npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

guardly

v1.0.15

Published

Security helper methods for front-end development

Downloads

84

Readme

Guardly

Guardly is a JavaScript/TypeScript library that provides a suite of security helper methods designed to enhance the security of web applications. It includes methods for preventing common web vulnerabilities such as XSS, CSRF, SQL Injection, LDAP Injection, HTTP Parameter Pollution, and more.

Features

  • XSS Prevention: Escape and sanitise HTML input.
  • CSRF Prevention: Generate and set CSRF tokens.
  • HTTPS Enforcement: Ensure HTTPS protocol usage.
  • SSL/TLS Validation: Validate SSL/TLS configurations.
  • CSP Setting: Set Content-Security-Policy meta tags.
  • Command Injection Prevention: Validate allowed commands.
  • SQL Injection Prevention: Escape SQL special characters.
  • LDAP Injection Prevention: Escape LDAP special characters.
  • HTTP Verb Tampering Prevention: Validate HTTP methods.
  • Header Injection Prevention: sanitise headers.
  • XML Injection Prevention: sanitise XML input.
  • SRI for CDN: Add Subresource Integrity (SRI) to CDN scripts.
  • HTTP Parameter Pollution Prevention: sanitise URL parameters.
  • Input Validation: Validate and sanitise user inputs.

Installation

Install Guardly via npm:

npm install guardly

Run

See the RUNBOOK file for details.

Usage


Import the library into your project:

const {
    validateCommand,
    generateCSRFToken,
    escapeHTML,
    escapeSQL,
    enforceHTTPS,
    validateSSLCertificate,
    addSRItoCDNScript,
    setCSP,
    isValidInput,
    sanitiseInput,
    escapeLDAP,
    sanitiseParameters,
    validateHTTPMethod,
    sanitiseHeader,
    sanitiseXML,
    setCSRFToken,
    sanitiseHTML
} = require('guardly');

Examples


XSS Prevention

const input = '<div>Test & "escape"</div>';
const escapedOutput = escapeHTML(input); // '&lt;div&gt;Test &amp; &quot;escape&quot;&lt;/div&gt;'

const htmlInput = '<script>alert("XSS")</script><div>Safe</div>';
const sanitisedOutput = sanitiseHTML(htmlInput); // '<div>Safe</div>'

CSRF Prevention

const token = generateCSRFToken();
console.log(token); // Outputs a 24 character token

document.body.innerHTML = '<form id="form"><input type="hidden" name="_csrf" value=""></form>';
const form = document.getElementById('form');
setCSRFToken(form); // Sets the CSRF token in the form and in the cookie

HTTPS Enforcement

enforceHTTPS(); // Redirects to HTTPS if the current protocol is HTTP

SSL/TLS Validation

const url = 'https://example.com';
validateSSLCertificate(url); // Validates SSL/TLS configuration for the provided URL

CSP Setting

setCSP({
    'default-src': "'self'",
    'script-src': "'self' https://trusted.cdn.com",
    'style-src': "'self' https://trusted.styles.com",
    'img-src': "'self' https://trusted.images.com"
});
// Sets a Content-Security-Policy meta tag

Command Injection Prevention

const allowedCommands = ["ls", "ping", "whoami"];
const command = "ls -la";
const isValid = validateCommand(command, allowedCommands); // true

SQL Injection Prevention

const userInput = "' OR '1'='1";
const escapedInput = escapeSQL(userInput); // "\\' OR \\'1\\'=\\'1"

LDAP Injection Prevention

const ldapInput = 'admin*()\\|';
const escapedLDAPInput = escapeLDAP(ldapInput); // 'admin\\2a\\28\\29\\5c\\7c'

HTTP Verb Tampering Prevention

const allowedMethods = ["GET", "POST", "PUT", "DELETE"];
const method = "POST";
const isMethodValid = validateHTTPMethod(method, allowedMethods); // true

Header Injection Prevention

const header = "Content-Type: text/html\r\nContent-Length: 0";
const sanitisedHeader = sanitiseHeader(header); // 'Content-Type: text/htmlContent-Length: 0'

XML Injection Prevention

const xmlInput = '<user><name>John & Doe</name></user>';
const sanitisedXML = sanitiseXML(xmlInput); // '&lt;user&gt;&lt;name&gt;John &amp; Doe&lt;/name&gt;&lt;/user&gt;'

SRI for CDN

addSRItoCDNScript('https://cdn.example.com/library.js', 'sha384-oqVuAfXRKap7fdgcCY5uykM6+R9GqQ8K/ux5J3t3PEaNYCpAnG5P1FZCOm/S6Sni');
// Adds a script tag with SRI attributes to the document head

HTTP Parameter Pollution Prevention

const params = new URLSearchParams("id=123&id=456");
const sanitisedParams = sanitiseParameters(params);
console.log(sanitisedParams.toString()); // 'id=123'

Input Validation

const userInput = '<script>alert("XSS")</script>Hello';
const sanitised = sanitiseInput(userInput);
console.log(sanitised); // '&lt;script&gt;alert("XSS")&lt;/script&gt;Hello'

const safeInput = 'Hello, World!';
const unsafeInput = '<script>alert("XSS")</script>';
console.log(isValidInput(safeInput)); // true
console.log(isValidInput(unsafeInput)); // false

Running Tests

To run the tests for Guardly, use the following command:

npm test

License

This project is licensed under the MIT License - see the LICENSE file for details.

guardly