injectionforge/src/lib.rs

pub mod injector;
#[cfg(feature = "frida")]
pub mod frida_handler;

pub use injector::{attach, attach_self};

#[cfg(all(unix, not(test)))]
use ctor::ctor;

#[cfg(all(unix, not(test)))]
#[ctor]
fn _start() {
	println!("[+] frida-deepfreeze-rs library injected");
	attach_self();
}

// For some reason ctor doesn't work on Windows - it hangs the process
// during DeviceManager::obtain. DllMain works fine though.
#[cfg(all(windows, not(test)))]
use std::ffi::c_void;
#[cfg(all(windows, not(test)))]
use winapi::um::winnt::DLL_PROCESS_ATTACH;

#[cfg(all(windows, feature = "dll_proxy", not(test)))]
use winapi::um::libloaderapi::LoadLibraryA;

#[cfg(all(windows, not(test)))]
#[no_mangle]
#[allow(non_snake_case, unused_variables)]
extern "system" fn DllMain(dll_module: *mut c_void, call_reason: u32, _: *mut ()) -> bool {
	match call_reason {
		DLL_PROCESS_ATTACH => {
			println!("[+] frida-deepfreeze-rs DLL injected");

			#[cfg(feature = "dll_proxy")]
			{
				unsafe { LoadLibraryA(env!("LIB_NAME").as_ptr() as *const i8); }
				println!("[+] Original DLL {} loaded", env!("LIB_NAME"));
			}

			attach_self();
		}
		// Maybe we should detach? Is it useful?
		_ => ()
	}

	true
}

#[cfg(test)]
mod tests {
	use pretty_assertions::assert_eq;
	use std::process::Command;
	use std::fs;

	#[test]
	#[cfg(feature = "frida")]
	fn test_frida_on_load() {
		let lib_status = Command::new("cargo")
			.arg("build")
			.arg("--lib")
			.arg("--target-dir")
			.arg("target/test_frida_on_load")
			.env("FRIDA_CODE", r#"
				const foo = Module.getExportByName(null, "mylib_foo");
				Interceptor.replace(foo, new NativeCallback(function () {
					console.log("replaced foo() called");
					return 40;
				}, "uint8", []));
			"#)
			.status()
			.expect("Failed to build dynamic library");

		assert!(lib_status.success(), "Failed to build dynamic library");

		let bin_status = Command::new("cargo")
			.arg("run")
			.arg("--manifest-path")
			.arg("tests/mybin/Cargo.toml")
			.arg("--target-dir")
			.arg("target/test_frida_on_load")
			.env("RUSTFLAGS", "-C link-arg=-Wl,--no-as-needed -C link-arg=-lfrida_deepfreeze_rs")
			.status()
			.expect("Failed to build mybin");

		assert_eq!(bin_status.code().unwrap(), 40, "Failed to replace foo()");
		// assert_eq!(40, unsafe { mylib_foo() });

// 		escargot::CargoBuild::new()
// 			.current_release()
// 			.current_target()
// 			.env("FRIDA_CODE", r#"
// 				const foo = Module.getExportByName(null, "mylib_foo");
// 				Interceptor.replace(foo, new NativeCallback(function () {
// 					console.log("replaced foo() called");
// 					return 20;
// 				}, "uint8", []));
// 			"#)
// 			.manifest_path("../../Cargo.toml")
// 			.run()
// 			.unwrap();
	}
}