mirror of
https://github.com/mvt-project/mvt.git
synced 2026-07-04 20:17:51 +02:00
Janik Besendorf
130 lines
3.8 KiB
Markdown
130 lines
3.8 KiB
Markdown
# Development
|
|
|
|
The Mobile Verification Toolkit team welcomes contributions of new forensic modules or other contributions which help improve the software.
|
|
|
|
## Local environment
|
|
|
|
MVT uses `uv` for dependency management. To install the project and development dependencies from the locked environment, run:
|
|
|
|
```bash
|
|
make install
|
|
```
|
|
|
|
## Testing
|
|
|
|
MVT uses `pytest` for unit and integration tests. Code style consistency is maintained with `ruff` and `mypy`. All can
|
|
be run automatically with:
|
|
|
|
```bash
|
|
make check
|
|
```
|
|
|
|
Run these tests before making new commits or opening pull requests.
|
|
|
|
## Module dependencies
|
|
|
|
Modules can require other modules to run first by declaring their classes in
|
|
`dependencies`. The command runner uses a stable topological ordering, so the
|
|
existing module list order is preserved wherever dependency constraints allow.
|
|
|
|
```python
|
|
class DependentModule(MVTModule):
|
|
dependencies = (PrerequisiteModule,)
|
|
|
|
def run(self):
|
|
prerequisite_results = self.get_dependency_results(PrerequisiteModule)
|
|
```
|
|
|
|
Selecting a single module also runs its transitive dependencies. If a dependency
|
|
is unavailable or the dependency graph contains a cycle, the command logs a
|
|
warning and does not run any modules.
|
|
|
|
## Custom modules
|
|
|
|
Module-running `check-*` commands can load custom modules from Python files that
|
|
are not installed as part of MVT. Load one file with:
|
|
|
|
```bash
|
|
mvt-ios check-backup --load-module ./example_module.py --output ./out ./backup
|
|
```
|
|
|
|
You can also load a folder. MVT loads non-hidden top-level `*.py` files in
|
|
sorted order and skips `__init__.py`:
|
|
|
|
```bash
|
|
mvt-ios check-fs --load-module ./custom_modules ./filesystem-dump
|
|
```
|
|
|
|
Set `MVT_CUSTOM_MODULES` to load a folder for every module-running command. This
|
|
folder is loaded before any `--load-module` path:
|
|
|
|
```bash
|
|
MVT_CUSTOM_MODULES=./custom_modules mvt-android check-bugreport ./bugreport.zip
|
|
```
|
|
|
|
Custom modules are normal `MVTModule` subclasses:
|
|
|
|
```python
|
|
from mvt.common.module import MVTModule
|
|
|
|
|
|
class ExampleCustomModule(MVTModule):
|
|
supported_commands = (("ios", "check-backup"), ("ios", "check-fs"))
|
|
slug = "example_custom_module"
|
|
|
|
def run(self):
|
|
self.results = [{"message": "custom module ran"}]
|
|
|
|
def check_indicators(self):
|
|
pass
|
|
|
|
def serialize(self, result):
|
|
return None
|
|
```
|
|
|
|
Use `supported_commands` to restrict a module to specific platform/command
|
|
pairs. Missing or empty `supported_commands` means the module is available to
|
|
all commands, which keeps older modules compatible. Supported pairs are:
|
|
|
|
```python
|
|
("ios", "check-backup")
|
|
("ios", "check-fs")
|
|
("ios", "check-iocs")
|
|
("android", "check-backup")
|
|
("android", "check-bugreport")
|
|
("android", "check-androidqf")
|
|
("android", "check-intrusion-logs")
|
|
("android", "check-iocs")
|
|
```
|
|
|
|
Custom modules can depend on existing MVT module classes. Dependencies are
|
|
resolved with the same ordering logic as built-in modules, and custom modules
|
|
are appended after built-ins before ordering:
|
|
|
|
```python
|
|
from mvt.common.module import MVTModule
|
|
from mvt.ios.modules.backup.manifest import Manifest
|
|
|
|
|
|
class DependentCustomModule(MVTModule):
|
|
supported_commands = (("ios", "check-backup"),)
|
|
dependencies = (Manifest,)
|
|
|
|
def run(self):
|
|
manifest_results = self.get_dependency_results(Manifest)
|
|
self.results = [{"manifest_entries": len(manifest_results)}]
|
|
```
|
|
|
|
## Profiling
|
|
|
|
Some MVT modules extract and process significant amounts of data during the analysis process or while checking results against known indicators. Care must be
|
|
take to avoid inefficient code paths as we add new modules.
|
|
|
|
MVT modules can be profiled with Python built-in `cProfile` by setting the `MVT_PROFILE` environment variable.
|
|
|
|
```bash
|
|
MVT_PROFILE=1 dev/mvt-ios check-backup test_backup
|
|
```
|
|
|
|
Open an issue or PR if you are encountering significant performance issues when analyzing a device with MVT.
|