Unicode C

Set a TLS Client Certificate for IMAP

Demonstrates the Chilkat Imap.SetSslClientCert method, which supplies a client certificate for TLS client-certificate authentication. The only argument is a Cert object that must provide access to its private key. Call it before connecting. This example loads the certificate from a PFX file.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: Most IMAP servers authenticate with a username and password only. A few high-security deployments additionally require mutual TLS, where the client presents its own certificate during the handshake. Because that happens as part of connecting, the certificate must be set before Connect — setting it afterward has no effect on the already-established connection.

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#include <C_CkImapW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkImapW imap;
    const wchar_t *pfxPassword;
    HCkCertW cert;

    success = FALSE;

    //  Demonstrates the Imap.SetSslClientCert method, which supplies a client certificate for TLS
    //  client-certificate authentication.  The only argument is a Cert object.  It must be called
    //  before connecting.

    imap = CkImapW_Create();

    CkImapW_putSsl(imap,TRUE);
    CkImapW_putPort(imap,993);

    //  The PFX password is not hard-coded in source.  Insert code here to obtain it from an
    //  interactive prompt, environment variable, or a secrets vault.

    //  Load the client certificate (and its private key) from a PFX file.
    cert = CkCertW_Create();
    success = CkCertW_LoadPfxFile(cert,L"qa_data/client.pfx",pfxPassword);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkImapW_Dispose(imap);
        CkCertW_Dispose(cert);
        return;
    }

    //  Provide the client certificate BEFORE connecting.
    success = CkImapW_SetSslClientCert(imap,cert);
    if (success == FALSE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkImapW_Connect(imap,L"imap.example.com");
    if (success == FALSE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkImapW_Login(imap,L"user@example.com",L"myPassword");
    if (success == FALSE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkImapW_Disconnect(imap);
    if (success == FALSE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        CkCertW_Dispose(cert);
        return;
    }



    CkImapW_Dispose(imap);
    CkCertW_Dispose(cert);

    }