xref: /freebsd/crypto/krb5/src/tests/fuzzing/fuzz_gss.c (revision f1c4c3daccbaf3820f0e2224de53df12fc952fcc)
1*f1c4c3daSCy Schubert /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2*f1c4c3daSCy Schubert /* tests/fuzzing/fuzz_gss.c */
3*f1c4c3daSCy Schubert /*
4*f1c4c3daSCy Schubert  * Copyright (C) 2024 by Arjun. All rights reserved.
5*f1c4c3daSCy Schubert  *
6*f1c4c3daSCy Schubert  * Redistribution and use in source and binary forms, with or without
7*f1c4c3daSCy Schubert  * modification, are permitted provided that the following conditions
8*f1c4c3daSCy Schubert  * are met:
9*f1c4c3daSCy Schubert  *
10*f1c4c3daSCy Schubert  * * Redistributions of source code must retain the above copyright
11*f1c4c3daSCy Schubert  *   notice, this list of conditions and the following disclaimer.
12*f1c4c3daSCy Schubert  *
13*f1c4c3daSCy Schubert  * * Redistributions in binary form must reproduce the above copyright
14*f1c4c3daSCy Schubert  *   notice, this list of conditions and the following disclaimer in
15*f1c4c3daSCy Schubert  *   the documentation and/or other materials provided with the
16*f1c4c3daSCy Schubert  *   distribution.
17*f1c4c3daSCy Schubert  *
18*f1c4c3daSCy Schubert  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19*f1c4c3daSCy Schubert  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20*f1c4c3daSCy Schubert  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21*f1c4c3daSCy Schubert  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22*f1c4c3daSCy Schubert  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23*f1c4c3daSCy Schubert  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24*f1c4c3daSCy Schubert  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25*f1c4c3daSCy Schubert  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26*f1c4c3daSCy Schubert  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27*f1c4c3daSCy Schubert  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*f1c4c3daSCy Schubert  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29*f1c4c3daSCy Schubert  * OF THE POSSIBILITY OF SUCH DAMAGE.
30*f1c4c3daSCy Schubert  */
31*f1c4c3daSCy Schubert 
32*f1c4c3daSCy Schubert /*
33*f1c4c3daSCy Schubert  * Fuzzing harness implementation for gss_accept_sec_context.
34*f1c4c3daSCy Schubert  */
35*f1c4c3daSCy Schubert 
36*f1c4c3daSCy Schubert #include "autoconf.h"
37*f1c4c3daSCy Schubert #include <krb5.h>
38*f1c4c3daSCy Schubert #include <gssapi.h>
39*f1c4c3daSCy Schubert #include <string.h>
40*f1c4c3daSCy Schubert 
41*f1c4c3daSCy Schubert #define kMinInputLength 2
42*f1c4c3daSCy Schubert #define kMaxInputLength 1024
43*f1c4c3daSCy Schubert 
44*f1c4c3daSCy Schubert extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
45*f1c4c3daSCy Schubert 
46*f1c4c3daSCy Schubert int
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)47*f1c4c3daSCy Schubert LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
48*f1c4c3daSCy Schubert {
49*f1c4c3daSCy Schubert     gss_OID doid;
50*f1c4c3daSCy Schubert     OM_uint32 minor, ret_flags, time_rec;
51*f1c4c3daSCy Schubert     gss_name_t client = GSS_C_NO_NAME;
52*f1c4c3daSCy Schubert     gss_ctx_id_t context = GSS_C_NO_CONTEXT;
53*f1c4c3daSCy Schubert     gss_cred_id_t deleg_cred = GSS_C_NO_CREDENTIAL;
54*f1c4c3daSCy Schubert     gss_buffer_desc data_in, data_out = GSS_C_EMPTY_BUFFER;
55*f1c4c3daSCy Schubert 
56*f1c4c3daSCy Schubert     if (size < kMinInputLength || size > kMaxInputLength)
57*f1c4c3daSCy Schubert         return 0;
58*f1c4c3daSCy Schubert 
59*f1c4c3daSCy Schubert     data_in.length = size;
60*f1c4c3daSCy Schubert     data_in.value = (void *)data;
61*f1c4c3daSCy Schubert 
62*f1c4c3daSCy Schubert     gss_accept_sec_context(&minor, &context, GSS_C_NO_CREDENTIAL,
63*f1c4c3daSCy Schubert                            &data_in, GSS_C_NO_CHANNEL_BINDINGS, &client,
64*f1c4c3daSCy Schubert                            &doid, &data_out, &ret_flags, &time_rec,
65*f1c4c3daSCy Schubert                            &deleg_cred);
66*f1c4c3daSCy Schubert 
67*f1c4c3daSCy Schubert     gss_release_buffer(&minor, &data_out);
68*f1c4c3daSCy Schubert 
69*f1c4c3daSCy Schubert     if (context != GSS_C_NO_CONTEXT)
70*f1c4c3daSCy Schubert         gss_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
71*f1c4c3daSCy Schubert 
72*f1c4c3daSCy Schubert     return 0;
73*f1c4c3daSCy Schubert }
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