saekawa 0.4.0: rewrite boogaloo

.cargo/config.toml

@@ -1,2 +0,0 @@
-[build]
-target = "i686-pc-windows-msvc"

.gitignore

@@ -133,3 +133,5 @@ fabric.properties
 
 # End of https://www.toptal.com/developers/gitignore/api/intellij
 
+*.pfx
+*.json

Cargo.toml

@@ -1,42 +1,38 @@
 [package]
 name = "saekawa"
-version = "0.3.4"
-authors = ["beerpsi <lacvtg.a1.2023@gmail.com>"]
+version = "0.4.0"
 edition = "2021"
 license = "0BSD"
 
 [lib]
 crate-type = ["cdylib"]
 
-[profile.release]
-strip = true  # Automatically strip symbols from the binary.
-opt-level = "z"  # Optimize for size.
-lto = true
-codegen-units = 1
-panic = "abort"
-
 [dependencies]
-aes = "0.8.3"
-anyhow = "1.0.75"
-binary-reader = "0.4.5"
+aes = "0.8.4"
 cbc = "0.1.2"
-chrono = "0.4.31"
+chrono = "0.4.38"
 confy = "0.6.1"
-crc32fast = "1.3.2"
 crochet = "0.2.3"
-env_logger = "0.10.2"
+env_logger = "0.11.3"
 faster-hex = "0.9.0"
-flate2 = "1.0.28"
-hex-literal = "0.4.1"
-lazy_static = "1.4.0"
-log = "0.4.20"
-num_enum = "0.7.1"
+flate2 = "1.0.30"
+lightningscanner = "1.0.2"
+log = "0.4.21"
+num_enum = "0.7.2"
 pbkdf2 = "0.12.2"
-serde = { version = "1.0.193", features = ["derive"] }
-serde-aux = "4.3.1"
-serde_json = "1.0.108"
+rand = "0.8.5"
+rust-ini = "0.21.0"
+serde = { version = "1.0.203", features = ["derive"] }
+serde-aux = "4.5.0"
+serde_json = "1.0.117"
 sha1 = "0.10.6"
-ureq = { version = "2.9.1", features = ["json"] }
-url = "2.5.0"
-widestring = "1.0.2"
-winapi = { version = "0.3.9", features = ["winhttp", "minwindef", "debugapi", "synchapi", "libloaderapi", "processthreadsapi"] }
+sha2 = "0.10.8"
+snafu = "0.8.3"
+ureq = { version = "2.9.7", features = ["json"] }
+url = { version = "2.5.2", features = ["serde"] }
+widestring = "1.1.0"
+winapi = { version = "0.3.9", features = ["minwindef", "winnt", "psapi", "processthreadsapi", "libloaderapi", "errhandlingapi", "winhttp", "synchapi", "debugapi", "wincon", "heapapi", "winbase", "wincrypt", "softpub", "wintrust"] }
+
+[build-dependencies]
+snafu = "0.8.3"
+vergen = { version = "8.3.1", features = ["build", "git", "gitcl"] }

build.rs

@@ -0,0 +1,12 @@
+use snafu::{prelude::*, Whatever};
+use vergen::EmitBuilder;
+
+pub fn main() -> Result<(), Whatever> {
+    EmitBuilder::builder()
+        .build_timestamp()
+        .git_sha(false)
+        .git_branch()
+        .emit()
+        .with_whatever_context(|_| "Could not emit version information")?;
+    Ok(())
+}

release.ps1

@@ -0,0 +1,16 @@
+cargo build --target i686-pc-windows-msvc --release
+
+if (!(Test-Path ./saekawa.pfx)) {
+    $cert = New-SelfSignedCertificate -Type Custom `
+        -Subject "CN=saekawa self-signed certificate" `
+        -CertStoreLocation cert:\CurrentUser\My `
+        -KeyUsage DigitalSignature
+
+    Export-PfxCertificate -Cert $cert `
+        -FilePath saekawa.pfx `
+        -Password (ConvertTo-SecureString -String "saekawa" -Force -AsPlainText)
+}
+
+signtool sign -f saekawa.pfx -p "saekawa" -fd SHA256 -t http://timestamp.comodoca.com/authenticode -v target/i686-pc-windows-msvc/release/saekawa.dll
+
+Write-Output "Remember to make the .rtext section writable for auto-updates! I have fuck all idea how to do it in Rust itself, so it's manual from here. The DLL has already been signed."

src/config/defaults.rs

@@ -0,0 +1,23 @@
+use std::{path::PathBuf, str::FromStr};
+
+use url::Url;
+
+pub(super) fn default_true() -> bool {
+    true
+}
+
+pub(super) fn default_false() -> bool {
+    false
+}
+
+pub(super) fn default_timeout() -> u64 {
+    5000
+}
+
+pub(super) fn default_tachi_url() -> Url {
+    Url::parse("https://kamai.tachi.ac").unwrap()
+}
+
+pub(super) fn default_failed_import_dir() -> Option<PathBuf> {
+    PathBuf::from_str("failed_saekawa_imports").ok()
+}

src/config/migrate.rs

@@ -0,0 +1,42 @@
+use serde::{Deserialize, Serialize};
+
+use super::defaults::*;
+
+#[derive(Serialize, Deserialize, Debug, Clone, Default)]
+pub struct OldSaekawaConfig {
+    pub general: OldGeneralConfig,
+    pub cards: OldCardsConfig,
+    pub tachi: OldTachiConfig,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, Default)]
+pub struct OldGeneralConfig {
+    #[serde(default = "default_true")]
+    pub enable: bool,
+
+    #[serde(default = "default_true")]
+    pub export_class: bool,
+
+    #[serde(default = "default_false")]
+    pub export_pbs: bool,
+
+    #[serde(default = "default_false")]
+    pub fail_over_lamp: bool,
+
+    #[serde(default = "default_timeout")]
+    pub timeout: u64,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct OldCardsConfig {
+    #[serde(default)]
+    pub whitelist: Vec<String>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct OldTachiConfig {
+    pub base_url: String,
+    pub status: String,
+    pub import: String,
+    pub api_key: String,
+}

src/config/mod.rs

@@ -0,0 +1,129 @@
+mod defaults;
+mod migrate;
+
+use std::{collections::HashMap, path::PathBuf, str::FromStr};
+
+use log::{info, warn};
+use migrate::OldSaekawaConfig;
+use serde::{Deserialize, Serialize};
+use snafu::{ResultExt, Snafu};
+use url::Url;
+
+use self::defaults::*;
+
+#[derive(Serialize, Deserialize, Debug, Clone, Default)]
+pub struct SaekawaConfig {
+    pub general: GeneralConfig,
+    pub cards: HashMap<String, String>,
+    pub tachi: TachiConfig,
+}
+
+#[derive(Snafu, Debug)]
+pub enum ConfigLoadError {
+    #[snafu(display(
+        "Could not load or save configuration. Is the configuration format correct?"
+    ))]
+    ConfyError { source: confy::ConfyError },
+
+    #[snafu(display("Could not migrate to new configuration format: {source:#?}"))]
+    MigrationError { source: MigrationError },
+}
+
+#[derive(Snafu, Debug)]
+pub enum MigrationError {
+    #[snafu(display("Invalid Tachi base URL."))]
+    InvalidTachiUrl { source: url::ParseError },
+}
+
+impl SaekawaConfig {
+    pub fn load() -> Result<SaekawaConfig, ConfigLoadError> {
+        let result = confy::load_path::<SaekawaConfig>("saekawa.toml");
+
+        match result {
+            Ok(_) => result.context(ConfySnafu),
+            Err(_) => {
+                warn!("Could not parse configuration, attempting to parse as old configuration...");
+                let old_config =
+                    confy::load_path::<OldSaekawaConfig>("saekawa.toml").context(ConfySnafu)?;
+
+                info!("Successfully loaded as old configuration, migrating to new format...");
+                let tachi_base_url = Url::parse(&old_config.tachi.base_url)
+                    .context(InvalidTachiUrlSnafu)
+                    .context(MigrationSnafu)?;
+                let new_tachi_config = TachiConfig {
+                    base_url: tachi_base_url,
+                };
+
+                let mut new_cards_config: HashMap<String, String> = HashMap::new();
+                if old_config.cards.whitelist.is_empty() {
+                    new_cards_config.insert("default".to_string(), old_config.tachi.api_key);
+                } else {
+                    for card in old_config.cards.whitelist {
+                        new_cards_config.insert(card, old_config.tachi.api_key.clone());
+                    }
+                }
+
+                let new_general_config = GeneralConfig {
+                    export_class: old_config.general.export_class,
+                    fail_over_lamp: old_config.general.fail_over_lamp,
+                    timeout: old_config.general.timeout,
+                    ..Default::default()
+                };
+
+                let new_config = SaekawaConfig {
+                    general: new_general_config,
+                    cards: new_cards_config,
+                    tachi: new_tachi_config,
+                };
+
+                confy::store_path("saekawa.toml", new_config.clone()).context(ConfySnafu)?;
+
+                Ok(new_config)
+            }
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct GeneralConfig {
+    #[serde(default = "default_true")]
+    pub export_class: bool,
+
+    #[serde(default = "default_false")]
+    pub fail_over_lamp: bool,
+
+    #[serde(default = "default_timeout")]
+    pub timeout: u64,
+
+    #[serde(default = "default_false")]
+    pub auto_update: bool,
+
+    #[serde(default = "default_failed_import_dir")]
+    pub failed_import_dir: Option<PathBuf>,
+}
+
+impl Default for GeneralConfig {
+    fn default() -> Self {
+        Self {
+            export_class: true,
+            fail_over_lamp: false,
+            timeout: 5000,
+            auto_update: true,
+            failed_import_dir: PathBuf::from_str("failed_saekawa_imports").ok(),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub struct TachiConfig {
+    #[serde(default = "default_tachi_url")]
+    pub base_url: Url,
+}
+
+impl Default for TachiConfig {
+    fn default() -> Self {
+        Self {
+            base_url: Url::parse("https://kamai.tachi.ac").unwrap(),
+        }
+    }
+}

src/configuration.rs

@@ -1,98 +0,0 @@
-use anyhow::Result;
-use serde::{Deserialize, Serialize};
-use std::fs::File;
-use std::io::Write;
-use std::path::Path;
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct Configuration {
-    pub general: GeneralConfiguration,
-
-    pub cards: CardsConfiguration,
-
-    #[serde(default)]
-    pub crypto: CryptoConfiguration,
-
-    pub tachi: TachiConfiguration,
-}
-
-impl Configuration {
-    pub fn load() -> Result<Self> {
-        if !Path::new("saekawa.toml").exists() {
-            File::create("saekawa.toml")
-                .and_then(|mut file| file.write_all(include_bytes!("../res/saekawa.toml")))
-                .map_err(|err| anyhow::anyhow!("Could not create default config file: {}", err))?;
-        }
-
-        confy::load_path("saekawa.toml")
-            .map_err(|err| anyhow::anyhow!("Could not load config: {}", err))
-    }
-
-    pub fn update(cfg: Configuration) -> Result<()> {
-        confy::store_path("saekawa.toml", cfg)
-            .map_err(|err| anyhow::anyhow!("Could not update config: {}", err))
-    }
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct GeneralConfiguration {
-    #[serde(default = "default_true")]
-    pub enable: bool,
-
-    #[serde(default = "default_true")]
-    pub export_class: bool,
-
-    #[serde(default = "default_false")]
-    pub export_pbs: bool,
-
-    #[serde(default = "default_false")]
-    pub fail_over_lamp: bool,
-
-    #[serde(default = "default_timeout")]
-    pub timeout: u64,
-}
-
-fn default_true() -> bool {
-    true
-}
-
-fn default_false() -> bool {
-    false
-}
-
-fn default_timeout() -> u64 {
-    3000
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct CardsConfiguration {
-    #[serde(default)]
-    pub whitelist: Vec<String>,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct CryptoConfiguration {
-    #[serde(with = "faster_hex::nopfx_lowercase")]
-    pub key: Vec<u8>,
-
-    #[serde(with = "faster_hex::nopfx_lowercase")]
-    pub iv: Vec<u8>,
-
-    #[serde(with = "faster_hex::nopfx_lowercase")]
-    pub salt: Vec<u8>,
-
-    #[serde(default = "default_iterations")]
-    pub iterations: u32,
-}
-
-fn default_iterations() -> u32 {
-    70
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct TachiConfiguration {
-    pub base_url: String,
-    pub status: String,
-    pub import: String,
-    pub api_key: String,
-}

src/handlers.rs

@@ -1,59 +0,0 @@
-use std::{fmt::Debug, sync::atomic::Ordering};
-
-use log::{debug, error, info};
-use serde::de::DeserializeOwned;
-
-use crate::{
-    helpers::execute_tachi_import, saekawa::GAME_MAJOR_VERSION, types::tachi::ToTachiImport,
-    CONFIGURATION,
-};
-
-pub fn score_handler<T>(body: String, guard: impl Fn(&T) -> bool)
-where
-    T: Debug + DeserializeOwned + ToTachiImport,
-{
-    let data = match serde_json::from_str::<T>(body.as_ref()) {
-        Ok(req) => req,
-        Err(err) => {
-            error!("Could not parse request body: {:#}", err);
-            return;
-        }
-    };
-
-    debug!("parsed request body: {:#?}", data);
-
-    if !guard(&data) {
-        return;
-    }
-
-    let import = data.to_tachi_import(
-        GAME_MAJOR_VERSION.load(Ordering::SeqCst),
-        CONFIGURATION.general.export_class,
-        CONFIGURATION.general.fail_over_lamp,
-    );
-
-    if import.scores.is_empty() {
-        if import.classes.is_none() {
-            return;
-        }
-
-        if import
-            .classes
-            .clone()
-            .is_some_and(|v| v.dan.is_none() && v.emblem.is_none())
-        {
-            return;
-        }
-    }
-
-    info!(
-        "Submitting {} scores from {} {}",
-        import.scores.len(),
-        data.displayed_id_type(),
-        data.displayed_id(),
-    );
-
-    if let Err(err) = execute_tachi_import(import) {
-        error!("{:#}", err);
-    }
-}

src/helpers/chuni_encoding.rs

@@ -0,0 +1,66 @@
+use std::io::{self, Read};
+
+use aes::cipher::{block_padding::Pkcs7, BlockDecryptMut, KeyIvInit};
+use flate2::read::ZlibDecoder;
+use pbkdf2::pbkdf2_hmac_array;
+use sha1::Sha1;
+use snafu::prelude::Snafu;
+
+type Aes256CbcDec = cbc::Decryptor<aes::Aes256>;
+
+#[derive(Snafu, Debug)]
+pub enum DecryptError {
+    InvalidLength,
+    UnpadError,
+}
+
+#[derive(Debug)]
+pub struct MaybeDecompressError {
+    pub zlib_error: io::Error,
+    pub raw_error: io::Error,
+}
+
+pub fn hash_endpoint(endpoint: impl AsRef<str>, salt: impl AsRef<[u8]>, rounds: u32) -> String {
+    let key_bytes =
+        pbkdf2_hmac_array::<Sha1, 16>(endpoint.as_ref().as_bytes(), salt.as_ref(), rounds);
+
+    faster_hex::hex_string(&key_bytes)
+}
+
+pub fn decrypt_aes256_cbc(
+    body: &mut [u8],
+    key: impl AsRef<[u8]>,
+    iv: impl AsRef<[u8]>,
+) -> Result<Vec<u8>, DecryptError> {
+    let cipher = Aes256CbcDec::new_from_slices(key.as_ref(), iv.as_ref())
+        .map_err(|_| DecryptError::InvalidLength)?;
+
+    Ok(cipher
+        .decrypt_padded_mut::<Pkcs7>(body)
+        .map_err(|_| DecryptError::UnpadError)?
+        .to_owned())
+}
+
+pub fn maybe_decompress_buffer(buf: impl AsRef<[u8]>) -> Result<String, MaybeDecompressError> {
+    let mut ret = String::with_capacity(buf.as_ref().len() * 2);
+
+    let mut decoder = ZlibDecoder::new(buf.as_ref());
+    let zlib_result = decoder.read_to_string(&mut ret);
+
+    if zlib_result.is_ok() {
+        return Ok(ret);
+    }
+
+    ret.clear();
+
+    let result = buf.as_ref().read_to_string(&mut ret);
+
+    if result.is_ok() {
+        return Ok(ret);
+    }
+
+    Err(MaybeDecompressError {
+        zlib_error: zlib_result.expect_err("must be Err if reached here"),
+        raw_error: result.expect_err("must be Err if reached here"),
+    })
+}

src/helpers/crypto.rs

@@ -1,16 +0,0 @@
-use aes::cipher::{block_padding::Pkcs7, BlockDecryptMut, KeyIvInit};
-use anyhow::{anyhow, Result};
-
-type Aes256CbcDec = cbc::Decryptor<aes::Aes256>;
-
-pub fn decrypt_aes256_cbc(
-    body: &mut [u8],
-    key: impl AsRef<[u8]>,
-    iv: impl AsRef<[u8]>,
-) -> Result<Vec<u8>> {
-    let cipher = Aes256CbcDec::new_from_slices(key.as_ref(), iv.as_ref())?;
-    Ok(cipher
-        .decrypt_padded_mut::<Pkcs7>(body)
-        .map_err(|err| anyhow!(err))?
-        .to_owned())
-}

src/helpers/endpoint.rs

@@ -1,58 +0,0 @@
-use log::debug;
-use pbkdf2::pbkdf2_hmac_array;
-use sha1::Sha1;
-
-use crate::CONFIGURATION;
-
-pub fn is_endpoint(
-    endpoint: &str,
-    unencrypted_variant: &str,
-    encrypted_variant: &Option<String>,
-) -> bool {
-    if endpoint == unencrypted_variant {
-        return true;
-    }
-
-    if encrypted_variant.as_ref().is_some_and(|v| v == endpoint) {
-        return true;
-    }
-
-    return false;
-}
-
-/// Determine if it is an encrypted endpoint by checking if the endpoint
-/// is exactly 32 characters long, and consists of all hex characters.
-///
-/// While this may trigger false positives, this should not happen as long
-/// as CHUNITHM title APIs keep their `{method}{object}Api` endpoint
-/// convention.
-pub fn is_encrypted_endpoint(endpoint: &str) -> bool {
-    if endpoint.len() != 32 {
-        return false;
-    }
-
-    // Lazy way to check if all digits are hexadecimal
-    if u128::from_str_radix(endpoint, 16).is_err() {
-        return false;
-    }
-
-    true
-}
-
-pub fn hash_endpoint(endpoint: &str) -> Option<String> {
-    if CONFIGURATION.crypto.salt.is_empty() {
-        return None;
-    }
-
-    let key_bytes = pbkdf2_hmac_array::<Sha1, 16>(
-        endpoint.as_bytes(),
-        &CONFIGURATION.crypto.salt,
-        CONFIGURATION.crypto.iterations,
-    );
-
-    let key = faster_hex::hex_string(&key_bytes);
-
-    debug!("Running with encryption support: {endpoint} maps to {key}");
-
-    Some(key)
-}

src/helpers/hinternet.rs

@@ -1,114 +0,0 @@
-use std::ptr;
-
-use anyhow::{anyhow, Result};
-use widestring::U16CString;
-use winapi::{
-    ctypes::c_void,
-    shared::{minwindef::TRUE, winerror::ERROR_INSUFFICIENT_BUFFER},
-    um::{
-        errhandlingapi::GetLastError,
-        winhttp::{
-            WinHttpQueryHeaders, WinHttpQueryOption, HINTERNET, WINHTTP_OPTION_URL,
-            WINHTTP_QUERY_FLAG_REQUEST_HEADERS, WINHTTP_QUERY_USER_AGENT,
-        },
-    },
-};
-
-/// Queries a HINTERNET handle for its URL, then return the result.
-pub fn read_hinternet_url(handle: HINTERNET) -> Result<String> {
-    let mut buf_length = 255;
-    let mut buffer = [0u16; 255];
-    let result = unsafe {
-        WinHttpQueryOption(
-            handle,
-            WINHTTP_OPTION_URL,
-            buffer.as_mut_ptr() as *mut c_void,
-            &mut buf_length,
-        )
-    };
-
-    if result == TRUE {
-        let url_str = U16CString::from_vec_truncate(&buffer[..buf_length as usize]);
-        return url_str
-            .to_string()
-            .map_err(|err| anyhow!("Could not decode wide string: {:#}", err));
-    }
-
-    let ec = unsafe { GetLastError() };
-    if ec == ERROR_INSUFFICIENT_BUFFER {
-        let mut buffer = vec![0u16; buf_length as usize];
-        let result = unsafe {
-            WinHttpQueryOption(
-                handle,
-                WINHTTP_OPTION_URL,
-                buffer.as_mut_ptr() as *mut c_void,
-                &mut buf_length,
-            )
-        };
-
-        if result != TRUE {
-            let ec = unsafe { GetLastError() };
-            return Err(anyhow!("Could not get URL from HINTERNET handle: {ec}"));
-        }
-
-        let url_str = U16CString::from_vec_truncate(&buffer[..buf_length as usize]);
-        return url_str
-            .to_string()
-            .map_err(|err| anyhow!("Could not decode wide string: {:#}", err));
-    }
-
-    let ec = unsafe { GetLastError() };
-    Err(anyhow!("Could not get URL from HINTERNET handle: {ec}"))
-}
-
-pub fn read_hinternet_user_agent(handle: HINTERNET) -> Result<String> {
-    let mut buf_length = 255;
-    let mut buffer = [0u16; 255];
-    let result = unsafe {
-        WinHttpQueryHeaders(
-            handle,
-            WINHTTP_QUERY_USER_AGENT | WINHTTP_QUERY_FLAG_REQUEST_HEADERS,
-            ptr::null(),
-            buffer.as_mut_ptr() as *mut c_void,
-            &mut buf_length,
-            ptr::null_mut(),
-        )
-    };
-
-    if result == TRUE {
-        let user_agent_str = U16CString::from_vec_truncate(&buffer[..buf_length as usize]);
-        return user_agent_str
-            .to_string()
-            .map_err(|err| anyhow!("Could not decode wide string: {:#}", err));
-    }
-
-    let ec = unsafe { GetLastError() };
-    if ec == ERROR_INSUFFICIENT_BUFFER {
-        let mut buffer = vec![0u16; buf_length as usize];
-        let result = unsafe {
-            WinHttpQueryHeaders(
-                handle,
-                WINHTTP_QUERY_USER_AGENT | WINHTTP_QUERY_FLAG_REQUEST_HEADERS,
-                ptr::null(),
-                buffer.as_mut_ptr() as *mut c_void,
-                &mut buf_length,
-                ptr::null_mut(),
-            )
-        };
-
-        if result != TRUE {
-            let ec = unsafe { GetLastError() };
-            return Err(anyhow!("Could not get URL from HINTERNET handle: {ec}"));
-        }
-
-        let user_agent_str = U16CString::from_vec_truncate(&buffer[..buf_length as usize]);
-        return user_agent_str
-            .to_string()
-            .map_err(|err| anyhow!("Could not decode wide string: {:#}", err));
-    }
-
-    let ec = unsafe { GetLastError() };
-    Err(anyhow!(
-        "Could not get User-Agent from HINTERNET handle: {ec}"
-    ))
-}

src/helpers/io.rs

@@ -1,35 +0,0 @@
-use std::io::Read;
-
-use anyhow::{anyhow, Result};
-use flate2::read::ZlibDecoder;
-
-pub fn read_slice(buf: *const u8, len: usize) -> Result<Vec<u8>> {
-    let mut slice = unsafe { std::slice::from_raw_parts(buf, len) };
-    let mut ret = Vec::with_capacity(len);
-
-    slice.read_to_end(&mut ret)?;
-
-    Ok(ret)
-}
-
-pub fn read_maybe_compressed_buffer(buf: impl AsRef<[u8]>) -> Result<String> {
-    let mut ret = String::new();
-
-    let mut decoder = ZlibDecoder::new(buf.as_ref());
-    let zlib_result = decoder.read_to_string(&mut ret);
-    if zlib_result.is_ok() {
-        return Ok(ret);
-    }
-
-    ret.clear();
-    let result = buf.as_ref().read_to_string(&mut ret);
-    if result.is_ok() {
-        return Ok(ret);
-    }
-
-    Err(anyhow!(
-        "Could not decode contents of buffer as both DEFLATE-compressed ({:#}) and plaintext ({:#}) UTF-8 string.",
-        zlib_result.expect_err("This shouldn't happen, if Result was Ok the string should have been returned earlier."),
-        result.expect_err("This shouldn't happen, if Result was Ok the string should have been returned earlier."),
-    ))
-}

src/helpers/mod.rs

@@ -1,11 +1,2 @@
-mod crypto;
-mod endpoint;
-mod hinternet;
-mod io;
-mod net;
-
-pub use crypto::*;
-pub use endpoint::*;
-pub use hinternet::*;
-pub use io::*;
-pub use net::*;
+pub mod chuni_encoding;
+pub mod winapi_ext;

src/helpers/net.rs

@@ -1,140 +0,0 @@
-use std::fmt::Debug;
-
-use anyhow::{anyhow, Result};
-use log::{debug, error, info};
-use serde::{Deserialize, Serialize};
-
-use crate::{
-    types::tachi::{Import, ImportDocument, ImportPollStatus, ImportResponse, TachiResponse},
-    CONFIGURATION, TACHI_IMPORT_URL,
-};
-
-pub fn request_agent() -> ureq::Agent {
-    let timeout = CONFIGURATION.general.timeout;
-    let timeout = if timeout > 10000 { 10000 } else { timeout };
-
-    ureq::builder()
-        .timeout(std::time::Duration::from_millis(timeout))
-        .build()
-}
-
-fn request<T>(
-    method: impl AsRef<str>,
-    url: impl AsRef<str>,
-    body: Option<T>,
-) -> Result<ureq::Response>
-where
-    T: Serialize + Debug,
-{
-    let agent = request_agent();
-
-    let method = method.as_ref();
-    let url = url.as_ref();
-    debug!("{} request to {} with body: {:#?}", method, url, body);
-
-    let authorization = format!("Bearer {}", CONFIGURATION.tachi.api_key);
-    let request = agent
-        .request(method, url)
-        .set("Authorization", authorization.as_str());
-    let response = match body {
-        Some(body) => request.send_json(body),
-        None => request.call(),
-    }
-    .map_err(|err| anyhow::anyhow!("Could not reach Tachi API: {:#}", err))?;
-
-    Ok(response)
-}
-
-pub fn request_tachi<T, R>(
-    method: impl AsRef<str>,
-    url: impl AsRef<str>,
-    body: Option<T>,
-) -> Result<R>
-where
-    T: Serialize + Debug,
-    R: for<'de> Deserialize<'de> + Debug,
-{
-    let response = request(method, url, body)?;
-    let response = response.into_json()?;
-    debug!("Tachi API response: {:#?}", response);
-
-    Ok(response)
-}
-
-fn log_import(description: &str, import: ImportDocument) {
-    info!(
-        "{description} {} scores, {} sessions, {} errors",
-        import.score_ids.len(),
-        import.created_sessions.len(),
-        import.errors.len()
-    );
-
-    for err in import.errors {
-        error!("{}: {}", err.error_type, err.message);
-    }
-}
-
-/// Executes a DIRECT-MANUAL import and logs some information on success.
-///
-/// ## Important
-/// This function blocks until import has fully finished! It is best to call this in a separate thread.
-pub fn execute_tachi_import(import: Import) -> Result<()> {
-    let resp: TachiResponse<ImportResponse> =
-        match request_tachi("POST", TACHI_IMPORT_URL.as_str(), Some(import)) {
-            Err(err) => {
-                return Err(anyhow!("Could not send scores to Tachi: {:#}", err));
-            }
-            Ok(resp) => resp,
-        };
-
-    let (body, description) = match resp {
-        TachiResponse::Err(err) => {
-            return Err(anyhow!(
-                "Tachi API returned an error: {:#}",
-                err.description
-            ));
-        }
-        TachiResponse::Ok(resp) => (resp.body, resp.description),
-    };
-
-    let poll_url = match body {
-        ImportResponse::Queued { url, import_id: _ } => {
-            info!("Queued import for processing. Status URL: {}", url);
-            url
-        }
-        ImportResponse::Finished(import) => {
-            log_import(&description, import);
-            return Ok(());
-        }
-    };
-
-    loop {
-        let resp: TachiResponse<ImportPollStatus> =
-            match request_tachi("GET", &poll_url, None::<()>) {
-                Ok(resp) => resp,
-                Err(err) => {
-                    error!("Could not poll import status: {:#}", err);
-                    break;
-                }
-            };
-
-        let (body, description) = match resp {
-            TachiResponse::Ok(resp) => (resp.body, resp.description),
-            TachiResponse::Err(err) => {
-                return Err(anyhow!("Tachi API returned an error: {}", err.description));
-            }
-        };
-
-        match body {
-            ImportPollStatus::Completed { import } => {
-                log_import(&description, import);
-                return Ok(());
-            }
-            _ => {}
-        }
-
-        std::thread::sleep(std::time::Duration::from_secs(1));
-    }
-
-    Ok(())
-}

src/helpers/winapi_ext.rs

@@ -0,0 +1,99 @@
+use snafu::prelude::Snafu;
+use widestring::U16CString;
+use winapi::{
+    ctypes::c_void,
+    shared::{
+        minwindef::{HINSTANCE, HMODULE, TRUE},
+        winerror::ERROR_INSUFFICIENT_BUFFER,
+    },
+    um::{
+        errhandlingapi::GetLastError,
+        libloaderapi::{FreeLibraryAndExitThread, GetModuleFileNameW},
+        winhttp::{WinHttpQueryOption, HINTERNET},
+    },
+};
+
+pub struct LibraryHandle(HINSTANCE);
+
+unsafe impl Send for LibraryHandle {}
+unsafe impl Sync for LibraryHandle {}
+impl LibraryHandle {
+    pub unsafe fn new(handle: HINSTANCE) -> Self {
+        Self(handle)
+    }
+
+    pub fn handle(&self) -> HINSTANCE {
+        self.0
+    }
+
+    pub fn free_and_exit_thread(self, code: u32) -> ! {
+        unsafe {
+            FreeLibraryAndExitThread(self.0, code);
+        }
+        unreachable!()
+    }
+}
+
+#[derive(Debug, Snafu)]
+pub enum ReadStringFnError {
+    InvalidData,
+    Other { errno: u32 },
+}
+
+pub fn read_string_from_function_call(
+    reader: impl Fn(&mut [u16], &mut u32) -> i32,
+    is_success: impl Fn(i32) -> bool,
+) -> Result<String, ReadStringFnError> {
+    let mut buffer = vec![0u16; 255];
+    let mut buffer_length = 255;
+    let result = reader(&mut buffer, &mut buffer_length);
+
+    if is_success(result) {
+        let out = U16CString::from_vec_truncate(&buffer[..buffer_length as usize]);
+
+        return out.to_string().map_err(|_| ReadStringFnError::InvalidData);
+    }
+
+    let errno = unsafe { GetLastError() };
+
+    if errno == ERROR_INSUFFICIENT_BUFFER {
+        buffer.resize(buffer_length as usize, 0);
+        let result = reader(&mut buffer, &mut buffer_length);
+
+        if result != TRUE {
+            let errno = unsafe { GetLastError() };
+
+            return Err(ReadStringFnError::Other { errno });
+        }
+
+        let out = U16CString::from_vec_truncate(&buffer[..buffer_length as usize]);
+
+        return out.to_string().map_err(|_| ReadStringFnError::InvalidData);
+    }
+
+    Err(ReadStringFnError::Other { errno })
+}
+
+pub fn winhttp_query_option(handle: HINTERNET, option: u32) -> Result<String, ReadStringFnError> {
+    read_string_from_function_call(
+        |buf, buflen| unsafe {
+            WinHttpQueryOption(handle, option, buf.as_mut_ptr() as *mut c_void, buflen)
+        },
+        |ret| ret == TRUE,
+    )
+}
+
+pub fn get_module_file_name(handle: HMODULE) -> Result<String, ReadStringFnError> {
+    read_string_from_function_call(
+        |buf, buflen| unsafe {
+            let ret = GetModuleFileNameW(handle, buf.as_mut_ptr(), *buflen) as i32;
+
+            if GetLastError() == ERROR_INSUFFICIENT_BUFFER {
+                *buflen = 32767;
+            }
+
+            ret
+        },
+        |_| unsafe { GetLastError() != ERROR_INSUFFICIENT_BUFFER },
+    )
+}

src/icf.rs

@@ -1,245 +0,0 @@
-use std::fmt::Display;
-
-use aes::cipher::{block_padding::NoPadding, BlockDecryptMut, KeyIvInit};
-use anyhow::{anyhow, Result};
-use binary_reader::{BinaryReader, Endian};
-use chrono::{NaiveDate, NaiveDateTime};
-
-type Aes128CbcDec = cbc::Decryptor<aes::Aes128>;
-
-const ICF_KEY: [u8; 16] = hex_literal::decode(&[env!("SAEKAWA_ICF_KEY").as_bytes()]);
-const ICF_IV: [u8; 16] = hex_literal::decode(&[env!("SAEKAWA_ICF_IV").as_bytes()]);
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Version {
-    pub major: u16,
-    pub minor: u8,
-    pub build: u8,
-}
-
-impl Display for Version {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}.{:0>2}.{:0>2}", self.major, self.minor, self.build)
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct IcfInnerData {
-    pub id: String,
-    pub version: Version,
-    pub required_system_version: Version,
-    pub datetime: NaiveDateTime,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct IcfPatchData {
-    pub id: String,
-    pub source_version: Version,
-    pub target_version: Version,
-    pub required_system_version: Version,
-    pub datetime: NaiveDateTime,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum IcfData {
-    System(IcfInnerData),
-    App(IcfInnerData),
-    Patch(IcfPatchData),
-    Option(IcfInnerData),
-}
-
-fn decrypt_icf(data: &mut [u8], key: impl AsRef<[u8]>, iv: impl AsRef<[u8]>) -> Result<Vec<u8>> {
-    let size = data.len();
-
-    let mut decrypted = Vec::with_capacity(size);
-
-    for i in (0..size).step_by(4096) {
-        let from_start = i;
-
-        let bufsz = std::cmp::min(4096, size - from_start);
-        let buf = &data[i..i + bufsz];
-        let mut decbuf = vec![0; bufsz];
-
-        let cipher = Aes128CbcDec::new_from_slices(key.as_ref(), iv.as_ref())?;
-        cipher
-            .decrypt_padded_b2b_mut::<NoPadding>(buf, &mut decbuf)
-            .map_err(|err| anyhow!(err))?;
-
-        let xor1 = u64::from_le_bytes(decbuf[0..8].try_into()?) ^ (from_start as u64);
-        let xor2 = u64::from_le_bytes(decbuf[8..16].try_into()?) ^ (from_start as u64);
-
-        decrypted.extend(xor1.to_le_bytes());
-        decrypted.extend(xor2.to_le_bytes());
-        decrypted.extend(&decbuf[16..]);
-    }
-
-    Ok(decrypted)
-}
-
-pub fn decode_icf_container_data(
-    rd: &mut BinaryReader,
-) -> Result<(Version, NaiveDateTime, Version)> {
-    let version = Version {
-        build: rd.read_u8()?,
-        minor: rd.read_u8()?,
-        major: rd.read_u16()?,
-    };
-
-    let datetime = NaiveDate::from_ymd_opt(
-        rd.read_i16()? as i32,
-        rd.read_u8()? as u32,
-        rd.read_u8()? as u32,
-    )
-    .ok_or(anyhow!("Invalid date"))?
-    .and_hms_milli_opt(
-        rd.read_u8()? as u32,
-        rd.read_u8()? as u32,
-        rd.read_u8()? as u32,
-        rd.read_u8()? as u32,
-    )
-    .ok_or(anyhow!("Invalid time"))?;
-
-    let required_system_version = Version {
-        build: rd.read_u8()?,
-        minor: rd.read_u8()?,
-        major: rd.read_u16()?,
-    };
-
-    Ok((version, datetime, required_system_version))
-}
-
-pub fn decode_icf(data: &mut [u8]) -> Result<Vec<IcfData>> {
-    let decrypted = decrypt_icf(data, ICF_KEY, ICF_IV)?;
-
-    let mut rd = BinaryReader::from_vec(&decrypted);
-    rd.endian = Endian::Little;
-
-    let checksum = crc32fast::hash(&decrypted[4..]);
-    let reported_crc = rd.read_u32()?;
-    if reported_crc != checksum {
-        return Err(anyhow!(
-            "Reported CRC32 ({reported_crc:02X}) does not match actual checksum ({checksum:02X})"
-        ));
-    }
-
-    let reported_size = rd.read_u32()? as usize;
-    let actual_size = decrypted.len();
-    if actual_size != reported_size {
-        return Err(anyhow!(
-            "Reported size {reported_size} does not match actual size {actual_size}"
-        ));
-    }
-
-    let padding = rd.read_u64()?;
-    if padding != 0 {
-        return Err(anyhow!("Padding error. Expected 8 NULL bytes."));
-    }
-
-    let entry_count: usize = rd.read_u64()?.try_into()?;
-    let expected_size = 0x40 * (entry_count + 1);
-    if actual_size != expected_size {
-        return Err(anyhow!("Expected size {expected_size} ({entry_count} entries) does not match actual size {actual_size}"));
-    }
-
-    let app_id = String::from_utf8(rd.read_bytes(4)?.to_vec())?;
-    let platform_id = String::from_utf8(rd.read_bytes(3)?.to_vec())?;
-    let _platform_generation = rd.read_u8()?;
-
-    let reported_crc = rd.read_u32()?;
-    let mut checksum = 0;
-    for i in 1..=entry_count {
-        let container = &decrypted[0x40 * i..0x40 * (i + 1)];
-        if container[0] == 2 && container[1] == 1 {
-            checksum ^= crc32fast::hash(container);
-        }
-    }
-
-    if reported_crc != checksum {
-        return Err(anyhow!("Reported container CRC32 ({reported_crc:02X}) does not match actual checksum ({checksum:02X})"));
-    }
-
-    for _ in 0..7 {
-        if rd.read_u32()? != 0 {
-            return Err(anyhow!("Padding error. Expected 28 NULL bytes."));
-        }
-    }
-
-    let mut entries: Vec<IcfData> = Vec::with_capacity(entry_count);
-    for _ in 0..entry_count {
-        let sig = rd.read_u32()?;
-
-        if sig != 0x0102 && sig != 0x0201 {
-            return Err(anyhow!("Container does not start with signature (0x0102)"));
-        }
-
-        let container_type = rd.read_u32()?;
-        for _ in 0..3 {
-            if rd.read_u64()? != 0 {
-                return Err(anyhow!("Padding error. Expected 24 NULL bytes."));
-            }
-        }
-
-        let data: IcfData = match container_type {
-            0x0000 | 0x0001 | 0x0002 => {
-                let (version, datetime, required_system_version) =
-                    decode_icf_container_data(&mut rd)?;
-
-                for _ in 0..2 {
-                    if rd.read_u64()? != 0 {
-                        return Err(anyhow!("Padding error. Expected 16 NULL bytes."));
-                    }
-                }
-
-                match container_type {
-                    0x0000 => IcfData::System(IcfInnerData {
-                        id: platform_id.clone(),
-                        version,
-                        datetime,
-                        required_system_version,
-                    }),
-                    0x0001 => IcfData::App(IcfInnerData {
-                        id: app_id.clone(),
-                        version,
-                        datetime,
-                        required_system_version,
-                    }),
-                    0x0002 => IcfData::Option(IcfInnerData {
-                        id: app_id.clone(),
-                        version,
-                        datetime,
-                        required_system_version,
-                    }),
-                    _ => unreachable!(),
-                }
-            }
-            _ => {
-                // PATCH container type also encode the patch's sequence number
-                // in the higher 16 bits.
-                // The lower 16 bits will always be 1.
-                let sequence_number = (container_type >> 8) as u8;
-
-                if (container_type & 1) == 0 || sequence_number == 0 {
-                    println!("Unknown ICF container type {container_type:#06x} at byte {:#06x}, skipping", rd.pos);
-                    rd.read_bytes(32)?;
-                    continue;
-                }
-
-                let (target_version, target_datetime, _) = decode_icf_container_data(&mut rd)?;
-                let (source_version, _, source_required_system_version) =
-                    decode_icf_container_data(&mut rd)?;
-
-                IcfData::Patch(IcfPatchData {
-                    id: app_id.clone(),
-                    source_version,
-                    target_version,
-                    required_system_version: source_required_system_version,
-                    datetime: target_datetime,
-                })
-            }
-        };
-
-        entries.push(data);
-    }
-
-    Ok(entries)
-}

src/lib.rs

@@ -1,111 +1,26 @@
-mod configuration;
-mod handlers;
+mod config;
 mod helpers;
-mod icf;
-mod log;
+mod logging;
 mod saekawa;
+mod score_import;
+mod sigscan;
 mod types;
+mod updater;
 
-use std::ffi::c_void;
-use std::{ptr, thread};
+use std::thread;
 
-use ::log::{error, warn};
-use lazy_static::lazy_static;
-use url::Url;
-use winapi::shared::minwindef::{BOOL, DWORD, FALSE, HINSTANCE, LPVOID, TRUE};
-use winapi::um::errhandlingapi::GetLastError;
-use winapi::um::handleapi::{CloseHandle, DuplicateHandle};
-use winapi::um::processthreadsapi::{GetCurrentProcess, GetCurrentThread};
-use winapi::um::synchapi::WaitForSingleObject;
-use winapi::um::winnt::{DLL_PROCESS_ATTACH, DLL_PROCESS_DETACH, SYNCHRONIZE};
+use log::{error, info, warn};
+use winapi::{
+    shared::minwindef::{BOOL, DWORD, HINSTANCE, LPVOID, TRUE},
+    um::winnt::{DLL_PROCESS_ATTACH, DLL_PROCESS_DETACH},
+};
 
-use crate::configuration::Configuration;
-use crate::helpers::hash_endpoint;
-use crate::log::Logger;
-use crate::saekawa::{hook_init, hook_release};
-
-lazy_static! {
-    pub static ref CONFIGURATION: Configuration = {
-        let result = Configuration::load();
-        if let Err(err) = result {
-            error!("{:#}", err);
-            std::process::exit(1);
-        }
-
-        result.unwrap()
-    };
-    pub static ref TACHI_STATUS_URL: String = {
-        let result = Url::parse(&CONFIGURATION.tachi.base_url)
-            .and_then(|url| url.join(&CONFIGURATION.tachi.status));
-        if let Err(err) = result {
-            error!("Could not parse Tachi status URL: {:#}", err);
-            std::process::exit(1);
-        }
-
-        result.unwrap().to_string()
-    };
-    pub static ref TACHI_IMPORT_URL: String = {
-        let result = Url::parse(&CONFIGURATION.tachi.base_url)
-            .and_then(|url| url.join(&CONFIGURATION.tachi.import));
-        if let Err(err) = result {
-            error!("Could not parse Tachi import URL: {:#}", err);
-            std::process::exit(1);
-        }
-
-        result.unwrap().to_string()
-    };
-    pub static ref UPSERT_USER_ALL_API_ENCRYPTED: Option<String> =
-        hash_endpoint("UpsertUserAllApi");
-    pub static ref GET_USER_MUSIC_API_ENCRYPTED: Option<String> = hash_endpoint("GetUserMusicApi");
-}
-
-fn init_logger() {
-    env_logger::builder()
-        .filter_level(::log::LevelFilter::Error)
-        .filter_module(
-            "saekawa",
-            if cfg!(debug_assertions) {
-                ::log::LevelFilter::Debug
-            } else {
-                ::log::LevelFilter::Info
-            },
-        )
-        .parse_default_env()
-        .target(env_logger::Target::Pipe(Box::new(Logger::new())))
-        .format(|f, record| {
-            use crate::log::{colored_level, max_target_width, Padded};
-            use std::io::Write;
-
-            let target = record.target();
-            let max_width = max_target_width(target);
-
-            let mut style = f.style();
-            let level = colored_level(&mut style, record.level());
-
-            let mut style = f.style();
-            let target = style.set_bold(true).value(Padded {
-                value: target,
-                width: max_width,
-            });
-
-            let time = chrono::Local::now().format("%d/%m/%Y %H:%M:%S");
-
-            writeln!(f, "[{}] {} {} -> {}", time, level, target, record.args())
-        })
-        .init();
-}
-
-struct ThreadHandle(*mut c_void);
-
-impl ThreadHandle {
-    pub unsafe fn wait_and_close(self, ms: u32) {
-        WaitForSingleObject(self.0, ms);
-        CloseHandle(self.0);
-    }
-}
-
-unsafe impl Send for ThreadHandle {}
-unsafe impl Sync for ThreadHandle {}
+use crate::{
+    helpers::winapi_ext::LibraryHandle,
+    logging::init_logger,
+    saekawa::{hook_init, hook_release},
+    updater::self_update,
+};
 
 #[no_mangle]
 #[allow(non_snake_case, unused_variables)]
@@ -114,42 +29,36 @@ extern "system" fn DllMain(dll_module: HINSTANCE, call_reason: DWORD, reserved:
         DLL_PROCESS_ATTACH => {
             init_logger();
 
-            let (cur_thread, result) = unsafe {
-                let mut cur_thread = ptr::null_mut();
-                let result = DuplicateHandle(
-                    GetCurrentProcess(),
-                    GetCurrentThread(),
-                    GetCurrentProcess(),
-                    &mut cur_thread,
-                    SYNCHRONIZE,
-                    FALSE,
-                    0,
-                );
-
-                if result == 0 {
-                    warn!(
-                        "Failed to get current thread handle, error code: {}",
-                        GetLastError()
-                    );
-                }
-
-                (ThreadHandle(cur_thread), result)
-            };
+            let library_handle = unsafe { LibraryHandle::new(dll_module) };
 
             thread::spawn(move || {
-                if result != 0 {
-                    unsafe { cur_thread.wait_and_close(100) };
+                info!(
+                    "saekawa {} ({}@{}) starting up...",
+                    env!("CARGO_PKG_VERSION"),
+                    &env!("VERGEN_GIT_SHA")[0..7],
+                    env!("VERGEN_GIT_BRANCH"),
+                );
+
+                match self_update(&library_handle) {
+                    Ok(should_reboot) => {
+                        if should_reboot {
+                            info!("Self-update successful. Reloading into new hook...");
+                            library_handle.free_and_exit_thread(1);
+                        }
+                    }
+                    Err(e) => {
+                        error!("Self-update failed: {e:#}");
+                    }
                 }
 
-                if let Err(err) = hook_init() {
-                    error!("Failed to initialize hook: {:#}", err);
+                if let Err(e) = hook_init() {
+                    error!("Failed to initialize hook: {e:#}");
                 }
             });
         }
         DLL_PROCESS_DETACH => {
-            if let Err(err) = hook_release() {
-                error!("{:#}", err);
-                return FALSE;
+            if let Err(e) = hook_release() {
+                warn!("Failed to release hook: {e:#}")
             }
         }
         _ => {}

src/log.rs

@@ -1,81 +0,0 @@
-use std::ffi::CString;
-use std::fmt;
-use std::fs::File;
-use std::io::Write;
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-use winapi::um::debugapi::OutputDebugStringA;
-
-#[derive(Debug)]
-pub struct Logger {
-    file: File,
-}
-
-impl Logger {
-    pub fn new() -> Self {
-        Self {
-            file: File::create("saekawa.log").unwrap(),
-        }
-    }
-}
-
-impl Write for Logger {
-    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        if let Ok(c_str) = CString::new(buf) {
-            unsafe {
-                OutputDebugStringA(c_str.as_ptr());
-            }
-        }
-
-        let _ = std::io::stdout().write(buf);
-        self.file.write(buf)
-    }
-
-    fn flush(&mut self) -> std::io::Result<()> {
-        // Ignore the result of the write to stdout, since it's not really important
-        let _ = std::io::stdout().flush();
-        self.file.flush()
-    }
-}
-
-pub(crate) struct Padded<T> {
-    pub(crate) value: T,
-    pub(crate) width: usize,
-}
-
-impl<T: fmt::Display> fmt::Display for Padded<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{: <width$}", self.value, width = self.width)
-    }
-}
-
-pub(crate) static MAX_MODULE_WIDTH: AtomicUsize = AtomicUsize::new(0);
-
-pub(crate) fn max_target_width(target: &str) -> usize {
-    let max_width = MAX_MODULE_WIDTH.load(Ordering::Relaxed);
-    if max_width < target.len() {
-        MAX_MODULE_WIDTH.store(target.len(), Ordering::Relaxed);
-        target.len()
-    } else {
-        max_width
-    }
-}
-
-pub(crate) fn colored_level(
-    style: &mut env_logger::fmt::Style,
-    level: log::Level,
-) -> env_logger::fmt::StyledValue<&'static str> {
-    match level {
-        log::Level::Trace => style
-            .set_color(env_logger::fmt::Color::Magenta)
-            .value("TRACE"),
-        log::Level::Debug => style.set_color(env_logger::fmt::Color::Blue).value("DEBUG"),
-        log::Level::Info => style
-            .set_color(env_logger::fmt::Color::Green)
-            .value(" INFO"),
-        log::Level::Warn => style
-            .set_color(env_logger::fmt::Color::Yellow)
-            .value(" WARN"),
-        log::Level::Error => style.set_color(env_logger::fmt::Color::Red).value("ERROR"),
-    }
-}

src/logging.rs

@@ -0,0 +1,61 @@
+use std::{ffi::CString, fs::File, io::Write};
+
+use winapi::um::{debugapi::OutputDebugStringA, wincon::GetConsoleWindow};
+
+#[derive(Debug)]
+struct Logger {
+    file: File,
+    has_console_output: bool,
+}
+
+impl Logger {
+    pub fn new() -> Self {
+        Self {
+            file: File::create("saekawa.log").unwrap(),
+            has_console_output: unsafe { !GetConsoleWindow().is_null() },
+        }
+    }
+}
+
+impl Write for Logger {
+    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
+        if self.has_console_output {
+            let _ = std::io::stdout().write(buf);
+        } else if let Ok(c_str) = CString::new(buf) {
+            unsafe {
+                OutputDebugStringA(c_str.as_ptr());
+            }
+        }
+
+        self.file.write(buf)
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        // Ignore the result of the write to stdout, since it's not really important
+        let _ = std::io::stdout().flush();
+        self.file.flush()
+    }
+}
+
+pub fn init_logger() {
+    env_logger::builder()
+        .filter_module(
+            "saekawa",
+            if cfg!(debug_assertions) {
+                log::LevelFilter::Debug
+            } else {
+                log::LevelFilter::Info
+            },
+        )
+        .parse_default_env()
+        .target(env_logger::Target::Pipe(Box::new(Logger::new())))
+        .format(|f, record| {
+            let target = record.target();
+            let level = record.level();
+            let args = record.args();
+            let time = chrono::Local::now().format("%Y-%m-%d %H:%M:%S");
+
+            writeln!(f, "{time} {level:<5} [{target}] {args}")
+        })
+        .init();
+}

src/saekawa.rs

@@ -1,331 +1,228 @@
 use std::{
-    fmt::Debug,
-    fs::File,
-    io::Read,
-    path::Path,
-    sync::atomic::{AtomicBool, AtomicU16, Ordering},
+    io::{self, Read},
+    mem::{self, MaybeUninit},
+    num::ParseIntError,
+    ptr,
+    sync::OnceLock,
+    thread,
 };
 
-use ::log::{debug, error, info};
-use anyhow::{anyhow, Result};
-use log::warn;
-use serde::de::DeserializeOwned;
-use widestring::U16CString;
+use ini::Ini;
+use log::{debug, error, info};
+use snafu::{prelude::Snafu, ResultExt};
 use winapi::{
-    ctypes::c_void,
-    shared::minwindef::{BOOL, DWORD, FALSE, LPCVOID, LPDWORD, LPVOID, MAX_PATH},
-    um::{errhandlingapi::GetLastError, winbase::GetPrivateProfileStringW, winhttp::HINTERNET},
+    shared::minwindef::{BOOL, DWORD, LPCVOID, LPDWORD},
+    um::{
+        errhandlingapi::GetLastError,
+        libloaderapi::GetModuleHandleW,
+        processthreadsapi::GetCurrentProcess,
+        psapi::{GetModuleInformation, MODULEINFO},
+        winhttp::{HINTERNET, WINHTTP_OPTION_URL},
+    },
 };
 
 use crate::{
-    configuration::{Configuration, GeneralConfiguration},
-    handlers::score_handler,
+    config::{ConfigLoadError, SaekawaConfig},
     helpers::{
-        decrypt_aes256_cbc, is_encrypted_endpoint, is_endpoint, read_hinternet_url,
-        read_hinternet_user_agent, read_maybe_compressed_buffer, read_slice, request_tachi,
+        chuni_encoding::{decrypt_aes256_cbc, hash_endpoint, maybe_decompress_buffer},
+        winapi_ext::{winhttp_query_option, ReadStringFnError},
     },
-    icf::{decode_icf, IcfData},
-    types::{
-        game::{UpsertUserAllRequest, UserMusicResponse},
-        tachi::{StatusCheck, TachiResponse, ToTachiImport},
-    },
-    CONFIGURATION, GET_USER_MUSIC_API_ENCRYPTED, TACHI_STATUS_URL, UPSERT_USER_ALL_API_ENCRYPTED,
+    score_import::execute_score_import,
+    sigscan::{self, CryptoKeys},
+    types::{chuni::UpsertUserAllRequest, ToBatchManual},
 };
 
-pub static GAME_MAJOR_VERSION: AtomicU16 = AtomicU16::new(0);
-pub static PB_IMPORTED: AtomicBool = AtomicBool::new(true);
+#[derive(Debug, Snafu)]
+pub enum HookError {
+    #[snafu(display("Could not load configuration"))]
+    ConfigError { source: ConfigLoadError },
 
-pub fn hook_init() -> Result<()> {
-    if !CONFIGURATION.general.enable {
-        return Ok(());
+    #[snafu(display("No cards were configured in the [cards] section. There is nothing to export to. Add tokens under the cards section with the format `\"access_code\" = \"tachi_api_key\"`. If you wish to export scores from all cards, use `default` in place of an access code."))]
+    NoCardsError,
+
+    #[snafu(display("An error occured hooking the underlying functions"))]
+    CrochetError { source: crochet::detour::Error },
+
+    #[snafu(display("The game version specified in project.conf is not a number."))]
+    InvalidVersion { source: ParseIntError },
+
+    #[snafu(display("An error occured parsing project.conf"))]
+    IniError { source: ini::Error },
+
+    #[snafu(display("An error occured calling a Win32 function: {errno}"))]
+    Win32Error { errno: u32 },
+
+    #[snafu(display("Could not find a pattern in the game executable"))]
+    CryptoScanError { source: sigscan::CryptoScanError },
+
+    #[snafu(display("The configured path for failed import exists and is not a directory."))]
+    FailedImportNotDir,
+
+    #[snafu(display("Could not create the configured directory for failed imports."))]
+    FailedCreatingFailedImportDir { source: io::Error },
+}
+
+#[derive(Debug, Snafu)]
+pub enum ProcessRequestError {
+    #[snafu(display("Could not read URL from HINTERNET handle"))]
+    UrlReadError { source: ReadStringFnError },
+
+    #[snafu(display("The URL does not have an endpoint"))]
+    UrlMissingEndpointError,
+
+    #[snafu(display(
+        "Hooked function was called before all necessary state has been initialized"
+    ))]
+    UninitializedError,
+
+    #[snafu(display("Could not read request body"))]
+    ReadBodyError { source: io::Error },
+}
+
+#[derive(Debug, Clone)]
+struct GameInformation {
+    pub game_id: String,
+    pub major: u16,
+    pub minor: u8,
+    pub build: u8,
+}
+
+/// This is used by the Tachi <-> CHUNITHM conversion functions,
+/// because some enum indexes changed between CHUNITHM and CHUNITHM NEW,
+/// namely difficulty, and later on, clear lamps.
+static GAME_MAJOR_VERSION: OnceLock<u16> = OnceLock::new();
+static CRYPTO_KEYS: OnceLock<CryptoKeys> = OnceLock::new();
+static UPSERT_USER_ALL_API: OnceLock<String> = OnceLock::new();
+
+static CONFIG: OnceLock<SaekawaConfig> = OnceLock::new();
+
+pub fn hook_init() -> Result<(), HookError> {
+    info!("Reading hook configuration");
+    let config = SaekawaConfig::load().context(ConfigSnafu)?;
+
+    if config.cards.is_empty() {
+        return Err(HookError::NoCardsError);
     }
 
-    if CONFIGURATION.general.export_pbs {
-        warn!("===============================================================================");
-        warn!("Exporting PBs is enabled. This should only be used once to sync up your scores!");
-        warn!("Leaving it on can make your profile messy! This will be automatically be turned off after exporting is finished.");
-        warn!("You can check when it's done by searching for the message 'Submitting x scores from user ID xxxxx'.");
-        warn!("===============================================================================");
+    info!("Loaded tokens for {} access codes", config.cards.len());
 
-        PB_IMPORTED.store(false, Ordering::SeqCst);
+    if let Some(d) = &config.general.failed_import_dir {
+        if d.exists() && !d.is_dir() {
+            return Err(HookError::FailedImportNotDir);
         }
 
-    debug!("Retrieving AMFS path from segatools.ini");
+        if !d.exists() {
+            std::fs::create_dir_all(d).context(FailedCreatingFailedImportDirSnafu)?;
+        }
+    }
 
-    let mut buf = [0u16; MAX_PATH];
-    let amfs_cfg = unsafe {
-        let sz = GetPrivateProfileStringW(
-            U16CString::from_str_unchecked("vfs").as_ptr(),
-            U16CString::from_str_unchecked("amfs").as_ptr(),
-            U16CString::new().as_ptr(),
-            buf.as_mut_ptr(),
-            MAX_PATH as u32,
-            U16CString::from_str(".\\segatools.ini").unwrap().as_ptr(),
+    CONFIG
+        .set(config)
+        .expect("OnceLock shouldn't be initialized.");
+
+    debug!("Reading version information from project.conf");
+    let info = get_project_conf()?;
+
+    info!(
+        "Running on {} {}.{}.{}",
+        info.game_id, info.major, info.minor, info.build
     );
 
-        if sz == 0 {
-            let ec = GetLastError();
-            return Err(anyhow!(
-                "AMFS path not specified in segatools.ini, error code {ec}"
-            ));
-        }
+    let ver = determine_major_version(&info);
 
-        match U16CString::from_ptr(buf.as_ptr(), sz as usize) {
-            Ok(data) => data.to_string_lossy(),
-            Err(err) => {
-                return Err(anyhow!(
-                    "could not read AMFS path from segatools.ini: {:#}",
-                    err
-                ));
-            }
-        }
-    };
-    let amfs_path = Path::new(&amfs_cfg);
-    let icf1_path = amfs_path.join("ICF1");
+    debug!("Game's major version is {ver}");
 
-    if !icf1_path.exists() {
-        return Err(anyhow!("Could not find ICF1 inside AMFS path. You will probably not be able to network without this file, so this hook will also be disabled."));
-    }
+    GAME_MAJOR_VERSION
+        .set(ver)
+        .expect("OnceLock shouldn't be initialized.");
 
-    debug!("Reading ICF1 located at {:?}", icf1_path);
+    debug!("Checking if network requests are encrypted");
+    setup_network_encryption(&info)?;
 
-    let mut icf1_buf = {
-        let mut icf1_file = File::open(icf1_path)?;
-        let mut icf1_buf = Vec::new();
-        icf1_file.read_to_end(&mut icf1_buf)?;
-        icf1_buf
-    };
-    let icf = decode_icf(&mut icf1_buf).map_err(|err| anyhow!("Reading ICF failed: {:#}", err))?;
-
-    for entry in icf {
-        if let IcfData::App(app) = entry {
-            info!("Running on {} {}", app.id, app.version);
-            GAME_MAJOR_VERSION.store(app.version.major, Ordering::Relaxed);
-        }
-    }
-
-    debug!("Pinging Tachi API for status check and token verification");
-
-    let resp: TachiResponse<StatusCheck> =
-        request_tachi("GET", TACHI_STATUS_URL.as_str(), None::<()>)?;
-    let user_id = match resp {
-        TachiResponse::Err(err) => {
-            return Err(anyhow!("Tachi API returned an error: {}", err.description));
-        }
-        TachiResponse::Ok(resp) => {
-            if !resp.body.permissions.iter().any(|v| v == "submit_score") {
-                return Err(anyhow!(
-                    "API key has insufficient permissions. The permission submit_score must be set."
-                ));
-            }
-
-            let Some(user_id) = resp.body.whoami else {
-                return Err(anyhow!(
-                    "Status check was successful, yet API returned userID null?"
-                ));
-            };
-
-            user_id
-        }
-    };
-
-    info!("Logged in to Tachi with userID {user_id}");
-
-    debug!("Initializing detours");
-
-    crochet::enable!(winhttpwritedata_hook_wrapper)?;
-
-    if CONFIGURATION.general.export_pbs || cfg!(debug_assertions) {
-        crochet::enable!(winhttpreaddata_hook_wrapper)?;
-    }
-
-    info!("Hook successfully initialized");
+    info!("Enabling hooks");
+    crochet::enable!(winhttpwritedata_hook).context(CrochetSnafu)?;
 
     Ok(())
 }
 
-pub fn hook_release() -> Result<()> {
-    if !CONFIGURATION.general.enable {
-        return Ok(());
-    }
-
-    if crochet::is_enabled!(winhttpreaddata_hook_wrapper) {
-        crochet::disable!(winhttpreaddata_hook_wrapper)?;
-    }
-
-    if crochet::is_enabled!(winhttpwritedata_hook_wrapper) {
-        crochet::disable!(winhttpwritedata_hook_wrapper)?;
+pub fn hook_release() -> Result<(), HookError> {
+    if crochet::is_enabled!(winhttpwritedata_hook) {
+        info!("Disabling hooks");
+        crochet::disable!(winhttpwritedata_hook).context(CrochetSnafu)?;
     }
 
     Ok(())
 }
 
-#[crochet::hook(compile_check, "winhttp.dll", "WinHttpReadData")]
-fn winhttpreaddata_hook_wrapper(
-    h_request: HINTERNET,
-    lp_buffer: LPVOID,
-    dw_number_of_bytes_to_read: DWORD,
-    lpdw_number_of_bytes_read: LPDWORD,
-) -> BOOL {
-    debug!("hit winhttpreaddata");
-
-    let result = call_original!(
-        h_request,
-        lp_buffer,
-        dw_number_of_bytes_to_read,
-        lpdw_number_of_bytes_read
-    );
-
-    if result == FALSE {
-        let ec = unsafe { GetLastError() };
-        error!("Calling original WinHttpReadData function failed: {ec}");
-        return result;
-    }
-
-    let pb_imported = PB_IMPORTED.load(Ordering::SeqCst);
-    if cfg!(not(debug_assertions)) && pb_imported {
-        return result;
-    }
-
-    if let Err(err) = winhttprwdata_hook::<UserMusicResponse>(
-        h_request,
-        lp_buffer,
-        dw_number_of_bytes_to_read,
-        "GetUserMusicApi",
-        &GET_USER_MUSIC_API_ENCRYPTED,
-        move |_| {
-            if pb_imported {
-                return false;
-            }
-
-            PB_IMPORTED.store(true, Ordering::Relaxed);
-            if let Err(err) = Configuration::update(Configuration {
-                general: GeneralConfiguration {
-                    export_pbs: false,
-                    ..CONFIGURATION.general
-                },
-                cards: CONFIGURATION.cards.clone(),
-                crypto: CONFIGURATION.crypto.clone(),
-                tachi: CONFIGURATION.tachi.clone(),
-            }) {
-                error!("Could not update configuration to disable exporting PBs: {err:?}");
-            }
-
-            true
-        },
-    ) {
-        error!("{err:?}");
-    }
-
-    result
-}
-
 #[crochet::hook(compile_check, "winhttp.dll", "WinHttpWriteData")]
-fn winhttpwritedata_hook_wrapper(
-    h_request: HINTERNET,
+fn winhttpwritedata_hook(
+    hrequest: HINTERNET,
     lp_buffer: LPCVOID,
-    dw_number_of_bytes_to_write: DWORD,
-    lpdw_number_of_bytes_written: LPDWORD,
+    dw_n_bytes_to_write: DWORD,
+    lpdw_n_bytes_written: LPDWORD,
 ) -> BOOL {
-    debug!("hit winhttpwritedata");
-
-    if let Err(err) = winhttprwdata_hook::<UpsertUserAllRequest>(
-        h_request,
-        lp_buffer,
-        dw_number_of_bytes_to_write,
-        "UpsertUserAllApi",
-        &UPSERT_USER_ALL_API_ENCRYPTED,
-        |upsert_req| {
-            let user_data = &upsert_req.upsert_user_all.user_data[0];
-            let access_code = &user_data.access_code;
-            if !CONFIGURATION.cards.whitelist.is_empty()
-                && !CONFIGURATION.cards.whitelist.contains(access_code)
-            {
-                info!("Card {access_code} is not whitelisted, skipping score submission");
-                return false;
-            }
-
-            true
-        },
-    ) {
-        error!("{err:?}");
+    if let Err(e) = process_request(hrequest, lp_buffer, dw_n_bytes_to_write) {
+        error!("{e:#?}");
     }
 
     call_original!(
-        h_request,
+        hrequest,
         lp_buffer,
-        dw_number_of_bytes_to_write,
-        lpdw_number_of_bytes_written
+        dw_n_bytes_to_write,
+        lpdw_n_bytes_written
     )
 }
 
-/// Common hook for WinHttpWriteData/WinHttpReadData. The flow is similar for both
-/// hooks:
-/// - Read URL and User-Agent from the handle
-/// - Extract the API method from the URL, and exit if it's not the method we're
-/// looking for
-/// - Determine if the API is encrypted, and exit if it is and we don't have keys
-/// - Parse the body and convert it to Tachi's BATCH-MANUAL
-/// - Submit it off to Tachi, if our guard function (which takes the parsed body) allows so.
-fn winhttprwdata_hook<'a, T: Debug + DeserializeOwned + ToTachiImport + 'static>(
-    handle: HINTERNET,
-    buffer: *const c_void,
-    bufsz: DWORD,
-    unencrypted_endpoint: &str,
-    encrypted_endpoint: &Option<String>,
-    guard_fn: impl Fn(&T) -> bool + Send + 'static,
-) -> Result<()> {
-    let url = read_hinternet_url(handle)?;
-    let user_agent = read_hinternet_user_agent(handle)?;
-    debug!("user-agent {user_agent}, URL: {url}");
+fn process_request(
+    hrequest: HINTERNET,
+    buffer: LPCVOID,
+    bufsiz: DWORD,
+) -> Result<(), ProcessRequestError> {
+    let url = winhttp_query_option(hrequest, WINHTTP_OPTION_URL).context(UrlReadSnafu)?;
 
-    let maybe_endpoint = url
+    debug!("Captured request to {url}");
+
+    let endpoint = url
         .split('/')
         .last()
-        .ok_or(anyhow!("Could not extract last part of a split URL"))?;
+        .ok_or(ProcessRequestError::UrlMissingEndpointError)?;
+    let upsert_user_all_endpoint = UPSERT_USER_ALL_API
+        .get()
+        .ok_or(ProcessRequestError::UninitializedError)?;
 
-    let is_encrypted = is_encrypted_endpoint(maybe_endpoint);
-
-    let endpoint = if is_encrypted && user_agent.contains('#') {
-        user_agent
-            .split('#')
-            .next()
-            .ok_or(anyhow!("there should be at least one item in the split"))?
-    } else {
-        maybe_endpoint
-    };
-
-    let is_correct_endpoint = is_endpoint(endpoint, unencrypted_endpoint, encrypted_endpoint);
-    if cfg!(not(debug_assertions)) && !is_correct_endpoint {
+    if endpoint != upsert_user_all_endpoint {
         return Ok(());
     }
 
-    if is_encrypted && (CONFIGURATION.crypto.key.is_empty() || CONFIGURATION.crypto.iv.is_empty()) {
-        return Err(anyhow!("Communications with the server is encrypted, but no keys were provided. Fill in the keys by editing 'saekawa.toml'."));
+    let mut raw_body_slice =
+        unsafe { std::slice::from_raw_parts(buffer as *const u8, bufsiz as usize) };
+    let mut raw_body = Vec::with_capacity(bufsiz as usize);
+
+    raw_body_slice
+        .read_to_end(&mut raw_body)
+        .context(ReadBodySnafu)?;
+
+    #[cfg(debug_assertions)]
+    {
+        debug!("raw request: {}", faster_hex::hex_string(&raw_body));
     }
 
-    let mut raw_body = match read_slice(buffer as *const u8, bufsz as usize) {
-        Ok(data) => data,
-        Err(err) => {
-            return Err(anyhow!(
-                "There was an error reading the response body: {:#}",
-                err
-            ));
-        }
+    thread::spawn(move || {
+        let Some(config) = CONFIG.get() else {
+            error!("Config has not been initialized?");
+            return;
         };
 
-    debug!("raw body: {}", faster_hex::hex_string(&raw_body));
+        let Some(major_version) = GAME_MAJOR_VERSION.get() else {
+            error!("The game's major version is not known?");
+            return;
+        };
 
-    std::thread::spawn(move || {
-        let compressed_body = if is_encrypted {
-            match decrypt_aes256_cbc(
-                &mut raw_body,
-                &CONFIGURATION.crypto.key,
-                &CONFIGURATION.crypto.iv,
-            ) {
-                Ok(res) => res,
-                Err(err) => {
-                    error!("Could not decrypt response: {:#}", err);
+        let compressed_body = if let Some(keys) = CRYPTO_KEYS.get() {
+            match decrypt_aes256_cbc(&mut raw_body, &keys.key, &keys.iv) {
+                Ok(r) => r,
+                Err(e) => {
+                    error!("Could not decrypt request: {e:#?}");
                     return;
                 }
             }
@@ -333,23 +230,171 @@ fn winhttprwdata_hook<'a, T: Debug + DeserializeOwned + ToTachiImport + 'static>
             raw_body
         };
 
-        let body = match read_maybe_compressed_buffer(&compressed_body[..]) {
-            Ok(data) => data,
-            Err(err) => {
-                error!("There was an error decoding the request body: {:#}", err);
+        let body = match maybe_decompress_buffer(&compressed_body) {
+            Ok(s) => s,
+            Err(e) => {
+                error!("Could not read request as DEFLATE-compressed or plaintext: {e:#?}");
                 return;
             }
         };
 
-        debug!("decoded response body: {body}");
-
-        // Hit in debug build
-        if !is_correct_endpoint {
-            return;
+        #[cfg(debug_assertions)]
+        {
+            debug!("decoded request: {}", body.trim());
         }
 
-        score_handler::<T>(body, guard_fn)
+        let data = match serde_json::from_str::<UpsertUserAllRequest>(&body) {
+            Ok(d) => d,
+            Err(e) => {
+                error!("Could not parse request: {e:#?}");
+                return;
+            }
+        };
+
+        let user_data = &data.upsert_user_all.user_data[0];
+        let access_code = &user_data.access_code;
+        let Some(tachi_api_key) = config
+            .cards
+            .get(access_code)
+            .or_else(|| config.cards.get("default"))
+        else {
+            info!("No API keys was assigned to {access_code}, and no default API key was set, skipping score submission.");
+            return;
+        };
+
+        let import = data.to_batch_manual(
+            *major_version,
+            config.general.export_class,
+            config.general.fail_over_lamp,
+        );
+
+        if let Err(e) = execute_score_import(import, access_code, &tachi_api_key, &config) {
+            error!("{e}");
+        }
     });
 
     Ok(())
 }
+
+fn get_project_conf() -> Result<GameInformation, HookError> {
+    let project_conf = Ini::load_from_file("./project.conf").context(IniSnafu)?;
+    let major_version = &project_conf["Version"]["VerMajor"];
+    let minor_version = &project_conf["Version"]["VerMinor"];
+    let build_version = &project_conf["Version"]["VerRelease"];
+    let game_id = &project_conf["Project"]["GameID"];
+
+    Ok(GameInformation {
+        game_id: game_id.to_string(),
+        major: major_version.parse::<u16>().context(InvalidVersionSnafu)?,
+        minor: minor_version.parse::<u8>().context(InvalidVersionSnafu)?,
+        build: build_version.parse::<u8>().context(InvalidVersionSnafu)?,
+    })
+}
+
+fn determine_major_version(info: &GameInformation) -> u16 {
+    if info.game_id == "SDGS" {
+        if info.minor < 10 {
+            1
+        } else {
+            2
+        }
+    } else {
+        info.major
+    }
+}
+
+fn setup_network_encryption(info: &GameInformation) -> Result<(), HookError> {
+    debug!("Getting module information of the game process");
+    let mut modinfo: MaybeUninit<MODULEINFO> = MaybeUninit::uninit();
+    let result = unsafe {
+        GetModuleInformation(
+            GetCurrentProcess(),
+            GetModuleHandleW(ptr::null_mut()),
+            modinfo.as_mut_ptr(),
+            mem::size_of::<MODULEINFO>() as u32,
+        )
+    };
+
+    if result == 0 {
+        let err = unsafe { GetLastError() };
+
+        error!("Could not get information about the game process, error code {err}");
+        return Err(HookError::Win32Error { errno: err });
+    }
+
+    let modinfo = unsafe { modinfo.assume_init() };
+    debug!(
+        "Base address: {:p}, image size: {:x}",
+        modinfo.lpBaseOfDll, modinfo.SizeOfImage
+    );
+
+    debug!("Scanning game for encryption status");
+    let encryption_enabled = unsafe {
+        sigscan::is_network_encrypted(modinfo.lpBaseOfDll as *const _, modinfo.SizeOfImage as _)
+            .context(CryptoScanSnafu)?
+    };
+
+    let endpoint = if info.game_id == "SDGS" {
+        if info.minor < 10 {
+            "UpsertUserAllApiExp"
+        } else {
+            "UpsertUserAllApiC3Exp"
+        }
+    } else {
+        "UpsertUserAllApi"
+    };
+
+    if encryption_enabled {
+        info!("Network requests are encrypted.");
+
+        debug!("Searching for encryption keys. This might take a bit...");
+
+        let keys = unsafe {
+            sigscan::get_crypto_keys(modinfo.lpBaseOfDll as *const _, modinfo.SizeOfImage as _)
+                .context(CryptoScanSnafu)?
+        };
+
+        info!("Search completed successfully.");
+
+        #[cfg(debug_assertions)]
+        {
+            debug!(
+                "Key: {}, IV: {}, salt: {}, iterations: {}",
+                faster_hex::hex_string(&keys.key),
+                faster_hex::hex_string(&keys.iv),
+                faster_hex::hex_string(&keys.salt),
+                keys.iterations,
+            )
+        }
+
+        // For some reason, CHUNITHM SUPERSTAR/SUPERSTAR+ forgot to add "Exp" when
+        // hashing the endpoint.
+        let endpoint_password = if info.game_id == "SDGS" && info.minor < 10 {
+            "UpsertUserAllApi"
+        } else {
+            endpoint
+        };
+
+        let hashed_endpoint = hash_endpoint(endpoint_password, &keys.salt, keys.iterations);
+
+        debug!(
+            "Hashed {endpoint_password} with {:#?} to {hashed_endpoint}",
+            keys.salt
+        );
+
+        UPSERT_USER_ALL_API
+            .set(hashed_endpoint)
+            .expect("OnceLock shouldn't be initialized.");
+        CRYPTO_KEYS
+            .set(keys)
+            .expect("OnceLock shouldn't be initialized.");
+    } else {
+        info!("Network requests are not encrypted.");
+
+        UPSERT_USER_ALL_API
+            .set(endpoint.to_string())
+            .expect("OnceLock shouldn't be initialized.");
+    }
+
+    Ok(())
+}

src/score_import.rs

@@ -0,0 +1,257 @@
+use std::{fmt::Debug, fs::File, io, thread, time::Duration};
+
+use log::{debug, error, info};
+use rand::{rngs::ThreadRng, Rng};
+use serde::{Deserialize, Serialize};
+use snafu::{prelude::Snafu, ResultExt};
+
+use crate::{
+    config::SaekawaConfig,
+    types::tachi::{
+        api::{TachiFailureResponse, TachiResponse},
+        api_returns::{ImportPollStatus, ImportResponse},
+        batch_manual::BatchManualImport,
+        documents::ImportDocument,
+    },
+};
+
+const MAX_RETRY_COUNT: u32 = 3;
+static SAEKAWA_USER_AGENT: &str = concat!("saekawa/", env!("CARGO_PKG_VERSION"));
+
+#[derive(Snafu, Debug)]
+pub enum ScoreImportError {
+    #[snafu(display("Could not create import URL"))]
+    InvalidImportUrl { source: url::ParseError },
+
+    #[snafu(display("Tachi API returned an error: {}", response.description))]
+    TachiError { response: TachiFailureResponse },
+
+    #[snafu(display("Could not communicate with Tachi {max_retries} times."))]
+    MaxRetriesExhausted { max_retries: u32 },
+
+    #[snafu(display("Tachi returned an invalid response."))]
+    InvalidTachiResponse { source: io::Error },
+
+    #[snafu(display("Could not create backup batch manual file."))]
+    FailedCreatingBackup { source: io::Error },
+
+    #[snafu(display("Could not write backup batch manual file."))]
+    FailedWritingBackup { source: serde_json::Error },
+}
+
+/// This function blocks until it has completed, which may take a long time
+/// depending on the user's internet connection with Tachi. It's best to call
+/// this in a separate thread.
+pub fn execute_score_import(
+    import: BatchManualImport,
+    access_code: &str,
+    api_key: &str,
+    config: &SaekawaConfig,
+) -> Result<(), ScoreImportError> {
+    // Checking if there's actually anything to import before continuing on
+    if import.scores.is_empty()
+        && (import.classes.is_none()
+            || import
+                .classes
+                .as_ref()
+                .is_some_and(|c| c.dan.is_none() && c.emblem.is_none()))
+    {
+        return Ok(());
+    }
+
+    let import_url = config
+        .tachi
+        .base_url
+        .join("/ir/direct-manual/import")
+        .context(InvalidImportUrlSnafu)?
+        .to_string();
+    let client = saekawa_client(config);
+    let response = match request_tachi::<_, ImportResponse>(
+        &client,
+        "POST",
+        &import_url,
+        &api_key,
+        Some(&import),
+    ) {
+        Ok(r) => r,
+        Err(ScoreImportError::MaxRetriesExhausted { max_retries }) => {
+            error!("Could not reach Tachi after {max_retries} attempts.");
+
+            let Some(d) = &config.general.failed_import_dir else {
+                return Err(ScoreImportError::MaxRetriesExhausted { max_retries });
+            };
+
+            info!("Saving batch manual JSON to configured failed import directory for later import.");
+            
+            let current_time = chrono::Local::now().format("%Y-%m-%d_%H-%M-%S");
+            let failed_import_filename =
+                d.join(format!("saekawa_{}_{}.json", access_code, current_time));
+
+            {
+                let file = File::create(&failed_import_filename).context(FailedCreatingBackupSnafu)?;
+                serde_json::to_writer(file, &import).context(FailedWritingBackupSnafu)?;
+            }
+
+            info!("Saved batch manual JSON to {}", failed_import_filename.to_string_lossy());
+            
+            return Ok(());
+        }
+        Err(e) => return Err(e),
+    };
+
+    let response = match response {
+        TachiResponse::Ok(r) => r,
+        TachiResponse::Err(e) => return Err(ScoreImportError::TachiError { response: e }),
+    };
+
+    match response.body {
+        ImportResponse::Deferred(d) => {
+            info!("Import was queued for processing. Poll URL: {}", d.url);
+            poll_deferred_import(&client, &api_key, &d.url);
+            return Ok(());
+        }
+        ImportResponse::Completed(d) => {
+            log_tachi_import(&response.description, &d);
+            return Ok(());
+        }
+    }
+}
+
+fn saekawa_client(config: &SaekawaConfig) -> ureq::Agent {
+    ureq::builder()
+        .timeout(Duration::from_millis(config.general.timeout))
+        .user_agent(SAEKAWA_USER_AGENT)
+        .build()
+}
+
+fn exponential_backoff(rand: &mut ThreadRng, attempt: u32) -> u64 {
+    // attempt | backoff
+    // 0       | 2-4 seconds
+    // 1       | 8-16 seconds
+    // 2       | 32-64 seconds
+    return rand.gen_range(500..=1000) * 4_u64.pow(attempt + 1);
+}
+
+fn request_tachi<T, R>(
+    client: &ureq::Agent,
+    method: &str,
+    url: &str,
+    api_key: &str,
+    body: Option<T>,
+) -> Result<TachiResponse<R>, ScoreImportError>
+where
+    T: Serialize + Debug,
+    R: for<'de> Deserialize<'de> + Debug,
+{
+    let auth_header = format!("Bearer {}", api_key);
+    let mut rand = rand::thread_rng();
+
+    for attempt in 0..MAX_RETRY_COUNT {
+        debug!(
+            "Requesting Tachi, attempt {}/{MAX_RETRY_COUNT}",
+            attempt + 1
+        );
+
+        let request = client
+            .request(method, url)
+            .set("Authorization", &auth_header);
+        let response = if let Some(ref body) = body {
+            request.send_json(body)
+        } else {
+            request.call()
+        };
+        let response = match response {
+            Ok(r) => r,
+            Err(ureq::Error::Transport(e)) => {
+                error!("Could not reach Tachi API. Is your network up or are they having issues?.");
+                error!("Detailed error: {e:#?}");
+
+                if attempt != MAX_RETRY_COUNT - 1 {
+                    let wait_time = exponential_backoff(&mut rand, attempt);
+
+                    info!("Waiting for {wait_time}ms before trying again...");
+                    thread::sleep(Duration::from_millis(wait_time));
+                    continue;
+                }
+
+                break;
+            }
+            Err(ureq::Error::Status(code, response)) => {
+                if code >= 500 {
+                    error!("Tachi is having a server error. Response code was {code}.");
+
+                    if let Ok(s) = response.into_string() {
+                        error!("Response from Tachi: {s}");
+                    } else {
+                        error!("No response could be read.");
+                    }
+
+                    if attempt != MAX_RETRY_COUNT - 1 {
+                        let wait_time = exponential_backoff(&mut rand, attempt);
+
+                        info!("Waiting for {wait_time}ms before trying again...");
+                        thread::sleep(Duration::from_millis(wait_time));
+                        continue;
+                    }
+
+                    break;
+                }
+
+                response
+            }
+        };
+
+        return response
+            .into_json::<TachiResponse<R>>()
+            .context(InvalidTachiResponseSnafu);
+    }
+
+    return Err(ScoreImportError::MaxRetriesExhausted {
+        max_retries: MAX_RETRY_COUNT,
+    });
+}
+
+fn log_tachi_import(description: &str, import: &ImportDocument) {
+    info!(
+        "{description} {} scores, {} sessions, {} errors",
+        import.score_ids.len(),
+        import.created_sessions.len(),
+        import.errors.len()
+    );
+
+    for err in &import.errors {
+        error!("{}: {}", err.error_type, err.message);
+    }
+}
+
+fn poll_deferred_import(client: &ureq::Agent, api_key: &str, poll_url: &str) {
+    loop {
+        let resp = match request_tachi::<_, ImportPollStatus>(
+            &client, "GET", &poll_url, &api_key, None::<()>,
+        ) {
+            Ok(r) => r,
+            Err(e) => {
+                error!("Could not poll import status. While Tachi has received the score, Saekawa cannot make any guarantees about its success. Detailed error: {e:#?}");
+                return;
+            }
+        };
+
+        let resp = match resp {
+            TachiResponse::Ok(r) => r,
+            TachiResponse::Err(e) => {
+                error!("Tachi API returned an error: {}", e.description);
+                return;
+            }
+        };
+
+        match resp.body {
+            ImportPollStatus::Completed { import } => {
+                log_tachi_import(&resp.description, &import);
+                return;
+            }
+            _ => {}
+        }
+
+        thread::sleep(Duration::from_secs(1));
+    }
+}

src/sigscan.rs

@@ -0,0 +1,236 @@
+use std::{ffi::CStr, slice};
+
+use lightningscanner::{ScanMode, Scanner};
+use log::{debug, error};
+use pbkdf2::pbkdf2_hmac;
+use sha1::Sha1;
+use snafu::prelude::Snafu;
+
+#[derive(Debug)]
+pub struct CryptoKeys {
+    pub key: Vec<u8>,
+    pub iv: Vec<u8>,
+    pub salt: Vec<u8>,
+    pub iterations: u32,
+}
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Snafu)]
+pub enum CryptoScanError {
+    MissingSignature,
+    NotEncrypted,
+}
+
+/// SAFETY: The caller ensures that `module_base` and `module_size` are valid.
+pub unsafe fn is_network_encrypted(
+    module_base: *const u8,
+    module_size: usize,
+) -> Result<bool, CryptoScanError> {
+    let scan_mode = if is_x86_feature_detected!("avx2") {
+        ScanMode::Avx2
+    } else if is_x86_feature_detected!("sse4.2") {
+        ScanMode::Sse42
+    } else {
+        ScanMode::Scalar
+    };
+
+    debug!("Using {scan_mode:?} for signature scanning");
+
+    debug!("Scanning for the endpoint salt password");
+    // b"?AVDeflate@projClient@@\x??\x??\x??\x??\x??\x??\x??\x??"
+    // This is what the patchers are patching out when disabling encryption. This is
+    // also where the endpoint salt password can be found.
+    let scanner = Scanner::new("3F 41 56 44 65 66 6C 61 74 65 40 70 72 6F 6A 43 6C 69 65 6E 74 40 40 ?? ?? ?? ?? ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        error!("Could not find the endpoint salt password");
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let crypto_config = *result.get_addr().wrapping_add(0x1B);
+
+    if crypto_config == 0 {
+        return Ok(false);
+    }
+
+    Ok(true)
+}
+
+/// SAFETY: The caller ensures that `module_base` and `module_size` are valid.
+pub unsafe fn get_crypto_keys(
+    module_base: *const u8,
+    module_size: usize,
+) -> Result<CryptoKeys, CryptoScanError> {
+    let scan_mode = if is_x86_feature_detected!("avx2") {
+        ScanMode::Avx2
+    } else if is_x86_feature_detected!("sse4.2") {
+        ScanMode::Sse42
+    } else {
+        ScanMode::Scalar
+    };
+
+    debug!("Using {scan_mode:?} for signature scanning");
+
+    debug!("Scanning for the endpoint salt password");
+    // b"?AVDeflate@projClient@@\x??\x??\x??\x??\x??\x??\x??\x??"
+    // This is what the patchers are patching out when disabling encryption. This is
+    // also where the endpoint salt password can be found.
+    let scanner = Scanner::new("3F 41 56 44 65 66 6C 61 74 65 40 70 72 6F 6A 43 6C 69 65 6E 74 40 40 ?? ?? ?? ?? ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        error!("Could not find the endpoint salt password");
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let crypto_config = *result.get_addr().wrapping_add(0x1B);
+
+    if crypto_config == 0 {
+        return Err(CryptoScanError::NotEncrypted);
+    }
+
+    let endpoint_salt_password_address = if crypto_config == *result.get_addr().wrapping_add(0x1F) {
+        i32_from_ptr_le_bytes(result.get_addr().wrapping_add(0x23)) as *const i8
+    } else {
+        i32_from_ptr_le_bytes(result.get_addr().wrapping_add(0x1F)) as *const i8
+    };
+
+    let endpoint_salt_password = CStr::from_ptr(endpoint_salt_password_address);
+
+    debug!(
+        "Endpoint salt password: {} ({endpoint_salt_password_address:p})",
+        endpoint_salt_password.to_string_lossy()
+    );
+
+    // Scanning for the call to [`PKCS5_PBKDF2_HMAC_SHA1`](https://www.openssl.org/docs/man3.2/man3/PKCS5_PBKDF2_HMAC_SHA1.html)
+    // with saltlen=16, iter=31, keylen=8 to find the endpoint salt's salt
+    let scanner = Scanner::new("52 6A 08 6A ?? 6A 10 68 ?? ?? ?? ?? 51 53 E8 ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let endpoint_salt_rounds = *result.get_addr().wrapping_add(0x04) as u32;
+    let endpoint_salt_salt_address =
+        i32_from_ptr_le_bytes(result.get_addr().wrapping_add(0x08)) as *const u8;
+    let endpoint_salt_salt = slice::from_raw_parts(endpoint_salt_salt_address, 16);
+
+    debug!(
+        "Endpoint salt salt: {} ({endpoint_salt_salt_address:p})",
+        faster_hex::hex_string(endpoint_salt_salt)
+    );
+
+    let mut endpoint_salt = vec![0u8; 8];
+    pbkdf2_hmac::<Sha1>(
+        endpoint_salt_password.to_bytes(),
+        endpoint_salt_salt,
+        endpoint_salt_rounds,
+        &mut endpoint_salt,
+    );
+
+    debug!("Endpoint salt: {endpoint_salt:X?}");
+
+    // Scanning for the call to [`PKCS5_PBKDF2_HMAC_SHA1`](https://www.openssl.org/docs/man3.2/man3/PKCS5_PBKDF2_HMAC_SHA1.html)
+    // with saltlen=16, iter=??, keylen=32 to find the encryption key's salt
+    let scanner = Scanner::new("50 6A 20 6A ?? 6A 10 2B CA 68 ?? ?? ?? ?? 51 55 E8 ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let encryption_key_rounds = *result.get_addr().wrapping_add(0x04) as u32;
+    let encryption_key_salt_address =
+        i32_from_ptr_le_bytes(result.get_addr().wrapping_add(0x0A)) as *const u8;
+    let encryption_key_salt = slice::from_raw_parts(encryption_key_salt_address, 16);
+
+    debug!(
+        "Encryption key salt: {} ({encryption_key_salt_address:p})",
+        faster_hex::hex_string(encryption_key_salt)
+    );
+
+    // b"?AVSystemInterface@projClient@@\x??\x??\x??\x??\x??\x??\x??\x??\x??\x??\x??\x??"
+    let scanner = Scanner::new("3F 41 56 53 79 73 74 65 6D 49 6E 74 65 72 66 61 63 65 40 70 72 6F 6A 43 6C 69 65 6E 74 40 40 ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let encryption_key_password_address =
+        i32_from_ptr_le_bytes(result.get_addr().wrapping_add(0x23)) as *const i8;
+    let encryption_key_password = CStr::from_ptr(encryption_key_password_address);
+
+    debug!(
+        "Encryption key password: {} ({encryption_key_password_address:p})",
+        encryption_key_password.to_string_lossy()
+    );
+
+    let mut encryption_key = vec![0u8; 32];
+    pbkdf2_hmac::<Sha1>(
+        encryption_key_password.to_bytes(),
+        encryption_key_salt,
+        encryption_key_rounds,
+        &mut encryption_key,
+    );
+
+    for byte in encryption_key.iter_mut() {
+        *byte = (*byte % 0x5E) + 0x21;
+    }
+
+    debug!("Encryption key: {encryption_key:X?}");
+
+    // Encryption IV
+    let scanner2 = Scanner::new("E8 ?? ?? ?? ?? F3 0F 7E 05 ?? ?? ?? ?? 6A 01");
+    let result2 = scanner2.find(Some(scan_mode), module_base, module_size);
+
+    let iv_addr = if result2.is_valid() {
+        i32_from_ptr_le_bytes(result2.get_addr().wrapping_add(0x09)) as *const i8
+    } else {
+        let scanner1 = Scanner::new("F3 0F 7E 05 ?? ?? ?? ?? 8B 74 24 24 6A 01");
+        let result1 = scanner1.find(Some(scan_mode), module_base, module_size);
+
+        if !result1.is_valid() {
+            return Err(CryptoScanError::MissingSignature);
+        }
+
+        i32_from_ptr_le_bytes(result1.get_addr().wrapping_add(0x04)) as *const i8
+    };
+
+    let iv = CStr::from_ptr(iv_addr).to_bytes().to_vec();
+
+    debug!(
+        "Encryption IV: {} ({iv_addr:p})",
+        faster_hex::hex_string(&iv)
+    );
+
+    let scanner = Scanner::new("C7 86 ?? ?? ?? ?? ?? ?? ?? ?? 0F 8C ?? ?? ?? ?? 85 ED 0F 84 ?? ?? ?? ?? 85 DB 0F 84 ?? ?? ?? ??");
+    let result = scanner.find(Some(scan_mode), module_base, module_size);
+
+    if !result.is_valid() {
+        return Err(CryptoScanError::MissingSignature);
+    }
+
+    let iterations = u32::from_le_bytes(from_raw_parts_const(result.get_addr().wrapping_add(0x06)));
+
+    debug!("Iterations: {iterations}");
+
+    Ok(CryptoKeys {
+        key: encryption_key,
+        iv,
+        salt: endpoint_salt,
+        iterations,
+    })
+}
+
+unsafe fn from_raw_parts_const<const N: usize>(ptr: *const u8) -> [u8; N] {
+    slice::from_raw_parts(ptr, N)
+        .try_into()
+        .expect("slice::from_raw_parts with len=N should convert to [u8; N]")
+}
+
+#[inline]
+unsafe fn i32_from_ptr_le_bytes(ptr: *const u8) -> i32 {
+    i32::from_le_bytes(from_raw_parts_const(ptr))
+}

src/types/chuni/mod.rs

@@ -0,0 +1,31 @@
+mod music;
+pub mod upsert;
+
+use serde::{de, Deserialize};
+
+pub use self::upsert::UpsertUserAllRequest;
+
+fn deserialize_bool<'de, D>(deserializer: D) -> Result<bool, D::Error>
+where
+    D: de::Deserializer<'de>,
+{
+    #[derive(Deserialize)]
+    #[serde(untagged)]
+    enum BooleanishTypes {
+        String(String),
+        Bool(bool),
+        Number(i32),
+    }
+
+    let s: BooleanishTypes = de::Deserialize::deserialize(deserializer)?;
+
+    match s {
+        BooleanishTypes::String(s) => match s.as_str() {
+            "true" => Ok(true),
+            "false" => Ok(false),
+            _ => Err(de::Error::unknown_variant(&s, &["true", "false"])),
+        },
+        BooleanishTypes::Bool(b) => Ok(b),
+        BooleanishTypes::Number(n) => Ok(n > 0),
+    }
+}

src/types/chuni/music.rs

@@ -0,0 +1,41 @@
+use serde::{Deserialize, Serialize};
+use serde_aux::prelude::*;
+
+use super::deserialize_bool;
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UserMusicResponse {
+    pub user_id: String,
+    pub length: u32,
+    pub user_music_list: Vec<UserMusicItem>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UserMusicItem {
+    pub length: u32,
+    pub user_music_detail_list: Vec<UserMusicDetail>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UserMusicDetail {
+    #[serde(deserialize_with = "deserialize_number_from_string")]
+    pub music_id: u32,
+
+    #[serde(deserialize_with = "deserialize_number_from_string")]
+    pub level: u32,
+
+    #[serde(deserialize_with = "deserialize_number_from_string")]
+    pub score_max: u32,
+
+    #[serde(deserialize_with = "deserialize_bool")]
+    pub is_all_justice: bool,
+
+    #[serde(deserialize_with = "deserialize_bool")]
+    pub is_full_combo: bool,
+
+    #[serde(deserialize_with = "deserialize_bool")]
+    pub is_success: bool,
+}

src/types/chuni/upsert.rs

@@ -1,29 +1,21 @@
-use serde::{de, Deserialize, Serialize};
+use serde::{Deserialize, Serialize};
 use serde_aux::prelude::*;
 
-fn deserialize_bool<'de, D>(deserializer: D) -> Result<bool, D::Error>
-where
-    D: de::Deserializer<'de>,
-{
-    #[derive(Deserialize)]
-    #[serde(untagged)]
-    enum StringOrBoolean {
-        String(String),
-        Bool(bool),
-        Number(i32),
-    }
+use super::deserialize_bool;
 
-    let s: StringOrBoolean = de::Deserialize::deserialize(deserializer)?;
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UpsertUserAllRequest {
+    pub user_id: String,
+    pub upsert_user_all: UpsertUserAllBody,
+}
 
-    match s {
-        StringOrBoolean::String(s) => match s.as_str() {
-            "true" => Ok(true),
-            "false" => Ok(false),
-            _ => Err(de::Error::unknown_variant(&s, &["true", "false"])),
-        },
-        StringOrBoolean::Bool(b) => Ok(b),
-        StringOrBoolean::Number(n) => Ok(n > 0),
-    }
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UpsertUserAllBody {
+    pub user_data: Vec<UserData>,
+    pub user_data_ex: Option<Vec<UserDataEx>>,
+    pub user_playlog_list: Vec<UserPlaylog>,
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
@@ -31,11 +23,18 @@ where
 pub struct UserData {
     pub access_code: String,
 
-    #[serde(deserialize_with = "deserialize_number_from_string")]
-    pub class_emblem_base: u32,
+    #[serde(deserialize_with = "deserialize_option_number_from_string")]
+    pub class_emblem_base: Option<u32>,
 
+    #[serde(deserialize_with = "deserialize_option_number_from_string")]
+    pub class_emblem_medal: Option<u32>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UserDataEx {
     #[serde(deserialize_with = "deserialize_number_from_string")]
-    pub class_emblem_medal: u32,
+    pub medal: u32,
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
@@ -71,6 +70,7 @@ pub struct UserPlaylog {
 
     #[serde(deserialize_with = "deserialize_number_from_string")]
     pub judge_critical: u32,
+
     // Only introduced in CHUNITHM NEW, thus needing a default value.
     #[serde(
         default = "default_judge_heaven",
@@ -91,54 +91,3 @@ pub struct UserPlaylog {
 fn default_judge_heaven() -> u32 {
     0
 }
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct UserMusicDetail {
-    #[serde(deserialize_with = "deserialize_number_from_string")]
-    pub music_id: u32,
-
-    #[serde(deserialize_with = "deserialize_number_from_string")]
-    pub level: u32,
-
-    #[serde(deserialize_with = "deserialize_number_from_string")]
-    pub score_max: u32,
-
-    #[serde(deserialize_with = "deserialize_bool")]
-    pub is_all_justice: bool,
-
-    #[serde(deserialize_with = "deserialize_bool")]
-    pub is_full_combo: bool,
-
-    #[serde(deserialize_with = "deserialize_bool")]
-    pub is_success: bool,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct UserMusicItem {
-    pub length: u32,
-    pub user_music_detail_list: Vec<UserMusicDetail>,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct UserMusicResponse {
-    pub user_id: String,
-    pub length: u32,
-    pub user_music_list: Vec<UserMusicItem>,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct UpsertUserAllBody {
-    pub user_data: Vec<UserData>,
-    pub user_playlog_list: Vec<UserPlaylog>,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct UpsertUserAllRequest {
-    pub user_id: String,
-    pub upsert_user_all: UpsertUserAllBody,
-}

src/types/mod.rs

@@ -1,2 +1,143 @@
-pub mod game;
+pub mod chuni;
 pub mod tachi;
+
+use chrono::{FixedOffset, NaiveDateTime, TimeZone};
+use num_enum::TryFromPrimitiveError;
+use snafu::{ResultExt, Snafu};
+
+use self::{
+    chuni::{upsert::UserPlaylog, UpsertUserAllRequest},
+    tachi::batch_manual::{
+        class::ClassEmblem,
+        score::{Difficulty, Judgements, Lamp, MatchType, OptionalMetrics},
+        BatchManualClasses, BatchManualImport, BatchManualScore,
+    },
+};
+
+#[derive(Debug, Snafu)]
+pub enum ScoreConversionError {
+    #[snafu(display("Unknown difficulty index."))]
+    InvalidDifficulty {
+        source: TryFromPrimitiveError<Difficulty>,
+    },
+
+    #[snafu(display("Invalid play date."))]
+    InvalidPlayDate { source: chrono::format::ParseError },
+}
+
+impl UserPlaylog {
+    pub fn to_batch_manual(
+        &self,
+        major_version: u16,
+        fail_over_lamp: bool,
+    ) -> Result<BatchManualScore, ScoreConversionError> {
+        let lamp = if !self.is_clear && fail_over_lamp {
+            Lamp::Failed
+        } else if self.is_all_justice {
+            if self.judge_justice + self.judge_attack + self.judge_guilty == 0 {
+                Lamp::AllJusticeCritical
+            } else {
+                Lamp::AllJustice
+            }
+        } else if self.is_full_combo {
+            Lamp::FullCombo
+        } else if self.is_clear {
+            Lamp::Clear
+        } else {
+            Lamp::Failed
+        };
+
+        let judgements = Judgements {
+            jcrit: self.judge_heaven + self.judge_critical,
+            justice: self.judge_justice,
+            attack: self.judge_attack,
+            miss: self.judge_guilty,
+        };
+
+        let difficulty = if major_version == 1 && self.level == 4 {
+            Difficulty::WorldsEnd
+        } else {
+            Difficulty::try_from(self.level).context(InvalidDifficultySnafu)?
+        };
+
+        let datetime = NaiveDateTime::parse_from_str(&self.user_play_date, "%Y-%m-%d %H:%M:%S")
+            .context(InvalidPlayDateSnafu)?;
+        let jst_offset = FixedOffset::east_opt(9 * 3600).expect("chrono should parse JST timezone");
+        let jst_time = jst_offset.from_local_datetime(&datetime).unwrap();
+
+        Ok(BatchManualScore {
+            score: self.score,
+            lamp,
+            match_type: MatchType::InGameId,
+            identifier: self.music_id.clone(),
+            difficulty,
+            time_achieved: Some(jst_time.timestamp_millis() as u128),
+            judgements: Some(judgements),
+            optional: Some(OptionalMetrics {
+                max_combo: self.max_combo,
+            }),
+        })
+    }
+}
+
+pub trait ToBatchManual {
+    fn to_batch_manual(
+        &self,
+        major_version: u16,
+        export_class: bool,
+        fail_over_lamp: bool,
+    ) -> BatchManualImport;
+}
+
+impl ToBatchManual for UpsertUserAllRequest {
+    fn to_batch_manual(
+        &self,
+        major_version: u16,
+        export_class: bool,
+        fail_over_lamp: bool,
+    ) -> BatchManualImport {
+        let user_data = &self.upsert_user_all.user_data[0];
+
+        let classes = if export_class {
+            let dan = if let Some(medal) = user_data.class_emblem_medal {
+                ClassEmblem::try_from(medal).ok()
+            } else if let Some(user_data_ex) = &self.upsert_user_all.user_data_ex {
+                ClassEmblem::try_from(user_data_ex[0].medal).ok()
+            } else {
+                None
+            };
+            let emblem = user_data
+                .class_emblem_base
+                .map(|b| ClassEmblem::try_from(b).ok())
+                .flatten();
+
+            Some(BatchManualClasses { dan, emblem })
+        } else {
+            None
+        };
+
+        let scores = self
+            .upsert_user_all
+            .user_playlog_list
+            .iter()
+            .filter_map(|p| {
+                let conv = p.to_batch_manual(major_version, fail_over_lamp);
+
+                if conv
+                    .as_ref()
+                    .is_ok_and(|s| s.difficulty != Difficulty::WorldsEnd)
+                {
+                    conv.ok()
+                } else {
+                    None
+                }
+            })
+            .collect::<Vec<_>>();
+
+        BatchManualImport {
+            classes,
+            scores,
+            ..Default::default()
+        }
+    }
+}

src/types/tachi.rs

@@ -1,435 +0,0 @@
-use anyhow::Result;
-use chrono::{FixedOffset, NaiveDateTime, TimeZone};
-use num_enum::TryFromPrimitive;
-use serde::{de, Deserialize, Deserializer, Serialize};
-use serde_json::{Map, Value};
-
-use super::game::{UpsertUserAllRequest, UserMusicDetail, UserMusicResponse, UserPlaylog};
-
-#[derive(Debug, Clone)]
-pub enum TachiResponse<T> {
-    Ok(TachiSuccessResponse<T>),
-    Err(TachiErrorResponse),
-}
-
-impl<'de, T> Deserialize<'de> for TachiResponse<T>
-where
-    T: Deserialize<'de>,
-{
-    fn deserialize<D>(deserializer: D) -> Result<TachiResponse<T>, D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        let mut map = Map::deserialize(deserializer)?;
-
-        let success = map
-            .remove("success")
-            .ok_or_else(|| de::Error::missing_field("success"))
-            .map(Deserialize::deserialize)?
-            .map_err(de::Error::custom)?;
-        let rest = Value::Object(map);
-
-        if success {
-            TachiSuccessResponse::deserialize(rest)
-                .map(TachiResponse::Ok)
-                .map_err(de::Error::custom)
-        } else {
-            TachiErrorResponse::deserialize(rest)
-                .map(TachiResponse::Err)
-                .map_err(de::Error::custom)
-        }
-    }
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct TachiSuccessResponse<T> {
-    pub description: String,
-    pub body: T,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct TachiErrorResponse {
-    pub description: String,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct StatusCheck {
-    pub permissions: Vec<String>,
-    pub whoami: Option<u32>,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(untagged)]
-pub enum ImportResponse {
-    Queued {
-        url: String,
-
-        #[serde(rename = "importID")]
-        import_id: String,
-    },
-    Finished(ImportDocument),
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct ImportDocument {
-    #[serde(rename = "scoreIDs")]
-    pub score_ids: Vec<String>,
-
-    pub errors: Vec<ImportErrContent>,
-
-    #[serde(rename = "createdSessions")]
-    pub created_sessions: Vec<SessionInfoReturn>,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct ImportErrContent {
-    #[serde(rename = "type")]
-    pub error_type: String,
-
-    pub message: String,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct SessionInfoReturn {
-    #[serde(rename = "type")]
-    pub session_type: String,
-
-    #[serde(rename = "sessionID")]
-    pub session_id: String,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(tag = "importStatus")]
-pub enum ImportPollStatus {
-    #[serde(rename = "ongoing")]
-    Ongoing { progress: ImportProgress },
-
-    #[serde(rename = "completed")]
-    Completed { import: ImportDocument },
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, Default)]
-pub struct ImportProgress {
-    pub description: String,
-    pub value: i32,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct Import {
-    pub meta: ImportMeta,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub classes: Option<ImportClasses>,
-    pub scores: Vec<ImportScore>,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct ImportMeta {
-    pub game: String,
-    pub playtype: String,
-    pub service: String,
-}
-
-impl Default for ImportMeta {
-    fn default() -> Self {
-        Self {
-            game: "chunithm".to_string(),
-            playtype: "Single".to_string(),
-            service: "Saekawa".to_string(),
-        }
-    }
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, Default)]
-pub struct ImportClasses {
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub dan: Option<ClassEmblem>,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub emblem: Option<ClassEmblem>,
-}
-
-#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
-#[repr(u32)]
-pub enum ClassEmblem {
-    #[serde(rename = "DAN_I")]
-    First = 1,
-
-    #[serde(rename = "DAN_II")]
-    Second = 2,
-
-    #[serde(rename = "DAN_III")]
-    Third = 3,
-
-    #[serde(rename = "DAN_IV")]
-    Fourth = 4,
-
-    #[serde(rename = "DAN_V")]
-    Fifth = 5,
-
-    #[serde(rename = "DAN_INFINITE")]
-    Infinite = 6,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ImportScore {
-    pub score: u32,
-    pub lamp: TachiLamp,
-    pub match_type: String,
-    pub identifier: String,
-    pub difficulty: Difficulty,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub time_achieved: Option<u128>,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub judgements: Option<Judgements>,
-
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub optional: Option<OptionalMetrics>,
-}
-
-#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
-#[repr(u32)]
-pub enum TachiLamp {
-    #[serde(rename = "FAILED")]
-    Failed = 0,
-
-    #[serde(rename = "CLEAR")]
-    Clear = 1,
-
-    #[serde(rename = "FULL COMBO")]
-    FullCombo = 2,
-
-    #[serde(rename = "ALL JUSTICE")]
-    AllJustice = 3,
-
-    #[serde(rename = "ALL JUSTICE CRITICAL")]
-    AllJusticeCritical = 4,
-}
-
-#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
-#[repr(u32)]
-pub enum Difficulty {
-    #[serde(rename = "BASIC")]
-    Basic = 0,
-
-    #[serde(rename = "ADVANCED")]
-    Advanced = 1,
-
-    #[serde(rename = "EXPERT")]
-    Expert = 2,
-
-    #[serde(rename = "MASTER")]
-    Master = 3,
-
-    #[serde(rename = "ULTIMA")]
-    Ultima = 4,
-
-    #[serde(rename = "WORLD'S END")]
-    WorldsEnd = 5,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-pub struct Judgements {
-    pub jcrit: u32,
-    pub justice: u32,
-    pub attack: u32,
-    pub miss: u32,
-}
-
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct OptionalMetrics {
-    pub max_combo: u32,
-}
-
-impl ImportScore {
-    pub fn try_from_playlog(
-        p: &UserPlaylog,
-        major_version: u16,
-        fail_over_lamp: bool,
-    ) -> Result<ImportScore> {
-        let lamp = if !p.is_clear && fail_over_lamp {
-            TachiLamp::Failed
-        } else if p.is_all_justice {
-            if p.judge_justice + p.judge_attack + p.judge_guilty == 0 {
-                TachiLamp::AllJusticeCritical
-            } else {
-                TachiLamp::AllJustice
-            }
-        } else if p.is_full_combo {
-            TachiLamp::FullCombo
-        } else if p.is_clear {
-            TachiLamp::Clear
-        } else {
-            TachiLamp::Failed
-        };
-
-        let judgements = Judgements {
-            jcrit: p.judge_heaven + p.judge_critical,
-            justice: p.judge_justice,
-            attack: p.judge_attack,
-            miss: p.judge_guilty,
-        };
-
-        let difficulty = if major_version == 1 && p.level == 4 {
-            Difficulty::WorldsEnd
-        } else {
-            Difficulty::try_from(p.level)?
-        };
-
-        let datetime = NaiveDateTime::parse_from_str(&p.user_play_date, "%Y-%m-%d %H:%M:%S")?;
-        let jst_offset =
-            FixedOffset::east_opt(9 * 3600).expect("chrono should be able to parse JST timezone");
-        let jst_time = jst_offset.from_local_datetime(&datetime).unwrap();
-
-        Ok(ImportScore {
-            score: p.score,
-            lamp,
-            match_type: "inGameID".to_string(),
-            identifier: p.music_id.clone(),
-            difficulty,
-            time_achieved: Some(jst_time.timestamp_millis() as u128),
-            judgements: Some(judgements),
-            optional: Some(OptionalMetrics {
-                max_combo: p.max_combo,
-            }),
-        })
-    }
-
-    fn try_from_music_detail(
-        d: &UserMusicDetail,
-        major_version: u16,
-        fail_over_lamp: bool,
-    ) -> Result<ImportScore> {
-        let lamp = if !d.is_success && fail_over_lamp {
-            TachiLamp::Failed
-        } else if d.is_all_justice {
-            TachiLamp::AllJustice
-        } else if d.is_full_combo {
-            TachiLamp::FullCombo
-        } else if d.is_success {
-            TachiLamp::Clear
-        } else {
-            TachiLamp::Failed
-        };
-
-        let difficulty = if major_version == 1 && d.level == 4 {
-            Difficulty::WorldsEnd
-        } else {
-            Difficulty::try_from(d.level)?
-        };
-
-        Ok(ImportScore {
-            score: d.score_max,
-            lamp,
-            match_type: "inGameID".to_string(),
-            identifier: d.music_id.to_string(),
-            difficulty,
-            time_achieved: None,
-            judgements: None,
-            optional: None,
-        })
-    }
-}
-
-pub trait ToTachiImport {
-    fn displayed_id(&self) -> &str;
-    fn displayed_id_type(&self) -> &str;
-    fn to_tachi_import(
-        &self,
-        major_version: u16,
-        export_class: bool,
-        fail_over_lamp: bool,
-    ) -> Import;
-}
-
-impl ToTachiImport for UserMusicResponse {
-    fn displayed_id(&self) -> &str {
-        &self.user_id
-    }
-
-    fn displayed_id_type(&self) -> &str {
-        "user ID"
-    }
-
-    fn to_tachi_import(&self, major_version: u16, _: bool, fail_over_lamp: bool) -> Import {
-        let scores = self
-            .user_music_list
-            .iter()
-            .flat_map(|item| {
-                item.user_music_detail_list.iter().filter_map(|d| {
-                    let result =
-                        ImportScore::try_from_music_detail(d, major_version, fail_over_lamp);
-                    if result
-                        .as_ref()
-                        .is_ok_and(|v| v.difficulty != Difficulty::WorldsEnd)
-                    {
-                        result.ok()
-                    } else {
-                        None
-                    }
-                })
-            })
-            .collect::<Vec<_>>();
-
-        Import {
-            scores,
-            ..Default::default()
-        }
-    }
-}
-
-impl ToTachiImport for UpsertUserAllRequest {
-    fn displayed_id(&self) -> &str {
-        let user_data = &self.upsert_user_all.user_data[0];
-
-        &user_data.access_code
-    }
-
-    fn displayed_id_type(&self) -> &str {
-        "access code"
-    }
-
-    fn to_tachi_import(
-        &self,
-        major_version: u16,
-        export_class: bool,
-        fail_over_lamp: bool,
-    ) -> Import {
-        let user_data = &self.upsert_user_all.user_data[0];
-
-        let classes = if export_class {
-            Some(ImportClasses {
-                dan: ClassEmblem::try_from(user_data.class_emblem_medal).ok(),
-                emblem: ClassEmblem::try_from(user_data.class_emblem_base).ok(),
-            })
-        } else {
-            None
-        };
-
-        let scores = self
-            .upsert_user_all
-            .user_playlog_list
-            .iter()
-            .filter_map(|playlog| {
-                let result = ImportScore::try_from_playlog(playlog, major_version, fail_over_lamp);
-                if result
-                    .as_ref()
-                    .is_ok_and(|v| v.difficulty != Difficulty::WorldsEnd)
-                {
-                    result.ok()
-                } else {
-                    None
-                }
-            })
-            .collect::<Vec<ImportScore>>();
-
-        Import {
-            classes,
-            scores,
-            ..Default::default()
-        }
-    }
-}

src/types/tachi/api.rs

@@ -0,0 +1,74 @@
+use serde::{de, Deserialize, Serialize};
+use serde_json::{Map, Value};
+
+#[derive(Debug, Clone)]
+pub enum TachiResponse<T> {
+    Ok(TachiSuccessResponse<T>),
+    Err(TachiFailureResponse),
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct TachiSuccessResponse<T> {
+    pub description: String,
+    pub body: T,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct TachiFailureResponse {
+    pub description: String,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum TachiApiPermission {
+    #[serde(rename = "customise_profile")]
+    CustomiseProfile,
+
+    #[serde(rename = "customise_score")]
+    CustomiseScore,
+
+    #[serde(rename = "customise_session")]
+    CustomiseSession,
+
+    #[serde(rename = "delete_score")]
+    DeleteScore,
+
+    #[serde(rename = "manage_challenges")]
+    ManageChallenges,
+
+    #[serde(rename = "manage_rivals")]
+    ManageRivals,
+
+    #[serde(rename = "manage_targets")]
+    ManageTargets,
+
+    #[serde(rename = "submit_score")]
+    SubmitScore,
+}
+
+impl<'de, T> Deserialize<'de> for TachiResponse<T>
+where
+    T: Deserialize<'de>,
+{
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let mut map = Map::deserialize(deserializer)?;
+        let success = map
+            .remove("success")
+            .ok_or_else(|| de::Error::missing_field("success"))
+            .map(Deserialize::deserialize)?
+            .map_err(de::Error::custom)?;
+        let rest = Value::Object(map);
+
+        if success {
+            TachiSuccessResponse::deserialize(rest)
+                .map(TachiResponse::Ok)
+                .map_err(de::Error::custom)
+        } else {
+            TachiFailureResponse::deserialize(rest)
+                .map(TachiResponse::Err)
+                .map_err(de::Error::custom)
+        }
+    }
+}

src/types/tachi/api_returns.rs

@@ -0,0 +1,40 @@
+use serde::{Deserialize, Serialize};
+
+use super::{api::TachiApiPermission, documents::ImportDocument};
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct ServerStatus {
+    pub whoami: Option<u32>,
+    pub permissions: Vec<TachiApiPermission>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct ImportDeferred {
+    pub url: String,
+
+    #[serde(rename = "importID")]
+    pub import_id: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ImportResponse {
+    Deferred(ImportDeferred),
+    Completed(ImportDocument),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct ImportProgress {
+    description: String,
+    value: i32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "importStatus")]
+pub enum ImportPollStatus {
+    #[serde(rename = "ongoing")]
+    Ongoing { progress: ImportProgress },
+
+    #[serde(rename = "completed")]
+    Completed { import: ImportDocument },
+}

src/types/tachi/batch_manual/class.rs

@@ -0,0 +1,33 @@
+use num_enum::TryFromPrimitive;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct BatchManualClasses {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub dan: Option<ClassEmblem>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub emblem: Option<ClassEmblem>,
+}
+
+#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
+#[repr(u32)]
+pub enum ClassEmblem {
+    #[serde(rename = "DAN_I")]
+    First = 1,
+
+    #[serde(rename = "DAN_II")]
+    Second = 2,
+
+    #[serde(rename = "DAN_III")]
+    Third = 3,
+
+    #[serde(rename = "DAN_IV")]
+    Fourth = 4,
+
+    #[serde(rename = "DAN_V")]
+    Fifth = 5,
+
+    #[serde(rename = "DAN_INFINITE")]
+    Infinite = 6,
+}

src/types/tachi/batch_manual/meta.rs

@@ -0,0 +1,18 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BatchManualMeta {
+    pub game: String,
+    pub playtype: String,
+    pub service: String,
+}
+
+impl Default for BatchManualMeta {
+    fn default() -> Self {
+        Self {
+            game: "chunithm".to_string(),
+            playtype: "Single".to_string(),
+            service: "Saekawa".to_string(),
+        }
+    }
+}

src/types/tachi/batch_manual/mod.rs

@@ -0,0 +1,16 @@
+pub mod class;
+pub mod meta;
+pub mod score;
+
+use serde::{Deserialize, Serialize};
+
+pub use self::{class::BatchManualClasses, meta::BatchManualMeta, score::BatchManualScore};
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct BatchManualImport {
+    pub meta: BatchManualMeta,
+    pub scores: Vec<BatchManualScore>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub classes: Option<BatchManualClasses>,
+}

src/types/tachi/batch_manual/score.rs

@@ -0,0 +1,105 @@
+use num_enum::TryFromPrimitive;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BatchManualScore {
+    pub match_type: MatchType,
+    pub identifier: String,
+    pub difficulty: Difficulty,
+    pub score: u32,
+    pub lamp: Lamp,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub judgements: Option<Judgements>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub time_achieved: Option<u128>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub optional: Option<OptionalMetrics>,
+}
+
+#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
+#[repr(u32)]
+pub enum Lamp {
+    #[serde(rename = "FAILED")]
+    Failed = 0,
+
+    #[serde(rename = "CLEAR")]
+    Clear = 1,
+
+    #[serde(rename = "FULL COMBO")]
+    FullCombo = 2,
+
+    #[serde(rename = "ALL JUSTICE")]
+    AllJustice = 3,
+
+    #[serde(rename = "ALL JUSTICE CRITICAL")]
+    AllJusticeCritical = 4,
+}
+
+#[derive(Debug, Clone, Eq, PartialEq, Serialize, Deserialize, TryFromPrimitive)]
+#[repr(u32)]
+pub enum Difficulty {
+    #[serde(rename = "BASIC")]
+    Basic = 0,
+
+    #[serde(rename = "ADVANCED")]
+    Advanced = 1,
+
+    #[serde(rename = "EXPERT")]
+    Expert = 2,
+
+    #[serde(rename = "MASTER")]
+    Master = 3,
+
+    #[serde(rename = "ULTIMA")]
+    Ultima = 4,
+
+    #[serde(rename = "WORLD'S END")]
+    WorldsEnd = 5,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum MatchType {
+    #[serde(rename = "bmsChartHash")]
+    BmsChartHash,
+
+    #[serde(rename = "itgChartHash")]
+    ItgChartHash,
+
+    #[serde(rename = "popnChartHash")]
+    PopnChartHash,
+
+    #[serde(rename = "uscChartHash")]
+    UscChartHash,
+
+    #[serde(rename = "inGameID")]
+    InGameId,
+
+    #[serde(rename = "inGameStrID")]
+    InGameStrId,
+
+    #[serde(rename = "sdvxInGameID")]
+    SdvxInGameId,
+
+    #[serde(rename = "songTitle")]
+    SongTitle,
+
+    #[serde(rename = "tachiSongID")]
+    TachiSongId,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct Judgements {
+    pub jcrit: u32,
+    pub justice: u32,
+    pub attack: u32,
+    pub miss: u32,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct OptionalMetrics {
+    pub max_combo: u32,
+}

src/types/tachi/documents.rs

@@ -0,0 +1,35 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum SessionType {
+    Appended,
+    Created,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct ImportErrContent {
+    #[serde(rename = "type")]
+    pub error_type: String,
+
+    pub message: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SessionInfoReturn {
+    #[serde(rename = "type")]
+    pub session_type: SessionType,
+
+    #[serde(rename = "sessionID")]
+    pub session_id: String,
+}
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct ImportDocument {
+    #[serde(rename = "scoreIDs")]
+    pub score_ids: Vec<String>,
+
+    pub errors: Vec<ImportErrContent>,
+
+    #[serde(rename = "createdSessions")]
+    pub created_sessions: Vec<SessionInfoReturn>,
+}

src/types/tachi/mod.rs

@@ -0,0 +1,4 @@
+pub mod api;
+pub mod api_returns;
+pub mod batch_manual;
+pub mod documents;

src/updater/external.rs

@@ -0,0 +1,94 @@
+use winapi::{
+    ctypes::c_void,
+    shared::{
+        minwindef::{BOOL, DWORD, HMODULE, LPVOID, PROC},
+        ntdef::{HANDLE, LPCWSTR, LPSTR},
+    },
+};
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut GET_MODULE_FILE_NAME_A_PTR: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut GET_PROCESS_HEAP_PTR: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut REPLCE_FILE_W_PTR: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut LOAD_LIBRARY_W_POINTER: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut HEAP_FREE_PTR: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut SLEEP_PTR: PROC = 0 as PROC;
+
+#[link_section = ".rtext"]
+#[used]
+pub static mut GET_LAST_ERROR_PTR: PROC = 0 as PROC;
+
+type GetModuleFileNameAFn = unsafe extern "system" fn(HMODULE, LPSTR, DWORD) -> DWORD;
+type GetProcessHeapFn = unsafe extern "system" fn() -> HANDLE;
+type ReplaceFileWFn =
+    unsafe extern "system" fn(LPCWSTR, LPCWSTR, LPCWSTR, DWORD, LPVOID, LPVOID) -> BOOL;
+type LoadLibraryWFn = unsafe extern "system" fn(LPCWSTR) -> HMODULE;
+type HeapFreeFn = unsafe extern "system" fn(HANDLE, DWORD, LPVOID) -> BOOL;
+type SleepFn = unsafe extern "system" fn(DWORD);
+
+#[repr(C)]
+pub struct ReplaceArgs {
+    pub module: HMODULE,
+    pub old: [u16; 32767],
+    pub new: [u16; 32767],
+}
+
+/// SAFETY: This function *must* only be called when the addresses for the function have been filled in.
+#[allow(non_snake_case)]
+#[link_section = ".rtext"]
+pub unsafe extern "system" fn replace_with_new_library(parameter: *const c_void) -> u32 {
+    let args = parameter as *const ReplaceArgs;
+    let GetModuleFileNameA =
+        std::mem::transmute::<_, GetModuleFileNameAFn>(GET_MODULE_FILE_NAME_A_PTR);
+    let GetProcessHeap = std::mem::transmute::<_, GetProcessHeapFn>(GET_PROCESS_HEAP_PTR);
+    let ReplaceFileW = std::mem::transmute::<_, ReplaceFileWFn>(REPLCE_FILE_W_PTR);
+    let LoadLibraryW = std::mem::transmute::<_, LoadLibraryWFn>(LOAD_LIBRARY_W_POINTER);
+    let HeapFree = std::mem::transmute::<_, HeapFreeFn>(HEAP_FREE_PTR);
+    let Sleep = std::mem::transmute::<_, SleepFn>(SLEEP_PTR);
+
+    // Wait for the old library to be freed
+    let mut filename = 0;
+
+    loop {
+        let result = GetModuleFileNameA((*args).module, &mut filename, 1);
+
+        if result == 0 {
+            break;
+        }
+
+        Sleep(1000);
+    }
+
+    let result = ReplaceFileW(
+        (*args).old.as_ptr(),
+        (*args).new.as_ptr(),
+        0 as *const _,
+        2,
+        0 as *mut c_void,
+        0 as *mut c_void,
+    );
+
+    if result > 0 {
+        LoadLibraryW((*args).old.as_ptr());
+    } else {
+        LoadLibraryW((*args).new.as_ptr());
+    }
+
+    HeapFree(GetProcessHeap(), 0, args as *mut _) as u32
+}

src/updater/mod.rs

@@ -0,0 +1,578 @@
+mod external;
+
+use std::{
+    ffi::CStr,
+    io::{self, Read},
+    mem::{self},
+    path::Path,
+    ptr,
+};
+
+use log::{debug, error, info};
+use serde::{Deserialize, Serialize};
+use sha2::{Digest, Sha256};
+use snafu::{prelude::Snafu, ResultExt};
+use widestring::U16CString;
+use winapi::{
+    shared::{
+        minwindef::{BOOL, DWORD, HMODULE, LPVOID, PROC},
+        ntdef::{LPCWSTR, LPSTR},
+        winerror::{
+            CERT_E_CHAINING, CERT_E_EXPIRED, CERT_E_UNTRUSTEDROOT, CRYPT_E_SECURITY_SETTINGS,
+            TRUST_E_EXPLICIT_DISTRUST, TRUST_E_NOSIGNATURE,
+        },
+    },
+    um::{
+        heapapi::HeapAlloc,
+        memoryapi::{VirtualAlloc, VirtualProtect},
+        minwinbase::LMEM_ZEROINIT,
+        processthreadsapi::CreateThread,
+        softpub::WINTRUST_ACTION_GENERIC_VERIFY_V2,
+        winbase::LocalAlloc,
+        wincrypt::{
+            CertCloseStore, CertFindCertificateInStore, CryptMsgClose, CryptMsgGetParam,
+            CryptQueryObject, CERT_FIND_SUBJECT_CERT, CERT_INFO,
+            CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED, CERT_QUERY_FORMAT_FLAG_BINARY,
+            CERT_QUERY_OBJECT_FILE, CMSG_SIGNER_INFO_PARAM, HCERTSTORE, HCRYPTMSG,
+            PCMSG_SIGNER_INFO, PKCS_7_ASN_ENCODING, X509_ASN_ENCODING,
+        },
+        winnt::{
+            HANDLE, HEAP_ZERO_MEMORY, IMAGE_DOS_HEADER, IMAGE_NT_HEADERS32, IMAGE_SECTION_HEADER,
+            MEM_COMMIT, MEM_RESERVE, PAGE_EXECUTE_READ, PAGE_READWRITE,
+        },
+        wintrust::{
+            WinVerifyTrust, WINTRUST_DATA, WINTRUST_FILE_INFO, WTD_CHOICE_FILE, WTD_REVOKE_NONE,
+            WTD_STATEACTION_VERIFY, WTD_UI_NONE,
+        },
+    },
+};
+
+use self::external::{replace_with_new_library, ReplaceArgs};
+use crate::helpers::winapi_ext::{get_module_file_name, LibraryHandle, ReadStringFnError};
+
+const PUBLIC_KEY: [u8; 270] = [
+    0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xf5, 0xbd, 0x02, 0xb0, 0x81, 0xc6, 0x4d,
+    0x4c, 0xa0, 0x40, 0xa8, 0x76, 0x78, 0xe2, 0x61, 0x39, 0x13, 0x1d, 0x2f, 0x0c, 0x70, 0x71, 0x96,
+    0x56, 0x67, 0xf2, 0xbe, 0xc2, 0x5c, 0xc7, 0xd4, 0xa6, 0xb5, 0x07, 0xc5, 0x7a, 0x19, 0x58, 0x10,
+    0x70, 0xb5, 0x87, 0x5f, 0x3f, 0x9a, 0x78, 0x9e, 0x96, 0x5c, 0xc7, 0x88, 0x50, 0x8c, 0x34, 0xcc,
+    0x51, 0xe5, 0xd5, 0xbd, 0xb8, 0xab, 0xed, 0x28, 0x7f, 0x68, 0x6e, 0x27, 0x2a, 0x1d, 0xdb, 0x9a,
+    0xe9, 0x1d, 0xbc, 0xd8, 0xbf, 0xca, 0xdf, 0x65, 0xa3, 0x0a, 0x19, 0x3d, 0x00, 0x14, 0x16, 0xdd,
+    0x87, 0x9f, 0xf5, 0x44, 0x9e, 0x56, 0x1e, 0xfd, 0xb5, 0xf0, 0x75, 0x3d, 0x11, 0x4c, 0x4d, 0xa5,
+    0x1a, 0x24, 0xfe, 0x31, 0x77, 0xc1, 0x55, 0xf7, 0x5d, 0x9c, 0x34, 0xbe, 0x5f, 0x9d, 0x73, 0x2c,
+    0x3e, 0xdb, 0x39, 0x18, 0x3c, 0xb3, 0x46, 0xe0, 0xf4, 0xa1, 0xcc, 0x2f, 0x7b, 0x07, 0xb7, 0x0e,
+    0x7a, 0x92, 0x54, 0xa9, 0x9f, 0xfc, 0x4c, 0xe0, 0xbb, 0xcf, 0xba, 0x36, 0xc6, 0xcb, 0x9d, 0xb1,
+    0x12, 0x4b, 0x50, 0x1c, 0x10, 0x23, 0x87, 0x28, 0x9b, 0x73, 0xe3, 0xd5, 0xc9, 0x38, 0xae, 0xd7,
+    0x66, 0x73, 0x8f, 0xf8, 0x56, 0x2e, 0x48, 0x0a, 0xdb, 0x7f, 0x11, 0xbf, 0xd6, 0x4e, 0x77, 0x6c,
+    0xb8, 0x12, 0xaf, 0x0b, 0x7b, 0x08, 0xe3, 0x0f, 0x7e, 0xf1, 0x6a, 0xc0, 0xac, 0x1c, 0xe2, 0x8c,
+    0x47, 0xb0, 0xec, 0x10, 0xca, 0x02, 0x9c, 0x7d, 0x27, 0x78, 0x33, 0x3c, 0x25, 0x88, 0x5c, 0x4f,
+    0x4b, 0xb8, 0x72, 0xeb, 0x85, 0x31, 0x39, 0xb1, 0x95, 0xae, 0xc3, 0x79, 0x38, 0x20, 0x25, 0x0e,
+    0xab, 0xdc, 0x9c, 0xc8, 0x25, 0x53, 0xd2, 0xcf, 0x93, 0xf0, 0x1d, 0x95, 0x58, 0x0b, 0x0c, 0x9f,
+    0xc5, 0x01, 0x7a, 0xad, 0x4f, 0x55, 0x2f, 0x24, 0xc5, 0x02, 0x03, 0x01, 0x00, 0x01,
+];
+
+// I don't know what the hell is going on with linking, but you have to link these manually,
+// otherwise you end up with the addresses to the intermediary functions, which obviously
+// doesn't exist once you unloads the original library.
+#[link(name = "kernel32")]
+extern "system" {
+    pub fn GetLastError() -> u32;
+    pub fn GetModuleFileNameA(hModule: HMODULE, lpFilename: LPSTR, nsize: DWORD) -> u32;
+    pub fn GetProcessHeap() -> HANDLE;
+    pub fn HeapFree(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID) -> BOOL;
+    pub fn LoadLibraryW(lpFileName: LPCWSTR) -> HMODULE;
+    pub fn ReplaceFileW(
+        lpReplacedFileName: LPCWSTR,
+        lpReplacementFileName: LPCWSTR,
+        lpBackupFileName: LPCWSTR,
+        dwReplaceFlags: DWORD,
+        lpExclude: LPVOID,
+        lpReserved: LPVOID,
+    ) -> BOOL;
+    pub fn Sleep(dwMilliseconds: DWORD);
+}
+
+#[derive(Debug, Snafu)]
+pub enum SelfUpdateError {
+    #[snafu(display("Could not get the file name of the currently running hook"))]
+    FailedToGetFilename { source: ReadStringFnError },
+
+    #[snafu(display("Invalid DOS signature"))]
+    InvalidDosSignature,
+
+    #[snafu(display("Invalid NT signature"))]
+    InvalidNtSignature,
+
+    #[snafu(display("Updater code section not found."))]
+    NoUpdaterCodeSection,
+
+    #[snafu(display("Failed to allocate memory for update"))]
+    FailedToAllocateMemory,
+
+    #[snafu(display("VirtualProtect failed with error code {errno}"))]
+    FailedVirtualProtect { errno: u32 },
+
+    #[snafu(display("Could not execute updater code: {errno}"))]
+    FailedCreateThread { errno: u32 },
+
+    #[snafu(display("Failed to request update information."))]
+    FailedRequestingUpdate { source: ureq::Error },
+
+    #[snafu(display("Invalid update information."))]
+    InvalidUpdateInformation { source: io::Error },
+
+    #[snafu(display("Could not download updated hook."))]
+    FailedDownloadingUpdate { source: io::Error },
+
+    #[snafu(display("Could not write updated hook to file."))]
+    FailedWritingUpdate { source: io::Error },
+
+    #[snafu(display("SHA-256 checksum mismatch."))]
+    InvalidChecksum,
+
+    #[snafu(display("Could not verify signature: {source:#}"))]
+    InvalidSignature { source: VerifySignatureError },
+
+    #[snafu(display("Failed to get digital signature of the update: {source:#?}"))]
+    FailedGettingPubkey { source: GetSignaturePubkeyError },
+
+    #[snafu(display("Public key mismatched."))]
+    InvalidPubkey,
+}
+
+#[derive(Snafu, Debug)]
+pub enum VerifySignatureError {
+    #[snafu(display("Signature verification was disabled by a local policy."))]
+    VerificationDisabledByPolicy,
+
+    #[snafu(display("No signatures found."))]
+    NoSignature,
+
+    #[snafu(display("The signature was explicitly distrusted."))]
+    ExplicitlyDistrusted,
+
+    #[snafu(display("An unknown validation error occured: {errno}"))]
+    Unknown { errno: i32 },
+}
+
+#[derive(Snafu, Debug)]
+pub enum GetSignaturePubkeyError {
+    #[snafu(display("CertQueryObject failed: {errno}"))]
+    QueryObjectError { errno: u32 },
+
+    #[snafu(display("Could not obtain size of signer information: {errno}"))]
+    SignerInfoSizeError { errno: u32 },
+
+    #[snafu(display("Could not allocate memory for signer information: {errno}"))]
+    SignerInfoAllocError { errno: u32 },
+
+    #[snafu(display("Could not obtain signer information: {errno}"))]
+    SignerInfoObtainError { errno: u32 },
+
+    #[snafu(display("Could not look up certificate in certificate store: {errno}"))]
+    CertificateInStoreError { errno: u32 },
+
+    #[snafu(display("Could not read public key."))]
+    ReadPubkeyError { source: io::Error },
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+struct UpdateInformation {
+    pub version: String,
+    pub commit: String,
+    pub sha256: String,
+}
+
+/// Checks if the hook has a newer version. Returns true if update was successful
+/// and the hook should uninject itself so a newer version can load in.
+pub fn self_update(module: &LibraryHandle) -> Result<bool, SelfUpdateError> {
+    let agent = ureq::builder()
+        .user_agent(concat!("saekawa/", env!("CARGO_PKG_VERSION")))
+        .build();
+
+    info!("Checking for updates...");
+    let response = agent
+        .get("https://beerpiss.github.io/saekawa/update.json")
+        .call()
+        .context(FailedRequestingUpdateSnafu)?
+        .into_json::<UpdateInformation>()
+        .context(InvalidUpdateInformationSnafu)?;
+
+    if response.commit == env!("VERGEN_GIT_SHA") {
+        info!("Already up-to-date.");
+
+        return Ok(false);
+    }
+
+    let module_filename =
+        &get_module_file_name(module.handle()).context(FailedToGetFilenameSnafu)?;
+    let module_path = Path::new(&module_filename);
+
+    debug!("Current hook is located at {module_filename:#?}.");
+
+    info!("Downloading update v{}...", response.version);
+    let url = format!(
+        "https://github.com/beerpiss/saekawa/releases/download/v{}/saekawa.dll",
+        response.version
+    );
+
+    debug!("Requesting content from {url}...");
+    let new_hook = {
+        let mut response = agent
+            .get(&url)
+            .call()
+            .context(FailedRequestingUpdateSnafu)?
+            .into_reader();
+        let mut buf = vec![];
+        response
+            .read_to_end(&mut buf)
+            .context(FailedDownloadingUpdateSnafu)?;
+
+        buf
+    };
+
+    debug!("Validating update contents...");
+    validate_sha256(&new_hook, &response.sha256)?;
+
+    let new_module_path = module_path.with_file_name("saekawa.new.dll");
+
+    debug!("Writing update contents to {new_module_path:#?}...");
+    std::fs::write(&new_module_path, new_hook).context(FailedWritingUpdateSnafu)?;
+
+    debug!("Verifying digital signature...");
+    let new_module_filename = new_module_path.to_string_lossy();
+    verify_signature(&new_module_filename).context(InvalidSignatureSnafu)?;
+
+    debug!("Verifying certificate public key...");
+    let actual_pubkey = match get_signature_pubkey(&new_module_filename) {
+        Ok(k) => k,
+        Err(e) => {
+            let _ = std::fs::remove_file(&new_module_path);
+            return Err(SelfUpdateError::FailedGettingPubkey { source: e });
+        }
+    };
+
+    if actual_pubkey != PUBLIC_KEY {
+        let _ = std::fs::remove_file(&new_module_path);
+        return Err(SelfUpdateError::InvalidPubkey);
+    }
+
+    debug!("Starting update sequence");
+    // You know stuff is going to be cursed when the unsafe block is ~120 lines long.
+    //
+    // TL;DR: There's a function that waits until the current hook has been unloaded,
+    // then replaces the old hook with the new hook, and loads in the new hook.
+    //
+    // This is achieved by linking that function alongside the required functions in a different
+    // code section (".rtext"), setting references for those functions, then copying out
+    // that entire section to a different memory region so it can keep executing when the
+    // old hook is unloaded.
+    //
+    // Thanks to DJTRACKERS and their fervidex hook for the approach.
+    unsafe {
+        external::GET_LAST_ERROR_PTR = GetLastError as PROC;
+        external::GET_MODULE_FILE_NAME_A_PTR = GetModuleFileNameA as PROC;
+        external::GET_PROCESS_HEAP_PTR = GetProcessHeap as PROC;
+        external::HEAP_FREE_PTR = HeapFree as PROC;
+        external::LOAD_LIBRARY_W_POINTER = LoadLibraryW as PROC;
+        external::REPLCE_FILE_W_PTR = ReplaceFileW as PROC;
+        external::SLEEP_PTR = Sleep as PROC;
+
+        debug!("Locating updater code...");
+        let dos_header = module.handle() as *const IMAGE_DOS_HEADER;
+
+        if (*dos_header).e_magic != 0x5A4D {
+            return Err(SelfUpdateError::InvalidDosSignature);
+        }
+
+        let nt_header_address = module.handle().byte_offset((*dos_header).e_lfanew as isize);
+        let nt_header = nt_header_address as *const IMAGE_NT_HEADERS32;
+
+        if (*nt_header).Signature != 0x4550 {
+            return Err(SelfUpdateError::InvalidNtSignature);
+        }
+
+        let number_of_sections = (*nt_header).FileHeader.NumberOfSections;
+
+        if number_of_sections < 5 {
+            return Err(SelfUpdateError::NoUpdaterCodeSection);
+        }
+
+        let section_header_offset = (&(*nt_header).OptionalHeader as *const _ as *const u8)
+            .byte_add((*nt_header).FileHeader.SizeOfOptionalHeader as usize)
+            as *const IMAGE_SECTION_HEADER;
+
+        for i in 0..number_of_sections {
+            let section_header = *section_header_offset.byte_add(40 * i as usize);
+            let section_name = CStr::from_bytes_until_nul(&section_header.Name)
+                .unwrap()
+                .to_str()
+                .unwrap();
+
+            if section_name != ".rtext" {
+                continue;
+            }
+
+            let src_addr = module
+                .handle()
+                .byte_add(section_header.VirtualAddress as usize)
+                as *mut u8;
+            let section_size = *section_header.Misc.VirtualSize() as usize;
+
+            let dst_addr = VirtualAlloc(
+                ptr::null_mut(),
+                section_size,
+                MEM_COMMIT | MEM_RESERVE,
+                PAGE_READWRITE,
+            ) as *mut u8;
+
+            if dst_addr.is_null() {
+                return Err(SelfUpdateError::FailedToAllocateMemory);
+            }
+
+            debug!(
+                "Copying updater code section from {:p} to {:p}",
+                src_addr, dst_addr
+            );
+            std::ptr::copy_nonoverlapping(src_addr, dst_addr, section_size);
+
+            let updater_start_address = (replace_with_new_library as PROC)
+                .byte_add(dst_addr as usize)
+                .byte_sub(src_addr as usize);
+
+            debug!("Making updater code executable");
+            let mut old_protect = 0u32;
+            let result = VirtualProtect(
+                dst_addr as *mut _,
+                section_size,
+                PAGE_EXECUTE_READ,
+                &mut old_protect,
+            );
+
+            if result == 0 {
+                return Err(SelfUpdateError::FailedVirtualProtect {
+                    errno: GetLastError(),
+                });
+            }
+
+            let process_heap = GetProcessHeap();
+            let heap = HeapAlloc(
+                process_heap,
+                HEAP_ZERO_MEMORY,
+                mem::size_of::<ReplaceArgs>(),
+            ) as *mut ReplaceArgs;
+
+            debug!("Allocated heap for updater code at {heap:p}");
+
+            (*heap).module = module.handle();
+            let old = U16CString::from_str_truncate(&module_filename);
+            let new = U16CString::from_str_truncate(&new_module_path.to_string_lossy());
+            std::ptr::copy_nonoverlapping(
+                old.as_ptr(),
+                (*heap).old.as_mut_ptr(),
+                old.as_slice().len(),
+            );
+            std::ptr::copy_nonoverlapping(
+                new.as_ptr(),
+                (*heap).new.as_mut_ptr(),
+                new.as_slice().len(),
+            );
+
+            debug!("Executing updater code at {updater_start_address:p}");
+            let handle = CreateThread(
+                ptr::null_mut(),
+                0,
+                Some(std::mem::transmute(updater_start_address)),
+                heap as *mut _,
+                0,
+                ptr::null_mut(),
+            );
+
+            if handle.is_null() {
+                error!("Could not execute updater code: {}", GetLastError());
+                return Err(SelfUpdateError::FailedCreateThread {
+                    errno: GetLastError(),
+                });
+            }
+
+            return Ok(true);
+        }
+
+        return Err(SelfUpdateError::NoUpdaterCodeSection);
+    }
+}
+
+fn validate_sha256(data: &[u8], expected: &str) -> Result<(), SelfUpdateError> {
+    let mut hasher = Sha256::new();
+
+    hasher.update(data);
+
+    let hash = hasher.finalize();
+    let hash_string = faster_hex::hex_string(&hash[..]);
+
+    debug!("Expected checksum: {}", expected);
+    debug!("Actual checksum: {}", hash_string);
+
+    if hash_string != expected {
+        return Err(SelfUpdateError::InvalidChecksum);
+    }
+
+    Ok(())
+}
+
+fn verify_signature(file: &str) -> Result<(), VerifySignatureError> {
+    let file_osstr = U16CString::from_str_truncate(file);
+    let mut verification_type = WINTRUST_ACTION_GENERIC_VERIFY_V2;
+    let mut wintrust_data_buf = vec![0u8; mem::size_of::<WINTRUST_DATA>()];
+    let mut fileinfo_buf = vec![0u8; mem::size_of::<WINTRUST_FILE_INFO>()];
+
+    unsafe {
+        let fileinfo = fileinfo_buf.as_mut_ptr() as *mut WINTRUST_FILE_INFO;
+        let wintrust_data = wintrust_data_buf.as_mut_ptr() as *mut WINTRUST_DATA;
+
+        (*fileinfo).cbStruct = mem::size_of::<WINTRUST_FILE_INFO>() as u32;
+        (*fileinfo).pcwszFilePath = file_osstr.as_ptr();
+        (*fileinfo).hFile = ptr::null_mut();
+        (*fileinfo).pgKnownSubject = ptr::null_mut();
+
+        (*wintrust_data).pPolicyCallbackData = ptr::null_mut();
+        (*wintrust_data).pSIPClientData = ptr::null_mut();
+        (*wintrust_data).cbStruct = mem::size_of::<WINTRUST_DATA>() as u32;
+        (*wintrust_data).dwStateAction = WTD_STATEACTION_VERIFY;
+        (*wintrust_data).dwUIChoice = WTD_UI_NONE;
+        (*wintrust_data).fdwRevocationChecks = WTD_REVOKE_NONE;
+        (*wintrust_data).dwUnionChoice = WTD_CHOICE_FILE;
+        (*wintrust_data).hWVTStateData = ptr::null_mut();
+        (*wintrust_data).pwszURLReference = ptr::null_mut();
+        (*wintrust_data).dwUIContext = 0;
+        *(*wintrust_data).u.pFile_mut() = fileinfo;
+
+        let status = WinVerifyTrust(
+            ptr::null_mut(),
+            &mut verification_type,
+            wintrust_data as *mut _,
+        );
+
+        match status {
+            0 | CERT_E_UNTRUSTEDROOT | CERT_E_EXPIRED | CERT_E_CHAINING => Ok(()),
+            CRYPT_E_SECURITY_SETTINGS => Err(VerifySignatureError::VerificationDisabledByPolicy),
+            TRUST_E_NOSIGNATURE => Err(VerifySignatureError::NoSignature),
+            TRUST_E_EXPLICIT_DISTRUST => Err(VerifySignatureError::ExplicitlyDistrusted),
+            _ => Err(VerifySignatureError::Unknown { errno: status }),
+        }
+    }
+}
+
+fn get_signature_pubkey(file: &str) -> Result<Vec<u8>, GetSignaturePubkeyError> {
+    debug!("Getting public key of {file}.");
+
+    let file_osstr = U16CString::from_str_truncate(file);
+    let mut cert_store: HCERTSTORE = ptr::null_mut();
+    let mut crypt_msg: HCRYPTMSG = ptr::null_mut();
+    let result = unsafe {
+        CryptQueryObject(
+            CERT_QUERY_OBJECT_FILE,
+            file_osstr.as_ptr() as *const _,
+            CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
+            CERT_QUERY_FORMAT_FLAG_BINARY,
+            0,
+            ptr::null_mut(),
+            ptr::null_mut(),
+            ptr::null_mut(),
+            &mut cert_store,
+            &mut crypt_msg,
+            ptr::null_mut(),
+        )
+    };
+
+    if result == 0 {
+        return Err(GetSignaturePubkeyError::QueryObjectError {
+            errno: unsafe { GetLastError() },
+        });
+    }
+
+    let mut signer_info_length = 0;
+    let result = unsafe {
+        CryptMsgGetParam(
+            crypt_msg,
+            CMSG_SIGNER_INFO_PARAM,
+            0,
+            ptr::null_mut(),
+            &mut signer_info_length,
+        )
+    };
+
+    if result == 0 {
+        return Err(GetSignaturePubkeyError::SignerInfoSizeError {
+            errno: unsafe { GetLastError() },
+        });
+    }
+
+    let signer_info =
+        unsafe { LocalAlloc(LMEM_ZEROINIT, signer_info_length as usize) } as PCMSG_SIGNER_INFO;
+
+    if signer_info.is_null() {
+        return Err(GetSignaturePubkeyError::SignerInfoAllocError {
+            errno: unsafe { GetLastError() },
+        });
+    }
+
+    let result = unsafe {
+        CryptMsgGetParam(
+            crypt_msg,
+            CMSG_SIGNER_INFO_PARAM,
+            0,
+            signer_info as *mut _,
+            &mut signer_info_length,
+        )
+    };
+
+    if result == 0 {
+        return Err(GetSignaturePubkeyError::SignerInfoObtainError {
+            errno: unsafe { GetLastError() },
+        });
+    }
+
+    let mut cert_search_params_buf = vec![0u8; mem::size_of::<CERT_INFO>()];
+    let cert_search_params = cert_search_params_buf.as_mut_ptr() as *mut CERT_INFO;
+
+    unsafe {
+        (*cert_search_params).Issuer = (*signer_info).Issuer;
+        (*cert_search_params).SerialNumber = (*signer_info).SerialNumber;
+    }
+
+    let cert = unsafe {
+        CertFindCertificateInStore(
+            cert_store,
+            X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
+            0,
+            CERT_FIND_SUBJECT_CERT,
+            cert_search_params as *const _,
+            ptr::null(),
+        )
+    };
+
+    if cert.is_null() {
+        return Err(GetSignaturePubkeyError::CertificateInStoreError {
+            errno: unsafe { GetLastError() },
+        });
+    }
+
+    unsafe {
+        let cert_info = (*cert).pCertInfo;
+        let cbb = (*cert_info).SubjectPublicKeyInfo.PublicKey;
+        let public_key_length = cbb.cbData;
+        let public_key = cbb.pbData;
+        let mut public_key =
+            std::slice::from_raw_parts(public_key as *const _, public_key_length as _);
+        let mut pubkey_vec = Vec::with_capacity(public_key_length as _);
+
+        public_key
+            .read_to_end(&mut pubkey_vec)
+            .context(ReadPubkeySnafu)?;
+
+        CertCloseStore(cert_store, 0);
+        CryptMsgClose(crypt_msg);
+
+        Ok(pubkey_vec)
+    }
+}