Hello!

I would like to ask if there's a plan to support sslMode configuration for MySQL database? According to FAQ, currently, only PostgreSQL is supported. I also noticed that com.github.jasync.sql.db.SSLConfiguration defaults to sslMode=disabled mode for MySQL which leads to problems when the MySQL Server is configured to enforce SSL connections.

I had a look at the implementation details and found that this library integrates with R2DBC SPI (https://r2dbc.io/spec/0.8.1.RELEASE/spec/html/#overview.connection.discovery). The driver will be discovered by R2DBC SPI which will use com.github.jasync.r2dbc.mysql.MysqlConnectionFactoryProvider#create to create io.r2dbc.spi.ConnectionFactory object:

// from: com.github.jasync.r2dbc.mysql.MysqlConnectionFactoryProvider#create
@Suppress("NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS")
override fun create(connectionFactoryOptions: ConnectionFactoryOptions): JasyncConnectionFactory {
    val configuration = Configuration(
        host = connectionFactoryOptions.getValue(HOST),
        port = connectionFactoryOptions.getValue(PORT),
        username = connectionFactoryOptions.getValue(USER),
        password = connectionFactoryOptions.getValue(PASSWORD)?.toString(),
        database = connectionFactoryOptions.getValue(DATABASE),
        applicationName = connectionFactoryOptions.getValue(APPLICATION_NAME),
        connectionTimeout = connectionFactoryOptions.getValue(CONNECT_TIMEOUT)?.toMillis()?.toInt() ?: 5000,
        queryTimeout = connectionFactoryOptions.getValue(QUERY_TIMEOUT)
    )
    return JasyncConnectionFactory(MySQLConnectionFactory(configuration))
}

The above method does not configure com.github.jasync.sql.db.SSLConfiguration and thus, the default sslMode (Mode.Disable) will be used. Even though, the connectionFactoryOptions could have the option ssl set to true or any sslMode parameter specified.

I suspect that changing this factory to interpret the ssl and sslMode parameter of connectionFactoryOptions would quickly resolve the issue. It seems that com.github.jasync.sql.db.mysql.MySQLConnection#onHandshake already supports SSL.

I would be happy to contribute and resolve this issue. But first I would like to make sure:

• Is my understanding of current implementation described above correct?
• The ssl option in connectionFactoryOptions would return true in case the secure protocol (r2dbcs) is used. However how should it handle the combination of secure protocol and sslMode=disabled, for example through the following connection string: r2dbcs:mysql://example.com?sslMode=disabled?
• Should my contribution also support other MySQL parameters. If so, would anyone be able to specify which? I know there are legacy parameters like 'useSSL', 'requireSSL', and 'verifyServerCertificate' which are still accepted but translated into a value for 'sslMode' by MySQL Server. The com.github.jasync.sql.db.SSLConfiguration also accepts sslrootcert, sslcert, sslkey.

Thanks!