Connecting to your DB cluster using IAM authentication and the Amazon SDK for .NET

You can connect to an Aurora MySQL or Aurora PostgreSQL DB cluster with the Amazon SDK for .NET as described following.

Prerequisites

The following are prerequisites for connecting to your DB cluster using IAM authentication:

Examples

The following code examples show how to generate an authentication token, and then use it to connect to a DB cluster.

To run this code example, you need the Amazon SDK for .NET, found on the Amazon site. The AWSSDK.CORE and the AWSSDK.RDS packages are required. To connect to a DB cluster, use the .NET database connector for the DB engine, such as MySqlConnector for MariaDB or MySQL, or Npgsql for PostgreSQL.

This code connects to an Aurora MySQL DB cluster. Modify the values of the following variables as needed:

using System;
using System.Data;
using MySql.Data;
using MySql.Data.MySqlClient;
using Amazon;

namespace ubuntu
{
  class Program
  {
    static void Main(string[] args)
    {
      var pwd = Amazon.RDS.Util.RDSAuthTokenGenerator.GenerateAuthToken(RegionEndpoint.USEast1, "mysqlcluster.cluster-123456789012.us-east-1.rds.amazonaws.com", 3306, "jane_doe");
      // for debug only Console.Write("{0}\n", pwd);  //this verifies the token is generated

      MySqlConnection conn = new MySqlConnection($"server=mysqlcluster.cluster-123456789012.us-east-1.rds.amazonaws.com;user=jane_doe;database=mydB;port=3306;password={pwd};SslMode=Required;SslCa=full_path_to_ssl_certificate");
      conn.Open();

      // Define a query
      MySqlCommand sampleCommand = new MySqlCommand("SHOW DATABASES;", conn);

      // Execute a query
      MySqlDataReader mysqlDataRdr = sampleCommand.ExecuteReader();

      // Read all rows and output the first column in each row
      while (mysqlDataRdr.Read())
        Console.WriteLine(mysqlDataRdr[0]);

      mysqlDataRdr.Close();
      // Close connection
      conn.Close();
    }
  }
}

This code connects to an Aurora PostgreSQL DB cluster.

Modify the values of the following variables as needed:

using System;
using Npgsql;
using Amazon.RDS.Util;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var pwd = RDSAuthTokenGenerator.GenerateAuthToken("postgresmycluster.cluster-123456789012.us-east-1.rds.amazonaws.com", 5432, "jane_doe");
// for debug only Console.Write("{0}\n", pwd);  //this verifies the token is generated

            NpgsqlConnection conn = new NpgsqlConnection($"Server=postgresmycluster.cluster-123456789012.us-east-1.rds.amazonaws.com;User Id=jane_doe;Password={pwd};Database=mydb;SSL Mode=Require;Root Certificate=full_path_to_ssl_certificate");
            conn.Open();

            // Define a query
                   NpgsqlCommand cmd = new NpgsqlCommand("select count(*) FROM pg_user", conn);

            // Execute a query
            NpgsqlDataReader dr = cmd.ExecuteReader();

            // Read all rows and output the first column in each row
            while (dr.Read())
                Console.Write("{0}\n", dr[0]);

            // Close connection
            conn.Close();
        }
    }
}

If you want to connect to a DB cluster through a proxy, see Connecting to a proxy using IAM authentication.