(Unicode C) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

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#include <C_CkCertW.h>
#include <C_CkPrivateKeyW.h>
#include <C_CkSshKeyW.h>
#include <C_CkSFtpW.h>

void ChilkatSample(void)
    {
    HCkCertW cert;
    BOOL success;
    HCkPrivateKeyW privKey;
    const wchar_t *privKeyPem;
    HCkSshKeyW sshKey;
    HCkSFtpW sftp;

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

    cert = CkCertW_Create();

    // Load the certificate from the Windows certificate store
    success = CkCertW_LoadByCommonName(cert,L"my_cert_common_name");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkCertW_Dispose(cert);
        return;
    }

    // Get the private key.  
    privKey = CkCertW_ExportPrivateKey(cert);
    if (CkCertW_getLastMethodSuccess(cert) == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkCertW_Dispose(cert);
        return;
    }

    privKeyPem = CkPrivateKeyW_getPkcs8Pem(privKey);
    if (CkPrivateKeyW_getLastMethodSuccess(privKey) == FALSE) {
        wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(privKey));
        CkCertW_Dispose(cert);
        return;
    }

    sshKey = CkSshKeyW_Create();
    success = CkSshKeyW_FromOpenSshPrivateKey(sshKey,privKeyPem);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(sshKey));
        CkCertW_Dispose(cert);
        CkSshKeyW_Dispose(sshKey);
        return;
    }

    // Connect to an SSH/SFTP server
    sftp = CkSFtpW_Create();
    success = CkSFtpW_Connect(sftp,L"sftp.example.com",22);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkCertW_Dispose(cert);
        CkSshKeyW_Dispose(sshKey);
        CkSFtpW_Dispose(sftp);
        return;
    }

    // Authenticate with the SSH server using a username + private key.
    // (The private key serves as the password.  The username identifies
    // the SSH user account on the server.)
    success = CkSFtpW_AuthenticatePk(sftp,L"mySshLogin",sshKey);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkCertW_Dispose(cert);
        CkSshKeyW_Dispose(sshKey);
        CkSFtpW_Dispose(sftp);
        return;
    }

    wprintf(L"OK, the connection and authentication with the SSH server is completed.\n");

    // This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...


    CkCertW_Dispose(cert);
    CkSshKeyW_Dispose(sshKey);
    CkSFtpW_Dispose(sftp);

    }