Add extrainfo fuzzer

1 files changed, 63 insertions, 0 deletions

diff --git a/src/test/fuzz/fuzz_extrainfo.c b/src/test/fuzz/fuzz_extrainfo.c
new file mode 100644
index 0000000000..6bfc425a9a
--- /dev/null
+++ b/src/test/fuzz/fuzz_extrainfo.c
@@ -0,0 +1,63 @@
+#define ROUTERPARSE_PRIVATE
+#include "or.h"
+#include "routerparse.h"
+#include "routerlist.h"
+#include "routerkeys.h"
+#include "fuzzing.h"
+
+static void
+mock_dump_desc__nodump(const char *desc, const char *type)
+{
+  (void)desc;
+  (void)type;
+}
+
+static int
+mock_router_produce_hash_final__nohash(char *digest,
+                                       const char *start, size_t len,
+                                       digest_algorithm_t alg)
+{
+  (void)start;
+  (void)len;
+  /* we could look at start[..] */
+  if (alg == DIGEST_SHA1)
+    memset(digest, 0x01, 20);
+  else
+    memset(digest, 0x02, 32);
+  return 0;
+}
+
+int
+fuzz_init(void)
+{
+  disable_signature_checking();
+  MOCK(dump_desc, mock_dump_desc__nodump);
+  MOCK(router_compute_hash_final, mock_router_produce_hash_final__nohash);
+  ed25519_init();
+  return 0;
+}
+
+int
+fuzz_cleanup(void)
+{
+  return 0;
+}
+
+int
+fuzz_main(const uint8_t *data, size_t sz)
+{
+  extrainfo_t *ei;
+  const char *str = (const char*) data;
+  int again = 0;
+  ei = extrainfo_parse_entry_from_string((const char *)str,
+                                         str+sz,
+                                         0, NULL, &again);
+  if (ei) {
+    log_debug(LD_GENERAL, "Parsing okay");
+    extrainfo_free(ei);
+  } else {
+    log_debug(LD_GENERAL, "Parsing failed");
+  }
+  return 0;
+}
+