pidgin/pidgin

Add fuzzing support for some libpurple features
release-2.x.y
2021-06-24, Jordy Zomer <>
97c51d97d375
Add fuzzing support for some libpurple features

Testing Done:
Hi!

I built and tested all of these fuzzers for libpurple.

You can build them by first building pidgin/libpurple with `--enable-fuzzing` then going into `libpurple/tests` and run `make check`. After that you can run these fuzzers. With a dictionary if you want :)

for example:
```bash
$ ./fuzz_markup_strip_html -dict=dictionaries/html.dict
Dictionary: 465 entries
INFO: Seed: 2274862685
INFO: Loaded 1 modules (3 inline 8-bit counters): 3 [0x5a4ec0, 0x5a4ec3),
INFO: Loaded 1 PC tables (3 PCs): 3 [0x568ee8,0x568f18),
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: A corpus is not provided, starting from an empty corpus
#2 INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 30Mb
#1048576 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 789Mb
#2097152 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 792Mb
```

Best Regards,

Jordy Zomer

Reviewed at https://reviews.imfreedom.org/r/760/
#include <glib.h>
#include <stdlib.h>
#include "tests.h"
#include "../core.h"
#include "../eventloop.h"
#include "../util.h"
/******************************************************************************
* libpurple goodies
*****************************************************************************/
static guint
purple_check_input_add(gint fd, PurpleInputCondition condition,
PurpleInputFunction function, gpointer data)
{
/* this is a no-op for now, feel free to implement it */
return 0;
}
static PurpleEventLoopUiOps eventloop_ui_ops = {
g_timeout_add,
g_source_remove,
purple_check_input_add,
g_source_remove,
NULL, /* input_get_error */
#if GLIB_CHECK_VERSION(2,14,0)
g_timeout_add_seconds,
#else
NULL,
#endif
NULL,
NULL,
NULL
};
static void
purple_check_init(void) {
#if !GLIB_CHECK_VERSION(2, 36, 0)
/* GLib type system is automaticaly initialized since 2.36. */
g_type_init();
#endif
purple_eventloop_set_ui_ops(&eventloop_ui_ops);
#if 0
/* build our fake home directory */
{
gchar *home_dir;
home_dir = g_build_path(G_DIR_SEPARATOR_S, BUILDDIR, "libpurple", "tests", "home", NULL);
purple_util_set_user_dir(home_dir);
g_free(home_dir);
}
#else
purple_util_set_user_dir("/dev/null");
#endif
purple_core_init("check");
}
/******************************************************************************
* Check meat and potatoes
*****************************************************************************/
Suite*
master_suite(void)
{
Suite *s = suite_create("Master Suite");
return s;
}
int main(void)
{
int number_failed;
SRunner *sr;
if (g_getenv("PURPLE_CHECK_DEBUG"))
purple_debug_set_enabled(TRUE);
/* Make g_return_... functions fatal, ALWAYS.
* As this is the test code, this is NOT controlled
* by PURPLE_FATAL_ASSERTS. */
g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
sr = srunner_create (master_suite());
srunner_add_suite(sr, cipher_suite());
srunner_add_suite(sr, jabber_caps_suite());
srunner_add_suite(sr, jabber_digest_md5_suite());
srunner_add_suite(sr, jabber_jutil_suite());
srunner_add_suite(sr, jabber_scram_suite());
srunner_add_suite(sr, util_suite());
srunner_add_suite(sr, xmlnode_suite());
/* make this a libpurple "ui" */
purple_check_init();
srunner_run_all (sr, CK_NORMAL);
number_failed = srunner_ntests_failed (sr);
srunner_free (sr);
purple_core_quit();
return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}