Cleanup & add README, LICENSE, CI config

This commit is contained in:
Luke Street 2023-09-07 16:29:18 -04:00
parent 2b7cb77400
commit 2b472b0ccd
7 changed files with 544 additions and 91 deletions

108
.github/workflows/build.yml vendored Normal file
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@ -0,0 +1,108 @@
name: Build
on:
push:
paths-ignore:
- '*.md'
- 'LICENSE*'
pull_request:
env:
CARGO_BIN_NAME: sjiswrap
CARGO_TARGET_DIR: target
jobs:
check:
name: Check
runs-on: windows-latest
env:
RUSTFLAGS: -D warnings
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Setup Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
components: clippy
- name: Cargo check
run: cargo check --all-features --all-targets
- name: Cargo clippy
run: cargo clippy --all-features --all-targets
fmt:
name: Format
runs-on: ubuntu-latest
env:
RUSTFLAGS: -D warnings
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Setup Rust toolchain
# We use nightly options in rustfmt.toml
uses: dtolnay/rust-toolchain@nightly
with:
components: rustfmt
- name: Cargo fmt
run: cargo fmt --all --check
build:
name: Build
strategy:
matrix:
include:
- platform: windows-latest
target: i686-pc-windows-msvc
name: windows-x86
build: build
fail-fast: false
runs-on: ${{ matrix.platform }}
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Install dependencies
if: matrix.packages != ''
run: |
sudo apt-get -y update
sudo apt-get -y install ${{ matrix.packages }}
- name: Install cargo-zigbuild
if: matrix.build == 'zigbuild'
run: pip install ziglang==0.10.1.post1 cargo-zigbuild==0.17.0
- name: Setup Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
targets: ${{ matrix.target }}
- name: Cargo build
run: cargo ${{ matrix.build }} --release --all-features --target ${{ matrix.target }} --bin ${{ env.CARGO_BIN_NAME }}
- name: Upload artifacts
uses: actions/upload-artifact@v3
with:
name: ${{ matrix.name }}
path: |
${{ env.CARGO_TARGET_DIR }}/release/${{ env.CARGO_BIN_NAME }}
${{ env.CARGO_TARGET_DIR }}/release/${{ env.CARGO_BIN_NAME }}.exe
${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/release/${{ env.CARGO_BIN_NAME }}
${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/release/${{ env.CARGO_BIN_NAME }}.exe
if-no-files-found: error
release:
name: Release
if: startsWith(github.ref, 'refs/tags/')
runs-on: ubuntu-latest
needs: [ build ]
steps:
- name: Download artifacts
uses: actions/download-artifact@v3
with:
path: artifacts
- name: Rename artifacts
working-directory: artifacts
run: |
mkdir ../out
for i in */*/release/$CARGO_BIN_NAME*; do
mv "$i" "../out/$(sed -E "s/([^/]+)\/[^/]+\/release\/($CARGO_BIN_NAME)/\2-\1/" <<< "$i")"
done
ls -R ../out
- name: Release
uses: softprops/action-gh-release@v1
with:
files: out/*

2
Cargo.lock generated
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@ -52,7 +52,7 @@ checksum = "bc62ccb14881da5d1862cda3a9648fb4a4897b2aff0b2557b89da44a5e550b7c"
[[package]]
name = "sjiswrap"
version = "0.1.0"
version = "1.0.0"
dependencies = [
"anyhow",
"encoding_rs",

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@ -1,7 +1,24 @@
[package]
name = "sjiswrap"
version = "0.1.0"
description = "UTF-8 to Shift JIS wrapper for old compilers."
authors = ["Luke Street <luke@street.dev>"]
license = "MIT OR Apache-2.0"
version = "1.0.0"
edition = "2021"
publish = false
repository = "https://github.com/encounter/sjiswrap"
readme = "README.md"
categories = ["command-line-utilities"]
# Size optimizations
[profile.release]
codegen-units = 1
lto = true
opt-level = "z"
panic = "abort"
[features]
debug = []
[dependencies]
anyhow = "1.0.72"

201
LICENSE-APACHE Normal file
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@ -0,0 +1,201 @@
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Copyright 2023 Luke Street.
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LICENSE-MIT Normal file
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@ -0,0 +1,21 @@
MIT License
Copyright 2023 Luke Street.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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SOFTWARE.

54
README.md Normal file
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@ -0,0 +1,54 @@
# sjiswrap [![Build Status]][actions]
[Build Status]: https://github.com/encounter/sjiswrap/actions/workflows/build.yml/badge.svg
[actions]: https://github.com/encounter/sjiswrap/actions
UTF-8 to Shift JIS wrapper for old 32-bit Windows compilers.
When the wrapped executable reads a text file, it will be encoded from UTF-8 to Shift JIS on the fly.
Encoded file extensions:
- `.c`
- `.cc`
- `.cp`
- `.cpp`
- `.cxx`
- `.h`
- `.hh`
- `.hp`
- `.hpp`
- `.hxx`
## Usage
Download the latest release from [here](https://github.com/encounter/sjiswrap/releases).
```shell
$ sjiswrap.exe <exe> [args...]
```
## Building
```shell
$ cargo build --target i686-pc-windows-msvc --release
```
For smaller binaries:
```shell
$ cargo +nightly build -Z build-std=std,panic_abort --target i686-pc-windows-msvc --release
```
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as
defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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@ -1,5 +1,4 @@
#![allow(non_snake_case)]
#![allow(non_snake_case, clippy::let_and_return)]
use std::{
borrow::Cow,
cmp::min,
@ -13,15 +12,15 @@ use std::{
sync::Mutex,
};
use anyhow::Result;
use anyhow::{Context, Result};
use encoding_rs::SHIFT_JIS;
use lazy_static::lazy_static;
use windows::{
core::PCSTR,
core::{PCSTR, PCWSTR},
Win32::{
Foundation::{
CloseHandle, GetLastError, SetLastError, BOOL, GENERIC_ACCESS_RIGHTS, GENERIC_READ,
HANDLE,
HANDLE, INVALID_HANDLE_VALUE,
},
Security::SECURITY_ATTRIBUTES,
Storage::FileSystem::{
@ -33,29 +32,91 @@ use windows::{
},
};
/// Whether to hook and encode a file.
fn is_text_file(path: &str) -> bool {
path.ends_with(".c")
|| path.ends_with(".cc")
|| path.ends_with(".cp")
|| path.ends_with(".cpp")
|| path.ends_with(".cxx")
|| path.ends_with(".h")
|| path.ends_with(".hh")
|| path.ends_with(".hp")
|| path.ends_with(".hpp")
|| path.ends_with(".hxx")
}
macro_rules! debug_println {
($($arg:tt)*) => {
#[cfg(feature = "debug")]
{
// Writing to console will overwrite LastError
let err = unsafe { GetLastError() };
eprintln!($($arg)*);
unsafe { SetLastError(err) };
}
};
}
fn main() -> Result<()> {
let args: Vec<OsString> = std::env::args_os().collect();
if args.len() < 2 {
println!("Usage: {} <exe>", args[0].to_string_lossy());
exit(1);
}
let path = PathBuf::from(&args[1]);
let parent = CString::new(
path.parent()
.context("Failed to get executable parent directory")?
.to_string_lossy()
.as_ref(),
)
.unwrap();
let parent =
get_full_path(&parent).expect("Failed to get absolute executable parent directory");
unsafe { SetDllDirectoryA(PCSTR(parent.as_ptr() as *const u8)) }
.ok()
.context("SetDllDirectoryA() failed")?;
debug_println!("SetDllDirectoryA({:?})", parent.to_string_lossy());
let mut buf = Vec::new();
File::open(&path)
.with_context(|| format!("Failed to open executable: '{}'", path.display()))?
.read_to_end(&mut buf)
.with_context(|| format!("Failed to read executable: '{}'", path.display()))?;
let mut hooks = HashMap::new();
hooks.insert("kernel32.dll!GetCommandLineA".into(), hook_GetCommandLineA as *const c_void);
hooks.insert("kernel32.dll!GetCommandLineW".into(), hook_GetCommandLineW as *const c_void);
hooks.insert("kernel32.dll!CreateFileA".into(), hook_CreateFileA as *const c_void);
hooks.insert("kernel32.dll!CreateFileW".into(), hook_CreateFileW as *const c_void);
hooks.insert("kernel32.dll!GetFileSize".into(), hook_GetFileSize as *const c_void);
hooks.insert("kernel32.dll!CloseHandle".into(), hook_CloseHandle as *const c_void);
hooks.insert("kernel32.dll!ReadFile".into(), hook_ReadFile as *const c_void);
hooks.insert("kernel32.dll!SetFilePointer".into(), hook_SetFilePointer as *const c_void);
unsafe { memexec::memexec_exe_with_hooks(&buf, &hooks) }.expect("Failed to execute");
Ok(())
}
/// File that has been read into memory and encoded.
struct FileHandle {
data: Vec<u8>,
pos: u64,
}
/// Global state shared between hooks.
#[derive(Default)]
struct GlobalState {
cmdline: Option<CString>,
file_handles: HashMap<isize, FileHandle>,
}
lazy_static! {
static ref GLOBAL_STATE: Mutex<GlobalState> = Default::default();
}
fn get_full_path(path: &CStr) -> Result<CString> {
let mut buf = [0u8; 4096];
let len =
unsafe { GetFullPathNameA(PCSTR(path.as_ptr() as *const u8), Some(buf.as_mut()), None) };
if len == 0 {
return Err(std::io::Error::last_os_error().into());
}
Ok(unsafe { CString::from_vec_with_nul_unchecked(buf[..len as usize + 1].to_vec()) })
}
/// `GetCommandLineA` hook. Skips our own executable name and replaces the subprocess path with an absolute path.
extern "stdcall" fn hook_GetCommandLineA() -> PCSTR {
let mut guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if let Some(str) = &guard.cmdline {
@ -122,15 +183,12 @@ extern "stdcall" fn hook_GetCommandLineA() -> PCSTR {
PCSTR(guard.cmdline.as_ref().unwrap().as_ptr() as *const u8)
}
fn is_text_file(path: &str) -> bool {
path.ends_with(".c")
|| path.ends_with(".cc")
|| path.ends_with(".cp")
|| path.ends_with(".cpp")
|| path.ends_with(".h")
|| path.ends_with(".hpp")
/// `GetCommandLineW` hook. Currently unsupported.
extern "stdcall" fn hook_GetCommandLineW() -> PCSTR {
panic!("GetCommandLineW() is not supported");
}
/// `CreateFileA` hook. If it's a text file, read it into memory and encode it as Shift-JIS.
extern "stdcall" fn hook_CreateFileA(
lpFileName: PCSTR,
dwDesiredAccess: GENERIC_ACCESS_RIGHTS,
@ -151,7 +209,7 @@ extern "stdcall" fn hook_CreateFileA(
hTemplateFile,
)
}
.unwrap_or(HANDLE(0));
.unwrap_or(INVALID_HANDLE_VALUE);
let err = unsafe { GetLastError() };
let path = unsafe { CStr::from_ptr(lpFileName.as_ptr() as *const c_char) }.to_string_lossy();
@ -181,16 +239,9 @@ extern "stdcall" fn hook_CreateFileA(
match encoded {
Cow::Borrowed(_) => {
// No modifications were made, use the original data
// println!("READ FILE {:#X}, size {:#X} (UNCHANGED)", ret.0, filesize);
guard.file_handles.insert(ret.0, FileHandle { data, pos: 0 });
}
Cow::Owned(data) => {
println!(
"READ FILE {:#X}, size {:#X} (CHANGED: {:#X})",
ret.0,
filesize,
data.len()
);
guard.file_handles.insert(ret.0, FileHandle { data, pos: 0 });
}
}
@ -198,42 +249,54 @@ extern "stdcall" fn hook_CreateFileA(
}
}
}
// println!("CreateFileA({}, {:#X}) = {:#X}", path, dwDesiredAccess.0, ret.0 as u32);
debug_println!("CreateFileA({}, {:#X}) = {:#X}", path, dwDesiredAccess.0, ret.0 as u32);
unsafe { SetLastError(err) };
ret
}
/// `CreateFileW` hook. Currently unsupported.
extern "stdcall" fn hook_CreateFileW(
_lpFileName: PCWSTR,
_dwDesiredAccess: GENERIC_ACCESS_RIGHTS,
_dwShareMode: FILE_SHARE_MODE,
_lpSecurityAttributes: *const SECURITY_ATTRIBUTES,
_dwCreationDisposition: FILE_CREATION_DISPOSITION,
_dwFlagsAndAttributes: FILE_FLAGS_AND_ATTRIBUTES,
_hTemplateFile: HANDLE,
) -> HANDLE {
panic!("CreateFileW() is not supported");
}
/// `GetFileSize` hook. If the file was read into memory, return that size instead.
extern "stdcall" fn hook_GetFileSize(hFile: HANDLE, lpFileSizeHigh: *mut u32) -> u32 {
if !hFile.is_invalid() {
let guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if let Some(file) = guard.file_handles.get(&hFile.0) {
// println!("OVERRIDE GetFileSize({:#X}) = {:#X}", hFile.0, file.data.len() as u32);
debug_println!("OVERRIDE: GetFileSize({:#X}) = {:#X}", hFile.0, file.data.len() as u32);
return file.data.len() as u32;
}
}
let ret = unsafe { GetFileSize(hFile, Some(lpFileSizeHigh)) };
// let err = unsafe { GetLastError() };
// println!("GetFileSize({:#X}, {:?}) = {:#X}", hFile.0, lpFileSizeHigh, ret);
// unsafe { SetLastError(err) };
debug_println!("GetFileSize({:#X}, {:?}) = {:#X}", hFile.0, lpFileSizeHigh, ret);
ret
}
/// `CloseHandle` hook. If the file was read into memory, free it.
extern "stdcall" fn hook_CloseHandle(hObject: HANDLE) -> BOOL {
if !hObject.is_invalid() {
let mut guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if guard.file_handles.remove(&hObject.0).is_some() {
// println!("REMOVED HANDLE {:#X}", hObject.0);
debug_println!("File handle removed: {:#X}", hObject.0);
}
}
let ret = unsafe { CloseHandle(hObject) };
// let err = unsafe { GetLastError() };
// println!("CloseHandle({:#X}) = {:#X}", hObject.0, ret.0);
// unsafe { SetLastError(err) };
debug_println!("CloseHandle({:#X}) = {:#X}", hObject.0, ret.0);
ret
}
/// `ReadFile` hook. If the file was read into memory, read from that instead.
extern "stdcall" fn hook_ReadFile(
hFile: HANDLE,
lpBuffer: *mut c_void,
@ -259,10 +322,14 @@ extern "stdcall" fn hook_ReadFile(
if !lpNumberOfBytesRead.is_null() {
unsafe { *lpNumberOfBytesRead = count };
}
// println!(
// "OVERRIDE ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
// hFile.0, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, count
// );
debug_println!(
"OVERRIDE: ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
hFile.0,
lpBuffer,
nNumberOfBytesToRead,
lpNumberOfBytesRead,
count
);
return true.into();
}
}
@ -276,15 +343,18 @@ extern "stdcall" fn hook_ReadFile(
Some(lpOverlapped),
)
};
let err = unsafe { GetLastError() };
// println!(
// "ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
// hFile.0, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, ret.0
// );
unsafe { SetLastError(err) };
debug_println!(
"ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
hFile.0,
lpBuffer,
nNumberOfBytesToRead,
lpNumberOfBytesRead,
ret.0
);
ret
}
/// `SetFilePointer` hook. If the file was read into memory, set the position in that instead.
extern "stdcall" fn hook_SetFilePointer(
hFile: HANDLE,
lDistanceToMove: i32,
@ -308,9 +378,13 @@ extern "stdcall" fn hook_SetFilePointer(
file_size,
);
file.pos = pos;
println!(
debug_println!(
"OVERRIDE SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
hFile.0, distance_to_move, lpDistanceToMoveHigh, dwMoveMethod.0, pos
hFile.0,
distance_to_move,
lpDistanceToMoveHigh,
dwMoveMethod.0,
pos
);
if !lpDistanceToMoveHigh.is_null() {
unsafe { *lpDistanceToMoveHigh = (pos >> 32) as i32 };
@ -321,46 +395,24 @@ extern "stdcall" fn hook_SetFilePointer(
let ret =
unsafe { SetFilePointer(hFile, lDistanceToMove, Some(lpDistanceToMoveHigh), dwMoveMethod) };
let err = unsafe { GetLastError() };
// println!(
// "SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
// hFile.0, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod.0, ret
// );
unsafe { SetLastError(err) };
debug_println!(
"SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
hFile.0,
lDistanceToMove,
lpDistanceToMoveHigh,
dwMoveMethod.0,
ret
);
ret
}
fn main() -> Result<()> {
let args: Vec<OsString> = std::env::args_os().collect();
if args.len() < 2 {
println!("Usage: {} <exe>", args[0].to_string_lossy());
exit(1);
/// Get the absolute path of a file.
fn get_full_path(path: &CStr) -> Result<CString> {
let mut buf = [0u8; 4096];
let len =
unsafe { GetFullPathNameA(PCSTR(path.as_ptr() as *const u8), Some(buf.as_mut()), None) };
if len == 0 {
return Err(std::io::Error::last_os_error().into());
}
let path = PathBuf::from(&args[1]);
let parent = CString::new(
path.parent()
.expect("Failed to get executable parent directory")
.to_string_lossy()
.as_ref(),
)
.unwrap();
let parent =
get_full_path(&parent).expect("Failed to get absolute executable parent directory");
unsafe { SetDllDirectoryA(PCSTR(parent.as_ptr() as *const u8)) }
.expect("SetDllDirectoryA() failed");
// println!("SetDllDirectoryA({:?})", parent.to_string_lossy());
let mut buf = Vec::new();
File::open(&path).unwrap().read_to_end(&mut buf).unwrap();
let mut hooks = HashMap::new();
hooks.insert("kernel32.dll!GetCommandLineA".into(), hook_GetCommandLineA as *const c_void);
hooks.insert("kernel32.dll!CreateFileA".into(), hook_CreateFileA as *const c_void);
hooks.insert("kernel32.dll!GetFileSize".into(), hook_GetFileSize as *const c_void);
hooks.insert("kernel32.dll!CloseHandle".into(), hook_CloseHandle as *const c_void);
hooks.insert("kernel32.dll!ReadFile".into(), hook_ReadFile as *const c_void);
hooks.insert("kernel32.dll!SetFilePointer".into(), hook_SetFilePointer as *const c_void);
unsafe { memexec::memexec_exe_with_hooks(&buf, &hooks) }.unwrap();
Ok(())
Ok(unsafe { CString::from_vec_with_nul_unchecked(buf[..len as usize + 1].to_vec()) })
}