<?php
/**
*
* @ This file is created by deZender.Net
* @ deZender (PHP5 Decoder for SourceGuardian & phpSHIELD)
*
* @    Version            :    1.1.6.0
* @    Author            :    DeZender
* @    Release on        :    02.06.2013
* @    Official site    :    http://DeZender.Net
*
*/

    /**
* Licensing Class.
*
* @author Andy Rockwell <andy@solidphp.com>
*/
    class licensing {
        /**
    * Validate licensing
    *
    * @param string $api_fingerprint
    * @param string $server
    * @param string $RPC
    * @param string $license
    * @return mixed string on error; array on success
    */
        static public function validate_license($api_fingerprint, $server, $RPC, $license) {
            $returned = licensing::parse_xml( licensing::validate_local_key(  ) );

            if (( $returned['status'] == 'grab_new_key' || $returned['status'] == 'expired' )) {
                $returned = licensing::parse_xml( licensing::go_remote( $method, $server, $license ) );

                if (empty( $returned )) {
                    $returned['status'] = 'invalid';
                }

                licensing::go_remote_api( $RPC, $api_fingerprint, $license );
                $returned = licensing::parse_xml( licensing::validate_local_key( true ) );
            }


            if (( $returned['status'] != 'active' && $returned['status'] != 'reissued' )) {
                if (empty( $returned )) {
                    $returned['status'] = 'invalid';
                }

                $errors = false;

                if ($returned['status'] == 'suspended') {
                    $errors = 'This license has been suspended.';
                } else {
                    if ($returned['status'] == 'pending') {
                        $errors = 'This license is pending admin approval.';
                    } else {
                        if ($returned['status'] == 'expired') {
                            $errors = 'This license is expired.';
                        } else {
                            if ($returned['status'] == 'renew') {
                                $errors = $returned['message'];
                            } else {
                                if (( $returned['status'] == 'active' && strcmp( md5( 'a666d67aae067313345c74abd7b666b0' . $token ), $returned['access_token'] ) != 0 )) {
                                    $errors = 'This license has an invalid checksum.';
                                } else {
                                    if (!empty( $errors )) {
                                        $errors = false;
                                    }

                                    $errors = 'This license appears to be invalid.';
                                }
                            }
                        }
                    }
                }
            }


            if (!empty( $errors )) {
                $errors = false;
            }

            return ($errors ? $errors : $returned);
        }

        /**
    * Write the local license key to somewhere.
    *
    * @param string $local_key        The local key data to write.
    * @return You choose.
    */
        static public function store_local_key($local_key) {
            $count = mysql_fetch_row( mysql_query( 'select count(*) from settings where set_name=\'license_local_key\'' ) );
            $query = 'update settings set set_value=\'' . $local_key . '\' where set_name=\'license_local_key\'';

            if (!$count[0]) {
                $query = ( 'insert into settings set set_name=\'license_local_key\', set_value=\'' . $local_key . '\'' );
            }

            return mysql_query( $query );
        }

        /**
    * Get the local key from where you stored it.
    *
    * @return string The local license key.
    */
        public function get_stored_local_key() {
            $local_key = mysql_fetch_assoc( mysql_query( 'select set_value from settings where set_name=\'license_local_key\' limit 0, 1' ) );
            return $local_key['set_value'];
        }

        /**
    * Write the best remote licensing method
    *
    * @param string $method Either phpaudit_exec_socket, phpaudit_exec_curl or file_get_contents
    * @return You choose.
    */
        static public function write_best_method($method) {
            $count = mysql_fetch_row( @mysql_query( 'select count(*) from settings where set_name=\'license_method\'' ) );
            $query = 'update settings set set_value=\'' . $method . '\' where set_name=\'license_method\'';

            if (!$count[0]) {
                $query = ( 'insert into settings set set_name=\'license_method\', set_value=\'' . $method . '\'' );
            }

            return mysql_query( $query );
        }

        /**
    * Get the best remote licensing method previously saved
    *
    * @return string The saved or default remote call method.
    */
        public function get_best_method() {
            $method = mysql_fetch_assoc( mysql_query( 'select set_value from settings where set_name=\'license_method\'' ) );

            if ($method['set_value']) {
                return $method['set_value'];
            }

            return 'phpaudit_exec_socket';
        }

        /**
    * Validate a local license key
    *
    * @return boolean $debug
    * @return array The results of validation.
    */
        static public function validate_local_key($debug = false) {
            $raw_array = licensing::parse_local_key(  );

            if (( !@is_array( $raw_array ) || $raw_array === false )) {
                return '<verify status=\'grab_new_key\' message=\'The local license key was empty.\' />';
            }


            if (( $raw_array[9] && strcmp( @md5( 'a666d67aae067313345c74abd7b666b0' . $raw_array[9] ), $raw_array[10] ) != 0 )) {
                return '<verify status=\'invalid\' message=\'The custom variables were tampered with.\' />';
            }


            if (strcmp( @md5( 'a666d67aae067313345c74abd7b666b0' . $raw_array[1] ), $raw_array[2] ) != 0) {
                return '<verify status=\'invalid\' message=\'The local license key checksum failed.\' ' . $raw_array[9] . ' />';
            }


            if (( $raw_array[1] < time(  ) && $raw_array[1] != 'never' )) {
                return '<verify status=\'expired\' message=\'Fetching a new local key.\' ' . $raw_array[9] . ' />';
            }


            if (( $raw_array[13] && strcmp( @md5( 'a666d67aae067313345c74abd7b666b0' . $raw_array[13] ), $raw_array[14] ) != 0 )) {
                return '<verify status=\'invalid\' message=\'The download controls were tampered with.\' />';
            }
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