mirror of
https://github.com/in3rsha/sha256-animation
synced 2024-05-21 01:16:04 +02:00
41 lines
747 B
Ruby
41 lines
747 B
Ruby
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# -----------
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# Shift Right
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# -----------
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def rotr(n, x)
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mask = 2**32 - 1
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right = (x >> n) & mask
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left = (x << 32-n) & mask
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result = right | left
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return result
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end
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# -----
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# Input
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# -----
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# defaults
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x = 0b11111111000000001111111100000000 #0b11101001101101011101101110100101
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n = 32
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# arguments passed
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x = ARGV[0].to_i(2) if ARGV[0] # binary
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n = ARGV[1].to_i if ARGV[1] # integer
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# check arguments
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if ARGV[0] && ARGV[0].size > 32
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puts "We only operate on 32-bit words in SHA-256. Your x is #{ARGV[0].size} bits."; exit
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end
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# ---------
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# Animation
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# ---------
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s = n.to_s.ljust(2, " ")
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n.times do |i|
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system "clear"
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i += 1
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puts " x: #{"%032b" % x}"
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puts "ROTR #{s}: #{"%032b" % rotr(i, x)}"
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sleep 0.10
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end
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sleep 0.5
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