ldapsprintf.php
4f9915ecac81stable

ldapsprintf.php
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			<?php

			/**
			* Format an LDAP string. This function behaves like sprintf(), except that all
			* the normal conversions (like %s) will be properly escaped, and additional
			* conversions are supported:
			*
			* %S (Search Filter)
			* Escapes text for use in a search filter.
			*
			* %Q (Raw Query)
			* Inserts raw, unescaped text. DANGEROUS!
			*
			*/
			function ldap_sprintf($pattern /* , ... */) {
			$args = func_get_args();
			return xsprintf('xsprintf_ldap', null, $args);
			}

			/**
			* ldap_sprintf() callback for LDAP encoding.
			* @group markup
			*/
			function xsprintf_ldap($userdata, &$pattern, &$pos, &$value, &$length) {

			$type = $pattern[$pos];

			// https://www.owasp.org/index.php/Preventing_LDAP_Injection_in_Java

			switch ($type) {
			case 'S':
			$value = str_replace(
			array('\\', '*', '(', ')', "\0"),
			array('\\5c', '\\2a', '\\28', '\\29', '\\00'),
			$value);
			$type = 's';
			break;

			case 's':
			$value = addcslashes($value, ',\\#+<>;"= ');
			$type = 's';
			break;

			case 'Q':
			$type = 's';
			break;
			}

			$pattern[$pos] = $type;
			}