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79 lines
2.5 KiB
Markdown
79 lines
2.5 KiB
Markdown
<h1 align="center">
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Brute Force OOK using <a href="https://flipperzero.one">Flipper Zero</a>
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</h1>
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Brute force subghz fixed codes using flipper zero, initially inspired by [CAMEbruteforcer](https://github.com/BitcoinRaven/CAMEbruteforcer)
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This repo aims to collect as many brute force files as possible, so if you can or want to contribute you are more than welcome to do so!
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## How it works
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This repo contains a python script to generate bruteforce `.sub` files for subghz protocols that use fixed OOK codes. Inside the script it is also possible to specify your own protocol in case it's not present.
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To generate all the files simply run:
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```bash
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python3 flipperzero-bruteforce.py
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```
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It will generate bruteforce files for all the specified protocols organized in many folders with the following structure:
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```
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sub_files/
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└── PROTOCOL_NAME
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├── SPLIT_FACTOR
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│ ├── 000.sub
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│ ├── ...
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│ └── NNN.sub
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└── debruijn.sub
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```
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For each protocol there are 6 sub folders, containing 1, 2, 4, 8, 16 and 32 files, `SPLIT_FACTOR` indicates the number of keys per `.sub` file. This is useful when trying to get a close guess to the key.
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## Currently supported protocols
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Right now the protocols supported are:
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- CAME
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- NICE
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- PT-2240
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- PT-2262
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More info about them can be found [here](https://phreakerclub.com/447)
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### Adding a protocol
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Adding a protocol is very straight forward, inside the script protocols are defined at the bottom, inside the protocol list:
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```python
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protocols = [
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Protocol("CAME", 12, {"0": "-320 640 ", "1": "-640 320 "}, "-11520 320 "),
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Protocol("NICE", 12, {"0": "-700 1400 ", "1": "-1400 700 "}, "-25200 700 "),
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Protocol("8bit", 8, {"0": "200 -400 ", "1": "400 -200 "}), # generic 8 bit protocol
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...
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]
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```
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A protocol is defined by a few parameters passed to the constructor in the following order:
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- name: the name of the protocol
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- n_bits: the number of bits for a single key
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- transposition_table: how 0s and 1s are translated into flipper subghz `.sub` language
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- pilot_period: aka preamble, a recurring pattern at the beginning of each key, defaults to `None`
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- frequency: working frequency, defaults to 433.92
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# Timing
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To compute the time it takes to perform a bruteforce attack, we need to sum the time it takes to send each code:
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```
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(pilot_period + n_bits * bit_period) * repetition * 2^n_bits
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```
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For example, computing this for CAME turns out to be:
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```
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[(11520 + 320) + 12 * (320 + 640)] * 3 * 2^12 = 287.047.680 microseconds ~ 287 seconds
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```
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