From 3ffeb7d8c896a2280ebaf43d7f9afdc462f14d35 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Tue, 9 Apr 2019 13:22:57 +0300 Subject: [PATCH] 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 --- tests/hwsim/test_cert_check.py | 312 +++++++++++++++++++++++++++++++++ 1 file changed, 312 insertions(+) create mode 100644 tests/hwsim/test_cert_check.py diff --git a/tests/hwsim/test_cert_check.py b/tests/hwsim/test_cert_check.py new file mode 100644 index 000000000..191a1d1aa --- /dev/null +++ b/tests/hwsim/test_cert_check.py @@ -0,0 +1,312 @@ +# 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)