Add extrainfo fuzzer

src/test/fuzz/dict/extrainfo

@@ -0,0 +1,32 @@
+"cell-circuits-per-decile"
+"cell-processed-cells"
+"cell-queued-cells"
+"cell-stats-end"
+"cell-time-in-queue"
+"dirreq-stats-end"
+"dirreq-v2-direct-dl"
+"dirreq-v2-ips"
+"dirreq-v2-reqs"
+"dirreq-v2-resp"
+"dirreq-v2-share"
+"dirreq-v2-tunneled-dl"
+"dirreq-v3-direct-dl"
+"dirreq-v3-ips"
+"dirreq-v3-reqs"
+"dirreq-v3-resp"
+"dirreq-v3-share"
+"dirreq-v3-tunneled-dl"
+"entry-ips"
+"entry-stats-end"
+"exit-kibibytes-read"
+"exit-kibibytes-written"
+"exit-stats-end"
+"exit-streams-opened"
+"extra-info"
+"identity-ed25519"
+"opt"
+"published"
+"read-history"
+"router-sig-ed25519"
+"router-signature"
+"write-history"

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;
+}
+

src/test/fuzz/include.am

@@ -39,8 +39,17 @@ src_test_fuzz_fuzz_http_CFLAGS = $(FUZZING_CFLAGS)
 src_test_fuzz_fuzz_http_LDFLAGS = $(FUZZING_LDFLAG)
 src_test_fuzz_fuzz_http_LDADD = $(FUZZING_LIBS)
 
+src_test_fuzz_fuzz_extrainfo_SOURCES = \
+	src/test/fuzz/fuzzing_common.c \
+	src/test/fuzz/fuzz_extrainfo.c
+src_test_fuzz_fuzz_extrainfo_CPPFLAGS = $(FUZZING_CPPFLAGS)
+src_test_fuzz_fuzz_extrainfo_CFLAGS = $(FUZZING_CFLAGS)
+src_test_fuzz_fuzz_extrainfo_LDFLAGS = $(FUZZING_LDFLAG)
+src_test_fuzz_fuzz_extrainfo_LDADD = $(FUZZING_LIBS)
+
 FUZZERS = \
 	src/test/fuzz/fuzz-descriptor \
+	src/test/fuzz/fuzz-extrainfo \
 	src/test/fuzz/fuzz-http
 
 # The fuzzers aren't built by default right now. That should change.