mirror of
https://github.com/in3rsha/sha256-animation
synced 2024-05-03 22:26:13 +02:00
41 lines
747 B
Ruby
41 lines
747 B
Ruby
# -----------
|
|
# Shift Right
|
|
# -----------
|
|
def rotr(n, x)
|
|
mask = 2**32 - 1
|
|
right = (x >> n) & mask
|
|
left = (x << 32-n) & mask
|
|
result = right | left
|
|
return result
|
|
end
|
|
|
|
# -----
|
|
# Input
|
|
# -----
|
|
# defaults
|
|
x = 0b11111111000000001111111100000000 #0b11101001101101011101101110100101
|
|
n = 32
|
|
# arguments passed
|
|
x = ARGV[0].to_i(2) if ARGV[0] # binary
|
|
n = ARGV[1].to_i if ARGV[1] # integer
|
|
# check arguments
|
|
if ARGV[0] && ARGV[0].size > 32
|
|
puts "We only operate on 32-bit words in SHA-256. Your x is #{ARGV[0].size} bits."; exit
|
|
end
|
|
|
|
# ---------
|
|
# Animation
|
|
# ---------
|
|
s = n.to_s.ljust(2, " ")
|
|
n.times do |i|
|
|
system "clear"
|
|
i += 1
|
|
|
|
puts " x: #{"%032b" % x}"
|
|
puts "ROTR #{s}: #{"%032b" % rotr(i, x)}"
|
|
|
|
sleep 0.10
|
|
end
|
|
sleep 0.5
|
|
|
|
|