A super simple Password Strength Estimator
Written in 👑 Nim language

nimble install blackpaper

API reference

😍 Key Features

• 🚀 Fast and efficient implementation in Nim language
• 👌 Estimate on length • character diversity • repetition • sequential patterns • leet substitutions
• 🔎 Optional common password list for penalizing known weak/common passwords
• 🚀 SIMD-accelerated fuzzy matching for fast detection using pkg/floof
• 💪 Framework-agnostic, can be used in any Nim project

Note

This package does not provide a common password list. You can find one online and feed it to the estimator.

Examples

Here is an example password strength estimation using Blackpaper without a common password list:

import blackpaper

let res = passwordStrength("P@ssw0rd123")
echo "Score: ", res.score
echo "Strength: ", res.strength       # Weak
echo "Reason: ", res.reason           # TooPredictable

And here is an example with a common password list.

import blackpaper

let commonPasswords = @["password", "123456", "qwerty", "abc123", "P@ssw0rd123",
                      "word", "fox", "jumped", "over", "lazy", "dogs"]

for pwd in ["Word Fox Jumped Over", "P@ssw0rd", "3s4F5j~@!1Z6woG"]:
  let res = passwordStrength(pwd, commonPasswords)
  echo "Password: ", pwd
  echo "Score: ", res.score
  echo "Strength: ", res.strength
  echo "Reason: ", res.reason
  echo "-----------------------------"

❤ Contributions & Support

• 🐛 Found a bug? Create a new Issue
• 👋 Wanna help? Fork it!
• 😎 Get €20 in cloud credits from Hetzner

🎩 License

MIT license. Made by Humans from OpenPeeps.
Copyright OpenPeeps & Contributors — All rights reserved.