Mercurial > dropbear

annotate fuzz/fuzzer-kexcurve25519.c @ 1879:81991ded740f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
test: Set allow_reuse_addr This avoids intermittent "Address already in use" failure
author Matt Johnston <matt@ucc.asn.au>
date Tue, 15 Mar 2022 15:38:46 +0800
parents 0cc85b4a4abb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
1 #include "fuzz.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
2 #include "session.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
3 #include "fuzz-wrapfd.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
4 #include "debug.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
5 #include "runopts.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
6 #include "algo.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
7 #include "bignum.h"
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
8
1772
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
9 static struct key_context* keep_newkeys = NULL;
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
10 /* An arbitrary limit */
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
11 #define NUM_PARAMS 80
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
12 static struct kex_curve25519_param *curve25519_params[NUM_PARAMS];
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
13
1772
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
14 static void setup() __attribute__((constructor));
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
15 // Perform initial setup here to avoid hitting timeouts on first run
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
16 static void setup() {
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
17 fuzz_common_setup();
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
18 fuzz_svr_setup();
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
19
1772
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
20 keep_newkeys = (struct key_context*)m_malloc(sizeof(struct key_context));
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
21 keep_newkeys->algo_kex = fuzz_get_algo(sshkex, "curve25519-sha256");
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
22 keep_newkeys->algo_hostkey = DROPBEAR_SIGNKEY_ED25519;
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
23 ses.newkeys = keep_newkeys;
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
24
1772
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
25 /* Pre-generate parameters */
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
26 int i;
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
27 for (i = 0; i < NUM_PARAMS; i++) {
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
28 curve25519_params[i] = gen_kexcurve25519_param();
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
29 }
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
30 }
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
31
1772
0cc85b4a4abb Move fuzzer-kex initialisation into a constructor function
Matt Johnston <matt@ucc.asn.au>
parents: 1756
diff changeset
32 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
1659
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
33 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
34 return 0;
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
35 }
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
36
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
37 m_malloc_set_epoch(1);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
38
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
39 if (setjmp(fuzz.jmp) == 0) {
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
40 /* Based on recv_msg_kexdh_init()/send_msg_kexdh_reply()
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
41 with DROPBEAR_KEX_CURVE25519 */
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
42 ses.newkeys = keep_newkeys;
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
43
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
44 /* Choose from the collection of curve25519 params */
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
45 unsigned int e = buf_getint(fuzz.input);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
46 struct kex_curve25519_param *curve25519_param = curve25519_params[e % NUM_PARAMS];
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
47
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
48 buffer * ecdh_qs = buf_getstringbuf(fuzz.input);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
49
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
50 ses.kexhashbuf = buf_new(KEXHASHBUF_MAX_INTS);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
51 kexcurve25519_comb_key(curve25519_param, ecdh_qs, svr_opts.hostkey);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
52
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
53 mp_clear(ses.dh_K);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
54 m_free(ses.dh_K);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
55 buf_free(ecdh_qs);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
56
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
57 buf_free(ses.hash);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
58 buf_free(ses.session_id);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
59 /* kexhashbuf is freed in kexdh_comb_key */
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
60
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
61 m_malloc_free_epoch(1, 0);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
62 } else {
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
63 m_malloc_free_epoch(1, 1);
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
64 TRACE(("dropbear_exit longjmped"))
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
65 /* dropbear_exit jumped here */
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
66 }
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
67
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
68 return 0;
d32bcb5c557d Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
diff changeset
69 }