private function decrypt_old($value)
{
if (strlen($value) <= 2) {
return '';
}
if (ord($value[0]) == 1 && ord($value[1]) == 1) {
// registry
$value = substr($value, 2);
if (strlen($value) <= 4) {
return '';
}
$l = data_int32(substr($value, 0, 4));
$value = substr($value, 4);
if (strlen($value) != $l) {
return '';
}
$value = chr(0x75) . chr(0x18) . chr(0x15) . chr(0x14) . $value;
$decrypted_pass = '';
for ($i = 1; $i <= int_divide($l, 4); $i++) {
$int_value = data_int32(substr($value, $i * 4, 4)) ^ data_int32(substr($value, ($i - 1) * 4, 4));
$value[$i * 4 + 0] = chr($int_value & 0xff);
$value[$i * 4 + 1] = chr($int_value >> 8 & 0xff);
$value[$i * 4 + 2] = chr($int_value >> 16 & 0xff);
$value[$i * 4 + 3] = chr($int_value >> 24 & 0xff);
}
for ($i = int_divide($l, 4) * 4 + 1; $i <= int_divide($l, 4) * 4 + $l % 4; $i++) {
$value[$i + 3] = chr(ord($value[$i + 3]) ^ ord($value[$i + 3 - $l % 4]));
}
return ztrim(substr($value, 4));
} else {
if (ord($value[0]) == 1 && ord($value[1]) == 2) {
// pstorage
$value = ztrim(unicode_to_ansi(substr($value, 2)));
return assign($this->pstorage[$value]);
}
}
return '';
}
function decrypt_cfbblock($module, $data, &$iv)
{
$outdata = "";
$p1 = substr($data, 0, 8);
$p2 = '';
for ($i = 0; $i < int_divide(strlen($data), 8); $i++) {
$temp = $p1;
$iv = mcrypt_generic($module, $iv);
$p2 = $p1;
$p2 = xor_block($p2, $iv);
$iv = $temp;
$outdata .= $p2;
$p1 = substr($data, ($i + 1) * 8, 8);
}
if (strlen($data) % 8 != 0) {
$iv = mcrypt_generic($module, $iv);
$outdata .= xor_block(substr($data, -(strlen($data) % 8)), $iv);
}
$outdata = substr($outdata, 0, strlen($data));
return $outdata;
}
function vertlinex($tlx, $tly, $brx, $bry, $image, $approxw, $tolerance = 2, $attempts = 10, $searchlongest = true)
{
//0 is black, 1 is white
$x = 0;
//try $attempts times to find start of line
$yadd = int_divide($bry - $tly, $attempts);
$s = array();
$count = 0;
$avg = 0;
for ($y = $tly; $y < $bry; $y += $yadd) {
$col = imagecolorat($image, $x, $y);
$width = 0;
$start = $x;
for ($x = $tlx; $x < $brx; $x++) {
$rgb = imagecolorat($image, $x, $y);
if ($rgb != $col) {
if ($width >= $approxw - $tolerance && $width <= $approxw + $tolerance && $col == 0) {
$s[$start + int_divide($width, 2)] = $y;
$count++;
$avg += $start;
}
$width = 0;
$col = $rgb;
$start = $x;
}
$width++;
//print $rgb;
}
//print "<br/>\n";
}
if (empty($s)) {
return 0;
}
//add ability to search for the line closest to a certain length - not just the longest which
//may be a page artifact. need to define CORNER_LINE_LENGTH in pixels and enablels
$line = 0;
if ($searchlongest == false) {
$line = 100000;
}
$longest = key($s);
foreach ($s as $x => $yval) {
$col = imagecolorat($image, $x, $tly);
$width = 0;
for ($y = $tly; $y < $bry; $y += 1) {
$rgb = imagecolorat($image, $x, $y);
if ($rgb != $col) {
//print "X LINE: $x width: $width COL: $col<br/>";
if ($searchlongest) {
if ($width > $line && $col == 0) {
$longest = $x;
$line = $width;
}
} else {
if (abs($width - $approxw) < $line && $col == 0) {
$longest = $x;
$line = abs($width - $approxw);
}
}
$width = 0;
$col = $rgb;
}
$width++;
}
}
return $longest;
}
