178 lines
6.1 KiB
Plaintext
178 lines
6.1 KiB
Plaintext
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# Overview
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A simple way to check that password strength of a certain passphrase. A password strength checker based from [Javascript RegEx](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions).
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[](https://travis-ci.org/deanilvincent/check-password-strength)
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[](https://img.shields.io/npm/dm/check-password-strength.svg)
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[](https://img.shields.io/npm/dt/check-password-strength.svg)
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[DEMO here](https://check-password-strength.netlify.app/)
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## Installation
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`npm i check-password-strength --save`
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## Setup & Basic Usage
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```
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const passwordStrength = require('check-password-strength')
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console.log(passwordStrength('asdfasdf').value)
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// Too weak (It will return Too weak if the value doesn't match the RegEx conditions)
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console.log(passwordStrength('asdf1234').value)
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// Weak
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console.log(passwordStrength('Asd1234!').value)
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// Medium
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console.log(passwordStrength('A@2asdF2020!!*').value)
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// Strong
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```
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## Migration from 1.x.x to 2.0.0
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```
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// 1.x.x
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const whateEverYourFunctionNameWasBefore = require("./index");
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// 'contains' attribute of the response object format was
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response.contains = [{'message': 'lowercase'}, ...]
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```
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```
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// 2.0.0
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const { passwordStrength : whateEverYourFunctionNameWasBefore } = require("./index");
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// 'contains' attribute of the response object format is now
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response.contains = ['lowercase', ...]
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```
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## Additional Info
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### Object Result
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| Property| Desc. |
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| -- | -- |
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| id | **0** = Too weak, **1** = Weak & **2** = Medium, **3** = Strong |
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| value | Too weak, Weak, Medium & Strong |
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| contains | lowercase, uppercase, symbol and/or number |
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| length | length of the password |
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### Password Length Default Options
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| Name | Mininum Diversity | Mininum Length |
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| -- | -- | -- |
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| Too weak | 0 | 0 |
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| Weak | 2 | 6 |
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| Medium | 4 | 8 |
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| Strong | 4 | 10 |
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```
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console.log(passwordStrength('@Sdfasd2020!@#$'))
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// output
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{
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"id": 1,
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"value": "Strong",
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"contains": ['lowercase', 'uppercase', 'symbol', 'number'],
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"length": 15
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}
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```
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### Default Options
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the default options can be required:
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```
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const { defaultOptions } = require("./index");
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```
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default options:
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```
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[
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{
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id: 0,
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value: "Too weak",
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minDiversity: 0,
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minLength: 0
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},
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{
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id: 1,
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value: "Weak",
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minDiversity: 2,
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minLength: 6
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},
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{
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id: 2,
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value: "Medium",
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minDiversity: 4,
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minLength: 8
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},
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{
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id: 3,
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value: "Strong",
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minDiversity: 4,
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minLength: 10
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}
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]
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```
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To override the default options, simply pass your custom array as the second argument:
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- id: correspond to the return id attribute.
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- value: correspond to the return value attribute.
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- minDiversity: between 0 and 4, correspond to the minimum of different criterias ('lowercase', 'uppercase', 'symbol', 'number') that should be met to pass the password strength
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- minLength: minimum length of the password that should be met to pass the password strength
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The minDiversity and minLength parameters of the first element cannot be overriden (set to 0 at the beginning of the method). Therefore, the first element should always correspond to a "too weak" option.
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```
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passwordStrength('myPassword', yourCustomOptions)
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```
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### RegEx
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**Strong**
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`^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{10,})`
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**Medium Password RegEx used:**
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`^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{8,})`
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**Weak Password RegEx used:**
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`^((?=.*[a-z])(?=.*[A-Z]))|((?=.*[a-z])(?=.*[0-9]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[A-Z])(?=.*[!@#\$%\^&\*])|((?=.*[a-z])(?=.*[!@#\$%\^&\*])|((?=.*[0-9])(?=.*[!@#\$%\^&\*]))(?=.{6,})"`
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|RegEx| Desc. |
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|--|--|
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| ^ | The password string will start this way |
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| (?=.*[a-z]) | The string must contain at least 1 lowercase alphabetical character |
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|(?=.*[A-Z]) | The string must contain at least 1 uppercase alphabetical character |
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|(?=.*[0-9]) | The string must contain at least 1 numeric character |
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|(?=._[!@#\$%\^&_]) | The string must contain at least one special character, but we are escaping reserved RegEx characters to avoid conflict |
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| (?=.{10,}) | The string must be eight characters or longer for Strong strength |
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| (?=.{8,}) | The string must be eight characters or longer for Medium strength |
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| (?=.{6,}) | Mininum of 6 characters for Weak strength |
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## Other resources
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##### For .NET Project
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If you're working with .net core project, I've created a simple nuget package with same RegEx strings to validate a password strength.
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You can easily install via Nuget Package Manager or .NET CLI ([Check.Password.Strength](https://github.com/deanilvincent/Check.Password.Strength)). This package uses Regular Expression `new Regex()` derives from `System.Text.RegularExpressions`. You can use this especially if you want to validate the passcode strength on backend services or web apis of your project.
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##### Other NPM RegEx validator
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I also made another NPM package ([hey-regex](https://www.npmjs.com/package/hey-regex)) that checks common inputs like numbers (whole number and decimal), alpha numeric, email and url. This package only returns `true` or `false` based from the selected function (with RegEx `.test()` inside).
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Reference [blog](https://www.thepolyglotdeveloper.com/2015/05/use-regex-to-test-password-strength-in-javascript/).
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### Contribute
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Feel free to clone or fork this project: `https://github.com/deanilvincent/check-password-strength.git`
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Contributions & pull requests are welcome!
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I'll be glad if you give this project a ★ on [Github](https://github.com/deanilvincent/check-password-strength) :)
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***
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Kudos to [@Ennoriel](https://github.com/Ennoriel) and his efforts for making v2.x.x possible!
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### License
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This project is licensed under the MIT License - see the [LICENSE.md](https://github.com/deanilvincent/check-password-strength/blob/master/LICENSE.md/) file for details.
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