mirror of
https://github.com/Sneed-Group/pypush-plus-plus
synced 2024-12-23 19:32:29 -06:00
229 lines
6.4 KiB
Python
229 lines
6.4 KiB
Python
import gzip
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import json
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import logging
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import plistlib
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import threading
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import time
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from base64 import b64decode, b64encode
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from getpass import getpass
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from cryptography.hazmat.primitives import hashes, serialization
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from cryptography.hazmat.primitives.asymmetric import padding, rsa
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from cryptography.hazmat.primitives.serialization import load_pem_private_key
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from rich.logging import RichHandler
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import apns
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import ids
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from ids.keydec import IdentityKeys
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logging.basicConfig(
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level=logging.NOTSET, format="%(message)s", datefmt="[%X]", handlers=[RichHandler()]
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)
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# Set sane log levels
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logging.getLogger("urllib3").setLevel(logging.WARNING)
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logging.getLogger("jelly").setLevel(logging.INFO)
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logging.getLogger("nac").setLevel(logging.INFO)
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logging.getLogger("apns").setLevel(logging.INFO)
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logging.getLogger("albert").setLevel(logging.INFO)
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logging.getLogger("ids").setLevel(logging.DEBUG)
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logging.getLogger("bags").setLevel(logging.DEBUG)
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# Try and load config.json
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try:
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with open("config.json", "r") as f:
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CONFIG = json.load(f)
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except FileNotFoundError:
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CONFIG = {}
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conn = apns.APNSConnection(
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CONFIG.get("push", {}).get("key"), CONFIG.get("push", {}).get("cert")
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)
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def safe_b64decode(s):
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try:
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return b64decode(s)
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except:
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return None
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conn.connect(token=safe_b64decode(CONFIG.get("push", {}).get("token")))
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conn.set_state(1)
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conn.filter(["com.apple.madrid"])
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user = ids.IDSUser(conn)
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if CONFIG.get("auth", {}).get("cert") is not None:
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auth_keypair = ids._helpers.KeyPair(CONFIG["auth"]["key"], CONFIG["auth"]["cert"])
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user_id = CONFIG["auth"]["user_id"]
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handles = CONFIG["auth"]["handles"]
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user.restore_authentication(auth_keypair, user_id, handles)
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else:
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username = input("Username: ")
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password = getpass("Password: ")
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user.authenticate(username, password)
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user.ec_key = CONFIG.get("encryption", {}).get("ec_key")
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user.rsa_key = CONFIG.get("encryption", {}).get("rsa_key")
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if (
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CONFIG.get("id", {}).get("cert") is not None
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and user.ec_key is not None
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and user.rsa_key is not None
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):
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id_keypair = ids._helpers.KeyPair(CONFIG["id"]["key"], CONFIG["id"]["cert"])
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user.restore_identity(id_keypair)
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else:
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logging.info("Registering new identity...")
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import emulated.nac
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vd = emulated.nac.generate_validation_data()
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vd = b64encode(vd).decode()
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user.register(vd)
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logging.info("Waiting for incoming messages...")
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# Create a thread to send keepalive messages
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def keepalive():
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while True:
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time.sleep(5)
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conn.keep_alive()
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threading.Thread(target=keepalive, daemon=True).start()
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# Write config.json
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CONFIG["encryption"] = {
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"ec_key": user.ec_key,
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"rsa_key": user.rsa_key,
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}
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CONFIG["id"] = {
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"key": user._id_keypair.key,
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"cert": user._id_keypair.cert,
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}
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CONFIG["auth"] = {
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"key": user._auth_keypair.key,
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"cert": user._auth_keypair.cert,
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"user_id": user.user_id,
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"handles": user.handles,
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}
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CONFIG["push"] = {
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"token": b64encode(user.push_connection.token).decode(),
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"key": user.push_connection.private_key,
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"cert": user.push_connection.cert,
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}
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with open("config.json", "w") as f:
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json.dump(CONFIG, f, indent=4)
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user_rsa_key = load_pem_private_key(user.rsa_key.encode(), password=None)
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NORMAL_NONCE = b"\x00" * 15 + b"\x01"
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def decrypt(payload, sender_token, rsa_key: rsa.RSAPrivateKey = user_rsa_key):
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"""
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iMessage payload format:
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0x00 - ?
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0x01-0x02 - length of payload
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0x03-0xA0 - RSA encrypted payload portion
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0x00-0x0F - AES key
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0x0F-0x?? - AES encrypted payload portion
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0xA1-0xlength of payload+3 - AES encrypted payload portion
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0xlength of payload+3 - length of signature
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0xLEN+4-0xLEN+4+length of signature - signature
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"""
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from io import BytesIO
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payload = BytesIO(payload)
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tag = payload.read(1)
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length = int.from_bytes(payload.read(2), "big")
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body = payload.read(length)
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body_io = BytesIO(body)
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rsa_body = rsa_key.decrypt(
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body_io.read(160),
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padding.OAEP(
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mgf=padding.MGF1(algorithm=hashes.SHA1()),
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algorithm=hashes.SHA1(),
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label=None,
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),
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)
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cipher = Cipher(algorithms.AES(rsa_body[:16]), modes.CTR(NORMAL_NONCE))
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decrypted = cipher.decryptor().update(rsa_body[16:] + body_io.read())
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# Try to gzip decompress the payload
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try:
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decrypted = gzip.decompress(decrypted)
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except:
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logging.debug("Failed to decompress payload")
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pass
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decrypted = plistlib.loads(decrypted)
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signature_len = payload.read(1)[0]
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signature = payload.read(signature_len)
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#logging.info(f"Signature: {signature}")
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#logging.info(f"Decrypted: {decrypted}")
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# Verify the signature
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sender = decrypted["p"][-1]
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# Lookup the public key for the sender
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lookup = user.lookup([sender])[sender]
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#logging.debug(f"Lookup: {lookup}")
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sender = None
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for identity in lookup['identities']:
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if identity['push-token'] == sender_token:
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sender = identity
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break
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if sender is None:
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logging.error(f"Failed to find identity for {sender_token}")
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identity_keys = sender['client-data']['public-message-identity-key']
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identity_keys = IdentityKeys.decode(identity_keys)
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sender_ec_key = identity_keys.ecdsa_key
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from cryptography.hazmat.primitives.asymmetric import ec
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#logging.debug(f"Verifying signature {signature} with key {sender_ec_key.public_numbers()} and data {body}")
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# Verify the signature (will throw an exception if it fails)
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sender_ec_key.verify(
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signature,
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body,
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ec.ECDSA(hashes.SHA1()),
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)
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return decrypted
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while True:
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def check_response(x):
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if x[0] != 0x0A:
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return False
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resp_body = apns._get_field(x[1], 3)
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if resp_body is None:
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return False
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resp_body = plistlib.loads(resp_body)
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if "P" not in resp_body:
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return False
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return True
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payload = conn.incoming_queue.wait_pop_find(check_response)
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resp_body = apns._get_field(payload[1], 3)
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id = apns._get_field(payload[1], 4)
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conn._send_ack(id)
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resp_body = plistlib.loads(resp_body)
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# logging.info(f"Got response: {resp_body}")
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logging.debug(f"Got message: {resp_body}")
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token = resp_body['t']
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payload = resp_body["P"]
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payload = decrypt(payload, token)
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logging.info(f"Got message: {payload['t']} from {payload['p'][1]}")
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