(.NET Core C#) Send Signed and Encrypted EDI Email (EDIFACT)

Demonstrates how to send a signed and encrypted EDI email (EDIFACT email).

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

//  The mailman object is used for sending and receiving email.
Chilkat.MailMan mailman = new Chilkat.MailMan();

//  Create a new email object
Chilkat.Email email = null;

//  Build the basic EDI email where the body is the EDIFACT message:
string ediMsg = "UNB+IATB:1+6XPPC ...";
string name = "something";
string filename = "something";
string charset = "iso-8859-1";
email.SetEdifactBody(ediMsg,name,filename,charset);

email.Subject = "This is the subject";
email.From = "Chilkat Admin <admin@chilkatsoft.com>";
bool success = email.AddTo("Chilkat Support","support@chilkatsoft.com");

//  Indicate that the email should be sent signed.
email.SendSigned = true;

//  Tell the mailman to use a PFX file as a source for locating
//  the certificate and private key required for signing.
//  The certificate chosen for signing will be the one that
//  matches the sender's email address, which also has
//  a private key.  All intermediate certs in the chain of
//  authentication, up to and including the root, will
//  be included in the signature.
success = mailman.AddPfxSourceFile("/pfx_files/myCertAndPrivateKey.pfx","secret");
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

//  Load the .cer file into a certificate object.
//  When sending S/MIME encrypted email, it is the recipient's
//  certificate that is used for encryption.  Only the public key
//  is needed to encrypt.  The recipient is the only
//  one possessing the private key, and therefore is the only
//  one able to decrypt.
Chilkat.Cert cert = null;
success = cert.LoadFromFile("/certs/recipientCert.cer");
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

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

//  Indicate that we want 192-bit 3DES encryption:
email.Pkcs7CryptAlg = "3des";
email.Pkcs7KeyLength = 192;

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

//  Tell the mailman to use an opaque signature (as opposed to a detached signature)
mailman.OpaqueSigning = true;

//  SMTP server (use your settings and refer to the online
//  reference  documentation for more options)
mailman.SmtpHost = "smtp.mymailserver.com";
mailman.SmtpUsername = "myLogin";
mailman.SmtpPassword = "myPassword";
mailman.SmtpPort = 587;
mailman.StartTLS = true;

//  Send the signed/encrypted EDI email
success = mailman.SendEmail(email);
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
}
else {
    Debug.WriteLine("Mail Sent!");
}