(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 <C_CkMailManW.h>
#include <C_CkCertW.h>
#include <C_CkEmailW.h>

void ChilkatSample(void)
    {
    HCkMailManW mailman;
    HCkCertW cert1;
    BOOL success;
    HCkCertW cert2;
    HCkCertW cert3;
    HCkEmailW email;

    // 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.
    mailman = CkMailManW_Create();

    // Set the SMTP server.
    CkMailManW_putSmtpHost(mailman,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.
    cert1 = CkCertW_Create();
    success = CkCertW_LoadFromFile(cert1,L"recipient1.cer");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert1));
        CkMailManW_Dispose(mailman);
        CkCertW_Dispose(cert1);
        return;
    }

    cert2 = CkCertW_Create();
    success = CkCertW_LoadFromFile(cert2,L"recipient2.cer");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert2));
        CkMailManW_Dispose(mailman);
        CkCertW_Dispose(cert1);
        CkCertW_Dispose(cert2);
        return;
    }

    cert3 = CkCertW_Create();
    success = CkCertW_LoadFromFile(cert3,L"recipient3.cer");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert3));
        CkMailManW_Dispose(mailman);
        CkCertW_Dispose(cert1);
        CkCertW_Dispose(cert2);
        CkCertW_Dispose(cert3);
        return;
    }

    // Create a new email object
    email = CkEmailW_Create();

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

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

    if (success == TRUE) {
        success = CkEmailW_AddEncryptCert(email,cert3);
    }

    if (success != TRUE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkMailManW_Dispose(mailman);
        CkCertW_Dispose(cert1);
        CkCertW_Dispose(cert2);
        CkCertW_Dispose(cert3);
        CkEmailW_Dispose(email);
        return;
    }

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

    // Indicate that the email is to be sent encrypted.
    CkEmailW_putSendEncrypted(email,TRUE);

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



    CkMailManW_Dispose(mailman);
    CkCertW_Dispose(cert1);
    CkCertW_Dispose(cert2);
    CkCertW_Dispose(cert3);
    CkEmailW_Dispose(email);

    }