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Merge pull request #117 from TheBlueMatt/2018-08-no-claim-fuzz-bug

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Don't HTLC claim with no-possible-preimage in full_stack_target
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Matt Corallo 2018-08-17 13:25:57 -04:00 • committed by GitHub
commit 93b470dbb4
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1 changed files with 11 additions and 8 deletions
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19
fuzz/fuzz_targets/full_stack_target.rs
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@ -275,14 +275,17 @@ pub fn do_test(data: &[u8]) {
},
8 => {
for payment in payments_received.drain(..) {
let mut payment_preimage = [0; 32];
payment_preimage[0] = payment[0];
let mut sha = Sha256::new();
sha.input(&payment_preimage);
let mut payment_hash_check = [0; 32];
sha.result(&mut payment_hash_check);
assert!(payment_hash_check == payment);
channelmanager.claim_funds(payment_preimage);
// SHA256 is defined as XOR of all input bytes placed in the first byte, and 0s
// for the remaining bytes. Thus, if not all remaining bytes are 0s we cannot
// fulfill this HTLC, but if they are, we can just take the first byte and
// place that anywhere in our preimage.
if &payment[1..] != &[0; 31] {
channelmanager.fail_htlc_backwards(&payment);
} else {
let mut payment_preimage = [0; 32];
payment_preimage[0] = payment[0];
channelmanager.claim_funds(payment_preimage);
}
}
},
9 => {