File

drupal-6.x/modules/openid/openid.inc, line 293

OpenID utility functions.

Code

function _openid_dh_long_to_binary($long) {
  $cmp = bccomp($long, 0);
  if ($cmp < 0) {
    return FALSE;
  }

  if ($cmp == 0) {
    return "\x00";
  }

  $bytes = array();

  while (bccomp($long, 0) > 0) {
    array_unshift($bytes, bcmod($long, 256));
    $long = bcdiv($long, pow(2, 8));
  }

  if ($bytes && ($bytes[0] > 127)) {
    array_unshift($bytes, 0);
  }

  $string = '';
  foreach ($bytes as $byte) {
    $string .= pack('C', $byte);
  }

  return $string;
}