fuzzing: Add more fuzzing tests for various string parsing functions

There’s no explicit guarantee that any of these functions are safe to
use on untrusted data, but it does no harm to test them.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

fuzzing/fuzz_date_parse.c

@@ -0,0 +1,19 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GDate *date = g_date_new ();
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (g_date_set_parse() doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  g_date_set_parse (date, (const gchar *) nul_terminated_data);
+  g_free (nul_terminated_data);
+
+  g_date_free (date);
+
+  return 0;
+}

fuzzing/fuzz_date_time_new_from_iso8601.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GDateTime *dt = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (the function doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  dt = g_date_time_new_from_iso8601 ((const gchar *) nul_terminated_data, NULL);
+  g_free (nul_terminated_data);
+
+  if (dt != NULL)
+    {
+      gchar *text = g_date_time_format_iso8601 (dt);
+      g_free (text);
+    }
+
+  g_clear_pointer (&dt, g_date_time_unref);
+
+  return 0;
+}

fuzzing/fuzz_inet_address_mask_new_from_string.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GInetAddressMask *mask = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (the function doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  mask = g_inet_address_mask_new_from_string ((const gchar *) nul_terminated_data, NULL);
+  g_free (nul_terminated_data);
+
+  if (mask != NULL)
+    {
+      gchar *text = g_inet_address_mask_to_string (mask);
+      g_free (text);
+    }
+
+  g_clear_object (&mask);
+
+  return 0;
+}

fuzzing/fuzz_inet_address_new_from_string.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GInetAddress *addr = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (the function doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  addr = g_inet_address_new_from_string ((const gchar *) nul_terminated_data);
+  g_free (nul_terminated_data);
+
+  if (addr != NULL)
+    {
+      gchar *text = g_inet_address_to_string (addr);
+      g_free (text);
+    }
+
+  g_clear_object (&addr);
+
+  return 0;
+}

fuzzing/fuzz_inet_socket_address_new_from_string.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GSocketAddress *addr = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (the function doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  addr = g_inet_socket_address_new_from_string ((const gchar *) nul_terminated_data, 1);
+  g_free (nul_terminated_data);
+
+  if (addr != NULL)
+    {
+      gchar *text = g_socket_connectable_to_string (G_SOCKET_CONNECTABLE (addr));
+      g_free (text);
+    }
+
+  g_clear_object (&addr);
+
+  return 0;
+}

fuzzing/fuzz_network_address_parse.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GSocketConnectable *connectable = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (g_network_address_parse() doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  connectable = g_network_address_parse ((const gchar *) nul_terminated_data, 1, NULL);
+  g_free (nul_terminated_data);
+
+  if (connectable != NULL)
+    {
+      gchar *text = g_socket_connectable_to_string (connectable);
+      g_free (text);
+    }
+
+  g_clear_object (&connectable);
+
+  return 0;
+}

fuzzing/fuzz_network_address_parse_uri.c

@@ -0,0 +1,25 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  unsigned char *nul_terminated_data = NULL;
+  GSocketConnectable *connectable = NULL;
+
+  fuzz_set_logging_func ();
+
+  /* ignore @size (g_network_address_parse_uri() doesn’t support it); ensure @data is nul-terminated */
+  nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
+  connectable = g_network_address_parse_uri ((const gchar *) nul_terminated_data, 1, NULL);
+  g_free (nul_terminated_data);
+
+  if (connectable != NULL)
+    {
+      gchar *text = g_socket_connectable_to_string (connectable);
+      g_free (text);
+    }
+
+  g_clear_object (&connectable);
+
+  return 0;
+}

fuzzing/meson.build

@@ -1,7 +1,14 @@
 fuzz_targets = [
   'fuzz_bookmark',
+  'fuzz_date_parse',
+  'fuzz_date_time_new_from_iso8601',
   'fuzz_dbus_message',
+  'fuzz_inet_address_mask_new_from_string',
+  'fuzz_inet_address_new_from_string',
+  'fuzz_inet_socket_address_new_from_string',
   'fuzz_key',
+  'fuzz_network_address_parse',
+  'fuzz_network_address_parse_uri',
   'fuzz_uri_escape',
   'fuzz_uri_parse',
   'fuzz_uri_parse_params',