Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I'm using a different bcrypt module, Crypt::Eksblowfish::Bcrypt, and am observing that instead of a hex digest, it stores both the settings and the salt in the output hash:

length = 11 $2a$11$WUHhXETkX0fnYkrqZU3ta.SjqJkrtBHwUGTHlTfGO1BINxczZnBJm length = 12 $2a$12$WUHhXETkX0fnYkrqZU3ta.D8cEIQdqzSrGG5wFTandtdP9Ypqzu0W

Therefore, your JSON-like storage should not be needed. This is the code I was using:

use Time::HiRes 'time'; use Crypt::Eksblowfish::Bcrypt qw(bcrypt en_base64); sub _salt() { return en_base64('abcdefghijklmnop'); } my $cost = sprintf("%02d", $ARGV[0]); my $settings = join( '$', '$2a', $cost, _salt() ); my $st = time(); print bcrypt("password", $settings), "\n"; printf "took %i milliseconds\n", (time() - $st) * 1000;

I suspect a cost of 11-14 is good enough to deter brute force and even some dictionary attacks on today's hardware, while not bogging down your server -- depending of course on the security requirements and the amount and frequency of users needing to log in.


In reply to Re: Adjust bcrypt cost to prevent future password hash attacks by Anonymous Monk
in thread Adjust bcrypt cost to prevent future password hash attacks by andreas1234567

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (7)
    As of 2018-11-21 19:52 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      My code is most likely broken because:
















      Results (249 votes). Check out past polls.

      Notices?