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# 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 2 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Copyright (c) 2007 Red Hat, inc
#- Written by Seth Vidal skvidal @ fedoraproject.org
from OpenSSL import crypto
import socket
import os
import utils
def_country = 'UN'
def_state = 'FC'
def_local = 'Certmaster-town'
def_org = 'certmaster'
def_ou = 'slave-key'
def make_keypair(dest=None):
pkey = crypto.PKey()
pkey.generate_key(crypto.TYPE_RSA, 2048)
if dest:
destfd = os.open(dest, os.O_RDWR|os.O_CREAT, 0600)
os.write(destfd, (crypto.dump_privatekey(crypto.FILETYPE_PEM, pkey)))
os.close(destfd)
return pkey
def make_csr(pkey, dest=None, cn=None):
req = crypto.X509Req()
req.get_subject()
subj = req.get_subject()
subj.C = def_country
subj.ST = def_state
subj.L = def_local
subj.O = def_org
subj.OU = def_ou
if cn:
subj.CN = cn
else:
subj.CN = utils.get_hostname()
subj.emailAddress = 'root@%s' % subj.CN
req.set_pubkey(pkey)
req.sign(pkey, 'md5')
if dest:
destfd = os.open(dest, os.O_RDWR|os.O_CREAT, 0644)
os.write(destfd, crypto.dump_certificate_request(crypto.FILETYPE_PEM, req))
os.close(destfd)
return req
def retrieve_key_from_file(keyfile):
fo = open(keyfile, 'r')
buf = fo.read()
keypair = crypto.load_privatekey(crypto.FILETYPE_PEM, buf)
return keypair
def retrieve_csr_from_file(csrfile):
fo = open(csrfile, 'r')
buf = fo.read()
csrreq = crypto.load_certificate_request(crypto.FILETYPE_PEM, buf)
return csrreq
def retrieve_cert_from_file(certfile):
fo = open(certfile, 'r')
buf = fo.read()
cert = crypto.load_certificate(crypto.FILETYPE_PEM, buf)
return cert
def create_ca(CN="Certmaster Certificate Authority", ca_key_file=None, ca_cert_file=None):
cakey = make_keypair(dest=ca_key_file)
careq = make_csr(cakey, cn=CN)
cacert = crypto.X509()
cacert.set_serial_number(0)
cacert.gmtime_adj_notBefore(0)
cacert.gmtime_adj_notAfter(60*60*24*365*10) # 10 yrs - hard to beat this kind of cert!
cacert.set_issuer(careq.get_subject())
cacert.set_subject(careq.get_subject())
cacert.set_pubkey(careq.get_pubkey())
cacert.sign(cakey, 'md5')
if ca_cert_file:
destfo = open(ca_cert_file, 'w')
destfo.write(crypto.dump_certificate(crypto.FILETYPE_PEM, cacert))
destfo.close()
def _get_serial_number(cadir):
serial = '%s/serial.txt' % cadir
i = 1
if os.path.exists(serial):
f = open(serial, 'r').read()
f = f.replace('\n','')
try:
i = int(f)
i+=1
except ValueError, e:
i = 1
_set_serial_number(cadir, i)
return i
def _set_serial_number(cadir, last):
serial = '%s/serial.txt' % cadir
f = open(serial, 'w')
f.write(str(last) + '\n')
f.close()
def create_slave_certificate(csr, cakey, cacert, cadir, slave_cert_file=None):
cert = crypto.X509()
cert.set_serial_number(_get_serial_number(cadir))
cert.gmtime_adj_notBefore(0)
cert.gmtime_adj_notAfter(60*60*24*365*10) # 10 yrs - hard to beat this kind of cert!
cert.set_issuer(cacert.get_subject())
cert.set_subject(csr.get_subject())
cert.set_pubkey(csr.get_pubkey())
cert.sign(cakey, 'md5')
if slave_cert_file:
destfo = open(slave_cert_file, 'w')
destfo.write(crypto.dump_certificate(crypto.FILETYPE_PEM, cert))
destfo.close()
return cert
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