C

Send Signed Email using PFX File

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file. C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkMailMan mailman;
    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.mymailserver.com");

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

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

    //  Indicate that the email should be sent signed.
    CkEmail_putSendSigned(email,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 = CkMailMan_AddPfxSourceFile(mailman,"/pfx_files/chilkatsoft_secret.pfx","secret");
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        return;
    }

    //  Signed email can be sent in two different ways.  
    //  In a multipart/signed email, the signature is attached as a separate MIME part.
    //  In an opaque email (signedData) the content of the email is encapsulated within the signature
    //  and the email is sent as "application/pkcs7-mime". 
    //  Either should be fine, but some receiving systems might require one or the other..
    CkMailMan_putOpaqueSigning(mailman,FALSE);

    //  Send a signed email.
    success = CkMailMan_SendEmail(mailman,email);
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
    }
    else {
        //  The LastErrorText property provides information
        //  even when successful.
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        printf("Mail Sent!\n");
    }



    CkMailMan_Dispose(mailman);
    CkEmail_Dispose(email);

    }