ECDSA_do_sign
ECDSA_SIG *ECDSA_do_sign(const unsigned char *digest, int digest_len,
if ((sig = ECDSA_do_sign(digest, digest_len, key)) == NULL)
LCRYPTO_ALIAS(ECDSA_do_sign);
LCRYPTO_USED(ECDSA_do_sign);
if ((sig = ECDSA_do_sign(sighash, sizeof(sighash), ec)) == NULL) {