1 files changed, 72 insertions, 0 deletions
diff --git a/projects/dnsmasq/fuzz_auth.c b/projects/dnsmasq/fuzz_auth.c
new file mode 100644
index 00000000..4a233e13
--- /dev/null
+++ b/projects/dnsmasq/fuzz_auth.c
@@ -0,0 +1,72 @@
+/* Copyright 2021 Google LLC
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+      http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "fuzz_header.h"
+
+/* 
+ * Targets answer_auth
+ */
+void FuzzAuth(const uint8_t **data2, size_t *size2) {
+  const uint8_t *data = *data2;
+  size_t size = *size2;
+  
+  int i1 = get_int(&data, &size);
+  int i2 = get_int(&data, &size);
+  int i3 = get_int(&data, &size);
+
+  if (size > (sizeof(struct dns_header) +50)) {
+    char *new_data = malloc(size+1);
+    memset(new_data, 0, size);
+    memcpy(new_data, data, size);
+    new_data[size] = '\0';
+    pointer_arr[pointer_idx++] = (void*)new_data;
+
+    time_t now;
+		union mysockaddr peer_addr;
+		answer_auth((struct dns_header *)new_data, new_data + size, size, now, &peer_addr, i1, i2, i3);
+  }
+}
+
+/*
+ * Fuzzer entrypoint.
+ */ 
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  daemon = NULL;
+  if (size < 1) {
+    return 0;
+  }
+
+  // Initialize mini garbage collector
+  gb_init();
+
+  // Get a value we can use to decide which target to hit.
+  int i = (int)data[0];
+  data += 1;
+  size -= 1;
+
+  int succ = init_daemon(&data, &size);
+
+  if (succ == 0) {
+    cache_init();
+    blockdata_init();
+
+		FuzzAuth(&data, &size);
+
+    cache_start_insert();
+    fuzz_blockdata_cleanup();
+  }
+
+  // Free data in mini garbage collector.
+  gb_cleanup();
+
+  return 0;
+}