1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/fuzzing/fuzz_marshal_princ.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 k5_unmarshal_princ.
34 */
35
36 #include "autoconf.h"
37 #include <cc-int.h>
38
39 #define FIRST_VERSION 1
40
41 #define kMinInputLength 2
42 #define kMaxInputLength 1024
43
44 extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
45
46 int
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)47 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
48 {
49 krb5_error_code ret;
50 krb5_principal princ;
51 int version;
52 struct k5buf buf;
53
54 if (size < kMinInputLength || size > kMaxInputLength)
55 return 0;
56
57 for (version = FIRST_VERSION; version <= 4; version++) {
58 ret = k5_unmarshal_princ(data, size, version, &princ);
59 if (!ret) {
60 k5_buf_init_dynamic(&buf);
61 k5_marshal_princ(&buf, version, princ);
62 k5_buf_free(&buf);
63 }
64
65 krb5_free_principal(NULL, princ);
66 }
67
68 return 0;
69 }
70