tests: Add PASN tests with comeback flow

Signed-off-by: Ilan Peer <ilan.peer@intel.com>

tests/hwsim/test_pasn.py

@@ -13,6 +13,7 @@ logger = logging.getLogger()
 import socket
 import struct
 import subprocess
+import re
 
 import hwsim_utils
 import hostapd
@@ -681,3 +682,124 @@ def test_pasn_ap_mic_error(dev, apdev):
 
     check_pasn_akmp_cipher(dev[0], hapd1, "PASN", "CCMP", status=1)
     check_pasn_akmp_cipher(dev[0], hapd0, "PASN", "CCMP")
+
+@remote_compatible
+def test_pasn_comeback(dev, apdev, params):
+    """PASN authentication with comeback flow"""
+    check_pasn_capab(dev[0])
+
+    params = pasn_ap_params("PASN", "CCMP", "19")
+    params['sae_anti_clogging_threshold'] = '0'
+    hapd = hostapd.add_ap(apdev[0], params)
+    bssid = hapd.own_addr()
+
+    dev[0].scan(type="ONLY", freq=2412)
+    cmd = "PASN_START bssid=%s akmp=PASN cipher=CCMP group=19" % bssid
+
+    resp = dev[0].request(cmd)
+    if "OK" not in resp:
+        raise Exception("Failed to start PASN authentication")
+
+    ev = dev[0].wait_event(["PASN-AUTH-STATUS"], 3)
+    if not ev:
+        raise Exception("PASN: PASN-AUTH-STATUS not seen")
+
+    if bssid + " akmp=PASN, status=30 comeback_after=" not in ev:
+        raise Exception("PASN: unexpected status")
+
+    comeback = re.split("comeback=", ev)[1]
+
+    cmd = "PASN_START bssid=%s akmp=PASN cipher=CCMP group=19 comeback=%s" % \
+            (bssid, comeback)
+
+    resp = dev[0].request(cmd)
+    if "OK" not in resp:
+        raise Exception("Failed to start PASN authentication")
+
+    ev = dev[0].wait_event(["PASN-AUTH-STATUS"], 3)
+    if not ev:
+        raise Exception("PASN: PASN-AUTH-STATUS not seen")
+
+    if bssid + " akmp=PASN, status=0" not in ev:
+        raise Exception("PASN: unexpected status with comeback token")
+
+    check_pasn_ptk(dev[0], hapd, "CCMP")
+
+@remote_compatible
+def test_pasn_comeback_after_0(dev, apdev, params):
+    """PASN authentication with comeback flow with comeback after set to 0"""
+    check_pasn_capab(dev[0])
+
+    params = pasn_ap_params("PASN", "CCMP", "19")
+    params['anti_clogging_threshold'] = '0'
+    params['pasn_comeback_after'] = '0'
+    hapd = start_pasn_ap(apdev[0], params)
+
+    check_pasn_akmp_cipher(dev[0], hapd, "PASN", "CCMP")
+
+@remote_compatible
+def test_pasn_comeback_after_0_sae(dev, apdev):
+    """PASN authentication with SAE, with comeback flow where comeback after is set to 0"""
+    check_pasn_capab(dev[0])
+    check_sae_capab(dev[0])
+
+    params = hostapd.wpa2_params(ssid="test-pasn-sae",
+                                 passphrase="12345678")
+    params['wpa_key_mgmt'] = 'SAE PASN'
+    params['anti_clogging_threshold'] = '0'
+    params['pasn_comeback_after'] = '0'
+    hapd = start_pasn_ap(apdev[0], params)
+
+    dev[0].connect("test-sae", psk="12345678", key_mgmt="SAE", scan_freq="2412",
+                   only_add_network=True)
+
+    # first test with a valid PSK
+    check_pasn_akmp_cipher(dev[0], hapd, "SAE", "CCMP", nid="0")
+
+    # And now with PMKSA caching
+    check_pasn_akmp_cipher(dev[0], hapd, "SAE", "CCMP")
+
+    # And now with a wrong passphrase
+    if "FAIL" in dev[0].request("PMKSA_FLUSH"):
+        raise Exception("PMKSA_FLUSH failed")
+
+    dev[0].set_network_quoted(0, "psk", "12345678787")
+    check_pasn_akmp_cipher(dev[0], hapd, "SAE", "CCMP", status=1, nid="0")
+
+@remote_compatible
+def test_pasn_comeback_multi(dev, apdev):
+    """PASN authentication with SAE, with multiple stations with comeback"""
+    check_pasn_capab(dev[0])
+    check_sae_capab(dev[0])
+
+    params = hostapd.wpa2_params(ssid="test-pasn-sae",
+                                 passphrase="12345678")
+    params['wpa_key_mgmt'] = 'SAE PASN'
+    params['anti_clogging_threshold'] = '1'
+    params['pasn_comeback_after'] = '0'
+    hapd = start_pasn_ap(apdev[0], params)
+    bssid = hapd.own_addr()
+
+    id = {}
+    for i in range(0, 2):
+        dev[i].flush_scan_cache()
+        dev[i].scan(type="ONLY", freq=2412)
+        id[i] = dev[i].connect("test-sae", psk="12345678", key_mgmt="SAE",
+                               scan_freq="2412", only_add_network=True)
+
+    for i in range(0, 2):
+        cmd = "PASN_START bssid=%s akmp=PASN cipher=CCMP group=19, nid=%s" % (bssid, id[i])
+        resp = dev[i].request(cmd)
+
+        if "OK" not in resp:
+            raise Exception("Failed to start pasn authentication")
+
+    for i in range(0, 2):
+        ev = dev[i].wait_event(["PASN-AUTH-STATUS"], 3)
+        if not ev:
+            raise Exception("PASN: PASN-AUTH-STATUS not seen")
+
+        if bssid + " akmp=PASN, status=0" not in ev:
+            raise Exception("PASN: unexpected status")
+
+        check_pasn_ptk(dev[i], hapd, "CCMP")