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Diffstat (limited to 'src/leap/util/certs.py')
| -rw-r--r-- | src/leap/util/certs.py | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/src/leap/util/certs.py b/src/leap/util/certs.py deleted file mode 100644 index 63c60c3d..00000000 --- a/src/leap/util/certs.py +++ /dev/null @@ -1,179 +0,0 @@ -# -*- coding: utf-8 -*- -# certs.py -# Copyright (C) 2013 LEAP -# -# 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/>. - -""" -Implements cert checks and helpers -""" - -import os -import time -import logging - -from OpenSSL import crypto -from dateutil.parser import parse as dateparse - -from leap.util.check import leap_assert - -logger = logging.getLogger(__name__) - - -def get_cert_from_string(string): - """ - Returns the x509 from the contents of this string - - @param string: certificate contents as downloaded - @type string: str - - @return: x509 or None - """ - leap_assert(string, "We need something to load") - - x509 = None - try: - x509 = crypto.load_certificate(crypto.FILETYPE_PEM, string) - except Exception as e: - logger.error("Something went wrong while loading the certificate: %r" - % (e,)) - return x509 - - -def get_privatekey_from_string(string): - """ - Returns the private key from the contents of this string - - @param string: private key contents as downloaded - @type string: str - - @return: private key or None - """ - leap_assert(string, "We need something to load") - - pkey = None - try: - pkey = crypto.load_privatekey(crypto.FILETYPE_PEM, string) - except Exception as e: - logger.error("Something went wrong while loading the certificate: %r" - % (e,)) - return pkey - - -def get_digest(cert_data, method): - """ - Returns the digest for the cert_data using the method specified - - @param cert_data: certificate data in string form - @type cert_data: str - @param method: method to be used for digest - @type method: str - - @rtype: str - """ - x509 = get_cert_from_string(cert_data) - digest = x509.digest(method).replace(":", "").lower() - - return digest - - -def can_load_cert_and_pkey(string): - """ - Loads certificate and private key from a buffer, returns True if - everything went well, False otherwise - - @param string: buffer containing the cert and private key - @type string: str or any kind of buffer - - @rtype: bool - """ - can_load = True - - try: - cert = get_cert_from_string(string) - key = get_privatekey_from_string(string) - - leap_assert(cert, 'The certificate could not be loaded') - leap_assert(key, 'The private key could not be loaded') - except Exception as e: - can_load = False - logger.error("Something went wrong while trying to load " - "the certificate: %r" % (e,)) - - return can_load - - -def is_valid_pemfile(cert): - """ - Checks that the passed string is a valid pem certificate - - @param cert: String containing pem content - @type cert: str - - @rtype: bool - """ - leap_assert(cert, "We need a cert to load") - - return can_load_cert_and_pkey(cert) - - -def get_cert_time_boundaries(certfile): - """ - Returns the time boundaries for the certificate saved in certfile - - @param certfile: path to certificate - @type certfile: str - - @rtype: tuple (from, to) - """ - cert = get_cert_from_string(certfile) - leap_assert(cert, 'There was a problem loading the certificate') - - fromts, tots = (cert.get_notBefore(), cert.get_notAfter()) - from_, to_ = map( - lambda ts: time.gmtime(time.mktime(dateparse(ts).timetuple())), - (fromts, tots)) - return from_, to_ - - -def should_redownload(certfile, now=time.gmtime): - """ - Returns True if any of the checks don't pass, False otherwise - - @param certfile: path to certificate - @type certfile: str - @param now: current date function, ONLY USED FOR TESTING - - @rtype: bool - """ - exists = os.path.isfile(certfile) - - if not exists: - return True - - certdata = None - try: - with open(certfile, "r") as f: - certdata = f.read() - if not is_valid_pemfile(certdata): - return True - except: - return True - - valid_from, valid_to = get_cert_time_boundaries(certdata) - - if not (valid_from < now() < valid_to): - return True - - return False |