random_split_ec_verify
ret = random_split_ec_verify(sig_tmp1, siglen, &(kp.pub_key), msg, msglen,
ret = random_split_ec_verify(sig, siglen, &(kp.pub_key), msg, msglen,
ret = random_split_ec_verify(sig, siglen, pub_key, (const u8 *)(c->msg), c->msglen,