annotate fuzz-common.c @ 1367:00fb0a1f9b70 fuzz

define SIZE_T_MAX
author Matt Johnston <matt@ucc.asn.au>
date Mon, 22 May 2017 22:09:46 +0800
parents 6b89eb92f872
children ddfcadca3c4c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 #include "includes.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 #include "includes.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 #include "fuzz.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 #include "dbutil.h"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 #include "runopts.h"
1353
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
7 #include "crypto_desc.h"
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
8 #include "session.h"
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
9 #include "dbrandom.h"
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
10 #include "fuzz-wrapfd.h"
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 static void load_fixed_hostkeys(void);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 static void common_setup_fuzzer(void) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 fuzz.fuzzing = 1;
1357
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
18 fuzz.wrapfds = 1;
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
19 fuzz.input = m_malloc(sizeof(buffer));
1350
2722f2347a48 crypto_init()
Matt Johnston <matt@ucc.asn.au>
parents: 1348
diff changeset
20 crypto_init();
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
23 int fuzzer_set_input(const uint8_t *Data, size_t Size) {
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
24
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
25 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
26 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
27 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
28 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
29
1358
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
30 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
31 memset(&svr_ses, 0x0, sizeof(svr_ses));
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
32
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
33 // get prefix. input format is
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
34 // string prefix
1357
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
35 // uint32 wrapfd seed
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
36 // ... to be extended later
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
37 // [bytes] ssh input stream
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
38
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
39 // be careful to avoid triggering buffer.c assertions
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
40 if (fuzz.input->len < 8) {
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
41 return DROPBEAR_FAILURE;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
42 }
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
43 size_t prefix_size = buf_getint(fuzz.input);
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
44 if (prefix_size != 4) {
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
45 return DROPBEAR_FAILURE;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
46 }
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
47 uint32_t wrapseed = buf_getint(fuzz.input);
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
48 wrapfd_setup(wrapseed);
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
49
1358
6b89eb92f872 glaring wrapfd problems fixed
Matt Johnston <matt@ucc.asn.au>
parents: 1357
diff changeset
50 seedfuzz();
1356
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
51
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
52 return DROPBEAR_SUCCESS;
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
53 }
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
54
3677a510f545 add wrapfd. improve fuzzer in makefile
Matt Johnston <matt@ucc.asn.au>
parents: 1353
diff changeset
55
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 void svr_setup_fuzzer(void) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 struct passwd *pw;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 common_setup_fuzzer();
1353
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
60
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
61 _dropbear_exit = svr_dropbear_exit;
f3c8975de38e setup svr_dropbear_exit
Matt Johnston <matt@ucc.asn.au>
parents: 1350
diff changeset
62 _dropbear_log = svr_dropbear_log;
1348
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 char *argv[] = {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 "-E",
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 };
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 svr_getopts(argc, argv);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71 /* user lookups might be slow, cache it */
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72 pw = getpwuid(getuid());
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 dropbear_assert(pw);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 fuzz.pw_name = m_strdup(pw->pw_name);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75 fuzz.pw_dir = m_strdup(pw->pw_dir);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 fuzz.pw_shell = m_strdup(pw->pw_shell);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 fuzz.pw_passwd = m_strdup("!!zzznope");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 load_fixed_hostkeys();
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 static void load_fixed_hostkeys(void) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 #include "fuzz-hostkeys.c"
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 enum signkey_type type;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88 TRACE(("load fixed hostkeys"))
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90 svr_opts.hostkey = new_sign_key();
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 dropbear_exit("failed fixed rsa hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 buf_setlen(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110 buf_setpos(b, 0);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
114 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 buf_free(b);
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117 }
5c2899e35b63 fuzz harness
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
118
1357
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
119 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
120 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working
Matt Johnston <matt@ucc.asn.au>
parents: 1356
diff changeset
121 }