Certificate Store

A simple web application for managing and viewing digital certificates directly in the browser. Users can upload certificate files, view essential details, and store them locally using LocalStorage.

🚀 Features

• Drag & Drop upload of .cer certificate files
• Certificate parsing using ASN.1 format
• Display of essential certificate details:
  • Common Name (CN)
  • Issuer Name
  • Validity Period (Valid From / Valid To)
• Persistent storage in LocalStorage — certificates remain after page reloads
• Interactive table — click a certificate to view its details

🛠 Technologies

• React (JavaScript)
• asn1js for parsing certificate files
• LocalStorage API
• HTML5 Drag & Drop API

📦 Installation

To run the project locally:

git clone https://github.com/serhmel/react-certificate-store.git
cd react-certificate-store
npm install
npm start

📁 Certificate Format

This app supports .cer files encoded in DER/ASN.1 format. The following fields are extracted and displayed:

• Common Name (CN)
• Issuer Name
• Validity Period: start and end dates

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