HarmonyOS 鸿蒙Next 3DES的key长度不符合

3des的key长度超过24的话只能使用三方库crypto-js 来实现这个32位密钥长度的加解密能力 以下为crypto-js的代码3des cbc demo实例

import CryptoJS from '@ohos/crypto-js'

@Entry

@Component

struct TDes3Crypto {

  @State message: string = '点击开始';

  build() {

    Row() {

      Column() {

        Text(this.message)

          .fontSize(50)

          .fontWeight(FontWeight.Bold)

          .onClick(() => {

            DES3Crypto()

          })

      }

      .width('100%')

    }

    .height('100%')

  }

}

function DES3Crypto() {

  let str: string = "2011536858";

  let key: string = "040cb7f97484de8ade3e0cce9ac52396";

  let UTF8key: string = CryptoJS.enc.Hex.parse(key);

  let encrypted: string = CryptoJS.TripleDES.encrypt(str, UTF8key, {

    mode: CryptoJS.mode.CBC,

    padding: CryptoJS.pad.Pkcs5,

    iv: CryptoJS.enc.Hex.parse('202012$6')

  }).ciphertext.toString(CryptoJS.enc.Base64);

  console.log("...TripleDES encrypt:" + encrypted);

  let decrypted: string = CryptoJS.TripleDES.decrypt(encrypted, UTF8key, {

    mode: CryptoJS.mode.CBC,

    padding: CryptoJS.pad.Pkcs5,

    iv: CryptoJS.enc.Hex.parse('202012$6')

  }).toString(CryptoJS.enc.Utf8);

  console.log("...TripleDES decrypt:" + decrypted);

}