Convert Certificate from PEM to DER

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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.

#include <CkCert.h>

void ChilkatSample(void)
    {
    CkCert cert;

    bool success;

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

    printf("%s\n",cert.subjectDN());

    success = cert.ExportCertDerFile("chilkat.der");
    if (success != true) {
        printf("%s\n",cert.lastErrorText());
        return;
    }

    printf("success!\n");

    }