commit
4eb2c17652
4 changed files with 570 additions and 0 deletions
@ -0,0 +1,3 @@ |
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__pycache__ |
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*~ |
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*.swp |
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@ -0,0 +1,541 @@ |
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# coding: utf-8 |
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|
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import click |
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import const |
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import hashlib |
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import logging |
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import os |
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import random |
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import re |
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import signal |
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import string |
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import socket |
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import subprocess |
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import sys |
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import requests |
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from jinja2 import Environment, PackageLoader |
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from ipsecparse import loads |
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from asn1crypto import pem, x509 |
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from asn1crypto.csr import CertificationRequest |
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from certbuilder import CertificateBuilder, pem_armor_certificate |
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from csrbuilder import CSRBuilder, pem_armor_csr |
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from configparser import ConfigParser, NoOptionError |
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from datetime import datetime, timedelta |
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from oscrypto import asymmetric |
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|
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class ConfigTreeParser(ConfigParser): |
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def __init__(self, path, *args, **kwargs): |
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ConfigParser.__init__(self, *args, **kwargs) |
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if os.path.exists(path): |
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with open(path) as fh: |
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click.echo("Parsing: %s" % fh.name) |
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self.read_file(fh) |
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if os.path.exists(path + ".d"): |
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for filename in os.listdir(path + ".d"): |
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if not filename.endswith(".conf"): |
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continue |
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with open(os.path.join(path + ".d", filename)) as fh: |
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click.echo("Parsing: %s" % fh.name) |
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self.read_file(fh) |
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|
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|
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@click.command("provision", help="Add endpoint to Certidude client config") |
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@click.argument("authority") |
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def certidude_provision(authority): |
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client_config = ConfigParser() |
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if os.path.exists(const.CLIENT_CONFIG_PATH): |
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client_config.read_file(open(const.CLIENT_CONFIG_PATH)) |
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if client_config.has_section(authority): |
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click.echo("Section '%s' already exists in %s, remove to regenerate" % (authority, const.CLIENT_CONFIG_PATH)) |
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else: |
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click.echo("Section '%s' added to %s" % (authority, const.CLIENT_CONFIG_PATH)) |
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b = os.path.join(os.path.join(const.CONFIG_DIR, "authority", authority)) |
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client_config.add_section(authority) |
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client_config.set(authority, "trigger", "interface up") |
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client_config.set(authority, "common name", "$HOSTNAME") |
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client_config.set(authority, "request path", os.path.join(b, "host_req.pem")) |
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client_config.set(authority, "key path", os.path.join(b, "host_key.pem")) |
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client_config.set(authority, "certificate path", os.path.join(b, "host_cert.pem")) |
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client_config.set(authority, "authority path", os.path.join(b, "ca_cert.pem")) |
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with open(const.CLIENT_CONFIG_PATH + ".part", 'w') as fh: |
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client_config.write(fh) |
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os.rename(const.CLIENT_CONFIG_PATH + ".part", const.CLIENT_CONFIG_PATH) |
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|
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|
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@click.command("enroll", help="Run processes for requesting certificates and configuring services") |
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@click.option("-k", "--kerberos", default=False, is_flag=True, help="Offer system keytab for auth") |
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@click.option("-f", "--fork", default=False, is_flag=True, help="Fork to background") |
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@click.option("-nw", "--no-wait", default=False, is_flag=True, help="Return immideately if server doesn't autosign") |
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def certidude_enroll(fork, no_wait, kerberos): |
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try: |
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os.makedirs(const.RUN_DIR) |
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except FileExistsError: |
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pass |
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|
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context = globals() |
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context.update(locals()) |
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|
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if not os.path.exists(const.CLIENT_CONFIG_PATH): |
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click.echo("Client not configured, so not going to enroll") |
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return |
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|
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clients = ConfigTreeParser(const.CLIENT_CONFIG_PATH) |
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service_config = ConfigTreeParser(const.SERVICES_CONFIG_PATH) |
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|
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for authority_name in clients.sections(): |
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try: |
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trigger = clients.get(authority_name, "trigger") |
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except NoOptionError: |
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trigger = "interface up" |
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|
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if trigger == "domain joined": |
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# Stop further processing if command line argument said so or trigger expects domain membership |
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if not os.path.exists("/etc/krb5.keytab"): |
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continue |
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kerberos = True |
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elif trigger == "interface up": |
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pass |
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else: |
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raise |
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|
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|
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######################### |
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### Fork if requested ### |
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######################### |
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pid_path = os.path.join(const.RUN_DIR, authority_name + ".pid") |
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try: |
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with open(pid_path) as fh: |
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pid = int(fh.readline()) |
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os.kill(pid, signal.SIGTERM) |
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click.echo("Terminated process %d" % pid) |
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os.unlink(pid_path) |
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except EnvironmentError: |
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pass |
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|
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if fork: |
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child_pid = os.fork() |
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else: |
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child_pid = None |
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|
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if child_pid: |
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click.echo("Spawned certificate request process with PID %d" % (child_pid)) |
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continue |
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|
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with open(pid_path, "w") as fh: |
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fh.write("%d\n" % os.getpid()) |
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|
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try: |
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authority_path = clients.get(authority_name, "authority path") |
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except NoOptionError: |
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authority_path = "/etc/certidude/authority/%s/ca_cert.pem" % authority_name |
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finally: |
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if os.path.exists(authority_path): |
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click.echo("Found authority certificate in: %s" % authority_path) |
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with open(authority_path, "rb") as fh: |
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header, _, certificate_der_bytes = pem.unarmor(fh.read()) |
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authority_certificate = x509.Certificate.load(certificate_der_bytes) |
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else: |
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if not os.path.exists(os.path.dirname(authority_path)): |
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os.makedirs(os.path.dirname(authority_path)) |
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authority_url = "http://%s/api/certificate/" % authority_name |
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click.echo("Attempting to fetch authority certificate from %s" % authority_url) |
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try: |
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r = requests.get(authority_url, |
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headers={"Accept": "application/x-x509-ca-cert,application/x-pem-file"}) |
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header, _, certificate_der_bytes = pem.unarmor(r.content) |
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authority_certificate = x509.Certificate.load(certificate_der_bytes) |
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except: # TODO: catch correct exceptions |
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raise |
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# raise ValueError("Failed to parse PEM: %s" % r.text) |
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authority_partial = authority_path + ".part" |
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with open(authority_partial, "wb") as oh: |
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oh.write(r.content) |
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click.echo("Writing authority certificate to: %s" % authority_path) |
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selinux_fixup(authority_partial) |
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os.rename(authority_partial, authority_path) |
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authority_public_key = asymmetric.load_public_key( |
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authority_certificate["tbs_certificate"]["subject_public_key_info"]) |
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|
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# Attempt to install CA certificates system wide |
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try: |
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authority_system_wide = clients.getboolean(authority_name, "system wide") |
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except NoOptionError: |
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authority_system_wide = False |
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finally: |
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if authority_system_wide: |
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# Firefox, Chromium, wget, curl on Fedora |
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# Note that if ~/.pki/nssdb has been customized before, curl breaks |
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if os.path.exists("/usr/bin/update-ca-trust"): |
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link_path = "/etc/pki/ca-trust/source/anchors/%s" % authority_name |
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if not os.path.lexists(link_path): |
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os.symlink(authority_path, link_path) |
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os.system("update-ca-trust") |
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|
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# curl on Fedora ? |
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# pip |
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|
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# Firefox (?) on Debian, Ubuntu |
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if os.path.exists("/usr/bin/update-ca-certificates") or os.path.exists("/usr/sbin/update-ca-certificates"): |
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link_path = "/usr/local/share/ca-certificates/%s" % authority_name |
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if not os.path.lexists(link_path): |
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os.symlink(authority_path, link_path) |
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os.system("update-ca-certificates") |
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# TODO: test for curl, wget |
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try: |
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common_name = clients.get(authority_name, "common name") |
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except NoOptionError: |
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click.echo("No common name specified for %s, not requesting a certificate" % authority_name) |
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continue |
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|
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# If deriving common name from *current* hostname is preferred |
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if common_name == "$HOSTNAME": |
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common_name = const.HOSTNAME |
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elif common_name == "$FQDN": |
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common_name = const.FQDN |
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elif "$" in common_name: |
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raise ValueError("Invalid variable '%s' supplied, only $HOSTNAME and $FQDN allowed" % common_name) |
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if not re.match(const.RE_COMMON_NAME, common_name): |
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raise ValueError("Supplied common name %s doesn't match the expression %s" % (common_name, const.RE_COMMON_NAME)) |
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|
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################################ |
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### Generate keypair and CSR ### |
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################################ |
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try: |
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key_path = clients.get(authority_name, "key path") |
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request_path = clients.get(authority_name, "request path") |
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except NoOptionError: |
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key_path = "/etc/certidude/authority/%s/host_key.pem" % authority_name |
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request_path = "/etc/certidude/authority/%s/host_csr.pem" % authority_name |
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if os.path.exists(request_path): |
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with open(request_path, "rb") as fh: |
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header, _, der_bytes = pem.unarmor(fh.read()) |
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csr = CertificationRequest.load(der_bytes) |
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if csr["certification_request_info"]["subject"].native["common_name"] != common_name: |
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click.echo("Stored request's common name differs from currently requested one, deleting old request") |
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os.remove(request_path) |
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if not os.path.exists(request_path): |
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key_partial = key_path + ".part" |
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request_partial = request_path + ".part" |
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if authority_public_key.algorithm == "ec": |
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self_public_key, private_key = asymmetric.generate_pair("ec", curve=authority_public_key.curve) |
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elif authority_public_key.algorithm == "rsa": |
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self_public_key, private_key = asymmetric.generate_pair("rsa", bit_size=authority_public_key.bit_size) |
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else: |
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NotImplemented |
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builder = CSRBuilder({"common_name": common_name}, self_public_key) |
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request = builder.build(private_key) |
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with open(key_partial, 'wb') as f: |
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f.write(asymmetric.dump_private_key(private_key, None)) |
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with open(request_partial, 'wb') as f: |
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f.write(pem_armor_csr(request)) |
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selinux_fixup(key_partial) |
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selinux_fixup(request_partial) |
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os.rename(key_partial, key_path) |
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os.rename(request_partial, request_path) |
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############################################## |
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### Submit CSR and save signed certificate ### |
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############################################## |
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try: |
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certificate_path = clients.get(authority_name, "certificate path") |
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except NoOptionError: |
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certificate_path = "/etc/certidude/authority/%s/host_cert.pem" % authority_name |
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try: |
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autosign = clients.getboolean(authority_name, "autosign") |
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except NoOptionError: |
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autosign = True |
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if not os.path.exists(certificate_path): |
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# Set up URL-s |
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request_params = set() |
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request_params.add("autosign=%s" % ("yes" if autosign else "no")) |
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if not no_wait: |
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request_params.add("wait=forever") |
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kwargs = { |
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"data": open(request_path), |
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"verify": authority_path, |
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"headers": { |
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"Content-Type": "application/pkcs10", |
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"Accept": "application/x-x509-user-cert,application/x-pem-file" |
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} |
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} |
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# If machine is joined to domain attempt to present machine credentials for authentication |
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if kerberos: |
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try: |
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from requests_kerberos import HTTPKerberosAuth, OPTIONAL |
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except ImportError: |
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click.echo("Kerberos bindings not available, please install requests-kerberos") |
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else: |
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os.environ["KRB5CCNAME"]="/tmp/ca.ticket" |
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# Mac OS X has keytab with lowercase hostname |
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cmd = "kinit -S HTTP/%s -k %s$" % (authority_name, const.HOSTNAME.lower()) |
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click.echo("Executing: %s" % cmd) |
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if os.system(cmd): |
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# Fedora /w SSSD has keytab with uppercase hostname |
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cmd = "kinit -S HTTP/%s -k %s$" % (authority_name, const.HOSTNAME.upper()) |
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if os.system(cmd): |
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# Failed, probably /etc/krb5.keytab contains spaghetti |
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raise ValueError("Failed to initialize Kerberos service ticket using machine keytab") |
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assert os.path.exists("/tmp/ca.ticket"), "Ticket not created!" |
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click.echo("Initialized Kerberos service ticket using machine keytab") |
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kwargs["auth"] = HTTPKerberosAuth(mutual_authentication=OPTIONAL, force_preemptive=True) |
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else: |
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click.echo("Not using machine keytab") |
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request_url = "https://%s:8443/api/request/" % authority_name |
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if request_params: |
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request_url = request_url + "?" + "&".join(request_params) |
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submission = requests.post(request_url, **kwargs) |
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# Destroy service ticket |
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if os.path.exists("/tmp/ca.ticket"): |
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os.system("kdestroy") |
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if submission.status_code == requests.codes.ok: |
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pass |
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if submission.status_code == requests.codes.accepted: |
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click.echo("Server accepted the request, but refused to sign immideately (%s). Waiting was not requested, hence quitting for now" % submission.text) |
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os.unlink(pid_path) |
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continue |
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if submission.status_code == requests.codes.conflict: |
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raise errors.DuplicateCommonNameError("Different signing request with same CN is already present on server, server refuses to overwrite") |
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elif submission.status_code == requests.codes.gone: |
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# Should the client retry or disable request submission? |
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raise ValueError("Server refused to sign the request") # TODO: Raise proper exception |
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elif submission.status_code == requests.codes.bad_request: |
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raise ValueError("Server said following, likely current certificate expired/revoked? %s" % submission.text) |
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else: |
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submission.raise_for_status() |
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|
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try: |
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header, _, certificate_der_bytes = pem.unarmor(submission.content) |
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cert = x509.Certificate.load(certificate_der_bytes) |
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except: # TODO: catch correct exceptions |
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raise ValueError("Failed to parse PEM: %s" % submission.text) |
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assert cert.subject.native["common_name"] == common_name, \ |
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"Expected certificate with common name %s, but got %s instead" % \ |
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(common_name, cert.subject.native["common_name"]) |
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os.umask(0o022) |
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certificate_partial = certificate_path + ".part" |
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with open(certificate_partial, "w") as fh: |
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# Dump certificate |
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fh.write(submission.text) |
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click.echo("Writing certificate to: %s" % certificate_path) |
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selinux_fixup(certificate_partial) |
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os.rename(certificate_partial, certificate_path) |
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else: |
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click.echo("Certificate found at %s and no renewal requested" % certificate_path) |
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|
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################################## |
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### Configure related services ### |
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################################## |
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|
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for endpoint in service_config.sections(): |
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if service_config.get(endpoint, "authority") != authority_name: |
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continue |
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|
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click.echo("Configuring '%s'" % endpoint) |
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csummer = hashlib.sha1() |
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csummer.update(endpoint.encode("ascii")) |
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csum = csummer.hexdigest() |
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uuid = csum[:8] + "-" + csum[8:12] + "-" + csum[12:16] + "-" + csum[16:20] + "-" + csum[20:32] |
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|
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# Intranet HTTPS handled by PKCS#12 bundle generation, |
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# so it will not be implemented here |
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|
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# OpenVPN set up with initscripts |
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if service_config.get(endpoint, "service") == "init/openvpn": |
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if os.path.exists("/etc/openvpn/%s.disabled" % endpoint) and not os.path.exists("/etc/openvpn/%s.conf" % endpoint): |
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os.rename("/etc/openvpn/%s.disabled" % endpoint, "/etc/openvpn/%s.conf" % endpoint) |
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if os.path.exists("/bin/systemctl"): |
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click.echo("Re-running systemd generators for OpenVPN...") |
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os.system("systemctl daemon-reload") |
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if not os.path.exists("/etc/systemd/system/openvpn-reconnect.service"): |
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with open("/etc/systemd/system/openvpn-reconnect.service.part", "w") as fh: |
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fh.write(env.get_template("client/openvpn-reconnect.service").render(context)) |
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os.rename("/etc/systemd/system/openvpn-reconnect.service.part", |
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"/etc/systemd/system/openvpn-reconnect.service") |
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click.echo("Created /etc/systemd/system/openvpn-reconnect.service") |
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click.echo("Starting OpenVPN...") |
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os.system("service openvpn start") |
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continue |
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|
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# IPSec set up with initscripts |
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if service_config.get(endpoint, "service") == "init/strongswan": |
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config = loads(open("%s/ipsec.conf" % const.STRONGSWAN_PREFIX).read()) |
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for section_type, section_name in config: |
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# Identify correct ipsec.conf section by leftcert |
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if section_type != "conn": |
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continue |
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if config[section_type,section_name]["leftcert"] != certificate_path: |
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continue |
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|
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if config[section_type,section_name].get("left", "") == "%defaultroute": |
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config[section_type,section_name]["auto"] = "start" # This is client |
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elif config[section_type,section_name].get("leftsourceip", ""): |
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config[section_type,section_name]["auto"] = "add" # This is server |
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else: |
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config[section_type,section_name]["auto"] = "route" # This is site-to-site tunnel |
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|
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with open("%s/ipsec.conf.part" % const.STRONGSWAN_PREFIX, "w") as fh: |
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fh.write(config.dumps()) |
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os.rename( |
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"%s/ipsec.conf.part" % const.STRONGSWAN_PREFIX, |
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"%s/ipsec.conf" % const.STRONGSWAN_PREFIX) |
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break |
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|
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# Tune AppArmor profile, TODO: retain contents |
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if os.path.exists("/etc/apparmor.d/local"): |
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with open("/etc/apparmor.d/local/usr.lib.ipsec.charon", "w") as fh: |
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fh.write(key_path + " r,\n") |
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fh.write(authority_path + " r,\n") |
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fh.write(certificate_path + " r,\n") |
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|
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# Attempt to reload config or start if it's not running |
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if os.path.exists("/usr/sbin/strongswan"): # wtf fedora |
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if os.system("strongswan update"): |
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os.system("strongswan start") |
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else: |
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if os.system("ipsec update"): |
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os.system("ipsec start") |
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|
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continue |
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|
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# OpenVPN set up with NetworkManager |
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if service_config.get(endpoint, "service") == "network-manager/openvpn": |
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# NetworkManager-strongswan-gnome |
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nm_config_path = os.path.join("/etc/NetworkManager/system-connections", endpoint) |
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if os.path.exists(nm_config_path): |
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click.echo("Not creating %s, remove to regenerate" % nm_config_path) |
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continue |
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nm_config = ConfigParser() |
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nm_config.add_section("connection") |
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nm_config.set("connection", "certidude managed", "true") |
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nm_config.set("connection", "id", endpoint) |
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nm_config.set("connection", "uuid", uuid) |
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nm_config.set("connection", "type", "vpn") |
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nm_config.add_section("vpn") |
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nm_config.set("vpn", "service-type", "org.freedesktop.NetworkManager.openvpn") |
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nm_config.set("vpn", "connection-type", "tls") |
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nm_config.set("vpn", "comp-lzo", "no") |
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nm_config.set("vpn", "cert-pass-flags", "0") |
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nm_config.set("vpn", "tap-dev", "no") |
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nm_config.set("vpn", "remote-cert-tls", "server") # Assert TLS Server flag of X.509 certificate |
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nm_config.set("vpn", "remote", service_config.get(endpoint, "remote")) |
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nm_config.set("vpn", "key", key_path) |
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nm_config.set("vpn", "cert", certificate_path) |
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nm_config.set("vpn", "ca", authority_path) |
|||
nm_config.set("vpn", "tls-cipher", "TLS-%s-WITH-AES-256-GCM-SHA384" % ( |
|||
"ECDHE-ECDSA" if authority_public_key.algorithm == "ec" else "DHE-RSA")) |
|||
nm_config.set("vpn", "cipher", "AES-128-GCM") |
|||
nm_config.set("vpn", "auth", "SHA384") |
|||
nm_config.add_section("ipv4") |
|||
nm_config.set("ipv4", "method", "auto") |
|||
nm_config.set("ipv4", "never-default", "true") |
|||
nm_config.add_section("ipv6") |
|||
nm_config.set("ipv6", "method", "auto") |
|||
|
|||
try: |
|||
nm_config.set("vpn", "port", str(service_config.getint(endpoint, "port"))) |
|||
except NoOptionError: |
|||
nm_config.set("vpn", "port", "1194") |
|||
|
|||
try: |
|||
if service_config.get(endpoint, "proto") == "tcp": |
|||
nm_config.set("vpn", "proto-tcp", "yes") |
|||
except NoOptionError: |
|||
pass |
|||
|
|||
# Prevent creation of files with liberal permissions |
|||
os.umask(0o177) |
|||
|
|||
# Write NetworkManager configuration |
|||
with open(nm_config_path, "w") as fh: |
|||
nm_config.write(fh) |
|||
click.echo("Created %s" % nm_config_path) |
|||
if os.path.exists("/run/NetworkManager"): |
|||
os.system("nmcli con reload") |
|||
continue |
|||
|
|||
|
|||
# IPSec set up with NetworkManager |
|||
if service_config.get(endpoint, "service") == "network-manager/strongswan": |
|||
client_config = ConfigParser() |
|||
nm_config = ConfigParser() |
|||
nm_config.add_section("connection") |
|||
nm_config.set("connection", "certidude managed", "true") |
|||
nm_config.set("connection", "id", endpoint) |
|||
nm_config.set("connection", "uuid", uuid) |
|||
nm_config.set("connection", "type", "vpn") |
|||
nm_config.add_section("vpn") |
|||
nm_config.set("vpn", "service-type", "org.freedesktop.NetworkManager.strongswan") |
|||
nm_config.set("vpn", "encap", "no") |
|||
nm_config.set("vpn", "virtual", "yes") |
|||
nm_config.set("vpn", "method", "key") |
|||
nm_config.set("vpn", "ipcomp", "no") |
|||
nm_config.set("vpn", "address", service_config.get(endpoint, "remote")) |
|||
nm_config.set("vpn", "userkey", key_path) |
|||
nm_config.set("vpn", "usercert", certificate_path) |
|||
nm_config.set("vpn", "certificate", authority_path) |
|||
dhgroup = "ecp384" if authority_public_key.algorithm == "ec" else "modp2048" |
|||
nm_config.set("vpn", "ike", "aes256-sha384-prfsha384-" + dhgroup) |
|||
nm_config.set("vpn", "esp", "aes128gcm16-aes128gmac-" + dhgroup) |
|||
nm_config.set("vpn", "proposal", "yes") |
|||
|
|||
nm_config.add_section("ipv4") |
|||
nm_config.set("ipv4", "method", "auto") |
|||
|
|||
# Add routes, may need some more tweaking |
|||
if service_config.has_option(endpoint, "route"): |
|||
for index, subnet in enumerate(service_config.get(endpoint, "route").split(","), start=1): |
|||
nm_config.set("ipv4", "route%d" % index, subnet) |
|||
|
|||
# Prevent creation of files with liberal permissions |
|||
os.umask(0o177) |
|||
|
|||
# Write NetworkManager configuration |
|||
with open(os.path.join("/etc/NetworkManager/system-connections", endpoint), "w") as fh: |
|||
nm_config.write(fh) |
|||
click.echo("Created %s" % fh.name) |
|||
if os.path.exists("/run/NetworkManager"): |
|||
os.system("nmcli con reload") |
|||
continue |
|||
|
|||
# TODO: Puppet, OpenLDAP, <insert awesomeness here> |
|||
click.echo("Unknown service: %s" % service_config.get(endpoint, "service")) |
|||
os.unlink(pid_path) |
|||
|
|||
|
|||
@click.group() |
|||
def entry_point(): pass |
|||
|
|||
|
|||
entry_point.add_command(certidude_enroll) |
|||
entry_point.add_command(certidude_provision) |
|||
|
|||
if __name__ == "__main__": |
|||
entry_point() |
|||
@ -0,0 +1,22 @@ |
|||
import os |
|||
import socket |
|||
|
|||
RUN_DIR = "/run/certidude" |
|||
CONFIG_DIR = "/etc/certidude" |
|||
CLIENT_CONFIG_PATH = os.path.join(CONFIG_DIR, "client.conf") |
|||
SERVICES_CONFIG_PATH = os.path.join(CONFIG_DIR, "services.conf") |
|||
|
|||
RE_FQDN = "^(([a-z0-9]|[a-z0-9][a-z0-9\-_]*[a-z0-9])\.)+([a-z0-9]|[a-z0-9][a-z0-9\-_]*[a-z0-9])?$" |
|||
RE_HOSTNAME = "^[a-z0-9]([a-z0-9\-_]{0,61}[a-z0-9])?$" |
|||
RE_COMMON_NAME = "^[A-Za-z0-9\-\.\_@]+$" |
|||
|
|||
try: |
|||
FQDN = socket.getaddrinfo(socket.gethostname(), 0, socket.AF_INET, 0, 0, socket.AI_CANONNAME)[0][3] |
|||
except socket.gaierror: |
|||
FQDN = socket.gethostname() |
|||
|
|||
try: |
|||
HOSTNAME, DOMAIN = FQDN.split(".", 1) |
|||
except ValueError: # If FQDN is not configured |
|||
HOSTNAME = FQDN |
|||
DOMAIN = None |
|||
@ -0,0 +1,4 @@ |
|||
asn1crypto |
|||
certbuilder |
|||
csrbuilder |
|||
ipsecparse |
|||
Loading…
Reference in new issue