commit 42aca0ebce91f5ee143573aea1cab9f4e4927e8e
Author: soruly <soruly@gmail.com>
Date:   Thu Jun 16 08:28:12 2022 +0000

    Init

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..7f37771
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+SERVER_PORT=3000
+SERVER_ADDR=127.0.0.1
\ No newline at end of file
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..e2a7645
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [soruly] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: soruly
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: https://www.paypal.me/soruly/
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..93e0707
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "21:00"
+  open-pull-requests-limit: 99
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000..a04c559
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,66 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [master]
+  schedule:
+    - cron: '0 21 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        # Override automatic language detection by changing the below list
+        # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
+        language: ['javascript']
+        # Learn more...
+        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        # We must fetch at least the immediate parents so that if this is
+        # a pull request then we can checkout the head.
+        fetch-depth: 2
+
+    # If this run was triggered by a pull request event, then checkout
+    # the head of the pull request instead of the merge commit.
+    - run: git checkout HEAD^2
+      if: ${{ github.event_name == 'pull_request' }}
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file. 
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
new file mode 100644
index 0000000..b8140f9
--- /dev/null
+++ b/.github/workflows/node.js.yml
@@ -0,0 +1,30 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js Lint
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x, 18.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3674626
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,64 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# next.js build output
+.next
+
+# local data storage
+data/
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..de753c5
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,3 @@
+{
+  "printWidth": 100
+}
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..09c22a8
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at soruly@gmail.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..818a97b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 soruly
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..aa140c9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,63 @@
+# 2FA
+
+[![License](https://img.shields.io/github/license/soruly/2fa.svg?style=flat-square)](https://github.com/soruly/2fa/blob/master/LICENSE)
+[![GitHub Workflow Status](https://img.shields.io/github/workflow/status/soruly/2fa/Docker%20Image%20CI?style=flat-square)](https://github.com/soruly/2fa/actions)
+
+Self hosted 2-factor authentication PWA
+
+## Features
+
+- Installable PWA
+- (TBC) Display timeout indicator
+- (TBC) Scan QR Code instead of manual input
+- (TBC) Show QR Code for copying to other devices
+
+## Getting Started
+
+Prerequisites: nodejs >= 16
+
+```
+git clone https://github.com/soruly/2fa.git
+cd 2fa
+npm install
+node server.js
+```
+
+Note: In order for PWA to work, you must host the server behind a reverse proxy (like nginx) with HTTPS
+
+Example nginx config:
+
+```
+location / {
+  proxy_set_header Host $host;
+  proxy_set_header Upgrade $http_upgrade;
+  proxy_set_header Connection upgrade;
+  proxy_buffering off;
+  proxy_cache off;
+  proxy_pass http://127.0.0.1:3000;
+}
+```
+
+### Environment Variables
+
+- Copy `.env.example` to `.env`
+- Edit `.env` as you need
+
+```
+SERVER_PORT # (optional) Default: 3000
+SERVER_ADDR # (optional) Default: 127.0.0.1
+```
+
+### Run by pm2
+
+You also can use [pm2](https://pm2.keymetrics.io/) to run this in background.
+
+Use below commands to start / restart / stop server.
+
+```
+npm run start
+npm run stop
+npm run reload
+npm run restart
+npm run delete
+```
diff --git a/ecosystem.config.json b/ecosystem.config.json
new file mode 100644
index 0000000..41e6b41
--- /dev/null
+++ b/ecosystem.config.json
@@ -0,0 +1,10 @@
+{
+  "apps": [
+    {
+      "name": "2fa",
+      "script": "server.js",
+      "instances": 1,
+      "exec_mode": "fork"
+    }
+  ]
+}
diff --git a/index.ejs b/index.ejs
new file mode 100644
index 0000000..465bed1
--- /dev/null
+++ b/index.ejs
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html translate="no">
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+  <meta
+    name="viewport"
+    content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"
+  />
+  <meta name="google" content="notranslate" />
+  <meta name="robots" content="noindex, nofollow" />
+
+  <meta name="apple-mobile-web-app-capable" content="yes" />
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+
+  <title>Authenticator</title>
+  <link rel="manifest" href="/manifest.json" />
+  <link rel="icon" type="image/png" href="/favicon.png" />
+  <link rel="apple-touch-icon" href="/favicon.png" />
+  <link rel="stylesheet" href="/style.css" />
+
+  <% list.forEach(function(e){ %>
+  <div class="item" id="<%= e.name %>">
+    <div class="title"><%= e.name %></div>
+    <div class="body">
+      <div class="otp"><%= e.otp %></div>
+      <span class="delete material-icons">delete</span>
+    </div>
+  </div>
+  <% }); %>
+
+  <form method="post" action="/" enctype="application/x-www-form-urlencoded">
+    <label>
+      Name
+      <input name="name" type="text" required />
+    </label>
+    <label>
+      Secret
+      <input name="otp" type="text" required minlength="16" />
+    </label>
+    <input type="submit" />
+  </form>
+  <script src="client.js" defer></script>
+</html>
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b289eab
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1419 @@
+{
+  "name": "2fa.soruly.com",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "2fa.soruly.com",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "dotenv": "^16.0.1",
+        "ejs": "^3.1.8",
+        "express": "^4.18.1",
+        "express-rate-limit": "^6.4.0",
+        "fs-extra": "^10.1.0"
+      },
+      "devDependencies": {
+        "prettier": "^2.7.1"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
+    },
+    "node_modules/async": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
+      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
+    },
+    "node_modules/body-parser": {
+      "version": "1.20.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.0.tgz",
+      "integrity": "sha512-DfJ+q6EPcGKZD1QWUjSpqp+Q7bDQTsQIF4zfUAtZ6qk+H/3/QRhg9CEp39ss+/T2vw0+HaidC0ecJj/DRLIaKg==",
+      "dependencies": {
+        "bytes": "3.1.2",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "2.0.0",
+        "destroy": "1.2.0",
+        "http-errors": "2.0.0",
+        "iconv-lite": "0.4.24",
+        "on-finished": "2.4.1",
+        "qs": "6.10.3",
+        "raw-body": "2.5.1",
+        "type-is": "~1.6.18",
+        "unpipe": "1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8",
+        "npm": "1.2.8000 || >= 1.4.16"
+      }
+    },
+    "node_modules/brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/bytes": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
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+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/call-bind": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
+      "integrity": "sha512-7O+FbCihrB5WGbFYesctwmTKae6rOiIzmz1icreWJ+0aA7LJfuqhEso2T9ncpcFtzMQtzXf2QGGueWJGTYsqrA==",
+      "dependencies": {
+        "function-bind": "^1.1.1",
+        "get-intrinsic": "^1.0.2"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+      "dependencies": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
+    },
+    "node_modules/concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
+    },
+    "node_modules/content-disposition": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
+      "integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
+      "dependencies": {
+        "safe-buffer": "5.2.1"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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+        }
+      }
+    },
+    "serve-static": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.15.0.tgz",
+      "integrity": "sha512-XGuRDNjXUijsUL0vl6nSD7cwURuzEgglbOaFuZM9g3kwDXOWVTck0jLzjPzGD+TazWbboZYu52/9/XPdUgne9g==",
+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.3",
+        "send": "0.18.0"
+      }
+    },
+    "setprototypeof": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+      "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="
+    },
+    "side-channel": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
+      "integrity": "sha512-q5XPytqFEIKHkGdiMIrY10mvLRvnQh42/+GoBlFW3b2LXLE2xxJpZFdm94we0BaoV3RwJyGqg5wS7epxTv0Zvw==",
+      "requires": {
+        "call-bind": "^1.0.0",
+        "get-intrinsic": "^1.0.2",
+        "object-inspect": "^1.9.0"
+      }
+    },
+    "statuses": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
+      "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
+    },
+    "supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "requires": {
+        "has-flag": "^4.0.0"
+      }
+    },
+    "toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
+    },
+    "type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
+    },
+    "universalify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+      "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA=="
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d8abb84
--- /dev/null
+++ b/package.json
@@ -0,0 +1,39 @@
+{
+  "name": "2fa.soruly.com",
+  "version": "1.0.0",
+  "description": "Self-hosted 2FA app",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "start": "pm2 start ecosystem.config.json",
+    "watch": "pm2 start ecosystem.config.json --watch",
+    "stop": "pm2 stop ecosystem.config.json",
+    "restart": "pm2 restart ecosystem.config.json",
+    "reload": "pm2 reload ecosystem.config.json",
+    "delete": "pm2 delete ecosystem.config.json",
+    "prettier": "prettier",
+    "format": "prettier --write \"**/*.js\"",
+    "lint": "prettier --check \"**/*.js\"",
+    "test": "prettier --check \"**/*.js\""
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/soruly/2fa.git"
+  },
+  "author": "soruly",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/soruly/2fa/issues"
+  },
+  "homepage": "https://github.com/soruly/2fa#readme",
+  "dependencies": {
+    "dotenv": "^16.0.1",
+    "ejs": "^3.1.8",
+    "express": "^4.18.1",
+    "express-rate-limit": "^6.4.0",
+    "fs-extra": "^10.1.0"
+  },
+  "devDependencies": {
+    "prettier": "^2.7.1"
+  }
+}
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..c105515
--- /dev/null
+++ b/server.js
@@ -0,0 +1,126 @@
+import "dotenv/config.js";
+import fs from "fs-extra";
+import path from "path";
+import crypto from "crypto";
+import express from "express";
+import rateLimit from "express-rate-limit";
+
+const { SERVER_ADDR = "0.0.0.0", SERVER_PORT = 3000 } = process.env;
+
+const app = express();
+
+app.disable("x-powered-by");
+
+app.set("trust proxy", 1);
+app.set("view engine", "ejs");
+app.set("views", path.resolve("."));
+
+app.use(express.json());
+
+app.use((req, res, next) => {
+  res.set("Access-Control-Allow-Origin", "*");
+  res.set("Access-Control-Allow-Methods", "GET, OPTIONS");
+  res.set("Referrer-Policy", "no-referrer");
+  res.set("X-Content-Type-Options", "nosniff");
+  res.set(
+    "Content-Security-Policy",
+    [
+      "default-src 'self'",
+      "base-uri 'none'",
+      "frame-ancestors 'none'",
+      "block-all-mixed-content",
+    ].join("; ")
+  );
+  next();
+});
+
+app.use(
+  rateLimit({
+    max: 120, // 120 requests per IP address (per node.js process)
+    windowMs: 60 * 1000, // per 1 minute
+  })
+);
+
+app.get(/[^\/]+\.[^\/]+$/, express.static("./static", { maxAge: 1000 * 60 * 60 * 24 }));
+
+app.delete("/", (req, res) => {
+  fs.copyFileSync("data/latest.json", `data/${Date.now()}.json`);
+  fs.writeFileSync(
+    "data/latest.json",
+    JSON.stringify(
+      JSON.parse(fs.readFileSync("data/latest.json")).filter((e) => e.name !== req.body.name),
+      null,
+      2
+    )
+  );
+  return res.sendStatus(204);
+});
+
+app.post("/", (req, res) => {
+  fs.copyFileSync("data/latest.json", `data/${Date.now()}.json`);
+  fs.writeFileSync(
+    "data/latest.json",
+    JSON.stringify(JSON.parse(fs.readFileSync("data/latest.json")).concat(req.body), null, 2)
+  );
+  return res.sendStatus(204);
+});
+
+app.get("/", async (req, res) => {
+  if (req.headers.accept?.toLowerCase() === "text/event-stream") {
+    res.set({
+      "Cache-Control": "no-cache",
+      "Content-Type": "text/event-stream",
+    });
+    res.flushHeaders();
+
+    res.write("retry: 1000\n\n");
+    while (true) {
+      res.write(
+        `data: ${JSON.stringify(
+          JSON.parse(fs.readFileSync("data/latest.json")).map(({ name, otp }) => ({
+            name,
+            otp: getOtp(otp),
+          }))
+        )}\n\n`
+      );
+
+      await new Promise((resolve) =>
+        setTimeout(
+          resolve,
+          (Math.floor(Math.round(new Date().getTime() / 1000.0) / 30) + 1) * 30 * 1000 -
+            new Date().getTime()
+        )
+      );
+    }
+  }
+  return res.render("index", {
+    list: JSON.parse(fs.readFileSync("data/latest.json")).map(({ name, otp }) => ({
+      name,
+      otp: getOtp(otp),
+    })),
+  });
+});
+
+if (!fs.existsSync("data/latest.json")) fs.outputFileSync("data/latest.json", JSON.stringify([]));
+
+app.listen(SERVER_PORT, SERVER_ADDR, () =>
+  console.log(`Media server listening on ${SERVER_ADDR}:${SERVER_PORT}`)
+);
+
+const getOtp = (secret) => {
+  const timeBuffer = Buffer.alloc(8, 0);
+  timeBuffer.writeUInt32BE(Math.floor(Math.round(new Date().getTime() / 1000.0) / 30), 4);
+  const bits = secret
+    .toUpperCase()
+    .split("")
+    .map((c) => "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567".indexOf(c).toString(2).padStart(5, "0"))
+    .join("");
+  const secretBuffer = Buffer.alloc(Math.ceil(secret.length / 16) * 10);
+  for (let i = 0; i <= Math.floor(bits.length / 8); i++) {
+    secretBuffer[i] = parseInt(bits.substring(i * 8, (i + 1) * 8), 2);
+  }
+  const hmac = crypto.createHmac("sha1", secretBuffer).update(timeBuffer).digest("hex");
+  const offset = parseInt(hmac.substring(hmac.length - 1), 16) & 0x7fffffff;
+  const otp = (parseInt(hmac.substring(offset * 2, offset * 2 + 8), 16) & 0x7fffffff).toString();
+  return otp.length > 6 ? otp.substring(otp.length - 6) : otp.padStart(6, "0");
+};
diff --git a/static/MaterialIcons-Regular.woff2 b/static/MaterialIcons-Regular.woff2
new file mode 100644
index 0000000..9fa2112
Binary files /dev/null and b/static/MaterialIcons-Regular.woff2 differ
diff --git a/static/client.js b/static/client.js
new file mode 100644
index 0000000..ff93f7f
--- /dev/null
+++ b/static/client.js
@@ -0,0 +1,38 @@
+const events = new EventSource("/");
+
+events.onmessage = (event) => {
+  for (const { name, otp } of JSON.parse(event.data)) {
+    document.querySelector(`#${name} .otp`).innerText = otp;
+  }
+};
+
+document.querySelector("form").onsubmit = async (e) => {
+  e.preventDefault();
+  const res = await fetch("/", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({
+      name: e.target.querySelector(`[name=name]`).value,
+      otp: e.target.querySelector(`[name=otp]`).value,
+    }),
+  });
+  if (res.status === 204) window.location.reload();
+  return false;
+};
+
+for (const e of document.querySelectorAll(".delete")) {
+  e.addEventListener("click", async (e) => {
+    if (confirm(`Delete ${e.target.parentElement.id} ?`)) {
+      const res = await fetch("/", {
+        method: "DELETE",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          name: e.target.parentElement.id,
+        }),
+      });
+      if (res.status === 204) window.location.reload();
+    }
+  });
+}
+
+if (navigator.serviceWorker) navigator.serviceWorker.register("/sw.js");
diff --git a/static/favicon.png b/static/favicon.png
new file mode 100644
index 0000000..db18b4d
Binary files /dev/null and b/static/favicon.png differ
diff --git a/static/icon.png b/static/icon.png
new file mode 100644
index 0000000..2b8b70d
Binary files /dev/null and b/static/icon.png differ
diff --git a/static/manifest.json b/static/manifest.json
new file mode 100644
index 0000000..5e7801f
--- /dev/null
+++ b/static/manifest.json
@@ -0,0 +1,23 @@
+{
+  "name": "soruly 2FA",
+  "short_name": "soruly 2FA",
+  "icons": [
+    {
+      "src": "favicon.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "icon.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ],
+  "start_url": "/",
+  "display": "standalone",
+  "orientation": "natural",
+  "background_color": "#ffffff",
+  "theme_color": "#ffffff"
+}
diff --git a/static/style.css b/static/style.css
new file mode 100644
index 0000000..7773e66
--- /dev/null
+++ b/static/style.css
@@ -0,0 +1,106 @@
+html,
+body {
+  margin: 0;
+  padding: 0;
+  font-family: system-ui, Meiryo, sans-serif, Arial;
+  user-select: none;
+  -webkit-user-select: none;
+}
+body {
+  max-width: 30rem;
+  margin: auto;
+}
+@font-face {
+  font-display: block;
+  font-family: "Material Icons";
+  font-style: normal;
+  font-weight: 400;
+  src: local("Material Icons"), local("MaterialIcons-Regular"),
+    url(/MaterialIcons-Regular.woff2) format("woff2");
+}
+.material-icons {
+  font-family: "Material Icons";
+  font-weight: normal;
+  font-style: normal;
+  display: inline-block;
+  line-height: 1;
+  text-transform: none;
+  letter-spacing: normal;
+  word-wrap: normal;
+  white-space: nowrap;
+  direction: ltr;
+
+  -webkit-font-smoothing: antialiased;
+  text-rendering: optimizeLegibility;
+  -moz-osx-font-smoothing: grayscale;
+}
+.root::before {
+  display: none;
+  font-family: "Material Icons";
+}
+.hidden {
+  display: none;
+}
+.item {
+  border-bottom: 0.125rem solid #cccccc;
+  margin: 1rem;
+}
+.item .title {
+  font-weight: bold;
+  color: #333333;
+}
+.item .body {
+  display: flex;
+  justify-content: space-between;
+}
+.item .body .otp {
+  font-size: 2rem;
+  color: #3673d7;
+  user-select: text;
+}
+.item .body .qrcode,
+.item .body .delete {
+  display: flex;
+  align-items: center;
+  cursor: pointer;
+  font-size: 2rem;
+  color: #666666;
+}
+
+form {
+  display: flex;
+  margin: 1rem;
+}
+
+label {
+  font-size: 0.75rem;
+}
+
+input[type="text"] {
+  width: 10rem;
+  height: 1.25rem;
+}
+input[name="otp"] {
+  text-transform: uppercase;
+}
+
+input[type="submit"] {
+  background: #3673d7;
+  color: #ffffff;
+  font-weight: bold;
+  border-radius: 0.2rem;
+  font-size: 1rem;
+  cursor: pointer;
+  border: none;
+  padding: 0.5rem 0.75rem;
+  margin: 0.5rem;
+  box-shadow: 0 0 0.125rem #cccccc;
+}
+input[type="submit"]:hover {
+  background: #1e63d3;
+  box-shadow: 0 0 0.25rem #cccccc;
+}
+input[type="submit"]:active {
+  background: #3673d7;
+  box-shadow: none;
+}
diff --git a/static/sw.js b/static/sw.js
new file mode 100644
index 0000000..c7c6c6c
--- /dev/null
+++ b/static/sw.js
@@ -0,0 +1,3 @@
+self.addEventListener("fetch", (event) => {
+  return;
+});