{"id":35489007,"url":"https://github.com/mkontani/cert-tool-extension","last_synced_at":"2026-02-07T19:08:32.543Z","repository":{"id":332408116,"uuid":"1127234208","full_name":"mkontani/cert-tool-extension","owner":"mkontani","description":null,"archived":false,"fork":false,"pushed_at":"2026-01-05T19:18:44.000Z","size":1806,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-01-13T19:42:11.887Z","etag":null,"topics":["chrome-extension","cryptography"],"latest_commit_sha":null,"homepage":"https://mkontani.github.io/cert-tool-extension/","language":"TypeScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/mkontani.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-01-03T13:15:49.000Z","updated_at":"2026-01-12T07:01:03.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/mkontani/cert-tool-extension","commit_stats":null,"previous_names":["mkontani/cert-tool-extension"],"tags_count":2,"template":false,"template_full_name":null,"purl":"pkg:github/mkontani/cert-tool-extension","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mkontani%2Fcert-tool-extension","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mkontani%2Fcert-tool-extension/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mkontani%2Fcert-tool-extension/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mkontani%2Fcert-tool-extension/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mkontani","download_url":"https://codeload.github.com/mkontani/cert-tool-extension/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mkontani%2Fcert-tool-extension/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29205176,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-02-07T17:44:10.191Z","status":"ssl_error","status_checked_at":"2026-02-07T17:44:07.936Z","response_time":63,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["chrome-extension","cryptography"],"created_at":"2026-01-03T15:15:51.172Z","updated_at":"2026-02-07T19:08:32.538Z","avatar_url":"https://github.com/mkontani.png","language":"TypeScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Cert Tool Chrome Extension\n\n![Cert Tool Icon](public/icons/icon128.png)\n\nA powerful and elegant Chrome extension for handling X.509 certificates and cryptographic keys. Designed with a premium dark-mode interface and glassmorphism aesthetics.\n\n[![Chrome Web Store](https://img.shields.io/badge/Chrome_Web_Store-Available-blue?logo=google-chrome\u0026logoColor=white)](https://chromewebstore.google.com/detail/cert-tool/ojgmjpfknnlfcfjcljkdcfpbpgciefkk)\n\n## Features\n\n### 1. Key Pair Generation\nGenerate cryptographic key pairs instantly using the Web Crypto API.\n![Key Pair Generation](screenshots/gen_keypair_screenshot_web.jpg)\n- **Algorithms**: RSA (2048, 4096 bits), ECDSA (P-256, P-384, P-521), and Ed25519.\n- **Standard Formats**: Private keys are exported in **PKCS#8** and public keys in **SPKI**.\n- **Save As**: Easily download keys with a standard OS save dialog.\n\n### 2. CSR Generation\nCreate Certificate Signing Requests (CSR) with a user-friendly form.\n![CSR Generation](screenshots/gen_csr_screenshot_web.jpg)\n- **Customizable DN**: Set Common Name, Organization, Country, and more.\n- **SAN Support**: Add multiple Subject Alternative Names (DNS, IP, Email, URI).\n- **Flexible Signing**: Sign the request using your own private key.\n\n### 3. Public Key Derivation\nExtract the public key component from various sources.\n![Public Key Derivation](screenshots/derive_pubkey_screenshot_web.jpg)\n- **Input Types**: Supports Private Keys (PKCS#8/PKCS#1), Certificates, or CSRs.\n- **Auto-Detection**: Automatically identifies the input type and algorithm.\n\n### 4. Certificate/CSR Inspector\nView detailed information about certificates and signing requests.\n![Inspector](screenshots/inspector_screenshot_web.jpg)\n- **Comprehensive View**: Shows Serial Number, Subject, Issuer, Validity, and Public Key details.\n- **Extension Decoding**: Human-readable decoding for SANs, Basic Constraints, Key Usage, and Extended Key Usage (EKU).\n\n## Installation\n\n1. Clone this repository.\n2. Run `npm install` to install dependencies.\n3. Run `npm run build` to generate the production build in the `dist` folder.\n4. Open Chrome and navigate to `chrome://extensions`.\n5. Enable \"Developer mode\" (top right).\n6. Click \"Load unpacked\" and select the `dist` directory.\n\n## Technology Stack\n- **Framework**: Vite + React + TypeScript\n- **Crypto Library**: [node-forge](https://github.com/digitalbazaar/forge) \u0026 Web Crypto API\n- **Icons**: [Lucide React](https://lucide.dev/)\n- **Styling**: Vanilla CSS with Glassmorphism effects\n\n---\nDeveloped with focus on security, usability, and modern aesthetics.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmkontani%2Fcert-tool-extension","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmkontani%2Fcert-tool-extension","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmkontani%2Fcert-tool-extension/lists"}