叮咚智能音箱開發 ,用C# 實現開通狀態回調解密教程


智能音箱是目前熱火的智能產品,有很多家企業推出自己的智能音箱,並且進行了開放平台,允許第三方開發者,基於開放平台進行應用開發,豐富自己產品功能。

  本人則購買一台 京東與訊飛合作的產品,叮咚智能音箱。並且在里面開發一個小應用“小軍找手機”,

但在開發過程中遇到一個坑,利用C#開發語言,實現叮咚開放平台 的加解密。因為叮咚平台是用JAVA加密,我主用C#語言。   

         平台在第三方應用中需要進行參數設置,見下圖,要求設置密鑰,即128個字符的字符串。因官方采用JAVA語言開發,如果第三方應用采用.NET 開發,則按頁面中的JAVA的方式無法正確解密回明文的state ,即json:{"userid":"用戶標識","operation":"oauth","timestamp":"時間戳,毫秒","appid":"應用的APPID"} 。這段字符串的反解。

  

      經過群里伙伴的幫助,終於實現反解。現將教程公布如下:

      再次感謝 群中 @SuperCokou  @智家e物聯 @華仔愛技術 

最重要的https://yq.aliyun.com/articles/2513  本頁的原創者      華仔愛技術 

 

官方應用對state參數的解密過程

 1.應用將接收到的數據進行Url解碼,state_base64 = UrlDecoder.decode(state,"UTF-8")

 2.應用將解碼后到的數據進行Base64解碼 state_mi = Base64.decode(state_base64)

 3.應用使用應用配置的AesKey秘鑰進行數據的解密 state = AES.decrypt(state_mi,AesKey)

 

  應用.NET進行參數解密的過程

1.用附的JAVA代碼 見下,將代碼中key='12345578 中的變量key ,替換成你自己所用的回調地址參數秘鑰,即參數配置中的秘鑰。

2.在DOS環境,運行javac  TestGenAESByteKey和java TestGenAESByteKey   然后得到類似這種的字符串 a0UcXq pLnhoWpzpHYcl1+A==  

  以上兩步,在第三方應用的代碼方法之外使用,因為一些底層加密的原因,具體的不作討論。

3.下面 C# 代碼 Decrypt方法 反解出 state。這部分在第三方應用中

 

 

附JAVA代碼:

 

import java.io.UnsupportedEncodingException;

import java.security.NoSuchAlgorithmException;

 

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;

 

import sun.misc.BASE64Encoder;

 

public class TestGenAESByteKey{

 

/**

 * @param args

 * @throws UnsupportedEncodingException

 * @throws NoSuchAlgorithmException

 */

public static void main(String[] args) throws UnsupportedEncodingException, NoSuchAlgorithmException {

 

    String key="12345678123456768123456781234567681234567812345676812345678123456768123456781234567681234567812345676812345678123456768123456781";

    KeyGenerator kgen = KeyGenerator.getInstance("AES");

            java.security.SecureRandom random = java.security.SecureRandom.getInstance("SHA1PRNG");

            random.setSeed(key.getBytes());

            kgen.init(128, random);  

            SecretKey secretKey = kgen.generateKey();

            byte[] enCodeFormat = secretKey.getEncoded();

            BASE64Encoder coder = new BASE64Encoder();

            System.out.println(coder.encode(enCodeFormat));

}

 

 

 

}

 

附C#代碼

/// <summary>

/// 服務開啟關閉回調

/// </summary>

/// <param name="state"></param>

/// <returns></returns>

public ContentResult OpenService(string state)

{

            

         string state_base64 = HttpUtility.UrlDecode(state,Encoding.UTF8);

         String decrypt_state = Decrypt(state_base64);

         ///下面為具體的業務邏輯

}

 

private static string Decrypt(string toDecrypt)

        {

            byte[] keyArray =  Convert.FromBase64String(@"a0UcbepLnhoWpzpHYcl1+A==");

            byte[] inputBuffer = Convert.FromBase64String(toDecrypt);

            RijndaelManaged rDel = new RijndaelManaged();

            rDel.Key = keyArray;

            rDel.Mode = CipherMode.ECB;

            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateDecryptor();

 

            byte[] resultArray = cTransform.TransformFinalBlock(inputBuffer, 0, inputBuffer.Length);

 

            return Encoding.UTF8.GetString(resultArray);

        }

 

 

 

 

 

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智能音箱

[王老師玩ESP32系列]第十四課,ESP32使用RTOS之任務傳參

By  物物互動2017.9.30 10:44

 

 

 

/* structure that hold data*/
typedef struct{
  int sender;
  int counter;
}Data;

/* this variable hold queue handle */
xQueueHandle xQueue;

void setup() {

  Serial.begin(112500);
  /* create the queue which size can contains 5 elements of Data */
  xQueue = xQueueCreate(5, sizeof(Data));
  xTaskCreate(
      sendTask1,           /* Task function. */
      "sendTask1",        /* name of task. */
      10000,                    /* Stack size of task */
      NULL,                     /* parameter of the task */
      2,                        /* priority of the task */
      NULL);                    /* Task handle to keep track of created task */
  xTaskCreate(
      sendTask2,           /* Task function. */
      "sendTask2",        /* name of task. */
      10000,                    /* Stack size of task */
      NULL,                     /* parameter of the task */
      2,                        /* priority of the task */
      NULL);                    /* Task handle to keep track of created task */
  xTaskCreate(
      receiveTask,           /* Task function. */
      "receiveTask",        /* name of task. */
      10000,                    /* Stack size of task */
      NULL,                     /* parameter of the task */
      1,                        /* priority of the task */
      NULL);                    /* Task handle to keep track of created task */
}

void loop() {

}

void sendTask1( void * parameter )
{
  /* keep the status of sending data */
  BaseType_t xStatus;
  /* time to block the task until the queue has free space */
  const TickType_t xTicksToWait = pdMS_TO_TICKS(100);
  /* create data to send */
  Data data;
  /* sender 1 has id is 1 */
  data.sender = 1;
  data.counter = 1;
  for(;;){
    Serial.println("sendTask1 is sending data");
    /* send data to front of the queue */
    xStatus = xQueueSendToFront( xQueue, &data, xTicksToWait );
    /* check whether sending is ok or not */
    if( xStatus == pdPASS ) {
      /* increase counter of sender 1 */
      data.counter = data.counter + 1;
    }
    /* we delay here so that receiveTask has chance to receive data */
    delay(1000);
  }
  vTaskDelete( NULL );
}
/* this task is similar to sendTask1 */
void sendTask2( void * parameter )
{
  BaseType_t xStatus;
  const TickType_t xTicksToWait = pdMS_TO_TICKS(100);
  Data data;
  data.sender = 2;
  data.counter = 1;
  for(;;){
    Serial.println("sendTask2 is sending data");
    xStatus = xQueueSendToFront( xQueue, &data, xTicksToWait );
    if( xStatus == pdPASS ) {
      data.counter = data.counter + 1;
    }
    delay(1000);
  }
  vTaskDelete( NULL );
}
void receiveTask( void * parameter )
{
  /* keep the status of receiving data */
  BaseType_t xStatus;
  /* time to block the task until data is available */
  const TickType_t xTicksToWait = pdMS_TO_TICKS(100);
  Data data;
  for(;;){
    /* receive data from the queue */
    xStatus = xQueueReceive( xQueue, &data, xTicksToWait );
    /* check whether receiving is ok or not */
    if(xStatus == pdPASS){
      /* print the data to terminal */
      Serial.print("receiveTask got data: ");
      Serial.print("sender = ");
      Serial.print(data.sender);
      Serial.print(" counter = ");
      Serial.println(data.counter);
    }
  }
  vTaskDelete( NULL );
}


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