HarmonyOS 鸿蒙Next 3des加密中文字符串结果不一致，英文数字正确

import { cryptoFramework } from '[@kit](/user/kit).CryptoArchitectureKit';
import { buffer, util } from '[@kit](/user/kit).ArkTS';

[@Entry](/user/Entry)
[@Component](/user/Component)
struct TDes3Crypto {
  [@State](/user/State) message: string = '点击开始';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            DES3Crypto()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}

// 加密消息
function encryptMessage(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('3DES192|CBC|PKCS5');
  let iv = genIvParamsSpec();
  cipher.initSync(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, iv);
  let encryptData = cipher.doFinalSync(plainText);
  return encryptData;
}
// 解密消息
function decryptMessage(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {
  let decoder = cryptoFramework.createCipher('3DES192|CBC|PKCS5');
  let iv = genIvParamsSpec();
  decoder.initSync(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, iv);
  let decryptData = decoder.doFinalSync(cipherText);
  return decryptData;
}
function genSymKeyByData(symKeyData: Uint8Array) {
  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };
  let symGenerator = cryptoFramework.createSymKeyGenerator('xxx');
  let symKey = symGenerator.convertKeySync(symKeyBlob);
  console.info('convertKey success');
  return symKey;
}

function genIvParamsSpec() {
  let iv = new Uint8Array(buffer.from('xxx', 'utf-8').buffer);
  let dataIv = new Uint8Array(iv);

  let ivBlob: cryptoFramework.DataBlob = { data: dataIv };
  let ivParamsSpec: cryptoFramework.IvParamsSpec = {
    algName: "IvParamsSpec",
    iv: ivBlob
  };
  return ivParamsSpec;
}
function DES3Crypto() {
  let base64 = new util.Base64Helper()

  let key = "xxx";

  let u8a = new Uint8Array(buffer.from(key, 'utf-8').buffer)

  let symKey = genSymKeyByData(u8a);
  let str: string = "12345去问人体qwert";

  let message = "123456";
  let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(str, 'utf-8').buffer) };
  let encryptText = encryptMessage(symKey, plainText);
  let base64en = base64.encodeToStringSync(encryptText.data)
  console.info('decrypt ok      '+ base64en) ;

  let decryptText = decryptMessage(symKey, encryptText);
  console.info('decrypt ok');
  console.info('decrypt plainText: ' + buffer.from(decryptText.data).toString('utf-8'));
}

也可以使用在线加解密验证 【 https://the-x.cn/cryptography/TripleDes.aspx 】