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# Authors: Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2009 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/>.
#
from ipapython import ipautil
from ipapython import nsslib
from ipalib import pkcs10
import tempfile
from ipalib.compat import sha1
import shutil
import os
CA_NICKNAME_FMT = "%s IPA CA"
def get_ca_nickname(realm, format=CA_NICKNAME_FMT):
return format % realm
class CertDB(object):
"""
To be used for temporary NSS databases only. If temporary is set then
this willcompletely remove the database it is working on when the
class is destroyed.
"""
def __init__(self, secdir, password=None, temporary=False):
if secdir is None:
secdir = tempfile.mkdtemp(prefix = "certdb-")
if password is None:
password = self.generate_random()
self.secdir = secdir
self.password = password
self.temporary = temporary
self.noise_file = secdir + "/noise"
self.pwd_file = secdir + "/pwd"
self.csr_file = secdir + "/csr.txt"
f = open(self.pwd_file, "w")
f.write(self.password)
f.close()
if not ipautil.file_exists(secdir + "/secmod.db"):
self.run_certutil(["-N", "-f", self.pwd_file])
def __del__(self):
if self.temporary:
shutil.rmtree(self.secdir)
else:
# clean up
if ipautil.file_exists(self.noise_file):
os.remove(self.noise_file)
def run_certutil(self, args, stdin=None):
new_args = ["/usr/bin/certutil", "-d", self.secdir]
new_args = new_args + args
return ipautil.run(new_args, stdin)
def generate_random(self):
return sha1(ipautil.ipa_generate_password()).hexdigest()
def create_noise_file(self):
"""
Generate a noise file to be used when creating a key
"""
if ipautil.file_exists(self.noise_file):
os.remove(self.noise_file)
f = open(self.noise_file, "w")
f.write(self.generate_random())
f.close()
return
def generate_csr(self, subject, keysize=2048, keytype="rsa"):
"""
Generate a Certificate Signing Request (CSR) and return as a
string the base-64 result with the BEGIN/END block.
"""
self.create_noise_file()
args = ["-R", "-s", subject,
"-o", self.csr_file,
"-k", keytype,
"-g", str(keysize),
"-z", self.noise_file,
"-f", self.pwd_file,
"-a"]
self.run_certutil(args)
# read in the CSR
f = open(self.csr_file, "r")
csr = f.readlines()
f.close()
csr = "".join(csr)
csr = pkcs10.strip_header(csr)
return csr
def add_certificate(self, cert_file, nickname="Server-Cert", is_ca=False):
"""
Add a certificate to our NSS database.
Only supports base64-encoded certificates, not DER-encoded.
"""
if is_ca:
trust_flag="CT,C,C"
else:
trust_flag="u,u,u"
# Import a certificate from an ASCII file
args = ["-A",
"-n", nickname,
"-t", trust_flag,
"-i", cert_file,
"-f", self.pwd_file,
"-a"]
self.run_certutil(args)
def create_pkcs12(self, pkcs12_file, nickname="Server-Cert", password=None):
if password is None:
password = self.password
p12pwd_file = self.secdir + "/pkcs12_pwd"
f = open(p12pwd_file, "w")
f.write(password)
f.close()
args = ["/usr/bin/pk12util",
"-d", self.secdir,
"-o", pkcs12_file,
"-n", nickname,
"-k", self.pwd_file,
"-w", p12pwd_file]
ipautil.run(args)
return password
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