S/MIME Signed Message

Create an S/MIME signed (PKCS7) message.

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// Needs #include <CkMime.h>
// Needs #include <CkCert.h>

    CkString strOut;

    CkMime mime;

    bool success;
    success = mime.UnlockComponent("Anything for 30-day trial.");
    if (success == false) {
        strOut.append(mime.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

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

    CkCert cert;
    //  Load a certificate that has already been installed (from a .pfx)
    //  on the computer:
    success = cert.LoadByEmailAddress("thawte@chilkatsoft.com");
    if (success == false) {
        strOut.append(cert.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Convert to a signed message.
    success = mime.ConvertToSigned(cert);
    if (success == false) {
        strOut.append(mime.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Display the signed MIME:
    strOut.append(mime.GetMime());
    strOut.append("\r\n");

    strOut.append("----");
    strOut.append("\r\n");

    //  Unwrap to restore the original MIME.
    success = mime.UnwrapSecurity();
    if (success == false) {
        strOut.append(mime.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Display the restored (unsigned) MIME:
    strOut.append(mime.GetMime());
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());