLS.
o Add "TLS" to registries' names for consistency amongst TLS-related
registries.
o Change the IANA registry policy [RFC5226] for the TLS
ExtensionType Values, TLS Cipher Suite, and TLS
ClientCertificateType Identifiers registries. These changes
register a small part of these code spaces for experimentation and
private use.
o Add designated expert instructions as notes in the TLS
ExtensionType Values, TLS Cipher Suite, TLS ClientCertificateType
Identifiers, and TLS Exporter Label registries to inform users
about what to expect from the designated expert.
o Add notes to indicate whether an extension, certain values of an
extension, or an entire registry is only applicable pre-(D)TLS
1.3.
o Rename the NewSessionTicket TLS HandshakeType message registry
entry [RFC5077] to new_session_ticket to match the naming
nomenclature for the other Handshake type names and to match with
existing implementations.
o Rename the SessionTicket TLS extension to session_ticket to match
the nomenclature for the other extensions' names.
o Add missing entry to the TLS Alert Registry for the
no_application_protocol alert defined in [RFC7301].
o Added "Recommended" column to TLS ExtensionType Values, TLS Cipher
Suite, TLS Certificate Types, TLS Supported Groups, and TLS
Exporters Label registries. Initial values marked "Yes" are
specified in IETF Standards Track documents; all others are marked
"No". This new column is intended to alter the incorrect
perception that getting a code point somehow legitimizes the
extension, cipher suite/algorithm, or exporter.
o Establish Designated Expert pool rules for Specification Required The changes introduced by this document range from simple, e.g.,
registries. adding notes, to commplex, e.g., changing a registry's registration
policy. Intsead of listing the changes and their rationale in this,
the introducotry, section each section provides rationale for the
proposed change(s).
This document proposes no changes to the registration policies for This document proposes no changes to the registration policies for
TLS Alert [I-D.ietf-tls-tls13], TLS ContentType [I-D.ietf-tls-tls13], TLS Alert [I-D.ietf-tls-tls13], TLS ContentType [I-D.ietf-tls-tls13],
TLS HandshakeType, [I-D.ietf-tls-tls13] and TLS Certificate Status TLS HandshakeType [I-D.ietf-tls-tls13], and TLS Certificate Status
Types [RFC6961]; the existing policies (Standards Action for the Types [RFC6961] registries; the existing policies (Standards Action
first three; IETF Review for the last), are appropriate for these for the first three; IETF Review for the last), are appropriate for
one-byte code points because of their scarcity. these one-byte code points because of their scarcity.
3. Add "TLS" to Registry Names 3. Add "TLS" to Registry Names
IANA is to update the names of the following registries to add "TLS" For consistency amongst TLS reqgistries, IANA [SHALL prepend/has
to for consistency with the other TLS-related extensions: prepended] "TLS" to the following registries:
o Application-Layer Protocol Negotiation (ALPN) Protocol IDs, o Application-Layer Protocol Negotiation (ALPN) Protocol IDs
o ExtensionType Values, [RFC7301],
o Heartbeat Message Types, o ExtensionType Values,
o Heartbeat Modes, and o Heartbeat Message Types [RFC6520], and
o Supported Groups. o Heartbeat Modes [RFC6520].
IANA is also to add a reference to this document for the registry IANA [SHALL update/has updated] the reference for these four
whose names have been updated as a result of the above change. The registires to also refer to this document. The remainder of this
remainder of this document will use the registry names with the "TLS" document will use the registry names with the "TLS" prefix.
prefix.
4. Aligning with RFC 5226 4. Aligning with RFC 8126
Many of the TLS-related IANA registries were defined prior to Many of the TLS-related IANA registries were defined prior to
[RFC5226] where "IETF Consensus" was used instead of the [RFC8126] where "IETF Consensus" was used instead of the
RFC5226-defined "IETF Review". To align with the new terminology, RFC8126-defined "IETF Review". To align with the new terminology,
IANA is to update to use "IETF Review" in place of "IETF Consensus" IANA [SHALL update/has updated] the following registries to use "IETF
in the following registries: Review" in place of "IETF Consensus":
o TLS Authorization Data Formats o TLS Authorization Data Formats [RFC4680]
o TLS Supplemental Data Formats (SupplementalDataType) o TLS Supplemental Data Formats (SupplementalDataType) [RFC5878]
This is not a universal change as some registries originally defined This is not a universal change as some registries originally defined
with "IETF Consensus" are undergoing other changes either as a result with "IETF Consensus" are undergoing other changes either as a result
of this document or [I-D.ietf-tls-rfc4492bis]. of this document or [I-D.ietf-tls-rfc4492bis].
5. Session Ticket TLS Extension IANA [SHALL update/has updated] the reference for these two
registries to also refer to this document.
5. Adding recommended Column
The instructions in this document add a recommended column to many of
the TLS registries to indicate parameters that are generally
recommended for implementations to support. Adding a recommended
parameter to a registry or updating a parameter to recommended status
requires standards action. Not all parameters defined in standards
track documents need to be marked as recommended.
If an item is marked as not recommended it does not necessarily mean
that it is flawed, rather, it indicates that either the item has not
been through the IETF consensus process, has limited applicability,
or is intended only for specific use cases.
6. Session Ticket TLS Extension
The nomenclature for the registry entries in the TLS ExtensionType The nomenclature for the registry entries in the TLS ExtensionType
Values registry correspond to the presentation language field name Values registry correspond to the presentation language field name
except for entry 35. To ensure that the values in the registry are except for entry 35. To ensure that the values in the registry are
consistently identified in the registry, IANA is to rename entry 35 consistently identified in the registry, IANA:
to "session_ticket (renamed from "SessionTicket TLS")".
6. TLS ExtensionType Values o [SHALL rename/has renamed] entry 35 to "session_ticket (renamed
from "SessionTicket TLS")" [RFC5077].
IANA is to update the TLS ExtensionType Values registry as follows: o [SHALL add/has added] a reference to this document in the
Reference column for entry 35.
7. TLS ExtensionType Values
Experience has shown that the IETF Review registry policy for TLS
Extensions was too strict. Based on WG consensus, the decision was
taken to change the registration policy to Specification Required
[RFC8126] while reserving a small part of the code space for
experimental and prviate use. Therefore, IANA [SHALL update/has
updated] the TLS ExtensionType Values registry to:
o Change the registry policy to: o Change the registry policy to:
Values with the first byte in the range 0-254 (decimal) are Values with the first byte in the range 0-254 (decimal) are
assigned via Specification Required [RFC5226]. Values with the assigned via Specification Required [RFC8126]. Values with the
first byte 255 (decimal) are reserved for Private Use [RFC5226]. first byte 255 (decimal) are reserved for Private Use [RFC8126].
o Update the "References" to also refer to this document. o Update the "Reference" to also refer to this document.
o Add the following note: o Add the following note:
Note: Experts are to verify that there is in fact a publicly Note: Experts are to verify that there is in fact a publicly
available standard. available standard.
See Section 17 for additional information about the designated expert
pool.
Despite wanting to "loosen" the registration policies for TLS
Extensions, it is still useful to indicate in the IANA registry which
extensions the WG recommends be supported. Therefore, IANA [SHALL
update/has updated] the TLS ExtensionType Values registry to:
o Add a "Recommended" column with the contents as listed below. o Add a "Recommended" column with the contents as listed below.
This table has been generated by marking Standards Track RFCs as This table has been generated by marking Standards Track RFCs as
"Yes" and all others as "No". Future extensions MUST define the "Yes" and all others as "No". Future extensions MUST define the
value of this column. A Standards Track document [RFC5226] is value of the Recommended column. A Standards Track document
required to register an extension with the value "Yes". [RFC8126] is required to register an extension with the value
"Yes".
+----------------------------------------+-------------+ +----------------------------------------+-------------+
| Extension | Recommended | | Extension | Recommended |
+----------------------------------------+-------------+ +----------------------------------------+-------------+
| server_name | Yes | | server_name | Yes |
| | | | | |
| max_fragment_length | Yes | | max_fragment_length | Yes |
| | | | | |
| client_certificate_url | Yes | | client_certificate_url | Yes |
| | | | | |
skipping to change at page 6, line 23 skipping to change at page 6, line 27
| | | | | |
| encrypt_then_mac | Yes | | encrypt_then_mac | Yes |
| | | | | |
| extended_master_secret | Yes | | extended_master_secret | Yes |
| | | | | |
| session_ticket | Yes | | session_ticket | Yes |
| | | | | |
| renegotiation_info | Yes | | renegotiation_info | Yes |
+----------------------------------------+-------------+ +----------------------------------------+-------------+
7. TLS Cipher Suite Registry 8. TLS Cipher Suite Registry
IANA is to update the TLS Cipher Suite registry as follows: Experience has shown that the IETF Consensus registry policy for TLS
Cipher Suites was too strict. Based on WG consensus, the decision
was taken to change the TLS Cipher Suite registry's registration
policy to Specification Required [RFC8126] while reserving a small
part of the code space for experimental and prviate use. Therefore,
IANA [SHALL update/has updated] the TLS Cipher Suite registry's
policy as follows:
o Change the registry policy to: Values with the first byte in the range 0-254 (decimal) are assigned
via Specification Required {{RFC8126}}. Values with the first byte
255 (decimal) are reserved for Private Use {{RFC8126}}.
Values with the first byte in the range 0-254 (decimal) are See Section 17 for additional information about the designated expert
assigned via Specification Required [RFC5226]. Values with the pool.
first byte 255 (decimal) are reserved for Private Use [RFC2434].
o Add a "Recommended" column to the cipher suite registry. The The cipher suite registry has grown significantly and will continue
to do so. To better guide those not intimately involved in TLS, IANA
[shall update/has updated] the TLS Cipher Suite registry as follows:
o Add a "Recommended" column to the TLS Cipher Suite registry. The
cipher suites that follow in the two tables are marked as "Yes". cipher suites that follow in the two tables are marked as "Yes".
All other cipher suites are marked as "No". Future cipher suites All other cipher suites are marked as "No". Future cipher suites
MUST define the value of the Recommended column. A Standards MUST define the value of the Recommended column. A Standards
Track document [RFC5226] is required to register a cipher suite Track document [RFC8126] is required to register a cipher suite
with the value "Yes". with the value "Yes".
o Update the reference for this registry to also point to this The cipher suites that follow are standards track server-
document. authenticated (and optionally client-authenticated) cipher suites
which are currently available in TLS 1.2.
The cipher suites that follow are standards track server-
authenticated (and optionally client-authenticated) cipher suites
which are currently available in TLS 1.2. The notable exception are
the ECDHE AES GCM cipher suites which are not yet standards track
prior to the publication of this specification, but this document
promotes those 4 cipher suites to standards track (see TO-DO insert
reference).
RFC EDITOR: Please delete the sentence beginning with "The notable RFC EDITOR: The previous paragraph is for document reviewers and is
exception ..." after RFC 5289 has been promoted to Proposed Standard. not meant for the registry.
Cipher Suite Name | Value Cipher Suite Name | Value
----------------------------------------------+------------ ----------------------------------------------+------------
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 | {0x00,0x9E} TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 | {0x00,0x9E}
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 | {0x00,0x9F} TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 | {0x00,0x9F}
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | {0xC0,0x2B} TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | {0xC0,0x2B}
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 | {0xC0,0x2C} TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 | {0xC0,0x2C}
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | {0xC0,0x2F} TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | {0xC0,0x2F}
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 | {0xC0,0x30} TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 | {0xC0,0x30}
TLS_DHE_RSA_WITH_AES_128_CCM | {0xC0,0x9E} TLS_DHE_RSA_WITH_AES_128_CCM | {0xC0,0x9E}
TLS_DHE_RSA_WITH_AES_256_CCM | {0xC0,0x9F} TLS_DHE_RSA_WITH_AES_256_CCM | {0xC0,0x9F}
TLS_DHE_RSA_WITH_AES_128_CCM_8 | {0xC0,0xA2}
TLS_DHE_RSA_WITH_AES_256_CCM_8 | {0xC0,0xA3}
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xA8} TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xA8}
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xA9} TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xA9}
TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAA} TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAA}
The cipher suites that follow are standards track ephemeral pre- The cipher suites that follow are standards track ephemeral pre-
shared key cipher suites which are available in TLS 1.2. [RFC6655] shared key cipher suites which are available in TLS 1.2. [RFC6655]
is inconsistent with respect to the ordering of components within PSK is inconsistent with respect to the ordering of components within PSK
AES CCM cipher suite names; those names are used here without AES CCM cipher suite names; those names are used here without
modification. modification.
RFC EDITOR: The previous paragraph is for document reviewers and is
not meant for the registry.
Cipher Suite Name | Value Cipher Suite Name | Value
----------------------------------------------+------------ ----------------------------------------------+------------
TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 | {0x00,0xAA} TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 | {0x00,0xAA}
TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 | {0x00,0xAB} TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 | {0x00,0xAB}
TLS_DHE_PSK_WITH_AES_128_CCM | {0xC0,0xA6} TLS_DHE_PSK_WITH_AES_128_CCM | {0xC0,0xA6}
TLS_DHE_PSK_WITH_AES_256_CCM | {0xC0,0xA7} TLS_DHE_PSK_WITH_AES_256_CCM | {0xC0,0xA7}
TLS_PSK_DHE_WITH_AES_128_CCM_8 | {0xC0,0xAA}
TLS_PSK_DHE_WITH_AES_256_CCM_8 | {0xC0,0xAB}
TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256 | {TBD} TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256 | {TBD}
TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384 | {TBD} TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384 | {TBD}
TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256 | {TBD}
TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256 | {TBD} TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256 | {TBD}
TLS_ECDHE_PSK_WITH_AES_256_CCM_SHA384 | {TBD} TLS_ECDHE_PSK_WITH_AES_256_CCM_SHA384 | {TBD}
TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAC} TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAC}
TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAD} TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256 | {0xCC,0xAD}
o Add the following: Despite the following behavior being crazy, experience has shown that
some customers use the IANA registry as checklist against which to
measure an implemention's completeness and some implementers blindly
implement cipher suites. Therefore, IANA [SHALL add/has added] the
following warning to the registry:
WARNING: Cryptographic algorithms will be broken or weakened over WARNING: Cryptographic algorithms and parameters will be broken or
time. Blindly implementing cipher suites listed here is not weakened over time. Blindly implementing cipher suites listed
advised. Implementers and users need to check that the here is not advised. Implementers and users need to check that
cryptographic algorithms listed continue to provide the expected the cryptographic algorithms listed continue to provide the
level of security. expected level of security.
Note(1): Although TLS 1.3 uses the same cipher suite space as IANA [SHALL add/has added] the following note to ensure that those
previous versions of TLS, TLS 1.3 cipher suites are defined that focus on IANA registries are aware that TLS 1.3
differently, only specifying the symmetric ciphers, and cannot be [I-D.ietf-tls-tls13] uses the same registry but defines ciphers
used for TLS 1.2. Similarly, TLS 1.2 and lower cipher suites differently:
cannot be used with TLS 1.3.
Note(2): Cipher suites marked as "Yes" are those allocated via Note: Although TLS 1.3 uses the same cipher suite space as previous
versions of TLS, TLS 1.3 cipher suites are defined differently,
only specifying the symmetric ciphers, and cannot be used for TLS
1.2. Similarly, TLS 1.2 and lower cipher suite values cannot be
used with TLS 1.3.
IANA [SHALL add/has added] the following notes to document the rules
for populating the Recommended column:
Note: Cipher suites marked as "Yes" are those allocated via
Standards Track RFCs. Cipher suites marked as "No" are not; Standards Track RFCs. Cipher suites marked as "No" are not;
cipher suites marked "No" range from "good" to "bad" from a cipher suites marked "No" range from "good" to "bad" from a
cryptographic standpoint. cryptographic standpoint.
Note(3): The designated expert [RFC5226] only ensures that the Note: CCM_8 cipher suites are not marked as Recommended. These
cipher suites have a significantly truncated authentication tag
that represents a security trade-off that may not be appropriate
for general environments.
Note: The designated expert [RFC8126] only ensures that the
specification is publicly available. specification is publicly available.
8. TLS Supported Groups IANA [SHALL uppdate/has updated] the reference for this registry to
also refer to this document.
Add a "Recommended" column with a "Yes" for secp256r1, secp384r1, 9. TLS Supported Groups
x25519, and x448 while all others are "No". These "Yes" groups are
taken from Standards Track RFCs. Not all groups from Similar to cipher suites, supported groups have proliferated over
[I-D.ietf-tls-rfc4492bis], which is standards track, are not marked time and some use the registry to measure implementations.
as "Yes"; these groups apply to TLS 1.3 [I-D.ietf-tls-tls13] and Therefore, IANA [SHALL add/has added] a "Recommended" column with a
previous versions of TLS [I-D.ietf-tls-tls13]. A Standards Track "Yes" for secp256r1, secp384r1, x25519, and x448 while all others are
document [RFC5226] is required to register an entry with the value "No". These "Yes" groups are taken from Standards Track RFCs. Not
all groups from [I-D.ietf-tls-rfc4492bis], which is standards track,
are marked as "Yes"; these groups apply to TLS 1.3
[I-D.ietf-tls-tls13] and previous versions of TLS. Future supported
groups MUST define the value of this column. A Standards Track
document [RFC8126] is required to register an entry with the value
"Yes". "Yes".
9. TLS ClientCertificateType Identifiers IANA [SHALL add/has added] the following note:
IANA is to update the TLS ClientCertificateType Identifiers registry Note: Supported Groups marked as "Yes" are those allocated via
as follows: Standards Track RFCs. Supported Groups marked as "No" are not;
supported groups marked "No" range from "good" to "bad" from a
cryptographic standpoint.
o Change the registry policy to: Note: The designated expert [RFC8126] only ensures that the
specification is publicly available.
Values in the range 0-223 are assigned via Specification Required Despite the following behavior being crazy, experience has shown that
[RFC5226]. Values 224-255 are reserved for Private Use. some customers use the IANA registry as checklist against which to
measure an implemention's completeness and some implementers blindly
implement cipher supported. Therefore, IANA [SHALL add/has added]
the following warning to the registry:
o Add the following: WARNING: Cryptographic algorithms and parameters will be broken or
weakened over time. Blindly implementing cipher suites listed
here is not advised. Implementers and users need to check that
the cryptographic algorithms listed continue to provide the
expected level of security.
Note: The designated expert [RFC5226] only ensures that the IANA [SHALL update/has updated] the reference for this registry to
also refer to this document.
The value 0 (0x0000) is to be marked as reserved.
10. TLS ClientCertificateType Identifiers
Experience has shown that the IETF Consensus registry policy for TLS
ClientCertificateType Identifers is too strict. Based on WG
consensus, the decision was taken to change registration policy to
Specification Required [RFC8126] while reserving a small part of the
code space for experimental and prviate use. Therefore, IANA [SHALL
update/has updated] the TLS Cipher Suite registry's policy as
follows:
Values in the range 0-223 are assigned via Specification Required
{{RFC8126}}. Values 224-255 are reserved for Private Use.
See Section 17 for additional information about the designated expert
pool.
IANA [SHALL add/has added] the following notes:
Note: The designated expert [RFC8126] only ensures that the
specification is publicly available. specification is publicly available.
10. New Session Ticket TLS Handshake Message Type Note: ClientCertificateType Identifers marked as "Yes" are those
allocated via Standards Track RFCs. ClientCertificateTypes marked
as "No" are not.
11. New Session Ticket TLS Handshake Message Type
To align with TLS implementations and to align the naming To align with TLS implementations and to align the naming
nomenclature for other Handshake message types, IANA is to rename nomenclature with other Handshake message types, IANA:
entry 4 in the TLS HandshakeType registry to "new_session_ticket
(renamed from NewSessionTicket)". IANA is to also add a reference to
this document in the Reference column for entry 4 in the TLS
HandshakeType registry.
11. TLS Exporter Label Registry o [SHALL rename/has renamed] entry 4 in the TLS HandshakeType
registry to "new_session_ticket (renamed from NewSessionTicket)"
[RFC5077].
IANA is to add the following note to the TLS Exporter Label Registry: o [SHALL add/has added] a reference to this document in the
Reference column for entry 4 in the TLS HandshakeType registry.
Note: {{RFC5705}} defines keying material exporters for TLS in terms of the TLS PRF. {{I-D.ietf-tls-tls13}} replaced the PRF with HKDF, thus requiring a new construction. The exporter interface remains the same, however the value is computed different. 12. TLS Exporter Label Registry
IANA is to also to add a "Recommended" column to the TLS Exporter To aid those reviewers who start with the IANA registry, IANA [SHALL
Label registry. The table that follows has been generated by marking add/has added]:
Standards Track RFCs as "Yes" and all others as "No". Future
exporters MUST define the value of this column. A Standards Track
document [RFC5226] is required to register an extension with the
value "Yes".
IANA is also to add the following note: o The following note to the TLS Exporter Label Registry:
Note: The designated expert {{RFC5226}} ensures that the specification is publicly available. The expert also verifies that the label is a string consisting of printable ASCII characters beginning with "EXPORTER". IANA MUST also verify that one label is not a prefix of any other label. For example, labels "key" or "master secretary" are forbidden. Note: [RFC5705] defines keying material exporters for TLS in terms
of the TLS PRF. [I-D.ietf-tls-tls13] replaced the PRF with HKDF,
thus requiring a new construction. The exporter interface remains
the same, however the value is computed different.
o A "Recommended" column to the TLS Exporter Label registry. The
table that follows has been generated by marking Standards Track
RFCs as "Yes" and all others as "No". Future exporters MUST
define the value of this column. A Standards Track document
[RFC8126] is required to register an extension with the value
"Yes".
Exporter Value Exporter Value
------------------------------- -------------------------------
client finished client finished
server finished server finished
master secret master secret
key expansion key expansion
client EAP encryption client EAP encryption
ttls keying material ttls keying material
ttls challenge ttls challenge
EXTRACTOR-dtls_srtp EXTRACTOR-dtls_srtp
EXPORTER_DTLS_OVER_SCTP EXPORTER_DTLS_OVER_SCTP
EXPORTER: teap session key seed EXPORTER: teap session key seed
12. Add Missing Item to TLS Alert Registry To provide additional information for the designated experts, IANA
[SHALL add/has added] the following note:
IANA is to add the following entry to the TLS Alert Registry (the Note: The designated expert [RFC8126] ensures that the specification
entry was omitted from the IANA instructions in [RFC7301]): is publicly available. The expert also verifies that the label is
a string consisting of printable ASCII characters beginning with
"EXPORTER". IANA MUST also verify that one label is not a prefix
of any other label. For example, labels "key" or "master
secretary" are forbidden.
Note: Exporters Labels marked as "Yes" are those allocated via
Standards Track RFCs. Exporter Labels marked as "No" are not.
IANA [SHALL update/has updated] the reference for this registry to
also refer to this document.
13. Add Missing Item to TLS Alert Registry
IANA [SHALL add/has added] the following entry to the TLS Alert
Registry; the entry was omitted from the IANA instructions in
[RFC7301]):
120 no_application_protocol Y [RFC7301] 120 no_application_protocol Y [RFC7301]
13. TLS Certificate Types 14. TLS Certificate Types
Add a "Recommended" column to the registry. X.509 and Raw Public Key Experience has shown that the IETF Consensus registry policy for TLS
are "Yes". All others are "No". A Standards Track document Certificate Types is too strict. Based on WG consensus, the decision
[RFC5226] is required to register a certificate type with the value was taken to change registration policy to Specification Required
"Yes". [RFC8126] while reserving a small part of the code space for
experimental and prviate use. Therefore, IANA [SHALL add/has added]
a "Recommended" column to the registry. X.509 and Raw Public Key are
"Yes". All others are "No". A Standards Track document [RFC8126] is
required to register a certificate type with the value "Yes". Future
Certificate Types MUST define the value of this column. A Standards
Track document [RFC8126] is required to register an entry with the
value "Yes".
14. Orphaned Extensions See Section 17 for additional information about the designated expert
pool.
IANA [SHALL add/has added] the following note:
Note: Certificate Types marked as "Yes" are those allocated via
Standards Track RFCs. Certificate Types marked as "No" are not.
IANA [SHALL update/has updated] the reference for this registry to
also refer this document.
15. Orphaned Extensions
To make it clear that (D)TLS 1.3 has orphaned certain extensions To make it clear that (D)TLS 1.3 has orphaned certain extensions
(i.e., they are only applicable to version of (D)TLS prior to 1.3), (i.e., some extensions are only applicable to version of (D)TLS prior
IANA is to add the following to the TLS ExtensionType Values to 1.3), IANA [SHALL add/has added] the following note to the TLS
registry: ExtensionType Values registry:
Note: The following extensions are only applicable to (D)TLS protocol vesions prior to 1.3: trusted_ca_keys, truncated_hmac, ec_point_formats, srp, status_request_v2, encrypt_then_mac, extended_master_secret, session_ticket, and renegotiation_info. These are not applicable to DTLS 1.3. Note: The following extensions are only applicable to (D)TLS
protocol vesions prior to 1.3: trusted_ca_keys, truncated_hmac,
ec_point_formats, srp, status_request_v2, encrypt_then_mac,
extended_master_secret, session_ticket, and renegotiation_info.
These extensions are not applicable to (D)TLS 1.3.
15. Orphaned Registries 16. Orphaned Registries
To make it clear that (D)TLS 1.3 has orphaned certain registries To make it clear that (D)TLS 1.3 has orphaned certain registries
(i.e., they are only applicable to version of (D)TLS protocol (i.e., they are only applicable to version of (D)TLS protocol
versions prior to 1.3), IANA is to: versions prior to 1.3), IANA:
o Add the following to the TLS Compression Method Identifiers o [SHALL add/has added] the following to the TLS Compression Method
registry [RFC3749]: Identifiers registry [RFC3749]:
Note: Value 0 (NULL) is the only value in this registry applicable Note: Value 0 (NULL) is the only value in this registry applicable
to (D)TLS protocol version 1.3 or later. to (D)TLS protocol version 1.3 or later.
o Add the following to the TLS HashAlgorithm [RFC5246] and TLS o [SHALL add/has added] the following to the TLS HashAlgorithm
SignatureAlgorithm registries [RFC5246]: [RFC5246] and TLS SignatureAlgorithm registries [RFC5246]:
Note: The values in this registry are only applicable to (D)TLS Note: The values in this registry are only applicable to (D)TLS
protocol versions prior to 1.3. protocol versions prior to 1.3.
o Update the "References" in the TLS Compression Method Identifiers, o [SHALL update/has updated] the "Reference" field in the TLS
TLS HashAlgorithm [RFC5246] and TLS SignatureAlgorithm registries Compression Method Identifiers, TLS HashAlgorithm and TLS
to also refer to this document. SignatureAlgorithm registries to also refer to this document.
IANA [SHALL update/has updated] the TLS HashAlgorithm Registry to o [SHALL update/has updated] the TLS HashAlgorithm Registry to list
list values 7-223 as "Reserved" and the TLS SignatureAlgorithm values 7-223 as "Reserved" and the TLS SignatureAlgorithm registry
registry to list values 4-223 as "Reserved". to list values 4-223 as "Reserved".
16. Designated Expert Pool Despite the fact that the HashAlgorithm and SignarureAlgorithm
registries are orphaned, it is still import to warn implementers of
pre-TLS1.3 implmentations about the dangers of blinding implementing
cryptographic algorithms. Therefore, IANA [SHALL add/has added] the
following warning to the HashAlgorithm and SignatureAlgorithm:
Specification Required [RFC5226] registry requests are registered WARNING: Cryptographic algorithms and parameters will be broken or
weakened over time. Blindly implementing cipher suites listed
here is not advised. Implementers and users need to check that
the cryptographic algorithms listed continue to provide the
expected level of security.
17. Designated Expert Pool
Specification Required [RFC8126] registry requests are registered
after a three-week review period on the (tbd but maybe tls-reg- after a three-week review period on the (tbd but maybe tls-reg-
review@ietf.org) mailing list, on the advice of one or more review@ietf.org) mailing list, on the advice of one or more
Designated Experts. However, to allow for the allocation of values Designated Experts. However, to allow for the allocation of values
prior to publication, the Designated Experts may approve registration prior to publication, the Designated Experts may approve registration
once they are satisfied that such a specification will be published. once they are satisfied that such a specification will be published.
Registration requests sent to the mailing list for review SHOULD use Registration requests sent to the mailing list for review SHOULD use
an appropriate subject (e.g., "Request to register value in TLS bar an appropriate subject (e.g., "Request to register value in TLS bar
registry"). registry").
skipping to change at page 11, line 31 skipping to change at page 14, line 13
list. list.
It is suggested that multiple Designated Experts be appointed who are It is suggested that multiple Designated Experts be appointed who are
able to represent the perspectives of different applications using able to represent the perspectives of different applications using
this specification, in order to enable broadly informed review of this specification, in order to enable broadly informed review of
registration decisions. In cases where a registration decision could registration decisions. In cases where a registration decision could
be perceived as creating a conflict of interest for a particular be perceived as creating a conflict of interest for a particular
Expert, that Expert SHOULD defer to the judgment of the other Expert, that Expert SHOULD defer to the judgment of the other
Experts. Experts.
17. Security Considerations 18. Security Considerations
The authors are fairly certain that there are no security The change to Specification Required from IETF Review lowers the
considerations for this document. amount of review provided by the WG for cipher suites and supported
groups. This change reflects reality in that the WG essentially
provided no cryptographic review of the cipher suites or supported
groups. This was especially true of national cipher suites.
18. IANA Considerations Recommended algorithms regarded as secure for general use at the time
of registration, however, cryptographic algorithms and parameters
will be broken or weakened over time. It is possible that the
recommended status in the registry lags behind the most recent
advances in cryptanalysis. Implementers and users need to check that
the cryptographic algorithms listed continue to provide the expected
level of security.
Designated experts ensure the specification is publicly available.
They may provide more in depth reviews. Their review should not be
taken as an endorsement of the cipher suite, extension, supported
group, etc.
19. IANA Considerations
This document is entirely about changes to TLS-related IANA This document is entirely about changes to TLS-related IANA
registries. registries.
19. References 20. References
19.1. Normative References 20.1. Normative References
[I-D.ietf-tls-tls13] [I-D.ietf-tls-tls13]
Rescorla, E., "The Transport Layer Security (TLS) Protocol Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", draft-ietf-tls-tls13-19 (work in progress), Version 1.3", draft-ietf-tls-tls13-21 (work in progress),
March 2017. July 2017.
[RFC3749] Hollenbeck, S., "Transport Layer Security Protocol [RFC3749] Hollenbeck, S., "Transport Layer Security Protocol
Compression Methods", RFC 3749, DOI 10.17487/RFC3749, May Compression Methods", RFC 3749, DOI 10.17487/RFC3749, May
2004, <http://www.rfc-editor.org/info/rfc3749>. 2004, <https://www.rfc-editor.org/info/rfc3749>.
[RFC4680] Santesson, S., "TLS Handshake Message for Supplemental [RFC4680] Santesson, S., "TLS Handshake Message for Supplemental
Data", RFC 4680, DOI 10.17487/RFC4680, October 2006, Data", RFC 4680, DOI 10.17487/RFC4680, October 2006,
<http://www.rfc-editor.org/info/rfc4680>. <https://www.rfc-editor.org/info/rfc4680>.
[RFC5077] Salowey, J., Zhou, H., Eronen, P., and H. Tschofenig, [RFC5077] Salowey, J., Zhou, H., Eronen, P., and H. Tschofenig,
"Transport Layer Security (TLS) Session Resumption without "Transport Layer Security (TLS) Session Resumption without
Server-Side State", RFC 5077, DOI 10.17487/RFC5077, Server-Side State", RFC 5077, DOI 10.17487/RFC5077,
January 2008, <http://www.rfc-editor.org/info/rfc5077>. January 2008, <https://www.rfc-editor.org/info/rfc5077>.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226,
DOI 10.17487/RFC5226, May 2008,
<http://www.rfc-editor.org/info/rfc5226>.
[RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security [RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security
(TLS) Protocol Version 1.2", RFC 5246, (TLS) Protocol Version 1.2", RFC 5246,
DOI 10.17487/RFC5246, August 2008, DOI 10.17487/RFC5246, August 2008, <https://www.rfc-
<http://www.rfc-editor.org/info/rfc5246>. editor.org/info/rfc5246>.
[RFC5705] Rescorla, E., "Keying Material Exporters for Transport [RFC5705] Rescorla, E., "Keying Material Exporters for Transport
Layer Security (TLS)", RFC 5705, DOI 10.17487/RFC5705, Layer Security (TLS)", RFC 5705, DOI 10.17487/RFC5705,
March 2010, <http://www.rfc-editor.org/info/rfc5705>. March 2010, <https://www.rfc-editor.org/info/rfc5705>.
[RFC5878] Brown, M. and R. Housley, "Transport Layer Security (TLS) [RFC5878] Brown, M. and R. Housley, "Transport Layer Security (TLS)
Authorization Extensions", RFC 5878, DOI 10.17487/RFC5878, Authorization Extensions", RFC 5878, DOI 10.17487/RFC5878,
May 2010, <http://www.rfc-editor.org/info/rfc5878>. May 2010, <https://www.rfc-editor.org/info/rfc5878>.
[RFC6520] Seggelmann, R., Tuexen, M., and M. Williams, "Transport [RFC6520] Seggelmann, R., Tuexen, M., and M. Williams, "Transport
Layer Security (TLS) and Datagram Transport Layer Security Layer Security (TLS) and Datagram Transport Layer Security
(DTLS) Heartbeat Extension", RFC 6520, (DTLS) Heartbeat Extension", RFC 6520,
DOI 10.17487/RFC6520, February 2012, DOI 10.17487/RFC6520, February 2012, <https://www.rfc-
<http://www.rfc-editor.org/info/rfc6520>. editor.org/info/rfc6520>.
[RFC6655] McGrew, D. and D. Bailey, "AES-CCM Cipher Suites for [RFC6655] McGrew, D. and D. Bailey, "AES-CCM Cipher Suites for
Transport Layer Security (TLS)", RFC 6655, Transport Layer Security (TLS)", RFC 6655,
DOI 10.17487/RFC6655, July 2012, DOI 10.17487/RFC6655, July 2012, <https://www.rfc-
<http://www.rfc-editor.org/info/rfc6655>. editor.org/info/rfc6655>.
[RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan, [RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan,
"Transport Layer Security (TLS) Application-Layer Protocol "Transport Layer Security (TLS) Application-Layer Protocol
Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301, Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301,
July 2014, <http://www.rfc-editor.org/info/rfc7301>. July 2014, <https://www.rfc-editor.org/info/rfc7301>.
19.2. Informative References [RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for
Writing an IANA Considerations Section in RFCs", BCP 26,
RFC 8126, DOI 10.17487/RFC8126, June 2017,
<https://www.rfc-editor.org/info/rfc8126>.
20.2. Informative References
[I-D.ietf-tls-rfc4492bis] [I-D.ietf-tls-rfc4492bis]
Nir, Y., Josefsson, S., and M. Pegourie-Gonnard, "Elliptic Nir, Y., Josefsson, S., and M. Pegourie-Gonnard, "Elliptic
Curve Cryptography (ECC) Cipher Suites for Transport Layer Curve Cryptography (ECC) Cipher Suites for Transport Layer
Security (TLS) Versions 1.2 and Earlier", draft-ietf-tls- Security (TLS) Versions 1.2 and Earlier", draft-ietf-tls-
rfc4492bis-16 (work in progress), March 2017. rfc4492bis-17 (work in progress), May 2017.
[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", RFC 2434,
DOI 10.17487/RFC2434, October 1998,
<http://www.rfc-editor.org/info/rfc2434>.
[RFC6961] Pettersen, Y., "The Transport Layer Security (TLS) [RFC6961] Pettersen, Y., "The Transport Layer Security (TLS)
Multiple Certificate Status Request Extension", RFC 6961, Multiple Certificate Status Request Extension", RFC 6961,
DOI 10.17487/RFC6961, June 2013, DOI 10.17487/RFC6961, June 2013, <https://www.rfc-
<http://www.rfc-editor.org/info/rfc6961>. editor.org/info/rfc6961>.
Authors' Addresses Authors' Addresses
Joe Salowey Joe Salowey
Tableau Software Tableau Software
Email: joe@salowey.net Email: joe@salowey.net
Sean Turner Sean Turner
sn3rd sn3rd
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