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1 | <?php |
1 | <?php |
2 | 2 | ||
3 | /* |
3 | /* |
4 | * ViaThinkSoft Anti-Spam Script for PHP |
4 | * ViaThinkSoft Anti-Spam Script for PHP |
5 | * (C) 2009-2022 ViaThinkSoft |
5 | * (C) 2009-2022 ViaThinkSoft |
6 | * Revision: 2022-01-09 (Version 4.1) |
6 | * Revision: 2022-11-05 (Version 4.1.1) |
7 | * License: Apache 2.0 License |
7 | * License: Apache 2.0 License |
8 | */ |
8 | */ |
9 | 9 | ||
10 | class VtsAntiSpam4 { |
10 | class VtsAntiSpam4 { |
11 | 11 | ||
12 | public $garbageLength = 5; |
12 | public $garbageLength = 5; |
13 | 13 | ||
14 | public function __construct() { |
14 | public function __construct() { |
15 | self::randomize(); |
15 | self::randomize(); |
16 | } |
16 | } |
17 | 17 | ||
18 | private static function randomize() { |
18 | private static function randomize() { |
19 | // Anfagswert über aktuelle Mikrosekunde setzen |
19 | // Anfagswert über aktuelle Mikrosekunde setzen |
20 | // http://de2.php.net/manual/de/function.srand.php |
20 | // http://de2.php.net/manual/de/function.srand.php |
21 | list($usec, $sec) = explode(' ', microtime()); |
21 | list($usec, $sec) = explode(' ', microtime()); |
22 | $seed = (int)($sec + ((float)$usec * 100000)); |
22 | $seed = (int)((int)$sec + ((float)$usec * 100000)); |
23 | srand($seed); |
23 | srand($seed); |
24 | } |
24 | } |
25 | 25 | ||
26 | private function RandomString($len) { |
26 | private function RandomString($len) { |
27 | // http://www.jonasjohn.de/snippets/php/rand-str.htm |
27 | // http://www.jonasjohn.de/snippets/php/rand-str.htm |
28 | $randstr = ''; |
28 | $randstr = ''; |
29 | //srand((double)microtime()*1000000); |
29 | //srand((double)microtime()*1000000); |
30 | for($i=0;$i<$len;$i++) { |
30 | for($i=0;$i<$len;$i++) { |
31 | $n = rand(48,120); |
31 | $n = rand(48,120); |
32 | while (($n >= 58 && $n <= 64) || ($n >= 91 && $n <= 96)) { |
32 | while (($n >= 58 && $n <= 64) || ($n >= 91 && $n <= 96)) { |
33 | $n = rand(48,120); |
33 | $n = rand(48,120); |
34 | } |
34 | } |
35 | $randstr .= chr($n); |
35 | $randstr .= chr($n); |
36 | } |
36 | } |
37 | return $randstr; |
37 | return $randstr; |
38 | } |
38 | } |
39 | 39 | ||
40 | private function js_randombreaks() { |
40 | private function js_randombreaks() { |
41 | $len = rand(0, $this->garbageLength); |
41 | $len = rand(0, $this->garbageLength); |
42 | $r = ''; |
42 | $r = ''; |
43 | $one_line_comment = false; |
43 | $one_line_comment = false; |
44 | for($i=0;$i<$len;$i++) { |
44 | for($i=0;$i<$len;$i++) { |
45 | $m = rand(0, 3); |
45 | $m = rand(0, 3); |
46 | if ($m == 0) { |
46 | if ($m == 0) { |
47 | $r .= ' '; |
47 | $r .= ' '; |
48 | } else if ($m == 1) { |
48 | } else if ($m == 1) { |
49 | $r .= '//'; |
49 | $r .= '//'; |
50 | $r .= $this->RandomString($i); |
50 | $r .= $this->RandomString($i); |
51 | $one_line_comment = true; |
51 | $one_line_comment = true; |
52 | } else if ($m == 2) { |
52 | } else if ($m == 2) { |
53 | $r .= "\r\n"; |
53 | $r .= "\r\n"; |
54 | $one_line_comment = false; |
54 | $one_line_comment = false; |
55 | } else { |
55 | } else { |
56 | $r .= "\t"; |
56 | $r .= "\t"; |
57 | } |
57 | } |
58 | } |
58 | } |
59 | if ($one_line_comment) $r .= "\r\n"; |
59 | if ($one_line_comment) $r .= "\r\n"; |
60 | return $r; |
60 | return $r; |
61 | } |
61 | } |
62 | 62 | ||
63 | private function alas_js_crypt($text) { |
63 | private function alas_js_crypt($text) { |
64 | $tmp = ''; |
64 | $tmp = ''; |
65 | for ($i=0; $i<strlen($text); $i++) { |
65 | for ($i=0; $i<strlen($text); $i++) { |
66 | $tmp .= $this->js_randombreaks(); |
66 | $tmp .= $this->js_randombreaks(); |
67 | $tmp .= 'document.write("&#'.ord(substr($text, $i, 1)).';");'; |
67 | $tmp .= 'document.write("&#'.ord(substr($text, $i, 1)).';");'; |
68 | $tmp .= $this->js_randombreaks(); |
68 | $tmp .= $this->js_randombreaks(); |
69 | } |
69 | } |
70 | $tmp = $this->js_randombreaks().$tmp.$this->js_randombreaks(); |
70 | $tmp = $this->js_randombreaks().$tmp.$this->js_randombreaks(); |
71 | return $tmp; |
71 | return $tmp; |
72 | } |
72 | } |
73 | 73 | ||
74 | private function alas_noscript_crypt($text){ |
74 | private function alas_noscript_crypt($text){ |
75 | $tmp = ''; |
75 | $tmp = ''; |
76 | for ($i=0; $i<strlen($text); $i++) { |
76 | for ($i=0; $i<strlen($text); $i++) { |
77 | $tmp .= '<span style="display:inline;">&#'.ord(substr($text, $i, 1)).';</span>'; |
77 | $tmp .= '<span style="display:inline;">&#'.ord(substr($text, $i, 1)).';</span>'; |
78 | $tmp .= '<!--'.$this->js_randombreaks().'-->'; |
78 | $tmp .= '<!--'.$this->js_randombreaks().'-->'; |
79 | $tmp .= '<span style="display:none;">'.$this->RandomString(rand(0, $this->garbageLength)).'</span>'; |
79 | $tmp .= '<span style="display:none;">'.$this->RandomString(rand(0, $this->garbageLength)).'</span>'; |
80 | } |
80 | } |
81 | return $tmp; |
81 | return $tmp; |
82 | } |
82 | } |
83 | 83 | ||
84 | private function alas_js_write($text) { |
84 | private function alas_js_write($text) { |
85 | $text = str_replace('\\', '\\\\', $text); |
85 | $text = str_replace('\\', '\\\\', $text); |
86 | $text = str_replace('"', '\"', $text); |
86 | $text = str_replace('"', '\"', $text); |
87 | $text = str_replace('/', '\/', $text); // W3C Validation </a> -> <\/a> |
87 | $text = str_replace('/', '\/', $text); // W3C Validation </a> -> <\/a> |
88 | 88 | ||
89 | $ret = ''; |
89 | $ret = ''; |
90 | $ret .= $this->js_randombreaks(); |
90 | $ret .= $this->js_randombreaks(); |
91 | $ret .= 'document.write("'.$text.'");'; |
91 | $ret .= 'document.write("'.$text.'");'; |
92 | $ret .= $this->js_randombreaks(); |
92 | $ret .= $this->js_randombreaks(); |
93 | 93 | ||
94 | return $ret; |
94 | return $ret; |
95 | } |
95 | } |
96 | 96 | ||
97 | public function secure_email($email, $linktext, $crypt_linktext) |
97 | public function secure_email($email, $linktext, $crypt_linktext) |
98 | { |
98 | { |
99 | // No new lines to avoid a JavaScript error! |
99 | // No new lines to avoid a JavaScript error! |
100 | $linktext = str_replace("\r", ' ', $linktext); |
100 | $linktext = str_replace("\r", ' ', $linktext); |
101 | $linktext = str_replace("\n", ' ', $linktext); |
101 | $linktext = str_replace("\n", ' ', $linktext); |
102 | 102 | ||
103 | $aus = ''; |
103 | $aus = ''; |
104 | if ($email != '') { |
104 | if ($email != '') { |
105 | $zid = 'ALAS-4.0-'.DecHex(crc32($email)).'-'.DecHex(crc32($linktext)).'-'.($crypt_linktext ? 'S' : 'L'); |
105 | $zid = 'ALAS-4.0-'.DecHex(crc32($email)).'-'.DecHex(crc32($linktext)).'-'.($crypt_linktext ? 'S' : 'L'); |
106 | $title = 'ViaThinkSoft "ALAS" Anti-Spam'; |
106 | $title = 'ViaThinkSoft "ALAS" Anti-Spam'; |
107 | 107 | ||
108 | $aus .= "<!-- BEGIN $title [ID $zid] -->\r\n"; |
108 | $aus .= "<!-- BEGIN $title [ID $zid] -->\r\n"; |
109 | $aus .= '<script language="JavaScript" type="text/javascript"><!--'."\n"; |
109 | $aus .= '<script language="JavaScript" type="text/javascript"><!--'."\n"; |
110 | $aus .= $this->alas_js_write('<a href="'); |
110 | $aus .= $this->alas_js_write('<a href="'); |
111 | $aus .= $this->alas_js_crypt('mailto:'.$email); |
111 | $aus .= $this->alas_js_crypt('mailto:'.$email); |
112 | $aus .= $this->alas_js_write('">'); |
112 | $aus .= $this->alas_js_write('">'); |
113 | $aus .= $crypt_linktext ? $this->alas_js_crypt($linktext) : $this->alas_js_write($linktext); |
113 | $aus .= $crypt_linktext ? $this->alas_js_crypt($linktext) : $this->alas_js_write($linktext); |
114 | $aus .= $this->alas_js_write('</a>').'// --></script>'; |
114 | $aus .= $this->alas_js_write('</a>').'// --></script>'; |
115 | 115 | ||
116 | $aus .= '<noscript>'; |
116 | $aus .= '<noscript>'; |
117 | if ($linktext != $email) $aus .= ($crypt_linktext ? $this->alas_noscript_crypt($linktext) : $linktext).' '; |
117 | if ($linktext != $email) $aus .= ($crypt_linktext ? $this->alas_noscript_crypt($linktext) : $linktext).' '; |
118 | $aus .= $this->alas_noscript_crypt("[ $email ]"); |
118 | $aus .= $this->alas_noscript_crypt("[ $email ]"); |
119 | $aus .= '</noscript>'; |
119 | $aus .= '</noscript>'; |
120 | $aus .= "\r\n<!-- END $title [ID $zid] -->\r\n"; |
120 | $aus .= "\r\n<!-- END $title [ID $zid] -->\r\n"; |
121 | } |
121 | } |
122 | 122 | ||
123 | return $aus; |
123 | return $aus; |
124 | } |
124 | } |
125 | 125 | ||
126 | public function secure_email_autodetect($email, $linktext) { |
126 | public function secure_email_autodetect($email, $linktext) { |
127 | // Automatisch erkennen, ob der $linktext für Spambots interessant ist oder nicht |
127 | // Automatisch erkennen, ob der $linktext für Spambots interessant ist oder nicht |
128 | $pos = strpos($linktext, '@'); |
128 | $pos = strpos($linktext, '@'); |
129 | 129 | ||
130 | return $this->secure_email($email, $linktext, $pos !== false); |
130 | return $this->secure_email($email, $linktext, $pos !== false); |
131 | } |
131 | } |
132 | 132 | ||
133 | public function secure_email_identical_text($email) { |
133 | public function secure_email_identical_text($email) { |
134 | return $this->secure_email_autodetect($email, $email); |
134 | return $this->secure_email_autodetect($email, $email); |
135 | } |
135 | } |
136 | 136 | ||
137 | } |
137 | } |
138 | 138 | ||
139 | # ------------------------------------------------------------------------------ |
139 | # ------------------------------------------------------------------------------ |
140 | 140 | ||
141 | function secure_email($email, $linktext, $crypt_linktext, $css_class='') { |
141 | function secure_email($email, $linktext, $crypt_linktext, $css_class='') { |
142 | if (!empty($css_class)) { |
142 | if (!empty($css_class)) { |
143 | // TODO |
143 | // TODO |
144 | throw new Exception("CSSClass is not yet implemented in AntiSpam v4"); |
144 | throw new Exception("CSSClass is not yet implemented in AntiSpam v4"); |
145 | } |
145 | } |
146 | 146 | ||
147 | $antispam = new VtsAntiSpam4(); |
147 | $antispam = new VtsAntiSpam4(); |
148 | $res = $antispam->secure_email($email, $linktext, $crypt_linktext); |
148 | $res = $antispam->secure_email($email, $linktext, $crypt_linktext); |
149 | return $res; |
149 | return $res; |
150 | } |
150 | } |
151 | 151 | ||
152 | function secure_email_autodetect($email, $linktext) { |
152 | function secure_email_autodetect($email, $linktext) { |
153 | $antispam = new VtsAntiSpam4(); |
153 | $antispam = new VtsAntiSpam4(); |
154 | $res = $antispam->secure_email_autodetect($email, $linktext); |
154 | $res = $antispam->secure_email_autodetect($email, $linktext); |
155 | return $res; |
155 | return $res; |
156 | } |
156 | } |
157 | 157 | ||
158 | function secure_email_identical_text($email) { |
158 | function secure_email_identical_text($email) { |
159 | $antispam = new VtsAntiSpam4(); |
159 | $antispam = new VtsAntiSpam4(); |
160 | $res = $antispam->secure_email_identical_text($email); |
160 | $res = $antispam->secure_email_identical_text($email); |
161 | return $res; |
161 | return $res; |
162 | } |
162 | } |
163 | 163 |