kdf_derive
return kdf_derive(kctx, prk, prklen, EVP_KDF_HKDF_MODE_EXTRACT_ONLY,
return kdf_derive(kctx, okm, okmlen, EVP_KDF_HKDF_MODE_EXPAND_ONLY,
OSSL_CORE_MAKE_FUNC(int, kdf_derive, (void *kctx, unsigned char *key, size_t keylen, const OSSL_PARAM params[]))
{ OSSL_FUNC_KEYEXCH_DERIVE, (void (*)(void))kdf_derive }, \
static OSSL_FUNC_keyexch_derive_fn kdf_derive;