refactor: Organize Project Structure (#1211)

* refactor: Organize Project Structure

* fix

* fix

* rm security

* fix

src/service/security.js

@@ -0,0 +1,67 @@
+const defaultAESKey = new TextEncoder().encode(
+    'https://github.com/pypy-vrc/VRCX'
+);
+
+const hexToUint8Array = (hexStr) => {
+    const r = hexStr.match(/.{1,2}/g);
+    if (!r) return null;
+    return new Uint8Array(r.map((b) => parseInt(b, 16)));
+};
+
+const uint8ArrayToHex = (arr) =>
+    arr.reduce((str, byte) => str + byte.toString(16).padStart(2, '0'), '');
+
+function stdAESKey(key) {
+    const tKey = new TextEncoder().encode(key);
+    let sk = tKey;
+    if (key.length < 32) {
+        sk = new Uint8Array(32);
+        sk.set(tKey);
+        sk.set(defaultAESKey.slice(key.length, 32), key.length);
+    }
+    return sk.slice(0, 32);
+}
+
+async function encrypt(plaintext, key) {
+    let iv = window.crypto.getRandomValues(new Uint8Array(12));
+    let sharedKey = await window.crypto.subtle.importKey(
+        'raw',
+        stdAESKey(key),
+        { name: 'AES-GCM', length: 256 },
+        true,
+        ['encrypt']
+    );
+    let cipher = await window.crypto.subtle.encrypt(
+        { name: 'AES-GCM', iv },
+        sharedKey,
+        new TextEncoder().encode(plaintext)
+    );
+    let ciphertext = new Uint8Array(cipher);
+    let encrypted = new Uint8Array(iv.length + ciphertext.byteLength);
+    encrypted.set(iv, 0);
+    encrypted.set(ciphertext, iv.length);
+    return uint8ArrayToHex(encrypted);
+}
+
+async function decrypt(ciphertext, key) {
+    let text = hexToUint8Array(ciphertext);
+    if (!text) return '';
+    let sharedKey = await window.crypto.subtle.importKey(
+        'raw',
+        stdAESKey(key),
+        { name: 'AES-GCM', length: 256 },
+        true,
+        ['decrypt']
+    );
+    let plaintext = await window.crypto.subtle.decrypt(
+        { name: 'AES-GCM', iv: text.slice(0, 12) },
+        sharedKey,
+        text.slice(12)
+    );
+    return new TextDecoder().decode(new Uint8Array(plaintext));
+}
+
+export default {
+    decrypt,
+    encrypt
+};