Projet control vidéo with Arduino and MD5 digest authentication.

[ludophot]

Bonjour,

I allow myself to ask my project because I need your skills.
I admire your work and use it for my personal projects
today I have a professional project: to link an alarm with video surveillance.

material available:
I have a set of Uniview PTZ cameras and an alarm system.

My project:
I would like to control the cameras from an arduino using the API.

API documentation:

https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:b8062a8f-f359-4a18-aa38-b8a2532a54cf

Problems:

“The API uses digest authentication” how to connect with this type of authentication ….

thank you

[Renzo Mischianti]

Hi Ludopot,

I found this implementation

 

#include <ArduinoHttpClient.h>
#include <MD5.h>
HttpClient client = HttpClient(wifiConnection, adress, port);
...
bool HttpSendDigest(String uri, String user, String password, String data)
{

  //Serial.println("HttpSendDigest::POST request");
  client.beginRequest();
  client.post(uri,"application/x-www-form-urlencoded",data);
  client.endRequest();


  String header ="";
  // read the status code and body of the response
  int statusCode = client.responseStatusCode();
  if (client.headerAvailable()){
    while(!client.endOfHeadersReached()){
      header = header + char(client.readHeader());
    }
  }
  String headerName = client.readHeaderName();
  String headerValue = client.readHeaderValue();
  String response = client.responseBody();
  /*
  Serial.println("HttpSendDigest::Headername: "+ headerName);
  Serial.println("HttpSendDigest::Headervalue: "+ headerValue);
  Serial.println("HttpSendDigest::header: ");
  Serial.println(header);
  Serial.print("HttpSendDigest::statuscode: ");
  Serial.println(statusCode);
  Serial.println("HttpSendDigest::response: ");
  Serial.println(response);
  */

  if (statusCode == 401 && headerName.equalsIgnoreCase("WWW-Authenticate"))
  {
      //Serial.println("HttpSendDigest::401+WWW-Authenticate detected");  
      String AuthMethod = headerValue.substring(0,headerValue.indexOf(' '));
      String realm = strGetValue(headerValue,"realm=\"","\"");
      String nonce = strGetValue(headerValue,"nonce=\"","\"");
      String qop = strGetValue(headerValue,"qop=\"","\"");
      /*
      Serial.println("HttpSendDigest::AuthMethod: "+AuthMethod);  
      Serial.println("HttpSendDigest::realm: "+realm);  
      Serial.println("HttpSendDigest::nonce: "+nonce);  
      Serial.println("HttpSendDigest::qop: "+qop);  
      */
      //Serial.print("HttpSendDigest::Calculate HA1...");  
      String HA1 = calcMD5(user+":"+realm+":"+password);
      //Serial.println(HA1);  

      //Serial.print("HttpSendDigest::Calculate HA2...");  
      String HA2 = calcMD5("POST:"+uri);
      //Serial.println(HA2);  

      String cnonce = String(random(8556822323));
      //Serial.println("HttpSendDigest::cnonce: "+cnonce);  
      //Serial.println("HttpSendDigest::Calculate authResponse...");  
      String authResponse =calcMD5(HA1+":"+nonce+":"+"00000001"+":"+cnonce+":"+qop+":"+HA2); //MD5(HA1:nonce:nonceCount:cnonce:qop:HA2)
      //Serial.println("HttpSendDigest::authResponse: "+authResponse);      

      String authHeaderString = "Authorization: Digest username=\"" + user +
                        "\",realm=\"" + realm +
                        "\",nonce=\"" + nonce +
                        "\",uri=\"" + uri +
                        "\",cnonce=\"" + cnonce +
                        "\",qop=auth, nc=00000001, response=\"" + authResponse + "\"";//\r\n";
      //Serial.println("HttpSendDigest::authHeaderString: "+authHeaderString);  
      
      //Serial.println("HttpSendDigest::---auth post---");
      client.beginRequest();
      client.post(uri);
      client.sendHeader(authHeaderString);
      client.sendHeader(HTTP_HEADER_CONTENT_TYPE, "application/x-www-form-urlencoded");
      client.sendHeader(HTTP_HEADER_CONTENT_LENGTH, data.length());
      client.beginBody();
      client.print(data);
      client.endRequest();
      
      //Serial.println("HttpSendDigest::---authresponse---");
      header ="";
      // read the status code and body of the response
      statusCode = client.responseStatusCode();
      if (client.headerAvailable()){
        while(!client.endOfHeadersReached()){
          header = header + char(client.readHeader());
        }
      }

      headerName = client.readHeaderName();
      headerValue = client.readHeaderValue();
      response = client.responseBody();
      /*
      Serial.println("HttpSendDigest::Headername: "+ headerName);
      Serial.println("HttpSendDigest::Headervalue: "+ headerValue);
      Serial.println("HttpSendDigest::header: ");
      Serial.println(header);
      Serial.print("HttpSendDigest::statuscode: ");
      Serial.println(statusCode);
      Serial.println("HttpSendDigest::response: ");
      Serial.println(response);
      */
  }
  if (statusCode==200)
  {
    return true;  
  }
  else
  {
    return false;
  }
  
}

than you must call like this

HttpSendDigest("/command.cgi",user,password,dataString)


But you must check if the software need HTTPS because Arduino not support that protocol.

 

Bye Renzo

[ludophot]

 

thank you ! I will test that. normally it is on port 80.

[toni]

Sorry, but where is the library

#include <MD5.h>

[Author]

Posts