Merge branch 'main' into fix/settings-env-persist

MVTSettings.initialise() constructs the settings once with load_env=False
and writes the result to config.yaml, so that values taken from MVT_*
environment variables are never persisted, then constructs them again
with the environment applied.

Since #716 settings_customise_sources() has added env_settings
unconditionally, making load_env dead code. Any MVT_* variable set for a
single run, including MVT_IOS_BACKUP_PASSWORD, MVT_ANDROID_BACKUP_PASSWORD
and MVT_VT_API_KEY, was written in plaintext to config.yaml and read back
on every later run.

Only add env_settings when load_env is true, and add a regression test.

Fixes #915

.github/workflows/tests.yml

@@ -5,6 +5,10 @@ on:
   pull_request:
     branches: [ main ]
 
+permissions:
+  contents: read
+  pull-requests: write # coverage comment
+
 jobs:
   build:
     name: Run Python Tests
@@ -13,6 +17,10 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+    env:
+      # Takes precedence over .python-version, which otherwise makes `uv run`
+      # rebuild the venv with 3.10 and test every matrix entry on 3.10.
+      UV_PYTHON: ${{ matrix.python-version }}
 
     steps:
       - uses: actions/checkout@v7
@@ -26,16 +34,23 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install Python dependencies
         run: |
-          uv sync --locked --group dev --python ${{ matrix.python-version }}
+          uv sync --locked --group dev
       - name: Test with pytest
         run: |
           set -o pipefail
           make test-ci | tee pytest-coverage.txt
+      - name: Coverage job summary
+        run: uv run coverage report --format=markdown --show-missing --skip-covered >> "$GITHUB_STEP_SUMMARY"
 
       - name: Pytest coverage comment
-        continue-on-error: true # Workflows running on a fork can't post comments
-        uses: MishaKav/pytest-coverage-comment@main
-        if: github.event_name == 'pull_request'
+        # One comment per PR, not one per matrix entry. PRs from forks get a
+        # read-only token and can't post; the job summary above still works.
+        if: github.event_name == 'pull_request' && matrix.python-version == '3.13'
+        continue-on-error: true
+        uses: MishaKav/pytest-coverage-comment@v1.12.2
         with:
           pytest-coverage-path: ./pytest-coverage.txt
           junitxml-path: ./pytest.xml
+          # The full table with per-line links exceeds GitHub's 65536-char comment limit.
+          report-only-changed-files: true
+          remove-links-to-lines: true

pyproject.toml

@@ -24,7 +24,8 @@ dependencies = [
     "simplejson==4.1.1",
     "packaging==26.3",
     "appdirs==1.4.4",
-    "iOSbackup==0.9.925",
+    "iphone_backup_decrypt==0.9.0",
+    "pycryptodome>=3.20.0",
     "adb-shell[usb]==0.4.4",
     "libusb1==3.4.0",
     "cryptography==50.0.0",

src/mvt/android/artifacts/settings.py

@@ -4,6 +4,11 @@
 #   https://license.mvt.re/1.1/
 
 import re
+from datetime import datetime
+from typing import Optional, Sequence
+
+from mvt.common.module_types import ModuleAtomicResult, ModuleSerializedResult
+from mvt.common.utils import convert_datetime_to_iso
 
 from .artifact import AndroidArtifact
 
@@ -60,45 +65,240 @@ ANDROID_DANGEROUS_SETTINGS = [
     },
 ]
 
+# dumpsys prints the fields of a setting record, and of a change history entry,
+# always in this order and separated by a single space. After the value come
+# `default:` and `defaultSystemSet:` when a default is recorded, then `tag:`;
+# some vendor builds add whether the value survives a restore, either as
+# `isValuePreservedInRestore:` or as a bare `notPreservedInRestore` token.
+SETTING_FIELDS = (
+    "_id",
+    "name",
+    "pkg",
+    "value",
+    "default",
+    "defaultSystemSet",
+    "tag",
+    "isValuePreservedInRestore",
+)
+HISTORY_FIELDS = ("time", "mode", "oldValue", "newValue", "package")
+
+NAMESPACE_PATTERN = re.compile(
+    r"^(CONFIG|GLOBAL|SECURE|SYSTEM) SETTINGS \(user (\d+)\)$"
+)
+SECTION_END_PATTERN = re.compile(r"ending at: (\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2})")
+
 
 class Settings(AndroidArtifact):
-    def parse(self, content: str) -> None:
-        self.results: dict[str, dict[str, str]] = {}
-        namespace: str | None = None
-        for line in content.splitlines():
-            heading = re.match(
-                r"^(CONFIG|GLOBAL|SECURE|SYSTEM) SETTINGS \(user (\d+)\)$",
-                line.strip(),
-            )
-            if heading:
-                namespace = f"{heading.group(1).lower()}:user_{heading.group(2)}"
-                self.results[namespace] = {}
+    """Parser for the `dumpsys settings` output.
+
+    Every row of the settings provider becomes one result, keeping the fields
+    dumpsys prints alongside the value: the row id, the package which recorded
+    the setting, the default, the tag, and the change history. A setting name
+    can appear more than once within a namespace, so results are a list rather
+    than a mapping.
+    """
+
+    def serialize(self, result: ModuleAtomicResult) -> ModuleSerializedResult:
+        records = []
+        for entry in result.get("history", []):
+            if not entry.get("timestamp"):
                 continue
-            if namespace is None or not line.startswith("_id:"):
-                continue
-            setting = re.match(
-                r"^_id:\S+\s+name:(.*?)\s+pkg:.*?\s+value:(.*?)"
-                r"(?:\s+default:.*\s+defaultSystemSet:(?:true|false))?$",
-                line,
+
+            records.append(
+                {
+                    "timestamp": entry["timestamp"],
+                    "module": self.__class__.__name__,
+                    "event": "settings_change",
+                    "data": (
+                        f"{result.get('namespace')} setting "
+                        f'"{result.get("name")}" changed from '
+                        f'"{entry.get("oldValue")}" to "{entry.get("newValue")}" '
+                        f"by {entry.get('pkg')}"
+                    ),
+                }
             )
-            if setting:
-                self.results[namespace][setting.group(1)] = setting.group(2)
+
+        return records
 
     def check_indicators(self) -> None:
-        for namespace, settings in self.results.items():
-            for key, value in settings.items():
-                for danger in ANDROID_DANGEROUS_SETTINGS:
-                    # Check if one of the dangerous settings is using an unsafe
-                    # value (different than the one specified).
-                    if danger["key"] == key and danger["safe_value"] != value:
-                        self.alertstore.medium(
-                            f'Found suspicious "{namespace}" setting "{key} = {value}" ({danger["description"]})',
-                            "",
-                            {
-                                "namespace": namespace,
-                                "key": key,
-                                "value": value,
-                                "description": danger["description"],
-                            },
-                        )
-                        break
+        for result in self.results:
+            name = result.get("name")
+            value = result.get("value")
+            for danger in ANDROID_DANGEROUS_SETTINGS:
+                # Check if one of the dangerous settings is using an unsafe
+                # value (different than the one specified).
+                if danger["key"] != name or danger["safe_value"] == value:
+                    continue
+
+                history = result.get("history") or []
+                self.alertstore.medium(
+                    f'Found suspicious "{result.get("namespace")}" setting '
+                    f'"{name} = {value}" ({danger["description"]})',
+                    history[-1]["timestamp"] if history else "",
+                    result,
+                )
+                break
+
+    def parse(self, content: str) -> None:
+        self.results: list[ModuleAtomicResult] = []
+        section_end = self._parse_section_end(content)
+        namespace: Optional[str] = None
+        user: Optional[str] = None
+        record_lines: list[str] = []
+        history_lines: list[str] = []
+        in_history = False
+
+        def flush() -> None:
+            nonlocal record_lines, history_lines, in_history
+            if record_lines:
+                self.results.append(
+                    self._build_record(
+                        namespace, user, record_lines, history_lines, section_end
+                    )
+                )
+            record_lines = []
+            history_lines = []
+            in_history = False
+
+        for line in content.splitlines():
+            heading = NAMESPACE_PATTERN.match(line.strip())
+            if heading:
+                flush()
+                namespace = heading.group(1).lower()
+                user = heading.group(2)
+                continue
+
+            if line.startswith("--------- "):
+                # dumpsys closes every section with a duration trailer.
+                flush()
+                namespace = None
+                continue
+
+            if namespace is None:
+                continue
+
+            if not line.strip():
+                # dumpsys prints a blank line after every namespace block and
+                # after a change history, and other dumps such as the
+                # generation registry follow the last block, so a blank line
+                # closes the record being read.
+                flush()
+                continue
+
+            if line.startswith("_id:"):
+                flush()
+                record_lines = [line]
+                continue
+
+            if not record_lines:
+                continue
+
+            stripped = line.strip()
+            if stripped.startswith("History ("):
+                in_history = True
+                continue
+
+            if in_history:
+                if stripped.startswith("time:"):
+                    history_lines.append(stripped)
+                elif stripped and history_lines:
+                    # A history entry can be wrapped over several lines.
+                    history_lines[-1] += " " + stripped
+                continue
+
+            # Anything else continues the value of the record being read.
+            record_lines.append(line)
+
+        flush()
+
+    @staticmethod
+    def _split_fields(text: str, keys: Sequence[str]) -> dict[str, str]:
+        """Split the `key:value` fields of one record.
+
+        Values are free-form and may contain spaces and newlines, so a field
+        runs up to the start of the next key which is actually present. Keys
+        dumpsys did not print are skipped.
+        """
+        fields: dict[str, str] = {}
+        key = keys[0]
+        if not text.startswith(f"{key}:"):
+            return fields
+
+        remainder = text[len(key) + 1 :]
+        for next_key in keys[1:]:
+            value, separator, rest = remainder.partition(f" {next_key}:")
+            if separator:
+                fields[key] = value
+                key, remainder = next_key, rest
+
+        fields[key] = remainder
+        return fields
+
+    @staticmethod
+    def _parse_section_end(content: str) -> Optional[datetime]:
+        """Return the time the settings section was dumped, if reported."""
+        match = SECTION_END_PATTERN.search(content)
+        if not match:
+            return None
+
+        try:
+            return datetime.strptime(match.group(1), "%Y-%m-%d %H:%M:%S")
+        except ValueError:
+            return None
+
+    @staticmethod
+    def _resolve_timestamp(
+        value: str, section_end: Optional[datetime]
+    ) -> Optional[str]:
+        """Add the missing year to a `MM-DD HH:MM:SS.mmm` history timestamp.
+
+        dumpsys prints the change history without a year, so it is resolved
+        against the time the section was dumped: the most recent matching date
+        at or before that time.
+        """
+        if section_end is None:
+            return None
+
+        try:
+            partial = datetime.strptime(value, "%m-%d %H:%M:%S.%f")
+            timestamp = partial.replace(year=section_end.year)
+            if timestamp > section_end:
+                timestamp = partial.replace(year=section_end.year - 1)
+        except ValueError:
+            return None
+
+        return convert_datetime_to_iso(timestamp)
+
+    def _parse_history(
+        self, line: str, section_end: Optional[datetime]
+    ) -> ModuleAtomicResult:
+        fields = self._split_fields(line, HISTORY_FIELDS)
+        return {
+            "timestamp": self._resolve_timestamp(fields.get("time", ""), section_end),
+            "oldValue": fields.get("oldValue"),
+            "newValue": fields.get("newValue"),
+            "pkg": fields.get("package"),
+        }
+
+    def _build_record(
+        self,
+        namespace: Optional[str],
+        user: Optional[str],
+        record_lines: list[str],
+        history_lines: list[str],
+        section_end: Optional[datetime],
+    ) -> ModuleAtomicResult:
+        text = "\n".join(record_lines).rstrip()
+        # The bare `notPreservedInRestore` token has no `key:` shape and is
+        # printed last, so peel it off before splitting the fields.
+        head = text.removesuffix(" notPreservedInRestore")
+
+        record: ModuleAtomicResult = {"namespace": namespace, "user": user}
+        record.update(self._split_fields(head, SETTING_FIELDS))
+        if head != text:
+            record["isValuePreservedInRestore"] = "false"
+
+        record["history"] = [
+            self._parse_history(entry, section_end) for entry in history_lines
+        ]
+        return record

src/mvt/android/modules/androidqf/aqf_settings.py

@@ -3,11 +3,7 @@
 # Use of this software is governed by the MVT License 1.1 that can be found at
 #   https://license.mvt.re/1.1/
 
-import logging
-from typing import Optional
-
 from mvt.android.artifacts.settings import Settings as SettingsArtifact
-from mvt.common.module_types import ModuleResults
 
 from .base import AndroidQFModule
 
@@ -15,43 +11,23 @@ from .base import AndroidQFModule
 class AQFSettings(SettingsArtifact, AndroidQFModule):
     """This module analyse setting files"""
 
-    def __init__(
-        self,
-        file_path: Optional[str] = None,
-        target_path: Optional[str] = None,
-        results_path: Optional[str] = None,
-        module_options: Optional[dict] = None,
-        log: logging.Logger = logging.getLogger(__name__),
-        results: Optional[ModuleResults] = None,
-    ) -> None:
-        super().__init__(
-            file_path=file_path,
-            target_path=target_path,
-            results_path=results_path,
-            module_options=module_options,
-            log=log,
-            results=results,
-        )
-        self.results: dict = results if results is not None else {}
-
     def run(self) -> None:
         for setting_file in self._get_files_by_pattern("*/settings_*.txt"):
             namespace = setting_file[setting_file.rfind("_") + 1 : -4]
 
-            self.results[namespace] = {}
             data = self._get_file_content(setting_file)
             for line in data.decode("utf-8").splitlines():
-                line = line.strip()
-                try:
-                    key, value = line.split("=", 1)
-                except ValueError:
+                name, separator, value = line.strip().partition("=")
+                if not separator:
                     continue
 
-                try:
-                    self.results[namespace][key] = value
-                except IndexError:
-                    continue
+                self.results.append(
+                    {
+                        "namespace": namespace,
+                        "user": None,
+                        "name": name,
+                        "value": value,
+                    }
+                )
 
-        self.log.info(
-            "Identified %d settings", sum([len(val) for val in self.results.values()])
-        )
+        self.log.info("Identified %d settings", len(self.results))

src/mvt/android/modules/bugreport/settings.py

@@ -18,5 +18,4 @@ class Settings(SettingsArtifact, BugReportModule):
             data.decode("utf-8", errors="replace"), "DUMP OF SERVICE settings:"
         )
         self.parse(section)
-        count = sum(len(settings) for settings in self.results.values())
-        self.log.info("Identified %d Android settings", count)
+        self.log.info("Identified %d Android settings", len(self.results))

src/mvt/common/config.py

@@ -59,13 +59,16 @@ class MVTSettings(BaseSettings):
         dotenv_settings: PydanticBaseSettingsSource,
         file_secret_settings: PydanticBaseSettingsSource,
     ) -> Tuple[PydanticBaseSettingsSource, ...]:
-        yaml_source = YamlConfigSettingsSource(settings_cls, MVT_CONFIG_PATH)
         sources: Tuple[PydanticBaseSettingsSource, ...] = (
-            yaml_source,
+            YamlConfigSettingsSource(settings_cls, MVT_CONFIG_PATH),
             init_settings,
         )
-        # Always load env variables by default
-        sources = (env_settings,) + sources
+        # Load env variables only when asked to. initialise() constructs the
+        # settings once without them so that what gets written back to
+        # config.yaml never includes values taken from the environment.
+        # init_settings() returns the keyword arguments passed to the constructor.
+        if init_settings().get("load_env", True):
+            sources = (env_settings,) + sources
         return sources
 
     def save_settings(
@@ -92,7 +95,7 @@ class MVTSettings(BaseSettings):
 
         Afterwards we load the settings again, this time including the env variables.
         """
-        # Set invalid env prefix to avoid loading env variables.
+        # Construct the settings without env variables so they are not persisted.
         settings = cls(load_env=False)
         settings.save_settings()
 

src/mvt/common/help.py

@@ -39,6 +39,7 @@ HELP_MSG_DECRYPT_BACKUP = "Decrypt an encrypted iTunes backup"
 HELP_MSG_BACKUP_DESTINATION = (
     "Path to the folder where the decrypted backup should be stored"
 )
+HELP_MSG_DECRYPT_JOBS = "Number of files to decrypt concurrently"
 HELP_MSG_IOS_BACKUP_PASSWORD = (
     "Password to use to decrypt the backup (or, set the {MVT_IOS_BACKUP_PASSWORD} "
     "environment variable)"

src/mvt/ios/cli.py

@@ -24,6 +24,7 @@ from mvt.common.help import (
     HELP_MSG_VERSION,
     HELP_MSG_DECRYPT_BACKUP,
     HELP_MSG_BACKUP_DESTINATION,
+    HELP_MSG_DECRYPT_JOBS,
     HELP_MSG_IOS_BACKUP_PASSWORD,
     HELP_MSG_BACKUP_KEYFILE,
     HELP_MSG_HASHES,
@@ -45,6 +46,10 @@ from mvt.common.help import (
     HELP_MSG_DISABLE_INDICATOR_UPDATE_CHECK,
 )
 from mvt.common.password import prompt_password
+from .decrypt_config import (
+    DEFAULT_DECRYPT_WORKERS,
+    MAX_DECRYPT_WORKERS,
+)
 
 # The commands import what they run only when they are invoked. This module is
 # imported at every start of mvt-ios, including by shell completion on every
@@ -128,6 +133,13 @@ def version():
     "decrypt-backup", context_settings=CONTEXT_SETTINGS, help=HELP_MSG_DECRYPT_BACKUP
 )
 @click.option("--destination", "-d", required=True, help=HELP_MSG_BACKUP_DESTINATION)
+@click.option(
+    "--jobs",
+    type=click.IntRange(1, MAX_DECRYPT_WORKERS),
+    default=DEFAULT_DECRYPT_WORKERS,
+    show_default=True,
+    help=HELP_MSG_DECRYPT_JOBS,
+)
 @click.option(
     "--password",
     "-p",
@@ -146,10 +158,10 @@ def version():
 @click.option("--hashes", "-H", is_flag=True, help=HELP_MSG_HASHES)
 @click.argument("BACKUP_PATH", type=click.Path(exists=True))
 @click.pass_context
-def decrypt_backup(ctx, destination, password, key_file, hashes, backup_path):
+def decrypt_backup(ctx, destination, jobs, password, key_file, hashes, backup_path):
     from .decrypt import DecryptBackup
 
-    backup = DecryptBackup(backup_path, destination)
+    backup = DecryptBackup(backup_path, destination, max_workers=jobs)
 
     if key_file:
         if MVT_IOS_BACKUP_PASSWORD in os.environ:

src/mvt/ios/decrypt.py

@@ -6,18 +6,179 @@
 import binascii
 import glob
 import logging
-import multiprocessing
 import os
 import os.path
+import plistlib
 import shutil
 import sqlite3
+import tempfile
+from concurrent.futures import (
+    ALL_COMPLETED,
+    FIRST_COMPLETED,
+    Future,
+    ThreadPoolExecutor,
+    wait,
+)
 from pathlib import Path
 from typing import Optional
 
-from iOSbackup import iOSbackup
+from iphone_backup_decrypt import EncryptedBackup
+from iphone_backup_decrypt import google_iphone_dataprotection
+from iphone_backup_decrypt.utils import FilePlist
+
+from .decrypt_config import DEFAULT_DECRYPT_WORKERS, MAX_DECRYPT_WORKERS
 
 log = logging.getLogger(__name__)
 
+# Import pbkdf2_hmac from the same source iphone_backup_decrypt uses internally,
+# so our key derivation is consistent with theirs.
+try:
+    from fastpbkdf2 import pbkdf2_hmac
+except ImportError:
+    import Crypto.Hash.SHA1
+    import Crypto.Hash.SHA256
+    import Crypto.Protocol.KDF
+
+    _HASH_FNS = {"sha1": Crypto.Hash.SHA1, "sha256": Crypto.Hash.SHA256}
+
+    def pbkdf2_hmac(hash_name, password, salt, iterations, dklen=None):
+        return Crypto.Protocol.KDF.PBKDF2(
+            password, salt, dklen, iterations, hmac_hash_module=_HASH_FNS[hash_name]
+        )
+
+
+class MVTEncryptedBackup(EncryptedBackup):
+    """Extends EncryptedBackup with derived key export/import.
+
+    NOTE: This subclass relies on internal APIs of iphone_backup_decrypt
+    (specifically _read_and_unlock_keybag, _keybag, and the Keybag class
+    internals). Pinned to iphone_backup_decrypt==0.9.0.
+    """
+
+    def __init__(self, *, backup_directory, passphrase=None, derived_key=None):
+        if passphrase:
+            super().__init__(backup_directory=backup_directory, passphrase=passphrase)
+            self._derived_key = None  # Will be set after keybag unlock
+        elif derived_key:
+            self._init_without_passphrase(backup_directory, derived_key)
+        else:
+            raise ValueError("Either passphrase or derived_key must be provided")
+
+    def _init_without_passphrase(self, backup_directory, derived_key):
+        """Replicate parent __init__ state without requiring a passphrase."""
+        self.decrypted = False
+        self._backup_directory = os.path.expandvars(backup_directory)
+        self._passphrase = None
+        self._manifest_plist_path = os.path.join(
+            self._backup_directory, "Manifest.plist"
+        )
+        self._manifest_plist = None
+        self._manifest_db_path = os.path.join(self._backup_directory, "Manifest.db")
+        self._keybag = None
+        self._unlocked = False
+        self._temporary_folder = tempfile.mkdtemp()
+        self._temp_decrypted_manifest_db_path = os.path.join(
+            self._temporary_folder, "Manifest.db"
+        )
+        self._temp_manifest_db_conn = None
+        self._derived_key = derived_key  # 32 raw bytes
+
+    def _read_and_unlock_keybag(self):
+        """Override to capture derived key on password unlock, or use
+        a pre-derived key to skip PBKDF2."""
+        if self._unlocked:
+            return self._unlocked
+
+        with open(self._manifest_plist_path, "rb") as infile:
+            self._manifest_plist = plistlib.load(infile)
+        self._keybag = google_iphone_dataprotection.Keybag(
+            self._manifest_plist["BackupKeyBag"]
+        )
+
+        if self._derived_key:
+            # Skip PBKDF2, unwrap class keys directly with pre-derived key
+            self._unlocked = _unlock_keybag_with_derived_key(
+                self._keybag, self._derived_key
+            )
+        else:
+            # Normal path: full PBKDF2 derivation, capturing the intermediate key
+            self._unlocked, self._derived_key = _unlock_keybag_and_capture_key(
+                self._keybag, self._passphrase
+            )
+            self._passphrase = None
+
+        if not self._unlocked:
+            raise ValueError("Failed to decrypt keys: incorrect passphrase?")
+        return True
+
+    def get_decryption_key(self):
+        """Return derived key as hex string (64 chars / 32 bytes)."""
+        if self._derived_key is None:
+            raise ValueError("No derived key available")
+        return self._derived_key.hex()
+
+    def extract_file_by_id(self, *, file_id, file_bplist, output_filename):
+        """Extract one manifest entry without loading the whole file into memory."""
+        self._read_and_unlock_keybag()
+        file_plist = FilePlist(file_bplist)
+
+        if file_plist.encryption_key is None:
+            source_filename = os.path.join(
+                self._backup_directory, file_id[:2], file_id
+            )
+            shutil.copy2(source_filename, output_filename)
+            return
+
+        inner_key = self._keybag.unwrapKeyForClass(
+            file_plist.protection_class, file_plist.encryption_key
+        )
+        self._decrypt_file_to_disk(
+            file_id=file_id,
+            key=inner_key,
+            file_plist=file_plist,
+            output_filepath=output_filename,
+        )
+
+
+def _unlock_keybag_with_derived_key(keybag, passphrase_key):
+    """Unlock keybag class keys using a pre-derived passphrase_key,
+    skipping the expensive PBKDF2 rounds."""
+    WRAP_PASSPHRASE = 2
+    for classkey in keybag.classKeys.values():
+        if b"WPKY" not in classkey:
+            continue
+        if classkey[b"WRAP"] & WRAP_PASSPHRASE:
+            k = google_iphone_dataprotection._AESUnwrap(
+                passphrase_key, classkey[b"WPKY"]
+            )
+            if not k:
+                return False
+            classkey[b"KEY"] = k
+    return True
+
+
+def _unlock_keybag_and_capture_key(keybag, passphrase):
+    """Run full PBKDF2 key derivation and AES unwrap, returning
+    (success, passphrase_key) so the derived key can be exported."""
+    passphrase_round1 = pbkdf2_hmac(
+        "sha256", passphrase, keybag.attrs[b"DPSL"], keybag.attrs[b"DPIC"], 32
+    )
+    passphrase_key = pbkdf2_hmac(
+        "sha1", passphrase_round1, keybag.attrs[b"SALT"], keybag.attrs[b"ITER"], 32
+    )
+    WRAP_PASSPHRASE = 2
+    for classkey in keybag.classKeys.values():
+        if b"WPKY" not in classkey:
+            continue
+        if classkey[b"WRAP"] & WRAP_PASSPHRASE:
+            k = google_iphone_dataprotection._AESUnwrap(
+                passphrase_key, classkey[b"WPKY"]
+            )
+            if not k:
+                return False, None
+            classkey[b"KEY"] = k
+    return True, passphrase_key
+
 
 class DecryptBackup:
     """This class provides functions to decrypt an encrypted iTunes backup
@@ -26,19 +187,68 @@ class DecryptBackup:
 
     """
 
-    def __init__(self, backup_path: str, dest_path: Optional[str] = None) -> None:
+    def __init__(
+        self,
+        backup_path: str,
+        dest_path: Optional[str] = None,
+        max_workers: int = DEFAULT_DECRYPT_WORKERS,
+    ) -> None:
         """Decrypts an encrypted iOS backup.
         :param backup_path: Path to the encrypted backup folder
         :param dest_path: Path to the folder where to store the decrypted backup
         """
         self.backup_path = os.path.abspath(backup_path)
         self.dest_path = dest_path
-        self._backup = None
-        self._decryption_key = None
+        if not 1 <= max_workers <= MAX_DECRYPT_WORKERS:
+            raise ValueError(f"max_workers must be between 1 and {MAX_DECRYPT_WORKERS}")
+        self.max_workers = max_workers
+        self._backup: Optional[MVTEncryptedBackup] = None
+        self._decryption_key: Optional[str] = None
 
     def can_process(self) -> bool:
         return self._backup is not None
 
+    def _process_file(
+        self,
+        *,
+        file_id: str,
+        file_bplist: bytes,
+        output_path: Path,
+        relative_path: str,
+        domain: str,
+    ) -> None:
+        assert self._backup is not None
+        self._backup.extract_file_by_id(
+            file_id=file_id,
+            file_bplist=file_bplist,
+            output_filename=str(output_path),
+        )
+        log.info(
+            "Decrypted file %s [%s] to %s/%s",
+            relative_path,
+            domain,
+            output_path.parent,
+            file_id,
+        )
+
+    @staticmethod
+    def _wait_for_files(
+        pending: dict[Future[None], str], *, all_files: bool = False
+    ) -> None:
+        if not pending:
+            return
+
+        done, _ = wait(
+            pending,
+            return_when=ALL_COMPLETED if all_files else FIRST_COMPLETED,
+        )
+        for future in done:
+            relative_path = pending.pop(future)
+            try:
+                future.result()
+            except Exception as exc:
+                log.error("Failed to decrypt file %s: %s", relative_path, exc)
+
     @staticmethod
     def is_encrypted(backup_path: str) -> bool:
         """Query Manifest.db file to see if it's encrypted or not.
@@ -58,21 +268,6 @@ class DecryptBackup:
         finally:
             conn.close()
 
-    def _process_file(
-        self, relative_path: str, domain: str, item, file_id: str, item_folder: str
-    ) -> None:
-        assert self._backup is not None
-        self._backup.getFileDecryptedCopy(
-            manifestEntry=item, targetName=file_id, targetFolder=item_folder
-        )
-        log.info(
-            "Decrypted file %s [%s] to %s/%s",
-            relative_path,
-            domain,
-            item_folder,
-            file_id,
-        )
-
     def process_backup(self) -> None:
         assert self._backup is not None
         assert self.dest_path is not None
@@ -81,53 +276,71 @@ class DecryptBackup:
             os.makedirs(self.dest_path)
 
         manifest_path = os.path.join(self.dest_path, "Manifest.db")
-        # We extract a decrypted Manifest.db.
-        self._backup.getManifestDB()
-        # We store it to the destination folder.
-        shutil.copy(self._backup.manifestDB, manifest_path)
+        # Extract a decrypted Manifest.db to the destination folder.
+        self._backup.save_manifest_file(output_filename=manifest_path)
 
-        pool = multiprocessing.Pool(multiprocessing.cpu_count())
-
-        for item in self._backup.getBackupFilesList():
-            try:
-                file_id = item["backupFile"]
-                relative_path = item["relativePath"]
-                domain = item["domain"]
-
-                # This may be a partial backup. Skip files from the manifest
-                # which do not exist locally.
-                source_file_path = os.path.join(self.backup_path, file_id[0:2], file_id)
-                if not Path(source_file_path).resolve().is_relative_to(Path(self.backup_path).resolve()):
-                    log.warning("Skipping unsafe file_id: %r", file_id)
-                    continue
-                if not os.path.exists(source_file_path):
-                    log.debug(
-                        "Skipping file %s. File not found in encrypted backup directory.",
-                        source_file_path,
-                    )
-                    continue
-
-                item_folder = os.path.join(self.dest_path, file_id[0:2])  # type: ignore[arg-type]
-                if not Path(os.path.join(item_folder, file_id)).resolve().is_relative_to(Path(self.dest_path).resolve()):
-                    log.warning("Skipping unsafe file_id: %r", file_id)
-                    continue
-                if not os.path.exists(item_folder):
-                    os.makedirs(item_folder)
-
-                # iOSBackup getFileDecryptedCopy() claims to read a "file"
-                # parameter but the code actually is reading the "manifest" key.
-                # Add manifest plist to both keys to handle this.
-                item["manifest"] = item["file"]
-
-                pool.apply_async(
-                    self._process_file,
-                    args=(relative_path, domain, item, file_id, item_folder),
+        # Iterate over all files in the backup and decrypt them,
+        # preserving the XX/file_id directory structure that downstream
+        # modules expect.
+        backup_root = Path(self.backup_path).resolve()
+        dest_root = Path(self.dest_path).resolve()
+        pending: dict[Future[None], str] = {}
+        with ThreadPoolExecutor(max_workers=self.max_workers) as executor:
+            with self._backup.manifest_db_cursor() as cur:
+                cur.execute(
+                    "SELECT fileID, domain, relativePath, file FROM Files WHERE flags=1"
                 )
-            except Exception as exc:
-                log.error("Failed to decrypt file %s: %s", relative_path, exc)
+                for file_id, domain, relative_path, file_bplist in cur:
+                    # This may be a partial backup. Skip files from the manifest
+                    # which do not exist locally.
+                    source_file_path = backup_root / file_id[:2] / file_id
+                    if not source_file_path.resolve().is_relative_to(backup_root):
+                        log.warning("Skipping unsafe file_id: %r", file_id)
+                        continue
+                    if not os.path.exists(source_file_path):
+                        log.debug(
+                            "Skipping file %s. File not found in encrypted "
+                            "backup directory.",
+                            source_file_path,
+                        )
+                        continue
 
-        pool.close()
-        pool.join()
+                    output_path = dest_root / file_id[:2] / file_id
+                    if not output_path.resolve().is_relative_to(dest_root):
+                        log.warning("Skipping unsafe file_id: %r", file_id)
+                        continue
+                    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+                    if self.max_workers == 1:
+                        try:
+                            self._process_file(
+                                file_id=file_id,
+                                file_bplist=file_bplist,
+                                output_path=output_path,
+                                relative_path=relative_path,
+                                domain=domain,
+                            )
+                        except Exception as exc:
+                            log.error(
+                                "Failed to decrypt file %s: %s",
+                                relative_path,
+                                exc,
+                            )
+                        continue
+
+                    future = executor.submit(
+                        self._process_file,
+                        file_id=file_id,
+                        file_bplist=file_bplist,
+                        output_path=output_path,
+                        relative_path=relative_path,
+                        domain=domain,
+                    )
+                    pending[future] = relative_path
+                    if len(pending) >= self.max_workers:
+                        self._wait_for_files(pending)
+
+            self._wait_for_files(pending, all_files=True)
 
         # Copying over the root plist files as well.
         for file_name in os.listdir(self.backup_path):
@@ -168,20 +381,23 @@ class DecryptBackup:
             return
 
         try:
-            self._backup = iOSbackup(
-                udid=os.path.basename(self.backup_path),
-                cleartextpassword=password,
-                backuproot=os.path.dirname(self.backup_path),
+            self._backup = MVTEncryptedBackup(
+                backup_directory=self.backup_path,
+                passphrase=password,
             )
+            # Eagerly trigger keybag unlock so wrong-password errors
+            # surface here rather than later during process_backup().
+            self._backup.test_decryption()
         except Exception as exc:
+            self._backup = None
             if (
-                isinstance(exc, KeyError)
-                and len(exc.args) > 0
-                and exc.args[0] == b"KEY"
+                isinstance(exc, ValueError)
+                and "passphrase" in str(exc).lower()
             ):
                 log.critical("Failed to decrypt backup. Password is probably wrong.")
             elif (
                 isinstance(exc, FileNotFoundError)
+                and hasattr(exc, "filename")
                 and os.path.basename(exc.filename) == "Manifest.plist"
             ):
                 log.critical(
@@ -224,12 +440,14 @@ class DecryptBackup:
 
         try:
             key_bytes_raw = binascii.unhexlify(key_bytes)
-            self._backup = iOSbackup(
-                udid=os.path.basename(self.backup_path),
-                derivedkey=key_bytes_raw,
-                backuproot=os.path.dirname(self.backup_path),
+            self._backup = MVTEncryptedBackup(
+                backup_directory=self.backup_path,
+                derived_key=key_bytes_raw,
             )
+            # Eagerly trigger keybag unlock so wrong-key errors surface here.
+            self._backup.test_decryption()
         except Exception as exc:
+            self._backup = None
             log.exception(exc)
             log.critical(
                 "Failed to decrypt backup. Did you provide the correct key file?"
@@ -240,7 +458,7 @@ class DecryptBackup:
         if not self._backup:
             return
 
-        self._decryption_key = self._backup.getDecryptionKey()
+        self._decryption_key = self._backup.get_decryption_key()
         log.info(
             'Derived decryption key for backup at path %s is: "%s"',
             self.backup_path,

src/mvt/ios/decrypt_config.py

@@ -0,0 +1,9 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2026 The MVT Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+"""Configuration shared by the iOS CLI and backup decryption implementation."""
+
+DEFAULT_DECRYPT_WORKERS = 4
+MAX_DECRYPT_WORKERS = 32

tests/android/test_artifact_settings.py

@@ -0,0 +1,170 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2021-2023 The MVT Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+from mvt.android.artifacts.settings import Settings
+
+from ..utils import get_artifact
+
+
+def parse_bugreport_settings() -> Settings:
+    settings = Settings()
+    with open(get_artifact("android_data/bugreport/dumpstate.txt")) as handle:
+        data = handle.read()
+
+    settings.parse(settings.extract_dumpsys_section(data, "DUMP OF SERVICE settings:"))
+    return settings
+
+
+def find(settings: Settings, name: str) -> list:
+    return [result for result in settings.results if result["name"] == name]
+
+
+class TestSettingsArtifact:
+    def test_parsing(self):
+        settings = parse_bugreport_settings()
+
+        assert len(settings.results) == 12
+        assert {result["namespace"] for result in settings.results} == {
+            "config",
+            "global",
+            "secure",
+        }
+        assert settings.results[0] == {
+            "namespace": "config",
+            "user": "0",
+            "_id": "682",
+            "name": "namespace_one/blocked_components",
+            "pkg": "com.example.services",
+            "value": (
+                "com.android.settings,com.android.vending,\n"
+                "com.example.dialer,\n"
+                "com.example.camera"
+            ),
+            "default": (
+                "com.android.settings,\n"
+                "        com.android.vending,\n"
+                "        com.example.dialer"
+            ),
+            "defaultSystemSet": "false",
+            "history": [],
+        }
+
+    def test_multiline_values_are_kept_whole(self):
+        settings = parse_bugreport_settings()
+
+        assert find(settings, "namespace_one/allowed_packages")[0]["value"] == (
+            "com.example.messaging,\ncom.example.chat"
+        )
+        assert find(settings, "widget_instance_data")[0]["value"] == (
+            '{\n  "version": 1,\n  "data": [\n    {\n      "number": 10000,\n'
+            '      "package_name": "com.example.widget"\n    }\n  ]\n}'
+        )
+
+    def test_trailing_default_is_not_part_of_the_value(self):
+        settings = parse_bugreport_settings()
+
+        record = find(settings, "namespace_one/streaming_blocked_components")[0]
+        assert record["value"] == "com.example.dialer,com.example.camera"
+        assert record["default"] == "com.android.settings,\n        com.android.vending"
+
+    def test_trailing_metadata_is_not_part_of_the_value(self):
+        settings = parse_bugreport_settings()
+
+        record = find(settings, "lock_screen_show_notifications")[0]
+        assert record["value"] == "1"
+        assert record["defaultSystemSet"] == "true"
+        assert record["isValuePreservedInRestore"] == "true"
+
+        # Without a default, the tag or the restore token follows the value.
+        record = find(settings, "accessibility_enabled")[1]
+        assert record["value"] == "0"
+        assert record["tag"] == "null"
+        assert "default" not in record
+
+        record = find(settings, "send_action_app_error")[0]
+        assert record["value"] == "1"
+        assert record["isValuePreservedInRestore"] == "false"
+
+    def test_dumps_after_the_last_block_are_not_part_of_the_last_row(self):
+        settings = parse_bugreport_settings()
+
+        assert settings.results[-1] == {
+            "namespace": "secure",
+            "user": "10",
+            "_id": "311",
+            "name": "accessibility_enabled",
+            "pkg": "android",
+            "value": "0",
+            "tag": "null",
+            "history": [],
+        }
+
+    def test_repeated_names_are_kept_as_separate_records(self):
+        settings = parse_bugreport_settings()
+
+        widgets = find(settings, "widget_instance_data")
+        assert [record["_id"] for record in widgets] == ["771", "41654"]
+
+        accessibility = find(settings, "accessibility_enabled")
+        assert [(record["user"], record["value"]) for record in accessibility] == [
+            ("0", "1"),
+            ("10", "0"),
+        ]
+
+    def test_setting_without_recording_package(self):
+        settings = parse_bugreport_settings()
+
+        record = find(settings, "hidden_api_blacklist_exemptions")[0]
+        assert "pkg" not in record
+        assert record["value"] == "{null}"
+
+    def test_history_timestamps_resolved_against_section_end(self):
+        settings = parse_bugreport_settings()
+
+        # The section was dumped on 2022-03-29, so an 11-02 entry belongs to
+        # the previous year and an 03-14 entry to the same year.
+        assert find(settings, "development_settings_enabled")[0]["history"] == [
+            {
+                "timestamp": "2021-11-02 11:21:22.212000",
+                "oldValue": "null",
+                "newValue": "1",
+                "pkg": "com.android.settings",
+            },
+            {
+                "timestamp": "2022-03-14 09:02:11.100000",
+                "oldValue": "1",
+                "newValue": "0",
+                "pkg": "com.example.updater",
+            },
+        ]
+
+    def test_history_without_a_section_end_has_no_timestamp(self):
+        settings = Settings()
+        settings.parse(
+            "SECURE SETTINGS (user 0)\n"
+            "_id:240 name:accessibility_enabled pkg:android value:1\n"
+            "\tHistory (accessibility_enabled)\n"
+            "\t\ttime:03-28 22:41:07.980 mode:update oldValue:0 newValue:1 "
+            "package:com.example.helper\n"
+        )
+
+        assert settings.results[0]["history"] == [
+            {
+                "timestamp": None,
+                "oldValue": "0",
+                "newValue": "1",
+                "pkg": "com.example.helper",
+            }
+        ]
+
+    def test_dangerous_setting_is_detected_with_the_changing_package(self):
+        settings = parse_bugreport_settings()
+        settings.check_indicators()
+
+        assert len(settings.alertstore.alerts) == 1
+        alert = settings.alertstore.alerts[0]
+        assert "accessibility_enabled = 1" in alert.message
+        assert alert.event_time == "2022-03-28 22:41:07.980000"
+        assert alert.event["history"][0]["pkg"] == "com.example.helper"

tests/android_androidqf/test_settings.py

@@ -6,27 +6,12 @@
 from pathlib import Path
 
 from mvt.android.modules.androidqf.aqf_settings import AQFSettings
-from mvt.android.artifacts.settings import Settings
 from mvt.common.module import run_module
 
 from ..utils import get_android_androidqf, list_files
 
 
 class TestSettingsModule:
-    def test_bugreport_settings_format(self):
-        settings = Settings()
-        settings.parse(
-            "GLOBAL SETTINGS (user 0)\n"
-            "_id:1 name:adb_wifi_enabled pkg:android value:0 default:0 defaultSystemSet:true\n"
-            "SECURE SETTINGS (user 10)\n"
-            "_id:2 name:accessibility_enabled pkg:android value:1\n"
-        )
-
-        assert settings.results == {
-            "global:user_0": {"adb_wifi_enabled": "0"},
-            "secure:user_10": {"accessibility_enabled": "1"},
-        }
-
     def test_parsing(self):
         data_path = get_android_androidqf()
         m = AQFSettings(target_path=data_path)
@@ -34,7 +19,13 @@ class TestSettingsModule:
         parent_path = Path(data_path).absolute().parent.as_posix()
         m.from_dir(parent_path, files)
         run_module(m)
-        assert len(m.results) == 1
-        assert "random" in m.results.keys()
+        assert len(m.results) == 9
+        assert {result["namespace"] for result in m.results} == {"random"}
+        assert m.results[0] == {
+            "namespace": "random",
+            "user": None,
+            "name": "samsung_errorlog_agree",
+            "value": "0",
+        }
         assert len(m.alertstore.alerts) == 1
         assert "samsung_errorlog_agree" in m.alertstore.alerts[0].message

tests/android_bugreport/test_bugreport.py

@@ -10,6 +10,7 @@ from mvt.android.modules.bugreport.dumpsys_appops import DumpsysAppops
 from mvt.android.modules.bugreport.dumpsys_getprop import DumpsysGetProp
 from mvt.android.modules.bugreport.dumpsys_packages import DumpsysPackages
 from mvt.android.modules.bugreport.dumpsys_receivers import DumpsysReceivers
+from mvt.android.modules.bugreport.settings import Settings
 from mvt.android.modules.bugreport.tombstones import Tombstones
 from mvt.common.module import run_module
 
@@ -93,6 +94,25 @@ class TestBugreportAnalysis:
         assert alert.event == malicious_receiver
         assert alert.matched_indicator.value == "com.android.services"
 
+    def test_settings_module(self):
+        m = self.launch_bug_report_module(Settings)
+        assert len(m.results) == 12
+
+        assert len(m.alertstore.alerts) == 1
+        assert "accessibility_enabled = 1" in m.alertstore.alerts[0].message
+
+        assert len(m.timeline) == 3
+        change = [
+            entry
+            for entry in m.timeline
+            if entry["timestamp"] == "2022-03-28 22:41:07.980000"
+        ][0]
+        assert change["event"] == "settings_change"
+        assert change["data"] == (
+            'secure setting "accessibility_enabled" changed from "0" to "1" '
+            "by com.example.helper"
+        )
+
     def test_tombstones_modules(self):
         m = self.launch_bug_report_module(Tombstones)
         assert len(m.results) == 2

tests/artifacts/android_data/bugreport/dumpstate.txt

@@ -264,5 +264,53 @@ ChangeId(143539591; name=SELINUX_LATEST_CHANGES; disabled)
 ChangeId(247079863; name=DISALLOW_INVALID_GROUP_REFERENCE; enableSinceTargetSdk=34)
 ChangeId(174227820; name=FORCE_DISABLE_HEVC_SUPPORT; disabled)
 ChangeId(168419799; name=DOWNSCALED; disabled; packageOverrides={com.google.android.apps.tachyon=false, org.torproject.torbrowser=false}; rawOverrides={org.torproject.torbrowser=false, org.article19.circulo.next=false}; overridable)
+-------------------------------------------------------------------------------
+DUMP OF SERVICE settings:
+CONFIG SETTINGS (user 0)
+_id:682 name:namespace_one/blocked_components pkg:com.example.services value:com.android.settings,com.android.vending,
+com.example.dialer,
+com.example.camera default:com.android.settings,
+        com.android.vending,
+        com.example.dialer defaultSystemSet:false
+_id:684 name:namespace_one/streaming_blocked_components pkg:com.example.services value:com.example.dialer,com.example.camera default:com.android.settings,
+        com.android.vending defaultSystemSet:false
+_id:680 name:namespace_one/allowed_packages pkg:com.example.services value:com.example.messaging,
+com.example.chat
 
+GLOBAL SETTINGS (user 0)
+_id:2070 name:adb_wifi_enabled pkg:android value:0 default:0 defaultSystemSet:true
+_id:778 name:hidden_api_blacklist_exemptions value:{null}
+_id:9640 name:send_action_app_error pkg:android value:1 notPreservedInRestore
+_id:9631 name:development_settings_enabled pkg:com.android.settings value:1 default:1 defaultSystemSet:true
+	History (development_settings_enabled)
+		time:11-02 11:21:22.212 mode:update oldValue:null newValue:1 package:com.android.settings
+		time:03-14 09:02:11.100 mode:update oldValue:1 newValue:0 package:com.example.updater
+_id:771 name:widget_instance_data pkg:com.android.systemui value:{
+  "version": 1,
+  "data": [
+    {
+      "number": 10000,
+      "package_name": "com.example.widget"
+    }
+  ]
+} defaultSystemSet:true
+_id:41654 name:widget_instance_data pkg:com.android.systemui value:{
+  "version": 3,
+  "data": []
+} defaultSystemSet:true
 
+SECURE SETTINGS (user 0)
+_id:907 name:lock_screen_show_notifications pkg:com.android.settings value:1 default:1 defaultSystemSet:true isValuePreservedInRestore:true
+_id:240 name:accessibility_enabled pkg:android value:1 default:0 defaultSystemSet:true
+	History (accessibility_enabled)
+		time:03-28 22:41:07.980 mode:update oldValue:0 newValue:1 package:com.example.helper
+
+SECURE SETTINGS (user 10)
+_id:311 name:accessibility_enabled pkg:android value:0 tag:null
+
+GENERATION REGISTRY
+Maximum number of backing stores:8
+Number of backing stores:1
+_Backing store for type:SETTINGS_SECURE user:10 size:1024 cachedEntries:1
+
+--------- 0.019s was the duration of dumpsys settings, ending at: 2022-03-29 23:14:28

tests/common/test_config.py

@@ -0,0 +1,30 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2021-2026 The MVT Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+import os
+
+import yaml
+
+from mvt.common import config
+from mvt.common.config import MVTSettings
+
+
+def test_env_variables_are_not_persisted_to_config_file(tmp_path, monkeypatch):
+    config_path = tmp_path / "config.yaml"
+    monkeypatch.setattr(config, "MVT_CONFIG_FOLDER", str(tmp_path))
+    monkeypatch.setattr(config, "MVT_CONFIG_PATH", str(config_path))
+    monkeypatch.setenv("MVT_NETWORK_ACCESS_ALLOWED", "false")
+    monkeypatch.setenv("MVT_IOS_BACKUP_PASSWORD", "env-only-password")
+
+    settings = MVTSettings.initialise()
+
+    assert os.path.isfile(config_path)
+    saved = yaml.safe_load(config_path.read_text()) or {}
+    assert "NETWORK_ACCESS_ALLOWED" not in saved
+    assert "IOS_BACKUP_PASSWORD" not in saved
+
+    # The environment must still apply to the settings in use.
+    assert settings.NETWORK_ACCESS_ALLOWED is False
+    assert settings.IOS_BACKUP_PASSWORD == "env-only-password"

tests/ios_backup/test_decrypt.py

@@ -0,0 +1,191 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2021-2023 The MVT Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+import logging
+import threading
+from pathlib import Path
+
+from Crypto.Cipher import AES
+
+from mvt.ios.decrypt import DecryptBackup, MVTEncryptedBackup
+
+
+def _encrypted_file(backup_path, file_id, key, plaintext):
+    padding_length = AES.block_size - (len(plaintext) % AES.block_size)
+    padded = plaintext + bytes([padding_length]) * padding_length
+    encrypted = AES.new(key, AES.MODE_CBC, iv=b"\x00" * AES.block_size).encrypt(
+        padded
+    )
+    source_path = backup_path / file_id[:2] / file_id
+    source_path.parent.mkdir(parents=True)
+    source_path.write_bytes(encrypted)
+
+
+def test_extract_file_by_id_preserves_bytes_with_wrong_manifest_size(
+    mocker, tmp_path
+):
+    file_id = "ab" + "1" * 38
+    plaintext = b"complete decrypted content"
+    inner_key = b"k" * 32
+    _encrypted_file(tmp_path, file_id, inner_key, plaintext)
+
+    file_plist = mocker.Mock(
+        encryption_key=b"wrapped-key",
+        protection_class=1,
+        filesize=1,
+        mtime=None,
+    )
+    mocker.patch("mvt.ios.decrypt.FilePlist", return_value=file_plist)
+
+    backup = MVTEncryptedBackup(
+        backup_directory=str(tmp_path), derived_key=b"d" * 32
+    )
+    mocker.patch.object(backup, "_read_and_unlock_keybag", return_value=True)
+    backup._keybag = mocker.Mock()
+    backup._keybag.unwrapKeyForClass.return_value = inner_key
+    streaming_decrypt = mocker.spy(backup, "_decrypt_file_to_disk")
+    output_path = tmp_path / "output"
+
+    backup.extract_file_by_id(
+        file_id=file_id,
+        file_bplist=b"plist",
+        output_filename=str(output_path),
+    )
+
+    assert output_path.read_bytes() == plaintext
+    streaming_decrypt.assert_called_once()
+
+
+def test_extract_file_by_id_copies_unencrypted_files(mocker, tmp_path):
+    file_id = "cd" + "2" * 38
+    source_path = tmp_path / file_id[:2] / file_id
+    source_path.parent.mkdir(parents=True)
+    source_path.write_bytes(b"plain content")
+
+    file_plist = mocker.Mock(encryption_key=None)
+    mocker.patch("mvt.ios.decrypt.FilePlist", return_value=file_plist)
+    backup = MVTEncryptedBackup(
+        backup_directory=str(tmp_path), derived_key=b"d" * 32
+    )
+    mocker.patch.object(backup, "_read_and_unlock_keybag", return_value=True)
+    output_path = tmp_path / "output"
+
+    backup.extract_file_by_id(
+        file_id=file_id,
+        file_bplist=b"plist",
+        output_filename=str(output_path),
+    )
+
+    assert output_path.read_bytes() == b"plain content"
+
+
+def test_process_backup_rejects_unsafe_file_ids_and_destinations(mocker, tmp_path):
+    backup_path = tmp_path / "backup"
+    destination = tmp_path / "destination"
+    outside = tmp_path / "outside"
+    backup_path.mkdir()
+    destination.mkdir()
+    outside.mkdir()
+
+    safe_file_id = "ef" + "3" * 38
+    unsafe_file_id = "../../outside-file"
+    symlink_file_id = "ab" + "4" * 38
+    for file_id in (safe_file_id, symlink_file_id):
+        source_path = backup_path / file_id[:2] / file_id
+        source_path.parent.mkdir(parents=True, exist_ok=True)
+        source_path.write_bytes(b"encrypted")
+    (destination / "ab").symlink_to(outside, target_is_directory=True)
+
+    cursor = mocker.MagicMock()
+    cursor.__iter__.return_value = iter(
+        [
+            (safe_file_id, "Domain", "safe", b"plist"),
+            (unsafe_file_id, "Domain", "unsafe", b"plist"),
+            (symlink_file_id, "Domain", "symlink", b"plist"),
+        ]
+    )
+    cursor_context = mocker.MagicMock()
+    cursor_context.__enter__.return_value = cursor
+
+    backup = mocker.MagicMock()
+    backup.manifest_db_cursor.return_value = cursor_context
+
+    def extract_file_by_id(*, output_filename, **kwargs):
+        Path(output_filename).write_bytes(b"decrypted")
+
+    backup.extract_file_by_id.side_effect = extract_file_by_id
+    decryptor = DecryptBackup(
+        str(backup_path), str(destination), max_workers=1
+    )
+    decryptor._backup = backup
+
+    decryptor.process_backup()
+
+    assert (destination / safe_file_id[:2] / safe_file_id).read_bytes() == b"decrypted"
+    assert not (outside / symlink_file_id).exists()
+    backup.extract_file_by_id.assert_called_once()
+    assert backup.extract_file_by_id.call_args.kwargs["file_id"] == safe_file_id
+
+
+def test_process_backup_decrypts_files_concurrently(mocker, tmp_path):
+    backup_path = tmp_path / "backup"
+    destination = tmp_path / "destination"
+    backup_path.mkdir()
+
+    file_ids = ["ab" + "1" * 38, "cd" + "2" * 38]
+    for file_id in file_ids:
+        source_path = backup_path / file_id[:2] / file_id
+        source_path.parent.mkdir()
+        source_path.write_bytes(b"encrypted")
+
+    cursor = mocker.MagicMock()
+    cursor.__iter__.return_value = iter(
+        (file_id, "Domain", file_id, b"plist") for file_id in file_ids
+    )
+    cursor_context = mocker.MagicMock()
+    cursor_context.__enter__.return_value = cursor
+
+    barrier = threading.Barrier(2)
+    backup = mocker.MagicMock()
+    backup.manifest_db_cursor.return_value = cursor_context
+
+    def extract_file_by_id(*, file_id, output_filename, **kwargs):
+        barrier.wait(timeout=5)
+        Path(output_filename).write_bytes(file_id.encode())
+
+    backup.extract_file_by_id.side_effect = extract_file_by_id
+    decryptor = DecryptBackup(str(backup_path), str(destination), max_workers=2)
+    decryptor._backup = backup
+
+    decryptor.process_backup()
+
+    for file_id in file_ids:
+        assert (destination / file_id[:2] / file_id).read_bytes() == file_id.encode()
+
+
+def test_process_backup_logs_worker_errors(mocker, tmp_path, caplog):
+    backup_path = tmp_path / "backup"
+    destination = tmp_path / "destination"
+    backup_path.mkdir()
+    file_id = "ef" + "3" * 38
+    source_path = backup_path / file_id[:2] / file_id
+    source_path.parent.mkdir()
+    source_path.write_bytes(b"encrypted")
+
+    cursor = mocker.MagicMock()
+    cursor.__iter__.return_value = iter([(file_id, "Domain", "failing-file", b"plist")])
+    cursor_context = mocker.MagicMock()
+    cursor_context.__enter__.return_value = cursor
+
+    backup = mocker.MagicMock()
+    backup.manifest_db_cursor.return_value = cursor_context
+    backup.extract_file_by_id.side_effect = ValueError("broken file")
+    decryptor = DecryptBackup(str(backup_path), str(destination))
+    decryptor._backup = backup
+
+    with caplog.at_level(logging.ERROR, logger="mvt.ios.decrypt"):
+        decryptor.process_backup()
+
+    assert "Failed to decrypt file failing-file: broken file" in caplog.text

uv.lock

@@ -624,16 +624,15 @@ wheels = [
 ]
 
 [[package]]
-name = "iosbackup"
-version = "0.9.925"
+name = "iphone-backup-decrypt"
+version = "0.9.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "nskeyedunarchiver" },
     { name = "pycryptodome" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/db/b8/4cd52322deceb942b9e18b127d45d112c2f7a3ec7821ab528659d4f04275/iOSbackup-0.9.925.tar.gz", hash = "sha256:33545a9249e5b3faaadf1ee782fe6bdfcdb70fae0defba1acee336a65f93d1ca", size = 25228, upload-time = "2022-10-16T01:02:46.474Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/6f/e7/bcdacdec21d628122ba240e7f742ab2175149e58672be63af55ff37a0f28/iphone_backup_decrypt-0.9.0.tar.gz", hash = "sha256:13b18fef3c8e3af627914f8c1a429bbc5555dfb0505239ba49efe99984cc0c96", size = 16125, upload-time = "2024-09-18T15:50:12.179Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/e0/4e/8da5fdc2df642080c79f128b9412a6f33768a610a58d59fbdb7b4d019364/iOSbackup-0.9.925-py3-none-any.whl", hash = "sha256:348edab2b82499d55c17c4bfe02fc6ae7915a2cc8da2728893ed1e9ae61bcef3", size = 18326, upload-time = "2022-10-16T01:02:44.164Z" },
+    { url = "https://files.pythonhosted.org/packages/b8/94/64a31be93f72e0a254bde68e4cf7d24aef37a0a985754a197fa1b028a665/iphone_backup_decrypt-0.9.0-py3-none-any.whl", hash = "sha256:55b5adfafac757f58aa6444b83a4cc2c20cdd699c6ff1d2f4b549936a5dad92c", size = 15767, upload-time = "2024-09-18T15:50:10.537Z" },
 ]
 
 [[package]]
@@ -1022,11 +1021,12 @@ dependencies = [
     { name = "betterproto2" },
     { name = "click" },
     { name = "cryptography" },
-    { name = "iosbackup" },
+    { name = "iphone-backup-decrypt" },
     { name = "libusb1" },
     { name = "nskeyedunarchiver" },
     { name = "packaging" },
     { name = "pyahocorasick" },
+    { name = "pycryptodome" },
     { name = "pydantic" },
     { name = "pydantic-settings" },
     { name = "python-dateutil" },
@@ -1068,11 +1068,12 @@ requires-dist = [
     { name = "betterproto2", specifier = "==0.10.0" },
     { name = "click", specifier = "==8.4.2" },
     { name = "cryptography", specifier = "==50.0.0" },
-    { name = "iosbackup", specifier = "==0.9.925" },
+    { name = "iphone-backup-decrypt", specifier = "==0.9.0" },
     { name = "libusb1", specifier = "==3.4.0" },
     { name = "nskeyedunarchiver", specifier = "==1.5.2" },
     { name = "packaging", specifier = "==26.3" },
     { name = "pyahocorasick", specifier = "==2.3.1" },
+    { name = "pycryptodome", specifier = ">=3.20.0" },
     { name = "pydantic", specifier = "==2.13.4" },
     { name = "pydantic-settings", specifier = "==2.15.0" },
     { name = "python-dateutil", specifier = "==2.9.0.post0" },