internal static extern int crypto_hash_sha512_update( ref crypto_hash_sha512_state state, in byte @in,
internal static extern int crypto_hash_sha512_init( out crypto_hash_sha512_state state);
internal static extern int crypto_hash_sha512_update( ref crypto_hash_sha512_state state, ref uint @in, ulong inlen);
internal static extern int crypto_hash_sha512_final( ref crypto_hash_sha512_state state, ref byte @out);
internal static extern int crypto_hash_sha512_final( ref crypto_hash_sha512_state state, SecureMemoryHandle @out);