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/
/**
* @file ntlm.h
*/
/* purple
*
* Copyright (C) 2005, Thomas Butter <butter@uni-mannheim.de>
*
* ntlm structs are taken from NTLM description on
* http://www.innovation.ch/java/ntlm.html
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef _PURPLE_NTLM_H
#define _PURPLE_NTLM_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generates the base64 encoded type 1 message needed for NTLM authentication
*
* @param hostname Your hostname
* @param domain The domain to authenticate to
* @return base64 encoded string to send to the server. This should
* be g_free'd by the caller.
*/
gchar *purple_ntlm_gen_type1(const gchar *hostname, const gchar *domain);
/**
* Parses the ntlm type 2 message
*
* @param type2 String containing the base64 encoded type2 message
* @param flags If not @c NULL, this will store the flags for the message
*
* @return The nonce for use in message type3. This is a statically
* allocated 8 byte binary string.
*/
guint8 *purple_ntlm_parse_type2(const gchar *type2, guint32 *flags);
/**
* Generates a type3 message
*
* @param username The username
* @param passw The password
* @param hostname The hostname
* @param domain The domain to authenticate against
* @param nonce The nonce returned by purple_ntlm_parse_type2
* @param flags Pointer to the flags returned by purple_ntlm_parse_type2
* @return A base64 encoded type3 message. This should be g_free'd by
* the caller.
*/
gchar *purple_ntlm_gen_type3(const gchar *username, const gchar *passw, const gchar *hostname, const gchar *domain, const guint8 *nonce, guint32 *flags);
#ifdef __cplusplus
}
#endif
#endif /* _PURPLE_NTLM_H */