[gnutls-devel] GnuTLS | pkcs8: remove HAVE_LIBOQS ifdef (!1925)

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Mon Jan 20 06:37:58 CET 2025



Daiki Ueno created a merge request: https://gitlab.com/gnutls/gnutls/-/merge_requests/1925

Project:Branches: dueno/gnutls:wip/dueno/lc to gnutls/gnutls:master
Author:   Daiki Ueno




<!-- Add a description of the new feature/bug fix. Reference any relevant bugs. -->

* leancrypto: support leancrypto for post-quantum algorithms

This adds support for leancrypto as an additional and the preferred
backend for now, until Nettle gains the proper support for PQC
algorithms. There are a few advantages over liboqs, namely:

- It already has required input validations for ML-KEM as in FIPS 203,
  such as Modulus check, which are currently missing in liboqs

- It provides an API to generate ML-KEM/ML-DSA key pairs from a seed,
  which is required to support the seed-only private key format proposed
  in draft-ietf-lamps-dilithium-certificates-05 and later

- No need to avoid undesired OpenSSL dependency; all the symmetric
  algorithms are implemented by leancrypto itself

The supposed use-case of this is to statically link to leancrypto,
though that would slightly increase the installation footprint.

Signed-off-by: Daiki Ueno <ueno at gnu.org>

* pkcs8: remove HAVE_LIBOQS ifdefs

The key encoding and decoding operations currently do not use liboqs
functions. Remove unnecessary HAVE_LIBOQS ifdefs so it will be easier
to port to other implementations.

Signed-off-by: Daiki Ueno <ueno at gnu.org>

## Checklist
 * [ ] Commits have `Signed-off-by:` with name/author being identical to the commit author
 * [ ] Code modified for feature
 * [ ] Test suite updated with functionality tests
 * [ ] Test suite updated with negative tests
 * [ ] Documentation updated / NEWS entry present (for non-trivial changes)
 * [ ] CI timeout is 2h or higher (see Settings/CICD/General pipelines/Timeout)

## Reviewer's checklist:
 * [ ] Any issues marked for closing are addressed
 * [ ] There is a test suite reasonably covering new functionality or modifications
 * [ ] Function naming, parameters, return values, types, etc., are consistent and according to `CONTRIBUTION.md`
 * [ ] This feature/change has adequate documentation added
 * [ ] No obvious mistakes in the code

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