crypto_hash_sha512
int crypto_hash_sha512(unsigned char *, const unsigned char *,
crypto_hash_sha512(az,sk,32);
crypto_hash_sha512(az,sk,32);
crypto_hash_sha512(nonce, sm+32, mlen+32);
crypto_hash_sha512(hram,sm,mlen + 64);
crypto_hash_sha512(hram,m,smlen);
crypto_hash_sha512(sha2pass, pass, passlen);
crypto_hash_sha512(sha2salt, countsalt, saltlen + 4);
crypto_hash_sha512(sha2salt, tmpout, sizeof(tmpout));
crypto_hash_sha512(h, x, inlen + 1);