Hello all -- I'm an ASP guy trying to help out some folks with a PHP site, so forgive me if I say anything dumb that anyone who's passed PHP 101 should know.
We've got an application that takes in credit card numbers, encrypts them with mcrypt, and saves them to a mySQL database. Then in another page the numbers (and other appropriate user data) is retrieved and decrypted so that the numbers are visible again. Around 90% of those numbers come back decryped perfectly, but that other 10% does not -- I'm getting credit card numbers that look like: n_5a…iö¦6 8L2Œx -- sometimes the entire number looks like that, sometimes it's just the last 5-6 digits.
Here's what I'm working with:
function hide ($cardNumber) {
$key = 'key -- same key used in both encrypt & decrypt functions';
$td = mcrypt_module_open ('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);
mcrypt_generic_init ($td, $key, $iv);
$encryptedData = mcrypt_generic ($td, $cardNumber);
mcrypt_generic_deinit ($td);
mcrypt_module_close ($td);
return $encryptedData;
} // end function hide
function show ($cardData) {
$key = 'again, same key as above';
$td = mcrypt_module_open ('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);
mcrypt_generic_init ($td, $key, $iv);
$decryptedData = mdecrypt_generic ($td, $cardData);
mcrypt_generic_deinit ($td);
mcrypt_module_close ($td);
return $decryptedData;
} // end function show
Anyone have any thoughts?
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I'm not really sure what that means -- I see the syntax for using base64_decode but the function as is works perfectly about 90% of the time. I don't understand why/how adding in base64_decode will help here. Again, please forgive my lack of PHP knowledge if there is something really basic here that I'm missing...
And here's the insert statement:
function insertPurchaserInfo() {
require ('config.inc.php');
$postField = array ('billFirst', 'billLast', 'billAddress', 'billCity', 'billState', 'billZip', 'billPhone', 'billEmail', 'cardType', 'expireMonth', 'expireYear');
$mysqlField = array ('first', 'last', 'address', 'city', 'state', 'zip', 'phone', 'email', 'cardType', 'expireMonth', 'expireYear', 'registerTimestamp', 'total', 'cardNumber');
$query = sprintf ('INSERT INTO purchasers (' . implode (', ', $mysqlField) . ') VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)', quoteSmart ($_POST['billFirst']), quoteSmart ($_POST['billLast']), quoteSmart ($_POST['billAddress']), quoteSmart ($_POST['billCity']), quoteSmart ($_POST['billState']), quoteSmart ($_POST['billZip']), quoteSmart ($_POST['billPhone']), quoteSmart ($_POST['billEmail']), quoteSmart ($_POST['cardType']), quoteSmart ($_POST['expireMonth']), quoteSmart ($_POST['expireYear']), time(), quoteSmart (totalCost()), quoteSmart (hide ($_POST['cardNumber'])));
$result = mysql_query ($query);
$insertId = ($result) ? mysql_insert_id() : NULL;
return $insertId;
} // end function insertPurchaserInfo
quoteSmart is the get_magic_quotes_gpc...
function quoteSmart ($value) {
if (get_magic_quotes_gpc()) {
$value = stripslashes ($value);
}
if (!is_numeric ($value)) {
$value = '"' . mysql_real_escape_string ($value) . '"';
}
return $value;
} // end function quoteSmart
Business Accounts
Answer for Membership
by: i_m_aamirPosted on 2007-01-08 at 07:57:06ID: 18267622
Please have a look about,
base64_decode()
base64_encode()
BOL!