From 5f821e510f14f7a38814183e566f52a7d3c174e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcin=20Wo=C5=BAniak?= <y0rune@aol.com>
Date: Thu, 21 Jan 2021 00:07:23 +0100
Subject: [PATCH] Module4 - has been started
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Signed-off-by: Marcin Woźniak <y0rune@aol.com>
---
 module.rb | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/module.rb b/module.rb
index 657cae3..9d88025 100755
--- a/module.rb
+++ b/module.rb
@@ -564,3 +564,71 @@ def algorytmDeSzyfrowania(x,y,u)
   m = (x - 1) / u
   return m
 end
+
+# Module 4
+#################################################################################
+# Zadanie 1
+# Funkcja suma(a,b) wykorzystujac liczby hex
+#################################################################################
+def suma(a,b)
+  binA = a.to_i(16).to_s(2)
+  binB = b.to_i(16).to_s(2)
+
+  if (a =~ /[^01]/).nil?  && (b =~ /[^01]/).nil?
+    return (a.to_i(2) ^ b.to_i(2)).to_s(2)
+  else
+    return (binA.to_i(2) ^ binB.to_i(2)).to_s(16)
+  end
+end
+
+#################################################################################
+# Zadanie 2
+# Funkcja xtime(a) wykorzystujac liczby hex
+#################################################################################
+def xtime(a)
+  binA = a.to_i(16).to_s(2)
+  dl = binA.length
+  while dl != 8
+    binA = "0" + binA
+    dl = dl + 1
+  end
+  if binA[0].to_i == 1
+    binA[0] = ''
+    binA = binA + "0"
+    return (binA.to_i(2) ^ "1B".to_i(16).to_s(2).to_i(2)).to_s(16)
+  elsif binA[0].to_i == 0
+    binA[0] = ''
+    return (binA.to_i(2) << 1 ).to_s(16)
+  end
+end
+
+#################################################################################
+# Zadanie 3
+# Funkcja iloczyn(a,b) wykorzystujac liczby hex
+#################################################################################
+def iloczyn(a,b)
+  solve = ""
+
+  binA = a.to_i(16).to_s(2)
+  dl = binA.length
+  while dl != 8
+    binA = "0" + binA
+    dl = dl + 1
+  end
+
+  len = binA.length - 1
+  binA.split('').each { |a|
+    counter = len - 2
+    tmp = xtime(b)
+    puts counter
+    while counter != 0
+      tmp = xtime(tmp)
+      counter = counter - 1
+    end
+    puts tmp
+    #puts solve
+    solve = suma((a.to_i * tmp.to_i(16)).to_s(16), solve)
+    len = len - 1
+  }
+  return solve
+end