1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/fuzzing/fuzz_krad.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 krad_packet_decode_response,
34 * krad_packet_decode_request.
35 */
36
37 #include "autoconf.h"
38 #include <k5-int.h>
39 #include <krad.h>
40
41 #define kMinInputLength 2
42 #define kMaxInputLength 1024
43
44 static krad_packet *packets[3];
45
46 static const krad_packet *
iterator(void * data,krb5_boolean cancel)47 iterator(void *data, krb5_boolean cancel)
48 {
49 krad_packet *tmp;
50 int *i = data;
51
52 if (cancel || packets[*i] == NULL)
53 return NULL;
54
55 tmp = packets[*i];
56 *i += 1;
57 return tmp;
58 }
59
60 extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
61
62 int
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)63 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
64 {
65 int i;
66 krb5_context ctx;
67 krb5_data data_in;
68 const char *secret = "f";
69 const krad_packet *req_1 = NULL, *req_2 = NULL;
70 krad_packet *rsp_1 = NULL, *rsp_2 = NULL;
71
72 if (size < kMinInputLength || size > kMaxInputLength)
73 return 0;
74
75 if (krb5_init_context(&ctx) != 0)
76 return 0;
77
78 data_in = make_data((void *)data, size);
79
80 i = 0;
81 krad_packet_decode_response(ctx, secret, &data_in, iterator, &i,
82 &req_1, &rsp_1);
83
84 i = 0;
85 krad_packet_decode_request(ctx, secret, &data_in, iterator, &i,
86 &req_2, &rsp_2);
87
88 krad_packet_free(rsp_1);
89 krad_packet_free(rsp_2);
90 krb5_free_context(ctx);
91
92 return 0;
93 }
94