Login fails using caching_sha2_password

[4UjwXc]

If a password with more than 18 characters is used, the login to a MySQL database fails when using the 'caching_sha2_password' plugin.

DBMS: MySQL (ver. 8.3.0)
Driver: org.mariadb:r2dbc-mariadb:1.3.0

You can use this to reproduce:

`CREATE USER 'myUser'@'%' IDENTIFIED
WITH 'caching_sha2_password'
BY 'MySuperPasswordIsVeryLong';

GRANT ALL PRIVILEGES
ON db.*
TO 'myUser'@'%';

FLUSH PRIVILEGES;`

Simple Java Class trying to connect:

`package com.example;

import org.mariadb.r2dbc.MariadbConnectionConfiguration;
import org.mariadb.r2dbc.MariadbConnectionFactory;
import org.mariadb.r2dbc.SslMode;

public class Main {
public static void main(String[] args) {
MariadbConnectionConfiguration conf = MariadbConnectionConfiguration.builder()
.allowPublicKeyRetrieval(true)
.sslMode(SslMode.DISABLE)
.host("localhost")
.port(3306)
.username("myUser")
.password("MySuperPasswordIsVeryLong")
.database("db")
.build();
MariadbConnectionFactory factory = new MariadbConnectionFactory(conf);
factory.create().block();
}
}`