Posted by laredotornado on 12/12/06 18:05

Hi, I'm using PHP 4.4.4. I have two functions, and my goal is to print
out "encryption/decrpytion successful".

$str = "hello";
$encryptedStr = encryptData($str);
$decryptedStr = decryptStr($encryptedStr);
if ($str == $decryptedStr) {
print "encryption/decryption successful.";
}

Unfortunately, this is not happening. These are my functions ...

function encryptData($p_str)
{
$iv = ENCRYPTION_VECTOR;
$enc = mcrypt_encrypt(MCRYPT_XTEA,
ENCRYPTION_KEY, $p_str, MCRYPT_MODE_ECB, $iv);
return $enc;
} // encryptstring

function decryptData($p_str)
{
$iv = ENCRYPTION_VECTOR;
$crypttext = mcrypt_decrypt(MCRYPT_XTEA,
ENCRYPTION_KEY, $p_str, MCRYPT_MODE_ECB, $iv);
return $crypttext;
} // decryptData

ENCRYPTION_VECTOR is a hard coded string I created with this call

$iv_size = mcrypt_get_iv_size(MCRYPT_XTEA,
MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);

I cut and pasted the value of "$iv" into my ENCRYPTION_VECTOR constant.
Any idea why my functions are failing?

Thanks, - Dave

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