RFC 9115, "An Automatic Certificate Management Environment (ACME) Profile for Generating Delegated Certificates", September 2021

Errata ID: 7336
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Carsten Bormann
Date Reported: 2023-02-06

Section Appendix A says:

   oid = text .regexp "([0-2])((\.0)|(\.[1-9][0-9]*))*"

It should say:

   oid = text .regexp "([0-2])((\\.0)|(\\.[1-9][0-9]*))*"

Notes:

Backslashes need to be doubled in CDDL strings (as they are done in Appendix B).

An alternative fix would be to replace \\. by [.]

Note that the equivalent fix is not required for

regtext = text .regexp "([^\*].*)|([\*][^\*].*)|([\*][\*].+)"

as the fact that the single backslashes have no effect is irrelevant here — the backslashes are not needed in the character classes [...].
As an editorial enhancement, the backslashes could be entirely removed from this line.

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