red-leicester-string

It's stringcheese in Rust :)

There are a number of optimisations:

• Strides (i.e. searching every other byte etc) are handled with Rust's strided crate so occur no memory allocation overhead
• Files are mmap-ed in
• Strides of the file are searched in parallel

Over all this means much larger files can be searched and faster as the aho-corasick automaton built is shared between all threads. This is only possible due to some excellent library design from Andrew Gallant, and the Rust crate eco system.

Installation

You can install the stringcheese binary via cargo install stringcheese.

Examples

For example it should find flag{in_the_readme :)} when run on this file It can also find flags backwards: }!sdrawkcab m'i{galf Strides of the file are also supported:

• 2: ufrlmaPgA{GsgtCrdiSpLerdG}
• 5: }qSgvySyhbeOYqNpNGwsiuFOmrVrSAtJdqpsLrWO{qJJQgSRnLaLVuolnRRrfFfja

By default strides up to 32 are searched.

All of the encodings of the original stringcheese tool are now suppored. Some examples:

• base64: ZmxhZ3t3ZSBkbyBhIGxpdHRsZSBlbmNvZGluZ30=
• ROT47: MSHNb0lT PU 96; y|fffd

Additionally there is --strict which will prevent partial flags from being output, i.e. flag{ should not be output on its own

AI notice

This codebase is entirely hand written, I do not use AI and I would encourage you not to as well :)