I'm on linux and using perl5.8.7, with the latest versions of both modules. This script used to run fine, last time I checked (maybe a year ago). But someone asked a question on the perl.crypto maillist, about experiencing corruption with Crypt::CBC and Crypt::Blowfish. So I tested my sample script again, and there was corruption in the output. Here is the script. It encrypts and decrypts itself. 
#!/usr/bin/perl
use warnings;
use strict;
use Crypt::CBC;

##----------- encryption ------------ 
my $cipher = Crypt::CBC->new( {'key'   => 'secretfoo',
                              'cipher'  => 'Blowfish',
                              'padding' => 'standard',
                           });

open(INF, "< $0" ) || die;
open(OUTF, ">$0.crypt") || die;

$cipher->start('encrypting');

   while (read(INF,my $buf, 1024 ) )
      {
      print OUTF $cipher->crypt($buf);
      }

print OUTF $cipher->finish;
close(INF);
close(OUTF);

##-------------------------- decryption -------------------- 

my $cipher1 = Crypt::CBC->new( {'key' => 'secretfoo',
                               'cipher' => 'Blowfish',
                               'padding' => 'standard',
                              });

open (INF1, "< $0.crypt") || die;
open (OUTF1, ">$0.decrypt") || die;

$cipher->start('decrypting');

while (read(INF1,my $buf, 1024 ) )
      {
            print OUTF1 $cipher->decrypt($buf);
      }

print OUTF1 $cipher->finish;
close(INF1);
close(OUTF1);
__END__

[download]

###############################################

and the corruption in the decoded output 

####
...........
...........
while (read(INF1,my $buf, 1024 ) )
      {
            print OUTF1 $cipher->decrypt($buf);
      }

pri.<d^KOb.Ï->finish;
close(INF1);
close(OUTF1);

[download]
I figure it is probably something simple, but I can't figure out what it is.
I'm not really a human, but I play one on earth. flash japh

In reply to Crypt::CBC with Blowfish problem by zentara

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