From bc24abfb6fd523d4e5ecf8529d8ee625eefa8ae5 Mon Sep 17 00:00:00 2001
From: "Z. Cliffe Schreuders" <code.cliffe@schreuders.org>
Date: Wed, 26 Jun 2024 13:19:11 +0100
Subject: [PATCH] remove bitwise_xor fixes #158

---
 .../cipher/bitwise_xor/bitwise_xor.pp         |  0
 .../cipher/bitwise_xor/manifests/.no_puppet   |  0
 .../cipher/bitwise_xor/secgen_local/local.rb  | 45 -----------------
 .../cipher/bitwise_xor/secgen_metadata.xml    | 48 -------------------
 4 files changed, 93 deletions(-)
 delete mode 100644 modules/encoders/cipher/bitwise_xor/bitwise_xor.pp
 delete mode 100644 modules/encoders/cipher/bitwise_xor/manifests/.no_puppet
 delete mode 100644 modules/encoders/cipher/bitwise_xor/secgen_local/local.rb
 delete mode 100644 modules/encoders/cipher/bitwise_xor/secgen_metadata.xml

diff --git a/modules/encoders/cipher/bitwise_xor/bitwise_xor.pp b/modules/encoders/cipher/bitwise_xor/bitwise_xor.pp
deleted file mode 100644
index e69de29bb..000000000
diff --git a/modules/encoders/cipher/bitwise_xor/manifests/.no_puppet b/modules/encoders/cipher/bitwise_xor/manifests/.no_puppet
deleted file mode 100644
index e69de29bb..000000000
diff --git a/modules/encoders/cipher/bitwise_xor/secgen_local/local.rb b/modules/encoders/cipher/bitwise_xor/secgen_local/local.rb
deleted file mode 100644
index f9415a8ac..000000000
--- a/modules/encoders/cipher/bitwise_xor/secgen_local/local.rb
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/usr/bin/ruby
-# Inputs:       An ASCII string to mask
-# Outputs:      2 bit stream strings which, when XOR'd together, result in the input string.
-# Description:  Input string is converted into a bit stream (String A)
-#               Random equivalent length bit stream is generated (String B)
-#               Strings A and B are XOR'd together to give us a third (String C)
-#               Strings B and C are returned.
-
-require_relative '../../../../../lib/objects/local_string_encoder.rb'
-class BitwiseXORChallengeGenerator < StringEncoder
-
-  def initialize
-    super
-    self.module_name = 'Bitwise XOR Challenge Generator'
-  end
-
-  def encode(str)
-    number_of_bytes = str.length
-
-    # String A: Convert input that we're hiding into binary
-    binary_string_to_mask = str.unpack('B*')[0]
-
-    # String B: Generate bitstream
-    generated_bit_stream = []
-    number_of_bytes.times do
-      generated_bit_stream << (1..8).map { [0, 1].sample }.join
-    end
-    generated_bit_stream = generated_bit_stream.join
-
-    # bitwise xor
-    decimal_result = binary_string_to_mask.to_i(2) ^ generated_bit_stream.to_i(2)
-
-    # Turn decimal result back into a string of bits
-    binary_string_c = decimal_result.to_s(2)
-
-    # prepend leading 0's to the result
-    result = binary_string_c.to_s.rjust(number_of_bytes * 8, '0')
-
-    # join the binary strings with an underscore
-    self.outputs << "#{generated_bit_stream}_#{result}"
-  end
-
-end
-
-BitwiseXORChallengeGenerator.new.run
\ No newline at end of file
diff --git a/modules/encoders/cipher/bitwise_xor/secgen_metadata.xml b/modules/encoders/cipher/bitwise_xor/secgen_metadata.xml
deleted file mode 100644
index e2d379836..000000000
--- a/modules/encoders/cipher/bitwise_xor/secgen_metadata.xml
+++ /dev/null
@@ -1,48 +0,0 @@
-<?xml version="1.0"?>
-
-<encoder xmlns="http://www.github/cliffe/SecGen/encoder"
-           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-           xsi:schemaLocation="http://www.github/cliffe/SecGen/encoder">
-  <name>Bitwise XOR Challenge encoder</name>
-  <author>Thomas Shaw</author>
-  <module_license>MIT</module_license>
-  <description>Binary bitwise XOR operation module. Takes a string input, generates a random bitstream of equal length.,
-    XOR's the 2 strings, outputs the binary streams joined with an underscore.
-  </description>
-
-  <type>ctf_challenge</type>
-  <type>ascii_reversible</type>
-  <type>string_encoder</type>
-  <type>local_calculation</type>
-  <platform>linux</platform>
-  <platform>windows</platform>
-  <difficulty>high</difficulty>
-
-  <hint>Perform a bitwise XOR on both strings - https://www.youtube.com/watch?v=YtghBxoBxpA</hint>
-  <solution>Example bitwise XOR tool:
-    http://www.mobilefish.com/services/big_number_bitwise_calculation/big_number_bitwise_calculation.php
-    Decode the result into it's ASCII representation.
-  </solution>
-
-  <read_fact>strings_to_encode</read_fact>
-
-  <default_input into="strings_to_encode">
-    <generator type="flag_generator"/>
-  </default_input>
-
-  <output_type>generated_strings</output_type>
-
-  <!-- TODO FIXME: Issue #158: Stack level too deep -->
-  <!-- In the meantime conflicts with everything to avoid being selected -->
-  <conflict>
-    <module_path>.*</module_path>
-  </conflict>
-
-  <CyBOK KA="F" topic="Artifact Analysis">
-    <keyword>Encoding and alternative data formats</keyword>
-  </CyBOK>
-  <CyBOK KA="C" topic="Symmetric Cryptography">
-    <keyword>symmetric encryption and authentication</keyword>
-  </CyBOK>
-
-</encoder>