It seems you don't need the Crypt::CBC module since you can use Crypt::Rijndael directly configured in CBC mode, as the following example (taken from the manual) shows: 

use Crypt::Rijndael;

 # keysize() is 32, but 24 and 16 are also possible
 # blocksize() is 16

 $cipher = Crypt::Rijndael->new( "a" x 32, Crypt::Rijndael::MODE_CBC()
+ ); # <-- key and CBC-MODE

 $cipher->set_iv($iv);  # <-- here's your I-Vector
 $crypted = $cipher->encrypt($plaintext);
        # - OR -
 $plaintext = $cipher->decrypt($crypted);

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If you provide the output of your programs or initialise the variables of your Perl program with meaningful values, more specific help on the Perl part might be possible. I am not sure if most of the Monks here have a C# development environment at hand in order to create their own cipher-texts ... at least I haven't.

In reply to Re: Encrypting a Message in C# with Rijndael and Decrypting it on Perl by Perlbotics
in thread Encrypting a Message in C# with Rijndael and Decrypting it on Perl by zeussn

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