1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/fuzzing/fuzz_gss.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 gss_accept_sec_context.
34 */
35
36 #include "autoconf.h"
37 #include <krb5.h>
38 #include <gssapi.h>
39 #include <string.h>
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 gss_OID doid;
50 OM_uint32 minor, ret_flags, time_rec;
51 gss_name_t client = GSS_C_NO_NAME;
52 gss_ctx_id_t context = GSS_C_NO_CONTEXT;
53 gss_cred_id_t deleg_cred = GSS_C_NO_CREDENTIAL;
54 gss_buffer_desc data_in, data_out = GSS_C_EMPTY_BUFFER;
55
56 if (size < kMinInputLength || size > kMaxInputLength)
57 return 0;
58
59 data_in.length = size;
60 data_in.value = (void *)data;
61
62 gss_accept_sec_context(&minor, &context, GSS_C_NO_CREDENTIAL,
63 &data_in, GSS_C_NO_CHANNEL_BINDINGS, &client,
64 &doid, &data_out, &ret_flags, &time_rec,
65 &deleg_cred);
66
67 gss_release_buffer(&minor, &data_out);
68
69 if (context != GSS_C_NO_CONTEXT)
70 gss_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
71
72 return 0;
73 }
74