initial

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
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+]
+
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+]
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+ "brotli",
+ "object",
+]
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Cargo.toml

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+[package]
+name = "tauriunpack"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+brotli = "8"
+object = "0.37"

src/main.rs

@@ -0,0 +1,99 @@
+use std::{
+    env,
+    error::Error,
+    fmt, fs,
+    io::{Cursor, Read},
+    path::PathBuf,
+};
+
+use object::{Object, ObjectSection, read::pe::PeFile64};
+
+type Result<T> = std::result::Result<T, Box<dyn Error>>;
+
+#[derive(Debug)]
+enum MyError {
+    NoParentDir,
+    NoSection,
+    NoData,
+}
+impl fmt::Display for MyError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::NoParentDir => write!(f, "no parent dir for path"),
+            Self::NoSection => write!(f, "no section found"),
+            Self::NoData => write!(f, "no data"),
+        }
+    }
+}
+impl Error for MyError {}
+
+fn next_u64_le(r: &mut impl Read) -> Result<u64> {
+    let mut b = [0u8; 8];
+    r.read_exact(&mut b)?;
+    Ok(u64::from_le_bytes(b))
+}
+
+fn main() -> Result<()> {
+    // read args
+    let mut args = env::args().skip(1);
+    let table_base: u64 = args
+        .next()
+        .and_then(|s| u64::from_str_radix(&s, 16).ok())
+        .expect("no table base provided");
+    let table_len: u64 = args
+        .next()
+        .and_then(|s| s.parse().ok())
+        .expect("no table len provided");
+    let path = args.next().expect("no *.exe provided");
+
+    // read file
+    let data = fs::read(path)?;
+
+    // parse file
+    let file = PeFile64::parse(&*data)?;
+
+    // find section
+    let section = file
+        .sections()
+        .find(|s| (s.address()..s.address() + s.size()).contains(&table_base))
+        .ok_or(MyError::NoSection)?;
+
+    // dump table
+    for i in 0..table_len {
+        // get entry
+        let ptr_entry = table_base + 32 * i;
+        let entry = section.data_range(ptr_entry, 32)?.ok_or(MyError::NoData)?;
+
+        // parse entry
+        let mut c = Cursor::new(entry);
+        let ptr_name = next_u64_le(&mut c)?;
+        let len_name = next_u64_le(&mut c)?;
+        let ptr_data = next_u64_le(&mut c)?;
+        let len_data = next_u64_le(&mut c)?;
+
+        // read name/data
+        let name = section
+            .data_range(ptr_name, len_name)?
+            .ok_or(MyError::NoData)?;
+        let data = section
+            .data_range(ptr_data, len_data)?
+            .ok_or(MyError::NoData)?;
+
+        // print name
+        let mut name = String::from_utf8(name.to_vec())?;
+        println!("saving {name}");
+
+        // make path
+        let mut p = PathBuf::from("./save");
+        name.insert(0, '.');
+        p.push(name);
+
+        // open file
+        let parent = p.parent().ok_or(MyError::NoParentDir)?;
+        fs::create_dir_all(parent)?;
+        let mut file = fs::File::create_new(p)?;
+        brotli::BrotliDecompress(&mut &data[..], &mut file)?;
+    }
+
+    Ok(())
+}