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BESCMS/dayrui/Fcms/Library/Security.php
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<?php namespace Phpcmf\Library;
/**
* https://www.besyun.com
* BESCMS
* 本文件是框架系统文件，二次开发时不可以修改本文件，可以通过继承类方法来重写此文件
**/
/**
* 安全处理类
*/
class Security {
/**
* List of sanitize filename strings
*
* @var array
*/
public $filename_bad_chars = [
'../', '<!--', '-->', '<', '>',
"'", '"', '&', '$', '#',
'{', '}', '[', ']', '=',
';', '?', '%20', '%22',
'%3c', // <
'%253c', // <
'%3e', // >
'%0e', // >
'%28', // (
'%29', // )
'%2528', // (
'%26', // &
'%24', // $
'%3f', // ?
'%3b', // ;
'%3d' // =
];
protected $naughty_tags = [];
protected $evil_attributes = [];
/**
* Character set
*
* Will be overridden by the constructor.
*
* @var string
*/
public $charset = 'UTF-8';
/**
* XSS Hash
*
* Random Hash for protecting URLs.
*
* @var string
*/
protected $_xss_hash;
/**
* List of never allowed strings
*
* @var array
*/
protected $_never_allowed_str = [
'document.cookie' => '[xss_clean]',
'(document).cookie' => '[xss_clean]',
'document.write' => '[xss_clean]',
'(document).write' => '[xss_clean]',
'.parentNode' => '[xss_clean]',
'.innerHTML' => '[xss_clean]',
'-moz-binding' => '[xss_clean]',
'<!--' => '&lt;!--',
'-->' => '--&gt;',
'<![CDATA[' => '&lt;![CDATA[',
'<comment>' => '&lt;comment&gt;',
'<%' => '&lt;&#37;'
];
// 替换前的处理
protected $_never_call_str = [
'&quot;javascript:' => '&quot;javascript_xunruicms:',
];
/**
* List of never allowed regex replacements
*
* @var array
*/
protected $_never_allowed_regex = [
'javascript\s*:',
'(\(?document\)?|\(?window\)?(\.document)?)\.(location|on\w*)',
'expression\s*(\(|&\#40;)', // CSS and IE
'vbscript\s*:', // IE, surprise!
'wscript\s*:', // IE
'jscript\s*:', // IE
'vbs\s*:', // IE
'Redirect\s+30\d',
"([\"'])+data\s*:[^\\1]*?base64[^\\1]*?,[^\\1]*?\\1?"
];
// --------------------------------------------------------------------
/**
* XSS Clean
*
* Sanitizes data so that Cross Site Scripting Hacks can be
* prevented. This method does a fair amount of work but
* it is extremely thorough, designed to prevent even the
* most obscure XSS attempts. Nothing is ever 100% foolproof,
* of course, but I haven't been able to get anything passed
* the filter.
*
* Note: Should only be used to deal with data upon submission.
* It's not something that should be used for general
* runtime processing.
*
* @link http://channel.bitflux.ch/wiki/XSS_Prevention
* Based in part on some code and ideas from Bitflux.
*
* @link http://ha.ckers.org/xss.html
* To help develop this script I used this great list of
* vulnerabilities along with a few other hacks I've
* harvested from examining vulnerabilities in other programs.
*
* @param string|string[] $str Input data
* @param bool $is_image 严格的过滤
* @return string
*/
public function xss_clean($str, $is_image = FALSE)
{
if (is_numeric($str)) {
return $str;
} elseif (!$str) {
return '';
}
// Is the string an array?
if (is_array($str))
{
foreach ($str as $key => &$value)
{
$str[$key] = $this->xss_clean($value, $is_image);
}
return $str;
}
if (json_encode( $str) === false) {
return '[xss_clean]'; // 判断含有乱码直接过滤为空
}
$this->naughty_tags = [
'alert', 'area', 'prompt', 'confirm', 'applet', 'audio', 'basefont', 'base', 'behavior', 'bgsound',
'blink', 'body', 'expression', 'form', 'frameset', 'frame', 'head', 'html', 'ilayer',
'input', 'button', 'select', 'isindex', 'layer', 'link', 'meta', 'keygen', 'object',
'plaintext', 'script', 'textarea', 'title', 'math', 'svg', 'xml', 'xss',
//'iframe', 'video', 'embed', 'style' //排除过滤
];
$this->evil_attributes = [
'on\w+', 'xmlns', 'formaction', 'form', 'xlink:href', 'FSCommand', 'seekSegmentTime'
// ,'style' 排除过滤
];
if ($is_image) {
// 严格的过滤
$this->naughty_tags = dr_array2array($this->naughty_tags, array('iframe', 'video', 'embed', 'style'));
$this->evil_attributes = dr_array2array($this->evil_attributes, array('style'));
// 不进行二次编码的xss过滤
$str = preg_replace_callback("/[^a-z0-9>]+[a-z0-9]+=([\'\"]).*?\\1/si", array($this, '_convert_attribute'), $str);
$str = preg_replace_callback('/<\w+.*/si', array($this, '_decode_entity'), $str);
}
// Remove Invisible Characters Again!
$str = $this->_remove_invisible_characters($str);
/*
* Convert all tabs to spaces
*
* This prevents strings like this: ja vascript
* NOTE: we deal with spaces between characters later.
* NOTE: preg_replace was found to be amazingly slow here on
* large blocks of data, so we use str_replace.
*/
$str = str_replace("\t", ' ', $str);
// Capture converted string for later comparison
$converted_string = $str;
// Remove Strings that are never allowed
//$str = $this->_do_never_allowed($str);
/*
* Makes PHP tags safe
*
* Note: XML tags are inadvertently replaced too:
*
* <?xml
*
* But it doesn't seem to pose a problem.
*/
if ($is_image)
{
// Images have a tendency to have the PHP short opening and
// closing tags every so often so we skip those and only
// do the long opening tags.
$str = preg_replace('/<\?(php)/i', '&lt;?\\1', $str);
}
else
{
$str = str_replace(['<?', '?'.'>'], ['&lt;?', '?&gt;'], $str);
}
/*
* Compact any exploded words
*
* This corrects words like: j a v a s c r i p t
* These words are compacted back to their correct state.
*/
$words = [
'javascript', 'expression', 'vbscript', 'jscript', 'wscript',
'vbs', 'script', 'base64', 'applet', 'alert', 'document',
'write', 'cookie', 'window', 'confirm', 'prompt', 'eval'
];
foreach ($words as $word)
{
$word = implode('\s*', str_split($word)).'\s*';
// We only want to do this when it is followed by a non-word character
// That way valid stuff like "dealer to" does not become "dealerto"
$str = preg_replace_callback('#('.substr($word, 0, -3).')(\W)#is', array($this, '_compact_exploded_words'), $str);
}
/*
* Remove disallowed Javascript in links or img tags
* We used to do some version comparisons and use of stripos(),
* but it is dog slow compared to these simplified non-capturing
* preg_match(), especially if the pattern exists in the string
*
* Note: It was reported that not only space characters, but all in
* the following pattern can be parsed as separators between a tag name
* and its attributes: [\d\s"\'`;,\/\=\(\x00\x0B\x09\x0C]
* ... however, remove_invisible_characters() above already strips the
* hex-encoded ones, so we'll skip them below.
*/
$original2 = $str;
do
{
$original = $str;
if ($str && preg_match('/<a/i', $str))
{
$str = preg_replace_callback('#<a(?:rea)?[^a-z0-9>]+([^>]*?)(?:>|$)#si', array($this, '_js_link_removal'), $str);
}
/* 会影响编辑器base64格式图片本地化
if ($str && preg_match('/<img/i', $str))
{
$str = preg_replace_callback('#<img[^a-z0-9]+([^>]*?)(?:\s?/?>|$)#si', array($this, '_js_img_removal'), $str);
}*/
if ($str && preg_match('/script|xss/i', $str))
{
$str = preg_replace('#</*(?:script|xss).*?>#si', '[xss_clean]', $str);
}
}
while ($original !== $str);
unset($original);
if (!$str) {
return $str;
}
/*
* Sanitize naughty HTML elements
*
* If a tag containing any of the words in the list
* below is found, the tag gets converted to entities.
*
* So this: <blink>
* Becomes: &lt;blink&gt;
*/
$pattern = '#'
.'<((?<slash>/*\s*)((?<tagName>[a-z0-9]+)(?=[^a-z0-9]|$)|.+)' // tag start and name, followed by a non-tag character
.'[^\s\042\047a-z0-9>/=]*' // a valid attribute character immediately after the tag would count as a separator
// optional attributes
.'(?<attributes>(?:[\s\042\047/=]*' // non-attribute characters, excluding > (tag close) for obvious reasons
.'[^\s\042\047>/=]+' // attribute characters
// optional attribute-value
.'(?:\s*=' // attribute-value separator
.'(?:[^\s\042\047=><`]+|\s*\042[^\042]*\042|\s*\047[^\047]*\047|\s*(?U:[^\s\042\047=><`]*))' // single, double or non-quoted value
.')?' // end optional attribute-value group
.')*)' // end optional attributes group
.'[^>]*)(?<closeTag>\>)?#isS';
// Note: It would be nice to optimize this for speed, BUT
// only matching the naughty elements here results in
// false positives and in turn - vulnerabilities!
do
{
$old_str = $str;
$str = preg_replace_callback($pattern, array($this, '_sanitize_naughty_html'), $str);
}
while ($old_str !== $str);
unset($old_str);
/*
* Sanitize naughty scripting elements
*
* Similar to above, only instead of looking for
* tags it looks for PHP and JavaScript commands
* that are disallowed. Rather than removing the
* code, it simply converts the parenthesis to entities
* rendering the code un-executable.
*
* For example: eval('some code')
* Becomes: eval&#40;'some code'&#41;
*/
$str = preg_replace(
'#(alert|prompt|confirm|cmd|passthru|eval|exec|expression|system|fopen|fsockopen|file|file_get_contents|readfile|unlink)(\s*)\((.*?)\)#si',
'\\1\\2&#40;\\3&#41;',
$str
);
// Same thing, but for "tag functions" (e.g. eval`some code`)
// See https://github.com/bcit-ci/CodeIgniter/issues/5420
$str = preg_replace(
'#(alert|prompt|confirm|cmd|passthru|eval|exec|expression|system|fopen|fsockopen|file|file_get_contents|readfile|unlink)(\s*)`(.*?)`#si',
'\\1\\2&#96;\\3&#96;',
$str
);
//最终清理
//
////这增加了一点额外的预防措施
//
////有东西通过了上面的过滤器
$str = $this->_do_never_allowed($str);
// now the only remaining whitespace attacks are \t, \n, and \r
$ra = ['onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload'];
foreach ($ra as $t) {
$str = str_replace(' '.$t.'="', ' '.$t.'=', $str);
}
return $str;
}
protected function _remove_invisible_characters(string $str, bool $urlEncoded = true): string
{
$nonDisplayables = [];
// every control character except newline (dec 10),
// carriage return (dec 13) and horizontal tab (dec 09)
if ($urlEncoded) {
$nonDisplayables[] = '/%0[0-8bcef]/'; // url encoded 00-08, 11, 12, 14, 15
$nonDisplayables[] = '/%1[0-9a-f]/'; // url encoded 16-31
}
$nonDisplayables[] = '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S'; // 00-08, 11, 12, 14-31, 127
do {
$str = preg_replace($nonDisplayables, '', $str, -1, $count);
} while ($count);
return $str;
}
// --------------------------------------------------------------------
/**
* XSS Hash
*
* Generates the XSS hash if needed and returns it.
*
* @see CI_Security::$_xss_hash
* @return string XSS hash
*/
public function xss_hash()
{
if ($this->_xss_hash === NULL)
{
$rand = $this->get_random_bytes(16);
$this->_xss_hash = ($rand === FALSE)
? md5(uniqid(mt_rand(), TRUE))
: bin2hex($rand);
}
return $this->_xss_hash;
}
// --------------------------------------------------------------------
/**
* Get random bytes
*
* @param int $length Output length
* @return string
*/
public function get_random_bytes($length)
{
if (empty($length) OR ! ctype_digit((string) $length))
{
return FALSE;
}
if (function_exists('random_bytes'))
{
try
{
// The cast is required to avoid TypeError
return random_bytes((int) $length);
}
catch (Exception $e)
{
// If random_bytes() can't do the job, we can't either ...
// There's no point in using fallbacks.
log_message('error', $e->getMessage());
return FALSE;
}
}
// Unfortunately, none of the following PRNGs is guaranteed to exist ...
if (defined('MCRYPT_DEV_URANDOM') && ($output = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM)) !== FALSE)
{
return $output;
}
if (is_readable('/dev/urandom') && ($fp = fopen('/dev/urandom', 'rb')) !== FALSE)
{
// Try not to waste entropy ...
is_php('5.4') && stream_set_chunk_size($fp, $length);
$output = fread($fp, $length);
fclose($fp);
if ($output !== FALSE)
{
return $output;
}
}
if (function_exists('openssl_random_pseudo_bytes'))
{
return openssl_random_pseudo_bytes($length);
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* HTML Entities Decode
*
* A replacement for html_entity_decode()
*
* The reason we are not using html_entity_decode() by itself is because
* while it is not technically correct to leave out the semicolon
* at the end of an entity most browsers will still interpret the entity
* correctly. html_entity_decode() does not convert entities without
* semicolons, so we are left with our own little solution here. Bummer.
*
* @link http://php.net/html-entity-decode
*
* @param string $str Input
* @param string $charset Character set
* @return string
*/
public function entity_decode($str, $charset = NULL)
{
if (strpos($str, '&') === FALSE)
{
return $str;
}
static $_entities;
isset($charset) OR $charset = $this->charset;
$flag = is_php('5.4')
? ENT_COMPAT | ENT_HTML5
: ENT_COMPAT;
if ( ! isset($_entities))
{
$_entities = array_map('strtolower', get_html_translation_table(HTML_ENTITIES, $flag, $charset));
// If we're not on PHP 5.4+, add the possibly dangerous HTML 5
// entities to the array manually
if ($flag === ENT_COMPAT)
{
$_entities[':'] = '&colon;';
$_entities['('] = '&lpar;';
$_entities[')'] = '&rpar;';
$_entities["\n"] = '&NewLine;';
$_entities["\t"] = '&Tab;';
}
}
do
{
$str_compare = $str;
// Decode standard entities, avoiding false positives
if (preg_match_all('/&[a-z]{2,}(?![a-z;])/i', $str, $matches))
{
$replace = [];
$matches = array_unique(array_map('strtolower', $matches[0]));
foreach ($matches as &$match)
{
if (($char = array_search($match.';', $_entities, TRUE)) !== FALSE)
{
$replace[$match] = $char;
}
}
$str = str_replace(array_keys($replace), array_values($replace), $str);
}
// Decode numeric & UTF16 two byte entities
$str = html_entity_decode(
preg_replace('/(&#(?:x0*[0-9a-f]{2,5}(?![0-9a-f;])|(?:0*\d{2,4}(?![0-9;]))))/iS', '$1;', $str),
$flag,
$charset
);
if ($flag === ENT_COMPAT)
{
$str = str_replace(array_values($_entities), array_keys($_entities), $str);
}
}
while ($str_compare !== $str);
return $str;
}
// --------------------------------------------------------------------
/**
* Sanitize Filename
*
* @param string $str Input file name
* @param bool $relative_path Whether to preserve paths
* @return string
*/
public function sanitize_filename($str, $relative_path = FALSE)
{
$bad = $this->filename_bad_chars;
if ( ! $relative_path)
{
$bad[] = './';
$bad[] = '/';
}
$str = remove_invisible_characters($str, FALSE);
do
{
$old = $str;
$str = str_replace($bad, '', $str);
}
while ($old !== $str);
return stripslashes($str);
}
// ----------------------------------------------------------------
/**
* Strip Image Tags
*
* @param string $str
* @return string
*/
public function strip_image_tags($str)
{
return preg_replace(
array(
'#<img[\s/]+.*?src\s*=\s*(["\'])([^\\1]+?)\\1.*?\>#i',
'#<img[\s/]+.*?src\s*=\s*?(([^\s"\'=<>`]+)).*?\>#i'
),
'\\2',
$str
);
}
// ----------------------------------------------------------------
/**
* URL-decode taking spaces into account
*
* @see https://github.com/bcit-ci/CodeIgniter/issues/4877
* @param array $matches
* @return string
*/
protected function _urldecodespaces($matches)
{
$input = $matches[0];
$nospaces = preg_replace('#\s+#', '[xss_clean_space]', $input);
return ($nospaces === $input)
? $input
: rawurldecode($nospaces);
}
// ----------------------------------------------------------------
/**
* Compact Exploded Words
*
* Callback method for xss_clean() to remove whitespace from
* things like 'j a v a s c r i p t'.
*
* @used-by CI_Security::xss_clean()
* @param array $matches
* @return string
*/
protected function _compact_exploded_words($matches)
{
return preg_replace('/\s+/s', '', $matches[1]).$matches[2];
}
// --------------------------------------------------------------------
/**
* Sanitize Naughty HTML
*
* Callback method for xss_clean() to remove naughty HTML elements.
*
* @used-by CI_Security::xss_clean()
* @param array $matches
* @return string
*/
protected function _sanitize_naughty_html($matches)
{
// First, escape unclosed tags
if (empty($matches['closeTag']))
{
return '&lt;'.$matches[1];
}
// Is the element that we caught naughty? If so, escape it
elseif (in_array(strtolower($matches['tagName']), $this->naughty_tags, TRUE))
{
return '&lt;'.$matches[1].'&gt;';
}
// For other tags, see if their attributes are "evil" and strip those
elseif (isset($matches['attributes']))
{
// We'll store the already fitlered attributes here
$attributes = array();
// Attribute-catching pattern
$attributes_pattern = '#'
.'(?<name>[^\s\042\047>/=]+)' // attribute characters
// optional attribute-value
.'(?:\s*=(?<value>[^\s\042\047=><`]+|\s*\042[^\042]*\042|\s*\047[^\047]*\047|\s*(?U:[^\s\042\047=><`]*)))' // attribute-value separator
.'#i';
// Blacklist pattern for evil attribute names
$is_evil_pattern = '#^('.implode('|', $this->evil_attributes).')$#i';
// Each iteration filters a single attribute
do
{
// Strip any non-alpha characters that may precede an attribute.
// Browsers often parse these incorrectly and that has been a
// of numerous XSS issues we've had.
$matches['attributes'] = preg_replace('#^[^a-z]+#i', '', $matches['attributes']);
if ( ! preg_match($attributes_pattern, $matches['attributes'], $attribute, PREG_OFFSET_CAPTURE))
{
// No (valid) attribute found? Discard everything else inside the tag
break;
}
if (
// Is it indeed an "evil" attribute?
preg_match($is_evil_pattern, $attribute['name'][0])
// Or does it have an equals sign, but no value and not quoted? Strip that too!
OR (trim($attribute['value'][0]) === '')
)
{
if (CI_DEBUG) {
$attributes[] = 'xss_clean_'.$attribute[0][0];
} else {
$attributes[] = 'xss=clean';
}
}
else
{
$attributes[] = $attribute[0][0];
}
$matches['attributes'] = substr($matches['attributes'], $attribute[0][1] + strlen($attribute[0][0]));
}
while ($matches['attributes'] !== '');
$attributes = empty($attributes)
? ''
: ' '.implode(' ', $attributes);
return '<'.$matches['slash'].$matches['tagName'].$attributes.'>';
}
return $matches[0];
}
// --------------------------------------------------------------------
/**
* JS Link Removal
*
* Callback method for xss_clean() to sanitize links.
*
* This limits the PCRE backtracks, making it more performance friendly
* and prevents PREG_BACKTRACK_LIMIT_ERROR from being triggered in
* PHP 5.2+ on link-heavy strings.
*
* @used-by CI_Security::xss_clean()
* @param array $match
* @return string
*/
protected function _js_link_removal($match)
{
return str_replace(
$match[1],
preg_replace(
'#href=.*?(?:(?:alert|prompt|confirm)(?:\(|&\#40;)|javascript:|livescript:|mocha:|charset=|window\.|document\.|\.cookie|<script|<xss|d\s*a\s*t\s*a\s*:)#si',
'',
$this->_filter_attributes($match[1])
),
$match[0]
);
}
// --------------------------------------------------------------------
/**
* JS Image Removal
*
* Callback method for xss_clean() to sanitize image tags.
*
* This limits the PCRE backtracks, making it more performance friendly
* and prevents PREG_BACKTRACK_LIMIT_ERROR from being triggered in
* PHP 5.2+ on image tag heavy strings.
*
* @used-by CI_Security::xss_clean()
* @param array $match
* @return string
*/
protected function _js_img_removal($match)
{
return str_replace(
$match[1],
preg_replace(
'#src=.*?(?:(?:alert|prompt|confirm|eval)(?:\(|&\#40;|`|&\#96;)|javascript:|livescript:|mocha:|charset=|window\.|\(?document\)?\.|\.cookie|<script|<xss|base64\s*,)#si',
'',
$this->_filter_attributes($match[1])
),
$match[0]
);
}
// --------------------------------------------------------------------
/**
* Attribute Conversion
*
* @used-by CI_Security::xss_clean()
* @param array $match
* @return string
*/
protected function _convert_attribute($match)
{
return str_replace(['>', '<', '\\'], ['&gt;', '&lt;', '\\\\'], $match[0]);
}
// --------------------------------------------------------------------
/**
* Filter Attributes
*
* Filters tag attributes for consistency and safety.
*
* @used-by CI_Security::_js_img_removal()
* @used-by CI_Security::_js_link_removal()
* @param string $str
* @return string
*/
protected function _filter_attributes($str)
{
$out = '';
if (preg_match_all('#\s*[a-z\-]+\s*=\s*(\042|\047)([^\\1]*?)\\1#is', $str, $matches))
{
foreach ($matches[0] as $match)
{
$out .= preg_replace('#/\*.*?\*/#s', '', $match);
}
}
return $out;
}
// --------------------------------------------------------------------
/**
* HTML Entity Decode Callback
*
* @used-by CI_Security::xss_clean()
* @param array $match
* @return string
*/
protected function _decode_entity($match)
{
// Protect GET variables in URLs
// 901119URL5918AMP18930PROTECT8198
$match = preg_replace('|\&([a-z\_0-9\-]+)\=([a-z\_0-9\-/]+)|i', $this->xss_hash().'\\1=\\2', $match[0]);
// Decode, then un-protect URL GET vars
return str_replace(
$this->xss_hash(),
'&',
$this->entity_decode($match, $this->charset)
);
}
// --------------------------------------------------------------------
/**
* Do Never Allowed
*
* @used-by CI_Security::xss_clean()
* @param string
* @return string
*/
protected function _do_never_allowed($str)
{
$str = str_replace(array_keys($this->_never_call_str), $this->_never_call_str, $str);
$str = str_replace(array_keys($this->_never_allowed_str), $this->_never_allowed_str, $str);
$old = preg_replace_callback('#<pre(.+)</pre>#Us', function ($match) {
return '';
}, $str);
foreach ($this->_never_allowed_regex as $regex)
{
if (preg_match('#'.$regex.'#is', $old, $mt)) {
$str = preg_replace('#'.$regex.'#is', '_\\0', $str);
}
}
$str = str_replace($this->_never_call_str, array_keys($this->_never_call_str), $str);
return $str;
}
/**
* name名称值
*/
public function csrf_token()
{
return 'csrf_'.substr(md5(SYS_KEY), 0, 10);
}
/**
* 随机令牌
*/
public function csrf_hash()
{
$token = \Phpcmf\Service::L('cache')->get_auth_data('csrf_hash_'.SYS_KEY, SITE_ID, 86400);
if (!$token) {
$token = $this->csrf_update();
}
return $token;
}
/**
* 更新令牌
*/
public function csrf_update() {
$key = bin2hex(random_bytes(32));
\Phpcmf\Service::L('cache')->set_auth_data('csrf_hash_'.SYS_KEY, $key);
return $key;
}
}
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