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Tobias Frauenschläger
044f08c0ea
Extend the wolfSSL Zephyr module for the wolfPSA-provider and secure-sockets
efforts:
- Native RTOS threading: wolfCrypt's Zephyr port uses k_mutex/k_thread/
k_condvar directly (no CONFIG_POSIX_THREADS), with k_condvar gated on the
kernel version, covered by a native-threading ztest wired into CI.
- Config interface: a user-supplied CONFIG_WOLFSSL_SETTINGS_FILE is
authoritative and the module never layers Kconfig #defines over it. The
module-default block is shaped by build-profile knobs (WOLFSSL_CRYPTO_ONLY,
WOLFSSL_SINGLE_THREADED, which now defaults from !MULTITHREADING) plus new
classic-crypto/TLS/PQC feature knobs (RSA/ECC/ChaCha-Poly/Curve25519/SNI/
session-cache/session-ticket and ML-KEM/ML-DSA/LMS/XMSS/Falcon, each with
its memory-reduction "small" options). A consumer such as wolfPSA validates
its own requirements rather than the module injecting them.
- DRBG seeding: wc_GenerateSeed() on Zephyr draws seed material from the
hardware entropy driver when present (chunked to the entropy API's uint16_t
length, DT_HAS_CHOSEN-guarded) and falls back to sys_rand_get() otherwise;
HAVE_HASHDRBG stays guarded by WC_NO_HASHDRBG.
- z_time(): read the native_sim simulator RTC for a real wall clock on the
native targets regardless of libc.
Verified on native_sim/native/64 and nucleo_h743zi.