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.

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Chilkat.Cert cert = new Chilkat.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) {
    MessageBox.Show(cert.LastErrorText);
    return;
}

MessageBox.Show(cert.SubjectDN);

success = cert.ExportCertDerFile("chilkat.der");
if (success != true) {
    MessageBox.Show(cert.LastErrorText);
    return;
}

MessageBox.Show("success!");