import plistlib from base64 import b64decode import requests from ._helpers import PROTOCOL_VERSION, USER_AGENT, KeyPair, parse_key, serialize_key from .signing import add_auth_signature, armour_cert from io import BytesIO from cryptography.hazmat.primitives.asymmetric import ec, rsa import logging logger = logging.getLogger("ids") class IDSIdentity: def __init__(self, signing_key: str | None = None, encryption_key: str | None = None, signing_public_key: str | None = None, encryption_public_key: str | None = None): if signing_key is not None: self.signing_key = signing_key self.signing_public_key = serialize_key(parse_key(signing_key).public_key())# type: ignore elif signing_public_key is not None: self.signing_key = None self.signing_public_key = signing_public_key else: # Generate a new key self.signing_key = serialize_key(ec.generate_private_key(ec.SECP256R1())) self.signing_public_key = serialize_key(parse_key(self.signing_key).public_key())# type: ignore if encryption_key is not None: self.encryption_key = encryption_key self.encryption_public_key = serialize_key(parse_key(encryption_key).public_key())# type: ignore elif encryption_public_key is not None: self.encryption_key = None self.encryption_public_key = encryption_public_key else: self.encryption_key = serialize_key(rsa.generate_private_key(65537, 1280)) self.encryption_public_key = serialize_key(parse_key(self.encryption_key).public_key())# type: ignore @staticmethod def decode(inp: bytes) -> 'IDSIdentity': input = BytesIO(inp) assert input.read(5) == b'\x30\x81\xF6\x81\x43' # DER header raw_ecdsa = input.read(67) assert input.read(3) == b'\x82\x81\xAE' # DER header raw_rsa = input.read(174) # Parse the RSA key raw_rsa = BytesIO(raw_rsa) assert raw_rsa.read(2) == b'\x00\xAC' # Not sure what this is assert raw_rsa.read(3) == b'\x30\x81\xA9' # Inner DER header assert raw_rsa.read(3) == b'\x02\x81\xA1' rsa_modulus = raw_rsa.read(161) rsa_modulus = int.from_bytes(rsa_modulus, "big") assert raw_rsa.read(5) == b'\x02\x03\x01\x00\x01' # Exponent, should always be 65537 # Parse the EC key assert raw_ecdsa[:3] == b'\x00\x41\x04' raw_ecdsa = raw_ecdsa[3:] ec_x = int.from_bytes(raw_ecdsa[:32], "big") ec_y = int.from_bytes(raw_ecdsa[32:], "big") ec_key = ec.EllipticCurvePublicNumbers(ec_x, ec_y, ec.SECP256R1()) ec_key = ec_key.public_key() rsa_key = rsa.RSAPublicNumbers(e=65537, n=rsa_modulus) rsa_key = rsa_key.public_key() return IDSIdentity(signing_public_key=serialize_key(ec_key), encryption_public_key=serialize_key(rsa_key)) def encode(self) -> bytes: output = BytesIO() raw_rsa = BytesIO() raw_rsa.write(b'\x00\xAC') raw_rsa.write(b'\x30\x81\xA9') raw_rsa.write(b'\x02\x81\xA1') raw_rsa.write(parse_key(self.encryption_public_key).public_numbers().n.to_bytes(161, "big")) # type: ignore raw_rsa.write(b'\x02\x03\x01\x00\x01') # Hardcode the exponent output.write(b'\x30\x81\xF6\x81\x43') output.write(b'\x00\x41\x04') output.write(parse_key(self.signing_public_key).public_numbers().x.to_bytes(32, "big"))# type: ignore output.write(parse_key(self.signing_public_key).public_numbers().y.to_bytes(32, "big"))# type: ignore output.write(b'\x82\x81\xAE') output.write(raw_rsa.getvalue()) return output.getvalue() import apns from . import _helpers import uuid from base64 import b64encode def register( push_connection: apns.APNSConnection, signing_users: list[tuple[str, _helpers.KeyPair]], user_payloads: list[dict], validation_data, device_id: uuid.UUID ): body = { # TODO: Abstract this out "device-name": "pypush", "hardware-version": "iPhone13,2", "language": "en-US", "os-version": "iPhone13,3_16.6,20G75", "software-version": "20G75", "private-device-data": { "u": str(device_id), }, "services": [ { "capabilities": [{"flags": 1, "name": "Messenger", "version": 1}], "service": "com.apple.madrid", "sub-services": ["com.apple.private.alloy.sms", "com.apple.private.alloy.gelato", "com.apple.private.alloy.biz", "com.apple.private.alloy.gamecenter.imessage"], "users": user_payloads, } ], "validation-data": b64decode(validation_data), } logger.debug(f"Sending IDS registration request: {body}") body = plistlib.dumps(body) # Construct headers headers = { "x-protocol-version": PROTOCOL_VERSION, } for i, (user_id, keypair) in enumerate(signing_users): headers[f"x-auth-user-id-{i}"] = user_id add_auth_signature(headers, body, "id-register", keypair, _helpers.get_key_pair(push_connection.credentials), b64encode(push_connection.credentials.token).decode(), i) logger.debug(f"Headers: {headers}") r = requests.post( "https://identity.ess.apple.com/WebObjects/TDIdentityService.woa/wa/register", headers=headers, data=body, verify=False, ) r = plistlib.loads(r.content) logger.debug(f"Received response to IDS registration: {r}") if "status" in r and r["status"] == 6004: raise Exception("Validation data expired!") # TODO: Do validation of nested statuses if "status" in r and r["status"] != 0: raise Exception(f"Failed to register: {r}") if not "services" in r: raise Exception(f"No services in response: {r}") if not "users" in r["services"][0]: raise Exception(f"No users in response: {r}") output = {} for user in r["services"][0]["users"]: if not "cert" in user: raise Exception(f"No cert in response: {r}") for uri in user["uris"]: if uri["status"] != 0: raise Exception(f"Failed to register URI {uri['uri']}: {r}") output[user["user-id"]] = armour_cert(user["cert"]) return output