/**
* Replace hash()
*
* @category PHP
* @package PHP_Compat
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
* @copyright 2004-2007 Aidan Lister <*****@*****.**>, Arpad Ray <*****@*****.**>
* @link http://php.net/function.hash
* @author revulo <*****@*****.**>
* @since PHP 5.1.2
* @require PHP 4.0.0 (user_error)
*/
function php_compat_hash($algo, $data, $raw_output = false)
{
$algo = strtolower($algo);
switch ($algo) {
case 'md5':
$hash = md5($data);
break;
case 'sha1':
if (!function_exists('sha1')) {
require dirname(__FILE__) . '/sha1.php';
}
$hash = sha1($data);
break;
case 'sha256':
require_once dirname(__FILE__) . '/sha256.php';
$hash = SHA256::hash($data);
break;
default:
user_error('hash(): Unknown hashing algorithm: ' . $algo, E_USER_WARNING);
return false;
}
if ($raw_output) {
return pack('H*', $hash);
} else {
return $hash;
}
}
/**
* Creates SHA256 hash to obfuscate ips
*
* @param $ip ip address to be hashed
* @return string sha256-hashed ip
*/
function hash_it_the_oas_way($ip)
{
global $config;
$str = $ip . $config['hashsalt'];
// hashen (SHA256)
if (function_exists('mhash')) {
// mhash-Extension geladen
return bin2hex(mhash(MHASH_SHA256, $str));
} elseif (function_exists('hash')) {
// hash-Extension geladen
return hash('sha256', $str);
// untested
} else {
// native PHP-Implementation als (langsame) Alternative / Fallback
require_once 'sha256.php';
return SHA256::hash($str);
// untested
}
}
function testSpeedHash($it = 10)
{
$it = intval($it);
if ($it === 0) {
$it = 10;
}
set_time_limit(-1);
echo '<pre>' . "\n";
$test = array('' => 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855', 'abc' => 'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad', 'message digest' => 'f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650', 'secure hash algorithm' => 'f30ceb2bb2829e79e4ca9753d35a8ecc00262d164cc077080295381cbd643f0d', 'SHA256 is considered to be safe' => '6819d915c73f4d1e77e4e1b52d1fa0f9cf9beaead3939f15874bd988e2a23630', 'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq' => '248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1', 'For this sample, this 63-byte string will be used as input data' => 'f08a78cbbaee082b052ae0708f32fa1e50c5c421aa772ba5dbb406a2ea6be342', 'This is exactly 64 bytes long, not counting the terminating byte' => 'ab64eff7e88e2e46165e29f2bce41826bd4c7b3552f6b382a9e7d3af47c245f8');
foreach ($test as $str => $hash) {
echo 'Testing ' . var_export($str, true) . "\n";
echo 'Start time: ' . date('Y-m-d H:i:s') . "\n";
if ($it > 1) {
list($s1, $s2) = explode(' ', microtime());
$o = SHA256::hash($str);
list($e1, $e2) = explode(' ', microtime());
echo 'estimated time to perform test: ' . ($e2 - $s2 + $e1 - $s1) * $it . ' seconds for ' . $it . ' iterations.' . "\n";
}
$t = 0;
for ($x = 0; $x < $it; $x++) {
list($s1, $s2) = explode(' ', microtime());
$o = SHA256::hash($str);
list($e1, $e2) = explode(' ', microtime());
$t += $e2 - $s2 + $e1 - $s1;
}
echo var_export($o, true) . ' == ' . var_export($hash, true) . ' ' . (strcasecmp($o, $hash) == 0 ? 'PASSED' : 'FAILED') . "\n";
echo 'processing took ' . $t / $it . ' seconds.' . "\n\n\n";
}
echo '</pre>';
}
function strhash($str, $salt = true)
{
if ($salt === true) {
$str = md5($str) . $str;
} elseif ($salt !== false) {
$str = $salt . $str;
}
if (phpversion() >= '5.1.2' && @extension_loaded('pecl')) {
return hash('sha256', $str);
} else {
import('lib/sha256');
return SHA256::hash($str);
}
}
