(MFC) Verify SSL Server Certificate

Demonstrates how to connect to an SSL server and verify its SSL certificate.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSocket.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkSocket socket;

    bool ssl = true;
    int maxWaitMillisec = 20000;

    // The SSL server hostname may be an IP address, a domain name,
    // or "localhost". 
    const char *sslServerHost = 0;
    sslServerHost = "www.paypal.com";
    int sslServerPort = 443;

    // Connect to the SSL server:
    bool success = socket.Connect(sslServerHost,sslServerPort,ssl,maxWaitMillisec);
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkCert *cert = 0;

    bool bExpired;
    bool bRevoked;
    bool bSignatureVerified;
    bool bTrustedRoot;

    cert = socket.GetSslServerCert();
    if (socket.get_LastMethodSuccess() != false) {

        strOut.append("Server Certificate:");
        strOut.append("\r\n");
        strOut.append("Distinguished Name: ");
        strOut.append(cert->subjectDN());
        strOut.append("\r\n");
        strOut.append("Common Name: ");
        strOut.append(cert->subjectCN());
        strOut.append("\r\n");
        strOut.append("Issuer Distinguished Name: ");
        strOut.append(cert->issuerDN());
        strOut.append("\r\n");
        strOut.append("Issuer Common Name: ");
        strOut.append(cert->issuerCN());
        strOut.append("\r\n");

        bExpired = cert->get_Expired();
        bRevoked = cert->get_Revoked();
        bSignatureVerified = cert->get_SignatureVerified();
        bTrustedRoot = cert->get_TrustedRoot();

        strOut.append("Expired: ");
        strOut.appendInt(bExpired);
        strOut.append("\r\n");
        strOut.append("Revoked: ");
        strOut.appendInt(bRevoked);
        strOut.append("\r\n");
        strOut.append("Signature Verified: ");
        strOut.appendInt(bSignatureVerified);
        strOut.append("\r\n");
        strOut.append("Trusted Root: ");
        strOut.appendInt(bTrustedRoot);
        strOut.append("\r\n");

        delete cert;
    }

    // Close the connection with the server
    // Wait a max of 20 seconds (20000 millsec)
    success = socket.Close(20000);


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }