in reply to Accessing individual bytes of a binary file as numerical values

"...quite astonished at the apparent requirement to checksum a 'window'...calculate a checksum on the whole file..." (Marshall)

#MeToo. Probably this is yet another sick assignment by some sick professor?

For a more serious/practical use of checksums you might be happier using digest from Path::Tiny:

my $object = path($file)->digest($algorithm);. The default algorithm is SHA-256.

Best regards, Karl

«The Crux of the Biscuit is the Apostrophe»

perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help