fuzz/fuzz_alg_hll.cpp


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#include "ndpi_api.h"
#include "fuzz_common_code.h"

#include <stdint.h>
#include <stdio.h>
#include "fuzzer/FuzzedDataProvider.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  FuzzedDataProvider fuzzed_data(data, size);
  u_int16_t i, num_iteration;
  struct ndpi_hll *hll;
  int rc;

  /* Just to have some data */
  if(fuzzed_data.remaining_bytes() < 2048)
    return -1;

  /* To allow memory allocation failures */
  fuzz_set_alloc_callbacks_and_seed(size);

  hll = (struct ndpi_hll *)ndpi_malloc(sizeof(*hll));

  rc = ndpi_hll_init(hll, fuzzed_data.ConsumeIntegral<u_int8_t>());

  if (rc == 0) {
    num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
    for (i = 0; i < num_iteration; i++)
      ndpi_hll_add_number(hll, fuzzed_data.ConsumeIntegral<u_int32_t>());

    ndpi_hll_count(hll);

    ndpi_hll_reset(hll);

    num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
    for (i = 0; i < num_iteration; i++) {
      std::vector<int8_t>data = fuzzed_data.ConsumeBytes<int8_t>(fuzzed_data.ConsumeIntegral<u_int8_t>());
      ndpi_hll_add(hll, (char *)data.data(), data.size());
    }

    ndpi_hll_count(hll);

    ndpi_hll_destroy(hll);
  }

  ndpi_free(hll);

  return 0;
}