use Digest::SHA1 qw(sha1);
sub getHexData {
    my ($key)= unpack("H*",shift);
    return $key; 
}

print "Enter the file path :";
my $file = <STDIN>;
chomp($file);
print "Enter chunk size :";
my $size = <STDIN>;
chomp($size);

open(FILE, $file) || die "Unable to open the file";
open(TEST,">sample.txt") || die("This file will not open!");
$len = read(FILE, $data, $size);
while ( $len != 0) {
  $datalen = $size == $len ? $size: $len;
  $digest = sha1($data);
  $keydata = getHexData($digest);
  $valuedata = getHexData($data);
  print TEST "$keydata=$valuedata\n";
  $len = read(FILE, $data, $size);
}
close (TEST);
close(FILE);

##</code><code>##

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