Has anyone had problems with your Nodemcu and Firebase connection?

[filactito]

Hi. Has anyone had problems with your Nodemcu and Firebase connection? everything worked correctly until today.

Is someone having this problem?

[Daniel-Moraes]

Yes, I cant connect..

[adamrabbani]

firebase has new fingerprint => 6F D0 9A 52 C0 E9 E4 CD A0 D3 02 A4 B7 A1 92 38 2D CA 2F 26

just edit this file, FirebaseHttpClient.h

[filactito]

Works correctly !! Thank you @adamrabbani :)

[Daniel-Moraes]

Thank you so much @adamrabbani !!!!!!!!!!!!!!!!!!!!

[ExploreLab]

@adamrabbani Thank you so much

[HugoLimon]

Damm!! Thank you a lot bro

[mobizt]

This is my own solutions to handle the fingerprint changes Solution 1

1. Create php file on web server that will provide firebaseio.com fingerprint via get request which the host to get fingerprint is test.firebaseio.com

2. Modify FirebaseHttpClient_Esp8266.cpp from line no. 22

 public:
  FirebaseHttpClientEsp8266() {}

to

public:
 String fingerprint;
  FirebaseHttpClientEsp8266() {
	http_.begin("http://{YOUR WEB SERVER}.com/fingerprint.php?host=test.firebaseio.com");
	int httpCode = http_.GET();
	if (httpCode == HTTP_CODE_OK)
		fingerprint = http_.getString();
	http_.end();
  }

and from line no. 46

void begin(const std::string& url) override {
    http_.begin(url.c_str(), kFirebaseFingerprint);
  }

  void begin(const std::string& host, const std::string& path) override {
    http_.begin(host.c_str(), kFirebasePort, path.c_str(), kFirebaseFingerprint);
  }

to

 void begin(const std::string& url) override {
    http_.begin(url.c_str(), fingerprint);
  }

  void begin(const std::string& host, const std::string& path) override {
    http_.begin(host.c_str(), kFirebasePort, path.c_str(), fingerprint);
  }

This is fingerprint.php file

<?php
	
# PHP SSL Fingerprint Checker written by W. Al Maawali  
# (c) 2013 Founder of Eagle Eye Digital Solutions
# http://www.digi77.com
# http://www.om77.net
# script starts here:
# Usage: http://www.yourdomain.com/sslf.php
# Example: http://www.digi77.com/software/fingerprint/fp-public.php?hosts=www.facebook.com

//avoid timeouts
set_time_limit(0);

//For String variable use prevent sql injections
function StringInputCleaner($data)
{
	$data = trim($data); 
	$data = stripslashes($data); 
	$data=(filter_var($data, FILTER_SANITIZE_STRING));
	return $data;
}	

function getSllCertificate($hostname, $port = 443)
{
	$context = stream_context_create(array("ssl" => array("capture_peer_cert" => true)));
	$socket = @stream_socket_client("ssl://$hostname:$port", $errno, $errstr, ini_get("default_socket_timeout"), STREAM_CLIENT_CONNECT, $context);
 
	if(!$socket)
		return array("md5" => "error", "sha1" => "error");
 
	$contextdata = stream_context_get_params($socket);
	$contextparams = $contextdata['options']['ssl']['peer_certificate'];
 
	fclose($socket);
 
	openssl_x509_export($contextparams, $cert, true);
	openssl_x509_free($contextparams);
 
	$repl = array("\r", "\n", "-----BEGIN CERTIFICATE-----", "-----END CERTIFICATE-----");
	$repw = array("", "", "", "");
 
	$cert = str_replace($repl, $repw, $cert);
 
	$decoded = base64_decode($cert);
	$fingerprints = array(
		"md5" => md5($decoded),
		"sha1" => sha1($decoded),
	);
	
	
	return $fingerprints ;
}

$host=$_GET['host'];
//clean string safer coding
$host=StringInputCleaner($host);
$port=443;
$hashes = getSllCertificate($host, $port);

echo($hashes['sha1']);

?>

Solution 2

Bypass the finger print verification in WiFiClientSecure.cpp in C:\Users{YOUR NAME}\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.0\libraries\ESP8266WiFi\src

from line no. 630 to

bool WiFiClientSecure::verify(const char* fp, const char* domain_name)
{
return trure;

[turbo105]

@adamrabbani GOD BLESS!!!!!! We have a project due on monday (3 days from this post) and randomly our firebase started failing. God bless you, God bless your family, god bless your ancestors.

[stlcool]

@adamrabbani jesus christ god bless indeed. That was really scary. Whats the scoop on this?

[arkochatterjee]

@adamrabbani I have changed the fingerprint, but it's still not working. Did I miss anything?

[JaysArtworks]

@arkochatterjee I've the same issue...but the fingerprint for me is already correct.

[santoshn547]

I have the same issue. I changed the fingerprint, but its still not working, It begins connection and starts streaming. Then Unable to get/read Data from firebase and firebase Stream is failing. Tried updating ArduinoJson as well no use.

Does Anyone know the solution ?

[hammad42]

hi @adamrabbani hope you doing well can you plz tell that where i found firebasehttp.client.h. your answer would be highly appreciated

[santoshn547]

@hammad42
You can find that file inside libraries folder of Arduino. Libraries-> firebase-arduino-master -> src-> firebasehttp.client.h

[hammad42]

thankyou @santoshn547 but finger print is already same as above which is wrote by @adamrabbani

[hammad42]

@santoshn547 if you found any success plz share it with me i have submit my fyp project and i stuck on this my code was works fine then this shit happens..

[hammad42]

@JaysArtwork did you find any success..

[santoshn547]

@hammad42 Even I haven't found any solution !

[JaysArtworks]

@hammad42 I did not find any solution...damn

[hammad42]

Ok @JaysArtworks@Santoshn547 do one thing download old library and go to firebase http client.h and edit finger print as above adamrabbani shows

[kimleng-ly]

@adamrabbani @ Thank you very much my friend. You save my project. I have try many weeks ago. Now it work fine. Many many thank.

[kimleng-ly]

@adamrabbani @ how can we know that firebase change that? If later firebase change again, where can we find it?

[mobizt]

@kimleng-ly you can check fingerprint through this site https://www.grc.com/fingerprints.htm?domain=yourdatabase.firebaseio.com

For test you can use https://www.grc.com/fingerprints.htm?domain=test.firebaseio.com.

If you read my post above, solution 1 (if you have PHP skill) is for automatically update fingerprint when your device start to connect to firebase.

In case of you want to bypass fingerprint checking please see solution 2 of my previous post.

[kimleng-ly]

@mobizt Many thank my friend. You save a lot time for me to search it. Thank.

[AlexPivo]

Good day, replaced the code, the application runs 2-3 minutes, after writing: DB failed. What is the solution ?

---

6F D0 9A 52 C0 E9 E4 CD A0 D3 02 A4 B7 A1 92 38 2D CA 2F 26

file FirebaseHttpClient.h edited

[mobizt]

@AlexPivo If you want to by pass fingerprint verification, write "return true;" first inside the function and no need to edit finger print in FirebaseHttpClient.h.

bool WiFiClientSecure::verify(const char* fp, const char* domain_name)
{
    return true; //<--- here

    if (!_ssl) {
        return false;
    }

[AlexPivo]

Thanks, it's working. Works 2-3 minutes, then error. Crash controller (freezes controller ) and start working again in 2-3 minutes.

p.s. Error not writes: DB failed

[pcliu624]

the library should be inside the Document/Arduino/libraries, not the program files, it should be the same file of your project saved in. This works for me.

[proppy]

Can you confirm that was fixed with https://github.com/firebase/firebase-arduino/pull/368 ?

[AlexPivo]

@mobizt Good day, it's working. The problem was wi-Fi.

option 2: Bypass the finger print verification in WiFiClientSecure.cpp in C:\Users{YOUR NAME}\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.0\libraries\ESP8266WiFi\src

bool WiFiClientSecure::verify(const char* fp, const char* domain_name) { return true; //<--- here

if (!_ssl) {
    return false;
}

---

Thanks!