Archive for March, 2009

The YubiKing Award

Tuesday, March 10th, 2009

The YubiKing Award is to encourage innovation, creativity and entrepreneurship within the YubiKey developer’s community.   So, if you’ve checked out our YubiPAM module and you liked what you saw. Then please login to the Yubico Wiki with your awesome little Yubikey and cast your vote for our YubiPAM module and any other projects that you deem worthy.  But hurry as voting closes Friday 13th March.

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Securix 1.3 … RELOADED!

Tuesday, March 10th, 2009

Given the significant issue discovered in barnyard2 we have decided it would be in the best interest of new users to re-release Securix-NSM 1.3 with the updated barnyard2 binary. It is entirely possible that installation would not work as expected and ends up confusing the end user more than helping them get on with some good old NSM discovery.

We apologise for any inconvenience and ask that if you are having troubles confirm your ISO matches the md5 and if not, then re-download and check. Failing that hit us up and we’ll make sure your problem is fixed in a timely manner.

It’s the least we can do.

Posted in Securix-NSM | No Comments »

Perl Snippet … Encoding/Decoding in basE91

Saturday, March 7th, 2009

Whilst conduct some research for the one of our new projects I came across the need to transfer binary information over essentially a textual (i.e. printable character) protocol. I was sure that I would have to resort to base64 encoding but stumbled across basE91. This looked like it would fit the bill and so I grabbed the code and began to dissect its operation.

The code was available in C, ASM and PHP, at base91.sourceforge.net because the new project has Perl at its core there was some tweaking that needed to occur. I’ve attached a stripped version of my basE91 functions below for anyone who wants to get a taste of it.

#!/usr/bin/perl

@enctab = (
  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
  'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
  'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '!', '#', '$',
  '%', '&', '(', ')', '*', '+', ',', '.', '/', ':', ';', '<', '=',
  '>', '?', '@', '[', ']', '^', '_', '`', '{', '|', '}', '~', '"'
);

@dectab = (
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 62, 90, 63, 64, 65, 66, 91, 67, 68, 69, 70, 71, 91, 72, 73,
  52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 74, 75, 76, 77, 78, 79,
  80,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
  15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 81, 91, 82, 83, 84,
  85, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
  41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 86, 87, 88, 89, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91,
  91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91
);

sub base91_decode
{
  ($m) = @_;

  $l = length($m);
  $v = -1;
  $o = "";
  $b = 0;
  $n = 0;

  for ($i = 0; $i < $l; $i++)
  {
    $c = $dectab[ord(substr($m, $i, 1))];
 
    next if ($c == 91);

    if ($v < 0)
    {
      $v = $c;
    }
    else
    {
      $v += $c * 91;
      $b |= $v << $n;
      $n += ($v & 8191) > 88 ? 13 : 14;
      do
      {
        $o .= chr($b & 255);
        $b >>= 8;
        $n -= 8;
      } while ($n > 7);
      $v = -1;
    }
  }

  if ($v + 1)
  {
    $o .= chr(($b | $v << $n) & 255);
  }

  return $o;
}

sub base91_encode
{
  ($m) = @_;
  $l = length($m);
  $o = "";
  $b = 0;
  $n = 0;

  for ($i = 0; $i < $l; $i++)
  {
    $b |= ord(substr($m, $i, 1)) << $n;
    $n += 8;
    if ($n > 13)
    {
      $v = $b & 8191;
      if ($v > 88)
      {
        $b >>= 13;
        $n -= 13;
      }
      else
      {
        $v = $b & 16383;
        $b >>= 14;
        $n -= 14;
      }
      $o .= $enctab[$v % 91] . $enctab[$v / 91];
    }
  }
 
  if ($n)
  {
    $o .= $enctab[$b % 91];
    if ($n > 7 || $b > 90)
    {
      $o .= $enctab[$b / 91];
    }
  }
 
  return $o;
}

$test = "This is a test string.";
$test_enc = base91_encode($test);
$test_dec = base91_decode($test_enc);

print "Test (clr): $test\n";
print "Test (enc): $test_enc\n";
print "Test (dec): $test_dec\n";

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NSMnow 1.3.5 … You asked for it and now it’s hear … CLEAR!

Friday, March 6th, 2009

Although we said there would be no more features added to the 1.3 series an exception had to be made for the overwhelming feedback for a “clear/reset” function. So consider this your wish come true and you should be able to reset your sensors and servers with nsm_sensor_clear and nsm_server_clear respectively.

The barnyard2 link has also been updated to ensure you don’t get bitten by the waldo bug.

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Barnyard2-1.3 … Where’s waldo???

Friday, March 6th, 2009

Well it turns that that a rather strange bug crept it’s way into 1.2 that cause waldo file operations to go awry and eventually SEGFAULT. I hate SEGFAULTS!

In fact what was most puzzling was that it was only being triggered whilst I was debugging some (seemingly unrelated, but apparently not) remote syslogging/sguil conflict issues.  Anyway this update should fix said regression.

We apologise for any inconvenience this may have cause you.

Posted in Barnyard2 | No Comments »