C#

Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted email. C#

bool success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.MailMan mailman = new Chilkat.MailMan();

// Set the SMTP server.
mailman.SmtpHost = "smtp.example.com";

// Create a new email object
Chilkat.Email email = new Chilkat.Email();

email.Subject = "This email is encrypted";
email.Body = "This is a digitally encrypted mail";
email.From = "Joe <joe@example.com>";
// Emails are encrypted using the recipient's certificate.
string recipientEmailAddr = "jane@example2.com";
email.AddTo("Jane",recipientEmailAddr);

// Indicate that the email is to be sent encrypted.
email.SendEncrypted = true;

// This example demonstrates finding the email encryption certificate
// on a Windows system where the certificate is stored in the Windows 
// certificate store.

Chilkat.Cert cert = new Chilkat.Cert();
// The recipient's certificate is used to encrypt.
// (Because the recipient is the only one in possession of the private key to decrypt.)
success = cert.LoadByEmailAddress(recipientEmailAddr);
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

// Specify the certificate to be used for encryption.
success = email.SetEncryptCert(cert);

success = mailman.SendEmail(email);
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
}
else {
    Debug.WriteLine("Encrypted Mail Sent!");
}