DER encoded certificate

DER encoded certificate is a file format for storing an X.509 certificate.

It is one type of DER file. DER is a subset of BER format. BER is a serialization format for the abstract ASN.1 format.

See also PEM encoded certificate.

Examples
To display the contents of a DER encoded certificate using OpenSSL: openssl x509 -noout -text -inform der -in example.der

To convert from DER encoded certificate format to PEM encoded certificate format: openssl x509 -in example.der -inform der -outform pem -out example.pem

Software

 * OpenSSL

Sample files

 * CyberSource certificate
 * https://telparia.com/fileFormatSamples/other/derCertificate/

Links

 * Info on certificate files at CyberSource site
 * Wikipedia: DER encoding