tests: Test cases for X.509 certificate checking
This makes it easier to test various X.509 certificate validation steps with the server certificate being generated and signed using pyOpenSSL dynamically. Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
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Jouni Malinen
Jouni Malinen
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1 changed files with 312 additions and 0 deletions
312
tests/hwsim/test_cert_check.py
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312
tests/hwsim/test_cert_check.py
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# Test cases for X.509 certificate checking
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# Copyright (c) 2019, The Linux Foundation
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#
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# This software may be distributed under the terms of the BSD license.
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# See README for more details.
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import os
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try:
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import OpenSSL
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openssl_imported = True
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except ImportError:
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openssl_imported = False
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from utils import HwsimSkip
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import hostapd
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from test_ap_eap import check_domain_suffix_match, check_altsubject_match_support, check_domain_match
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def check_cert_check_support():
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if not openssl_imported:
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raise HwsimSkip("OpenSSL python method not available")
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def start_hapd(apdev, server_cert="auth_serv/server.pem"):
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params = {"ssid": "cert-check", "wpa": "2", "wpa_key_mgmt": "WPA-EAP",
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"rsn_pairwise": "CCMP", "ieee8021x": "1",
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"eap_server": "1", "eap_user_file": "auth_serv/eap_user.conf",
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"ca_cert": "auth_serv/ca.pem",
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"server_cert": server_cert,
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"private_key": "auth_serv/server.key",
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"dh_file": "auth_serv/dh.conf"}
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hapd = hostapd.add_ap(apdev, params)
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return hapd
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def load_certs():
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with open("auth_serv/ca.pem", "rb") as f:
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res = f.read()
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cacert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM,
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res)
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with open("auth_serv/ca-key.pem", "rb") as f:
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res = f.read()
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cakey = OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, res)
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with open("auth_serv/server.pem", "rb") as f:
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res = f.read()
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servercert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, res)
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return cacert, cakey, servercert
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def start_cert(servercert, cacert, cn='server.w1.fi', v3=True):
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cert = OpenSSL.crypto.X509()
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cert.set_serial_number(12345)
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cert.gmtime_adj_notBefore(-10)
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cert.gmtime_adj_notAfter(1000)
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cert.set_pubkey(servercert.get_pubkey())
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dn = cert.get_subject()
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dn.CN = cn
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cert.set_subject(dn)
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if v3:
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cert.set_version(2)
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cert.add_extensions([
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OpenSSL.crypto.X509Extension(b"basicConstraints", True,
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b"CA:FALSE"),
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OpenSSL.crypto.X509Extension(b"subjectKeyIdentifier", False,
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b"hash", subject=cert),
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OpenSSL.crypto.X509Extension(b"authorityKeyIdentifier", False,
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b"keyid:always", issuer=cacert),
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])
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return cert
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def sign_cert(cert, cert_file, cakey, cacert):
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cert.set_issuer(cacert.get_subject())
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cert.sign(cakey, "sha256")
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with open(cert_file, 'wb') as f:
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f.write(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM,
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cert))
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def check_connect(dev, fail=False, wait_error=None, **kwargs):
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dev.connect("cert-check", key_mgmt="WPA-EAP", eap="TTLS",
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identity="pap user", anonymous_identity="ttls",
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password="password",
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ca_cert="auth_serv/ca.pem", phase2="auth=PAP",
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scan_freq="2412", wait_connect=False, **kwargs)
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ev = dev.wait_event(["CTRL-EVENT-EAP-STARTED"], timeout=10)
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if ev is None:
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raise Exception("EAP not started")
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if fail:
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if wait_error:
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ev = dev.wait_event([wait_error], timeout=5)
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if ev is None:
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raise Exception("Specific error not reported")
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ev = dev.wait_event(["CTRL-EVENT-EAP-FAILURE"], timeout=5)
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if ev is None:
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raise Exception("EAP failure not reported")
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else:
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dev.wait_connected()
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dev.request("REMOVE_NETWORK all")
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dev.request("ABORT_SCAN")
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dev.wait_disconnected()
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dev.dump_monitor()
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def test_cert_check_basic(dev, apdev, params):
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"""Basic test with generated X.509 server certificate"""
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check_cert_check_support()
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cert_file = os.path.join(params['logdir'], "cert_check_basic.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert, v3=False)
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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check_connect(dev[0])
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def test_cert_check_v3(dev, apdev, params):
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"""Basic test with generated X.509v3 server certificate"""
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check_cert_check_support()
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cert_file = os.path.join(params['logdir'], "cert_check_v3.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert)
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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check_connect(dev[0])
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def test_cert_check_dnsname(dev, apdev, params):
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"""Certificate check with multiple dNSName values"""
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check_cert_check_support()
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check_domain_suffix_match(dev[0])
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check_domain_match(dev[0])
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cert_file = os.path.join(params['logdir'], "cert_check_dnsname.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert, cn="server")
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dns = ["DNS:one.example.com", "DNS:two.example.com",
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"DNS:three.example.com"]
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cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
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",".join(dns).encode())])
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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check_connect(dev[0])
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tests = ["two.example.com",
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"one.example.com",
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"tWo.Example.com",
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"three.example.com",
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"no.match.example.com;two.example.com;no.match.example.org",
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"no.match.example.com;example.com;no.match.example.org",
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"no.match.example.com;no.match.example.org;example.com",
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"example.com",
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"com"]
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for match in tests:
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check_connect(dev[0], domain_suffix_match=match)
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tests = ["four.example.com",
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"foo.one.example.com",
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"no.match.example.org;no.match.example.com",
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"xample.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_suffix_match=match)
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tests = ["one.example.com",
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"two.example.com",
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"three.example.com",
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"no.match.example.com;two.example.com;no.match.example.org",
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"tWo.Example.Com"]
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for match in tests:
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check_connect(dev[0], domain_match=match)
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tests = ["four.example.com",
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"foo.one.example.com",
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"example.com",
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"xample.com",
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"no.match.example.org;no.match.example.com",
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"ne.example.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_match=match)
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def test_cert_check_dnsname_wildcard(dev, apdev, params):
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"""Certificate check with multiple dNSName wildcard values"""
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check_cert_check_support()
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check_domain_suffix_match(dev[0])
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check_domain_match(dev[0])
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cert_file = os.path.join(params['logdir'], "cert_check_dnsname.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert, cn="server")
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dns = ["DNS:*.one.example.com", "DNS:two.example.com",
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"DNS:*.three.example.com"]
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cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
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",".join(dns).encode())])
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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check_connect(dev[0])
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tests = ["two.example.com",
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"one.example.com",
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"tWo.Example.com",
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"three.example.com",
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"no.match.example.com;two.example.com;no.match.example.org",
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"no.match.example.com;example.com;no.match.example.org",
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"no.match.example.com;no.match.example.org;example.com",
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"example.com",
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"com"]
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for match in tests:
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check_connect(dev[0], domain_suffix_match=match)
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tests = ["four.example.com",
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"foo.one.example.com",
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"no.match.example.org;no.match.example.com",
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"xample.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_suffix_match=match)
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tests = ["*.one.example.com",
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"two.example.com",
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"*.three.example.com",
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"no.match.example.com;two.example.com;no.match.example.org",
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"tWo.Example.Com"]
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for match in tests:
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check_connect(dev[0], domain_match=match)
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tests = ["four.example.com",
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"foo.one.example.com",
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"example.com",
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"xample.com",
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"no.match.example.org;no.match.example.com",
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"one.example.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_match=match)
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def test_cert_check_dnsname_alt(dev, apdev, params):
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"""Certificate check with multiple dNSName values using altsubject_match"""
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check_cert_check_support()
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check_altsubject_match_support(dev[0])
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cert_file = os.path.join(params['logdir'], "cert_check_dnsname_alt.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert, cn="server")
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dns = ["DNS:*.one.example.com", "DNS:two.example.com",
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"DNS:*.three.example.com"]
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cert.add_extensions([OpenSSL.crypto.X509Extension(b"subjectAltName", False,
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",".join(dns).encode())])
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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tests = ["DNS:*.one.example.com",
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"DNS:two.example.com",
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"DNS:*.three.example.com",
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"DNS:*.three.example.com;DNS:two.example.com;DNS:*.one.example.com",
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"DNS:foo.example.org;DNS:two.example.com;DNS:bar.example.org"]
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for alt in tests:
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check_connect(dev[0], altsubject_match=alt)
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tests = ["DNS:one.example.com",
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"DNS:four.example.com;DNS:five.example.com"]
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for alt in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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altsubject_match=alt)
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def test_cert_check_dnsname_cn(dev, apdev, params):
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"""Certificate check with dNSName in CN"""
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check_cert_check_support()
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check_domain_suffix_match(dev[0])
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check_domain_match(dev[0])
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cert_file = os.path.join(params['logdir'], "cert_check_dnsname_cn.pem")
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cacert, cakey, servercert = load_certs()
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cert = start_cert(servercert, cacert, cn="server.example.com")
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sign_cert(cert, cert_file, cakey, cacert)
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hapd = start_hapd(apdev[0], server_cert=cert_file)
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check_connect(dev[0])
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tests = ["server.example.com",
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"example.com",
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"eXample.Com",
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"no.match.example.com;example.com;no.match.example.org",
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"no.match.example.com;server.example.com;no.match.example.org",
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"com"]
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for match in tests:
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check_connect(dev[0], domain_suffix_match=match)
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tests = ["aaa.example.com",
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"foo.server.example.com",
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"no.match.example.org;no.match.example.com",
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"xample.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_suffix_match=match)
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tests = ["server.example.com",
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"no.match.example.com;server.example.com;no.match.example.org",
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"sErver.Example.Com"]
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for match in tests:
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check_connect(dev[0], domain_match=match)
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tests = ["aaa.example.com",
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"foo.server.example.com",
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"example.com",
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"no.match.example.org;no.match.example.com",
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"xample.com"]
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for match in tests:
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check_connect(dev[0], fail=True,
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wait_error="CTRL-EVENT-EAP-TLS-CERT-ERROR",
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domain_match=match)
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