Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

[Defect]: CMAC missing key length

Open
#866 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
48/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Domain
cryptography

Research direction

Locate the cryptography registry entry for the CMAC definition and read the surrounding algorithm naming rules. Update the specification so CMAC's key length is explicit and distinct from the MAC length, then verify the resulting registry wording is consistent with nearby entries.

Written by the indexing model from the issue text.

Description

cap: cryptography-registry defect

Describe the defect

In the cryptography registry, CMAC is defined as CMAC[-{cipherAlgorithm}][-{length}]. It does not explicitly list the key length (which could be 128, 192, or 256).

Additional context

Presumably length is supposed to be the MAC length, so I did not consider that to be the key length.

Dominant language
XSLT
Stars
551
Forks
93
Avg merge
4h 51m
Merged PRs (30d)
42

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from CycloneDX/specification

All issues in CycloneDX/specification

Similar issues

More Cryptography issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.