(Unicode C++) AddDetachedSignaturePk

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

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#include <CkMimeW.h>
#include <CkCertW.h>
#include <CkPrivateKeyW.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkMimeW mime;

    // Load the certificate from a .cer file.
    CkCertW cert;
    bool success = cert.LoadFromFile(L"aaworkarea/myCert.cer");
    if (success == false) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    // Load the private key from an encrypted PEM file.
    // (A private key can be loaded from other file formats also..)
    CkPrivateKeyW privKey;
    success = privKey.LoadEncryptedPemFile(L"aaworkarea/myPrivateKey.pem",L"myPassword");
    if (success == false) {
        wprintf(L"%s\n",privKey.lastErrorText());
        return;
    }

    success = mime.SetBodyFromPlainText(L"This is the plain-text MIME body.");

    // Sign the MIME (adds a PKCS7 detached signature)
    success = mime.AddDetachedSignaturePk(cert,privKey);
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    // Save the S/MIME to a file.
    success = mime.SaveMime(L"aaworkarea/signedMime.txt");
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    wprintf(L"success!\n");
    }