add fuzz target for BlindedMessagePath

Adds fuzz target for BlindedMessagePath that implements `Readable` to check for correct deserialisation

Author: Prabhat1308

fuzz/src/bin/gen_target.sh

@@ -82,3 +82,5 @@ GEN_TEST msg_stfu msg_targets::
 GEN_TEST msg_splice_init msg_targets::
 GEN_TEST msg_splice_ack msg_targets::
 GEN_TEST msg_splice_locked msg_targets::
+
+GEN_TEST msg_blinded_message_path msg_targets::

fuzz/src/bin/msg_blinded_message_path_target.rs

@@ -0,0 +1,120 @@
+// This file is Copyright its original authors, visible in version control
+// history.
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
+// This file is auto-generated by gen_target.sh based on target_template.txt
+// To modify it, modify target_template.txt and run gen_target.sh instead.
+
+#![cfg_attr(feature = "libfuzzer_fuzz", no_main)]
+#![cfg_attr(rustfmt, rustfmt_skip)]
+
+#[cfg(not(fuzzing))]
+compile_error!("Fuzz targets need cfg=fuzzing");
+
+#[cfg(not(hashes_fuzz))]
+compile_error!("Fuzz targets need cfg=hashes_fuzz");
+
+#[cfg(not(secp256k1_fuzz))]
+compile_error!("Fuzz targets need cfg=secp256k1_fuzz");
+
+extern crate lightning_fuzz;
+use lightning_fuzz::msg_targets::msg_blinded_message_path::*;
+
+#[cfg(feature = "afl")]
+#[macro_use] extern crate afl;
+#[cfg(feature = "afl")]
+fn main() {
+	fuzz!(|data| {
+		msg_blinded_message_path_run(data.as_ptr(), data.len());
+	});
+}
+
+#[cfg(feature = "honggfuzz")]
+#[macro_use] extern crate honggfuzz;
+#[cfg(feature = "honggfuzz")]
+fn main() {
+	loop {
+		fuzz!(|data| {
+			msg_blinded_message_path_run(data.as_ptr(), data.len());
+		});
+	}
+}
+
+#[cfg(feature = "libfuzzer_fuzz")]
+#[macro_use] extern crate libfuzzer_sys;
+#[cfg(feature = "libfuzzer_fuzz")]
+fuzz_target!(|data: &[u8]| {
+	msg_blinded_message_path_run(data.as_ptr(), data.len());
+});
+
+#[cfg(feature = "stdin_fuzz")]
+fn main() {
+	use std::io::Read;
+
+	let mut data = Vec::with_capacity(8192);
+	std::io::stdin().read_to_end(&mut data).unwrap();
+	msg_blinded_message_path_run(data.as_ptr(), data.len());
+}
+
+#[test]
+fn run_test_cases() {
+	use std::fs;
+	use std::io::Read;
+	use lightning_fuzz::utils::test_logger::StringBuffer;
+
+	use std::sync::{atomic, Arc};
+	{
+		let data: Vec<u8> = vec![0];
+		msg_blinded_message_path_run(data.as_ptr(), data.len());
+	}
+	let mut threads = Vec::new();
+	let threads_running = Arc::new(atomic::AtomicUsize::new(0));
+	if let Ok(tests) = fs::read_dir("test_cases/msg_blinded_message_path") {
+		for test in tests {
+			let mut data: Vec<u8> = Vec::new();
+			let path = test.unwrap().path();
+			fs::File::open(&path).unwrap().read_to_end(&mut data).unwrap();
+			threads_running.fetch_add(1, atomic::Ordering::AcqRel);
+
+			let thread_count_ref = Arc::clone(&threads_running);
+			let main_thread_ref = std::thread::current();
+			threads.push((path.file_name().unwrap().to_str().unwrap().to_string(),
+				std::thread::spawn(move || {
+					let string_logger = StringBuffer::new();
+
+					let panic_logger = string_logger.clone();
+					let res = if ::std::panic::catch_unwind(move || {
+						msg_blinded_message_path_test(&data, panic_logger);
+					}).is_err() {
+						Some(string_logger.into_string())
+					} else { None };
+					thread_count_ref.fetch_sub(1, atomic::Ordering::AcqRel);
+					main_thread_ref.unpark();
+					res
+				})
+			));
+			while threads_running.load(atomic::Ordering::Acquire) > 32 {
+				std::thread::park();
+			}
+		}
+	}
+	let mut failed_outputs = Vec::new();
+	for (test, thread) in threads.drain(..) {
+		if let Some(output) = thread.join().unwrap() {
+			println!("\nOutput of {}:\n{}\n", test, output);
+			failed_outputs.push(test);
+		}
+	}
+	if !failed_outputs.is_empty() {
+		println!("Test cases which failed: ");
+		for case in failed_outputs {
+			println!("{}", case);
+		}
+		panic!();
+	}
+}

fuzz/src/msg_targets/gen_target.sh

@@ -72,3 +72,5 @@ GEN_TEST lightning::ln::msgs::Stfu test_msg_simple ""
 GEN_TEST lightning::ln::msgs::SpliceInit test_msg_simple ""
 GEN_TEST lightning::ln::msgs::SpliceAck test_msg_simple ""
 GEN_TEST lightning::ln::msgs::SpliceLocked test_msg_simple ""
+
+GEN_TEST lightning::blinded_path::message::BlindedMessagePath test_msg_simple ""

fuzz/src/msg_targets/mod.rs

@@ -48,3 +48,4 @@ pub mod msg_stfu;
 pub mod msg_splice_init;
 pub mod msg_splice_ack;
 pub mod msg_splice_locked;
+pub mod msg_blinded_message_path;

fuzz/src/msg_targets/msg_blinded_message_path.rs

@@ -0,0 +1,27 @@
+// This file is Copyright its original authors, visible in version control
+// history.
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
+// This file is auto-generated by gen_target.sh based on msg_target_template.txt
+// To modify it, modify msg_target_template.txt and run gen_target.sh instead.
+
+#![cfg_attr(rustfmt, rustfmt_skip)]
+
+use crate::msg_targets::utils::VecWriter;
+use crate::utils::test_logger;
+
+#[inline]
+pub fn msg_blinded_message_path_test<Out: test_logger::Output>(data: &[u8], _out: Out) {
+	test_msg_simple!(lightning::blinded_path::message::BlindedMessagePath, data);
+}
+
+#[no_mangle]
+pub extern "C" fn msg_blinded_message_path_run(data: *const u8, datalen: usize) {
+	let data = unsafe { std::slice::from_raw_parts(data, datalen) };
+	test_msg_simple!(lightning::blinded_path::message::BlindedMessagePath, data);
+}

fuzz/targets.h

@@ -67,3 +67,4 @@ void msg_stfu_run(const unsigned char* data, size_t data_len);
 void msg_splice_init_run(const unsigned char* data, size_t data_len);
 void msg_splice_ack_run(const unsigned char* data, size_t data_len);
 void msg_splice_locked_run(const unsigned char* data, size_t data_len);
+void msg_blinded_message_path_run(const unsigned char* data, size_t data_len);