Unicode C

Use Installed Cert on Windows for TLS Client Authentication

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Demonstrates how to use a certificate that has already been installed on a Windows PC for TLS client authentication. Unicode C

#include <C_CkHttpW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    HCkCertW cert;

    success = FALSE;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttpW_Create();

    // On Windows, a pre-installed certificate can be loaded in a number of different ways.
    // This example loads by the common name:
    cert = CkCertW_Create();
    success = CkCertW_LoadByCommonName(cert,L"My ECA Medium Assurance Identity Certificate");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkHttpW_Dispose(http);
        CkCertW_Dispose(cert);
        return;
    }

    // Make sure this certificate has a private key available.  
    // It should be a private key such that when the certificate was installed, it was marked as "exportable"
    // so that authorized programs are able to access the private key.
    if (CkCertW_HasPrivateKey(cert) != TRUE) {
        wprintf(L"A private key is needed for TLS client authentication.\n");
        wprintf(L"This certificate has no private key.\n");
        CkHttpW_Dispose(http);
        CkCertW_Dispose(cert);
        return;
    }

    // Set the certificate to be used for mutual TLS authentication
    // (i.e. sets the client-side certificate for two-way TLS authentication)
    success = CkHttpW_SetSslClientCert(http,cert);
    if (success != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkCertW_Dispose(cert);
        return;
    }

    // At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
    // connection will automatically use it if the server demands a client-side cert.


    CkHttpW_Dispose(http);
    CkCertW_Dispose(cert);

    }