flo-bit.dev
[READ-ONLY] Mirror of https://github.com/flo-bit/skywatched. review movies and tv shows, based on at proto
skywatched.app
1.5 kB
49 lines
1// Code by @pilcrowonpaper on GitHub: https://gist.github.com/pilcrowonpaper/353318556029221c8e25f451b91e5f76
2// AES128 with the Web Crypto API.
3async function encrypt(key: Uint8Array, data: Uint8Array): Promise<Uint8Array> {
4 const iv = new Uint8Array(16);
5 crypto.getRandomValues(iv);
6 const cryptoKey = await crypto.subtle.importKey('raw', key, 'AES-GCM', false, ['encrypt']);
7 const cipher = await crypto.subtle.encrypt(
8 {
9 name: 'AES-GCM',
10 iv,
11 tagLength: 128
12 },
13 cryptoKey,
14 data
15 );
16 const encrypted = new Uint8Array(iv.byteLength + cipher.byteLength);
17 encrypted.set(iv);
18 encrypted.set(new Uint8Array(cipher), iv.byteLength);
19 return encrypted;
20}
21
22export async function encryptString(key: Uint8Array, data: string): Promise<Uint8Array> {
23 const encoded = new TextEncoder().encode(data);
24 const encrypted = await encrypt(key, encoded);
25 return encrypted;
26}
27
28async function decrypt(key: Uint8Array, encrypted: Uint8Array): Promise<Uint8Array> {
29 if (encrypted.length < 16) {
30 throw new Error('Invalid data');
31 }
32 const cryptoKey = await crypto.subtle.importKey('raw', key, 'AES-GCM', false, ['decrypt']);
33 const decrypted = await crypto.subtle.decrypt(
34 {
35 name: 'AES-GCM',
36 iv: encrypted.slice(0, 16),
37 tagLength: 128
38 },
39 cryptoKey,
40 encrypted.slice(16)
41 );
42 return new Uint8Array(decrypted);
43}
44
45export async function decryptToString(key: Uint8Array, data: Uint8Array): Promise<string> {
46 const decrypted = await decrypt(key, data);
47 const decoded = new TextDecoder().decode(decrypted);
48 return decoded;
49}