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This application is an SSL Certificate Manager designed to facilitate the generation and management of SSL certificates directly within a web browser. It allows users to create RSA key pairs, generate Certificate Signing Requests (CSRs), and manage signed certificates, including the ability to upload and validate certificates from Certificate Authorities (CAs). To use the app, users can navigate through a series of steps that include generating a new RSA key pair or importing an existing private key, creating a CSR, and finally managing the resulting certificates. The user interface is structured with tabs and forms that guide users through each process, providing options for inputting necessary information such as common name, organization, and other relevant details. The application is built using modern web technologies, including TypeScript, React, and Next.js, along with various libraries such as Radix UI for components, Tailwind CSS for styling, and JSZip for handling ZIP file downloads. The app leverages the Web Crypto API for cryptographic operations, ensuring secure key generation and management. Key features of the app include: - RSA key pair generation with customizable key sizes (2048, 3072, or 4096 bits). - Import functionality for existing private keys in PEM format. - CSR generation based on user-provided details. - Upload and validation of signed certificates and intermediate certificates. - Self-signing capability for certificates, useful for testing and development. - A certificate manager that allows users to view, copy, and download their keys and certificates. - Local storage support for saving and retrieving previously generated or imported keys and certificates. Overall, this SSL Certificate Manager provides a comprehensive solution for users looking to manage SSL certificates efficiently and securely within a browser environment.