Favivon - Correção

node_modules/hls.js/src/crypt/fast-aes-key.ts

@@ -0,0 +1,39 @@
+import { DecrypterAesMode } from './decrypter-aes-mode';
+
+export default class FastAESKey {
+  private subtle: SubtleCrypto;
+  private key: ArrayBuffer;
+  private aesMode: DecrypterAesMode;
+
+  constructor(
+    subtle: SubtleCrypto,
+    key: ArrayBuffer,
+    aesMode: DecrypterAesMode,
+  ) {
+    this.subtle = subtle;
+    this.key = key;
+    this.aesMode = aesMode;
+  }
+
+  expandKey() {
+    const subtleAlgoName = getSubtleAlgoName(this.aesMode);
+    return this.subtle.importKey(
+      'raw',
+      this.key,
+      { name: subtleAlgoName },
+      false,
+      ['encrypt', 'decrypt'],
+    );
+  }
+}
+
+function getSubtleAlgoName(aesMode: DecrypterAesMode) {
+  switch (aesMode) {
+    case DecrypterAesMode.cbc:
+      return 'AES-CBC';
+    case DecrypterAesMode.ctr:
+      return 'AES-CTR';
+    default:
+      throw new Error(`[FastAESKey] invalid aes mode ${aesMode}`);
+  }
+}