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import type { AESBase } from "./aes_base.ts";import type { BlockCiperConfig } from "./common.ts";
function base64(m: Uint8Array) {  return btoa(String.fromCharCode.apply(null, [...m])).replace(/=/g, "");}
export class WebCryptoAES implements AESBase {  protected key: Uint8Array;  protected config: BlockCiperConfig;  protected wkey: any = null; // WebCrypto Key
  constructor(    key: Uint8Array,    config: BlockCiperConfig,  ) {    this.key = key;    this.config = config;  }
  protected async loadKey() {    if (this.wkey === null) {      // @ts-ignore      this.wkey = await crypto.subtle.importKey(        "jwk",        { kty: "oct", k: base64(this.key) },        "AES-CBC",        true,        ["encrypt", "decrypt"],      );    }
    return this.wkey;  }
  async encrypt(m: Uint8Array) {    const key = await this.loadKey();    const option = { name: "AES-CBC", iv: this.config.iv };
    // @ts-ignore    const data = await crypto.subtle.encrypt(option, key, m);    return new Uint8Array(data);  }
  async decrypt(m: Uint8Array) {    const key = await this.loadKey();    const option = { name: "AES-CBC", iv: this.config.iv };
    // @ts-ignore    const data = await crypto.subtle.decrypt(option, key, m);    return new Uint8Array(data);  }}