From 0668b315f78fae4b32b2a08cb4571c70613fcef3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=98=D0=BB=D1=8C=D1=8F?= <ilic.zzz@mail.ru>
Date: Sun, 7 Nov 2021 17:56:50 +0300
Subject: [PATCH] Implement Ramzay cipher

---
 lib/Ramzay.rb       | 50 +++++++++++++++++++++++++++++++++++++++++++++
 lib/aaa_crypt.rb    |  2 +-
 test/Ramzay_test.rb | 27 ++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 lib/Ramzay.rb
 create mode 100644 test/Ramzay_test.rb

diff --git a/lib/Ramzay.rb b/lib/Ramzay.rb
new file mode 100644
index 0000000..6bd6e17
--- /dev/null
+++ b/lib/Ramzay.rb
@@ -0,0 +1,50 @@
+class Ramzay
+  def self.encrypt (str)
+    matrix = [['s','i','o','e','r','a','t','n','-','-'],
+              ['c','x','u','d','j','p','z','b','k','q'],
+              ['.','w','f','l','/','g','m','y','h','v']]
+    str = str.gsub(/ /,'/')
+    arr =""
+    str.each_byte do |c|
+      matrix.each_with_index do |row, i|
+        row.each_with_index do |a, j|
+          if c.chr==a
+            if i==0
+              arr<<j.to_s
+            else
+              arr<<(i+7).to_s+j.to_s
+            end
+          end
+        end
+      end
+    end
+    arr
+  end
+
+  def self.decrypt(str)
+    matrix = [['s','i','o','e','r','a','t','n','-','-'],
+              ['c','x','u','d','j','p','z','b','k','q'],
+              ['.','w','f','l','/','g','m','y','h','v']]
+    txt = ""
+    j = 0
+    str.each_byte do |c|
+      d = c.chr.to_i
+      if j==0
+        if d<8
+          txt+=matrix[0][d]
+          j = 0
+        else
+          if d == 8
+            j = 1
+          else
+            j = 2
+          end
+        end
+      else
+        txt+=matrix[j][d]
+        j=0
+      end
+    end
+    txt
+  end
+end
diff --git a/lib/aaa_crypt.rb b/lib/aaa_crypt.rb
index 38c6625..c0472ce 100644
--- a/lib/aaa_crypt.rb
+++ b/lib/aaa_crypt.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require_relative "aaa_crypt/version"
-
+require_relative "Ramzay"
 module AaaCrypt
   class Error < StandardError; end
   # Your code goes here...
diff --git a/test/Ramzay_test.rb b/test/Ramzay_test.rb
new file mode 100644
index 0000000..e7de132
--- /dev/null
+++ b/test/Ramzay_test.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+class Ramzay_Test < Minitest::Test
+  include AaaCrypt
+
+
+  def test_ramzay_encrypt_a
+    assert_equal"5", Ramzay.encrypt('a')
+  end
+
+  def test_ramzay_encrypt_hello_world
+    assert_equal"983939329491249383",
+                Ramzay.encrypt("hello world")
+  end
+
+  def test_ramzay_decrypt_a
+    assert_equal "a", Ramzay.decrypt("5")
+  end
+
+  def test_ramzay_decrypt_hello_world
+    assert_equal"hello/world",
+                Ramzay.decrypt("983939329491249383")
+  end
+
+end