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fuzz: Improve ConsumeTxDestination

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* Assert when a type is missing
* Add missing WitnessV1Taproot
* Limit WitnessUnknown to version [2, 16], to avoid abiguity
* Limit WitnessUnknown to size [2, 40], to avoid invalid sizes
This commit is contained in:
MarcoFalke
2021-07-04 16:38:51 +02:00
parent fa40c0964b
commit fab99865c0
2 changed files with 14 additions and 5 deletions
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16
src/test/fuzz/util.cpp
View File

@@ -2,6 +2,7 @@
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <pubkey.h>
#include <test/fuzz/util.h>
#include <test/util/script.h>
#include <util/rbf.h>
@@ -308,7 +309,7 @@ uint32_t ConsumeSequence(FuzzedDataProvider& fuzzed_data_provider) noexcept
CTxDestination ConsumeTxDestination(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
CTxDestination tx_destination;
CallOneOf(
const size_t call_size{CallOneOf(
fuzzed_data_provider,
[&] {
tx_destination = CNoDestination{};
@@ -325,13 +326,20 @@ CTxDestination ConsumeTxDestination(FuzzedDataProvider& fuzzed_data_provider) no
[&] {
tx_destination = WitnessV0KeyHash{ConsumeUInt160(fuzzed_data_provider)};
},
[&] {
tx_destination = WitnessV1Taproot{XOnlyPubKey{ConsumeUInt256(fuzzed_data_provider)}};
},
[&] {
WitnessUnknown witness_unknown{};
witness_unknown.version = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
const std::vector<uint8_t> witness_unknown_program_1 = fuzzed_data_provider.ConsumeBytes<uint8_t>(40);
witness_unknown.version = fuzzed_data_provider.ConsumeIntegralInRange(2, 16);
std::vector<uint8_t> witness_unknown_program_1{fuzzed_data_provider.ConsumeBytes<uint8_t>(40)};
if (witness_unknown_program_1.size() < 2) {
witness_unknown_program_1 = {0, 0};
}
witness_unknown.length = witness_unknown_program_1.size();
std::copy(witness_unknown_program_1.begin(), witness_unknown_program_1.end(), witness_unknown.program);
tx_destination = witness_unknown;
});
})};
Assert(call_size == std::variant_size_v<CTxDestination>);
return tx_destination;
}

3
src/test/fuzz/util.h
View File

@@ -37,7 +37,7 @@
#include <vector>
template <typename... Callables>
void CallOneOf(FuzzedDataProvider& fuzzed_data_provider, Callables... callables)
size_t CallOneOf(FuzzedDataProvider& fuzzed_data_provider, Callables... callables)
{
constexpr size_t call_size{sizeof...(callables)};
static_assert(call_size >= 1);
@@ -45,6 +45,7 @@ void CallOneOf(FuzzedDataProvider& fuzzed_data_provider, Callables... callables)
size_t i{0};
((i++ == call_index ? callables() : void()), ...);
return call_size;
}
template <typename Collection>