1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2009 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class recaptcha_Core {
static function get_configure_form() {
$form = new Forge("admin/recaptcha", "", "post", array("id" => "gConfigureRecaptchaForm"));
$group = $form->group("configure_recaptcha")
->label(t("Configure reCAPTCHA"));
$group->input("public_key")
->label(t("Public Key"))
->value(module::get_var("recaptcha", "public_key"));
$group->public_key->error_messages("invalid", t("The public key you provided is invalid."));
$group->input("private_key")
->label(t("Private Key"))
->value(module::get_var("recaptcha", "private_key"));
$group->private_key->error_messages("invalid", t("The private key you provided is invalid."));
$group->submit("")->value(t("Save"));
$site_domain = urlencode(stripslashes($_SERVER["HTTP_HOST"]));
$form->get_key_url = "http://recaptcha.net/api/getkey?domain=$site_domain&app=Gallery3";
return $form;
}
static function check_config() {
$public_key = module::get_var("recaptcha", "public_key");
$private_key = module::get_var("recaptcha", "private_key");
if (empty($public_key) || empty($private_key)) {
site_status::warning(
t("reCAPTCHA is not quite ready! Please configure the <a href=\"%url\">reCAPTCHA Keys</a>",
array("url" => html::mark_clean(url::site("admin/recaptcha")))),
"recaptcha_config");
} else {
site_status::clear("recaptcha_config");
}
}
/**
* Verify that the recaptcha key is valid.
* @param string $private_key
* @return boolean
*/
static function verify_key($private_key) {
$remote_ip = Input::instance()->server("REMOTE_ADDR");
$response = self::_http_post("api-verify.recaptcha.net", "/verify",
array("privatekey" => $private_key,
"remoteip" => $remote_ip,
"challenge" => "right",
"response" => "wrong"));
$answers = explode("\n", $response[1]);
if (trim($answers[0]) == "true") {
return null;
} else {
return $answers[1];
}
}
/**
* Form validation call back for captcha validation
* @param string $form
* @return string error message or null
*/
static function is_recaptcha_valid($challenge, $response, $private_key) {
$input = Input::instance();
$remote_ip = $input->server("REMOTE_ADDR");
//discard spam submissions
if (empty($challenge) || empty($response)) {
return "incorrect-captcha-sol";
}
$response = self::_http_post("api-verify.recaptcha.net", "/verify",
array ("privatekey" => $private_key,
"remoteip" => $remote_ip,
"challenge" => $challenge,
"response" => $response));
$answers = explode ("\n", $response [1]);
if (trim ($answers [0]) == "true") {
return null;
} else {
return $answers[1];
}
}
/**
* Encodes the given data into a query string format
* @param $data - array of string elements to be encoded
* @return string - encoded request
*/
private static function _encode(array $data){
$req = array();
foreach ($data as $key => $value){
$req[] = "$key=" . urlencode(stripslashes($value));
}
return implode("&", $req);
}
/**
* Submits an HTTP POST to a reCAPTCHA server
* @param string $host
* @param string $path
* @param array $data
* @param int port
* @return array response
*/
private static function _http_post($host, $path, $data, $port = 80) {
$req = self::_encode($data);
$http_request = "POST $path HTTP/1.0\r\n";
$http_request .= "Host: $host\r\n";
$http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
$http_request .= "Content-Length: " . strlen($req) . "\r\n";
$http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
$http_request .= "\r\n";
$http_request .= $req;
$response = "";
if( false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) {
throw new Exception("@todo COULD NOT OPEN SOCKET");
}
fwrite($fs, $http_request);
while (!feof($fs)) {
$response .= fgets($fs, 1160); // One TCP-IP packet
}
fclose($fs);
$response = explode("\r\n\r\n", $response, 2);
return $response;
}
}
|
