1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/fuzzing/fuzz_attrset.c - fuzzing harness for kr_attrset functions */
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 #include "autoconf.h"
33 #include <k5-int.h>
34 #include <internal.h>
35
36 #define kMinInputLength 2
37 #define kMaxInputLength 1024
38
39 extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
40
41 int
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)42 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
43 {
44 krb5_error_code ret;
45 krb5_context context;
46 krad_attrset *set;
47 krb5_data data_in;
48 uint8_t buffer[KRAD_PACKET_SIZE_MAX], auth[MD5_DIGEST_SIZE] = { 0 };
49 size_t encode_len;
50
51 if (size < kMinInputLength || size > kMaxInputLength)
52 return 0;
53
54 data_in = make_data((void *)data, size);
55
56 ret = krb5_init_context(&context);
57 if (ret)
58 return 0;
59
60 ret = kr_attrset_decode(context, &data_in, "f", auth, &set);
61 if (!ret)
62 kr_attrset_encode(set, "f", auth, FALSE, buffer, &encode_len);
63
64 krad_attrset_free(set);
65 krb5_free_context(context);
66
67 return 0;
68 }
69