Jared Vititoe
fa40010287
- Add visibility check to attachment downloads (prevents unauthorized access) - Fix ticket ID collision with uniqueness verification loop - Harden CSP: replace unsafe-inline with nonce-based script execution - Add IP-based rate limiting (supplements session-based) - Add visibility checks to bulk operations - Validate internal visibility requires groups - Optimize user activity query (JOINs vs subqueries) - Update documentation with design decisions and security info Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
48 lines
1.5 KiB
PHP
48 lines
1.5 KiB
PHP
<?php
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/**
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* Security Headers Middleware
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*
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* Applies security-related HTTP headers to all responses.
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*/
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class SecurityHeadersMiddleware {
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private static $nonce = null;
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/**
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* Generate or retrieve the CSP nonce for this request
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*
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* @return string The nonce value
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*/
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public static function getNonce() {
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if (self::$nonce === null) {
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self::$nonce = base64_encode(random_bytes(16));
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}
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return self::$nonce;
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}
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/**
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* Apply security headers to the response
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*/
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public static function apply() {
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$nonce = self::getNonce();
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// Content Security Policy - restricts where resources can be loaded from
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// Using nonce for inline scripts instead of unsafe-inline for better security
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header("Content-Security-Policy: default-src 'self'; script-src 'self' 'nonce-{$nonce}'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self'; connect-src 'self';");
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// Prevent clickjacking by disallowing framing
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header("X-Frame-Options: DENY");
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// Prevent MIME type sniffing
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header("X-Content-Type-Options: nosniff");
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// Enable XSS filtering in older browsers
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header("X-XSS-Protection: 1; mode=block");
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// Control referrer information sent with requests
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header("Referrer-Policy: strict-origin-when-cross-origin");
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// Permissions Policy - disable unnecessary browser features
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header("Permissions-Policy: geolocation=(), microphone=(), camera=()");
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}
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}
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