Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Re: Re: base64 and hex question

by zakzebrowski (Curate)
on Apr 06, 2004 at 15:29 UTC ( #342962=note: print w/replies, xml ) Need Help??


in reply to Re: base64 and hex question
in thread base64 and hex question

This is the solution, I was looking for, thanks!


----
Zak - the office

Replies are listed 'Best First'.
Re: Re: Re: base64 and hex question
by tachyon (Chancellor) on Apr 07, 2004 at 03:59 UTC

    Am I missing the something. Just convert the base 64 to hex. The only issue is endianness and you can ignore that if you feel 2**127 is sufficient complexity for the task

    use Digest::MD5 qw( md5_hex md5_base64 ); use MIME::Base64; my $string = 'Am I missing something?'; my $hex = md5_hex( $string ); my $b64 = md5_base64( $string ); print "hex: $hex\nb64: $b64\n"; my $bin = decode_base64( $b64 ); my $h1 = join '', unpack "H*", $bin; # high nybble first my $h2 = join '', unpack "h*", $bin; # low nybble first print "h1: $h1\nh2: $h2\n"; # loose one bit of complexity for portablity print "Checksums are the same!\n" if $h1 eq $hex or $h2 eq $hex; __DATA__ hex: 8a4d8b4fa3d19e4e5c0755123b57a109 b64: ik2LT6PRnk5cB1USO1ehCQ h1: 8a4d8b4fa3d19e4e5c0755123b57a109 h2: a8d4b8f43a1de9e4c5705521b3751a90 Checksums are the same!

    cheers

    tachyon

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://342962]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (4)
As of 2020-08-03 13:13 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Which rocket would you take to Mars?










    Results (27 votes). Check out past polls.

    Notices?