Revert "feat: change AES mechanism to crypto-js"

This reverts commit a9ba144.

Author: MrTimeey

package-lock.json

@@ -45,9 +45,7 @@
     "@eslint/js": "^9.39.1",
     "@microsoft/api-extractor": "^7.54.0",
     "@microsoft/tsdoc": "^0.15.1",
-    "@types/crypto-js": "^4.2.2",
     "@types/node": "^24.10.0",
-    "crypto-js": "^4.2.0",
     "eslint": "^9.39.1",
     "eslint-config-prettier": "^10.1.8",
     "globals": "^16.5.0",

package.json

@@ -1,5 +1,5 @@
 import { http } from "./helper/http";
-import { decryptText } from "./crypto.js";
+import { aesDecryptHexWithKey } from "./crypto.js";
 
 const API_BASE = "https://everybody.codes/api";
 const CDN_BASE = "https://everybody-codes.b-cdn.net/assets";
@@ -100,7 +100,8 @@ export class EverybodyCodesClient {
     (["1", "2", "3"] as const).forEach((p) => {
       const hex = encrypted[p];
       const key = keys[p];
-      if (hex && key) out[Number(p) as 1 | 2 | 3] = decryptText(key, hex);
+      if (hex && key)
+        out[Number(p) as 1 | 2 | 3] = aesDecryptHexWithKey(key, hex);
     });
     return out;
   }

src/client.ts

@@ -1,13 +1,20 @@
-import CryptoJS from "crypto-js";
+import crypto from "node:crypto";
 
-export const decryptText = (key: string, text: string) => {
-  const cipherParams = CryptoJS.lib.CipherParams.create({
-    ciphertext: CryptoJS.enc.Hex.parse(text),
-  });
+export function aesDecryptHexWithKey(key: string, hexCipher: string): string {
+  const keyBytes = Buffer.from(key, "utf8");
+  const iv = Buffer.from(key.substring(0, 16), "utf8");
+  const cipherBytes = Buffer.from(hexCipher, "hex");
 
-  const keyWA = CryptoJS.enc.Utf8.parse(key);
-  const ivWA = CryptoJS.enc.Utf8.parse(key.substring(0, 16));
+  const algo =
+    keyBytes.length === 16
+      ? "aes-128-cbc"
+      : keyBytes.length === 24
+        ? "aes-192-cbc"
+        : keyBytes.length === 32
+          ? "aes-256-cbc"
+          : "aes-256-cbc";
 
-  const decrypted = CryptoJS.AES.decrypt(cipherParams, keyWA, { iv: ivWA });
-  return decrypted.toString(CryptoJS.enc.Utf8);
-};
+  const dec = crypto.createDecipheriv(algo, keyBytes, iv);
+  const out = Buffer.concat([dec.update(cipherBytes), dec.final()]);
+  return out.toString("utf8");
+}

src/crypto.ts

@@ -1,14 +1,11 @@
-import CryptoJS from "crypto-js";
+import crypto from "crypto";
 
-export const createEncryptedHex = (key: string, input: string): string => {
-  const keyWA = CryptoJS.enc.Utf8.parse(key);
-  const ivWA = CryptoJS.enc.Utf8.parse(key.substring(0, 16));
-
-  const encrypted = CryptoJS.AES.encrypt(input, keyWA, {
-    iv: ivWA,
-    mode: CryptoJS.mode.CBC,
-    padding: CryptoJS.pad.Pkcs7,
-  });
-
-  return encrypted.ciphertext.toString(CryptoJS.enc.Hex);
+export const createEncryptedHex = (key: string, input: string) => {
+  const iv = Buffer.from(key.substring(0, 16), "utf8");
+  const cipher = crypto.createCipheriv(
+    "aes-128-cbc",
+    Buffer.from(key, "utf8"),
+    iv,
+  );
+  return cipher.update(input, "utf8", "hex") + cipher.final("hex");
 };