Convert X.509 certificate from hex form to .cer format

Question

How to convert X.509 certificate from a hex-dump form to .CER format? Additionally, should be blank space separators removed from hex dump first? Thanks.

Answer 1

You could use ASN.1 editor. It has a data converter that will convert HEX to PEM format of data. the source is also available so if you need to use it in code you can look how it is done.

Or you could use certutil.exe using command

certutil -decodehex c:\cert.hex c:\cert.cer