(C) X509Certificate GetCertHash SHA256

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Shows how to get the SHA256 hash of a certificate.

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#include <C_CkCert.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    HCkCert cert;
    BOOL success;
    HCkBinData bdDer;
    const char *certHash;

    cert = CkCert_Create();

    // Load a certificate object with a certificate.
    // The certificate object could have come from any source,
    // or perhaps was obtained from another Chilkat function.
    // The source does not matter.  What matters is that we have
    // a cert object loaded with the certificate..
    success = CkCert_LoadFromFile(cert,"qa_data/certs/cert_test123.cer");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkCert_Dispose(cert);
        return;
    }

    // Get the binary DER of the certificae, and compute the SHA256 hash:
    bdDer = CkBinData_Create();
    CkCert_ExportCertDerBd(cert,bdDer);

    // Get the base64 representation of the SHA256 hash.
    certHash = CkBinData_getHash(bdDer,"sha256","base64");

    printf("Certificate hash in base64 = %s\n",certHash);


    CkCert_Dispose(cert);
    CkBinData_Dispose(bdDer);

    }