add fuzz test for base32 util

Author: jbesraa

fuzz/src/base32.rs

@@ -0,0 +1,33 @@
+// 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 lightning::util::base32;
+
+use crate::utils::test_logger;
+
+#[inline]
+pub fn do_test(data: &[u8]) {
+	let res = base32::encode(base32::Alphabet::Crockford, data);
+	assert_eq!(&base32::decode(base32::Alphabet::Crockford, &res).unwrap()[..], data);
+
+	if let Ok(s) = std::str::from_utf8(data) {
+		if let Some(decoded) = base32::decode(base32::Alphabet::Crockford,s) {
+			assert_eq!(&base32::encode(base32::Alphabet::Crockford,&decoded), &s.to_ascii_lowercase());
+		}
+	}
+}
+
+pub fn base32_test<Out: test_logger::Output>(data: &[u8], _out: Out) {
+	do_test(data);
+}
+
+#[no_mangle]
+pub extern "C" fn base32_run(data: *const u8, datalen: usize) {
+	do_test(unsafe { std::slice::from_raw_parts(data, datalen) });
+}

fuzz/src/bin/gen_target.sh

@@ -20,6 +20,7 @@ GEN_TEST refund_deser
 GEN_TEST router
 GEN_TEST zbase32
 GEN_TEST indexedmap
+GEN_TEST base32
 
 GEN_TEST msg_accept_channel msg_targets::
 GEN_TEST msg_announcement_signatures msg_targets::

fuzz/src/lib.rs

@@ -28,5 +28,6 @@ pub mod process_network_graph;
 pub mod refund_deser;
 pub mod router;
 pub mod zbase32;
+pub mod base32;
 
 pub mod msg_targets;

fuzz/targets.h

@@ -13,6 +13,7 @@ void refund_deser_run(const unsigned char* data, size_t data_len);
 void router_run(const unsigned char* data, size_t data_len);
 void zbase32_run(const unsigned char* data, size_t data_len);
 void indexedmap_run(const unsigned char* data, size_t data_len);
+void base32_run(const unsigned char* data, size_t data_len);
 void msg_accept_channel_run(const unsigned char* data, size_t data_len);
 void msg_announcement_signatures_run(const unsigned char* data, size_t data_len);
 void msg_channel_reestablish_run(const unsigned char* data, size_t data_len);