paspio

paspio, short for pasvorta entropio, is a password entropy calculator/library.

Please refrain from using this as a sole measure of password strength, it should be used in conjuction with other security tools, e.g. cracklib-check.

Usage

If you're intending on using paspio as a program, run the following in your terminal:

Example #1:

```bash

Pass one or more passwords to paspio to get their entropy

paspio "liuLe9ohjub8hu2ie" ```

Example #2:

```bash

Pipe pwgen-generated passwords to paspio

pwgen -sync 20 1 | paspio ```

If you're wishing to use it in your own project(s), i.e. as a library, then add the following to your project's Cargo.toml:

paspio = "0.3"

Installation

Cargo

cargo install paspio

Arch User Repository

git clone https://aur.archlinux.org/paspio-git.git cd paspio-git makepkg -si

Build from source

git clone https://github.com/grtcdr/paspio cd paspio cargo build --release

FAQ

What is this tool useful for?

Ever wanted to verify the strength of your passwords, but felt slightly uncomfortable doing so over the internet?

If you answered yes, then you're looking at the right tool. After all, it's the only reason I created it; to check how random my passwords are, but locally.

What is entropy?

Entropy measures how unpredictable a password is.

How does this calculator calculate entropy?

bash Entropy = L * log2(R)

Where: - L is the length of the password. - R is the size of the pool of characters the password exists in.

Pool? What pool?

| Pool | Elements | Pool size | Notes | | -----: | :------ | :-------: | :---- | | Lowercase latin letters | [a-z] | 26 | | | Uppercase latin letters | [A-Z] | 26 | | | Digits | [0-9] | 10 | | | Symbols | !"#$%&'()*+,-./:;<=>?@[]^_`{}~ | 32 | Whitespace and pipe symbol included |