mirror of
https://github.com/friendica/friendica
synced 2025-04-28 15:44:24 +02:00
Fix security vulnerbilities.
Fix possible length extension attack, predicable generators, timing attacks on hash comparision and improved formatting.
This commit is contained in:
dew-git
parent
50fa119f79
commit
811cdcdfcb
8 changed files with 455 additions and 332 deletions
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@ -1,4 +1,5 @@
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<?php
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/**
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* @file src/Util/Strings.php
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*/
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@ -13,13 +14,13 @@ use Friendica\Core\Logger;
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*/
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class Strings
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{
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/**
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* @brief Generates a pseudo-random string of hexadecimal characters
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*
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* @param int $size
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* @return string
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* @throws \Exception
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*/
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/**
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* @brief Generates a pseudo-random string of hexadecimal characters
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*
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* @param int $size
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* @return string
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* @throws \Exception
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*/
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public static function getRandomHex($size = 64)
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{
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$byte_size = ceil($size / 2);
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@ -31,16 +32,16 @@ class Strings
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return $return;
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}
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/**
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* Checks, if the given string is a valid hexadecimal code
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*
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* @param string $hexCode
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*
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* @return bool
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*/
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/**
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* Checks, if the given string is a valid hexadecimal code
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*
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* @param string $hexCode
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*
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* @return bool
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*/
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public static function isHex($hexCode)
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{
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return !empty($hexCode) ? @preg_match("/^[a-f0-9]{2,}$/i", $hexCode) && !(strlen($hexCode) & 1) : false;
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return !empty($hexCode) ? @preg_match("/^[a-f0-9]{2,}$/i", $hexCode) && !(strlen($hexCode) & 1) : false;
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}
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/**
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@ -62,19 +63,19 @@ class Strings
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* @brief Use this on "body" or "content" input where angle chars shouldn't be removed,
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* and allow them to be safely displayed.
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* @param string $string
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*
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*
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* @return string
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*/
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public static function escapeHtml($string)
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{
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return htmlspecialchars($string, ENT_COMPAT, 'UTF-8', false);
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return htmlentities($string, ENT_QUOTES | ENT_HTML5, "UTF-8", false);
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}
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/**
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* @brief Generate a string that's random, but usually pronounceable. Used to generate initial passwords
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*
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*
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* @param int $len length
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*
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*
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* @return string
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*/
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public static function getRandomName($len)
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@ -85,40 +86,44 @@ class Strings
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$vowels = ['a', 'a', 'ai', 'au', 'e', 'e', 'e', 'ee', 'ea', 'i', 'ie', 'o', 'ou', 'u'];
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if (mt_rand(0, 5) == 4) {
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if (random_int(0, 5) == 4) {
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$vowels[] = 'y';
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}
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$cons = [
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'b', 'bl', 'br',
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'c', 'ch', 'cl', 'cr',
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'd', 'dr',
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'f', 'fl', 'fr',
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'g', 'gh', 'gl', 'gr',
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'h',
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'j',
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'k', 'kh', 'kl', 'kr',
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'l',
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'm',
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'n',
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'p', 'ph', 'pl', 'pr',
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'qu',
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'r', 'rh',
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's' ,'sc', 'sh', 'sm', 'sp', 'st',
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't', 'th', 'tr',
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'v',
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'w', 'wh',
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'x',
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'z', 'zh'
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];
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'b', 'bl', 'br',
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'c', 'ch', 'cl', 'cr',
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'd', 'dr',
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'f', 'fl', 'fr',
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'g', 'gh', 'gl', 'gr',
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'h',
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'j',
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'k', 'kh', 'kl', 'kr',
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'l',
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'm',
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'n',
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'p', 'ph', 'pl', 'pr',
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'qu',
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'r', 'rh',
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's', 'sc', 'sh', 'sm', 'sp', 'st',
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't', 'th', 'tr',
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'v',
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'w', 'wh',
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'x',
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'z', 'zh'
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];
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$midcons = ['ck', 'ct', 'gn', 'ld', 'lf', 'lm', 'lt', 'mb', 'mm', 'mn', 'mp',
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'nd', 'ng', 'nk', 'nt', 'rn', 'rp', 'rt'];
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$midcons = [
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'ck', 'ct', 'gn', 'ld', 'lf', 'lm', 'lt', 'mb', 'mm', 'mn', 'mp',
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'nd', 'ng', 'nk', 'nt', 'rn', 'rp', 'rt'
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];
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$noend = ['bl', 'br', 'cl', 'cr', 'dr', 'fl', 'fr', 'gl', 'gr',
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'kh', 'kl', 'kr', 'mn', 'pl', 'pr', 'rh', 'tr', 'qu', 'wh', 'q'];
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$noend = [
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'bl', 'br', 'cl', 'cr', 'dr', 'fl', 'fr', 'gl', 'gr',
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'kh', 'kl', 'kr', 'mn', 'pl', 'pr', 'rh', 'tr', 'qu', 'wh', 'q'
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];
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$start = mt_rand(0, 2);
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$start = random_int(0, 2);
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if ($start == 0) {
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$table = $vowels;
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} else {
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@ -127,8 +132,8 @@ class Strings
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$word = '';
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for ($x = 0; $x < $len; $x ++) {
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$r = mt_rand(0, count($table) - 1);
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for ($x = 0; $x < $len; $x++) {
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$r = random_int(0, count($table) - 1);
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$word .= $table[$r];
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if ($table == $vowels) {
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@ -136,7 +141,6 @@ class Strings
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} else {
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$table = $vowels;
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}
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}
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$word = substr($word, 0, $len);
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@ -152,20 +156,20 @@ class Strings
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return $word;
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}
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/**
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* Translate and format the network name of a contact
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*
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* @param string $network Network name of the contact (e.g. dfrn, rss and so on)
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* @param string $url The contact url
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*
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* @return string Formatted network name
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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/**
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* Translate and format the network name of a contact
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*
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* @param string $network Network name of the contact (e.g. dfrn, rss and so on)
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* @param string $url The contact url
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*
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* @return string Formatted network name
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function formatNetworkName($network, $url = '')
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{
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if ($network != '') {
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if ($url != '') {
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$network_name = '<a href="' . $url .'">' . ContactSelector::networkToName($network, $url) . '</a>';
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$network_name = '<a href="' . $url . '">' . ContactSelector::networkToName($network, $url) . '</a>';
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} else {
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$network_name = ContactSelector::networkToName($network);
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}
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@ -176,11 +180,11 @@ class Strings
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/**
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* @brief Remove indentation from a text
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*
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*
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* @param string $text String to be transformed.
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* @param string $chr Optional. Indentation tag. Default tab (\t).
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* @param int $count Optional. Default null.
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*
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*
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* @return string Transformed string.
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*/
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public static function deindent($text, $chr = "[\t ]", $count = NULL)
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@ -206,10 +210,10 @@ class Strings
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/**
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* @brief Get byte size returned in a Data Measurement (KB, MB, GB)
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*
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*
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* @param int $bytes The number of bytes to be measured
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* @param int $precision Optional. Default 2.
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*
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*
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* @return string Size with measured units.
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*/
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public static function formatBytes($bytes, $precision = 2)
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@ -225,9 +229,9 @@ class Strings
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/**
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* @brief Protect percent characters in sprintf calls
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*
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*
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* @param string $s String to transform.
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*
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*
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* @return string Transformed string.
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*/
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public static function protectSprintf($s)
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@ -237,10 +241,10 @@ class Strings
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/**
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* @brief Base64 Encode URL and translate +/ to -_ Optionally strip padding.
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*
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*
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* @param string $s URL to encode
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* @param boolean $strip_padding Optional. Default false
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*
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*
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* @return string Encoded URL
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*/
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public static function base64UrlEncode($s, $strip_padding = false)
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@ -254,13 +258,13 @@ class Strings
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return $s;
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}
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/**
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* @brief Decode Base64 Encoded URL and translate -_ to +/
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* @param string $s URL to decode
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*
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* @return string Decoded URL
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* @throws \Exception
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*/
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/**
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* @brief Decode Base64 Encoded URL and translate -_ to +/
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* @param string $s URL to decode
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*
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* @return string Decoded URL
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* @throws \Exception
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*/
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public static function base64UrlDecode($s)
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{
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if (is_array($s)) {
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@ -291,7 +295,7 @@ class Strings
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* @brief Normalize url
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*
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* @param string $url URL to be normalized.
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*
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*
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* @return string Normalized URL.
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*/
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public static function normaliseLink($url)
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@ -302,9 +306,9 @@ class Strings
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/**
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* @brief Normalize OpenID identity
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*
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*
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* @param string $s OpenID Identity
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*
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*
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* @return string normalized OpenId Identity
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*/
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public static function normaliseOpenID($s)
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@ -329,51 +333,51 @@ class Strings
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}
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/**
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* Ensures the provided URI has its query string punctuation in order.
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*
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* @param string $uri
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* @return string
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*/
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public static function ensureQueryParameter($uri)
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{
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if (strpos($uri, '?') === false && ($pos = strpos($uri, '&')) !== false) {
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$uri = substr($uri, 0, $pos) . '?' . substr($uri, $pos + 1);
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}
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/**
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* Ensures the provided URI has its query string punctuation in order.
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*
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* @param string $uri
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* @return string
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*/
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public static function ensureQueryParameter($uri)
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{
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if (strpos($uri, '?') === false && ($pos = strpos($uri, '&')) !== false) {
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$uri = substr($uri, 0, $pos) . '?' . substr($uri, $pos + 1);
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}
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return $uri;
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}
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return $uri;
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}
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/**
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* Check if the trimmed provided string is starting with one of the provided characters
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*
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* @param string $string
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* @param array $chars
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* @return bool
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*/
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public static function startsWith($string, array $chars)
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{
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$return = in_array(substr(trim($string), 0, 1), $chars);
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/**
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* Check if the trimmed provided string is starting with one of the provided characters
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*
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* @param string $string
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* @param array $chars
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* @return bool
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*/
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public static function startsWith($string, array $chars)
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{
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$return = in_array(substr(trim($string), 0, 1), $chars);
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return $return;
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}
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return $return;
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}
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/**
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* Returns the regular expression string to match URLs in a given text
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*
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* @return string
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* @see https://daringfireball.net/2010/07/improved_regex_for_matching_urls
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*/
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public static function autoLinkRegEx()
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{
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return '@
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/**
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* Returns the regular expression string to match URLs in a given text
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*
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* @return string
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* @see https://daringfireball.net/2010/07/improved_regex_for_matching_urls
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*/
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public static function autoLinkRegEx()
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{
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return '@
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(?<![=\'\]"/]) # Not preceded by [, =, \', ], ", /
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\b
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( # Capture 1: entire matched URL
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https?:// # http or https protocol
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(?:
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[^/\s\xA0`!()\[\]{};:\'",<>?«»“”‘’.] # Domain can\'t start with a .
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[^/\s\xA0`!()\[\]{};:\'",<>?«»“”‘’.] # Domain can\'t start with a .
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[^/\s\xA0`!()\[\]{};:\'",<>?«»“”‘’]+ # Domain can\'t end with a .
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\.
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[^/\s\xA0`!()\[\]{};:\'".,<>?«»“”‘’]+/? # Followed by a slash
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@ -386,21 +390,21 @@ class Strings
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[^\s\xA0`!()\[\]{};:\'".,<>?«»“”‘’] # not a space or one of these punct chars
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)*
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)@xiu';
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}
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}
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/**
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* Ensures a single path item doesn't contain any path-traversing characters
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*
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* @see https://stackoverflow.com/a/46097713
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* @param string $pathItem
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* @return string
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*/
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public static function sanitizeFilePathItem($pathItem)
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{
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$pathItem = str_replace('/', '_', $pathItem);
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$pathItem = str_replace('\\', '_', $pathItem);
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$pathItem = str_replace(DIRECTORY_SEPARATOR, '_', $pathItem); // In case it does not equal the standard values
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/**
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* Ensures a single path item doesn't contain any path-traversing characters
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*
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* @see https://stackoverflow.com/a/46097713
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* @param string $pathItem
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* @return string
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*/
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public static function sanitizeFilePathItem($pathItem)
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{
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$pathItem = str_replace('/', '_', $pathItem);
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$pathItem = str_replace('\\', '_', $pathItem);
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$pathItem = str_replace(DIRECTORY_SEPARATOR, '_', $pathItem); // In case it does not equal the standard values
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return $pathItem;
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}
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return $pathItem;
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}
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}
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