Perl - securing web services using SSL/TLS encryption

 Hi, Tooday program is a Mojolicious application written in Perl, which demonstrates how to use SSL/TLS encryption for secure communication and authentication/authorization for API endpoints. The program listens on port 443 using SSL/TLS encryption, and provides a login endpoint that checks if the given username and password are correct. If the login is successful, the program returns a JSON response indicating success.

The program also includes an authorization middleware that checks if the client certificate is provided for API endpoints. If the client certificate is not provided, the program returns a JSON response indicating that the access is forbidden. Finally, the program provides an example API endpoint that returns some example data as a JSON response.

use Mojolicious::Lite;

# SSL/TLS encryption

app->config(

  hypnotoad => {

    listen => [

      'https://*:443?cert=/path/to/cert.pem&key=/path/to/key.pem'

    ]

  }

);



# Authentication

post '/api/login' => sub {

  my $c = shift;

  my $username = $c->param('username');

  my $password = $c->param('password');

  if ($username eq 'user' && $password eq 'pass') {

    $c->render(json => { success => 1 });

  } else {

    $c->render(json => { error => 'Unauthorized' }, status => 401);

  }

};



# Authorization

under '/api' => sub {

  my $c = shift;

  my $client_cert = $c->tx->connection->cert;

  if (!$client_cert) {

    $c->render(json => { error => 'Forbidden' }, status => 403);

    return;

  }

};



# Example API route

get '/api/example' => sub {

  my $c = shift;

  $c->render(json => { example => 'data' });

};



app->start;

Above code uses SSL/TLS encryption to secure the communication between the server and the client. The config method sets the hypnotoad configuration, which specifies the SSL/TLS certificate and key files. You should replace /path/to/cert.pem and /path/to/key.pem with the actual paths to your certificate and key files.

The under route modifier /api checks the client certificate sent by the client with every request. If the client certificate is not present, the server returns a 403 Forbidden error.

Note that this code does not use authentication or authorization methods, as they are not directly related to SSL/TLS encryption. However, you can add these methods as shown in the previous examples to further secure your Perl web services.