(Unicode C++) Send Encrypted Email to Multiple Recipients

Demonstrates how to create and send an S/MIME encrypted email to multiple recipients. The digital certificate of each recipient is required. The encrypting/sending process uses each recipient's digital certificate (which internally contains the public key). Each recipient decrypts the received email using his/her private key.

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#include <CkMailManW.h>
#include <CkCertW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    // 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.
    CkMailManW mailman;

    // Set the SMTP server.
    mailman.put_SmtpHost(L"smtp.mymailserver.com");

    // Load each recipient's certificate into a Chilkat certificate object.
    // This example loads the certificates from files.  However, the Chilkat
    // certificate object provides other means for loading certificates,
    // such as from in-memory PEM strings, or in-memory binary DER encoded form, etc.
    CkCertW cert1;
    bool success = cert1.LoadFromFile(L"recipient1.cer");
    if (success != true) {
        wprintf(L"%s\n",cert1.lastErrorText());
        return;
    }

    CkCertW cert2;
    success = cert2.LoadFromFile(L"recipient2.cer");
    if (success != true) {
        wprintf(L"%s\n",cert2.lastErrorText());
        return;
    }

    CkCertW cert3;
    success = cert3.LoadFromFile(L"recipient3.cer");
    if (success != true) {
        wprintf(L"%s\n",cert3.lastErrorText());
        return;
    }

    // Create a new email object
    CkEmailW email;

    email.put_Subject(L"This email is encrypted and sent to 3 recipients");
    email.put_Body(L"This is an S/MIME encrypted mail sent to 3 recipients");
    email.put_From(L"Chilkat Support <support@chilkatsoft.com>");

    // Make each of the certificates available for encrypting the email
    // by calling AddEncryptCert for each.
    success = email.AddEncryptCert(cert1);
    if (success == true) {
        success = email.AddEncryptCert(cert2);
    }

    if (success == true) {
        success = email.AddEncryptCert(cert3);
    }

    if (success != true) {
        wprintf(L"%s\n",email.lastErrorText());
        return;
    }

    // Add 3 recipients to the email (2 TO addresses, and 1 CC address)
    success = email.AddTo(L"Recipient 1",L"admin@cknotes.com");
    success = email.AddTo(L"Recipient 2",L"somebody001122@yahoo.com");
    success = email.AddCC(L"Recipient 3",L"somebody123xyz@gmail.com");

    // Indicate that the email is to be sent encrypted.
    email.put_SendEncrypted(true);

    // Send the encrypted email...
    success = mailman.SendEmail(email);
    if (success != true) {
        wprintf(L"%s\n",mailman.lastErrorText());
    }
    else {
        wprintf(L"Encrypted Email Sent!\n");
    }
    }