commit d2e130a4ad26d0881be1cc77b4d2bcfc2500bcef
Author: Avril <flanchan@cumallover.me>
Date:   Sun May 24 20:10:06 2020 +0100

    uhh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fa58426
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*~
+sfexec
+bin/
+obj/
+sha256_literal/
diff --git a/generator-native/Cargo.toml b/generator-native/Cargo.toml
new file mode 100644
index 0000000..72c05fd
--- /dev/null
+++ b/generator-native/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "generator-native"
+version = "0.1.0"
+authors = ["Avril <flanchan@cumallover.me>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/generator-native/src/main.rs b/generator-native/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/generator-native/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/generator/Program.cs b/generator/Program.cs
new file mode 100644
index 0000000..735852c
--- /dev/null
+++ b/generator/Program.cs
@@ -0,0 +1,162 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace generator
+{
+    [Flags]
+    enum Mode
+    {
+	None = 0,
+	Silent = 1<<0,
+	Execute = 1<<1,
+    }
+    class Program
+    {
+	static string execstr=null;
+	static string output = "file.h";
+	static string[] files = null;
+	static Mode ParseArgs(Taker<string> args)
+	{
+	    List<string> f = new List<string>();
+	    Mode mode = Mode.None;
+
+	    bool look=true;
+	    while(args.TryTake(out var arg0))
+	    {
+		switch(arg0)
+		{
+		    case "-s" when look:
+			mode |= Mode.Silent;
+			break;
+		    case "-e" when look:
+			mode |= Mode.Execute;
+			if(args.TryTake(out var exec))
+			    execstr = exec;
+			else
+			    throw new InvalidOperationException("-e must be given a string");
+			break;
+		    case "-o" when look:
+			if(!args.TryTake(out output))
+			    throw new InvalidOperationException("-o must be given an output");
+			break;
+		    case "-" when look:
+			look =false;
+			break;
+		    default:
+			f.Add(arg0);
+			break;
+		}
+	    }
+	    files = f.ToArray();
+	    return mode;
+	}
+        static void Main(string[] args)
+        {
+            Mode mode;
+	    try {
+		mode = ParseArgs(new Taker<string>(args));
+	    } catch(Exception e)
+	    {
+		Console.WriteLine("Error: "+e.Message);
+		return;
+	    }
+
+	    if(files.Length<1)
+	    {
+		Console.WriteLine("Usage: generator [-e <exec str>] [-s] [-] <files...>");
+		return;
+	    }
+	    Console.WriteLine("Writing to "+output+"...");
+	    using(var fs = new FileStream(output, FileMode.Create))
+	    {
+		using(var sw = new StreamWriter(fs)) {
+		    if(mode.HasFlag(Mode.Silent))
+			sw.WriteLine("#define SILENT");
+
+		    sw.WriteLine($"constexpr const int DATA_COUNT = {files.Length};");
+		    
+		    if(mode.HasFlag(Mode.Execute)) {
+			var exec_str = $"\"{CEscape(execstr)}\"";
+			sw.WriteLine($"constexpr const char* const DATA_EXEC_AFTER = {exec_str};");
+			sw.WriteLine($"static constexpr auto DATA_EXEC_AFTER_HASH = {exec_str}_sha256;");
+		    }
+		    else {
+			sw.WriteLine("constexpr const char* const DATA_EXEC_AFTER = nullptr;");
+			sw.WriteLine("static constexpr auto DATA_EXEC_AFTER_HASH = \"unbound\"_sha256;");
+		    }
+
+		    List<long> sizes= new List<long>();
+		    sw.WriteLine("constexpr const unsigned char DATA[] = {");
+
+		    foreach(var str in files)
+		    {
+			using(var ifs = new FileStream(str, FileMode.Open, FileAccess.Read))
+			{
+			    Console.Write(" + "+str);
+			    try { 
+			        sizes.Add(WriteFile(sw, ifs));
+			        sw.WriteLine();
+				Console.WriteLine(" OK");
+			    } catch(Exception ex) {
+				Console.WriteLine(" FAILED: "+ex.Message);
+			    }
+			}
+		    }
+		    sw.WriteLine("};");
+
+		    Console.WriteLine("Adding lengths");
+		    
+		    sw.WriteLine("constexpr const long DATA_LENGTHS[DATA_COUNT] = {");
+		    foreach(var len in sizes)
+			sw.Write($"\t{len}ll,");
+		    sw.WriteLine("\n};");
+
+		    Console.WriteLine("Adding names");
+		    
+		    sw.WriteLine("constexpr const char* const DATA_NAMES[DATA_COUNT] = {");
+		    foreach(var n in files)
+			sw.Write("\t\""+CEscape(n.Split(Path.DirectorySeparatorChar)[^1])+"\",");
+		    sw.WriteLine("};");
+		}
+	    }
+        }
+
+	static long WriteFile(StreamWriter to, Stream from)
+	{
+	    int rd;
+	    long len=0;
+	    while( (rd = from.ReadByte()) >= 0)
+	    {
+	        to.Write($"0x{((byte)rd):x2}, ");
+		len+=1;
+	    }
+	    return len;
+	}
+
+	static string CEscape(string inp)
+	{
+	    return inp.Replace("\\", @"\\")
+		.Replace("\"", "\\\"");
+	}
+    }
+    class Taker<T>
+    {
+	readonly IEnumerator<T> iter;
+	public Taker(IEnumerable<T> input)
+	{
+	    iter =input.GetEnumerator();
+	}
+
+	public bool TryTake(out T value)
+	{
+	    if(!iter.MoveNext()){
+		value=default;
+		return false;
+	    }
+	    value = iter.Current;
+	    return true;
+	}
+    }
+}
diff --git a/generator/generator.csproj b/generator/generator.csproj
new file mode 100644
index 0000000..d453e9a
--- /dev/null
+++ b/generator/generator.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>
diff --git a/get-deps b/get-deps
new file mode 100755
index 0000000..15d0075
--- /dev/null
+++ b/get-deps
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+git clone https://github.com/aguinet/sha256_literal
diff --git a/include/sha256.h b/include/sha256.h
new file mode 120000
index 0000000..7593a2e
--- /dev/null
+++ b/include/sha256.h
@@ -0,0 +1 @@
+../sha256_literal/sha256.h
\ No newline at end of file
diff --git a/include/sha256_literal.h b/include/sha256_literal.h
new file mode 120000
index 0000000..932617d
--- /dev/null
+++ b/include/sha256_literal.h
@@ -0,0 +1 @@
+../sha256_literal/sha256_literal.h
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..8bb5652
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,150 @@
+#include <iostream>
+#include <sstream>
+#include <fstream>
+#include <filesystem>
+#include <string>
+#include <random>
+#include <vector>
+#include <regex>
+
+#pragma GCC diagnostic ignored "-Wattributes"
+
+#include <sha256_literal.h>
+#include <sha256.h>
+
+using namespace std;
+namespace fs = std::filesystem;
+
+string get_uuid() {
+  static random_device dev;
+  static mt19937 rng(dev());
+
+  uniform_int_distribution<int> dist(0, 15);
+
+  const char *v = "0123456789abcdef";
+  const bool dash[] = { 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0 };
+
+  string res;
+  for (int i = 0; i < 16; i++) {
+    if (dash[i]) res += "-";
+    res += v[dist(rng)];
+    res += v[dist(rng)];
+  }
+  return res;
+}
+
+// DATA
+// DATA_LENGTHS
+// DATA_NAMES
+// DATA_COUNT
+// DATA_EXEC_AFTER
+// DATA_EXEC_AFTER_HASH
+#include "file.h"
+
+bool verify_hash()
+{
+  
+  return (!DATA_EXEC_AFTER || sha256::compute((const uint8_t*)DATA_EXEC_AFTER, strlen(DATA_EXEC_AFTER)) == DATA_EXEC_AFTER_HASH);
+}
+
+string arg_vec_int(int i)
+{
+  stringstream ss;
+  ss << "%arg\\[" << i << "\\]";
+  return ss.str();
+}
+
+string get_exec_str(vector<string> args, string args_full, string loc)
+{
+  string str(DATA_EXEC_AFTER);
+  
+  str = regex_replace(str, std::regex("%location"), loc);
+
+  str = regex_replace(str, std::regex("%argc"), std::to_string(args.size()));
+  
+  str = regex_replace(str, std::regex("%args"), args_full);
+
+  
+  for(int i=0;i<args.size();i++)
+    {
+      str = regex_replace(str, std::regex(arg_vec_int(i)), args[i]);
+    }
+
+  
+  return str;
+}
+
+string arg_strings(int argc,char** argv, vector<string>& output)
+{
+  stringstream ss;
+  for(int i=1;i<argc;i++)
+    {
+      auto argi = string(argv[i]);
+      ss << argi;
+      if(i!=argc-1)
+	ss << ' ';
+      output.push_back(argi);
+    }
+  return ss.str();
+}
+
+void write_to_file(string to, const unsigned char* data, long length)
+{
+  ofstream file;
+  file.open(to, ios::out | ios::binary );
+  file.write((const char*)data, length);
+  file.close();
+}
+
+long get_index(int i)
+{
+  if(i<=0) return 0;
+  else return get_index(i-2) + DATA_LENGTHS[i-1];
+}
+
+const unsigned char* get_data(int i)
+{
+  const unsigned char* data = DATA;
+  if(i==0) return DATA;
+  for(int j=0;j<i;j++)
+    {
+      data+=DATA_LENGTHS[j];
+    }
+  return data;
+}
+
+int main(int argc,char** argv)
+{
+  auto path = fs::temp_directory_path() / get_uuid();
+  vector<string> vecargs;
+  auto args = arg_strings(argc,argv, vecargs);
+
+  if(!verify_hash())
+    {
+      cerr << "Error: Bad message hash\n";
+      return 1;
+    }
+  
+#ifndef SILENT
+  cout << "Extracting " << DATA_COUNT <<  " files to " << path << "...\n";
+#endif
+
+  fs::create_directory(path);
+  for(int i=0;i<DATA_COUNT;i++)
+    {
+#ifndef SILENT
+      cout << " <- " << DATA_NAMES[i] << " (" << DATA_LENGTHS[i] << ")\n";
+#endif
+      write_to_file(path / DATA_NAMES[i], get_data(i), DATA_LENGTHS[i]);
+    }
+
+  if(DATA_EXEC_AFTER) {
+    string execstr = get_exec_str(vecargs, args, path);
+#ifndef SILENT
+    cout << "exec: "  << execstr << '\n';
+#endif
+    system(execstr.c_str());
+  }
+  fs::remove_all(path);
+  return 0;
+}
diff --git a/sfexec-create b/sfexec-create
new file mode 100755
index 0000000..8e6903b
--- /dev/null
+++ b/sfexec-create
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+SCRIPTLINK=$(readlink -f "$0")
+SCRIPTPATH="$( cd "$(dirname "$SCRIPTLINK")" >/dev/null 2>&1 ; pwd -P )"
+
+dotnet run --project "$SCRIPTPATH/generator" -o "$SCRIPTPATH/file.h" "$@" || exit 1
+
+
+[[ -f "$SCRIPTPATH/file.h" ]] || exit 1
+
+echo "Compiling binary..."
+
+g++ -I$SCRIPTPATH/include/ -w --std=c++17 "$SCRIPTPATH/main.cpp" "$SCRIPTPATH/sha256_literal/sha256.cpp" -o sfexec
+
+rm "$SCRIPTPATH/file.h"
+
+echo "Complete."
diff --git a/sfexec-create-compress b/sfexec-create-compress
new file mode 100755
index 0000000..1153ce9
--- /dev/null
+++ b/sfexec-create-compress
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+sfexec-create "$@" || exit 1
+
+echo "Compressing..."
+gzip sfexec || exit 1
+
+sfexec-create -s -e 'gzip -d %location/sfexec.gz && chmod +x %location/sfexec && %location/sfexec %args' sfexec.gz > /dev/null || exit 1
+
+rm sfexec.gz
+echo "Done."