Fuzz test for parsing Refund

[rust-lightning] / fuzz / src / refund_deser.rs

diff --git a/fuzz/src/refund_deser.rs b/fuzz/src/refund_deser.rs
new file mode 100644 (file)
index 0000000..9adaa3e
--- /dev/null
+++ b/fuzz/src/refund_deser.rs
@@ -0,0 +1,101 @@
+// 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.
+
+use bitcoin::secp256k1::{KeyPair, PublicKey, Secp256k1, SecretKey, self};
+use crate::utils::test_logger;
+use core::convert::{Infallible, TryFrom};
+use lightning::chain::keysinterface::EntropySource;
+use lightning::ln::PaymentHash;
+use lightning::ln::features::BlindedHopFeatures;
+use lightning::offers::invoice::{BlindedPayInfo, UnsignedInvoice};
+use lightning::offers::parse::SemanticError;
+use lightning::offers::refund::Refund;
+use lightning::onion_message::BlindedPath;
+use lightning::util::ser::Writeable;
+
+#[inline]
+pub fn do_test<Out: test_logger::Output>(data: &[u8], _out: Out) {
+       if let Ok(refund) = Refund::try_from(data.to_vec()) {
+               let mut bytes = Vec::with_capacity(data.len());
+               refund.write(&mut bytes).unwrap();
+               assert_eq!(data, bytes);
+
+               let secp_ctx = Secp256k1::new();
+               let keys = KeyPair::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+               let pubkey = PublicKey::from(keys);
+               let mut buffer = Vec::new();
+
+               if let Ok(invoice) = build_response(&refund, pubkey, &secp_ctx) {
+                       invoice
+                               .sign::<_, Infallible>(
+                                       |digest| Ok(secp_ctx.sign_schnorr_no_aux_rand(digest, &keys))
+                               )
+                               .unwrap()
+                               .write(&mut buffer)
+                               .unwrap();
+               }
+       }
+}
+
+struct Randomness;
+
+impl EntropySource for Randomness {
+       fn get_secure_random_bytes(&self) -> [u8; 32] { [42; 32] }
+}
+
+fn pubkey(byte: u8) -> PublicKey {
+       let secp_ctx = Secp256k1::new();
+       PublicKey::from_secret_key(&secp_ctx, &privkey(byte))
+}
+
+fn privkey(byte: u8) -> SecretKey {
+       SecretKey::from_slice(&[byte; 32]).unwrap()
+}
+
+fn build_response<'a, T: secp256k1::Signing + secp256k1::Verification>(
+       refund: &'a Refund, signing_pubkey: PublicKey, secp_ctx: &Secp256k1<T>
+) -> Result<UnsignedInvoice<'a>, SemanticError> {
+       let entropy_source = Randomness {};
+       let paths = vec![
+               BlindedPath::new(&[pubkey(43), pubkey(44), pubkey(42)], &entropy_source, secp_ctx).unwrap(),
+               BlindedPath::new(&[pubkey(45), pubkey(46), pubkey(42)], &entropy_source, secp_ctx).unwrap(),
+       ];
+
+       let payinfo = vec![
+               BlindedPayInfo {
+                       fee_base_msat: 1,
+                       fee_proportional_millionths: 1_000,
+                       cltv_expiry_delta: 42,
+                       htlc_minimum_msat: 100,
+                       htlc_maximum_msat: 1_000_000_000_000,
+                       features: BlindedHopFeatures::empty(),
+               },
+               BlindedPayInfo {
+                       fee_base_msat: 1,
+                       fee_proportional_millionths: 1_000,
+                       cltv_expiry_delta: 42,
+                       htlc_minimum_msat: 100,
+                       htlc_maximum_msat: 1_000_000_000_000,
+                       features: BlindedHopFeatures::empty(),
+               },
+       ];
+
+       let payment_paths = paths.into_iter().zip(payinfo.into_iter()).collect();
+       let payment_hash = PaymentHash([42; 32]);
+       refund.respond_with(payment_paths, payment_hash, signing_pubkey)?.build()
+}
+
+pub fn refund_deser_test<Out: test_logger::Output>(data: &[u8], out: Out) {
+       do_test(data, out);
+}
+
+#[no_mangle]
+pub extern "C" fn refund_deser_run(data: *const u8, datalen: usize) {
+       do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
+}