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reduce the scope of the fuzzer #846

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merged 2 commits into from
Jan 22, 2025
Merged

reduce the scope of the fuzzer #846

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fc8acca
reduce the scope of the fuzzer
lemire Jan 22, 2025
51a73ea
lint
lemire Jan 22, 2025
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28 changes: 25 additions & 3 deletions fuzz/url_pattern.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -6,10 +6,32 @@
#include "ada.cpp"
#include "ada.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
std::string bytesToAlphanumeric(const std::string& source) {
static const char alphanumeric[] =
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789";

std::string result;
result.reserve(source.size());

for (char byte : source) {
int index = static_cast<unsigned char>(byte) % (sizeof(alphanumeric) - 1);
result.push_back(alphanumeric[index]);
}

return result;
}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp(data, size);
std::string source = fdp.ConsumeRandomLengthString(50);
std::string base_source = fdp.ConsumeRandomLengthString(50);
// We do not want to trigger arbitrary regex matching.
std::string source =
"/" + bytesToAlphanumeric(fdp.ConsumeRandomLengthString(50)) + "/" +
bytesToAlphanumeric(fdp.ConsumeRandomLengthString(50));
std::string base_source =
"/" + bytesToAlphanumeric(fdp.ConsumeRandomLengthString(50)) + "/" +
bytesToAlphanumeric(fdp.ConsumeRandomLengthString(50));

// Without base or options
auto result = ada::parse_url_pattern(source, nullptr, nullptr);
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