Create S/MIME Detached Signature with PFX

How to use a PFX to create a signed S/MIME message.

Download Chilkat C++ Libraries for VC++ 8.0 / Win32

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#include <CkMime.h>
#include <CkCertStore.h>
#include <CkString.h>
#include <CkCert.h>

void ChilkatSample(void)
    {

    CkMime mime;

    bool success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        printf("Failed to unlock component\n");
        return;
    }

    mime.AddHeaderField("Subject","This is a test");
    mime.AddHeaderField("Abc","123");

    mime.SetBodyFromPlainText("This is the body");

    CkCertStore certStore;

    CkString password;
    password = "myPassword";
    success = certStore.LoadPfxFile("chilkat.pfx",password);
    if (success == false) {
        printf("%s\n",certStore.lastErrorText());
        return;
    }

    CkCert *cert = 0;
    cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc.");
    if (cert == 0 ) {
        printf("Failed to find certificate!\n");
        return;
    }

    //  Display the full distinguished name of the cert.
    printf("%s\n",cert->subjectDN());

    success = mime.AddDetachedSignature(*cert);
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    delete cert;

    printf("%s\n",mime.getMime());


    }