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2 daniel-mar 1
<?php
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/*
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 * OIDplus 2.0
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 * Copyright 2019 Daniel Marschall, ViaThinkSoft
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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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,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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function insertWhitespace($str, $index) {
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        return substr($str, 0, $index) . ' ' . substr($str, $index);
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}
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function js_escape($data) {
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        // TODO.... json_encode??
289 daniel-mar 26
        $data = str_replace('\\', '\\\\', $data);
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        $data = str_replace('\'', '\\\'', $data);
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        return "'" . $data . "'";
2 daniel-mar 29
}
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11 daniel-mar 31
function trim_br($html) {
386 daniel-mar 32
        $count = 0;
11 daniel-mar 33
        do { $html = preg_replace('@^\s*<\s*br\s*/{0,1}\s*>@isU', '', $html, -1, $count); } while ($count > 0); // left trim
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        do { $html = preg_replace('@<\s*br\s*/{0,1}\s*>\s*$@isU', '', $html, -1, $count); } while ($count > 0); // right trim
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        return $html;
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}
74 daniel-mar 37
 
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function verify_private_public_key($privKey, $pubKey) {
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        try {
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                if (empty($privKey)) return false;
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                if (empty($pubKey)) return false;
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                $data = 'TEST';
386 daniel-mar 43
                $encrypted = '';
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                $decrypted = '';
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                if (!@openssl_public_encrypt($data, $encrypted, $pubKey)) return false;
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                if (!@openssl_private_decrypt($encrypted, $decrypted, $privKey)) return false;
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                return $decrypted == $data;
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        } catch (Exception $e) {
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                return false;
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        }
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}
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function smallhash($data) { // get 31 bits from SHA1. Values 0..2147483647
250 daniel-mar 54
        return (hexdec(substr(sha1($data),-4*2)) & 0x7FFFFFFF);
74 daniel-mar 55
}
180 daniel-mar 56
 
182 daniel-mar 57
function split_firstname_lastname($name) {
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        $ary = explode(' ', $name);
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        $last_name = array_pop($ary);
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        $first_name = implode(' ', $ary);
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        return array($first_name, $last_name);
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}
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180 daniel-mar 64
function originHeaders() {
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        // CORS
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        // Author: Till Wehowski
182 daniel-mar 67
 
180 daniel-mar 68
        header("Access-Control-Allow-Credentials: true");
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        header("Access-Control-Allow-Origin: ".strip_tags(((isset($_SERVER['HTTP_ORIGIN'])) ? $_SERVER['HTTP_ORIGIN'] : "*")));
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        header("Access-Control-Allow-Headers: If-None-Match, X-Requested-With, Origin, X-Frdlweb-Bugs, Etag, X-Forgery-Protection-Token, X-CSRF-Token");
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        if (isset($_SERVER['HTTP_ORIGIN'])) {
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                header('X-Frame-Options: ALLOW-FROM '.$_SERVER['HTTP_ORIGIN']);
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        } else {
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                header_remove("X-Frame-Options");
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        }
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        $expose = array('Etag', 'X-CSRF-Token');
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        foreach (headers_list() as $num => $header) {
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                $h = explode(':', $header);
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                $expose[] = trim($h[0]);
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        }
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        header("Access-Control-Expose-Headers: ".implode(',',$expose));
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        header("Vary: Origin");
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}
236 daniel-mar 88
 
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function get_calling_function() {
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        $ex = new Exception();
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        $trace = $ex->getTrace();
360 daniel-mar 92
        if (!isset($trace[2])) return _L('(main)');
236 daniel-mar 93
        $final_call = $trace[2];
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        return $final_call['file'].':'.$final_call['line'].'/'.$final_call['function'].'()';
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}
346 daniel-mar 96
 
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if (!function_exists('mb_wordwrap')) {
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        function mb_wordwrap($str, $width = 75, $break = "\n", $cut = false) {
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                // https://stackoverflow.com/a/4988494/488539
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                $lines = explode($break, $str);
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                foreach ($lines as &$line) {
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                        $line = rtrim($line);
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                        if (mb_strlen($line) <= $width) {
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                                continue;
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                        }
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                        $words = explode(' ', $line);
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                        $line = '';
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                        $actual = '';
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                        foreach ($words as $word) {
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                                if (mb_strlen($actual.$word) <= $width) {
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                                        $actual .= $word.' ';
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                                } else {
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                                        if ($actual != '') {
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                                                $line .= rtrim($actual).$break;
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                                        }
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                                        $actual = $word;
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                                        if ($cut) {
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                                                while (mb_strlen($actual) > $width) {
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                                                        $line .= mb_substr($actual, 0, $width).$break;
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                                                        $actual = mb_substr($actual, $width);
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                                                }
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                                        }
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                                        $actual .= ' ';
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                                }
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                        }
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                        $line .= trim($actual);
127
                }
128
                return implode($break, $lines);
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        }
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}
355 daniel-mar 131
 
379 daniel-mar 132
function httpOutWithETag($out, $contentType, $filename='') {
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        $etag = md5($out);
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        header("Etag: $etag");
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        header("Content-MD5: $etag"); // RFC 2616 clause 14.15
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        if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && (trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag)) {
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                header("HTTP/1.1 304 Not Modified");
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        } else {
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                header("Content-Type: $contentType");
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                if (!empty($filename)) {
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                        header('Content-Disposition:inline; filename="'.$filename.'"');
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                }
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                echo $out;
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        }
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        die();
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}
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360 daniel-mar 148
function my_vsprintf($str, $args) {
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        $n = 1;
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        foreach ($args as $val) {
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                $str = str_replace("%$n", $val, $str);
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                $n++;
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        }
370 daniel-mar 154
        $str = str_replace("%%", "%", $str);
360 daniel-mar 155
        return $str;
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}
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355 daniel-mar 158
function _L($str, ...$sprintfArgs) {
360 daniel-mar 159
        $lang = OIDplus::getCurrentLang();
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161
        static $translation_array = array();
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        static $translation_loaded = null;
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        if ($lang != $translation_loaded) {
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                $good = true;
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                if (strpos($lang,'/') !== false) $good = false; // prevent attack (but actually, the sanitization in getCurrentLang should work)
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                if (strpos($lang,'\\') !== false) $good = false; // prevent attack (but actually, the sanitization in getCurrentLang should work)
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                if (strpos($lang,'..') !== false) $good = false; // prevent attack (but actually, the sanitization in getCurrentLang should work)
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                $translation_file = __DIR__.'/../plugins/language/'.$lang.'/messages.xml';
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                if ($good && !file_exists($translation_file)) $good = false;
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                if ($good) {
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                        $xml = simplexml_load_string(file_get_contents($translation_file));
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                        foreach ($xml->message as $msg) {
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                                $src = trim($msg->source->__toString());
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                                $dst = trim($msg->target->__toString());
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                                $translation_array[$src] = $dst;
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                        }
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                        $translation_loaded = $lang;
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                }
179
        }
180
 
181
        if ($lang != $translation_loaded) {
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                // Something bad happened (e.g. attack or message file not found)
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                $res = $str;
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        } else {
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                $res = isset($translation_array[$str]) && !empty($translation_array[$str]) ? $translation_array[$str] : $str;
186
        }
187
 
188
        $res = str_replace('###', OIDplus::baseConfig()->getValue('TABLENAME_PREFIX', ''), $res);
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190
        $res = my_vsprintf($res, $sprintfArgs);
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192
        return $res;
370 daniel-mar 193
}
386 daniel-mar 194
 
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function extractHtmlContents($cont) {
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        // make sure the program works even if the user provided HTML is not UTF-8
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        $cont = iconv(mb_detect_encoding($cont, mb_detect_order(), true), 'UTF-8//IGNORE', $cont);
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        $bom = pack('H*','EFBBBF');
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        $cont = preg_replace("/^$bom/", '', $cont);
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201
        $out_js = '';
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        $m = array();
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        preg_match_all('@<script[^>]*>(.+)</script>@ismU', $cont, $m);
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        foreach ($m[1] as $x) {
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                $out_js = $x . "\n\n";
206
        }
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208
        $out_css = '';
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        $m = array();
210
        preg_match_all('@<style[^>]*>(.+)</style>@ismU', $cont, $m);
211
        foreach ($m[1] as $x) {
212
                $out_css = $x . "\n\n";
213
        }
214
 
215
        $out_html = $cont;
216
        $out_html = preg_replace('@^(.+)<body[^>]*>@isU', '', $out_html);
217
        $out_html = preg_replace('@</body>.+$@isU', '', $out_html);
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        $out_html = preg_replace('@<title>.+</title>@isU', '', $out_html);
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        $out_html = preg_replace('@<h1>.+</h1>@isU', '', $out_html, 1);
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        $out_html = preg_replace('@<script[^>]*>(.+)</script>@ismU', '', $out_html);
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        $out_html = preg_replace('@<style[^>]*>(.+)</style>@ismU', '', $out_html);
222
 
223
        return array($out_html, $out_js, $out_css);
224
}