RFC Errata
RFC 5116, "An Interface and Algorithms for Authenticated Encryption", January 2008
Source of RFC: IETF - NON WORKING GROUPArea Assignment: sec
Errata ID: 6415
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Jordan Smith
Date Reported: 2021-01-29
Section 3.2 says:
Implementations SHOULD support 12-octet nonces in which the Counter field is four octets long.
It should say:
Implementations SHOULD support 12-octet nonces in which the Fixed field is four octets long.
Notes:
The ascii diagram given shows the Fixed portion being smaller and the examples given in https://tools.ietf.org/id/draft-mcgrew-iv-gen-01.html also show that the Fixed portion is 4 bytes.
Also an 8 byte counter gives 2^64, where a 4 byte counter would only give 2^32