from nx_crypto_ecdh.h:102
UINT _nx_crypto_ecdh_setup(NX_CRYPTO_ECDH *ecdh_ptr,
UCHAR *local_public_key_ptr,
ULONG local_public_key_len_ptr,
ULONG *actual_local_public_key_len,
NX_CRYPTO_EC *curve,
HN_UBASE *scratch_buf_ptr);
Implemented in nx_crypto_ecdh.c:254