function decryptData($crypttext, $key, $txt = '')
{
$crypttext = base64_decode($crypttext);
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
$test1 = '';
$test2 = 'x';
$clen = strlen($crypttext);
if ($clen > $iv_size) {
$iv = substr($crypttext, $clen - $iv_size, $iv_size);
$crypttext = substr($crypttext, 0, $clen - $iv_size);
$key = myhash($key . "123456789012345678901234567890");
// . myhash($key);
$decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, substr(pack("H*", $key), 0, 32), $crypttext, MCRYPT_MODE_CBC, $iv);
$pos = strrpos($decrypttext, "#");
$iscompressed = false;
if (substr($decrypttext, $pos - 1, 1) == '@') {
$iscompressed = true;
}
$ll = strlen(myshorthash("x"));
$test2 = substr($decrypttext, $pos - 1 - $ll, $ll);
$decrypttext = substr($decrypttext, 0, $pos - 1 - $ll);
$test1 = myshorthash($decrypttext);
}
if ($test1 != $test2) {
if ($txt == '') {
MSGError("Decryption error -- contact an admin now (" . getFunctionName() . ")");
}
// LogError("Decryption error -- contact an admin, possibly password wrong (" . getFunctionName() .",$txt)");
return "";
}
if ($iscompressed) {
return unzipstr($decrypttext);
}
return $decrypttext;
}
function DBGetRow($sql, $i, $c = null, $txt = '')
{
if ($txt == '') {
$txt = 'unknown at ' . getFunctionName();
}
if ($c == null) {
$c = DBConnect();
}
$r = DBExec($c, $sql, $txt);
if (DBnlines($r) < $i + 1) {
return null;
}
$a = DBRow($r, $i);
if (!$a) {
LOGError("Unable to get row {$i} from a query ({$txt}). SQL=(" . $sql . ")");
MSGError("Unable to get row from query ({$txt}).");
exit;
}
return $a;
}
function zipstr($str)
{
if (!function_exists('gzcompress')) {
MSGError("Compression error -- zlib not installed (" . getFunctionName() . ")");
LogError("Compression error -- zlib not installed (" . getFunctionName() . ")");
}
return gzcompress($str . '#' . myshorthash($str));
}
