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# Authors:
# Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2010 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import sys
import base64
import nss.nss as nss
from ipapython import ipautil
from ipalib import api
PEM = 0
DER = 1
def strip_header(pem):
"""
Remove the header and footer from a certificate.
"""
s = pem.find("-----BEGIN CERTIFICATE-----")
if s >= 0:
e = pem.find("-----END CERTIFICATE-----")
pem = pem[s+27:e]
return pem
def load_certificate(data, datatype=PEM, dbdir=None):
"""
Given a base64-encoded certificate, with or without the
header/footer, return a request object.
Returns a nss.Certificate type
"""
if type(data) in (tuple, list):
data = data[0]
if (datatype == PEM):
data = strip_header(data)
data = base64.b64decode(data)
if dbdir is None:
if api.env.in_tree:
dbdir = api.env.dot_ipa + os.sep + 'alias'
else:
dbdir = "/etc/httpd/alias"
nss.nss_init(dbdir)
return nss.Certificate(buffer(data))
def get_subject(certificate, datatype=PEM):
"""
Load an X509.3 certificate and get the subject.
"""
cert = load_certificate(certificate, datatype)
return cert.subject
def get_serial_number(certificate, datatype=PEM):
"""
Return the decimal value of the serial number.
"""
cert = load_certificate(certificate, datatype)
return cert.serial_number
if __name__ == '__main__':
nss.nss_init_nodb()
# Read PEM certs from stdin and print out its components
certlines = sys.stdin.readlines()
cert = ''.join(certlines)
cert = load_certificate(cert)
print cert
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