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freeipa/ipatests/test_integration/test_acme.py
Mohammad Rizwan 6b544c4362 ipatests: remove redundant kinit from test 
Fixture issue_and_expire_cert() kinit after moving the date to
expire certs. This fix is to rely on kinit from fixture.

Signed-off-by: Mohammad Rizwan <myusuf@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
2021-11-03 10:55:49 +01:00

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#
# Copyright (C) 2020 FreeIPA Contributors see COPYING for license
#
import time
from cryptography.hazmat.backends import default_backend
from cryptography import x509
import pytest
from ipalib.constants import IPA_CA_RECORD
from ipatests.test_integration.base import IntegrationTest
from ipatests.pytest_ipa.integration import tasks
from ipatests.test_integration.test_caless import CALessBase, ipa_certs_cleanup
from ipaplatform.osinfo import osinfo
from ipaplatform.paths import paths
from ipatests.test_integration.test_external_ca import (
install_server_external_ca_step1,
install_server_external_ca_step2,
)
IPA_CA = "ipa_ca.crt"
ROOT_CA = "root_ca.crt"
# RHEL does not have certbot. EPEL's version is broken with
# python-cryptography-2.3; likewise recent PyPI releases.
# So for now, on RHEL we suppress tests that use certbot.
skip_certbot_tests = osinfo.id not in ['fedora', 'rhel']
# Fedora mod_md package needs some patches before it will work.
# RHEL version has the patches.
skip_mod_md_tests = osinfo.id not in ['rhel', 'fedora', ]
CERTBOT_DNS_IPA_SCRIPT = '/usr/libexec/ipa/acme/certbot-dns-ipa'
def check_acme_status(host, exp_status, timeout=60):
"""Helper method to check the status of acme server"""
for _i in range(0, timeout, 5):
result = host.run_command(['ipa-acme-manage', 'status'])
status = result.stdout_text.split(" ")[2].strip()
print("ACME status: %s" % status)
if status == exp_status:
break
time.sleep(5)
else:
raise RuntimeError("request timed out")
return status
def get_selinux_status(host):
"""
Return the SELinux enforcing status.
Return True if enabled and enforcing, otherwise False
"""
result = host.run_command(['/usr/sbin/selinuxenabled'], raiseonerr=False)
if result.returncode != 0:
return False
result = host.run_command(['/usr/sbin/getenforce'], raiseonerr=False)
if 'Enforcing' in result.stdout_text:
return True
return False
def server_install_teardown(func):
def wrapped(*args):
master = args[0].master
try:
func(*args)
finally:
ipa_certs_cleanup(master)
return wrapped
def prepare_acme_client(master, client):
# cache the acme service uri
acme_host = f'{IPA_CA_RECORD}.{master.domain.name}'
acme_server = f'https://{acme_host}/acme/directory'
# install acme client packages
if not skip_certbot_tests:
tasks.install_packages(client, ['certbot'])
if not skip_mod_md_tests:
tasks.install_packages(client, ['mod_md'])
return acme_server
def certbot_register(host, acme_server):
"""method to register the host to acme server"""
# clean up any existing registration and certificates
host.run_command(
[
'rm', '-rf',
'/etc/letsencrypt/accounts',
'/etc/letsencrypt/archive',
'/etc/letsencrypt/csr',
'/etc/letsencrypt/keys',
'/etc/letsencrypt/live',
'/etc/letsencrypt/renewal',
'/etc/letsencrypt/renewal-hooks'
]
)
# service is enabled; registration should succeed
host.run_command(
[
'certbot',
'--server', acme_server,
'register',
'-m', 'nobody@example.test',
'--agree-tos',
'--no-eff-email',
],
)
def certbot_standalone_cert(host, acme_server):
"""method to issue a certbot's certonly standalone cert"""
# Get a cert from ACME service using HTTP challenge and Certbot's
# standalone HTTP server mode
host.run_command(['systemctl', 'stop', 'httpd'])
host.run_command(
[
'certbot',
'--server', acme_server,
'certonly',
'--domain', host.hostname,
'--standalone',
]
)
class TestACME(CALessBase):
"""
Test the FreeIPA ACME service by using ACME clients on a FreeIPA client.
We currently test:
* service enable/disable (using Curl)
* http-01 challenge with Certbot's standalone HTTP server
* dns-01 challenge with Certbot and FreeIPA DNS via hook scripts
* revocation with Certbot
* http-01 challenge with mod_md
Tests we should add:
* dns-01 challenge with mod_md (see
https://httpd.apache.org/docs/current/mod/mod_md.html#mdchallengedns01)
Things that are not implmented/supported yet, but may be in future:
* IP address SAN
* tls-alpn-01 challenge
* Other clients or service scenarios
"""
num_replicas = 1
num_clients = 1
@classmethod
def install(cls, mh):
super(TestACME, cls).install(mh)
# install packages before client install in case of IPA DNS problems
cls.acme_server = prepare_acme_client(cls.master, cls.clients[0])
# Each subclass handles its own server installation procedure
if cls.__name__ != 'TestACME':
return
tasks.install_master(cls.master, setup_dns=True)
tasks.install_client(cls.master, cls.clients[0])
tasks.install_replica(cls.master, cls.replicas[0])
def certinstall(self, certfile=None, keyfile=None,
pin=None):
"""Small wrapper around ipa-server-certinstall
We are always replacing only the web server with a fixed
pre-generated value and returning the result for the caller
to figure out.
"""
self.create_pkcs12('ca1/server', password=None, filename='server.p12')
self.copy_cert(self.master, 'server.p12')
if pin is None:
pin = self.cert_password
args = ['ipa-server-certinstall',
'-p', self.master.config.dirman_password,
'--pin', pin,
'-w']
if certfile: # implies keyfile
args.append(certfile)
args.append(keyfile)
else:
args.append('server.p12')
return self.master.run_command(args,
raiseonerr=False)
#######
# kinit
#######
def test_kinit_master(self):
# Some tests require executing ipa commands, e.g. to
# check revocation status or add/remove DNS entries.
# Preemptively kinit as admin on the master.
tasks.kinit_admin(self.master)
#####################
# Enable ACME service
#####################
def test_acme_service_not_yet_enabled(self):
# --fail makes curl exit code 22 when response status >= 400.
# ACME service should return 503 because it was not enabled yet.
self.clients[0].run_command(
['curl', '--fail', self.acme_server],
ok_returncode=22,
)
result = self.master.run_command(['ipa-acme-manage', 'status'])
assert 'disabled' in result.stdout_text
def test_enable_acme_service(self):
self.master.run_command(['ipa-acme-manage', 'enable'])
# wait a short time for Dogtag ACME service to observe config
# change and reconfigure itself to service requests
exc = None
for _i in range(5):
time.sleep(2)
try:
self.clients[0].run_command(
['curl', '--fail', self.acme_server])
break
except Exception as e:
exc = e
else:
raise exc
def test_centralize_acme_enable(self):
"""Test if ACME enable on replica if enabled on master"""
status = check_acme_status(self.replicas[0], 'enabled')
assert status == 'enabled'
###############
# Certbot tests
###############
@pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
def test_certbot_register(self):
certbot_register(self.clients[0], self.acme_server)
@pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
def test_certbot_certonly_standalone(self):
certbot_standalone_cert(self.clients[0], self.acme_server)
@pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
def test_certbot_revoke(self):
# Assume previous certonly operation succeeded.
# Read certificate to learn serial number.
cert_path = \
f'/etc/letsencrypt/live/{self.clients[0].hostname}/cert.pem'
data = self.clients[0].get_file_contents(cert_path)
cert = x509.load_pem_x509_certificate(data, backend=default_backend())
# revoke cert via ACME
self.clients[0].run_command(
[
'certbot',
'--server', self.acme_server,
'revoke',
'--cert-name', self.clients[0].hostname,
'--delete-after-revoke',
],
)
# check cert is revoked (kinit already performed)
result = self.master.run_command(
['ipa', 'cert-show', str(cert.serial_number), '--raw']
)
assert 'revocation_reason:' in result.stdout_text
@pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
def test_certbot_dns(self):
# Assume previous revoke operation succeeded and cert was deleted.
# We can now request a new certificate.
# Get a cert from ACME service using dns-01 challenge and Certbot's
# standalone HTTP server mode
self.clients[0].run_command([
'certbot',
'--server', self.acme_server,
'certonly',
'--non-interactive',
'--domain', self.clients[0].hostname,
'--preferred-challenges', 'dns',
'--manual',
'--manual-public-ip-logging-ok',
'--manual-auth-hook', CERTBOT_DNS_IPA_SCRIPT,
'--manual-cleanup-hook', CERTBOT_DNS_IPA_SCRIPT,
])
##############
# mod_md tests
##############
@pytest.mark.skipif(skip_mod_md_tests, reason='mod_md not available')
def test_mod_md(self):
if get_selinux_status(self.clients[0]):
# mod_md requires its own SELinux policy to grant perms to
# maintaining ACME registration and cert state.
raise pytest.skip("SELinux is enabled, this will fail")
# write config
self.clients[0].run_command(['mkdir', '-p', '/etc/httpd/conf.d'])
self.clients[0].run_command(['mkdir', '-p', '/etc/httpd/md'])
self.clients[0].put_file_contents(
'/etc/httpd/conf.d/md.conf',
'\n'.join([
f'MDCertificateAuthority {self.acme_server}',
'MDCertificateAgreement accepted',
'MDStoreDir /etc/httpd/md',
f'MDomain {self.clients[0].hostname}',
'<VirtualHost *:443>',
f' ServerName {self.clients[0].hostname}',
' SSLEngine on',
'</VirtualHost>\n',
]),
)
# To check for successful cert issuance means knowing how mod_md
# stores certificates, or looking for specific log messages.
# If the thing we are inspecting changes, the test will break.
# So I prefer a conservative sleep.
#
self.clients[0].run_command(['systemctl', 'restart', 'httpd'])
time.sleep(15)
# We expect mod_md has acquired the certificate by now.
# Perform a graceful restart to begin using the cert.
# (If mod_md ever learns to start using newly acquired
# certificates /without/ the second restart, then both
# of these sleeps can be replaced by "loop until good".)
#
self.clients[0].run_command(['systemctl', 'reload', 'httpd'])
time.sleep(3)
# HTTPS request from server to client (should succeed)
self.master.run_command(
['curl', f'https://{self.clients[0].hostname}'])
# clean-up
self.clients[0].run_command(['rm', '-rf', '/etc/httpd/md'])
self.clients[0].run_command(['rm', '-f', '/etc/httpd/conf.d/md.conf'])
######################
# Disable ACME service
######################
def test_disable_acme_service(self):
"""
Disable ACME service again, and observe that it no longer services
requests.
"""
self.master.run_command(['ipa-acme-manage', 'disable'])
# wait a short time for Dogtag ACME service to observe config
# change and reconfigure itself to no longer service requests
time.sleep(3)
# should fail now
self.clients[0].run_command(
['curl', '--fail', self.acme_server],
ok_returncode=22,
)
def test_centralize_acme_disable(self):
"""Test if ACME disable on replica if disabled on master"""
status = check_acme_status(self.replicas[0], 'disabled')
assert status == 'disabled'
@server_install_teardown
def test_third_party_certs(self):
"""Require ipa-ca SAN on replacement web certificates"""
self.master.run_command(['ipa-acme-manage', 'enable'])
self.create_pkcs12('ca1/server')
self.prepare_cacert('ca1')
# Re-install the existing Apache certificate that has a SAN to
# verify that it will be accepted.
pin = self.master.get_file_contents(
paths.HTTPD_PASSWD_FILE_FMT.format(host=self.master.hostname)
)
result = self.certinstall(
certfile=paths.HTTPD_CERT_FILE,
keyfile=paths.HTTPD_KEY_FILE,
pin=pin
)
assert result.returncode == 0
# Install using a 3rd party cert with a missing SAN for ipa-ca
# which should be rejected.
result = self.certinstall()
assert result.returncode == 1
self.master.run_command(['ipa-acme-manage', 'disable'])
# Install using a 3rd party cert with a missing SAN for ipa-ca
# which should be ok since ACME is disabled.
result = self.certinstall()
assert result.returncode == 0
# Enable ACME which should fail since the Apache cert lacks the SAN
result = self.master.run_command(['ipa-acme-manage', 'enable'],
raiseonerr=False)
assert result.returncode == 1
assert "invalid 'certificate'" in result.stderr_text
class TestACMECALess(IntegrationTest):
"""Test to check the CA less replica setup"""
num_replicas = 1
num_clients = 0
@pytest.fixture
def test_setup_teardown(self):
tasks.install_master(self.master, setup_dns=True)
tasks.install_replica(self.master, self.replicas[0], setup_ca=False)
yield
tasks.uninstall_replica(self.master, self.replicas[0])
tasks.uninstall_master(self.master)
def test_caless_to_cafull_replica(self, test_setup_teardown):
"""Test ACME is enabled on CA-less replica when converted to CA-full
Deployment where one server is deployed as CA-less, when converted
to CA full, should have ACME enabled by default.
related: https://pagure.io/freeipa/issue/8524
"""
tasks.kinit_admin(self.master)
# enable acme on master
self.master.run_command(['ipa-acme-manage', 'enable'])
# check status of acme server on master
status = check_acme_status(self.master, 'enabled')
assert status == 'enabled'
tasks.kinit_admin(self.replicas[0])
# check status of acme on replica, result: CA is not installed
result = self.replicas[0].run_command(['ipa-acme-manage', 'status'],
raiseonerr=False)
assert result.returncode == 3
# Install CA on replica
tasks.install_ca(self.replicas[0])
# check acme status, should be enabled now
status = check_acme_status(self.replicas[0], 'enabled')
assert status == 'enabled'
# disable acme on replica
self.replicas[0].run_command(['ipa-acme-manage', 'disable'])
# check acme status on master, should be disabled
status = check_acme_status(self.master, 'disabled')
assert status == 'disabled'
def test_enable_caless_to_cafull_replica(self, test_setup_teardown):
"""Test ACME with CA-less replica when converted to CA-full
Deployment have one ca-less replica and ACME is not enabled.
After converting ca-less replica to ca-full, ACME can be
enabled or disabled.
related: https://pagure.io/freeipa/issue/8524
"""
tasks.kinit_admin(self.master)
# check status of acme server on master
status = check_acme_status(self.master, 'disabled')
assert status == 'disabled'
tasks.kinit_admin(self.replicas[0])
# check status of acme on replica, result: CA is not installed
result = self.replicas[0].run_command(['ipa-acme-manage', 'status'],
raiseonerr=False)
assert result.returncode == 3
# Install CA on replica
tasks.install_ca(self.replicas[0])
# check acme status on replica, should not throw error
status = check_acme_status(self.replicas[0], 'disabled')
assert status == 'disabled'
# enable acme on replica
self.replicas[0].run_command(['ipa-acme-manage', 'enable'])
# check acme status on master
status = check_acme_status(self.master, 'enabled')
assert status == 'enabled'
# check acme status on replica
status = check_acme_status(self.replicas[0], 'enabled')
assert status == 'enabled'
# disable acme on master
self.master.run_command(['ipa-acme-manage', 'disable'])
# check acme status on replica, should be disabled
status = check_acme_status(self.replicas[0], 'disabled')
assert status == 'disabled'
class TestACMEwithExternalCA(TestACME):
"""Test the FreeIPA ACME service with external CA"""
num_replicas = 1
num_clients = 1
@classmethod
def install(cls, mh):
super(TestACMEwithExternalCA, cls).install(mh)
# install master with external-ca
result = install_server_external_ca_step1(cls.master)
assert result.returncode == 0
root_ca_fname, ipa_ca_fname = tasks.sign_ca_and_transport(
cls.master, paths.ROOT_IPA_CSR, ROOT_CA, IPA_CA
)
install_server_external_ca_step2(
cls.master, ipa_ca_fname, root_ca_fname
)
tasks.kinit_admin(cls.master)
tasks.install_client(cls.master, cls.clients[0])
tasks.install_replica(cls.master, cls.replicas[0])
class TestACMERenew(IntegrationTest):
num_clients = 1
@classmethod
def install(cls, mh):
# install packages before client install in case of IPA DNS problems
cls.acme_server = prepare_acme_client(cls.master, cls.clients[0])
tasks.install_master(cls.master, setup_dns=True)
tasks.install_client(cls.master, cls.clients[0])
@pytest.fixture
def issue_and_expire_cert(self):
"""Fixture to expire cert by moving date past expiry of acme cert"""
# enable the ACME service on master
self.master.run_command(['ipa-acme-manage', 'enable'])
# register the account with certbot
certbot_register(self.clients[0], self.acme_server)
# request a standalone acme cert
certbot_standalone_cert(self.clients[0], self.acme_server)
# move system date to expire acme cert
for host in self.clients[0], self.master:
tasks.kdestroy_all(host)
tasks.move_date(host, 'stop', '+90days')
tasks.get_kdcinfo(host)
# Note raiseonerr=False:
# the assert is located after kdcinfo retrieval.
result = host.run_command(
"KRB5_TRACE=/dev/stdout kinit admin",
stdin_text='{0}\n{0}\n{0}\n'.format(
self.clients[0].config.admin_password
),
raiseonerr=False
)
# Retrieve kdc.$REALM after the password change, just in case SSSD
# domain status flipped to online during the password change.
tasks.get_kdcinfo(host)
assert result.returncode == 0
yield
# move back date
for host in self.clients[0], self.master:
tasks.kdestroy_all(host)
tasks.move_date(host, 'start', '-90days')
tasks.kinit_admin(host)
@pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
def test_renew(self, issue_and_expire_cert):
"""Test if ACME renews the issued cert with cerbot
This test is to check if ACME certificate renews upon
reaching expiry
related: https://pagure.io/freeipa/issue/4751
"""
data = self.clients[0].get_file_contents(
f'/etc/letsencrypt/live/{self.clients[0].hostname}/cert.pem'
)
cert = x509.load_pem_x509_certificate(data, backend=default_backend())
initial_expiry = cert.not_valid_after
self.clients[0].run_command(['certbot', 'renew'])
data = self.clients[0].get_file_contents(
f'/etc/letsencrypt/live/{self.clients[0].hostname}/cert.pem'
)
cert = x509.load_pem_x509_certificate(data, backend=default_backend())
renewed_expiry = cert.not_valid_after
assert initial_expiry != renewed_expiry
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