Add NID_X25519 and NID_X448 support to the EVP layer

[julek-wolfssl]

No description provided.

[Copilot]

Pull request overview

Adds X25519 (Curve25519) and X448 (Curve448) support to the OpenSSL-compatibility EVP layer so callers can use these algorithms via EVP_PKEY for raw-key import, key generation, and ECDH key derivation.

Changes:

• Extend WOLFSSL_EVP_PKEY struct with curve25519/curve448 member pointers plus ownCurve25519/ownCurve448 ownership bits, and add WC_EVP_PKEY_X25519/X448 enum values mapped to the corresponding WC_NID_* constants.
• Wire X25519/X448 into wolfSSL_EVP_PKEY_new_raw_public_key, wolfSSL_EVP_PKEY_new_raw_private_key, wolfSSL_EVP_PKEY_keygen, wolfSSL_EVP_PKEY_derive, wolfSSL_EVP_PKEY_size, and wolfSSL_EVP_PKEY_free, using little-endian RFC 7748 conventions and the existing per-PKEY RNG (with wc_curve25519_set_rng blinding when enabled).
• Add test_wolfSSL_EVP_PKEY_x25519 / test_wolfSSL_EVP_PKEY_x448 unit tests covering raw import length checks, sign rejection, key generation, and symmetric ECDH agreement; register them in TEST_EVP_PKEY_DECLS.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
wolfssl/ssl.h	Add curve25519/curve448 pointer fields and ownership bitfields on WOLFSSL_EVP_PKEY.
wolfssl/openssl/evp.h	Add WC_EVP_PKEY_X25519/X448 enum values and EVP_PKEY_X25519/X448 compat macros.
wolfcrypt/src/evp.c	Implement X25519/X448 handling in keygen, derive, size, free; widen derive's enabling guard.
wolfcrypt/src/evp_pk.c	Implement raw public/private key import for X25519/X448 with length checks and ownership tracking.
tests/api/test_evp_pkey.h	Declare and register the two new test cases.
tests/api/test_evp_pkey.c	New unit tests exercising raw import, sign rejection, keygen and ECDH symmetry.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

retest this please