x509: use python-cryptography to process certs

Update x509.load_certificate and related functions to return
python-cryptography ``Certificate`` objects.  Update the call sites
accordingly, including removal of NSS initialisation code.

Also update GeneralName parsing code to return python-cryptography
GeneralName values, for consistency with other code that processes
GeneralNames.  The new function, `get_san_general_names`, and
associated helper functions, can be removed when python-cryptography
provides a way to deal with unrecognised critical extensions.

Part of: https://fedorahosted.org/freeipa/ticket/6398

Reviewed-By: Jan Cholasta <jcholast@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

0 files changed, 0 insertions, 0 deletions