_rsa_iso9796_2_sign_recover
return _rsa_iso9796_2_sign_recover(priv, NULL, m, mlen, m1len, m2len, s, slen, modbits, gen_hash_type);
return _rsa_iso9796_2_sign_recover(priv, pub, m, mlen, m1len, m2len, s, slen, modbits, gen_hash_type);