GENERAL INFORMATION =================== The X.509 (PKIX1) certificate decoder. Invoking `make` will compile the ASN.1 specifications from the rfc3280.txt in the above directory. x509dump USAGE ============== To use the x509dump, you'll have to prepare an X.509 certificate in DER encoding. The typical X.509 certificate will have a PEM format (DER encoded data wrapped in base64, wrapped in PEM "BEGIN" and "END" sections). The openssl x509 utility may be used to convert between PEM and DER. EXAMPLE: Convert 'certificate.pem' into 'certificate.der': openssl x509 -inform PEM -in certificate.pem \ -outform DER -out certificate.der After convertsion, the x509dump utility may be used to dump the contents of the DER-encoded X.509 certificate: ./x509dump certificate.der # Print as XML (BASIC-XER) The full list of recognized command line options may be obtained with > ./x509dump -h