🔒 SSLko

SSLko is a lightweight JavaScript library for retrieving SSL/TLS certificate details, including validity and expiration information.

📦 Installation

You can install SSLko using npm, yarn, pnpm, or bun:

npm install sslko

yarn add sslko

pnpm add sslko

bun add sslko

🚀 Quick Start

Get Certificate Information

import { getCertificateInfo } from "sslko";

const certInfo = await getCertificateInfo("example.com");
console.log(certInfo);

Will return an CertificateInfo object. The most important properties are:

• daysLeft - Number of days until the certificate expires.
• daysTotal - Total number of days the certificate is valid for.
• errorCode - The error code if the certificate validation failed.
• errors - List of errors found during certificate validation.
• expired - Boolean indicating if the certificate has expired.
• valid - Boolean indicating if the certificate is currently valid.
• validFor - The list of valid subject alternative names (SANs) for the certificate.
• validFromDate - The date from which the certificate is valid.
• validToDate - The date until which the certificate is valid.
• warnings - List of warnings found during certificate validation.

Get Certificate

import { getCertificate } from 'sslko';

const cert = await getCertificate('example.com');

There is few options you can pass to the getCertificate function:

import { getCertificate } from 'sslko';

const cert = await getCertificate('example.com', {
	port: 488, // Default is 443
	timeout: 10000, // Default is 5000ms => 5 seconds
});

More information about the options can be found in the API documentation.

📄 License

MIT License - see the LICENSE file for details.

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

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Made with ❤️ by the Roman Ožana