Tidied up example/static test executables

GCryptLib/exec/visualize-extreme-input-diffusion.cpp

@@ -0,0 +1,54 @@
+#include <iostream>
+#include <GCrypt/GWrapper.h>
+#include <GCrypt/Key.h>
+#include <GCrypt/Util.h>
+#include <BmpPP/Bmp.h>
+#include "Visualize.h"
+
+const std::string execName = "visualize-extreme-input-diffusion";
+
+using namespace Leonetienne::GCrypt;
+using namespace Leonetienne::BmpPP;
+using namespace Leonetienne::Eule;
+
+int main() {
+  // These are magic values, which work for this specific input string.
+  // If you want to try another string, get the size of all blocks in bits (it gets printed),
+  // and find two integer factors which factor up to it. These are your images width, and height.
+  const Vector2i visualizationDimension = Vector2i(56, 64);
+
+
+  // Create a key
+  // The key is almost just zeores (it doesn't have an IV, so what you see is what goes in the cipher.)
+  // In case you're wondering, I can tell you right now that an all-zero input with an all-zero key will result in an all-zero ciphertext.
+  Key key;
+  key.Reset();
+  key.SetBit(199, true);
+  VisualizeBlock(key, execName+"-key.bmp");
+
+  // Create our input blocks
+  // All the input blocks are just zeroes!
+  std::vector<Block> input_blocks;
+  input_blocks.resize(7);
+  for (Block& block : input_blocks) {
+    block.Reset();
+  }
+
+  std::cout << "Input size is " << input_blocks.size() * Block::BLOCK_SIZE_BITS << " bits long." << std::endl;
+  VisualizeBlocks(input_blocks, visualizationDimension, execName+"-input.bmp");
+
+  // Encrypt it
+  std::vector<Block> ciphertext_blocks = GWrapper::CipherBlocks(input_blocks, key, GCipher::DIRECTION::ENCIPHER);
+  VisualizeBlocks(ciphertext_blocks, visualizationDimension, execName+"-output.bmp");
+
+  // Now flip a single bit in the input
+  input_blocks[3].FlipBit(156);
+  VisualizeBlocks(input_blocks, visualizationDimension, execName+"-input-flip.bmp");
+
+  // Encrypt it again
+  ciphertext_blocks = GWrapper::CipherBlocks(input_blocks, key, GCipher::DIRECTION::ENCIPHER);
+  VisualizeBlocks(ciphertext_blocks, visualizationDimension, execName+"-output-flip.bmp");
+
+  return 0;
+}
+