rust-bitcoin-unsafe-fast/fuzz/fuzz_targets/bitcoin/deserialize_witness.rs

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use bitcoin::blockdata::witness::Witness;
use bitcoin::consensus::{deserialize, serialize};
use honggfuzz::fuzz;
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fn do_test(data: &[u8]) {
let w: Result<Witness, _> = deserialize(data);
if let Ok(witness) = w {
let serialized = serialize(&witness);
assert_eq!(data, &serialized[..]);
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}
}
fn main() {
loop {
fuzz!(|data| {
do_test(data);
});
}
}
#[cfg(all(test, fuzzing))]
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mod tests {
fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
let mut b = 0;
for (idx, c) in hex.as_bytes().iter().enumerate() {
b <<= 4;
match *c {
b'A'..=b'F' => b |= c - b'A' + 10,
b'a'..=b'f' => b |= c - b'a' + 10,
b'0'..=b'9' => b |= c - b'0',
_ => panic!("Bad hex"),
}
if (idx & 1) == 1 {
out.push(b);
b = 0;
}
}
}
#[test]
fn duplicate_crash() {
let mut a = Vec::new();
extend_vec_from_hex("00", &mut a);
super::do_test(&a);
}
}