S/MIME Signed Message

Create an S/MIME signed (PKCS7) message.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

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

void ChilkatSample(void)
    {
    CkMime mime;

    bool success;
    success = mime.UnlockComponent("Anything for 30-day trial.");
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        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) {
        printf("%s\n",cert.lastErrorText());
        return;
    }

    //  Convert to a signed message.
    success = mime.ConvertToSigned(cert);
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Display the signed MIME:
    printf("%s\n",mime.getMime());

    printf("----\n");

    //  Unwrap to restore the original MIME.
    success = mime.UnwrapSecurity();
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  Display the restored (unsigned) MIME:
    printf("%s\n",mime.getMime());

    }