[gnutls-devel] GnuTLS | Draft: Support building with Nettle 4 (!2075)

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Thu Feb 26 04:30:23 CET 2026



Daiki Ueno created a merge request: https://gitlab.com/gnutls/gnutls/-/merge_requests/2075

Project:Branches: dueno/gnutls:wip/dueno/nettle-4 to gnutls/gnutls:master
Author:   Daiki Ueno



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

* rnd-fips: use Nettle 4 digest interface

We should switch to the drbg-ctr-aes256 module provided by Nettle.

* tls1-prf: use Nettle 4 digest interface

* nettle: support Nettle 4 cipher interface

* nettle: support Nettle 4 hash and MAC interfaces

* dsa-fips: omit digest_size argument for sha384_digest with Nettle 4

* accelerated: provide compatibility macro for GCM_DIGEST

* accelerated: give up on defining nettle HMAC interface

Nettle 4 doesn't provide a way to define custom HMAC instances.

* nettle: include <nettle/sha[12].h> instead of deprecated <nettle/sha.h>

* nettle: use SHA*_BLOCK_SIZE instead of deprecated SHA*_DATA_SIZE

## Checklist
 * [x] 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)

## 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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