The detail between the 'BEGIN CERTIFICATE' and 'END CERTIFICATE' is the Base64-encoded certificate. If you have a PEM format file and need a DER (binary) version of it, you just need to Base64 decode the file. This can be done with a variety of Base64 utilities, however, a very quick method is to use the functionality built into the Microsoft Internet Explorer.
1. Make sure that a file contains only the entries for the one certificate (it can
include the BEGIN and END lines).
2. Give the file a suffix of DER.
3. Double-click the file. The certificate displays in a standard
Microsoft certificate display window.
4. Click the Details tab.
5. Click the 'Copy to File' button.
6. Click NEXT.
7. Select the default option of 'DER encoded binary X.509 (.CER).
8. Enter a name to save the file, and click NEXT.
9. Click FINISH.
If you have the DER format file, and you want to get hold of the PEM version for SSL-C, then a similar process can be used. Just select Base64 encoded X.509 (.CER) as the file type in step 7. The utility will also put the BEGIN and END comment lines into the file.
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