I need to integrate an application on our site with a customer that is using a Trale Single Sever Signon utility that will pass me an AES encrypted string that I will decode by knowing the passphase and iv string.

The code is simple enough and seems to work just fine, 

        my $cipher = Crypt::CBC->new(
                -key    => $key,
                -cipher => $cipher1,
                -header => 'none',
                -iv    => $keyIV,
                -literal_key => 1,
        );             
        my $encrypted = $cipher->encrypt_hex($plaintext);
        my $decrypted = $cipher->decrypt_hex($encrypted);

[download]

My problem is that while I can encode and decode, the sample from the customer does decode properly at all. What I get is a lot of crazy characters that look like encoded data that hasn't been hex encoded.

My encrypted string is also quite a bit shorter than the sample supplied, so I'm wondering if it's a 128 versus 256 bit encoding issue?

If so, how do I force Crypt::CBC to use 256 bit?

Here's a sample of the output:

http://cgi.audioasylum.com/util/testcbc.pl

Thanks

In reply to 256 bit AEC encryption using Crypt::CBC by Anonymous Monk

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.