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Bug #29755 Functions mcrypt don't work OK?
Submitted: 2004-08-19 13:40 UTC Modified: 2004-08-19 13:44 UTC
From: asoft at asoft dot no-ip dot org Assigned:
Status: Not a bug Package: mcrypt related
PHP Version: 5.0.1 OS: Windows XP
Private report: No CVE-ID: None
 [2004-08-19 13:40 UTC] asoft at asoft dot no-ip dot org
Description:
------------
$a="hola";
$b=cry($a,'sdglmsdd');
$c=dcry($b,'sdglmsdd')

result: $c!=$a

Correct result: $c==$a

Code until now working in version 4 of php

The function cry work how before. Seem work OK.
The function dcry FAIL. Don't work how before.

Reproduce code:
---------------
	function cry($input,$key)
		{$input = str_replace("\n","",$input);
	    	$input = str_replace("\t","",$input);
	    	$input = str_replace("\r","",$input);
	    	$key = substr(md5($key),0,24);
	    	$td = mcrypt_module_open ('tripledes', '', 'ecb', '');
	    	$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);
	    	mcrypt_generic_init ($td, $key, $iv);
	    	$encrypted_data = mcrypt_generic ($td, $input);
	    	mcrypt_module_close ($td);
	    	return trim(chop(base64_encode($encrypted_data)));}
	function dcry($input,$key)
		{$input = str_replace("\n","",$input);
		$input = str_replace("\t","",$input);
		$input = str_replace("\r","",$input);
		$input = trim(chop(base64_decode($input)));
		$td = mcrypt_module_open ('tripledes', '', 'ecb', '');
		$key = substr(md5($key),0,24);
		$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);
		mcrypt_generic_init ($td, $key, $iv);
		$decrypted_data = mdecrypt_generic ($td, $input);
		mcrypt_module_close ($td);		
		return trim(chop($decrypted_data));}


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 [2004-08-19 13:44 UTC] derick@php.net
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.

Your code is wrong, you\'re recreating the IV for decryption.
 
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