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Node.js tlsSocket.authorizationError Property
  • Last Updated : 23 Sep, 2020

The tlsSocket.authorizationError property is an inbuilt application programming interface of class TLSSocket within tls module which is used to get the reason why the peer’s certificate was not been verified. 

Syntax:

const tlsSocket.authorizationError

Parameters: This method does not accept any parameter.

Return Value: This method returns the reason why the peer’s certificate was not been verified.

How to generate private key and public certificate?



  • Private Key
    Step 1: Open notepad and copy paste the following key:
    -----BEGIN RSA PRIVATE KEY-----
    MIICXQIBAAKBgQC38R9wXcUbhOd44FavgmE5R3K4JeYOHLnI7dUq1B8/Gv7l3SOg
    JKef/m9gM1KvUx951mapXGtcWgwB08J3vUE2YOZ4tWJArrVZES0BI/RmFAyhQFP5
    HcWl3LSM9LRihP98F33oIkKaCxA5LxOrkgpV4HrUzIKTABDYah7RPex1WQIDAQAB
    AoGBAIXR71xxa9gUfc5L7+TqBs+EMmrUb6Vusp8CoGXzQvRHMJCMrMFySV0131Nu
    o0YYRDsAh1nJefYLMNcXd1BjqI+qY8IeRsxaY+9CB2KKGVVDO2uLdurdC2ZdlWXT
    Vwr3dDoyR0trnXJMmH2ijTeO6bush8HuXxvxJBjvEllM5QYxAkEA3jwny9JP+RFu
    0rkqPBe/wi5pXpPl7PUtdNAGrh6S5958wUoR4f9bvwmTBv1nQzExKWu4EIp+7vjJ
    fBeRZhnBvQJBANPjjge8418PS9zAFyKlITq6cxmM4gOWeveQZwXVNvav0NH+OKdQ
    sZnnDiG26JWmnD/B8Audu97LcxjxcWI8Jc0CQEYA5PhLU229lA9EzI0JXhoozIBC
    TlcKFDuLm88VSmlHqDyqvF9YNOpEdc/p2rFLuZS2ndB4D+vu6mjwc5iZ3HECQCxy
    GBHRclQ3Ti9w76lpv+2kvI4IekRMZWDWnnWfwta+DGxwCgw2pfpleBZkWqdBepb5
    JFQbcxQJ0wvRYXo8qaUCQQCgTvWswBj6OTP7LTvBlU1teAN2Lnrk/N5AYHZIXW6m
    nUG9lYvH7DztWDTioXMrruPF7bdXfZOVJD8t0I4OUzvC
    -----END RSA PRIVATE KEY-----

    Step 2: Save as private-key.pem

  • Public Certificate
    Step 1: Open notepad and copy paste the following key:
    -----BEGIN CERTIFICATE-----
    MIICfzCCAegCCQDxxeXw914Y2DANBgkqhkiG9w0BAQsFADCBgzELMAkGA1UEBhMC
    SU4xEzARBgNVBAgMCldlc3RiZW5nYWwxEDAOBgNVBAcMB0tvbGthdGExFDASBgNV
    BAoMC1BhbmNvLCBJbmMuMRUwEwYDVQQDDAxSb2hpdCBQcmFzYWQxIDAeBgkqhkiG
    9w0BCQEWEXJvZm9mb2ZAZ21haWwuY29tMB4XDTIwMDkwOTA1NTExN1oXDTIwMTAw
    OTA1NTExN1owgYMxCzAJBgNVBAYTAklOMRMwEQYDVQQIDApXZXN0YmVuZ2FsMRAw
    DgYDVQQHDAdLb2xrYXRhMRQwEgYDVQQKDAtQYW5jbywgSW5jLjEVMBMGA1UEAwwM
    Um9oaXQgUHJhc2FkMSAwHgYJKoZIhvcNAQkBFhFyb2ZvZm9mQGdtYWlsLmNvbTCB
    nzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAt/EfcF3FG4TneOBWr4JhOUdyuCXm
    Dhy5yO3VKtQfPxr+5d0joCSnn/5vYDNSr1MfedZmqVxrXFoMAdPCd71BNmDmeLVi
    QK61WREtASP0ZhQMoUBT+R3Fpdy0jPS0YoT/fBd96CJCmgsQOS8Tq5IKVeB61MyC
    kwAQ2Goe0T3sdVkCAwEAATANBgkqhkiG9w0BAQsFAAOBgQATe6ixdAjoV7BSHgRX
    bXM2+IZLq8kq3s7ck0EZrRVhsivutcaZwDXRCCinB+OlPedbzXwNZGvVX0nwPYHG
    BfiXwdiuZeVJ88ni6Fm6RhoPtu2QF1UExfBvSXuMBgR+evp+e3QadNpGx6Ppl1aC
    hWF6W2H9+MAlU7yvtmCQQuZmfQ==
    -----END CERTIFICATE-----

    Step 2: Save as public-cert.pem

Example 1: Filename: index.js




// Node.js program to demonstrate the
// tlsSocket.authorizationError method
var tls = require('tls'),
    fs = require('fs'),
  
// Port and host address for server    
PORT = 1337,
HOST = '127.0.0.1',
value = null;
   
// Private key and public certificate for acess
var options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('public-cert.pem'),
  rejectUnauthorized: false
};
  
// Creating and intializing server
var server = tls.createServer(options, function(socket) {
  
  // Print the data that we received
  socket.on('data', function(data) {
  
      console.log('\nReceived: %s ',
      data.toString().replace(/(\n)/gm, ""));
  });
  
  // Stopping the server
  // by using the close() method
  server.close(() => {
    console.log("Server closed successfully");
  });
});
  
// Start listening on a specific port and address
// by using listen() method
server.listen(PORT, HOST, function() {
   console.log("I'm listening at %s, on port %s", HOST, PORT);
});
  
// Creating and intializing client
var client = tls.connect(PORT, HOST, options, function() {
    
  // Getting the authorizationError of the socket
  // by using tlsSocket.authorizationError method
  value = client.authorizationError;
  console.log("authorizationError : " + value);
    
  client.end(() => {
     console.log("Client closed successfully");
  });
});

Run the index.js file using the following command:

node index.js

Output:

I'm listening at 127.0.0.1, on port 1337
authorizationError : DEPTH_ZERO_SELF_SIGNED_CERT
Client closed successfully
Server closed successfully

Example 2: Filename: index.js




// Node.js program to demonstrate the
// tlsSocket.authorizationError method
var tls = require('tls'),
    fs = require('fs'),
  
// Port and host address for server    
PORT = 1337,
HOST = '127.0.0.1';
   
// Private key and public certificate for acess
var options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('public-cert.pem'),
  rejectUnauthorized: false
};
  
// Creating and intializing server
var server = tls.createServer(options, function(socket) {
  
  // Getting the authorizationError of the socket
  // by using tlsSocket.authorizationError method
  const value = socket.authorizationError;
  
  socket.write("authorizationError : " + value);
  
  // Stopping the server
  // by using the close() method
  server.close();
});
  
// Close event
server.on('close', () => {
   console.log("Server closed successfully");
})
  
// Start listening on a specific port and address
// by using listen() method
server.listen(PORT, HOST, function() {
   console.log("I'm listening at %s, on port %s", HOST, PORT);
});
  
// Creating and intializing client
var client = tls.connect(PORT, HOST, options, function() {
   console.log("client is connected");
});
  
client.on("data", function(data) {
  
  console.log('Received: %s',
  data.toString().replace(/(\n)/gm, ""));
  
  // Close the connection after receiving the message
  client.end(() => {
     console.log("client closed successfully")
  });
  
});

Run the index.js file using the following command:

node index.js

Output:

I'm listening at 127.0.0.1, on port 1337
client is connected
Received: authorizationError : null
client closed successfully
Server closed successfully

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/tls.html#tls_tlssocket_authorizationerror

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