Initial commit

exploit/backup.py

@@ -0,0 +1,185 @@
+from dataclasses import dataclass
+from datetime import datetime
+import plistlib
+from pathlib import Path
+from base64 import b64decode
+from hashlib import sha1
+from . import mbdb
+from .mbdb import _FileMode
+from random import randbytes
+from typing import Optional
+
+# RWX:RX:RX
+DEFAULT = _FileMode.S_IRUSR | _FileMode.S_IWUSR | _FileMode.S_IXUSR | _FileMode.S_IRGRP | _FileMode.S_IXGRP | _FileMode.S_IROTH | _FileMode.S_IXOTH
+
+@dataclass
+class BackupFile:
+    path: str
+    domain: str
+
+    def to_record(self) -> mbdb.MbdbRecord:
+        raise NotImplementedError()
+
+@dataclass
+class ConcreteFile(BackupFile):
+    contents: bytes
+    owner: int = 0
+    group: int = 0
+    inode: Optional[int] = None
+    mode: _FileMode = DEFAULT
+
+    def to_record(self) -> mbdb.MbdbRecord:
+        if self.inode is None:
+            self.inode = int.from_bytes(randbytes(8), "big")
+        return mbdb.MbdbRecord(
+            domain=self.domain,
+            filename=self.path,
+            link="",
+            hash=sha1(self.contents).digest(),
+            key=b"",
+            mode=self.mode | _FileMode.S_IFREG,
+            #unknown2=0,
+            #unknown3=0,
+            inode=self.inode,
+            user_id=self.owner,
+            group_id=self.group,
+            mtime=int(datetime.now().timestamp()),
+            atime=int(datetime.now().timestamp()),
+            ctime=int(datetime.now().timestamp()),
+            size=len(self.contents),
+            flags=4,
+            properties=[]
+        )
+
+@dataclass
+class Directory(BackupFile):
+    owner: int = 0
+    group: int = 0
+    mode: _FileMode = DEFAULT
+
+    def to_record(self) -> mbdb.MbdbRecord:
+        return mbdb.MbdbRecord(
+            domain=self.domain,
+            filename=self.path,
+            link="",
+            hash=b"",
+            key=b"",
+            mode=self.mode | _FileMode.S_IFDIR,
+            #unknown2=0,
+            #unknown3=0,
+            inode=0, # inode is not respected for directories
+            user_id=self.owner,
+            group_id=self.group,
+            mtime=int(datetime.now().timestamp()),
+            atime=int(datetime.now().timestamp()),
+            ctime=int(datetime.now().timestamp()),
+            size=0,
+            flags=4,
+            properties=[]
+        )
+    
+@dataclass
+class SymbolicLink(BackupFile):
+    target: str
+    owner: int = 0
+    group: int = 0
+    inode: Optional[int] = None
+    mode: _FileMode = DEFAULT
+
+    def to_record(self) -> mbdb.MbdbRecord:
+        if self.inode is None:
+            self.inode = int.from_bytes(randbytes(8), "big")
+        return mbdb.MbdbRecord(
+            domain=self.domain,
+            filename=self.path,
+            link=self.target,
+            hash=b"",
+            key=b"",
+            mode=self.mode | _FileMode.S_IFLNK,
+            #unknown2=0,
+            #unknown3=0,
+            inode=self.inode,
+            user_id=self.owner,
+            group_id=self.group,
+            mtime=int(datetime.now().timestamp()),
+            atime=int(datetime.now().timestamp()),
+            ctime=int(datetime.now().timestamp()),
+            size=0,
+            flags=4,
+            properties=[]
+        )
+
+@dataclass
+class Backup:
+    files: list[BackupFile]
+
+    def write_to_directory(self, directory: Path):
+        for file in self.files:
+            if isinstance(file, ConcreteFile):
+                #print("Writing", file.path, "to", directory / sha1((file.domain + "-" + file.path).encode()).digest().hex())
+                with open(directory / sha1((file.domain + "-" + file.path).encode()).digest().hex(), "wb") as f:
+                    f.write(file.contents)
+            
+        with open(directory / "Manifest.mbdb", "wb") as f:
+            f.write(self.generate_manifest_db().to_bytes())
+
+        with open(directory / "Status.plist", "wb") as f:
+            f.write(self.generate_status())
+        
+        with open(directory / "Manifest.plist", "wb") as f:
+            f.write(self.generate_manifest())
+
+        with open(directory / "Info.plist", "wb") as f:
+            f.write(plistlib.dumps({}))
+        
+
+    def generate_manifest_db(self): # Manifest.mbdb
+        records = []
+        for file in self.files:
+            records.append(file.to_record())
+        return mbdb.Mbdb(records=records)
+    
+    def generate_status(self) -> bytes: # Status.plist
+        return plistlib.dumps({
+            "BackupState": "new",
+            "Date": datetime.fromisoformat("1970-01-01T00:00:00+00:00"),
+            "IsFullBackup": False,
+            "SnapshotState": "finished",
+            "UUID": "00000000-0000-0000-0000-000000000000",
+            "Version": "2.4"
+        })
+    
+    def generate_manifest(self) -> bytes: # Manifest.plist
+        return plistlib.dumps({
+            "BackupKeyBag": b64decode("""
+    VkVSUwAAAAQAAAAFVFlQRQAAAAQAAAABVVVJRAAAABDud41d1b9NBICR1BH9JfVtSE1D
+	SwAAACgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAV1JBUAAA
+	AAQAAAAAU0FMVAAAABRY5Ne2bthGQ5rf4O3gikep1e6tZUlURVIAAAAEAAAnEFVVSUQA
+	AAAQB7R8awiGR9aba1UuVahGPENMQVMAAAAEAAAAAVdSQVAAAAAEAAAAAktUWVAAAAAE
+	AAAAAFdQS1kAAAAoN3kQAJloFg+ukEUY+v5P+dhc/Welw/oucsyS40UBh67ZHef5ZMk9
+	UVVVSUQAAAAQgd0cg0hSTgaxR3PVUbcEkUNMQVMAAAAEAAAAAldSQVAAAAAEAAAAAktU
+	WVAAAAAEAAAAAFdQS1kAAAAoMiQTXx0SJlyrGJzdKZQ+SfL124w+2Tf/3d1R2i9yNj9z
+	ZCHNJhnorVVVSUQAAAAQf7JFQiBOS12JDD7qwKNTSkNMQVMAAAAEAAAAA1dSQVAAAAAE
+	AAAAAktUWVAAAAAEAAAAAFdQS1kAAAAoSEelorROJA46ZUdwDHhMKiRguQyqHukotrxh
+	jIfqiZ5ESBXX9txi51VVSUQAAAAQfF0G/837QLq01xH9+66vx0NMQVMAAAAEAAAABFdS
+	QVAAAAAEAAAAAktUWVAAAAAEAAAAAFdQS1kAAAAol0BvFhd5bu4Hr75XqzNf4g0fMqZA
+	ie6OxI+x/pgm6Y95XW17N+ZIDVVVSUQAAAAQimkT2dp1QeadMu1KhJKNTUNMQVMAAAAE
+	AAAABVdSQVAAAAAEAAAAA0tUWVAAAAAEAAAAAFdQS1kAAAAo2N2DZarQ6GPoWRgTiy/t
+	djKArOqTaH0tPSG9KLbIjGTOcLodhx23xFVVSUQAAAAQQV37JVZHQFiKpoNiGmT6+ENM
+	QVMAAAAEAAAABldSQVAAAAAEAAAAA0tUWVAAAAAEAAAAAFdQS1kAAAAofe2QSvDC2cV7
+	Etk4fSBbgqDx5ne/z1VHwmJ6NdVrTyWi80Sy869DM1VVSUQAAAAQFzkdH+VgSOmTj3yE
+	cfWmMUNMQVMAAAAEAAAAB1dSQVAAAAAEAAAAA0tUWVAAAAAEAAAAAFdQS1kAAAAo7kLY
+	PQ/DnHBERGpaz37eyntIX/XzovsS0mpHW3SoHvrb9RBgOB+WblVVSUQAAAAQEBpgKOz9
+	Tni8F9kmSXd0sENMQVMAAAAEAAAACFdSQVAAAAAEAAAAA0tUWVAAAAAEAAAAAFdQS1kA
+	AAAo5mxVoyNFgPMzphYhm1VG8Fhsin/xX+r6mCd9gByF5SxeolAIT/ICF1VVSUQAAAAQ
+	rfKB2uPSQtWh82yx6w4BoUNMQVMAAAAEAAAACVdSQVAAAAAEAAAAA0tUWVAAAAAEAAAA
+	AFdQS1kAAAAo5iayZBwcRa1c1MMx7vh6lOYux3oDI/bdxFCW1WHCQR/Ub1MOv+QaYFVV
+	SUQAAAAQiLXvK3qvQza/mea5inss/0NMQVMAAAAEAAAACldSQVAAAAAEAAAAA0tUWVAA
+	AAAEAAAAAFdQS1kAAAAoD2wHX7KriEe1E31z7SQ7/+AVymcpARMYnQgegtZD0Mq2U55u
+	xwNr2FVVSUQAAAAQ/Q9feZxLS++qSe/a4emRRENMQVMAAAAEAAAAC1dSQVAAAAAEAAAA
+	A0tUWVAAAAAEAAAAAFdQS1kAAAAocYda2jyYzzSKggRPw/qgh6QPESlkZedgDUKpTr4Z
+	Z8FDgd7YoALY1g=="""),
+            "Lockdown": {},
+            "SystemDomainsVersion": "20.0",
+            "Version": "9.1"
+        })