[TLS] [Technical Errata Reported] RFC8446 (8411)

[RFC Errata System <[e-mail]>]

The following errata report has been submitted for RFC8446,
"The Transport Layer Security (TLS) Protocol Version 1.3".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid8411

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Type: Technical
Reported by: Albin Johansson <[e-mail]>

Section: 4.2.7

Original Text
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struct {
    NamedGroup named_group_list<2..2^16-1>;
} NamedGroupList;

Corrected Text
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struct {
    NamedGroup named_group_list<2..2^16-2>;
} NamedGroupList;

Notes
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The specified maximum legal length of the named_group_list vector in the NamedGroupList structure is 2^16-1 bytes. This is invalid because NamedGroup is an enum that occupies two bytes, but 2^16-1 is not an exact multiple of the element size (2 bytes), as required in Section 3.4. It appears that the intended upper bound should be 2^16-2 bytes instead.

Instructions:
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RFC8446 (draft-ietf-tls-tls13-28)
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Title               : The Transport Layer Security (TLS) Protocol Version 1.3
Publication Date    : August 2018
Author(s)           : E. Rescorla
Category            : PROPOSED STANDARD
Source              : Transport Layer Security
Stream              : IETF
Verifying Party     : IESG