<?php
// Pandora FMS- http://pandorafms.com
// ==================================================
// Copyright (c) 2005-2011 Artica Soluciones Tecnologicas
// Please see http://pandorafms.org for full contribution list
// This program is free software; you can redistribute it and/or
// modify it under the terms of the  GNU Lesser General Public License
// as published by the Free Software Foundation; version 2
// 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.
require_once 'config.php';
require_once 'functions_api.php';

global $config;

define('DEBUG', 0);
define('VERBOSE', 0);

// TESTING THE UPDATE MANAGER
enterprise_include_once('include/functions_enterprise_api.php');

$ipOrigin = $_SERVER['REMOTE_ADDR'];

// Get the parameters and parse if necesary.
$op = get_parameter('op');
$op2 = get_parameter('op2');
$ext_name = get_parameter('ext_name');
$ext_function = get_parameter('ext_function');
$id = get_parameter('id');
$id2 = get_parameter('id2');
$otherSerialize = get_parameter('other');
$otherMode = get_parameter('other_mode', 'url_encode');
$returnType = get_parameter('return_type', 'string');
$api_password = get_parameter('apipass', '');
$password = get_parameter('pass', '');
$user = get_parameter('user', '');
$info = get_parameter('info', '');

$other = parseOtherParameter($otherSerialize, $otherMode);

$other = parseOtherParameter($otherSerialize, $otherMode);
$apiPassword = io_output_password(db_get_value_filter('value', 'tconfig', ['token' => 'api_password']));

$correctLogin = false;
$no_login_msg = '';

// Clean unwanted output
ob_clean();

// READ THIS:
// Special call without checks to retrieve version and build of the Pandora FMS
// This info is avalable from the web console without login
// Don't change the format, it is parsed by applications
switch ($info) {
    case 'version':
        if (!$config['MR']) {
            $config['MR'] = 0;
        }

        echo 'Pandora FMS '.$pandora_version.' - '.$build_version.' MR'.$config['MR'];

    exit;
}

if (isInACL($ipOrigin)) {
    if (empty($apiPassword) || (!empty($apiPassword) && $api_password === $apiPassword)) {
        $user_in_db = process_user_login($user, $password, true);
        if ($user_in_db !== false) {
            $config['id_user'] = $user_in_db;
            $correctLogin = true;

            if (session_status() === PHP_SESSION_NONE) {
                session_start();
            }

            $_SESSION['id_usuario'] = $user;
            session_write_close();
        } else {
            $no_login_msg = 'Incorrect user credentials';
        }
    } else {
        $no_login_msg = 'Incorrect given API password';
    }
} else {
    $no_login_msg = "IP $ipOrigin is not in ACL list";
}

if ($correctLogin) {
    if (($op !== 'get') && ($op !== 'set') && ($op !== 'help')) {
        returnError('no_set_no_get_no_help', $returnType);
    } else {
        $function_name = '';

        // Check if is an extension function and get the function name
        if ($op2 == 'extension') {
            $extension_api_url = $config['homedir'].'/'.EXTENSIONS_DIR."/$ext_name/$ext_name.api.php";
            // The extension API file must exist and the extension must be enabled
            if (file_exists($extension_api_url) && !in_array($ext_name, extensions_get_disabled_extensions())) {
                include_once $extension_api_url;
                $function_name = 'apiextension_'.$op.'_'.$ext_function;
            }
        } else {
            $function_name = 'api_'.$op.'_'.$op2;

            if ($op == 'set' && $id) {
                switch ($op2) {
                    case 'update_agent':

                    case 'add_module_in_conf':
                    case 'update_module_in_conf':
                    case 'delete_module_in_conf':

                        $id_os = db_get_value_sql('select id_os from tagente where id_agente = '.$id);

                        if ($id_os == 100) {
                            returnError('not_allowed_operation_cluster', $returnType);
                            return false;
                        }
                    break;

                    case 'create_network_module':
                    case 'create_plugin_module':
                    case 'create_data_module':
                    case 'create_synthetic_module':
                    case 'create_snmp_module':
                    case 'delete_module':
                    case 'delete_agent':

                        $id_os = db_get_value_sql('select id_os from tagente where nombre = "'.$id.'"');

                        if ($id_os == 100) {
                            returnError('not_allowed_operation_cluster', $returnType);
                            return false;
                        }
                    break;

                    case 'update_network_module':
                    case 'update_plugin_module':
                    case 'update_data_module':
                    case 'update_snmp_module':

                        $id_os = db_get_value_sql('select id_os from tagente where id_agente = (select id_agente from tagente_modulo where id_agente_modulo ='.$id.')');

                        if ($id_os == 100) {
                            returnError('not_allowed_operation_cluster', $returnType);
                            return false;
                        }
                    break;

                    case 'delete_user_permission':

                        if ($user_db === '') {
                            returnError(__('User or group not specified'), __('User, group not specified'));
                            return;
                        }

                        $id_os = api_set_delete_user_profiles($thrash1, $thrash2, $other, $returnType);

                        if ($id_os != 100) {
                            return;
                        }

                        if ($id_os == false) {
                            returnError('not_allowed_operation_cluster', $returnType);
                            return false;
                        }
                    break;

                    case 'add_permission_user_to_group':

                        if ($user_db == null || $group_db == null || $id_up == null) {
                            returnError(__('User, group or profile not specified'), __('User, group or profile status not specified'));
                            return;
                        }

                        $id_os = api_set_add_permission_user_to_group($thrash1, $thrash2, $other, $returnType);

                        if ($id_os != 100) {
                            return;
                        }

                        if ($id_os == false) {
                            returnError('not_allowed_operation_cluster', $returnType);
                            return false;
                        }
                    break;

                    default:

                        // break;
                }
            }
        }

        // Check if the function exists
        if (function_exists($function_name)) {
            if (!DEBUG) {
                error_reporting(0);
            }

            if (VERBOSE) {
                error_reporting(E_ALL);
                ini_set('display_errors', 1);
            }

            call_user_func($function_name, $id, $id2, $other, $returnType, $user_in_db);
        } else {
            returnError('no_exist_operation', $returnType);
        }
    }
} else {
    // TODO: Implement a new switch in config to enable / disable
    // ACL auth failure: if enabled and have lots of traffic can produce millions
    // of records and a considerable OVERHEAD in the system :(
    // db_pandora_audit("API access Failed", $no_login_msg, $user, $ipOrigin);
    sleep(15);

    // Protection on DoS attacks
    echo 'auth error';
}