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CSP generator #1546

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CSP generator #1546

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e2adb08
CSP generator
ofirgalcon Aug 9, 2024
9da65bf
Update head.php
ofirgalcon Aug 10, 2024
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61 changes: 60 additions & 1 deletion app/views/partials/head.php
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Original file line number Diff line number Diff line change
@@ -1,3 +1,62 @@
<!-- #### CSP Patch Start #### -->

<?php
global $nonce;

$nonce = base64_encode(random_bytes(16));

$_SESSION['g_nonce'] = $nonce;

// Register a callback to process the output buffer
ob_start(function($output) use ($nonce) {
return generateCSPHeader($output, $nonce);
});

function generateCSPHeader($output, $nonce)
{

$nonce_value = trim($nonce);

// Original CSP components
$default_src = "default-src 'self' www.google.com static.cloudflareinsights.com fonts.gstatic.com maps.googleapis.com fonts.googleapis.com;";
$img_src = "img-src 'self' data: https://* www.w3.org statici.icloud.com cdsassets.apple.com km.support.apple.com;";
$connect_src = "connect-src 'self' maps.googleapis.com fonts.googleapis.com packagist.org;";
$frame_ancestors = "frame-ancestors 'self';";
$frame_src = "frame-src 'self' https://www.google.com;";
$style_src = "style-src 'self' www.google.com static.cloudflareinsights.com fonts.gstatic.com maps.googleapis.com fonts.googleapis.com 'unsafe-inline';";
$script_src_base = "script-src 'self' https://www.google.com/recaptcha/api.js static.cloudflareinsights.com fonts.gstatic.com fonts.googleapis.com https://www.gstatic.com/recaptcha/ https://ajax.cloudflare.com 'unsafe-eval' ";
$script_src_base = $script_src_base . " 'nonce-$nonce_value' ";
$object_src = "object-src 'none' ;";
$base_uri = "base-uri 'self';"; // Add base-uri directive

// Regular expression to find inline scripts
// preg_match_all('/<script>(.*?)<\/script>/is', $output, $matches);
preg_match_all('/<script\b[^>]*>(.*?)<\/script>/is', $output, $matches);

$hashes = [];
foreach ($matches[1] as $script) {
$hash = base64_encode(hash('sha256', $script, true));
$hashes[] = "'sha256-$hash'";
}

// Append hashes to script-src
if (!empty($hashes)) {
$script_src = $script_src_base . " " . implode(' ', $hashes) . ";";
} else {
$script_src = $script_src_base . ";";
}

// Combine all CSP directives
$csp_header = "$default_src $img_src $connect_src $frame_ancestors $frame_src $style_src $script_src $object_src $base_uri";

// Add the CSP header
header("Content-Security-Policy: $csp_header");

return $output;
}
?>

<!-- #### CSP Patch End #### -->
<!doctype html>
<html class="no-js" lang="en">

Expand Down Expand Up @@ -46,7 +105,7 @@

<script src="<?php echo conf('subdirectory'); ?>assets/js/jquery.js"></script>

<script>
<script nonce="<?php echo htmlspecialchars($nonce);?>">
// Include csrf in all requests
$.ajaxSetup({
headers: {
Expand Down