<?php

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/**

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* Copyright 2016 Freemius, Inc.

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*

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* Licensed under the GPL v2 (the "License"); you may

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* not use this file except in compliance with the License. You may obtain

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* a copy of the License at

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*

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* http://choosealicense.com/licenses/gpl-v2/

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*

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* Unless required by applicable law or agreed to in writing, software

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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

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* License for the specific language governing permissions and limitations

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* under the License.

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*/

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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require_once dirname( __FILE__ ) . '/FreemiusBase.php';

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if ( ! defined( 'FS_SDK__USER_AGENT' ) ) {

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define( 'FS_SDK__USER_AGENT', 'fs-php-' . Freemius_Api_Base::VERSION );

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}

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if ( ! defined( 'FS_SDK__SIMULATE_NO_CURL' ) ) {

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define( 'FS_SDK__SIMULATE_NO_CURL', false );

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}

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if ( ! defined( 'FS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE' ) ) {

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define( 'FS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE', false );

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}

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if ( ! defined( 'FS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL' ) ) {

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define( 'FS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL', false );

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}

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if ( ! defined( 'FS_SDK__HAS_CURL' ) ) {

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if ( FS_SDK__SIMULATE_NO_CURL ) {

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define( 'FS_SDK__HAS_CURL', false );

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} else {

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$curl_required_methods = array(

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'curl_version',

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'curl_exec',

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'curl_init',

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'curl_close',

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'curl_setopt',

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'curl_setopt_array',

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'curl_error',

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);

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$has_curl = true;

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foreach ( $curl_required_methods as $m ) {

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if ( ! function_exists( $m ) ) {

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$has_curl = false;

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break;

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}

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}

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define( 'FS_SDK__HAS_CURL', $has_curl );

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}

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}

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if ( ! defined( 'FS_SDK__SSLVERIFY' ) ) {

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define( 'FS_SDK__SSLVERIFY', false );

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}

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$curl_version = FS_SDK__HAS_CURL ?

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curl_version() :

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array( 'version' => '7.37' );

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if ( ! defined( 'FS_API__PROTOCOL' ) ) {

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define( 'FS_API__PROTOCOL', version_compare( $curl_version['version'], '7.37', '>=' ) ? 'https' : 'http' );

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}

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if ( ! defined( 'FS_API__LOGGER_ON' ) ) {

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define( 'FS_API__LOGGER_ON', false );

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}

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if ( ! defined( 'FS_API__ADDRESS' ) ) {

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define( 'FS_API__ADDRESS', '://api.freemius.com' );

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}

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if ( ! defined( 'FS_API__SANDBOX_ADDRESS' ) ) {

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define( 'FS_API__SANDBOX_ADDRESS', '://sandbox-api.freemius.com' );

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}

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if ( ! class_exists( 'Freemius_Api_WordPress' ) ) {

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class Freemius_Api_WordPress extends Freemius_Api_Base {

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private static $_logger = array();

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/**

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* @param string $pScope 'app', 'developer', 'user' or 'install'.

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* @param number $pID Element's id.

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* @param string $pPublic Public key.

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* @param string|bool $pSecret Element's secret key.

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* @param bool $pSandbox Whether or not to run API in sandbox mode.

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*/

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public function __construct( $pScope, $pID, $pPublic, $pSecret = false, $pSandbox = false ) {

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// If secret key not provided, use public key encryption.

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if ( is_bool( $pSecret ) ) {

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$pSecret = $pPublic;

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}

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parent::Init( $pScope, $pID, $pPublic, $pSecret, $pSandbox );

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}

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public static function GetUrl( $pCanonizedPath = '', $pIsSandbox = false ) {

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$address = ( $pIsSandbox ? FS_API__SANDBOX_ADDRESS : FS_API__ADDRESS );

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if ( ':' === $address[0] ) {

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$address = self::$_protocol . $address;

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}

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return $address . $pCanonizedPath;

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}

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#----------------------------------------------------------------------------------

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#region Servers Clock Diff

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#----------------------------------------------------------------------------------

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/**

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* @var int Clock diff in seconds between current server to API server.

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*/

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private static $_clock_diff = 0;

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/**

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* Set clock diff for all API calls.

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*

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* @since 1.0.3

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*

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* @param $pSeconds

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*/

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public static function SetClockDiff( $pSeconds ) {

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self::$_clock_diff = $pSeconds;

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}

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/**

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* Find clock diff between current server to API server.

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*

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* @since 1.0.2

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* @return int Clock diff in seconds.

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*/

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public static function FindClockDiff() {

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$time = time();

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$pong = self::Ping();

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return ( $time - strtotime( $pong->timestamp ) );

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}

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#endregion

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/**

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* @var string http or https

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*/

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private static $_protocol = FS_API__PROTOCOL;

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/**

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* Set API connection protocol.

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*

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* @since 1.0.4

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*/

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public static function SetHttp() {

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self::$_protocol = 'http';

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}

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/**

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* Sets API connection protocol to HTTPS.

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*

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* @since 2.5.4

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*/

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public static function SetHttps() {

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self::$_protocol = 'https';

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}

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/**

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* @since 1.0.4

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*

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* @return bool

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*/

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public static function IsHttps() {

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return ( 'https' === self::$_protocol );

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}

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/**

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* Sign request with the following HTTP headers:

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* Content-MD5: MD5(HTTP Request body)

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* Date: Current date (i.e Sat, 14 Feb 2016 20:24:46 +0000)

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* Authorization: FS {scope_entity_id}:{scope_entity_public_key}:base64encode(sha256(string_to_sign,

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* {scope_entity_secret_key}))

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*

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* @param string $pResourceUrl

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* @param array $pWPRemoteArgs

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*

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* @return array

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*/

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function SignRequest( $pResourceUrl, $pWPRemoteArgs ) {

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$auth = $this->GenerateAuthorizationParams(

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$pResourceUrl,

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$pWPRemoteArgs['method'],

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! empty( $pWPRemoteArgs['body'] ) ? $pWPRemoteArgs['body'] : ''

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);

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$pWPRemoteArgs['headers']['Date'] = $auth['date'];

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$pWPRemoteArgs['headers']['Authorization'] = $auth['authorization'];

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if ( ! empty( $auth['content_md5'] ) ) {

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$pWPRemoteArgs['headers']['Content-MD5'] = $auth['content_md5'];

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}

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return $pWPRemoteArgs;

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}

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/**

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* Generate Authorization request headers:

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*

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* Content-MD5: MD5(HTTP Request body)

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* Date: Current date (i.e Sat, 14 Feb 2016 20:24:46 +0000)

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* Authorization: FS {scope_entity_id}:{scope_entity_public_key}:base64encode(sha256(string_to_sign,

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* {scope_entity_secret_key}))

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*

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* @author Vova Feldman

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*

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* @param string $pResourceUrl

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* @param string $pMethod

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* @param string $pPostParams

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*

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* @return array

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* @throws Freemius_Exception

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*/

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function GenerateAuthorizationParams(

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$pResourceUrl,

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$pMethod = 'GET',

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$pPostParams = ''

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) {

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$pMethod = strtoupper( $pMethod );

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$eol = "\n";

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$content_md5 = '';

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$content_type = '';

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$now = ( time() - self::$_clock_diff );

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$date = date( 'r', $now );

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if ( in_array( $pMethod, array( 'POST', 'PUT' ) ) ) {

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$content_type = 'application/json';

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if ( ! empty( $pPostParams ) ) {

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$content_md5 = md5( $pPostParams );

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}

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}

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$string_to_sign = implode( $eol, array(

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$pMethod,

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$content_md5,

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$content_type,

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$date,

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$pResourceUrl

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) );

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// If secret and public keys are identical, it means that

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// the signature uses public key hash encoding.

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$auth_type = ( $this->_secret !== $this->_public ) ? 'FS' : 'FSP';

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$auth = array(

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'date' => $date,

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'authorization' => $auth_type . ' ' . $this->_id . ':' .

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$this->_public . ':' .

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self::Base64UrlEncode( hash_hmac(

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'sha256', $string_to_sign, $this->_secret

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) )

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);

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if ( ! empty( $content_md5 ) ) {

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$auth['content_md5'] = $content_md5;

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}

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return $auth;

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}

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/**

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* Get API request URL signed via query string.

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*

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* @since 1.2.3 Stopped using http_build_query(). Instead, use urlencode(). In some environments the encoding of http_build_query() can generate a URL that once used with a redirect, the `&` querystring separator is escaped to `&amp;` which breaks the URL (Added by @svovaf).

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*

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* @param string $pPath

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*

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* @throws Freemius_Exception

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*

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* @return string

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*/

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function GetSignedUrl( $pPath ) {

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$resource = explode( '?', $this->CanonizePath( $pPath ) );

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$pResourceUrl = $resource[0];

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$auth = $this->GenerateAuthorizationParams( $pResourceUrl );

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return Freemius_Api_WordPress::GetUrl(

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$pResourceUrl . '?' .

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( 1 < count( $resource ) && ! empty( $resource[1] ) ? $resource[1] . '&' : '' ) .

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'authorization=' . urlencode( $auth['authorization'] ) .

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'&auth_date=' . urlencode( $auth['date'] )

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, $this->_isSandbox );

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}

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[303] Fix | Delete

/**

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* @author Vova Feldman

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*

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* @param string $pUrl

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* @param array $pWPRemoteArgs

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*

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* @return mixed

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*/

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private static function ExecuteRequest( $pUrl, &$pWPRemoteArgs ) {

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$bt = debug_backtrace();

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$start = microtime( true );

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$response = self::RemoteRequest( $pUrl, $pWPRemoteArgs );

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if ( FS_API__LOGGER_ON ) {

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$end = microtime( true );

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$has_body = ( isset( $pWPRemoteArgs['body'] ) && ! empty( $pWPRemoteArgs['body'] ) );

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$is_http_error = is_wp_error( $response );

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self::$_logger[] = array(

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'id' => count( self::$_logger ),

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'start' => $start,

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'end' => $end,

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'total' => ( $end - $start ),

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'method' => $pWPRemoteArgs['method'],

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'path' => $pUrl,

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'body' => $has_body ? $pWPRemoteArgs['body'] : null,

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'result' => ! $is_http_error ?

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$response['body'] :

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json_encode( $response->get_error_messages() ),

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'code' => ! $is_http_error ? $response['response']['code'] : null,

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'backtrace' => $bt,

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);

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}

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return $response;

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}

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[343] Fix | Delete

/**

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* @author Leo Fajardo (@leorw)

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*

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* @param string $pUrl

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* @param array $pWPRemoteArgs

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*

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* @return array|WP_Error The response array or a WP_Error on failure.

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*/

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static function RemoteRequest( $pUrl, $pWPRemoteArgs ) {

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$response = wp_remote_request( $pUrl, $pWPRemoteArgs );

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if (

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is_array( $response ) &&

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(

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empty( $response['headers'] ) ||

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empty( $response['headers']['x-api-server'] )

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)

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) {

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// API is considered blocked if the response doesn't include the `x-api-server` header. When there's no error but this header doesn't exist, the response is usually not in the expected form (e.g., cannot be JSON-decoded).

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$response = new WP_Error( 'api_blocked', htmlentities( $response['body'] ) );

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}

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return $response;

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}

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/**

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* @return array

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*/

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static function GetLogger() {

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return self::$_logger;

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}

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/**

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* @param string $pCanonizedPath

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* @param string $pMethod

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* @param array $pParams

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* @param null|array $pWPRemoteArgs

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* @param bool $pIsSandbox

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* @param null|callable $pBeforeExecutionFunction

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*

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* @return object[]|object|null

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*

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* @throws \Freemius_Exception

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*/

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private static function MakeStaticRequest(

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$pCanonizedPath,

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$pMethod = 'GET',

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$pParams = array(),

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$pWPRemoteArgs = null,

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$pIsSandbox = false,

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$pBeforeExecutionFunction = null

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) {

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// Connectivity errors simulation.

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if ( FS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE ) {

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self::ThrowCloudFlareDDoSException();

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} else if ( FS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL ) {

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self::ThrowSquidAclException();

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}

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if ( empty( $pWPRemoteArgs ) ) {

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$user_agent = 'Freemius/WordPress-SDK/' . Freemius_Api_Base::VERSION . '; ' .

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home_url();

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$pWPRemoteArgs = array(

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'method' => strtoupper( $pMethod ),

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'connect_timeout' => 10,

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'timeout' => 60,

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'follow_redirects' => true,

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'redirection' => 5,

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'user-agent' => $user_agent,

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'blocking' => true,

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);

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}

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if ( ! isset( $pWPRemoteArgs['headers'] ) ||

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! is_array( $pWPRemoteArgs['headers'] )

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) {

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$pWPRemoteArgs['headers'] = array();

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}

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if ( in_array( $pMethod, array( 'POST', 'PUT' ) ) ) {

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$pWPRemoteArgs['headers']['Content-type'] = 'application/json';

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if ( is_array( $pParams ) && 0 < count( $pParams ) ) {

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$pWPRemoteArgs['body'] = json_encode( $pParams );

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}

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}

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$request_url = self::GetUrl( $pCanonizedPath, $pIsSandbox );

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$resource = explode( '?', $pCanonizedPath );

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[435] Fix | Delete

if ( FS_SDK__HAS_CURL ) {

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// Disable the 'Expect: 100-continue' behaviour. This causes cURL to wait

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// for 2 seconds if the server does not support this header.

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$pWPRemoteArgs['headers']['Expect'] = '';

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}

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[441] Fix | Delete

if ( 'https' === substr( strtolower( $request_url ), 0, 5 ) ) {

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$pWPRemoteArgs['sslverify'] = FS_SDK__SSLVERIFY;

[443] Fix | Delete

}

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[445] Fix | Delete

if ( false !== $pBeforeExecutionFunction &&

[446] Fix | Delete

is_callable( $pBeforeExecutionFunction )

[447] Fix | Delete

) {

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$pWPRemoteArgs = call_user_func( $pBeforeExecutionFunction, $resource[0], $pWPRemoteArgs );

[449] Fix | Delete

}

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[451] Fix | Delete

$result = self::ExecuteRequest( $request_url, $pWPRemoteArgs );

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if ( is_wp_error( $result ) ) {

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/**

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* @var WP_Error $result

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*/

[457] Fix | Delete

if ( self::IsCurlError( $result ) ) {

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/**

[459] Fix | Delete

* With dual stacked DNS responses, it's possible for a server to

[460] Fix | Delete

* have IPv6 enabled but not have IPv6 connectivity. If this is

[461] Fix | Delete

* the case, cURL will try IPv4 first and if that fails, then it will

[462] Fix | Delete

* fall back to IPv6 and the error EHOSTUNREACH is returned by the

[463] Fix | Delete

* operating system.

[464] Fix | Delete

*/

[465] Fix | Delete

$matches = array();

[466] Fix | Delete

$regex = '/Failed to connect to ([^:].*): Network is unreachable/';

[467] Fix | Delete

if ( preg_match( $regex, $result->get_error_message( 'http_request_failed' ), $matches ) ) {

[468] Fix | Delete

/**

[469] Fix | Delete

* Validate IP before calling `inet_pton()` to avoid PHP un-catchable warning.

[470] Fix | Delete

* @author Vova Feldman (@svovaf)

[471] Fix | Delete

*/

[472] Fix | Delete

if ( filter_var( $matches[1], FILTER_VALIDATE_IP ) ) {

[473] Fix | Delete

if ( strlen( inet_pton( $matches[1] ) ) === 16 ) {

[474] Fix | Delete

/**

[475] Fix | Delete

* error_log('Invalid IPv6 configuration on server, Please disable or get native IPv6 on your server.');

[476] Fix | Delete

* Hook to an action triggered just before cURL is executed to resolve the IP version to v4.

[477] Fix | Delete

*

[478] Fix | Delete

* @phpstan-ignore-next-line

[479] Fix | Delete

*/

[480] Fix | Delete

add_action( 'http_api_curl', 'Freemius_Api_WordPress::CurlResolveToIPv4', 10, 1 );

[481] Fix | Delete

[482] Fix | Delete

// Re-run request.

[483] Fix | Delete

$result = self::ExecuteRequest( $request_url, $pWPRemoteArgs );

[484] Fix | Delete

}

[485] Fix | Delete

}

[486] Fix | Delete

}

[487] Fix | Delete

}

[488] Fix | Delete

[489] Fix | Delete

if ( is_wp_error( $result ) ) {

[490] Fix | Delete

self::ThrowWPRemoteException( $result );

[491] Fix | Delete

}

[492] Fix | Delete

}

[493] Fix | Delete

[494] Fix | Delete

$response_body = $result['body'];

[495] Fix | Delete

[496] Fix | Delete

if ( empty( $response_body ) ) {

[497] Fix | Delete

return null;

[498] Fix | Delete

}

[499] Fix | Delete