C

Sending S/MIME Encrypted Email

Sends an encrypted email using the recipient's digital certificate from a .cer file. C

#include <C_CkMailMan.h>
#include <C_CkCert.h>
#include <C_CkEmail.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMailMan mailman;
    HCkCert cert;
    HCkEmail email;

    success = FALSE;

    //  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 = CkMailMan_Create();

    //  Set the SMTP server.
    CkMailMan_putSmtpHost(mailman,"smtp.comcast.net");

    //  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.
    cert = CkCert_Create();
    success = CkCert_LoadFromFile(cert,"cknotes.cer");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkMailMan_Dispose(mailman);
        CkCert_Dispose(cert);
        return;
    }

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

    CkEmail_putSubject(email,"This email is encrypted");
    CkEmail_putBody(email,"This is a digitally encrypted mail");
    CkEmail_putFrom(email,"Chilkat Support <support@chilkatsoft.com>");
    success = CkEmail_AddTo(email,"Chilkat Blog","admin@cknotes.com");

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

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

    success = CkMailMan_SendEmail(mailman,email);
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
    }
    else {
        printf("Mail Sent!\n");
    }



    CkMailMan_Dispose(mailman);
    CkCert_Dispose(cert);
    CkEmail_Dispose(email);

    }