Connection Java-MySql : Public Key Retrieval is not allowed

Question

I am trying to connect MySql database with Java using connector 8.0.11. Everything seems to be ok but I am getting this below exception:

Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed

Stack Trace:

Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:108) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) at  

com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862) at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:444) at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226) at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:438) at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:146) at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:119) at ConnectionManager.getConnection(ConnectionManager.java:28) at Main.main(Main.java:8) 

Connector Manager:

 public class ConnectionManager {

    public static final String serverTimeZone = "UTC";
    public static final String serverName = "localhost";
    public static final String databaseName ="biblioteka";
    public static final int portNumber = 3306;
    public static final String user = "anyroot";
    public static final String password = "anyroot";

    public static Connection getConnection() throws SQLException {

        MysqlDataSource dataSource = new MysqlDataSource();

        dataSource.setUseSSL( false );
        dataSource.setServerTimezone( serverTimeZone );
        dataSource.setServerName( serverName );
        dataSource.setDatabaseName( databaseName );
        dataSource.setPortNumber( portNumber );
        dataSource.setUser( user );
        dataSource.setPassword( password );

        return dataSource.getConnection();
    }
}

Answer 1

You must add the client option to the mysql-connector allowPublicKeyRetrieval=true this will allow the client to automatically request the public key from the server. 

Also, note that AllowPublicKeyRetrieval=True could allow a malicious proxy to perform a Man-in-the-middle attack to get the plaintext password, so it is by default False and it must be explicitly enabled.

Check-out here.

You can also try adding useSSL=false when you are using it for testing/develop purposes.

Example:

jdbc:mysql://localhost:3306/db?allowPublicKeyRetrieval=true&useSSL=false

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