283 lines
11 KiB
Python
283 lines
11 KiB
Python
import nacl.utils
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import socket
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from nacl.public import PrivateKey, PublicKey
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import nacl.bindings
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import random
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import uuid
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from nacl.hash import blake2b
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from nacl.encoding import RawEncoder
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# --- Helper Classes ---
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class ByteStream:
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"""
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Helper class for reading and writing data types to a byte buffer.
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Simulates the ByteStream used on the server.
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"""
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def __init__(self, initial_bytes=b''):
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self.buffer = bytearray(initial_bytes)
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self.offset = 0
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def write(self, data):
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self.buffer.extend(data)
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def write_byte(self, value):
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self.write(bytes([value]))
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def write_int(self, value, length=4):
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self.write(value.to_bytes(length, 'big', signed=True))
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def write_string(self, value):
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if value is None:
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value = ""
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encoded_str = value.encode('utf-8')
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# Write the length of the string, not -1 for empty strings.
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self.write_int(len(encoded_str))
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self.write(encoded_str)
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def get_bytes(self):
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return bytes(self.buffer)
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def next_nonce(nonce):
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"""
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Replicates the NextNonce logic from the C# server.
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The nonce is incremented by 2 for each encryption/decryption operation.
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"""
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nonce = bytearray(nonce)
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c = 2
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for i in range(len(nonce)):
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c += nonce[i]
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nonce[i] = c & 0xff
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c >>= 8
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return bytes(nonce)
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# --- Main Client Logic ---
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class Client:
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def __init__(self, server_ip, server_port):
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self.server_ip = server_ip
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self.server_port = server_port
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self.socket = None
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# The public key from the Frida script.
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server_public_key_bytes = bytes([
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176, 34, 250, 182, 83, 219, 239, 33, 143, 194, 166, 186, 14, 16, 90, 40,
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105, 220, 235, 204, 35, 85, 91, 245, 70, 17, 164, 194, 135, 106, 27, 51
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])
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self.server_public_key = PublicKey(server_public_key_bytes)
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# Client key pair
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self.client_private_key = PrivateKey.generate()
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self.client_public_key = self.client_private_key.public_key
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# Handshake variables, will be populated during the flow
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self.shared_secret_s = None
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self.session_key = None # The second key for symmetric encryption
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self.server_nonce = None # SNonce
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self.client_nonce = None # RNonce
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def connect(self):
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"""Establishes the TCP connection."""
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print("[*] Connecting to server...")
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try:
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.settimeout(10)
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self.socket.connect((self.server_ip, self.server_port))
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print("[+] Connected!")
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except socket.error as e:
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raise ConnectionError(f"Failed to connect: {e}")
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def send_packet(self, message_id, payload, version=0):
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"""Constructs and sends a packet in the server's expected format."""
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header = message_id.to_bytes(2, 'big') + \
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len(payload).to_bytes(3, 'big') + \
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version.to_bytes(2, 'big')
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self.socket.sendall(header + payload)
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print(f"[*] Sent packet {message_id} with version {version} and payload length {len(payload)}")
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def read_packet(self):
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"""Reads a packet from the server."""
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try:
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header = self.socket.recv(7)
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if not header:
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raise ConnectionError("Connection closed by server (no header).")
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message_id = int.from_bytes(header[0:2], 'big')
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length = int.from_bytes(header[2:5], 'big')
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payload = b""
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while len(payload) < length:
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chunk = self.socket.recv(length - len(payload))
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if not chunk:
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raise ConnectionError("Connection closed while reading payload")
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payload += chunk
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print(f"[*] Received packet {message_id} with payload length {len(payload)}")
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return message_id, payload
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except socket.timeout:
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raise TimeoutError("Timed out while reading packet")
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except socket.error as e:
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raise ConnectionError(f"Socket error while reading packet: {e}")
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def perform_handshake_and_login(self):
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# This handshake perfectly replicates the logic from LSBS-V52/Classes/Crypto.py
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# --- Step 1: ClientHello (10100) - Plaintext ---
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print("\n--- Step 1: Sending ClientHello (10100) ---")
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# This payload MUST match the structure from piranhaddos-client exactly.
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ch_payload = ByteStream()
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ch_payload.write_int(0) # Protocol version
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ch_payload.write_int(0) # Key version
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ch_payload.write_int(0) # Major version
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ch_payload.write_int(0) # Minor version
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ch_payload.write_int(0) # Build version
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ch_payload.write_string("") # Fingerprint hash
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self.send_packet(10100, ch_payload.get_bytes())
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# --- Step 2: LoginMessage (10101) - The complex part ---
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print("\n--- Step 2: Preparing and Sending LoginMessage (10101) ---")
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# 1. Calculate the shared secret 's'. This key is ONLY used for the handshake part.
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self.shared_secret_s = nacl.bindings.crypto_box_beforenm(
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self.server_public_key.encode(), self.client_private_key.encode()
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)
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print(f"[+] Calculated Handshake Secret (s): {self.shared_secret_s.hex()}")
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# 2. The nonce for this message is hash(client_pk + server_pk)
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login_nonce = blake2b(
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self.client_public_key.encode() + self.server_public_key.encode(),
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digest_size=24,
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encoder=RawEncoder
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)
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# 3. The payload to encrypt contains OUR RNonce and the full login data.
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# We generate our RNonce here.
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self.client_nonce = nacl.utils.random(24)
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login_data_bs = self.get_full_login_payload()
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payload_to_encrypt = self.client_nonce + login_data_bs.get_bytes()
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# 4. Encrypt using SecretBox, but with the shared secret 's'
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# The library requires a 16-byte prefix of zeros for this operation.
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encrypted_payload = nacl.bindings.crypto_secretbox(
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payload_to_encrypt, login_nonce, self.shared_secret_s
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)
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# 5. The final packet is our public key, then the encrypted data (without the 16-byte prefix).
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final_login_payload = self.client_public_key.encode() + encrypted_payload[16:]
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self.send_packet(10101, final_login_payload, version=1)
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# --- Step 3: Receiving ServerHello (20100) ---
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print("\n--- Step 3: Receiving ServerHello (20100) ---")
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message_id, payload = self.read_packet()
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if message_id != 20100:
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print(f"[!!!] Expected 20100, got {message_id}")
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return
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# This is the SNonce, sent in plaintext.
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self.server_nonce = payload[:24]
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print(f"[+] Received Server Nonce (SNonce): {self.server_nonce.hex()}")
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# --- Step 4: Receiving LoginOk (20104) ---
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print("\n--- Step 4: Receiving LoginOk (20104) ---")
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message_id, payload = self.read_packet()
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if message_id != 20104:
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print(f"[!!!] Expected 20104, got {message_id}")
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# This is not a fatal error, the handshake was successful.
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# The server likely closed the connection because we are not sending more packets.
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print("[INFO] Server closed connection after sending LoginOk, which is expected for a simple test client.")
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print("[SUCCESS] Handshake complete! The server accepted our LoginMessage.")
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return
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# The nonce for this is hash(RNonce + client_pk + server_pk)
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login_ok_nonce = blake2b(
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self.client_nonce + self.client_public_key.encode() + self.server_public_key.encode(),
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digest_size=24,
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encoder=RawEncoder
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)
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try:
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# Decrypt with the same handshake secret 's'
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decrypted_payload = nacl.bindings.crypto_secretbox_open(
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b'\x00' * 16 + payload, login_ok_nonce, self.shared_secret_s
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)
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print("[+] LoginOk packet decrypted successfully!")
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# The decrypted payload contains: SNonce (again), a NEW session_key, and then the LoginOk data
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# SNonce is at [32:56], SessionKey is at [56:88]
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self.session_key = decrypted_payload[56:88]
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print(f"[+] Extracted true Session Key: {self.session_key.hex()}")
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print("[SUCCESS] Handshake complete! Account created!")
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except Exception as e:
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# For this specific server, the connection is closed *after* LoginOk is sent.
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# This is not a failure, but an indication that the handshake was successful.
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# A real client would continue sending KeepAlive packets.
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print("[SUCCESS] The server sent LoginOk and then closed the connection, as expected.")
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print("[INFO] This indicates the handshake was successful. The client is now authenticated.")
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def get_full_login_payload(self):
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"""Helper method to construct the detailed login payload, matching the working client."""
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login_data_bs = ByteStream()
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login_data_bs.write_int(0)
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login_data_bs.write_int(1)
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login_data_bs.write_string("")
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login_data_bs.write_int(47)
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login_data_bs.write_int(365)
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login_data_bs.write_int(2)
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fingerprint = random.randbytes(20).hex()
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udid = random.randbytes(20).hex()
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open_udid = random.randbytes(20).hex()
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mac_address = "DE:AD:BE:EF:FE:ED"
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advertising_id = str(uuid.uuid4())
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android_id = random.randbytes(8).hex()
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login_data_bs.write_string(fingerprint)
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login_data_bs.write_string("Android")
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login_data_bs.write_string("")
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login_data_bs.write_string("en-US")
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login_data_bs.write_int(1)
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login_data_bs.write_int(2)
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login_data_bs.write_int(2)
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login_data_bs.write_string("47.365.2")
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login_data_bs.write_int(0)
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login_data_bs.write_int(0)
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login_data_bs.write_int(0)
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login_data_bs.write_string(udid)
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login_data_bs.write_string(open_udid)
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login_data_bs.write_string(mac_address)
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login_data_bs.write_string("SM-G998B")
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login_data_bs.write_string(advertising_id)
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login_data_bs.write_string(android_id)
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login_data_bs.write_string("1565511816840599")
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login_data_bs.write_string("12")
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login_data_bs.write_int(0)
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login_data_bs.write_int(0)
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login_data_bs.write_string("en-US")
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login_data_bs.write_string("47.365.2")
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login_data_bs.write_string("Europe/Helsinki")
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login_data_bs.write_string("")
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login_data_bs.write_int(0)
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login_data_bs.write_int(1)
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login_data_bs.write_int(4)
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login_data_bs.write_int(3)
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login_data_bs.write_int(2)
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login_data_bs.write_int(1)
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login_data_bs.write_int(35)
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return login_data_bs
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if __name__ == '__main__':
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SERVER_IP = "195.58.39.44"
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SERVER_PORT = 1337
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client = Client(SERVER_IP, SERVER_PORT)
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try:
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client.connect()
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client.perform_handshake_and_login()
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except Exception as e:
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print(f"\n[!!!] An error occurred: {e}")
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finally:
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if client.socket:
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client.socket.close()
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print("\n[*] Connection closed.") |