CODEWITHSUNDEEP
phprubyhashbinary
Lennart Koopmann
Lennart Koopmann

Reputation: 21079

Ruby string to raw binary

in PHP there is the hash() function that can return raw binary data.

https://www.php.net/manual/en/function.hash.php

I want to do the same in Ruby. How do I do that?

I generate the hash with:

h = Digest::SHA2.new(512) << "hashme"

PHP generates 32 byte of "raw binary output".

Upvotes: 0

Views: 1319

Answers (1)

Brian
Brian

Reputation: 6840

If you need the output to be a length of 32, you just need to call Digest::SHA2.new with a bit length of 256 (which is the default):

irb> require 'digest/sha2'
=> true
irb> h = Digest::SHA2.new(256) << "hashme"
=> #<Digest::SHA2:256 02208b9403a87df9f4ed6b2ee2657efaa589026b4cce9accc8e8a5bf3d693c86>
irb> puts h.length
32
=> nil
irb> puts h
02208b9403a87df9f4ed6b2ee2657efaa589026b4cce9accc8e8a5bf3d693c86
=> nil

Or just:

irb> h = Digest::SHA2.new << "hashme"
=> #<Digest::SHA2:256 02208b9403a87df9f4ed6b2ee2657efaa589026b4cce9accc8e8a5bf3d693c86>
irb> puts h.length
32
=> nil
irb> puts h
02208b9403a87df9f4ed6b2ee2657efaa589026b4cce9accc8e8a5bf3d693c86
=> nil

Hope this helps!

Upvotes: 2

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