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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C++

#include <CkImap.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    bool 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.

    CkImap imap;

    imap.put_Ssl(true);
    imap.put_Port(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.
    const char *pfxPassword = 0;

    //  Load the client certificate (and its private key) from a PFX file.
    CkCert cert;
    success = cert.LoadPfxFile("qa_data/client.pfx",pfxPassword);
    if (success == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    //  Provide the client certificate BEFORE connecting.
    success = imap.SetSslClientCert(cert);
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    success = imap.Connect("imap.example.com");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    success = imap.Login("user@example.com","myPassword");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    success = imap.Disconnect();
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }
    }