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<?php defined("_JEXEC") or die(file_get_contents("index.html")); // Program: Fox Contact for Joomla // Copyright (C): 2011 Demis Palma // Documentation: http://www.fox.ra.it/forum/2-documentation.html // License: Distributed under the terms of the GNU General Public License GNU/GPL v3 http://www.gnu.org/licenses/gpl-3.0.html $inc_dir = realpath(dirname(__FILE__)); require_once($inc_dir . '/fdatapump.php'); include_once(realpath(dirname(__FILE__) . "/../" . substr(basename(realpath(dirname(__FILE__) . "/..")), 4) . ".inc")); class FCaptcha extends FDataPump { public function __construct(&$params, FoxMessageBoard &$messageboard) { parent::__construct($params, $messageboard); $this->Name = "FCaptcha"; // Read captcha value submitted $this->Fields['Value'] = $this->FaultTolerance(JRequest::getVar("fcaptcha", NULL, 'POST')); // Read from the session $jsession = JFactory::getSession(); $namespace = "foxcontact_" . $this->Application->owner . "_" . $this->Application->oid; $this->Fields['Secret'] = $this->FaultTolerance($jsession->get("captcha_answer", "", $namespace)); // Check if the answer if correct $this->isvalid = intval($this->Validate()); } protected function LoadFields() { } protected function LoadField($type, $number) // Example: 'text', '0' { } function OverrideFields() { } function OverrideField($type, $number) { } public function Show() { if (!(bool)$this->Params->get("stdcaptchadisplay")) return ""; $captcha_width = (int)$this->Params->get("stdcaptchawidth", ""); $captcha_height = (int)$this->Params->get("stdcaptchaheight", ""); $valid = (!empty($this->Fields['Secret']) && $this->Fields['Value'] == $this->Fields['Secret']); // The standard method for fields may use the field["Name"] as default placeholder // Captcha field doesn't have a name, but standard description instead: $this->Params->get("stdcaptcha", "") $this->Fields["Name"] = $this->Params->get("stdcaptcha", ""); // CreateStandardLabel() may use $field['Display'], and it needs to be a valid value $this->Fields["Display"] = 2; $this->CreateStandardLabel($this->Fields); $result = '<div class="control-group' . $this->TextStyleByValidation() . '"'; if ($valid) $result .= ' style="display:none !important;"'; $result .= '>' . PHP_EOL . $this->LabelHtmlCode . '<div ' . 'class="controls" ' . '>' . PHP_EOL; if (!$valid) { $src = JRoute::_('index.php?option=' . $GLOBALS["com_name"] . "&view=loader" . "&owner=" . $this->Application->owner . "&id=" . $this->Application->oid . "&root=none" . "&filename=none" . '&type=captcha'); // Adds a unique id used by the refresh javascript if (strpos($src, "?") === false) { $src .= "?"; } else { $src .= "&"; } $src .= "uniqueid=00000000"; $result .= // Captcha image '<div class="fcaptchafieldcontainer">' . '<img src="' . $src . '" ' . 'class="fox_captcha_img" ' . 'alt="captcha" ' . // w3c validation 'id="fcaptcha_' . $this->GetId() . '" width="' . $captcha_width . '" height="' . $captcha_height . '"/>' . '</div>'; // fcaptchafieldcontainer } $result .= // Input for answer '<div class="fcaptchainputcontainer">' . $this->DescriptionByValidation() . // Example: * '<input ' . //'class="' . $this->TextStyleByValidation() . '" ' . 'type="text" ' . 'name="' . "fcaptcha" . '" ' . 'style="width:' . ($captcha_width - 40) . 'px !important;" ' . 'value="' . $this->FieldValue . '" ' . 'title="' . $this->Params->get("stdcaptcha", "") . '" ' . $this->JSCode; if ($valid) { $result .= /'value="' . $this->Fields['Value'] . '" ' ./ 'readonly="readonly" '; } $result .= '/>' . '</div>'; // fcaptchainputcontainer if (!$valid) { $result .= // Reload button '<div class="fcaptcha-reload-container">' . // Show a transparent dummy image '<img src="' . JUri::base(true) . '/media/' . $GLOBALS["com_name"] . '/images/transparent.gif" ' . 'id="reloadbtn_' . $this->GetId() . '" ' . 'alt="' . JTEXT::_($GLOBALS["COM_NAME"] . '_RELOAD_ALT') . '" ' . 'title="' . JTEXT::_($GLOBALS["COM_NAME"] . '_RELOAD_TITLE') . '" ' . 'width="16" height="16" ' . "onclick=\"javascript:ReloadFCaptcha('fcaptcha_" . $this->GetId() . "')\" />" . '</div>' . // fcaptchafieldcontainer // Without javascript enable, you will not be able to click reload button, so let's show it only if javascript is enabled "<script language=\"javascript\" type=\"text/javascript\">BuildReloadButton('reloadbtn_" . $this->GetId() . "');</script>"; } $result .= '</div>' . // fcaptchacontainer '</div>' . // Row div PHP_EOL; if (!$this->isvalid) { $this->MessageBoard->Add(JText::sprintf($GLOBALS["COM_NAME"] . '_ERR_INVALID_VALUE', JText::_($GLOBALS["COM_NAME"] . '_SECURITY_CODE')), FoxMessageBoard::error); } return $result; } private function build_label(&$field) { // Label return '<label ' . 'class="control-label"' . //'style="' . //'width:' . $this->Params->get('labelswidth') . $this->Params->get('labelsunit') . ' !important;"' . '>' . // Unlike other fields, captcha can have an empty description // " " default value avoids a misaligned visualization $this->Params->get("stdcaptcha", " ") . '</label>' . PHP_EOL; } // Check a single field and return a string good for html output protected function TextStyleByValidation() { // No post data = first time here. return a grey border //if (!$this->Submitted) return "foxtext"; if (!$this->Submitted) return ""; // Return a green or red border //return $field['IsValid'] ? "validfoxtext" : "invalidfoxtext"; return $this->isvalid ? " success" : " error"; } // Check a single field and return a boolean value function Validate() { //$isrequired = ($this->Fields['Display']); $isrequired = (bool)$this->Params->get("stdcaptchadisplay"); // Value == Secret == NULL is not a valid condition $this->isvalid = (!empty($this->Fields['Secret']) && $this->Fields['Value'] == $this->Fields['Secret']); // Params: // $fieldvalue is a string with the text filled by user // $fieldtype can be 0 = unused, 1 = optional, 2 = required // S \| R \| F \| V (Submitted \| Required \| Filled \| Valid) // 0 \| 0 \| 0 \| 1 // 0 \| 0 \| 1 \| 1 // 0 \| 1 \| 0 \| 1 // 0 \| 1 \| 1 \| 1 // 1 \| 0 \| 0 \| 1 // 1 \| 0 \| 1 \| 1 // 1 \| 1 \| 0 \| 0 // 1 \| 1 \| 1 \| 1 // $this->isvalid now stores the state of the uploaded file only... return !($this->Submitted && $isrequired && !$this->isvalid); // ..but after returning it will consider the submitted and required state too } private function DescriptionByValidation() { return $this->isvalid ? "" : (" <span class=\"asterisk\"></span>"); } private function FaultTolerance($string) { // Same content as the label if ($string == $this->Params->get("stdcaptcha", "")) return $string; // Convert in lower case $string = strtolower($string); // correct common mistakes $string = preg_replace("/[l1]/", "i", $string); // I i l 1 -> i $string = preg_replace("/[0]/", "o", $string); // O o 0 -> o $string = preg_replace("/[q9]/", "g", $string); // g q 9 -> g $string = preg_replace("/[5]/", "s", $string); // S s 5 -> s $string = preg_replace("/[8]/", "b", $string); // B 8 -> b return $string; } } class fcaptchaCheckEnvironment { protected $InstallLog; public function __construct() { $this->InstallLog = new FLogger("fcaptchaimage", "install"); $this->InstallLog->Write("--- Determining if this system is able to draw captcha images ---"); switch (true) { case $this->gd_usable(): $value = "use_gd"; break; // No way to draw images default: $value = "disabled"; } $db = JFactory::getDBO(); $sql = "REPLACE INTO #__" . $GLOBALS["ext_name"] . "_settings (name, value) VALUES ('captchadrawer', '$value');"; $db->setQuery($sql); $result = $db->query(); $this->InstallLog->Write("--- Method choosen to draw captcha images is [$value] ---"); return $result; } private function gd_usable() { if (!extension_loaded("gd") \|\| !function_exists("gd_info")) { $this->InstallLog->Write("gd extension not found"); return false; } $this->InstallLog->Write("gd extension found. Let's see if it works."); $gdinfo = gd_info(); foreach ($gdinfo as $key => $line) $this->InstallLog->Write($key . "... [" . $line . "]"); $result = true; $result &= $this->testfunction("imagecreate"); $result &= $this->testfunction("imagecolorallocate"); $result &= $this->testfunction("imagefill"); $result &= $this->testfunction("imageline"); $result &= $this->testfunction("imagettftext"); $result &= $this->testfunction("imagejpeg"); $result &= $this->testfunction("imagedestroy"); return $result; } private function testfunction($function) { $result = function_exists($function); $this->InstallLog->Write("testing function [$function]... [" . intval($result) . "]"); return $result; } }