correct bugs in mixcolumnNode + add tests

cryptodag.rb

@@ -59,6 +59,10 @@ class CryptoOperator
 
 
   protected def check_inputs(values)
+    # puts "###"
+    # p @inputs
+    # p values
+    # puts "==="
     raise "CryptoOperator.check_inputs: values do not match (#{@values.length} should be #{@inputs.length})" unless values.length == @inputs.length
     # TODO(all) check domains
   end

nodes/mixcolumn.rb

@@ -7,9 +7,14 @@ class MixColumnNode < CryptoDagNode
   def initialize(name:, input:, m:)
     output = DTable.new("#{name}", input.type, input.dimensions)
     @m = m
-    operators = [
-      MixColumnsOperator.new(input, output, m),
-    ]
+    operators = []
+    input.dimensions[1].times do |x|
+      operators.push(MixColumnsOperator.new(
+        input.dimensions[0].times.map{|y| input[y][x]},
+        output.dimensions[0].times.map{|y| output[y][x]},
+        m
+      ))
+    end
     super(inputs: [input], outputs: [output], operators: operators, name: name)
   end
 end

tests/nodes/exec_mc.rb

+#!/usr/bin/ruby
+## test XorNode
+
+require_relative "../../nodes/input.rb"
+require_relative "../../nodes/mixcolumn.rb"
+require_relative "../../simulate_cryptodag.rb"
+
+require "minitest/autorun"
+require "pry"
+
+
+class TestExecSNode < Minitest::Unit::TestCase
+    def test_simple22s()
+        a_node = InputNode.new(name:"input_a",dimensions:[4,4])
+        mc_node = MixColumnNode.new(name:"mc", input:a_node.outputs[0], m:[
+            [2,3,1,1],
+            [1,2,3,1],
+            [1,1,2,3],
+            [3,1,1,2],
+        ]) # AES mix columns
+        computed_outputs = compute_set_of_operators(
+            [
+                0,  1,  219 ,242,
+                0,  1,  19  ,10,
+                0,  1,  83  ,34,
+                0,  1,  69  ,92
+            ].flatten, # input values
+            a_node.flatten_output(0), # input variables
+            mc_node.flatten_output(0), # output variables
+            mc_node.operators
+        )
+        assert_equal(computed_outputs, [
+            0,  1,  142 ,159,
+            0,  1,  77  ,220,
+            0,  1,  161 ,88,
+            0,  1,  188 ,157,
+        ].flatten)
+    end
+
+end
\ No newline at end of file

tests/nodes/exec_s.rb

@@ -9,7 +9,7 @@ require "minitest/autorun"
 require "pry"
 
 
-class TestExecXorNode < Minitest::Unit::TestCase
+class TestExecSNode < Minitest::Unit::TestCase
     def test_simple22s()
         subtable_1 = 256.times.map{|i|(i*2) % 256}.to_a
         subtable_2 = 256.times.map{|i|(i+1) % 256}.to_a