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MimeKit

SmtpClientSslKeyExchangeStrength Property

Get the negotiated SSL or TLS key exchange algorithm strength.

Namespace:  MailKit.Net.Smtp
Assembly:  MailKit (in MailKit.dll) Version: 2.14.0
Syntax
C#
public override int? SslKeyExchangeStrength { get; }

Property Value

Type: NullableInt32
The negotiated SSL or TLS key exchange algorithm strength.

Implements

IMailServiceSslKeyExchangeStrength
IMailServiceSslKeyExchangeStrength
Remarks
Gets the negotiated SSL or TLS key exchange algorithm strength once an SSL or TLS connection has been made.
Examples
C#
public static void PrintSslConnectionInfo (string host, int port)
{
    using (var client = new SmtpClient ()) {
        client.Connect (host, port, SecureSocketOptions.Auto);

        Console.WriteLine ($"Negotiated the following SSL options with {host}:");
        Console.WriteLine ($"        Protocol Version: {client.SslProtocol}");
        Console.WriteLine ($"        Cipher Algorithm: {client.SslCipherAlgorithm}");
        Console.WriteLine ($"         Cipher Strength: {client.SslCipherStrength}");
        Console.WriteLine ($"          Hash Algorithm: {client.SslHashAlgorithm}");
        Console.WriteLine ($"           Hash Strength: {client.SslHashStrength}");
        Console.WriteLine ($"  Key-Exchange Algorithm: {client.SslKeyExchangeAlgorithm}");
        Console.WriteLine ($"   Key-Exchange Strength: {client.SslKeyExchangeStrength}");

        // Example Log:
        // 
        // Negotiated the following SSL options with smtp.gmail.com:
        //         Protocol Version: Tls12
        //         Cipher Algorithm: Aes128
        //          Cipher Strength: 128
        //           Hash Algorithm: Sha256
        //            Hash Strength: 0
        //   Key-Exchange Algorithm: 44550
        //    Key-Exchange Strength: 255

        client.Disconnect (true);
    }
}
See Also