d2i_KeyParams
ret = d2i_KeyParams(type, a, &p, len);
pkey = d2i_KeyParams(pkey_id, NULL, &blob, len);
tmp_pkey = d2i_KeyParams(pkey_id, NULL, &tmp_blob, len);
EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,
pkey = d2i_KeyParams(itype, NULL, &datap, data_len);