Exemplo n.º 1
0
 static function hmacsha256($data, $key)
 {
     if (function_exists('hash_hmac')) {
         return hash_hmac('sha256', $data, $key, true);
     }
     if (!class_exists('nanoSha2', false)) {
         require 'nanoSha2.php';
     }
     $nanoSha2 = new nanoSha2();
     $blocksize = 64;
     if (strlen($key) > $blocksize) {
         $key = pack('H*', $nanoSha2->hash($key, true));
     }
     $key = str_pad($key, $blocksize, chr(0x0));
     $ipad = str_repeat(chr(0x36), $blocksize);
     $opad = str_repeat(chr(0x5c), $blocksize);
     $hmac = pack('H*', $nanoSha2->hash(($key ^ $opad) . pack('H*', $nanoSha2->hash(($key ^ $ipad) . $data, true)), true));
     return $hmac;
 }
Exemplo n.º 2
0
/**
 * Main routine called from an application using this include.
 *
 * General usage:
 *   require_once('sha256.inc.php');
 *   $hashstr = sha256('abc');
 *
 * Note:
 * PHP Strings are limitd to (2^31)-1, so it is not worth it to
 * check for input strings > 2^64 as the FIPS180-2 defines.
 */
function _nano_sha256($str, $ig_func = true) {
    $obj = new nanoSha2((defined('_NANO_SHA2_UPPER')) ? true : false);
    return $obj->hash($str, $ig_func);
}
Exemplo n.º 3
0
/**
 * Generates a SHA256 using whatever methods are available. If no valid function can be found, the data will be returned unhashed.
 *
 * @param string $data - The data to encrypt.
 * @return string - Encrypted data.
 * @author Joseph Todd Parsons <*****@*****.**>
 */
function fim_sha256($data)
{
    global $config;
    if (function_exists('hash') && in_array('sha256', hash_algos())) {
        return hash('sha256', $data);
    } elseif (function_exists('mhash') && defined('MHASH_SHA256')) {
        return mhash(MHASH_SHA256, $data);
    } else {
        // Otherwise, we use a third-party SHA256 library. Expect slowness. [TODO: Test]
        require 'functions/sha256.php';
        // Require SHA256 class provided by NanoLink.ca.
        $obj = new nanoSha2();
        $shaStr = $obj->hash($data);
    }
}