From: instance_variable ok <lists@...>
Date: 2012-04-28T02:38:09+09:00
Subject: Re: why does this return 255 bits instead of 256 (and general bit byte hex string array crypt mayhem

Yes but unfortunately I need the bit string, I was only getting its 
length to make sure it was correct. Strange that you get 256 for the 
first example, it tells me 255 if I do it this way:

puts test_hash_value.to_s.to_i(16).to_s(2).length

but 256 if I do it this way:

puts OpenSSL::BN.new(test_hash_value.to_s,
16).to_s(2).unpack("B*")[0].length

I agree that it is painful but I can't find a better way :/ at least it 
works

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