I've written the following simple program using Crypt:CBC to encrypt/decrypt the contents of a file. The file has multiple lines of data (with a newline character terminating each line) The problem is that once we encrypt the data file and then decrypt it..... the last line in the data file is only partially reproduced. It basically truncates the last line in the file. Here is the code: 
#!/usr/perl5/bin -w

use Crypt::CBC;

$inFile = "test.dat";
$cryptFile = "Crypt.dat";
$decrypFile = "DeCrypt.dat";

if ($#ARGV < 0) {
    print STDOUT "Invalid number of command line parameters! \n";
    exit(1);
}

$mode = shift @ARGV;

unless (($mode == 0) || ($mode == 1)) {
    print STDOUT "Invalid command line argument1 \n";
    exit(2);
}


$cipher = Crypt::CBC->new( {     'key'             => '18829298',
                'cipher'         => 'DES',
                'iv'            => '87654321',
                'regenerate_key'    => 0,
                'prepend_iv'        => 0 
               } );



if ($mode == 0) {
    open(INFILE, "<$inFile") || die "Error opening source file for inp
+ut! \n";
    open(CRYPTFILE, ">$cryptFile") || die "Error opening crypt file fo
+r output! \n";
    $cipher->start('encrypting');
    
    while (<INFILE>) {
        print CRYPTFILE $cipher->crypt($_);
    }

close INFILE;
close CRYPTFILE;    

}
else {
    open(CRYPTFILE, "<$cryptFile") || die "Error opening crypt file fo
+r input! \n";
    open(DECRYPFILE, ">$decrypFile") || die "Error opening decrypt fil
+e for output! \n";
    $cipher->start("decrypting");

    while (<CRYPTFILE>) {
        print DECRYPFILE $cipher->crypt($_);
    }
close CRYPTFILE;
close DECRYPFILE;
}

[download]
Any inputs as to why this is happening would be great to have! Thanks, KM

In reply to Crypt::CBC help! by Anonymous Monk

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