鸿蒙3DES解密

private static async desDecode(response: AxiosResponse<string, string>) {

  let keyData = stringToUint8Array(NetConstants.KEY_DES3);

  let symKey = await genSymKeyByData(keyData);

  let base64 = new util.Base64Helper();

  let encryptoMessage = base64.decodeSync(response.data);

  let encryptoMes: cryptoFramework.DataBlob = { data: new Uint8Array(encryptoMessage) };

  let decryptText = decryptMessage(symKey, encryptoMes);

  let decodeResult = buffer.from(decryptText.data).toString('utf-8');

  return decodeResult;

}

async function genSymKeyByData(symKeyData: Uint8Array) {

  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };

  let symGenerator = cryptoFramework.createSymKeyGenerator('3DES192');

  let symKey = await symGenerator.convertKey(symKeyBlob);

  console.info('convertKey success');

  return symKey;

}

// 解密消息

function decryptMessage(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {

  let decoder = cryptoFramework.createCipher('3DES192|ECB|PKCS7');

  decoder.initSync(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, null);

  let decryptData = decoder.doFinalSync(cipherText);

  return decryptData;

}

// 字符串转成字节流

function stringToUint8Array(str: string) {

  return new Uint8Array(buffer.from(str, 'utf-8').buffer);

}