HarmonyOS SM4-ECB-NoPadding加密

参考：

async function SM4ECBNoPadding(key:string){
  let symKeyGenerator = cryptoFramework.createSymKeyGenerator('SM4_128');
  let symKey = await symKeyGenerator.convertKey({ data:stringToUint8Array(key) });//128对应16长度字节数组
  let mode = cryptoFramework.CryptoMode.ENCRYPT_MODE;
  let cipher = cryptoFramework.createCipher('SM4_128|ECB|Nopadding');
  await cipher.init(mode, symKey, null);
  //开始加密
  let text = "测试文本";
  let updateOutput = await cipher.doFinal({ data: stringToUint8Array(text) });
  let res = updateOutput.data;
  //转成base64或者十六进制后传给后端
  let strHex = buffer.from(res).toString('hex')
  let strBase = new util.Base64Helper().encodeToStringSync(res)
}

// 字符串转成字节流
export function stringToUint8Array(str: string) {
  return new Uint8Array(buffer.from(str,'utf-8').buffer);
}

/*
* SM4 ECB 解密
* */
async function SM4ECBNoPaddingdecrypt(plantext:string,key:string){
  let symKeyGenerator = cryptoFramework.createSymKeyGenerator('SM4_128');
  let symKey = await symKeyGenerator.convertKey({ data:stringToUint8Array(key) });//128对应16长度字节数组
  let mode = cryptoFramework.CryptoMode.DECRYPT_MODE;
  let cipher = cryptoFramework.createCipher('SM4_128|ECB|NoPadding');
  await cipher.init(mode, symKey, null);

  let updateOutput = await cipher.doFinal({ data: new util.Base64Helper().decodeSync(plantext) });
  let res = updateOutput.data;
  console.log("res ==> "+ uint8ArrayToString(res))
}

注意：使用NoPadding填充方式要求明文字节数组和密钥一样长，建议使用PKCS7填充算法