i am just now toying with using crypt::passwdmd5 and linux::passwd to create a script allowing users to change their existing passwords. however, i am trying to put some checking into the script to verify their existing password before accepting the new phrase.
i have the following:

if ($info[1] ne unix_md5_crypt($current, $salt)) {
  print "\nThe password you entered does not match your current passph
+rase!\n\n";
  exit;
}

[download]

now $info[1] is the value of the user's current encrypted password taken from /etc/shadow and $current is the chomp'd input from STDIN that the user provided for his/her current password.
i've added

print "$info[1]\n";
print unix_md5_crypt($current, $salt);

[download]

and sure enough the return from the crypt::passwdmd5 is shorter than the passphrase generated by the system (RH 7.1)
any suggestions on keys that i may have missed?

humbly -c

In reply to Comparing current password with one generated through Crypt::PasswdMD5 by c

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.