SecurityMiddleware.php
224 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Security Middleware Trait for CommerceBird |
| 4 | * |
| 5 | * @package CommerceBird\Admin\Security |
| 6 | */ |
| 7 | |
| 8 | namespace CommerceBird\Admin\Security; |
| 9 | |
| 10 | if ( ! defined( 'ABSPATH' ) ) { |
| 11 | exit; |
| 12 | } |
| 13 | |
| 14 | trait SecurityMiddleware { |
| 15 | |
| 16 | /** |
| 17 | * Apply security headers to responses. |
| 18 | */ |
| 19 | private function apply_security_headers(): void { |
| 20 | $headers = SecurityConfig::get_security_headers(); |
| 21 | |
| 22 | foreach ( $headers as $header => $value ) { |
| 23 | if ( ! headers_sent() ) { |
| 24 | header( $header . ': ' . $value ); |
| 25 | } |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Validate input data against known patterns. |
| 31 | * |
| 32 | * @param array $data Input data to validate. |
| 33 | * @param array $field_types Field type mappings. |
| 34 | * @return bool True if valid, false otherwise. |
| 35 | */ |
| 36 | private function validate_input_patterns( array $data, array $field_types ): bool { |
| 37 | foreach ( $field_types as $field => $type ) { |
| 38 | if ( ! isset( $data[ $field ] ) ) { |
| 39 | continue; |
| 40 | } |
| 41 | |
| 42 | $pattern = SecurityConfig::get_validation_pattern( $type ); |
| 43 | if ( $pattern && ! preg_match( $pattern, $data[ $field ] ) ) { |
| 44 | return false; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | return true; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Check user capability for specific action. |
| 53 | * |
| 54 | * @param string $action Action being performed. |
| 55 | * @return bool True if user has capability, false otherwise. |
| 56 | */ |
| 57 | private function check_user_capability( string $action ): bool { |
| 58 | $required_cap = SecurityConfig::get_required_capability( $action ); |
| 59 | |
| 60 | if ( ! $required_cap ) { |
| 61 | return true; // No specific capability required. |
| 62 | } |
| 63 | |
| 64 | return current_user_can( $required_cap ); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Advanced rate limiting with multiple time windows. |
| 69 | * |
| 70 | * @param string $action Action being rate limited. |
| 71 | * @return bool True if within limits, false if exceeded. |
| 72 | */ |
| 73 | private function check_advanced_rate_limit( string $action ): bool { |
| 74 | $user_id = get_current_user_id(); |
| 75 | $ip = $_SERVER['REMOTE_ADDR']; |
| 76 | $base_key = "rate_limit_{$action}_{$user_id}_{$ip}"; |
| 77 | |
| 78 | // Check per-minute limit. |
| 79 | $minute_key = $base_key . '_minute'; |
| 80 | $minute_requests = get_transient( $minute_key ); |
| 81 | |
| 82 | if ( false === $minute_requests ) { |
| 83 | set_transient( $minute_key, 1, MINUTE_IN_SECONDS ); |
| 84 | } else { |
| 85 | if ( $minute_requests >= SecurityConfig::RATE_LIMIT_REQUESTS_PER_MINUTE ) { |
| 86 | return false; |
| 87 | } |
| 88 | set_transient( $minute_key, $minute_requests + 1, MINUTE_IN_SECONDS ); |
| 89 | } |
| 90 | |
| 91 | // Check per-hour limit. |
| 92 | $hour_key = $base_key . '_hour'; |
| 93 | $hour_requests = get_transient( $hour_key ); |
| 94 | |
| 95 | if ( false === $hour_requests ) { |
| 96 | set_transient( $hour_key, 1, HOUR_IN_SECONDS ); |
| 97 | } else { |
| 98 | if ( $hour_requests >= SecurityConfig::RATE_LIMIT_REQUESTS_PER_HOUR ) { |
| 99 | return false; |
| 100 | } |
| 101 | set_transient( $hour_key, $hour_requests + 1, HOUR_IN_SECONDS ); |
| 102 | } |
| 103 | |
| 104 | return true; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Log security event with context. |
| 109 | * |
| 110 | * @param string $event_type Type of security event. |
| 111 | * @param array $context Additional context data. |
| 112 | */ |
| 113 | private function log_security_event( string $event_type, array $context = array() ): void { |
| 114 | if ( ! SecurityConfig::LOG_SECURITY_EVENTS ) { |
| 115 | return; |
| 116 | } |
| 117 | |
| 118 | $event_data = array( |
| 119 | 'timestamp' => current_time( 'mysql' ), |
| 120 | 'event_type' => $event_type, |
| 121 | 'user_id' => get_current_user_id(), |
| 122 | 'ip_address' => $_SERVER['REMOTE_ADDR'], |
| 123 | 'user_agent' => $_SERVER['HTTP_USER_AGENT'] ?? 'unknown', |
| 124 | 'context' => $context, |
| 125 | ); |
| 126 | |
| 127 | $security_log = get_transient( 'commercebird_security_log' ); |
| 128 | if ( ! is_array( $security_log ) ) { |
| 129 | $security_log = array(); |
| 130 | } |
| 131 | |
| 132 | $security_log[] = $event_data; |
| 133 | |
| 134 | // Maintain log size limits. |
| 135 | if ( count( $security_log ) > SecurityConfig::LOG_MAX_ENTRIES ) { |
| 136 | $security_log = array_slice( $security_log, -SecurityConfig::LOG_MAX_ENTRIES ); |
| 137 | } |
| 138 | |
| 139 | set_transient( 'commercebird_security_log', $security_log, DAY_IN_SECONDS * SecurityConfig::LOG_RETENTION_DAYS ); |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Sanitize and validate subscription data. |
| 144 | * |
| 145 | * @param array $data Raw subscription data. |
| 146 | * @return array Sanitized and validated data. |
| 147 | */ |
| 148 | private function sanitize_subscription_response( array $data ): array { |
| 149 | $allowed_fields = array( |
| 150 | 'status', |
| 151 | 'plan', |
| 152 | 'currency', |
| 153 | 'total', |
| 154 | 'needs_payment', |
| 155 | 'next_payment_date_gmt', |
| 156 | 'variation_id', |
| 157 | ); |
| 158 | |
| 159 | $sanitized = array(); |
| 160 | |
| 161 | foreach ( $allowed_fields as $field ) { |
| 162 | if ( isset( $data[ $field ] ) ) { |
| 163 | if ( is_array( $data[ $field ] ) ) { |
| 164 | $sanitized[ $field ] = array_map( 'sanitize_text_field', $data[ $field ] ); |
| 165 | } else { |
| 166 | $sanitized[ $field ] = sanitize_text_field( $data[ $field ] ); |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | // Handle billing data separately with stricter controls. |
| 172 | if ( isset( $data['billing'] ) && is_array( $data['billing'] ) ) { |
| 173 | $sanitized['billing'] = array(); |
| 174 | |
| 175 | // Only include essential billing fields. |
| 176 | if ( isset( $data['billing']['email'] ) ) { |
| 177 | $email = sanitize_email( $data['billing']['email'] ); |
| 178 | if ( is_email( $email ) ) { |
| 179 | $sanitized['billing']['email'] = $email; |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | return $sanitized; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Check if request is from a suspicious source. |
| 189 | * |
| 190 | * @return bool True if suspicious, false otherwise. |
| 191 | */ |
| 192 | private function is_suspicious_request(): bool { |
| 193 | // Check for missing or suspicious user agent. |
| 194 | $user_agent = $_SERVER['HTTP_USER_AGENT'] ?? ''; |
| 195 | if ( empty( $user_agent ) || strlen( $user_agent ) < 10 ) { |
| 196 | return true; |
| 197 | } |
| 198 | |
| 199 | // Check for suspicious patterns in user agent. |
| 200 | $suspicious_patterns = array( |
| 201 | '/bot/i', |
| 202 | '/crawler/i', |
| 203 | '/spider/i', |
| 204 | '/scraper/i', |
| 205 | ); |
| 206 | |
| 207 | foreach ( $suspicious_patterns as $pattern ) { |
| 208 | if ( preg_match( $pattern, $user_agent ) ) { |
| 209 | return true; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | // Check referer header. |
| 214 | $referer = $_SERVER['HTTP_REFERER'] ?? ''; |
| 215 | $site_url = site_url(); |
| 216 | |
| 217 | if ( ! empty( $referer ) && strpos( $referer, $site_url ) !== 0 ) { |
| 218 | return true; |
| 219 | } |
| 220 | |
| 221 | return false; |
| 222 | } |
| 223 | } |
| 224 |