pwhash method
Implementation
@override
Uint8List pwhash(String passphrase, Uint8List salt) {
return sodium.crypto_pwhash(
sodium.crypto_box_SEEDBYTES as int,
Uint8List.fromList(passphrase.codeUnits),
salt,
4,
33554432,
sodium.crypto_pwhash_ALG_ARGON2I13 as int);
}