asn1c/examples/sample.source.PKIX1/README

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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