Cannot Connect to AWS Database using TLS with Server CA Validation

Question

AWS documentation states that to connect to my DocumentDB Cluster, I need to use a query string that ends like so ?ssl_ca_certs=rds-combined-ca-bundle.pem&replicaS

Answer 1

Try adding the RDS CA file into your C# trust store.

            X509Store store = new X509Store(StoreName.Root);
            X509Certificate2 ca = new X509Certificate2();
            try {
                store.Open(OpenFlags.ReadWrite);
                store.Add(ca);
            } catch (Exception ex) {
                Console.WriteLine("Root certificate import failed: " + ex.Message);
                throw;
            } finally {
                store.Close();
            }