C

Verify SSL Server Certificate

See more Socket/SSL/TLS Examples

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

#include <C_CkSocket.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSocket socket;
    BOOL ssl;
    int maxWaitMillisec;
    const char *sslServerHost;
    int sslServerPort;
    HCkCert cert;
    BOOL bExpired;
    BOOL bRevoked;
    BOOL bSignatureVerified;
    BOOL bTrustedRoot;

    success = FALSE;

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

    socket = CkSocket_Create();

    ssl = TRUE;
    maxWaitMillisec = 20000;

    // The SSL server hostname may be an IP address, a domain name,
    // or "localhost". 

    sslServerHost = "www.paypal.com";
    sslServerPort = 443;

    // Connect to the SSL server:
    success = CkSocket_Connect(socket,sslServerHost,sslServerPort,ssl,maxWaitMillisec);
    if (success == FALSE) {
        printf("%s\n",CkSocket_lastErrorText(socket));
        CkSocket_Dispose(socket);
        return;
    }

    cert = CkCert_Create();

    success = CkSocket_GetServerCert(socket,cert);
    if (success != FALSE) {

        printf("Server Certificate:\n");
        printf("Distinguished Name: %s\n",CkCert_subjectDN(cert));
        printf("Common Name: %s\n",CkCert_subjectCN(cert));
        printf("Issuer Distinguished Name: %s\n",CkCert_issuerDN(cert));
        printf("Issuer Common Name: %s\n",CkCert_issuerCN(cert));

        bExpired = CkCert_getExpired(cert);
        bRevoked = CkCert_getRevoked(cert);
        bSignatureVerified = CkCert_getSignatureVerified(cert);
        bTrustedRoot = CkCert_getTrustedRoot(cert);

        printf("Expired: %d\n",bExpired);
        printf("Revoked: %d\n",bRevoked);
        printf("Signature Verified: %d\n",bSignatureVerified);
        printf("Trusted Root: %d\n",bTrustedRoot);

    }

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


    CkSocket_Dispose(socket);
    CkCert_Dispose(cert);

    }