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技术解读

以下内容由 GitRead 中文社区 编辑团队基于项目 README 与官方资料整理, 结合中文开发者的常见使用场景补充技术选型建议。具体以项目官方文档为准。

项目背景与痛点

Universal Radio Hacker(URH)是一个可在多种操作系统上运行的无线协议逆向工具,由德国汉堡的独立开发者Johannes Pohl维护。它允许用户捕获和分析各种无线协议数据,进行协议逆向工程,从而更好地理解无线通信设备的内部工作原理。在当今无线协议变得复杂且多样化的情况下,URH的价值显而易见。在智能家居、工业自动化等场景中,面对未知或不够明晰的无线协议,URH可以大大降低研发成本,加速产品上市时间。

技术核心揭秘

URH的设计初衷是为了提供一个集成了信号捕获和分析功能的视觉工具,它采用多种编程语言开发,其中Python为主要开发语言,整套系统依赖于C++和Qt框架来提供必要的底层支持。

核心架构图如下:

graph LR A[信号输入] --> B[时域分析] B --> C{"傅里叶变换?"} C -->|"是"| D[频域分析] C -->|"否"| E[列振幅] D --> F{"波特率检测?"} F -->|"是"| G[译码] F -->|"否"| H[自动检测] G --> I[数据包分析] H --> I I --> J{"模式匹配?"} J -->|"是"| K[高级分析] J -->|"否"| L[简单分析]

通过时域分析和傅里叶变换,URH能够将输入的信号分解为多种频率成分,完成信号的频域分析。随后结合手动或自动的波特率测试,进一步对信号进行译码。在完成了初步的数据包分析后,URH引入模式匹配算法,通过这部分的处理可以更清楚地解析信号被编码的方式。

功能亮点与差异

相比同类工具,URH的亮点在于其多模态的数据处理能力和高度的交互界面。它的数据处理流程涵盖了信号的捕获、分析和解析,提供了一个信息丰富的接口,让用户可以直接在界面上看到信号的细节。

此外,URH内置了一套强大的模式匹配和模板编辑器,用户可以基于这一功能更深入地理解复杂的无线电协议。通过这些独特的设计,URH成为了一个强大的研究工具,适用于从初级信号探究到高级信号逆向工程的广泛场景。

应用场景与落地建议

在实际生产环境中使用URH需要关注一些细节。首先,确保硬件支持,URH仅支持特定范围内的硬件,包括流行的HackRF, RTL-SDR等设备。其次,信号捕获涉及的权限问题,可能需要用户具备更高的系统权限以操作硬件。

适合的业务场景包括但不限于非法频率监测、协议逆向工程、安全测试以及智能家居和物联网设备的研发等场景中。使用URH的过程中,确保对捕获到的信号进行合理的管理和分析,可以大大提高项目质量和效率。

综合评价

Universal Radio Hacker是一款强大且专业的无线协议逆向工具,具有清晰的设计思路,其强大且高度交互的图形界面显现出在同类工具中的优势。URH非常适用于需要深入研究无线通信协议的开发者。然而,使用URH可能需要用户对信号处理有一定的理解以及适当的软硬件支持,这可能成为某些用户入门的障碍。此外,随着技术的进步,部分硬件设备可能会出现兼容性问题,这些都需要进一步的优化和适应。总体而言,URH在无线逆向工程领域属于相当成熟且具有重要影响力的工具,值得无线通信领域的专业人员深入研究。

关于

GitHub 原始描述(英文)

Universal Radio Hacker: Investigate Wireless Protocols Like A Boss

描述取自 GitHub 官方 API,保持仓库作者书写的原文。

简要分析

热度分
14729
价值分
7877
活跃状态
归档

语言占比

C
Cython
Dockerfile
Inno Setup
Python
Shell

Release

README

URH image

CI Code style: black PyPI version Packaging status Blackhat Arsenal 2017 Blackhat Arsenal 2018

The Universal Radio Hacker (URH) is a complete suite for wireless protocol investigation with native support for many common Software Defined Radios. URH allows easy demodulation of signals combined with an automatic detection of modulation parameters making it a breeze to identify the bits and bytes that fly over the air. As data often gets encoded before transmission, URH offers customizable decodings to crack even sophisticated encodings like CC1101 data whitening. When it comes to protocol reverse-engineering, URH is helpful in two ways. You can either manually assign protocol fields and message types or let URH automatically infer protocol fields with a rule-based intelligence. Finally, URH entails a fuzzing component aimed at stateless protocols and a simulation environment for stateful attacks.

Getting started

In order to get started

If you like URH, please :star: this repository and join our Slack channel. We appreciate your support!

Citing URH

We encourage researchers working with URH to cite this WOOT’18 paper or directly use the following BibTeX entry.

URH BibTeX entry for your research paper
@inproceedings {220562,
author = {Johannes Pohl and Andreas Noack},
title = {Universal Radio Hacker: A Suite for Analyzing and Attacking Stateful Wireless Protocols},
booktitle = {12th {USENIX} Workshop on Offensive Technologies ({WOOT} 18)},
year = {2018},
address = {Baltimore, MD},
url = {https://www.usenix.org/conference/woot18/presentation/pohl},
publisher = {{USENIX} Association},
}

Installation

URH runs on Windows, Linux and macOS. See below for OS specific installation instructions.

Windows

On Windows, URH can be installed with its Installer. No further dependencies are required.

If you get an error about missing api-ms-win-crt-runtime-l1-1-0.dll, run Windows Update or directly install KB2999226.

Linux

Installation with pipx

URH is available on PyPi so you can install it, for example, with pipx:

pipx install urh

This is the recommended way to install URH on Linux because it comes with all native extensions precompiled.

In order to access your SDR as non-root user, install the according udev rules. You can find them in the wiki.

Install via Package Manager

URH is included in the repositories of many linux distributions such as Arch Linux, Gentoo, Fedora, openSUSE or NixOS. There is also a package for FreeBSD. If available, simply use your package manager to install URH.

Note: For native support, you must install the according -dev package(s) of your SDR(s) such as hackrf-dev before installing URH.

Docker Images

The official URH docker image is available here. It has all native backends included and ready to operate.

macOS

Using DMG

It is recommended to use at least macOS 13 when using the DMG available here.

With brew

URH is available as a homebrew formula so you can install it with

brew install urh

Running from source (OS-agnostic)

Without installation

To execute the Universal Radio Hacker without installation, just run:

git clone https://github.com/jopohl/urh/
cd urh/src/urh
PYTHONPATH=.. ./main.py

Note, before first usage the C++ extensions will be built.

Installing from source

To install URH from source you need to have python-setuptools installed. You can get them with python3 -m pip install setuptools. Once the setuptools are installed execute:

git clone https://github.com/jopohl/urh/
cd urh
python setup.py install

And start the application by typing urh in a terminal.

Articles

Hacking stuff with URH

General presentations and tutorials on URH

External decodings

See wiki for a list of external decodings provided by our community! Thanks for that!

Screenshots

Get the data out of raw signals

Interpretation phase

Keep an overview even on complex protocols

Analysis phase

Record and send signals

Record

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