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# Test cases for X.509 certificate checking
# Copyright (c) 2019, The Linux Foundation
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import os
try:
import OpenSSL
openssl_imported = True
except ImportError:
openssl_imported = False
from utils import HwsimSkip
import hostapd
from test_ap_eap import check_domain_suffix_match, check_altsubject_match_support, check_domain_match
def check_cert_check_support():
if not openssl_imported:
raise HwsimSkip("OpenSSL python method not available")
def start_hapd(apdev, server_cert="auth_serv/server.pem"):
params = {"ssid": "cert-check", "wpa": "2", "wpa_key_mgmt": "WPA-EAP",
"rsn_pairwise": "CCMP", "ieee8021x": "1",
"eap_server": "1", "eap_user_file": "auth_serv/eap_user.conf",
"ca_cert": "auth_serv/ca.pem",
"server_cert": server_cert,
"private_key": "auth_serv/server.key",
"dh_file": "auth_serv/dh.conf"}
hapd = hostapd.add_ap(apdev, params)
return hapd
def load_certs():
with open("auth_serv/ca.pem", "rb") as f:
res = f.read()
cacert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM,
res)
with open("auth_serv/ca-key.pem", "rb") as f:
res = f.read()
cakey = OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, res)
with open("auth_serv/server.pem", "rb") as f:
res = f.read()
servercert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, res)
return cacert, cakey, servercert
def start_cert(servercert, cacert, cn='server.w1.fi', v3=True):
cert = OpenSSL.crypto.X509()
cert.set_serial_number(12345)
cert.gmtime_adj_notBefore(-10)
cert.gmtime_adj_notAfter(1000)
cert.set_pubkey(servercert.get_pubkey())
dn = cert.get_subject()
dn.CN = cn
cert.set_subject(dn)
if v3:
cert.set_version(2)
cert.add_extensions([
OpenSSL.crypto.X509Extension(b"basicConstraints", True,
b"CA:FALSE"),
OpenSSL.crypto.X509Extension(b"subjectKeyIdentifier", False,
b"hash", subject=cert),
OpenSSL.crypto.X509Extension(b"authorityKeyIdentifier", False,
b"keyid:always", issuer=cacert),
])
return cert
def sign_cert(cert, cert_file, cakey, cacert):
cert.set_issuer(cacert.get_subject())
cert.sign(cakey, "sha256")
with open(cert_file, 'wb') as f:
f.write(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM,
cert))
def check_connect(dev, fail=False, wait_error=None, **kwargs):
dev.connect("cert-check", key_mgmt="WPA-EAP", eap="TTLS",
identity="pap user", anonymous_identity="ttls",
password="password",
ca_cert="auth_serv/ca.pem", phase2="auth=PAP",
scan_freq="2412", wait_connect=False, **kwargs)
ev = dev.wait_event(["CTRL-EVENT-EAP-STARTED"], timeout=10)
if ev is None:
raise Exception("EAP not started")
if fail:
if wait_error:
ev = dev.wait_event([wait_error], timeout=5)
if ev is None:
raise Exception("Specific error not reported")
ev = dev.wait_event(["CTRL-EVENT-EAP-FAILURE"], timeout=5)
if ev is None:
raise Exception("EAP failure not reported")
else:
dev.wait_connected()
dev.request("REMOVE_NETWORK all")
dev.request("ABORT_SCAN")
dev.wait_disconnected()
dev.dump_monitor()
def test_cert_check_basic(dev, apdev, params):
"""Basic test with generated X.509 server certificate"""
check_cert_check_support()
cert_file = os.path.join(params['logdir'], "cert_check_basic.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert, v3=False)
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
check_connect(dev[0])
def test_cert_check_v3(dev, apdev, params):
"""Basic test with generated X.509v3 server certificate"""
check_cert_check_support()
cert_file = os.path.join(params['logdir'], "cert_check_v3.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert)
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
check_connect(dev[0])
def test_cert_check_dnsname(dev, apdev, params):
"""Certificate check with multiple dNSName values"""
check_cert_check_support()
check_domain_suffix_match(dev[0])
check_domain_match(dev[0])
cert_file = os.path.join(params['logdir'], "cert_check_dnsname.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert, cn="server")
dns = ["DNS:one.example.com", "DNS:two.example.com",
"DNS:three.example.com"]
cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
",".join(dns).encode())])
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
check_connect(dev[0])
tests = ["two.example.com",
"one.example.com",
"tWo.Example.com",
"three.example.com",
"no.match.example.com;two.example.com;no.match.example.org",
"no.match.example.com;example.com;no.match.example.org",
"no.match.example.com;no.match.example.org;example.com",
"example.com",
"com"]
for match in tests:
check_connect(dev[0], domain_suffix_match=match)
tests = ["four.example.com",
"foo.one.example.com",
"no.match.example.org;no.match.example.com",
"xample.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_suffix_match=match)
tests = ["one.example.com",
"two.example.com",
"three.example.com",
"no.match.example.com;two.example.com;no.match.example.org",
"tWo.Example.Com"]
for match in tests:
check_connect(dev[0], domain_match=match)
tests = ["four.example.com",
"foo.one.example.com",
"example.com",
"xample.com",
"no.match.example.org;no.match.example.com",
"ne.example.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_match=match)
def test_cert_check_dnsname_wildcard(dev, apdev, params):
"""Certificate check with multiple dNSName wildcard values"""
check_cert_check_support()
check_domain_suffix_match(dev[0])
check_domain_match(dev[0])
cert_file = os.path.join(params['logdir'], "cert_check_dnsname.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert, cn="server")
dns = ["DNS:*.one.example.com", "DNS:two.example.com",
"DNS:*.three.example.com"]
cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
",".join(dns).encode())])
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
check_connect(dev[0])
tests = ["two.example.com",
"one.example.com",
"tWo.Example.com",
"three.example.com",
"no.match.example.com;two.example.com;no.match.example.org",
"no.match.example.com;example.com;no.match.example.org",
"no.match.example.com;no.match.example.org;example.com",
"example.com",
"com"]
for match in tests:
check_connect(dev[0], domain_suffix_match=match)
tests = ["four.example.com",
"foo.one.example.com",
"no.match.example.org;no.match.example.com",
"xample.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_suffix_match=match)
tests = ["*.one.example.com",
"two.example.com",
"*.three.example.com",
"no.match.example.com;two.example.com;no.match.example.org",
"tWo.Example.Com"]
for match in tests:
check_connect(dev[0], domain_match=match)
tests = ["four.example.com",
"foo.one.example.com",
"example.com",
"xample.com",
"no.match.example.org;no.match.example.com",
"one.example.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_match=match)
def test_cert_check_dnsname_alt(dev, apdev, params):
"""Certificate check with multiple dNSName values using altsubject_match"""
check_cert_check_support()
check_altsubject_match_support(dev[0])
cert_file = os.path.join(params['logdir'], "cert_check_dnsname_alt.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert, cn="server")
dns = ["DNS:*.one.example.com", "DNS:two.example.com",
"DNS:*.three.example.com"]
cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
",".join(dns).encode())])
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
tests = ["DNS:*.one.example.com",
"DNS:two.example.com",
"DNS:*.three.example.com",
"DNS:*.three.example.com;DNS:two.example.com;DNS:*.one.example.com",
"DNS:foo.example.org;DNS:two.example.com;DNS:bar.example.org"]
for alt in tests:
check_connect(dev[0], altsubject_match=alt)
tests = ["DNS:one.example.com",
"DNS:four.example.com;DNS:five.example.com"]
for alt in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
altsubject_match=alt)
def test_cert_check_dnsname_cn(dev, apdev, params):
"""Certificate check with dNSName in CN"""
check_cert_check_support()
check_domain_suffix_match(dev[0])
check_domain_match(dev[0])
cert_file = os.path.join(params['logdir'], "cert_check_dnsname_cn.pem")
cacert, cakey, servercert = load_certs()
cert = start_cert(servercert, cacert, cn="server.example.com")
sign_cert(cert, cert_file, cakey, cacert)
hapd = start_hapd(apdev[0], server_cert=cert_file)
check_connect(dev[0])
tests = ["server.example.com",
"example.com",
"eXample.Com",
"no.match.example.com;example.com;no.match.example.org",
"no.match.example.com;server.example.com;no.match.example.org",
"com"]
for match in tests:
check_connect(dev[0], domain_suffix_match=match)
tests = ["aaa.example.com",
"foo.server.example.com",
"no.match.example.org;no.match.example.com",
"xample.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_suffix_match=match)
tests = ["server.example.com",
"no.match.example.com;server.example.com;no.match.example.org",
"sErver.Example.Com"]
for match in tests:
check_connect(dev[0], domain_match=match)
tests = ["aaa.example.com",
"foo.server.example.com",
"example.com",
"no.match.example.org;no.match.example.com",
"xample.com"]
for match in tests:
check_connect(dev[0], fail=True,
wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
domain_match=match)
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