Description:
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Warning: mcrypt_generic_init(): Iv size incorrect; supplied length: 0, needed: 16 in D:\xampp\htdocs\AES_Encryption.php on line 141


but as specified in PHP User manual it says IV is ignored for ECB.
http://php.net/manual/en/function.mcrypt-generic-init.php

on Passing 16 Byte string it gives Fatal Exception.


Fatal error: Uncaught exception 'Exception' with message 'The specified encryption mode does not use an initialization vector. You should pass an empty string, zero, FALSE, or NULL.' in D:\xampp\htdocs\AES_Encryption.php:107 Stack trace: #0 D:\xampp\htdocs\test1.php(11): AES_Encryption->__construct('123456789012345...', '123456789012345...', 'PKCS7', 'ecb') #1 {main} thrown in D:\xampp\htdocs\AES_Encryption.php on line 107


I have tried with String zero FALSE and NULL. None works.


Test script:
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<?php
 
include('padCrypt.php');
include('AES_Encryption.php');
 
$key 	          = "12345678901234561234567890123456";
$iv               = "1234567890123456";
$message          = "The quick brown fox jumped over the lazy dog";
 
//$AES              = new AES_Encryption($key, $iv);
$AES              = new AES_Encryption($key, '', 'PKCS7', "ecb" );
$encrypted        = $AES->encrypt($message);
$decrypted        = $AES->decrypt($encrypted);
$base64_encrypted = base64_encode($encrypted);

echo $message;
echo "<BR>";
echo $encrypted;
echo "<BR>";
echo $decrypted;
echo "<BR>";


Expected result:
----------------
The warning should not be shown.

Actual result:
--------------
Encryption is done but it should not raise a warning.