tropy - command line entropy viewer

What is tropy?

The tropy commandline tool takes bytes or input from std in and calculates the Shannon entropy then it display them colour coded in the terminal.

Installing

With Rust installed run: shell cargo install tropy

Using the tropy command line tool

```shell

for example to get the entropy of the tropy binary

in chunks of 1024 bytes (the default value)

tropy target/release/tropy --bytes 1024 ``` will yield something like this:

```shell

or read data from stdin and get the raw entropy as csv

cat /dev/urandom | tropy - --csv ``` #

Using tropy as a library

Add this to your Cargo.toml: ```toml

[dependencies]

. tropy = { version = "0.1.0", default_features = false } .

And to use the entropy calculator in your program/library add this: rust use std::io::Write; use tropy::Calculator;

let mut calc = Calculator::new();

// write some bytes calc.write(&[0u8]).unwrap(); calc.write(&[1u8]).unwrap();

// calculate the entropy over the accumulated state // and reset the calculator let e = calc.entropy(); assert_eq!(e,1.0);

```

License

Mozilla Public License 2.0