1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/fuzzing/fuzz_chpw.c */
3 /*
4 * Copyright (C) 2024 by Arjun. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Fuzzing harness implementation for krb5_chpw_message.
34 */
35
36 #include "autoconf.h"
37 #include <k5-int.h>
38
39 #define kMinInputLength 2
40 #define kMaxInputLength 512
41
42 extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
43
44 int
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)45 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
46 {
47 char *msg;
48 krb5_data data_in;
49 krb5_context context;
50
51 if (size < kMinInputLength || size > kMaxInputLength)
52 return 0;
53
54 data_in = make_data((void *)data, size);
55
56 if (krb5_init_context(&context) != 0)
57 return 0;
58
59 if (krb5_chpw_message(context, &data_in, &msg) == 0)
60 free(msg);
61
62 krb5_free_context(context);
63
64 return 0;
65 }
66