
GENERAL INFORMATION
===================

The X.509 (PKIX1) certificate decoder. Invoking `make` will compile the ASN.1
specifications from the rfc3280.txt in the above directory.

The ../../skeletons/asn-decoder-template.c will supply the missing
"int main()" routine which drives the decoding process.

x509dump USAGE
==============

To use the code, you'll have to prepare an X.509 certificate in DER encoding.
The typical X.509 certificate will have a PEM form (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 -x certificate.der	# Print as XML (BASIC-XER)

The full list of recognized command line options may be obtained with

	> ./x509dump -h
	Usage: ./x509dump [options] <data.ber> ...
	Where options are:
	  -b <size>    Set the i/o buffer size (default is 8192)
	  -c           Check ASN.1 constraints after decoding
	  -d           Enable debugging (-dd is even better)
	  -n <num>     Process files <num> times
	  -s <size>    Set the stack usage limit
	  -p           Print out the decoded contents
	  -x           Print out as XML

