_rsassa_pss_sign
return _rsassa_pss_sign(priv, NULL, m, mlen, s, slen, modbits, gen_hash_type, mgf_hash_type, saltlen, forced_salt);
return _rsassa_pss_sign(priv, pub, m, mlen, s, slen, modbits, gen_hash_type, mgf_hash_type, saltlen, forced_salt);