tupui · tupui · Dec 16, 2024 · Dec 13, 2024 · Dec 13, 2024 · Dec 13, 2024
diff --git a/.gitignore b/.gitignore
@@ -38,3 +38,4 @@ yarn-error.log*
 
 # Storacha proof and keys
 .storacha
+encrypted_proof.bin.test
diff --git a/AES256-encryptor/.gitignore b/AES256-encryptor/.gitignore
@@ -0,0 +1,24 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+package-lock.json
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
diff --git a/AES256-encryptor/README.md b/AES256-encryptor/README.md
@@ -0,0 +1,2 @@
+You can encryt string data to AES256 encrypted payload and decrypt it.
+The displayed key is Hex data of key.
diff --git a/AES256-encryptor/package.json b/AES256-encryptor/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "encrypt-proof",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "cra-template": "1.2.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-scripts": "5.0.1"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject",
+    "formatter": "prettier --write .",
+    "linter": "prettier -c ."
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  },
+  "devDependencies": {
+    "prettier": "^3.4.2"
+  }
+}
diff --git a/AES256-encryptor/public/index.html b/AES256-encryptor/public/index.html
@@ -0,0 +1,43 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>
diff --git a/AES256-encryptor/public/manifest.json b/AES256-encryptor/public/manifest.json
@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/AES256-encryptor/src/App.css b/AES256-encryptor/src/App.css
diff --git a/AES256-encryptor/src/App.jsx b/AES256-encryptor/src/App.jsx
@@ -0,0 +1,75 @@
+import React, { useState, useEffect } from "react";
+import { generateKey, encryptData, getKeyHex } from "./encryptData.js";
+import { decryptData, getKeyFromHex } from "./decryptData.js";
+
+const headerText = "storachaProof";
+const header = new TextEncoder().encode(headerText);
+
+const App = () => {
+  const [keyHex, setKeyHex] = useState(null);
+  const [plaintext, setPlaintext] = useState("This is secret data");
+  const [encryptedPayload, setEncryptedPayload] = useState(null);
+  const [decryptedText, setDecryptedText] = useState(null);
+
+  useEffect(() => {
+    (async () => {
+      const newKey = await generateKey();
+      setKeyHex(await getKeyHex(newKey));
+    })();
+  }, []);
+
+  const handleEncrypt = async () => {
+    if (keyHex) {
+      const data = new TextEncoder().encode(plaintext);
+      const key = await getKeyFromHex(keyHex);
+      const payload = await encryptData(key, data, header);
+      setEncryptedPayload(payload);
+    }
+  };
+
+  const handleDecrypt = async () => {
+    if (keyHex && encryptedPayload) {
+      const key = await getKeyFromHex(keyHex);
+      const decrypted = await decryptData(key, encryptedPayload);
+      setDecryptedText(new TextDecoder().decode(decrypted));
+    }
+  };
+
+  return (
+    <div>
+      <h1>AES Encryption/Decryption in React</h1>
+      <div>
+        <label>Plaintext:</label>
+        <input
+          type="text"
+          value={plaintext}
+          onChange={(e) => setPlaintext(e.target.value)}
+        />
+      </div>
+      <div>
+        <button onClick={handleEncrypt}>Encrypt</button>
+      </div>
+      {keyHex && (
+        <div>
+          <h2>Key:</h2>
+          <p>{keyHex}</p>
+        </div>
+      )}
+      {encryptedPayload && (
+        <div>
+          <h2>Encrypted Payload:</h2>
+          <pre>{JSON.stringify(encryptedPayload, null, 2)}</pre>
+          <button onClick={handleDecrypt}>Decrypt</button>
+        </div>
+      )}
+      {decryptedText && (
+        <div>
+          <h2>Decrypted Text:</h2>
+          <p>{decryptedText}</p>
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default App;
diff --git a/AES256-encryptor/src/decryptData.js b/AES256-encryptor/src/decryptData.js
@@ -0,0 +1,77 @@
+function base64ToArrayBuffer(base64) {
+  const binaryString = window.atob(base64);
+  const bytes = new Uint8Array(binaryString.length);
+  for (let i = 0; i < binaryString.length; i++) {
+    bytes[i] = binaryString.charCodeAt(i);
+  }
+  return bytes.buffer;
+}
+
+function hexToArrayBuffer(hex) {
+  if (hex.length % 2 !== 0) {
+    throw new Error("Invalid hex string");
+  }
+  const byteArray = new Uint8Array(hex.length / 2);
+  for (let i = 0; i < byteArray.length; i++) {
+    byteArray[i] = parseInt(hex.substr(i * 2, 2), 16);
+  }
+  return byteArray.buffer;
+}
+
+/**
+ * Decrypts the given payload using the provided AES-GCM key.
+ * @param {CryptoKey} key - The AES-GCM key
+ * @param {Object} payload - The JSON payload with nonce, header, ciphertext, tag
+ * @returns {Uint8Array} plaintext
+ */
+export async function decryptData(key, payload) {
+  const nonce = new Uint8Array(base64ToArrayBuffer(payload.nonce));
+  const header = new Uint8Array(base64ToArrayBuffer(payload.header));
+  const ciphertext = new Uint8Array(base64ToArrayBuffer(payload.ciphertext));
+  const tag = new Uint8Array(base64ToArrayBuffer(payload.tag));
+
+  // In AES-GCM, the tag is appended at the end of ciphertext,
+  // so we must recombine them before decrypting.
+  const encryptedCombined = new Uint8Array(ciphertext.length + tag.length);
+  encryptedCombined.set(ciphertext, 0);
+  encryptedCombined.set(tag, ciphertext.length);
+
+  const decrypted = await window.crypto.subtle.decrypt(
+    {
+      name: "AES-GCM",
+      iv: nonce,
+      additionalData: header,
+      tagLength: 128,
+    },
+    key,
+    encryptedCombined.buffer,
+  );
+
+  return new Uint8Array(decrypted);
+}
+
+export async function getKeyFromHex(keyHex) {
+  const keyBytes = hexToArrayBuffer(keyHex);
+  const key = await window.crypto.subtle.importKey(
+    "raw",
+    keyBytes,
+    { name: "AES-GCM", length: 256 },
+    true, // extractable (can be set to false in production if you don't need to export it)
+    ["encrypt", "decrypt"],
+  );
+
+  return key;
+}
+
+export async function getKeyFromBase64(keyBase64) {
+  const keyBytes = base64ToArrayBuffer(keyBase64);
+  const key = await window.crypto.subtle.importKey(
+    "raw",
+    keyBytes,
+    { name: "AES-GCM", length: 256 },
+    true, // extractable (can be set to false in production if you don't need to export it)
+    ["encrypt", "decrypt"],
+  );
+
+  return key;
+}
diff --git a/AES256-encryptor/src/encryptData.js b/AES256-encryptor/src/encryptData.js
@@ -0,0 +1,79 @@
+// A helper function to convert ArrayBuffers to base64
+function arrayBufferToBase64(buffer) {
+  let binary = "";
+  const bytes = new Uint8Array(buffer);
+  for (let i = 0; i < bytes.byteLength; i++) {
+    binary += String.fromCharCode(bytes[i]);
+  }
+  return window.btoa(binary);
+}
+
+// A helper function to convert ArrayBuffers to Hex
+function arrayBufferToHex(buffer) {
+  const bytes = new Uint8Array(buffer);
+  return [...bytes].map((b) => b.toString(16).padStart(2, "0")).join("");
+}
+
+// Generate a new AES-GCM key (32-byte key)
+export async function generateKey() {
+  return await window.crypto.subtle.generateKey(
+    {
+      name: "AES-GCM",
+      length: 256,
+    },
+    true,
+    ["encrypt", "decrypt"],
+  );
+}
+
+/**
+ * Encrypts given data using the provided AES-GCM key.
+ * @param {CryptoKey} key - The AES-GCM key.
+ * @param {Uint8Array} data - The plaintext data to encrypt.
+ * @param {Uint8Array} header - Additional authenticated data.
+ * @returns {Object} payload containing nonce, header, ciphertext, tag
+ */
+export async function encryptData(key, data, header) {
+  // Generate a random nonce (nonce)
+  const nonce = window.crypto.getRandomValues(new Uint8Array(12));
+
+  const encrypted = await window.crypto.subtle.encrypt(
+    {
+      name: "AES-GCM",
+      iv: nonce,
+      additionalData: header,
+      tagLength: 128,
+    },
+    key,
+    data,
+  );
+
+  // The encrypted result includes the ciphertext and tag together in AES-GCM.
+  // The last 16 bytes of the encrypted data are the tag.
+  const encryptedBytes = new Uint8Array(encrypted);
+  const ciphertext = encryptedBytes.slice(0, encryptedBytes.length - 16);
+  const tag = encryptedBytes.slice(encryptedBytes.length - 16);
+
+  const payload = {
+    nonce: arrayBufferToBase64(nonce.buffer),
+    header: arrayBufferToBase64(header.buffer),
+    ciphertext: arrayBufferToBase64(ciphertext.buffer),
+    tag: arrayBufferToBase64(tag.buffer),
+  };
+
+  return payload;
+}
+
+export async function getKeyHex(key) {
+  const rawKey = await window.crypto.subtle.exportKey("raw", key);
+  const keyHex = arrayBufferToHex(rawKey);
+
+  return keyHex;
+}
+
+export async function getKeyBase64(key) {
+  const rawKey = await window.crypto.subtle.exportKey("raw", key);
+  const keyBase64 = arrayBufferToBase64(rawKey);
+
+  return keyBase64;
+}
diff --git a/AES256-encryptor/src/index.css b/AES256-encryptor/src/index.css
@@ -0,0 +1,8 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
+    "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
+    "Helvetica Neue", sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
diff --git a/AES256-encryptor/src/index.js b/AES256-encryptor/src/index.js
@@ -0,0 +1,11 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import "./index.css";
+import App from "./App";
+
+const root = ReactDOM.createRoot(document.getElementById("root"));
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -38,3 +38,4 @@ yarn-error.log*

		# Storacha proof and keys
		.storacha
		encrypted_proof.bin.test
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		You can encryt string data to AES256 encrypted payload and decrypt it.
		The displayed key is Hex data of key.