Cert Tool Chrome Extension

A powerful and elegant Chrome extension for handling X.509 certificates and cryptographic keys. Designed with a premium dark-mode interface and glassmorphism aesthetics.

Features

1. Key Pair Generation

Generate cryptographic key pairs instantly using the Web Crypto API.

• Algorithms: RSA (2048, 4096 bits), ECDSA (P-256, P-384, P-521), and Ed25519.
• Standard Formats: Private keys are exported in PKCS#8 and public keys in SPKI.
• Save As: Easily download keys with a standard OS save dialog.

2. CSR Generation

Create Certificate Signing Requests (CSR) with a user-friendly form.

• Customizable DN: Set Common Name, Organization, Country, and more.
• SAN Support: Add multiple Subject Alternative Names (DNS, IP, Email, URI).
• Flexible Signing: Sign the request using your own private key.

3. Public Key Derivation

Extract the public key component from various sources.

• Input Types: Supports Private Keys (PKCS#8/PKCS#1), Certificates, or CSRs.
• Auto-Detection: Automatically identifies the input type and algorithm.

4. Certificate/CSR Inspector

View detailed information about certificates and signing requests.

• Comprehensive View: Shows Serial Number, Subject, Issuer, Validity, and Public Key details.
• Extension Decoding: Human-readable decoding for SANs, Basic Constraints, Key Usage, and Extended Key Usage (EKU).

Installation

1. Clone this repository.
2. Run npm install to install dependencies.
3. Run npm run build to generate the production build in the dist folder.
4. Open Chrome and navigate to chrome://extensions.
5. Enable "Developer mode" (top right).
6. Click "Load unpacked" and select the dist directory.

Technology Stack

• Framework: Vite + React + TypeScript
• Crypto Library: node-forge & Web Crypto API
• Icons: Lucide React
• Styling: Vanilla CSS with Glassmorphism effects

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Developed with focus on security, usability, and modern aesthetics.