From 523529ae97e33283c8c06ed8c2af2a9a79f734ca Mon Sep 17 00:00:00 2001 From: Leonetienne Date: Sun, 5 Dec 2021 15:47:31 +0100 Subject: [PATCH] Got a protoprotoprototype working --- .gitignore | 358 ++++++++++++++++++++++++++++++++++++++++ Feistel.vcxproj | 147 +++++++++++++++++ Feistel.vcxproj.filters | 22 +++ main.cpp | 117 +++++++++++++ 4 files changed, 644 insertions(+) create mode 100644 .gitignore create mode 100644 Feistel.vcxproj create mode 100644 Feistel.vcxproj.filters create mode 100644 main.cpp diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..45584dc --- /dev/null +++ b/.gitignore @@ -0,0 +1,358 @@ +## Ignore Visual Studio temporary files, build results, and +## files generated by popular Visual Studio add-ons. +## +## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore + +#infilename-tag +*_gitignore_* + +# User-specific files +*.rsuser +*.suo +*.user +*.userosscache +*.sln.docstates + +# User-specific files (MonoDevelop/Xamarin Studio) +*.userprefs + +# Mono auto generated files +mono_crash.* + +# Visual Paradigm Shitfiles +*tornado.vpp.bak* +*tornado.*lck* + +# Build results +[Dd]ebug/ +[Dd]ebugPublic/ +[Rr]elease/ +[Rr]eleases/ +x64/ +x86/ +[Aa][Rr][Mm]/ +[Aa][Rr][Mm]64/ +bld/ +[Bb]in/ +[Oo]bj/ +[Ll]og/ +[Ll]ogs/ + +# Visual Studio 2015/2017 cache/options directory +.vs/ +# Uncomment if you have tasks that create the project's static files in wwwroot +#wwwroot/ + +# Visual Studio 2017 auto generated files +Generated\ Files/ + +# MSTest test Results +[Tt]est[Rr]esult*/ +[Bb]uild[Ll]og.* + +# NUnit +*.VisualState.xml +TestResult.xml +nunit-*.xml + +# Build Results of an ATL Project +[Dd]ebugPS/ +[Rr]eleasePS/ +dlldata.c + +# Benchmark Results +BenchmarkDotNet.Artifacts/ + +# .NET Core +project.lock.json +project.fragment.lock.json +artifacts/ + +# StyleCop +StyleCopReport.xml + +# Files built by Visual Studio +*_i.c +*_p.c +*_h.h +*.ilk +*.meta +*.obj +*.iobj +*.pch +*.pdb +*.ipdb +*.pgc +*.pgd +*.rsp +*.sbr +*.tlb +*.tli +*.tlh +*.tmp +*.tmp_proj +*_wpftmp.csproj +*.log +*.vspscc +*.vssscc +.builds +*.pidb +*.svclog +*.scc + +# Chutzpah Test files +_Chutzpah* + +# Visual C++ cache files +ipch/ +*.aps +*.ncb +*.opendb +*.opensdf +*.sdf +*.cachefile +*.VC.db +*.VC.VC.opendb + +# Visual Studio profiler +*.psess +*.vsp +*.vspx +*.sap + +# Visual Studio Trace Files +*.e2e + +# TFS 2012 Local Workspace +$tf/ + +# Guidance Automation Toolkit +*.gpState + +# ReSharper is a .NET coding add-in +_ReSharper*/ +*.[Rr]e[Ss]harper +*.DotSettings.user + +# TeamCity is a build add-in +_TeamCity* + +# DotCover is a Code Coverage Tool +*.dotCover + +# AxoCover is a Code Coverage Tool +.axoCover/* +!.axoCover/settings.json + +# Visual Studio code coverage results +*.coverage +*.coveragexml + +# NCrunch +_NCrunch_* +.*crunch*.local.xml +nCrunchTemp_* + +# MightyMoose +*.mm.* +AutoTest.Net/ + +# Web workbench (sass) +.sass-cache/ + +# Installshield output folder +[Ee]xpress/ + +# DocProject is a documentation generator add-in +DocProject/buildhelp/ +DocProject/Help/*.HxT +DocProject/Help/*.HxC +DocProject/Help/*.hhc +DocProject/Help/*.hhk +DocProject/Help/*.hhp +DocProject/Help/Html2 +DocProject/Help/html + +# Click-Once directory +publish/ + +# Publish Web Output +*.[Pp]ublish.xml +*.azurePubxml +# Note: Comment the next line if you want to checkin your web deploy settings, +# but database connection strings (with potential passwords) will be unencrypted +*.pubxml +*.publishproj + +# Microsoft Azure Web App publish settings. Comment the next line if you want to +# checkin your Azure Web App publish settings, but sensitive information contained +# in these scripts will be unencrypted +PublishScripts/ + +# NuGet Packages +*.nupkg +# NuGet Symbol Packages +*.snupkg +# The packages folder can be ignored because of Package Restore +**/[Pp]ackages/* +# except build/, which is used as an MSBuild target. +!**/[Pp]ackages/build/ +# Uncomment if necessary however generally it will be regenerated when needed +#!**/[Pp]ackages/repositories.config +# NuGet v3's project.json files produces more ignorable files +*.nuget.props +*.nuget.targets + +# Microsoft Azure Build Output +csx/ +*.build.csdef + +# Microsoft Azure Emulator +ecf/ +rcf/ + +# Windows Store app package directories and files +AppPackages/ +BundleArtifacts/ +Package.StoreAssociation.xml +_pkginfo.txt +*.appx +*.appxbundle +*.appxupload + +# Visual Studio cache files +# files ending in .cache can be ignored +*.[Cc]ache +# but keep track of directories ending in .cache +!?*.[Cc]ache/ + +# Others +ClientBin/ +~$* +*~ +*.dbmdl +*.dbproj.schemaview +*.jfm +*.pfx +*.publishsettings +orleans.codegen.cs + +# Including strong name files can present a security risk +# (https://github.com/github/gitignore/pull/2483#issue-259490424) +#*.snk + +# Since there are multiple workflows, uncomment next line to ignore bower_components +# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) +#bower_components/ + +# RIA/Silverlight projects +Generated_Code/ + +# Backup & report files from converting an old project file +# to a newer Visual Studio version. Backup files are not needed, +# because we have git ;-) +_UpgradeReport_Files/ +Backup*/ +UpgradeLog*.XML +UpgradeLog*.htm +ServiceFabricBackup/ +*.rptproj.bak + +# SQL Server files +*.mdf +*.ldf +*.ndf + +# Business Intelligence projects +*.rdl.data +*.bim.layout +*.bim_*.settings +*.rptproj.rsuser +*- [Bb]ackup.rdl +*- [Bb]ackup ([0-9]).rdl +*- [Bb]ackup ([0-9][0-9]).rdl + +# Microsoft Fakes +FakesAssemblies/ + +# GhostDoc plugin setting file +*.GhostDoc.xml + +# Node.js Tools for Visual Studio +.ntvs_analysis.dat +node_modules/ + +# Visual Studio 6 build log +*.plg + +# Visual Studio 6 workspace options file +*.opt + +# Visual Studio 6 auto-generated workspace file (contains which files were open etc.) +*.vbw + +# Visual Studio LightSwitch build output +**/*.HTMLClient/GeneratedArtifacts +**/*.DesktopClient/GeneratedArtifacts +**/*.DesktopClient/ModelManifest.xml +**/*.Server/GeneratedArtifacts +**/*.Server/ModelManifest.xml +_Pvt_Extensions + +# Paket dependency manager +.paket/paket.exe +paket-files/ + +# FAKE - F# Make +.fake/ + +# CodeRush personal settings +.cr/personal + +# Python Tools for Visual Studio (PTVS) +__pycache__/ +*.pyc + +# Cake - Uncomment if you are using it +# tools/** +# !tools/packages.config + +# Tabs Studio +*.tss + +# Telerik's JustMock configuration file +*.jmconfig + +# BizTalk build output +*.btp.cs +*.btm.cs +*.odx.cs +*.xsd.cs + +# OpenCover UI analysis results +OpenCover/ + +# Azure Stream Analytics local run output +ASALocalRun/ + +# MSBuild Binary and Structured Log +*.binlog + +# NVidia Nsight GPU debugger configuration file +*.nvuser + +# MFractors (Xamarin productivity tool) working folder +.mfractor/ + +# Local History for Visual Studio +.localhistory/ + +# BeatPulse healthcheck temp database +healthchecksdb + +# Backup folder for Package Reference Convert tool in Visual Studio 2017 +MigrationBackup/ + +# Ionide (cross platform F# VS Code tools) working folder +.ionide/ + diff --git a/Feistel.vcxproj b/Feistel.vcxproj new file mode 100644 index 0000000..ddc1d1a --- /dev/null +++ b/Feistel.vcxproj @@ -0,0 +1,147 @@ + + + + + Debug + Win32 + + + Release + Win32 + + + Debug + x64 + + + Release + x64 + + + + 16.0 + Win32Proj + {2b2cf665-f5e6-44db-961f-fc81c88a356d} + Feistel + 10.0 + + + + Application + true + v142 + Unicode + + + Application + false + v142 + true + Unicode + + + Application + true + v142 + Unicode + + + Application + false + v142 + true + Unicode + + + + + + + + + + + + + + + + + + + + + true + + + false + + + true + + + false + + + + Level3 + true + WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) + true + + + Console + true + + + + + Level3 + true + true + true + WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + true + + + Console + true + true + true + + + + + Level3 + true + _DEBUG;_CONSOLE;%(PreprocessorDefinitions) + true + + + Console + true + + + + + Level3 + true + true + true + NDEBUG;_CONSOLE;%(PreprocessorDefinitions) + true + + + Console + true + true + true + + + + + + + + + \ No newline at end of file diff --git a/Feistel.vcxproj.filters b/Feistel.vcxproj.filters new file mode 100644 index 0000000..46d313e --- /dev/null +++ b/Feistel.vcxproj.filters @@ -0,0 +1,22 @@ + + + + + {4FC737F1-C7A5-4376-A066-2A32D752A2FF} + cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx + + + {93995380-89BD-4b04-88EB-625FBE52EBFB} + h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd + + + {67DA6AB6-F800-4c08-8B7A-83BB121AAD01} + rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms + + + + + Quelldateien + + + \ No newline at end of file diff --git a/main.cpp b/main.cpp new file mode 100644 index 0000000..cc8567b --- /dev/null +++ b/main.cpp @@ -0,0 +1,117 @@ +#include +#include +#include + +#define BLOCK_SIZE 8 +#define N_ROUNDS 8 + +std::string F(std::string m, const std::string& key); +std::string Xor(const std::string& a, const std::string& b); +std::string Shiftl(const std::string& s, std::size_t amount); +std::string Shiftr(const std::string& s, std::size_t amount); +std::pair Feistel(std::string l, std::string r, const std::array& keys, bool reverseKeyOrder = false); + +int Mod(int numerator, int denominator) +{ + return (denominator + (numerator % denominator)) % denominator; +} + +int main() +{ + std::string l = "10101010"; + std::string r = "10101010"; + const std::array keys = { + "11101101", + "01110101", + "10111101", + "00010110", + "00000011", + "10110011", + "11011101", + "00111101" + }; + + std::cout << "Input: " << l << r << std::endl; + + auto c = Feistel(l, r, keys); + l = c.first; + r = c.second; + + std::cout << "Ciphertext: " << l << r << std::endl; + + c = Feistel(l, r, keys, true); + l = c.first; + r = c.second; + + std::cout << "Decrypted: " << l << r << std::endl; + + return 0; +} + +std::pair Feistel(std::string l, std::string r, const std::array& keys, bool reverseKeyOrder) +{ + std::string tmp; + + for (std::size_t i = 0; i < N_ROUNDS; i++) + { + // Calculate key index + std::size_t keyIndex; + if (reverseKeyOrder) + keyIndex = N_ROUNDS - i - 1; + else + keyIndex = i; + + // Do a feistel round + tmp = r; + r = Xor(l, F(r, keys[keyIndex])); + l = tmp; + } + + return std::make_pair(r, l); +} + +std::string F(std::string m, const std::string& key) +{ + // Made-up F function + + // Shift 5 to the left + m = Shiftl(m, 5); + + // Xor with key + return Xor(m, key); +} + +std::string Shiftl(const std::string& s, std::size_t amount) +{ + std::stringstream ss; + + for (std::size_t i = 0; i < s.size(); i++) + ss << s[Mod((i + amount), s.size())]; + + return ss.str(); +} + +std::string Shiftr(const std::string& s, std::size_t amount) +{ + std::stringstream ss; + + for (std::size_t i = 0; i < s.size(); i++) + ss << s[Mod((i - amount), s.size())]; + + return ss.str(); +} + +std::string Xor(const std::string& a, const std::string& b) +{ + std::stringstream ss; + + for (std::size_t i = 0; i < BLOCK_SIZE; i++) + { + if (a[i] xor b[i]) + ss << '1'; + else + ss << '0'; + } + + return ss.str(); +}