2020-12-12 01:16:55 +01:00
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#!/usr/bin/ruby
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# coding: utf-8
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###################################
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#
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# Marcin Woźniak
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# s434812
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#
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###################################
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load '../module.rb'
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2020-12-19 22:24:14 +01:00
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load '../module2.rb'
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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puts `clear`
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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def wielokrotnoscPunktu2(a,b,p,n,x,y)
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counter = n - 1
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punktQ = []
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punktP = [x,y]
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temp = [x,y]
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while counter > 0
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punktQ = sumaPunktow(a,b,p,temp[0],temp[1],punktP[0],punktP[1])
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temp = punktQ
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counter = counter - 1
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end
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return punktQ
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end
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def wielokrotnoscPunktu(a,b,p,n,x,y)
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punktQ = [x,y]
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punktR = ["e","e"]
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while n > 0
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if n % 2 == 1
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punktR = sumaPunktow(a,b,p,punktR[0],punktR[1],punktQ[0],punktQ[1])
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n = n - 1
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end
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punktQ = sumaPunktow(a,b,p,punktQ[0],punktQ[1],punktQ[0],punktQ[1])
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n = n / 2
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end
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return punktR
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end
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def liczenieOrd(a,b,p)
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threads = []
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punktyNaKrzywej = Array.new
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unikalnePunktyNaKrzywej = Array.new
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threads << Thread.new {
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counter = 10
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while counter > 0
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punktyNaKrzywej << punktNaKrzywej(a,b,p)[0]
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counter = counter -1
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end
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}
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threads << Thread.new {
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counter = 10
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while counter > 0
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punktyNaKrzywej << punktNaKrzywej(a,b,p)[0]
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counter = counter -1
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end
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}
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threads << Thread.new {
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counter = 10
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while counter > 0
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punktyNaKrzywej << punktNaKrzywej(a,b,p)[0]
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counter = counter -1
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end
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}
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ThreadsWait.all_waits(*threads)
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punktyNaKrzywej.sort.each { |e|
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unikalnePunktyNaKrzywej.push(e) if e != unikalnePunktyNaKrzywej[-1]
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}
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return unikalnePunktyNaKrzywej.count
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end
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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def generowanieKluczyElGamalKrzywaEliptyczna(k)
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while true
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p = generate(k)
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if (primalityTest(p)) && (p % 4 == 3)
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krzywa = generatorKrzywej(p)
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a = krzywa[0].to_i
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b = krzywa[1].to_i
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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punktyNaKrzywej = Array.new
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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punktP = punktNaKrzywej(a,b,p)
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ord = liczenieOrd(a,b,p)
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2020-12-12 01:16:55 +01:00
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2020-12-19 22:24:14 +01:00
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while true
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x = SecureRandom.random_number(1..ord)
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if x < ord
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punktQ = wielokrotnoscPunktu(a,b,p,x,punktP[0],punktP[1])
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pubKey = [a,b,p,punktP[0],punktP[1],punktQ[0],punktQ[1]]
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privKey = [a,b,p,punktP[0],punktP[1],punktQ[0],punktQ[1],x]
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return a,b,p,punktP[0],punktP[1],punktQ[0],punktQ[1],x
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end
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end
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end
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2020-12-12 01:16:55 +01:00
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end
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end
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2020-12-19 22:24:14 +01:00
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def algorytmKodowania(a,b,p,m,n,u)
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if (m < n) && (p > n*u)
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for i in 1..u
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x = (m * u % p) + (i % p)
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fx = rownanieKrzywej(a,b,p,x)
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if remSqEuler(fx,p)
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y = betterExponentiation(fx,((p+1)/4),p)
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end
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end
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else
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puts "Nieprawidołowe dane"
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end
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return [x,y]
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end
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def algorytmDeKodowania(a,b,p,x,y,n,u)
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m = (x - 1) / u
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return m
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end
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def szyfrowanieElGamala(m,n,u,a,b,p,px,py,qx,qy)
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c = algorytmKodowania(a,b,p,m,n,u)
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puts "Wiadomość na prostej jako punkt #{c.inspect}"
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return c
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end
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def main
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k = 30
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m = 73
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n = m + SecureRandom.random_number(0..1000000)
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u = SecureRandom.random_number(30..50)
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a,b,p,px,py,qx,qy,x = generowanieKluczyElGamalKrzywaEliptyczna(k)
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pubKey = [a,b,p,px,py,qx,qy]
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privKey = [a,b,p,px,py,qx,qy,x]
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pm = szyfrowanieElGamala(m,n,u,a,b,p,px,py,qx,qy)
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# BOB
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y = SecureRandom.random_number(0..liczenieOrd(a,b,p))
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c1 = wielokrotnoscPunktu(a,b,p,y,px,py)
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yq = wielokrotnoscPunktu(a,b,p,y,qx,qy)
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c2 = sumaPunktow(a,b,p,pm[0],pm[1],yq[0],yq[1])
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puts "Ciphers: #{c1} + #{c2}"
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# ALICE
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xc1 = wielokrotnoscPunktu(a,b,p,x,c1[0],c1[1])
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pmd = sumaPunktow(a,b,p,c2[0],c2[1],xc1[0],-xc1[1])
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d = algorytmDeKodowania(a,b,p,pmd[0],pmd[1],n,u)
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puts "Dekodowana wiadomość #{d.inspect}"
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end
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#puts generowanieKluczyElGamalKrzywaEliptyczna(2048).inspect
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#puts wielokrotnoscPunktu(8,10,19,3,15,3).inspect
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#puts algorytmSzyfrowania(8,10,19,29102901920190,29102901920199,50).inspect
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#puts algorytmDeSzyfrowania(8,10,19,12,17,50)
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puts main.inspect
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