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security.php
97 lines
| 1 | <?php |
| 2 | |
| 3 | class Meow_MWAI_Modules_Security { |
| 4 | public $core = null; |
| 5 | public $banned_ips = []; |
| 6 | public $banned_words = []; |
| 7 | |
| 8 | public function __construct( $core ) { |
| 9 | $this->core = $core; |
| 10 | $this->banned_ips = $this->core->get_option( 'banned_ips' ); |
| 11 | $this->banned_words = $this->core->get_option( 'banned_words' ); |
| 12 | |
| 13 | if ( !empty( $this->banned_ips ) ) { |
| 14 | add_filter( 'mwai_ai_allowed', [ $this, 'check_banned_ips' ], 5, 3 ); |
| 15 | } |
| 16 | if ( !empty( $this->banned_words ) ) { |
| 17 | add_filter( 'mwai_ai_allowed', [ $this, 'check_banned_words' ], 5, 3 ); |
| 18 | } |
| 19 | } |
| 20 | |
| 21 | public function check_banned_ips( $ok, $query, $limits ) { |
| 22 | if ( $ok !== true || empty( $this->banned_ips ) ) { |
| 23 | return $ok; |
| 24 | } |
| 25 | if ( is_a( $query, 'Meow_MWAI_Query_Embed' ) ) { |
| 26 | if ( $this->core->can_access_settings() ) { |
| 27 | return $ok; |
| 28 | } |
| 29 | } |
| 30 | $ip = $this->core->get_ip_address( true ); |
| 31 | if ( $this->is_blocked_ip( $ip, $this->banned_ips ) ) { |
| 32 | Meow_MWAI_Logging::warn( "Blocked IP: $ip", '🔒' ); |
| 33 | throw new Exception( 'Your query has been rejected.' ); |
| 34 | } |
| 35 | return $ok; |
| 36 | } |
| 37 | |
| 38 | public function check_banned_words( $ok, $query, $limits ) { |
| 39 | if ( $ok !== true || empty( $this->banned_words ) ) { |
| 40 | return $ok; |
| 41 | } |
| 42 | if ( is_a( $query, 'Meow_MWAI_Query_Embed' ) ) { |
| 43 | if ( $this->core->can_access_settings() ) { |
| 44 | return $ok; |
| 45 | } |
| 46 | } |
| 47 | $text = $query->get_message(); |
| 48 | $is_substring_match = $this->core->get_option( 'ignore_word_boundaries' ); |
| 49 | foreach ( $this->banned_words as $word ) { |
| 50 | // Use preg_quote to escape any special characters in the word |
| 51 | // This is necessary to safely include $word in the regex pattern |
| 52 | // Add the 'u' modifier to enable Unicode support |
| 53 | if ( $is_substring_match ) { |
| 54 | $pattern = '/' . preg_quote( $word, '/' ) . '/iu'; // no \b |
| 55 | } |
| 56 | else { |
| 57 | $pattern = '/\b' . preg_quote( $word, '/' ) . '\b/iu'; |
| 58 | } |
| 59 | if ( preg_match( $pattern, $text ) ) { |
| 60 | Meow_MWAI_Logging::warn( "Blocked word: $word", '🔒' ); |
| 61 | throw new Exception( 'Your query has been rejected.' ); |
| 62 | } |
| 63 | } |
| 64 | return $ok; |
| 65 | } |
| 66 | |
| 67 | public function ip_in_range( $ip, $range ) { |
| 68 | if ( strpos( $range, '/' ) === false ) { |
| 69 | $range .= '/32'; // Convert single IP to CIDR notation |
| 70 | } |
| 71 | list( $range_ip, $subnet ) = explode( '/', $range, 2 ); |
| 72 | if ( filter_var( $range_ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ) { |
| 73 | $ip_bin = ip2long( $ip ); |
| 74 | $range_ip_bin = ip2long( $range_ip ); |
| 75 | $subnet_mask = 0xFFFFFFFF << ( 32 - $subnet ); |
| 76 | return ( $ip_bin & $subnet_mask ) == ( $range_ip_bin & $subnet_mask ); |
| 77 | } |
| 78 | elseif ( filter_var( $range_ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) { |
| 79 | $ip_bin = inet_pton( $ip ); |
| 80 | $range_ip_bin = inet_pton( $range_ip ); |
| 81 | $subnet_mask = str_repeat( "\xFF", $subnet >> 3 ) . str_repeat( "\x00", 16 - ( $subnet >> 3 ) ); |
| 82 | $subnet_mask[( $subnet >> 3 )] = chr( 0xFF << ( 8 - ( $subnet & 7 ) ) ); |
| 83 | return ( $ip_bin & $subnet_mask ) == ( $range_ip_bin & $subnet_mask ); |
| 84 | } |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | public function is_blocked_ip( $ip, $blocked_ips ) { |
| 89 | foreach ( $blocked_ips as $range ) { |
| 90 | if ( $this->ip_in_range( $ip, $range ) ) { |
| 91 | return true; |
| 92 | } |
| 93 | } |
| 94 | return false; |
| 95 | } |
| 96 | } |
| 97 |