Pfthb

I am developing an app in Laravel Framework 5.7.13.

I have a class called

<?php
namespace AppLibrary;

class Crypto

private $cipher;
private $cstrong;
private $keylen;
private $key;


public function __Crypto()
 $this->cipher= Config::get('cipher');
 $this->cstrong = true;
 $this->keylen = 5;
 $this->key = bin2hex(openssl_random_pseudo_bytes($keylen, $cstrong));


public function opensslEncrypt($value)


 $ivlen = openssl_cipher_iv_length($this->cipher);
 $iv = openssl_random_pseudo_bytes($ivlen);
 $ciphertext_raw = openssl_encrypt($value, $this->cipher, $this->key, $options=OPENSSL_RAW_DATA, $iv);
 $hmac = hash_hmac('sha256', $ciphertext_raw, $this->key, $as_binary=true);
 $ciphertext = base64_encode( $iv.$hmac.$ciphertext_raw );

 return $ciphertext ;

Now in my controller I did:

$crypto = new Crypto();
$encryptedValue = $crypto->opensslEncrypt($orderId);

In my Configapp.php

'cipher' => 'AES-256-CBC'

But when I run my app, I get

ErrorException (E_WARNING)
openssl_cipher_iv_length(): Unknown cipher algorithm

How to resolve this?

I tried to comment the cipher line in the Configapp.php, but then it gave some other errors.

Please help...

I ran into a similar problem with Laravel 5.7.13.

My error with Laravel and the openssl_cipher_iv_length() function was encountered when I updated my WampServer installation to PHP v7.2.x (from v7.1.10). Yes, I am running on Windows.

Switching back to php v7.1.10 would clear the error.

To solve my error with openssl_cipher_iv_length(), I compared the php.ini files from the two php versions. When comparing the files I noticed that I did not have the extension_dir set properly. This was my main issue, but there were other edits I made in the past that I also incorporated into the new PHP environment (i.e. extensions that were enabled and XDEBUG settings).

Also... I did notice that the extension names were previously defined as:
extension=php_<ext>.dll

or

extension=<ext>.so

and are now using:

extension=<ext>

So my issue with openssl_cipher_iv_length() was a result of the PHP version and not Laravel.

I hope this information helps.