(C) Get Issuer Certificate Information

See more Certificates Examples

A certificate contains information about its issuer. This example demonstrates how to get the issuer information from a certificate.

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#include <C_CkCert.h>

void ChilkatSample(void)
    {
    HCkCert cert;
    BOOL success;

    cert = CkCert_Create();

    success = CkCert_LoadFromFile(cert,"qa_data/certs/sample.cer");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkCert_Dispose(cert);
        return;
    }

    // Get issuer information:

    // -----------------------------------------------------------------------
    // (Not all subject fields may exist depending on the issuer certificate.)
    // -----------------------------------------------------------------------

    // Issuer DN (Distinguished Name, i.e. all the Issuer subject parts)
    printf("DN: %s\n",CkCert_issuerDN(cert));

    // Common Subject parts:
    // Issuer Common Name
    printf("CN: %s\n",CkCert_issuerCN(cert));

    // Issuer Country
    printf("C: %s\n",CkCert_issuerC(cert));

    // Issuer Email address
    printf("E: %s\n",CkCert_issuerE(cert));

    // Issuer Locality
    printf("L: %s\n",CkCert_issuerL(cert));

    // Issuer Organization
    printf("O: %s\n",CkCert_issuerO(cert));

    // Issuer Organizational Unit
    printf("OU: %s\n",CkCert_issuerOU(cert));

    // Issuer State
    printf("S: %s\n",CkCert_issuerS(cert));


    CkCert_Dispose(cert);

    }