mirror of
https://github.com/Sneed-Group/pypush-plus-plus
synced 2024-12-25 04:12:34 -06:00
782 lines
24 KiB
Python
782 lines
24 KiB
Python
# LOW LEVEL imessage function, decryption etc
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# Don't handle APNS etc, accept it already setup
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## HAVE ANOTHER FILE TO SETUP EVERYTHING AUTOMATICALLY, etc
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# JSON parsing of keys, don't pass around strs??
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import base64
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import gzip
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import logging
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import plistlib
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import random
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import uuid
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from dataclasses import dataclass, field
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from hashlib import sha1, sha256
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from io import BytesIO
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.asymmetric import ec, padding
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from xml.etree import ElementTree
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import apns
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import ids
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logger = logging.getLogger("imessage")
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NORMAL_NONCE = b"\x00" * 15 + b"\x01" # This is always used as the AES nonce
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class BalloonBody:
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"""Represents the special parts of message extensions etc."""
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def __init__(self, type: str, data: bytes):
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self.type = type
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self.data = data
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# TODO : Register handlers based on type id
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class AttachmentFile:
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def data(self) -> bytes:
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raise NotImplementedError()
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@dataclass
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class MMCSFile(AttachmentFile):
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url: str | None = None
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size: int | None = None
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owner: str | None = None
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signature: bytes | None = None
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decryption_key: bytes | None = None
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def data(self) -> bytes:
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import requests
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logger.info(
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requests.get(
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url=self.url,
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headers={
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"User-Agent": f"IMTransferAgent/900 CFNetwork/596.2.3 Darwin/12.2.0 (x86_64) (Macmini5,1)",
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# "MMCS-Url": self.url,
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# "MMCS-Signature": str(base64.encodebytes(self.signature)),
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# "MMCS-Owner": self.owner
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},
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).headers
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)
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return b""
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@dataclass
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class InlineFile(AttachmentFile):
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_data: bytes
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def data(self) -> bytes:
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return self._data
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@dataclass
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class Attachment:
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name: str
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mime_type: str
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versions: list[AttachmentFile]
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def __init__(self, message_raw_content: dict, xml_element: ElementTree.Element):
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attrib = xml_element.attrib
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self.name = attrib["name"] if "name" in attrib else None
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self.mime_type = attrib["mime-type"] if "mime-type" in attrib else None
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if "inline-attachment" in attrib:
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# just grab the inline attachment !
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self.versions = [
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InlineFile(message_raw_content[attrib["inline-attachment"]])
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]
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else:
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# suffer
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versions = [InlineFile(b"")]
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print(attrib)
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# for attribute in attrs:
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# if attribute.startswith("mmcs") or \
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# attribute.startswith("decryption-key") or \
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# attribute.startswith("file-size"):
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# segments = attribute.split('-')
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# if segments[-1].isnumeric():
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# index = int(segments[-1])
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# attribute_name = segments[:-1]
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# else:
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# index = 0
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# attribute_name = attribute
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# while index >= len(versions):
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# versions.append(MMCSFile())
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# val = attrs[attribute_name]
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# match attribute_name:
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# case "mmcs-url":
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# versions[index].url = val
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# case "mmcs-owner":
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# versions[index].owner = val
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# case "mmcs-signature-hex":
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# versions[index].signature = base64.b16decode(val)
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# case "file-size":
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# versions[index].size = int(val)
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# case "decryption-key":
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# versions[index].decryption_key = base64.b16decode(val)[1:]
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self.versions = versions
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def __repr__(self):
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return f'<Attachment name="{self.name}" type="{self.mime_type}">'
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@dataclass
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class Message:
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text: str
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sender: str
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participants: list[str]
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id: uuid.UUID
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_raw: dict
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_compressed: bool = True
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xml: str | None = None
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def from_raw(message: bytes, sender: str | None = None) -> "Message":
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"""Create a `Message` from raw message bytes"""
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raise NotImplementedError()
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def __str__():
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raise NotImplementedError()
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@dataclass
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class SMSReflectedMessage(Message):
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def from_raw(message: bytes, sender: str | None = None) -> "SMSReflectedMessage":
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"""Create a `SMSIncomingMessage` from raw message bytes"""
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# Decompress the message
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try:
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message = gzip.decompress(message)
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compressed = True
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except:
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compressed = False
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message = plistlib.loads(message)
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logger.debug(f"Decoding SMSReflectedMessage: {message}")
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return SMSReflectedMessage(
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text=message["mD"]["plain-body"],
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sender=sender,
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participants=[re["id"] for re in message["re"]] + [sender],
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id=uuid.UUID(message["mD"]["guid"]),
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_raw=message,
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_compressed=compressed,
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)
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def __str__(self):
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return f"[SMS {self.sender}] '{self.text}'"
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@dataclass
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class SMSIncomingMessage(Message):
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def from_raw(message: bytes, sender: str | None = None) -> "SMSIncomingMessage":
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"""Create a `SMSIncomingMessage` from raw message bytes"""
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# Decompress the message
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try:
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message = gzip.decompress(message)
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compressed = True
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except:
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compressed = False
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message = plistlib.loads(message)
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logger.debug(f"Decoding SMSIncomingMessage: {message}")
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return SMSIncomingMessage(
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text=message["k"][0]["data"].decode(),
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sender=message["h"], # Don't use sender parameter, that is the phone that forwarded the message
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participants=[message["h"], message["co"]],
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id=uuid.UUID(message["g"]),
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_raw=message,
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_compressed=compressed,
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)
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def __str__(self):
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return f"[SMS {self.sender}] '{self.text}'"
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@dataclass
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class SMSIncomingImage(Message):
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def from_raw(message: bytes, sender: str | None = None) -> "SMSIncomingImage":
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"""Create a `SMSIncomingImage` from raw message bytes"""
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# TODO: Implement this
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return "SMSIncomingImage"
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@dataclass
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class iMessage(Message):
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effect: str | None = None
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def from_raw(message: bytes, sender: str | None = None) -> "iMessage":
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"""Create a `iMessage` from raw message bytes"""
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# Decompress the message
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try:
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message = gzip.decompress(message)
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compressed = True
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except:
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compressed = False
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message = plistlib.loads(message)
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logger.debug(f"Decoding iMessage: {message}")
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return iMessage(
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text=message["t"],
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participants=message["p"],
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sender=sender,
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id=uuid.UUID(message["r"]),
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xml=message["x"] if "x" in message else None,
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_raw=message,
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_compressed=compressed,
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effect=message["iid"] if "iid" in message else None,
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)
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def __str__(self):
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return f"[iMessage {self.sender}] '{self.text}'"
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@dataclass
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class OldiMessage:
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"""Represents an iMessage"""
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text: str = ""
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"""Plain text of message, always required, may be an empty string"""
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xml: str | None = None
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"""XML portion of message, may be None"""
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participants: list[str] = field(default_factory=list)
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"""List of participants in the message, including the sender"""
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sender: str | None = None
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"""Sender of the message"""
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id: uuid.UUID | None = None
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"""ID of the message, will be randomly generated if not provided"""
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group_id: uuid.UUID | None = None
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"""Group ID of the message, will be randomly generated if not provided"""
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body: BalloonBody | None = None
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"""BalloonBody, may be None"""
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effect: str | None = None
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"""iMessage effect sent with this message, may be None"""
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_compressed: bool = True
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"""Internal property representing whether the message should be compressed"""
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_raw: dict | None = None
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"""Internal property representing the original raw message, may be None"""
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def attachments(self) -> list[Attachment]:
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if self.xml is not None:
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return [
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Attachment(self._raw, elem)
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for elem in ElementTree.fromstring(self.xml)[0]
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if elem.tag == "FILE"
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]
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else:
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return []
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def sanity_check(self):
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"""Corrects any missing fields"""
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if self.id is None:
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self.id = uuid.uuid4()
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if self.group_id is None:
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self.group_id = uuid.uuid4()
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if self.sender is None:
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if len(self.participants) > 1:
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self.sender = self.participants[-1]
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else:
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logger.warning(
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"Message has no sender, and only one participant, sanity check failed"
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)
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return False
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if self.sender not in self.participants:
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self.participants.append(self.sender)
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if self.xml != None:
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self._compressed = False # XML is never compressed for some reason
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return True
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def from_raw(message: bytes, sender: str | None = None) -> "OldiMessage":
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"""Create an `iMessage` from raw message bytes"""
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compressed = False
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try:
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message = gzip.decompress(message)
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compressed = True
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except:
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pass
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message = plistlib.loads(message)
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logger.debug(f"Decompressed message : {message}")
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try:
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return OldiMessage(
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text=message[
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"t"
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], # Cause it to "fail to parse" if there isn't any good text to display, temp hack
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xml=message.get("x"),
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participants=message.get("p", []),
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sender=sender
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if sender is not None
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else message.get("p", [])[-1]
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if "p" in message
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else None,
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id=uuid.UUID(message.get("r")) if "r" in message else None,
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group_id=uuid.UUID(message.get("gid")) if "gid" in message else None,
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body=BalloonBody(message["bid"], message["b"])
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if "bid" in message and "b" in message
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else None,
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effect=message["iid"] if "iid" in message else None,
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_compressed=compressed,
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_raw=message,
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)
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except:
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#import json
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dmp = str(message)
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return OldiMessage(text=f"failed to parse: {dmp}", _raw=message)
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def to_raw(self) -> bytes:
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"""Convert an `iMessage` to raw message bytes"""
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if not self.sanity_check():
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raise ValueError("Message failed sanity check")
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d = {
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"t": self.text,
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"x": self.xml,
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"p": self.participants,
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"r": str(self.id).upper(),
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"gid": str(self.group_id).upper(),
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"pv": 0,
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"gv": "8",
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"v": "1",
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"iid": self.effect,
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}
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# Remove keys that are None
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d = {k: v for k, v in d.items() if v is not None}
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# Serialize as a plist
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d = plistlib.dumps(d, fmt=plistlib.FMT_BINARY)
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# Compression
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if self._compressed:
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d = gzip.compress(d, mtime=0)
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return d
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def to_string(self) -> str:
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message_str = f"[{self.sender}] '{self.text}'"
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if self.effect is not None:
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message_str += f" with effect [{self.effect}]"
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return message_str
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class iMessageUser:
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"""Represents a logged in and connected iMessage user.
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This abstraction should probably be reworked into IDS some time..."""
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def __init__(self, connection: apns.APNSConnection, user: ids.IDSUser):
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self.connection = connection
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self.user = user
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def _parse_payload(payload: bytes) -> tuple[bytes, bytes]:
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payload = BytesIO(payload)
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tag = payload.read(1)
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# print("TAG", tag)
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body_length = int.from_bytes(payload.read(2), "big")
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body = payload.read(body_length)
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signature_len = payload.read(1)[0]
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signature = payload.read(signature_len)
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return (body, signature)
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def _construct_payload(body: bytes, signature: bytes) -> bytes:
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payload = (
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b"\x02"
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+ len(body).to_bytes(2, "big")
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+ body
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+ len(signature).to_bytes(1, "big")
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+ signature
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)
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return payload
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def _hash_identity(id: bytes) -> bytes:
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iden = ids.identity.IDSIdentity.decode(id)
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# TODO: Combine this with serialization code in ids.identity
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output = BytesIO()
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output.write(b"\x00\x41\x04")
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output.write(
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ids._helpers.parse_key(iden.signing_public_key)
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.public_numbers()
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.x.to_bytes(32, "big")
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)
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output.write(
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ids._helpers.parse_key(iden.signing_public_key)
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.public_numbers()
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.y.to_bytes(32, "big")
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)
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output.write(b"\x00\xAC")
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output.write(b"\x30\x81\xA9")
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output.write(b"\x02\x81\xA1")
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output.write(
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ids._helpers.parse_key(iden.encryption_public_key)
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.public_numbers()
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.n.to_bytes(161, "big")
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)
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output.write(b"\x02\x03\x01\x00\x01")
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return sha256(output.getvalue()).digest()
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def _encrypt_sign_payload(
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self, key: ids.identity.IDSIdentity, message: bytes
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) -> bytes:
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# Generate a random AES key
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random_seed = random.randbytes(11)
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# Create the HMAC
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import hmac
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hm = hmac.new(
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random_seed,
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message
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+ b"\x02"
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+ iMessageUser._hash_identity(self.user.encryption_identity.encode())
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+ iMessageUser._hash_identity(key.encode()),
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sha256,
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).digest()
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aes_key = random_seed + hm[:5]
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# print(len(aes_key))
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# Encrypt the message with the AES key
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cipher = Cipher(algorithms.AES(aes_key), modes.CTR(NORMAL_NONCE))
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encrypted = cipher.encryptor().update(message)
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# Encrypt the AES key with the public key of the recipient
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recipient_key = ids._helpers.parse_key(key.encryption_public_key)
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rsa_body = recipient_key.encrypt(
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aes_key + encrypted[:100],
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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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# Construct the payload
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body = rsa_body + encrypted[100:]
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sig = ids._helpers.parse_key(self.user.encryption_identity.signing_key).sign(
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body, ec.ECDSA(hashes.SHA1())
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)
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payload = iMessageUser._construct_payload(body, sig)
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return payload
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def _decrypt_payload(self, payload: bytes) -> dict:
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payload = iMessageUser._parse_payload(payload)
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body = BytesIO(payload[0])
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rsa_body = ids._helpers.parse_key(
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self.user.encryption_identity.encryption_key
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).decrypt(
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body.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.read())
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return decrypted
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def _verify_payload(self, payload: bytes, sender: str, sender_token: str) -> bool:
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# Get the public key for the sender
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self._cache_keys([sender], "com.apple.madrid")
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if not sender_token in self.KEY_CACHE:
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logger.warning("Unable to find the public key of the sender, cannot verify")
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return False
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identity_keys = ids.identity.IDSIdentity.decode(
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self.KEY_CACHE[sender_token]["com.apple.madrid"][0]
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)
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sender_ec_key = ids._helpers.parse_key(identity_keys.signing_public_key)
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payload = iMessageUser._parse_payload(payload)
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try:
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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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payload[1],
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payload[0],
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ec.ECDSA(hashes.SHA1()),
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)
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return True
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except:
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return False
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def receive(self) -> Message | None:
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"""
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Will return the next iMessage in the queue, or None if there are no messages
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"""
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# Check for iMessages
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body = self._receive_raw(100, "com.apple.madrid")
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t = iMessage
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if body is None:
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# Check for SMS messages
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body = self._receive_raw(143, "com.apple.private.alloy.sms")
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t = SMSReflectedMessage
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if body is None:
|
|
# Check for SMS reflected images
|
|
body = self._receive_raw(144, "com.apple.private.alloy.sms")
|
|
t = SMSReflectedMessage
|
|
if body is None:
|
|
# Check for SMS incoming messages
|
|
body = self._receive_raw(140, "com.apple.private.alloy.sms")
|
|
t = SMSIncomingMessage
|
|
if body is None:
|
|
# Incoming images
|
|
body = self._receive_raw(141, "com.apple.private.alloy.sms")
|
|
t = SMSIncomingImage
|
|
if body is None:
|
|
return None
|
|
|
|
|
|
if not self._verify_payload(body["P"], body["sP"], body["t"]):
|
|
raise Exception("Failed to verify payload")
|
|
|
|
logger.debug(f"Encrypted body : {body}")
|
|
|
|
decrypted = self._decrypt_payload(body["P"])
|
|
|
|
return t.from_raw(decrypted, body["sP"])
|
|
|
|
KEY_CACHE_HANDLE: str = ""
|
|
KEY_CACHE: dict[bytes, dict[str, tuple[bytes, bytes]]] = {}
|
|
"""Mapping of push token : topic : (public key, session token)"""
|
|
USER_CACHE: dict[str, list[bytes]] = {}
|
|
"""Mapping of handle : [push tokens]"""
|
|
|
|
def _cache_keys(self, participants: list[str], topic: str):
|
|
# Clear the cache if the handle has changed
|
|
if self.KEY_CACHE_HANDLE != self.user.current_handle:
|
|
self.KEY_CACHE_HANDLE = self.user.current_handle
|
|
self.KEY_CACHE = {}
|
|
self.USER_CACHE = {}
|
|
|
|
# Check to see if we have cached the keys for all of the participants
|
|
if all([p in self.USER_CACHE for p in participants]):
|
|
return
|
|
|
|
# Look up the public keys for the participants, and cache a token : public key mapping
|
|
lookup = self.user.lookup(participants, topic=topic)
|
|
|
|
logger.debug(f"Lookup response : {lookup}")
|
|
for key, participant in lookup.items():
|
|
if len(participant["identities"]) == 0:
|
|
logger.warning(f"Participant {key} has no identities, this is probably not a real account")
|
|
|
|
for key, participant in lookup.items():
|
|
if not key in self.USER_CACHE:
|
|
self.USER_CACHE[key] = []
|
|
|
|
for identity in participant["identities"]:
|
|
if not "client-data" in identity:
|
|
continue
|
|
if not "public-message-identity-key" in identity["client-data"]:
|
|
continue
|
|
if not "push-token" in identity:
|
|
continue
|
|
if not "session-token" in identity:
|
|
continue
|
|
|
|
self.USER_CACHE[key].append(identity["push-token"])
|
|
|
|
# print(identity)
|
|
|
|
if not identity["push-token"] in self.KEY_CACHE:
|
|
self.KEY_CACHE[identity["push-token"]] = {}
|
|
|
|
self.KEY_CACHE[identity["push-token"]][topic] = (
|
|
identity["client-data"]["public-message-identity-key"],
|
|
identity["session-token"],
|
|
)
|
|
|
|
def _send_raw(
|
|
self,
|
|
type: int,
|
|
participants: list[str],
|
|
topic: str,
|
|
payload: bytes | None = None,
|
|
id: uuid.UUID | None = None,
|
|
extra: dict = {},
|
|
):
|
|
self._cache_keys(participants, topic)
|
|
|
|
dtl = []
|
|
for participant in participants:
|
|
for push_token in self.USER_CACHE[participant]:
|
|
if push_token == self.connection.token:
|
|
continue # Don't send to ourselves
|
|
|
|
identity_keys = ids.identity.IDSIdentity.decode(
|
|
self.KEY_CACHE[push_token][topic][0]
|
|
)
|
|
|
|
p = {
|
|
"tP": participant,
|
|
"D": not participant == self.user.current_handle,
|
|
"sT": self.KEY_CACHE[push_token][topic][1],
|
|
"t": push_token,
|
|
}
|
|
|
|
if payload is not None:
|
|
p["P"] = self._encrypt_sign_payload(identity_keys, payload)
|
|
|
|
logger.debug(f"Encoded payload : {p}")
|
|
|
|
dtl.append(p)
|
|
|
|
message_id = random.randbytes(4)
|
|
|
|
if id is None:
|
|
id = uuid.uuid4()
|
|
|
|
body = {
|
|
"c": type,
|
|
"fcn": 1,
|
|
"v": 8,
|
|
"i": int.from_bytes(message_id, "big"),
|
|
"U": id.bytes,
|
|
"dtl": dtl,
|
|
"sP": self.user.current_handle,
|
|
}
|
|
|
|
body.update(extra)
|
|
|
|
body = plistlib.dumps(body, fmt=plistlib.FMT_BINARY)
|
|
|
|
self.connection.send_message(topic, body, message_id)
|
|
|
|
def _receive_raw(self, c: int | list[int], topic: str | list[str]) -> dict | None:
|
|
def check_response(x):
|
|
if x[0] != 0x0A:
|
|
return False
|
|
# Check if it matches any of the topics
|
|
if isinstance(topic, list):
|
|
for t in topic:
|
|
if apns._get_field(x[1], 2) == sha1(t.encode()).digest():
|
|
break
|
|
else:
|
|
return False
|
|
else:
|
|
if apns._get_field(x[1], 2) != sha1(topic.encode()).digest():
|
|
return False
|
|
|
|
resp_body = apns._get_field(x[1], 3)
|
|
if resp_body is None:
|
|
return False
|
|
resp_body = plistlib.loads(resp_body)
|
|
|
|
#logger.info(f"See type {resp_body['c']}")
|
|
|
|
if isinstance(c, list):
|
|
if not resp_body["c"] in c:
|
|
return False
|
|
elif resp_body["c"] != c:
|
|
return False
|
|
return True
|
|
|
|
payload = self.connection.incoming_queue.pop_find(check_response)
|
|
if payload is None:
|
|
return None
|
|
body = apns._get_field(payload[1], 3)
|
|
body = plistlib.loads(body)
|
|
return body
|
|
|
|
def activate_sms(self) -> bool:
|
|
"""
|
|
Try to activate SMS forwarding
|
|
Returns True if we are able to perform SMS forwarding, False otherwise
|
|
Call repeatedly until it returns True
|
|
"""
|
|
|
|
act_message = self._receive_raw(145, "com.apple.private.alloy.sms")
|
|
if act_message is None:
|
|
return False
|
|
|
|
self._send_raw(
|
|
147,
|
|
[self.user.current_handle],
|
|
"com.apple.private.alloy.sms",
|
|
extra={
|
|
"nr": 1
|
|
}
|
|
)
|
|
|
|
def send(self, message: OldiMessage):
|
|
# Set the sender, if it isn't already
|
|
if message.sender is None:
|
|
message.sender = self.user.handles[0] # TODO : Which handle to use?
|
|
|
|
message.sanity_check() # Sanity check MUST be called before caching keys, so that the sender is added to the list of participants
|
|
self._cache_keys(message.participants, "com.apple.madrid")
|
|
|
|
self._send_raw(
|
|
100,
|
|
message.participants,
|
|
"com.apple.madrid",
|
|
message.to_raw(),
|
|
message.id,
|
|
{
|
|
"E": "pair",
|
|
}
|
|
)
|
|
|
|
# Check for delivery
|
|
count = 0
|
|
total = 0
|
|
|
|
import time
|
|
start = time.time()
|
|
|
|
for p in message.participants:
|
|
for t in self.USER_CACHE[p]:
|
|
if t == self.connection.token:
|
|
continue
|
|
total += 1
|
|
|
|
while count < total and time.time() - start < 2:
|
|
resp = self._receive_raw(255, "com.apple.madrid")
|
|
if resp is None:
|
|
continue
|
|
count += 1
|
|
|
|
logger.debug(f"Received response : {resp}")
|
|
|
|
if resp["s"] != 0:
|
|
logger.warning(f"Message delivery to {base64.b64encode(resp['t']).decode()} failed : {resp['s']}")
|
|
|
|
if count < total:
|
|
logger.error(f"Unable to deliver message to all devices (got {count} of {total})")
|