Code cleanup™️
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ad076a8150
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5742d3604c
184
src/main.cpp
184
src/main.cpp
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@ -2,35 +2,15 @@
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#include <boost/asio/post.hpp>
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#include <boost/asio/thread_pool.hpp>
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#include <format>
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#include <iostream>
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#include "xoshiro.hpp"
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#include <thread>
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namespace asio = boost::asio;
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// nvm doesnt work lol :)
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// using asio::experimental::concurrent_channel;
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template <class TRandomAlgo>
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std::string RandomString(std::uint32_t length, TRandomAlgo& rng) {
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std::string s;
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s.resize(length);
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while(true) {
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auto res = rng();
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auto acc = 0u;
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// I love bit hacks!!!
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for(std::size_t i = 0; i < sizeof(res); ++i) {
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std::uint8_t c = (res >> acc);
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if(islower(c)) {
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if(length-- <= 0)
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return s;
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s.push_back(c);
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}
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acc += CHAR_BIT;
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}
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}
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}
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constexpr static auto MAX_CODE_LENGTH = 8;
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constexpr static auto THREAD_COUNT = 26; // this is a-z
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/// This is a constexpr-safe zero-allocation version of the algorithm
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/// the "Scramble" ConsoleScript hash algorithm.
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constexpr std::uint32_t SwsfScramble(std::string_view code) {
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std::uint32_t tally {};
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@ -47,13 +27,26 @@ constexpr std::uint32_t SwsfScramble(std::string_view code) {
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return tally;
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}
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// These is not atomic since no other threads update it
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// there is no real point to making it atomic, other than
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//
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// maybe preventing some false sharing or other perf problem
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// ... but I don't think that matters, lol
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std::uint32_t code_hash = 0x2c73af55;
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std::uint32_t code_length = 8;
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struct FputcIterator {
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using iterator_category = std::output_iterator_tag;
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using value_type = void;
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using difference_type = std::ptrdiff_t;
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using pointer = void;
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using reference = void;
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FputcIterator(std::FILE* file) : file(file) {}
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FputcIterator& operator*() { return *this; }
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FputcIterator& operator++() { return *this; }
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FputcIterator& operator++(int) { return *this; }
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FputcIterator& operator=(const char& val) {
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fputc(val, file);
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return *this;
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}
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private:
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std::FILE* file;
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};
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bool NextCode(std::string& buffer, size_t start) {
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size_t len = buffer.length();
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@ -87,10 +80,15 @@ namespace {
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return "\r" + (m < 0 ? "\33[" + std::to_string(-m) + 'A' : std::string(m, '\n'));
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}
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std::string_view ResetLine() {
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return "\33[2J";
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}
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} // namespace
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struct ThreadDisplayData {
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ThreadDisplayData() { codeString.resize(8); }
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/// This class implements the display of progress
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struct ThreadInfoData {
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ThreadInfoData() { codeString.resize(MAX_CODE_LENGTH); }
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std::uint32_t threadIndex;
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std::string codeString;
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@ -98,104 +96,118 @@ struct ThreadDisplayData {
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bool done = false;
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void DisplayProgress() {
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struct FputcIterator {
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using iterator_category = std::output_iterator_tag;
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using value_type = void;
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using difference_type = std::ptrdiff_t;
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using pointer = void;
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using reference = void;
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FputcIterator(std::FILE* file) : file(file) {}
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FputcIterator& operator*() { return *this; }
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FputcIterator& operator++() { return *this; }
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FputcIterator& operator++(int) { return *this; }
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FputcIterator& operator=(const char& val) {
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fputc(val, file);
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return *this;
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}
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private:
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std::FILE* file;
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};
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if(!done)
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std::format_to(FputcIterator(stdout), "{}Thread {:2}: Trying code {}{} {}({:08x}){}", Line(threadIndex), threadIndex, Color(172),
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codeString, Color(166), codeHash, Reset());
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else {
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std::format_to(FputcIterator(stdout), "{}Thread {:2}: {}Finished!{}", Line(threadIndex), threadIndex, Color(172), Reset());
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std::format_to(FputcIterator(stdout), "{}{}Thread {:2}: {}Finished!{}", Line(threadIndex), ResetLine(), threadIndex, Color(172), Reset());
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}
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std::fflush(stdout);
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}
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};
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std::vector<ThreadDisplayData> data(26);
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std::vector<ThreadInfoData> infoData(THREAD_COUNT);
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struct BruteThreadState {
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BruteThreadState(unsigned tid) : threadIndex(tid) {}
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/// This class actually implements the brunt of the logic
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struct BruteforceWorker {
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void BruteForce(char prefix) {
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// for(std::uint32_t i = 8; i <= code_length; ++i) {
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test_buffer.resize(code_length, 'a');
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/// Options for the worker.
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struct Options {
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/// The target hash to find matches for.
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std::uint32_t targetHash;
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/// If `startLength` should be treated as the code length.
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bool exact;
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std::uint32_t startLength;
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std::uint32_t endLength;
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};
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constexpr BruteforceWorker(unsigned tid, const Options& options) : options(options), threadIndex(tid) {}
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/// Public-facing driver function - the thread pool runs this.
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void Bruteforce(char prefix) {
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if(options.exact) {
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BruteforceForLength(prefix, options.startLength);
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} else {
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for(std::uint32_t i = options.startLength; i <= options.endLength; ++i)
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BruteforceForLength(prefix, i);
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}
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DisplayData().done = true;
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}
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private:
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void BruteforceForLength(char prefix, std::uint32_t length) {
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DisplayData().codeString.resize(length);
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test_buffer.resize(length, 'a');
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test_buffer[0] = prefix;
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// test all possible combinations
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while(true) {
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// std::string test_buffer = RandomString(code_length, rng);
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hash = SwsfScramble(test_buffer);
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if(hash == code_hash) {
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std::cerr << std::format("match: {} ({:08x})\n", test_buffer, hash);
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}
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memcpy(data[threadIndex].codeString.data(), test_buffer.data(), test_buffer.length());
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data[threadIndex].codeHash = hash;
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// There was a match!
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if(hash == options.targetHash)
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std::format_to(FputcIterator(stderr), "match: {} ({:08x})\n", test_buffer, hash);
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// DisplayProgress(test_buffer, hash);
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CopyDisplayData();
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if(!NextCode(test_buffer, 1))
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break;
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}
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//}
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data[threadIndex].done = true;
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}
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std::string test_buffer;
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std::uint32_t hash;
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void CopyDisplayData() {
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memcpy(DisplayData().codeString.data(), test_buffer.data(), test_buffer.length());
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DisplayData().codeHash = hash;
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}
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constexpr ThreadInfoData& DisplayData() { return infoData[threadIndex]; }
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Options options;
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unsigned threadIndex;
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std::random_device rd;
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// swbf::Xoshiro256ss rng{rd};
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std::string test_buffer;
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std::uint32_t hash;
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};
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int main() {
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asio::io_context ioc;
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asio::thread_pool pool(27);
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asio::thread_pool pool(THREAD_COUNT);
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auto threadIndex = 0u;
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BruteforceWorker::Options options {
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.targetHash = 0x2c73af55,
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.exact = true,
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.startLength = 8
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};
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// post worker threads to run onto the thread pool & wait for them to complete
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for(int i = 0; i < 26; ++i)
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asio::post(pool, [&, i, tid = threadIndex++]() {
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BruteThreadState state(tid);
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data[tid].threadIndex = tid;
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state.BruteForce('a' + i);
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for(int i = 0; i < THREAD_COUNT; ++i)
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asio::post(pool, [&, tid = threadIndex++]() {
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BruteforceWorker state(tid, options);
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infoData[tid].threadIndex = tid;
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state.Bruteforce('a' + tid);
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});
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bool done = false;
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while(!done) {
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int doneIndex = 0;
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for(auto& d : data) {
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for(auto& d : infoData) {
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if(d.done)
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doneIndex++;
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doneIndex++;
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d.DisplayProgress();
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}
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if(doneIndex == 26) {
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if(doneIndex == THREAD_COUNT)
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done = true;
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}
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std::this_thread::sleep_for(std::chrono::milliseconds(66));
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}
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pool.join(); // just in case!
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@ -1,85 +0,0 @@
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#include <cstddef>
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#include <cstdint>
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#include <climits> // CHAR_BIT
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#include <random>
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namespace swbf {
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namespace detail {
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template <class T>
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constexpr size_t BitSizeOf() {
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return sizeof(T) * CHAR_BIT;
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}
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constexpr std::uint64_t splitmix64(std::uint64_t x) {
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std::uint64_t z = (x += 0x9e3779b97f4a7c15uLL);
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z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9uLL;
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z = (z ^ (z >> 27)) * 0x94d049bb133111ebuLL;
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return z ^ (z >> 31);
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}
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constexpr std::uint64_t rotl(std::uint64_t x, int k) {
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return (x << k) | (x >> (BitSizeOf<std::uint64_t>() - k));
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}
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/**
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* Xoshiro256** as a C++ RandomNumberEngine,
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* which can be used in C++ random algorithms.
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*/
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struct Xoshiro256ss {
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using result_type = std::uint64_t;
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std::uint64_t s[4] {};
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constexpr explicit Xoshiro256ss() : Xoshiro256ss(0) {}
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constexpr explicit Xoshiro256ss(std::uint64_t seed) {
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s[0] = splitmix64(seed);
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s[1] = splitmix64(seed);
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s[2] = splitmix64(seed);
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s[3] = splitmix64(seed);
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}
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/**
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* Constructor for seeding from a `std::random_device`.
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*
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* \param[in] rd Random device to seed this engine with.
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*/
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constexpr explicit Xoshiro256ss(std::random_device& rd) {
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// Get 64 bits out of the random device.
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//
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// This lambda is quite literal, as it fetches
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// 2 iterations of the random engine, and
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// shifts + OR's them into a 64bit value.
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auto get_u64 = [&rd] {
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std::uint64_t the_thing = rd();
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return (the_thing << 32) | rd();
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};
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// seed with 256 bits of entropy from the random device + splitmix64
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// to ensure we seed it well, as per recommendation.
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s[0] = splitmix64(get_u64());
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s[1] = splitmix64(get_u64());
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s[2] = splitmix64(get_u64());
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s[3] = splitmix64(get_u64());
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}
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static constexpr result_type min() { return 0; }
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static constexpr result_type max() { return std::uint64_t(-1); }
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constexpr result_type operator()() {
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result_type result = rotl(s[1] * 5, 7) * 9;
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result_type t = s[1] << 17;
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s[2] ^= s[0];
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s[3] ^= s[1];
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s[1] ^= s[2];
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s[0] ^= s[3];
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s[2] ^= t;
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s[3] = rotl(s[3], 45);
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return result;
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}
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};
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} // namespace detail
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using detail::Xoshiro256ss;
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} // namespace swbf
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