laravel No supported encrypter found. The cipher and / or key length are invalid

Question 1

I am building a project using Laravel. It was working fine on localhost, but when I upload it to the server (the server has comodo ssl installed), I receive the following error:

RuntimeException in EncryptionServiceProvider.php line 29:
No supported encrypter found. The cipher and / or key length are invalid
in EncryptionServiceProvider.php line 29
at EncryptionServiceProvider->IlluminateEncryption{closure}(object(Application), array()) in Container.php line 733
at Container->build(object(Closure), array()) in Container.php line 626
at Container->make('encrypter', array()) in Application.php line 674
at Application->make('IlluminateContractsEncryptionEncrypter') in Container.php line 837
at Container->resolveClass(object(ReflectionParameter)) in Container.php line 800
at Container->getDependencies(array(object(ReflectionParameter)), array()) in Container.php line 771
at Container->build('SahraSalonHttpMiddlewareEncryptCookies', array()) in Container.php line 626
at Container->make('SahraSalonHttpMiddlewareEncryptCookies', array()) in Application.php line 674
at Application->make('SahraSalonHttpMiddlewareEncryptCookies') in Pipeline.php line 123
at Pipeline->IlluminatePipeline{closure}(object(Request)) in CheckForMaintenanceMode.php line 42
at CheckForMaintenanceMode->handle(object(Request), object(Closure))
at call_user_func_array(array(object(CheckForMaintenanceMode), 'handle'), array(object(Request), object(Closure))) in Pipeline.php line 124
at Pipeline->IlluminatePipeline{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 103
at Pipeline->then(object(Closure)) in Kernel.php line 118
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 86
at Kernel->handle(object(Request)) in index.php line 54

Can anyone help solve this error?

Question 2

Do you have all the necessary extensions installed on the server?

PHP >= 5.5.9
OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension

It could be that you're missing the OpenSSL extension. Also, do you have the key set in .env file?

Try running:

php artisan key:generate

Answer: the 'cipher' => '' was not set.

Question 3

Laravel doesn't check for these by default because these headers can be trivially injected into a request (i.e. faked), and that creates a theoretical attack vector into your application. A malicious user can make Laravel think a request is, or is not secure, which in turn might lead to something being compromised.

When I ran into this same problem a few months back using Laravel 4.2, my solution was to create a custom request class and tell Laravel to use it her

#File: bootstrap/start.php
//for custom secure behavior -- laravel autoloader doesn't seem here yet?
require_once realpath(__DIR__) . 'path/to/my/MyCustomRequest.php';

IlluminateFoundationApplication::requestClass('MyCustomRequest');

and then in MyCustomReuqestClass, I extended the base request class and added extra is/is-not secure logic

class Request extends IlluminateHttpRequest
{
    /**
     * Determine if the request is over HTTPS, or was sent over HTTPS
     * via the load balancer
     *
     * @return bool
     */
    public function secure()
    {        
        $secure = parent::secure();
        //extra custom logic to determine if something is, or is not, secure
        //...
        return $secure;
    }    

    public function isSecure()
    {

        return $this->secure();
    }
}

I would not do this now. After working with the framework for a few months, I realized that Laravel's request class has the Symfony request class as a parent, meaning a Laravel request inherits a Symfony request object's behavior.

That means you can tell Laravel which proxy servers it should trust with something like this

Request::setTrustedProxies(array(
    '192.168.1.52' // IP address of your proxy server
));

This code tells Laravel which proxy servers it should trust. After that, it should pickup the standard "forwarded for" headers. You can read more about this functionality in the Symfony docs.

Question 4

You have to gain access over STDERR and, probably, STDOUT. Use proc_open, e.g.:

$desc = [
  1 => ['pipe', 'w'], // STDOUT
  2 => ['pipe', 'w'], // STDERR
];

$proc = proc_open('ls -l . something', $desc, $pipes);
if (is_resource($proc)) {

  if ($out = stream_get_contents($pipes[1])) {
    echo $out;
  }
  fclose($pipes[1]);


  if ($err = stream_get_contents($pipes[2])) {
    fprintf(STDERR, "Error: %sn", $err);
  }
  fclose($pipes[2]);

  // You can also check the process exit status
  // 0 means success, otherwise error.
  $exit_status = proc_close($proc);
}

Of course, there is no need in STDOUT pipe, if the command redirects it to a file.

And yes, system() won't throw exceptions. Obviously, you can implement your own class which will throw an exception in case if the process exit status is non-zero, or there is something caught in the STDERR pipe:

class MyShellException extends Exception {}

class MyShell {
  public static function execute($command, &$out = null) {
    if (func_num_args() > 1) {
      $desc[1] = ['pipe', 'w'];
    } else {
      $desc[1] = ['file', '/dev/null'];
    }

    $desc[2] = ['pipe', 'w'];

    $proc = proc_open($command, $desc, $pipes);
    if (is_resource($proc)) {
      if (isset($pipes[1])) {
        $out = stream_get_contents($pipes[1]);
        fclose($pipes[1]);
      }

      if ($err = stream_get_contents($pipes[2])) {
        fclose($pipes[2]);
        throw new MyShellException("Command $command failed: $err");
      }

      if ($exit_status = proc_close($proc)) {
        throw new MyShellException("Command $command exited with non-zero status");
      }
    }
  }
}


try {
  MyShell::execute('ls -l . something', $out);
  echo "Output: $outn";
} catch (MyShellException $e) {
  if (!empty($out)) {
    echo "Output: $outn";
  }
  fprintf(STDERR, "MyShell error: " . $e->getMessage());
  exit(1);
}

Question 5

According to the official Laravel 7.x documentation, you can solve this quite easily.

Update your /app/Providers/AppServiceProvider.php to contain:

use IlluminateSupportFacadesSchema;

/**
 * Bootstrap any application services.
 *
 * @return void
 */
public function boot()
{
    Schema::defaultStringLength(191);
}

Alternatively, you may enable the innodb_large_prefix option for your database. Refer to your database's documentation for instructions on how to properly enable this option.

Question 6

You can set String Length manually by putting this

$table->string('name', 191); // You can put any number in exchange of 191

else

Put This in APP -> Providers -> AppServiceProvider

use IlluminateSupportFacadesSchema;

public function boot() 
{
    Schema::defaultStringLength(191);
}

laravel No supported encrypter found. The cipher and / or key length are invalid

Answers

php,ssl,laravel-5