# 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)