FIPS 205, SLH-DSA: implementation

[SparkiDev]

Description

Adding implementation of SLH-DSA.
Some tests added.

Testing

Regression tested SLH-DSA including:
--enable-slhdsa
--enable-slhdsa=yes,verify-only
--enable-slhdsa=yes,small
--enable-intelasm

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[SparkiDev]

retest this please

[Copilot]

Pull request overview

Adds initial SLH-DSA (FIPS 205) support to wolfCrypt, wiring it into build systems, benchmarks, and both unit/API tests.

Changes:

• Introduces the SLH-DSA public API header and integrates SLH-DSA into core build/packaging (autotools/CMake) and CI configs.
• Adds SLH-DSA coverage to wolfcrypt test runner plus dedicated API unit tests.
• Adds SLH-DSA benchmark support and extends SHA3 AVX2 assembly gating for SLH-DSA builds.

Reviewed changes

Copilot reviewed 17 out of 22 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
wolfssl/wolfcrypt/wc_slhdsa.h	New public SLH-DSA API header, parameter constants, key struct and function prototypes.
wolfssl/wolfcrypt/types.h	Adds DYNAMIC_TYPE_SLHDSA for memory tracking.
wolfssl/wolfcrypt/include.am	Installs the new wc_slhdsa.h header.
wolfcrypt/test/test.h	Declares slhdsa_test() for the wolfcrypt test runner.
wolfcrypt/test/test.c	Hooks SLH-DSA into test execution and adds SLH-DSA test vectors / sign-verify tests.
wolfcrypt/src/sha3_asm.S	Enables SHA3 AVX2 multi-block symbols when SLH-DSA is enabled.
wolfcrypt/src/poly1305_asm.asm	Comment header formatting change.
wolfcrypt/src/chacha_asm.asm	Comment header formatting change.
wolfcrypt/src/aes_xts_asm.asm	Comment header formatting change.
wolfcrypt/src/aes_gcm_asm.asm	Comment header formatting change.
wolfcrypt/benchmark/benchmark.h	Adds SLH-DSA benchmark prototype.
wolfcrypt/benchmark/benchmark.c	Adds SLH-DSA benchmark flags/CLI options and implements bench_slhdsa().
tests/api/test_slhdsa.h	New API test declarations for SLH-DSA.
tests/api/test_slhdsa.c	New API unit tests for init, sizing, keygen, sign/verify, hash-signing, import/export, checkkey.
tests/api/include.am	Adds SLH-DSA API tests to automake build and dist.
tests/api.c	Registers SLH-DSA API tests in the test case list.
src/include.am	Adds wolfcrypt/src/wc_slhdsa.c to library sources under BUILD_WC_SLHDSA.
configure.ac	Adds --enable-slhdsa handling, flags, and BUILD_WC_SLHDSA conditional.
CMakeLists.txt	Adds CMake option for WOLFSSL_HAVE_SLHDSA and includes SLH-DSA API test source.
.wolfssl_known_macro_extras	Adds SLH-DSA-related macro names to the known-macro list.
.github/workflows/pq-all.yml	Enables SLH-DSA in PQ CI matrix configurations.

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[SparkiDev]

retest this please