fuzz: add fuzzers to test bitmap64 and domain_classify data structures (#2082)

1 files changed, 53 insertions, 0 deletions

diff --git a/fuzz/fuzz_ds_domain_classify.cpp b/fuzz/fuzz_ds_domain_classify.cpp
new file mode 100644
index 000000000..afd43a796
--- /dev/null
+++ b/fuzz/fuzz_ds_domain_classify.cpp
@@ -0,0 +1,53 @@
+#include "ndpi_api.h"
+#include "fuzz_common_code.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <assert.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, is_added = 0;
+  bool rc;
+  ndpi_domain_classify *d;
+  u_int8_t class_id;
+  std::string value, value_added;
+
+  /* To allow memory allocation failures */
+  fuzz_set_alloc_callbacks_and_seed(size);
+
+  d = ndpi_domain_classify_alloc();
+
+  num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
+  for (i = 0; i < num_iteration; i++) {
+
+    value = fuzzed_data.ConsumeBytesAsString(fuzzed_data.ConsumeIntegral<u_int8_t>());
+    class_id = fuzzed_data.ConsumeIntegral<u_int8_t>();
+
+    rc = ndpi_domain_classify_add(d, class_id, value.c_str());
+    /* Keep one random entry really added */
+    if (rc == true && is_added == 0 && fuzzed_data.ConsumeBool()) {
+      value_added = value;
+      is_added = 1;
+    }
+  }
+
+  /* "Random" search */
+  num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
+  for (i = 0; i < num_iteration; i++) {
+    value = fuzzed_data.ConsumeBytesAsString(fuzzed_data.ConsumeIntegral<u_int8_t>());
+
+    ndpi_domain_classify_contains(d, &class_id, value.c_str());
+  }
+  /* Search of an added entry */
+  if (is_added) {
+    ndpi_domain_classify_contains(d, &class_id, value_added.c_str());
+  }
+
+  ndpi_domain_classify_size(d);
+
+  ndpi_domain_classify_free(d);
+
+  return 0;
+}