Mod_perl side:
use MD5;

$date = get_todays_shortdate();  # 11/05/2004
$Private_secret = "This is my private server password"
$data = "this is my signed data."

$digest = MD5->hash("$date:$Private_secret:$data");

[download]
Send the digest and the data over to the other server and it knows the Private_secret and can verify that the data has been signed by constructing the same string calling md5->hash on it and comparing the two digests... If the hacker does not know the private_secret or the layout of the digest string then they cant forge the $data sig.


-Waswas

In reply to Re^3: [OT?] Sanity check... (On MD5, 3DES, Cookies and other animals) by waswas-fng
in thread [OT?] Sanity check... (On MD5, 3DES, Cookies and other animals) by smullis

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, details, 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, summary, 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.