[SOLVED] Encypt/Decrypt via mcrypt problem...

[Cory94bailly]

<?
if (!extension_loaded('mcrypt')) {
    print "Mcrypt not loaded!";
    exit;
} 
// Encrypt Function
function mc_encrypt($encrypt, $mc_key) {
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
$encode = base64_encode($passcrypt);
return $encode;
}

// Decrypt Function
function mc_decrypt($decrypt, $mc_key) {
$decoded = base64_decode($decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($decoded), MCRYPT_MODE_ECB, $iv));
return $decrypted;
}

echo "<b>Encrypt:</b> ". mc_encrypt("test", "key");
echo "<br>";
echo "<br>";
echo "<b>Decrypt:</b> ".mc_decrypt("test", "key");
?>

 

Well there's my code to try it out and here's what is being displayed:

 

Encrypt: JmZvVd0H+KeqflJNoQWwS3oJ4LxPvL9yd5R4QG7J

 

Decrypt: ‚Î7'#d;0XÒk†zÈ#×âMeǪ‚šbÃóéMˆ

 

 

(Incase the forum changes it's format, here:)

 

[MadTechie]

and the problem is ?

 

EDIT:

Unless the you where expecting the same result the reason your not is because your trying to decrypt unencrypted data..

try

$data = mc_encrypt("test", "key");
echo "<b>Encrypt:</b> ". $data;
echo "<br>";
echo "<br>";
echo "<b>Decrypt:</b> ".mc_decrypt($data, "key");

[Cory94bailly]

NEVER MIND! I'm really stupid..

 

I'm trying something else, give me a second

[Cory94bailly]

Ok whatever I do, I can't get them to be the same..  :wtf:

 

I am not getting this:

Encrypt: JmZvVd0H+KeqflJNoQWwS3oJ4LxPvL9yd5R4QG7J

Decrypt: ƒ£`€<8Òö:0>/ˆ_‹YYVfk¤K‰ƒgc

 

 

And my code is this:

<?
if (!extension_loaded('mcrypt')) {
    print "Mcrypt not loaded!";
    exit;
} 
// Encrypt Function
function mc_encrypt($encrypt, $mc_key) {
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
$encode = base64_encode($passcrypt);
return $encode;
}

// Decrypt Function
function mc_decrypt($decrypt, $mc_key) {
$decoded = base64_decode($decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($decoded), MCRYPT_MODE_ECB, $iv));
return $decrypted;
}

echo "<b>Encrypt:</b> ". mc_encrypt("test", "key");
echo "<br>";
echo "<br>";
echo "<b>Decrypt:</b> ".mc_decrypt("JmZvVd0H+KeqflJNoQWwS3oJ4LxPvL9yd5R4QG7J", "key");
?>

 

Any help?

[Daniel0]

It seems to work for other keys. Maybe it has to do with this (from mcrypt_encrypt):

 

The key with which the data will be encrypted. If it's smaller that the required keysize, it is padded with '\0'. It is better not to use ASCII strings for keys.

[Daniel0]

Hmm... Check this out:

 

$key = 'key';
$message = 'test';

$encrypted = mc_encrypt($message, $key);
$decrypted = mc_decrypt($encrypted, $key);

if ($decrypted == $message) {
echo 'Works';
}
else {
echo 'Broken';
}

 

That will output "Broken", but if you do $key = 'abc'; it will output "Works". I cannot give an explanation to that.

[Cory94bailly]

Hmm... Check this out:

 

$key = 'key';
$message = 'test';

$encrypted = mc_encrypt($message, $key);
$decrypted = mc_decrypt($encrypted, $key);

if ($decrypted == $message) {
echo 'Works';
}
else {
echo 'Broken';
}

 

That will output "Broken", but if you do $key = 'abc'; it will output "Works". I cannot give an explanation to that.

 

Yep.. Same thing for me..

 

Is there a better encrypt/decrypt function available (Using any form of mcrypt..)

[Cory94bailly]

Actually.. It seems to work with a longer key..

[Daniel0]

Actually.. It seems to work with a longer key..

 

Yeah, as I said, it only seems to happen if the key is "key".

[Cory94bailly]

Actually.. It seems to work with a longer key..

 

Yeah, as I said, it only seems to happen if the key is "key".

 

Ok, thanks

 

I marked it solved..

 

 

Jeez.. phpfreaks is always helpful, I love this community