hi ty for the answer, but i used rijndael_256, anf i can't decryp the text with http://rijndael.online-domain-tools.com/ i'll try to format my key to be in 16 blocksize.

print "\n---- Test6 -------- \n";
        my $key_6 = 'test-math';
        $key_6 .= "\0" x (16 - length($key_6));
        my $plaintext_6 = 'test-math';
        my $cipher_6 = Crypt::Rijndael->new( $key_6, Crypt::Rijndael::
+MODE_ECB );
        my $encrypted_6 = $cipher_6->encrypt($plaintext_6);
        printf "%02x", ord $_ for split //, $encrypted_6;
        print "---- Fin test 6 ---\n";
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i have an error like 'datasize not multiple of blocksize (16 bytes)' i'll find a way to use your code and adapt your code
thanks to your answer and i hope it work :)