generate($htmlContent);
*/
class TrafficPadding {
private int $minSize;
private int $maxSize;
private array $methods;
/**
* @param int $minSize Minimum padding size in bytes (default: 50KB)
* @param int $maxSize Maximum padding size in bytes (default: 5MB)
*/
public function __construct(int $minSize = 51200, int $maxSize = 5242880) {
$this->minSize = $minSize;
$this->maxSize = $maxSize;
// Available padding methods
$this->methods = [
'htmlComment',
'base64Image',
'jsonData',
'cssComment',
'jsComment',
'svgHidden',
'htmlDataAttribute',
'noscriptContent'
];
}
/**
* Generate padded content using random method
*/
public function generate(string $content): string {
$paddingSize = random_int($this->minSize, $this->maxSize);
$method = $this->methods[array_rand($this->methods)];
return $content . $this->$method($paddingSize);
}
/**
* Generate padded content using multiple random methods
*/
public function generateMultiple(string $content, int $methodCount = null): string {
if ($methodCount === null) {
$methodCount = random_int(2, 4);
}
$totalSize = random_int($this->minSize, $this->maxSize);
$sizePerMethod = intdiv($totalSize, $methodCount);
$shuffledMethods = $this->methods;
shuffle($shuffledMethods);
$padding = '';
for ($i = 0; $i < $methodCount; $i++) {
$method = $shuffledMethods[$i % count($shuffledMethods)];
$padding .= $this->$method($sizePerMethod);
}
return $content . $padding;
}
/**
* HTML comment with random data
*/
private function htmlComment(int $size): string {
$data = $this->generateRandomData($size);
return "\n\n";
}
/**
* Hidden Base64 encoded image (1x1 transparent)
*/
private function base64Image(int $size): string {
$data = $this->generateRandomData($size);
return ' . ')
';
}
/**
* Hidden JSON-LD structured data
*/
private function jsonData(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* CSS comment block
*/
private function cssComment(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* JavaScript comment block
*/
private function jsComment(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* Hidden SVG with random data
*/
private function svgHidden(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* Hidden data attribute on div
*/
private function htmlDataAttribute(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* Noscript tag with hidden content
*/
private function noscriptContent(int $size): string {
$data = $this->generateRandomData($size);
return '';
}
/**
* Generate cryptographically secure random bytes
*/
private function generateRandomData(int $size): string {
// Reduce size slightly to account for base64 encoding overhead
$rawSize = intdiv($size * 3, 4);
return random_bytes($rawSize);
}
/**
* Set custom size range
*/
public function setRange(int $minSize, int $maxSize): void {
$this->minSize = $minSize;
$this->maxSize = $maxSize;
}
/**
* Get current configuration
*/
public function getConfig(): array {
return [
'minSize' => $this->minSize,
'maxSize' => $this->maxSize,
'minSizeKB' => round($this->minSize / 1024, 2),
'maxSizeKB' => round($this->maxSize / 1024, 2),
'availableMethods' => count($this->methods)
];
}
}
?>