Convert Certificate from PEM to DER

Convert a PEM formatted certificate file (.cer, .crt, .pem) to DER format (.cer, .der). The Chilkat certificate class/object is a freeware component that is included in many of the Chilkat downloads.

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#include <C_CkCert.h>

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

    cert = CkCert_Create();

    //  LoadFromFile will load either PEM and DER formatted files.
    //  It automatically recognizes the file format based on the
    //  file contents.
    success = CkCert_LoadFromFile(cert,"chilkat.crt");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        return;
    }

    printf("%s\n",CkCert_subjectDN(cert));

    success = CkCert_ExportCertDerFile(cert,"chilkat.der");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        return;
    }

    printf("success!\n");

    CkCert_Dispose(cert);

    }