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