Trying to get property of non-object

[dan]

When connecting throw SSH2 using a private key at some systems a fatal error is returned. There is no line number.

Fatal error: Trying to get property of non-object at lib/Math/BigInteger.php line 0

Tried a lot of things but I'm not able to find why this is happening. Maybe some fresh look will add some light into this issue

Code: Select all

Error!
Trying to get property of non-object

array(13) {
  [0]=>
  array(4) {
    ["file"]=>
    string(90) "lib/Math/BigInteger.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(16) "CUSTOM_handleError"
    ["args"]=>
    array(5) {
      [0]=>
      int(8)
      [1]=>
      string(36) "Trying to get property of non-object"
      [2]=>
      string(90) "lib/Math/BigInteger.php"
      [3]=>
      int(0)
      [4]=>
      array(1) {
        ["x"]=>
        bool(false)
      }
    }
  }
  [1]=>
  array(5) {
    ["file"]=>
    string(84) "lib/Crypt/RSA.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(8) "multiply"
    ["class"]=>
    string(15) "Math_BigInteger"
    ["type"]=>
    string(2) "->"
  }
  [2]=>
  array(5) {
    ["file"]=>
    string(84) "lib/Crypt/RSA.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(6) "_blind"
    ["class"]=>
    string(9) "Crypt_RSA"
    ["type"]=>
    string(2) "->"
  }
  [3]=>
  array(5) {
    ["file"]=>
    string(84) "lib/Crypt/RSA.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(13) "_exponentiate"
    ["class"]=>
    string(9) "Crypt_RSA"
    ["type"]=>
    string(2) "->"
  }
  [4]=>
  array(5) {
    ["file"]=>
    string(84) "lib/Crypt/RSA.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(7) "_rsasp1"
    ["class"]=>
    string(9) "Crypt_RSA"
    ["type"]=>
    string(2) "->"
  }
  [5]=>
  array(5) {
    ["file"]=>
    string(84) "lib/Crypt/RSA.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(23) "_rsassa_pkcs1_v1_5_sign"
    ["class"]=>
    string(9) "Crypt_RSA"
    ["type"]=>
    string(2) "->"
  }
  [6]=>
  array(5) {
    ["file"]=>
    string(83) "lib/Net/SSH2.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(4) "sign"
    ["class"]=>
    string(9) "Crypt_RSA"
    ["type"]=>
    string(2) "->"
  }
  [7]=>
  array(5) {
    ["file"]=>
    string(83) "lib/Net/SSH2.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(17) "_privatekey_login"
    ["class"]=>
    string(8) "Net_SSH2"
    ["type"]=>
    string(2) "->"
  }
  [8]=>
  array(5) {
    ["file"]=>
    string(83) "lib/Net/SSH2.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(13) "_login_helper"
    ["class"]=>
    string(8) "Net_SSH2"
    ["type"]=>
    string(2) "->"
  }
  [9]=>
  array(5) {
    ["file"]=>
    string(77) "custom.php"
    ["line"]=>
    int(0)
    ["function"]=>
    string(5) "login"
    ["class"]=>
    string(8) "Net_SSH2"
    ["type"]=>
    string(2) "->"
  }


Thanks!

[TerraFrost]

My expectation is that the latest Git version will fix this for you, if you want to give that a go!

[dan]

Thanks for your reply!

I downloaded the latest github files, unfortunately this did not solve the error.

My used code:

Code: Select all

      $ssh_hostname = $hostname;
      $ssh_port = $port;
      $ssh_user = $user

      $ssh_password = new Crypt_RSA();
      $ssh_password->loadKey($ssh_login['password']);
            
      try {
         $ssh = new Net_SSH2($ssh_hostname, $ssh_port, 10);
         if (!$ssh->login($ssh_user , $ssh_password)) {
            exit('Login Failed');
         }
         
         $ssh_result = $ssh->exec('time');

         $ssh->getExitStatus();
         $ssh->setTimeout(5);
      }
      catch (ErrorException $e) {
         var_dump($e->getTrace());
      }

Remote SSH error:

error: RSA_public_decrypt failed:
error:0407006A:lib(4):func(112):reason(106)

[TerraFrost]

What if you do this?:

Code: Select all

      $ssh_password = new Crypt_RSA();
      $ssh_password->loadKey($ssh_login['password']);

    echo $ssh_password;

Does anything output out?

[dan]

Yes this outputs the decrypted private key.

[TerraFrost]

What if you do this?:

Code: Select all

      $ssh_password = new Crypt_RSA();
      $ssh_password->loadKey($ssh_login['password']);

echo base64_encode($ssh_password->encrypt('hello world!'));

[dan]

Oke, well there is a base64 hash returned.

However the first time the property error was also returned beside the hash.

The second attempt it returned 'Unable to login to the ssh service'.

On both attempts there was a hash key, however they were different from each other.

[TerraFrost]

The "hash key", in the same code I posted, is going to be different because, by default, the encrypt() method uses RSA OAEP padding, which is randomized to protect against chosen plaintext attacks.

Anyway, could you post your key?

Also, can you post a copy of your RSA.php file?

Thanks!

[dan]

I see!

I've send the key to your inbox, and attached the file in this post.

Thanks!