phantop/doukutsu-rs
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abuse ASLR for RNG seeding

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Alula 2022-10-15 14:13:04 +02:00
parent 6607d2fc15
commit 3a756e0ac4
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GPG key ID: 3E00485503A1D8BA
5 changed files with 58 additions and 21 deletions
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3
src/engine_constants/mod.rs
View file

@ -319,6 +319,7 @@ pub struct EngineConstants {
pub is_cs_plus: bool,
pub is_switch: bool,
pub is_demo: bool,
pub crime_mode: bool,
pub supports_og_textures: bool,
pub game: GameConsts,
pub player: PlayerConsts,
@ -352,6 +353,7 @@ impl Clone for EngineConstants {
is_cs_plus: self.is_cs_plus,
is_switch: self.is_switch,
is_demo: self.is_demo,
crime_mode: self.crime_mode,
supports_og_textures: self.supports_og_textures,
game: self.game,
player: self.player,
@ -387,6 +389,7 @@ impl EngineConstants {
is_cs_plus: false,
is_switch: false,
is_demo: false,
crime_mode: false,
supports_og_textures: false,
game: GameConsts {
intro_stage: 72,

2
src/menu/coop_menu.rs
View file

@ -79,7 +79,7 @@ impl PlayerCountMenu {
self.skin_menu.selected = SkinMenuEntry::Skin;
if !self.on_title && state.constants.is_cs_plus {
if !self.on_title && !state.constants.crime_mode && state.constants.is_cs_plus {
self.current_menu = CurrentMenu::PlayerSkin;
}

2
src/menu/settings_menu.rs
View file

@ -253,7 +253,7 @@ impl SettingsMenu {
);
// NS version uses two different maps, therefore we can't dynamically switch between graphics presets.
if state.constants.supports_og_textures {
if !state.constants.crime_mode && state.constants.supports_og_textures {
if !state.constants.is_switch || self.on_title {
self.graphics.push_entry(
GraphicsMenuEntry::OriginalTextures,

13
src/scene/title_scene.rs
View file

@ -487,6 +487,19 @@ impl Scene for TitleScene {
}
}
if state.constants.crime_mode {
state.font.draw_colored_text_with_shadow_scaled(
"* TAS MODE *".chars(),
5.0,
5.0,
1.0,
(0xff, 0, 0, 0xff),
&state.constants,
&mut state.texture_set,
ctx,
)?;
}
self.nikumaru_rec.draw(state, ctx, &self.frame)?;
match self.current_menu {

59
src/shared_game_state.rs
View file

@ -6,14 +6,14 @@ use chrono::{Datelike, Local};
use crate::bmfont_renderer::BMFontRenderer;
use crate::caret::{Caret, CaretType};
use crate::common::{ControlFlags, Direction, FadeState};
use crate::components::draw_common::{draw_number, Alignment};
use crate::components::draw_common::{Alignment, draw_number};
use crate::engine_constants::EngineConstants;
use crate::framework::{filesystem, graphics};
use crate::framework::backend::BackendTexture;
use crate::framework::context::Context;
use crate::framework::error::GameResult;
use crate::framework::graphics::{create_texture_mutable, set_render_target};
use crate::framework::vfs::OpenOptions;
use crate::framework::{filesystem, graphics};
#[cfg(feature = "hooks")]
use crate::hooks::init_hooks;
use crate::i18n::Locale;
@ -24,8 +24,8 @@ use crate::npc::NPCTable;
use crate::profile::GameProfile;
use crate::rng::XorShift;
use crate::scene::game_scene::GameScene;
use crate::scene::title_scene::TitleScene;
use crate::scene::Scene;
use crate::scene::title_scene::TitleScene;
#[cfg(feature = "scripting-lua")]
use crate::scripting::lua::LuaScriptingState;
use crate::scripting::tsc::credit_script::{CreditScript, CreditScriptVM};
@ -315,7 +315,7 @@ impl SharedGameState {
pub fn new(ctx: &mut Context) -> GameResult<SharedGameState> {
let mut constants = EngineConstants::defaults();
let mut sound_manager = SoundManager::new(ctx)?;
let settings = Settings::load(ctx)?;
let mut settings = Settings::load(ctx)?;
let mod_requirements = ModRequirements::load(ctx)?;
let vanilla_ext_exe = match option_env!("VANILLA_EXT_EXE") {
@ -333,43 +333,59 @@ impl SharedGameState {
if vanilla_extractor.is_some() {
let result = vanilla_extractor.unwrap().extract_data();
if result.is_err() {
error!("Failed to extract vanilla data: {}", result.unwrap_err());
log::error!("Failed to extract vanilla data: {}", result.unwrap_err());
}
}
if filesystem::exists(ctx, "/base/lighting.tbl") {
info!("Cave Story+ (Switch) data files detected.");
log::info!("Cave Story+ (Switch) data files detected.");
ctx.size_hint = (854, 480);
constants.apply_csplus_patches(&mut sound_manager);
constants.apply_csplus_nx_patches();
constants.load_nx_stringtable(ctx)?;
} else if filesystem::exists(ctx, "/base/ogph/SellScreen.bmp") {
info!("WiiWare DEMO data files detected.");
log::info!("WiiWare DEMO data files detected.");
constants.apply_csplus_patches(&mut sound_manager);
constants.apply_csdemo_patches();
} else if filesystem::exists(ctx, "/base/strap_a_en.bmp") {
info!("WiiWare data files detected."); //Missing Challenges and Remastered Soundtrack but identical to CS+ PC otherwise
log::info!("WiiWare data files detected."); //Missing Challenges and Remastered Soundtrack but identical to CS+ PC otherwise
constants.apply_csplus_patches(&mut sound_manager);
} else if filesystem::exists(ctx, "/root/buid_time.txt") {
error!("DSiWare data files detected. !UNSUPPORTED!"); //Freeware 2.0, sprites are arranged VERY differently + separate drowned carets
log::error!("DSiWare data files detected. !UNSUPPORTED!"); //Freeware 2.0, sprites are arranged VERY differently + separate drowned carets
} else if filesystem::exists(ctx, "/darken.tex") || filesystem::exists(ctx, "/darken.png") {
error!("EShop data files detected. !UNSUPPORTED!"); //Ditto, drowned carets finally part of mychar, the turning point towards CS+
log::error!("EShop data files detected. !UNSUPPORTED!"); //Ditto, drowned carets finally part of mychar, the turning point towards CS+
} else if filesystem::exists(ctx, "/data/stage3d/") {
error!("CS3D data files detected. !UNSUPPORTED!"); //Sprites are technically all there but filenames differ, + no n3ddta support
log::error!("CS3D data files detected. !UNSUPPORTED!"); //Sprites are technically all there but filenames differ, + no n3ddta support
} else if filesystem::exists(ctx, "/base/Nicalis.bmp") || filesystem::exists(ctx, "/base/Nicalis.png") {
info!("Cave Story+ (PC) data files detected.");
log::info!("Cave Story+ (PC) data files detected.");
constants.apply_csplus_patches(&mut sound_manager);
} else if filesystem::exists(ctx, "/mrmap.bin") {
info!("CSE2E data files detected.");
log::info!("CSE2E data files detected.");
} else if filesystem::exists(ctx, "/stage.dat") {
info!("NXEngine-evo data files detected.");
log::info!("NXEngine-evo data files detected.");
}
for soundtrack in constants.soundtracks.iter_mut() {
if filesystem::exists(ctx, &soundtrack.path) {
info!("Enabling soundtrack {} from {}.", soundtrack.name, soundtrack.path);
soundtrack.available = true;
#[cfg(target_os = "linux")]
{
if let Ok(preload) = std::env::var("LIBTAS_LIBRARY_PATH") {
if preload != "" {
constants.crime_mode = true;
}
}
}
if !constants.crime_mode {
for soundtrack in constants.soundtracks.iter_mut() {
if filesystem::exists(ctx, &soundtrack.path) {
log::info!("Enabling soundtrack {} from {}.", soundtrack.name, soundtrack.path);
soundtrack.available = true;
}
}
} else {
// easter egg
settings.soundtrack = "Organya".to_owned();
settings.original_textures = true;
settings.seasonal_textures = false;
}
let season = Season::current();
@ -413,13 +429,18 @@ impl SharedGameState {
#[cfg(feature = "hooks")]
init_hooks();
let seed = chrono::Local::now().timestamp() as i32
+ ((SharedGameState::save_game as usize >> 7)
^ (SharedGameState::save_game as usize >> 13)
^ (SharedGameState::new as usize >> 23)) as i32;
Ok(SharedGameState {
control_flags: ControlFlags(0),
game_flags: bitvec::bitvec![0; 8000],
skip_flags: bitvec::bitvec![0; 64],
map_flags: bitvec::bitvec![0; 64],
fade_state: FadeState::Hidden,
game_rng: XorShift::new(chrono::Local::now().timestamp() as i32),
game_rng: XorShift::new(seed),
effect_rng: XorShift::new(123),
tile_size: TileSize::Tile16x16,
quake_counter: 0,