git clone https://depp.brause.cc/plucky.git
A toolchain to turn a Digistump Digispark device into a cheap USB Rubber Ducky knock-off with a minimum amount of fuss. This wouldn't have been possible without the following projects:
- The official USB Rubber Ducky encoder defining the Duckyscript language: https://github.com/hak5darren/USB-Rubber-Ducky (unknown license)
- The duck2spark converter showing how the encoded payload translates to equivalent C++ code: https://github.com/mame82/duck2spark (unknown license)
- Various Digispark projects written in C using Makefiles: https://github.com/yuvadm/digispark-projects (GPL3)
- A mapping of Linux key names to USB codes: https://gist.github.com/MightyPork/6da26e382a7ad91b5496ee55fdc73db2 (Public Domain)
- The V-USB library: https://www.obdev.at/products/vusb/index.html (GPL2/3)
- Digistump's Arduino libraries: https://github.com/digistump/DigistumpArduino (unknown license)
chicken-install inside the project directory.
Run the following inside the project directory:
plucky -i example.duck -l de -o keyboard.c make make deploy
Duckyscript is a language resembling BASIC. Every line contains an all-caps command followed by arguments. The following commands are supported:
// <comment>: Ignore the rest of the line.
DEFAULT_DELAY <number>: Set the default delay between execution of commands, measured in milliseconds. This is mostly useful for debugging.
DELAY <number>: Wait for the specified amount of milliseconds.
STRING <text>: Type the specified text, using modifiers when needed. Note that this depends on a correctly set keyboard layout.
STRING_DELAY <number> <text>: Like the
STRINGcommand, but waiting the specified delay in milliseconds between each letter.
REPEAT <number>: Repeat the previous non-repeat command the specified number of times.
<modifier>... <key>: Type the specified shortcut by pressing the key while holding the specified modifiers. Modifiers are all-caps and may contain underscores and numbers. Keys may be all-caps (like
SPACE), but also be a number or letter.
<key>: Types the key, specified by its all-caps name which may contain underscores and numbers. Use
STRINGfor other keys.
For compatibility reasons with existing Duckyscript payloads, the following behavior is supported:
DEFAULTDELAYis considered an alias for the
- Certain shortcuts may use dashes instead of a space as separator:
Not everyone is using an US layout on their keyboard. To make sure
the correct keys are typed, you can pick an alternative keyboard
-l argument allows you to specify the name of a
built-in layout or path to a layout file. Use
print a list of built-in layouts or check the
The format is a list of S-Expressions, with each S-Expression describing how a character maps to a sequence of shortcuts. Each shortcut can either consist of a symbol (representing a key without modifier) or a list of symbols (representing a key with modifiers). This structure allows typing characters by using dead keys and more.
Incompatibilities and other deficiencies
- Currently only German and American keyboard layouts are supported.
- The interaction between the
DELAYcommand is still unclear to me and most likely incorrect.
- Handling of the
REPEATcommand is most likely different from the original.
- Shortcuts only support pressing a regular key with optional modifiers whereas the original supports modifier-only shortcuts as well.
- More can be found on the bug tracker in due time.