Fix message targets to not have an internal loop

Author: TheBlueMatt

fuzz/fuzz_targets/msg_targets/msg_accept_channel_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::AcceptChannel, data, read_pos);
-	}
+	test_msg!(msgs::AcceptChannel, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_closing_signed_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::ClosingSigned, data, read_pos);
-	}
+	test_msg!(msgs::ClosingSigned, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_commitment_signed_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::CommitmentSigned, data, read_pos);
-	}
+	test_msg!(msgs::CommitmentSigned, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_funding_created_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::FundingCreated, data, read_pos);
-	}
+	test_msg!(msgs::FundingCreated, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_funding_locked_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::FundingLocked, data, read_pos);
-	}
+	test_msg!(msgs::FundingLocked, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_funding_signed_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::FundingSigned, data, read_pos);
-	}
+	test_msg!(msgs::FundingSigned, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_open_channel_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::OpenChannel, data, read_pos);
-	}
+	test_msg!(msgs::OpenChannel, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_revoke_and_ack_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::RevokeAndACK, data, read_pos);
-	}
+	test_msg!(msgs::RevokeAndACK, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_shutdown_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::Shutdown, data, read_pos);
-	}
+	test_msg!(msgs::Shutdown, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_target_template.txt

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::MSG_TARGET, data, read_pos);
-	}
+	test_msg!(msgs::MSG_TARGET, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_update_add_htlc_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::UpdateAddHTLC, data, read_pos);
-	}
+	test_msg!(msgs::UpdateAddHTLC, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_update_fail_htlc_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::UpdateFailHTLC, data, read_pos);
-	}
+	test_msg!(msgs::UpdateFailHTLC, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_update_fail_malformed_htlc_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::UpdateFailMalformedHTLC, data, read_pos);
-	}
+	test_msg!(msgs::UpdateFailMalformedHTLC, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_update_fee_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::UpdateFee, data, read_pos);
-	}
+	test_msg!(msgs::UpdateFee, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/msg_update_fulfill_htlc_target.rs

@@ -9,15 +9,11 @@ use lightning::util::reset_rng_state;
 use lightning::ln::msgs::{MsgEncodable, MsgDecodable};
 
 mod utils;
-use utils::slice_to_be16;
 
 #[inline]
 pub fn do_test(data: &[u8]) {
 	reset_rng_state();
-	let mut read_pos = 0;
-	loop {
-		test_msg!(msgs::UpdateFulfillHTLC, data, read_pos);
-	}
+	test_msg!(msgs::UpdateFulfillHTLC, data);
 }
 
 #[cfg(feature = "afl")]

fuzz/fuzz_targets/msg_targets/utils.rs

@@ -1,50 +1,13 @@
 #![macro_use]
 
-#[allow(dead_code)]
-#[inline]
-pub fn slice_to_be16(v: &[u8]) -> u16 {
-	((v[0] as u16) << 8*1) |
-	((v[1] as u16) << 8*0)
-}
-
 #[macro_export]
 macro_rules! test_msg {
-	($MsgType: path, $data: ident, $read_pos: ident) => {
-		{
-			let len = slice_to_be16(get_slice!($data, $read_pos, 2));
-			let raw = get_slice!($data, $read_pos, len);
-			let cb = decode_msg!($MsgType, raw).encode();
-			assert_eq!(&raw[..cb.len()], &cb[..]);
-		}
-	}
-}
-
-#[macro_export]
-macro_rules! decode_msg {
-	($MsgType: path, $data: expr) => {
-		match <($MsgType)>::decode($data) {
-			Ok(msg) => msg,
-			Err(e) => match e {
-				msgs::DecodeError::UnknownRealmByte => return,
-				msgs::DecodeError::BadPublicKey => return,
-				msgs::DecodeError::BadSignature => return,
-				msgs::DecodeError::ExtraAddressesPerType => return,
-				msgs::DecodeError::WrongLength => return,
-			}
-		}
-	}
-}
-
-#[macro_export]
-macro_rules! get_slice {
-	($data: ident, $read_pos: ident, $len: expr) => {
+	($MsgType: path, $data: ident) => {
 		{
-			let slice_len = $len as usize;
-			if $data.len() < $read_pos + slice_len {
-				return;
+			if let Ok(msg) = <$MsgType as MsgDecodable>::decode($data){
+				let enc = msg.encode();
+				assert_eq!(&$data[..enc.len()], &enc[..]);
 			}
-			$read_pos += slice_len;
-			&$data[$read_pos - slice_len..$read_pos]
 		}
 	}
 }