dropbear: fuzz/fuzz-common.c annotate

annotate fuzz/fuzz-common.c @ 1770:66b29b054896

Fix FUZZ_NO_REPLACE_STDERR for fuzz.c

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 29 Oct 2020 22:14:38 +0800
parents	096a66e45212
children	833bf9947603

rev	line source
1770 66b29b054896 Fix FUZZ_NO_REPLACE_STDERR for fuzz.c Matt Johnston <matt@ucc.asn.au> parents: 1768 diff changeset	1 #define FUZZ_NO_REPLACE_STDERR
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 #include "includes.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 #include "includes.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"
1457 32f990cc96b1 fix bad assertion Matt Johnston <matt@ucc.asn.au> parents: 1456 diff changeset	10 #include "bignum.h"
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	11 #include "atomicio.h"
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	12 #include "fuzz-wrapfd.h"
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	13 #include "fuzz.h"
096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	14
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	17 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param);
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 static void load_fixed_hostkeys(void);
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	19 static void load_fixed_client_key(void);
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	21 // This runs automatically before main, due to contructor attribute in fuzz.h
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	22 void fuzz_early_setup(void) {
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	23 /* Set stderr to point to normal stderr by default */
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	24 fuzz.fake_stderr = stderr;
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	25 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	26
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	27 void fuzz_common_setup(void) {
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	28 disallow_core();
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 fuzz.fuzzing = 1;
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	30 fuzz.wrapfds = 1;
1385 6c92e97553f1 Add a flag whether to longjmp, missed that last commit Matt Johnston <matt@ucc.asn.au> parents: 1383 diff changeset	31 fuzz.do_jmp = 1;
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	32 fuzz.input = m_malloc(sizeof(buffer));
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	33 _dropbear_log = fuzz_dropbear_log;
1350 2722f2347a48 crypto_init() Matt Johnston <matt@ucc.asn.au> parents: 1348 diff changeset	34 crypto_init();
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	35 fuzz_seed("start", 5);
1529 66a1a2547133 The fuzzer has managed to generated DSS key/signature pairs that Matt Johnston <matt@ucc.asn.au> parents: 1457 diff changeset	36 /* let any messages get flushed */
66a1a2547133 The fuzzer has managed to generated DSS key/signature pairs that Matt Johnston <matt@ucc.asn.au> parents: 1457 diff changeset	37 setlinebuf(stdout);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	38 #if DEBUG_TRACE
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	39 if (debug_trace)
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	40 {
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	41 fprintf(stderr, "Dropbear fuzzer: -v specified, not disabling stderr output\n");
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	42 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	43 else
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	44 #endif
1767 3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	45 if (getenv("DROPBEAR_KEEP_STDERR")) {
3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	46 fprintf(stderr, "Dropbear fuzzer: DROPBEAR_KEEP_STDERR, not disabling stderr output\n");
3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	47 }
3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	48 else
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	49 {
1767 3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	50 fprintf(stderr, "Dropbear fuzzer: Disabling stderr output\n");
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	51 fuzz.fake_stderr = fopen("/dev/null", "w");
096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	52 assert(fuzz.fake_stderr);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	53 }
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	56 int fuzz_set_input(const uint8_t *Data, size_t Size) {
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	57
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	58 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	59 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	60 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	61 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	62
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	63 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	64 memset(&svr_ses, 0x0, sizeof(svr_ses));
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	65 memset(&cli_ses, 0x0, sizeof(cli_ses));
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	66 wrapfd_setup(fuzz.input);
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	67
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	68 fuzz_seed(fuzz.input->data, MIN(fuzz.input->len, 16));
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	69
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	70 return DROPBEAR_SUCCESS;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	71 }
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	72
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	73 #if DEBUG_TRACE
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	74 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param) {
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	75 if (debug_trace) {
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	76 char printbuf[1024];
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	77 vsnprintf(printbuf, sizeof(printbuf), format, param);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	78 fprintf(stderr, "%s\n", printbuf);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	79 }
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	80 }
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	81 #else
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	82 static void fuzz_dropbear_log(int UNUSED(priority), const char* UNUSED(format), va_list UNUSED(param)) {
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	83 /* No print */
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	84 }
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	85 #endif /* DEBUG_TRACE */
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	86
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	87 void fuzz_svr_setup(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	88 fuzz_common_setup();
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	89
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	90 _dropbear_exit = svr_dropbear_exit;
1348 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 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	93 "dropbear",
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 "-E",
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 };
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 svr_getopts(argc, argv);
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 load_fixed_hostkeys();
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	103 void fuzz_cli_setup(void) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	104 fuzz_common_setup();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	105
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	106 _dropbear_exit = cli_dropbear_exit;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	107 _dropbear_log = cli_dropbear_log;
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	108
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	109 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	110 "dbclient",
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	111 "-y",
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	112 "localhost",
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	113 "uptime"
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	114 };
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	115
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	116 int argc = sizeof(argv) / sizeof(*argv);
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	117 cli_getopts(argc, argv);
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	118
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	119 load_fixed_client_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	120 /* Avoid password prompt */
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	121 setenv(DROPBEAR_PASSWORD_ENV, "password", 1);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	122 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	123
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	124 #include "fuzz-hostkeys.c"
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	125
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	126 static void load_fixed_client_key(void) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	127
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	128 buffer *b = buf_new(3000);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	129 sign_key *key;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	130 enum signkey_type keytype;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	131
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	132 key = new_sign_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	133 keytype = DROPBEAR_SIGNKEY_ANY;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	134 buf_putbytes(b, keyed25519, keyed25519_len);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	135 buf_setpos(b, 0);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	136 if (buf_get_priv_key(b, key, &keytype) == DROPBEAR_FAILURE) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	137 dropbear_exit("failed fixed ed25519 hostkey");
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	138 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	139 list_append(cli_opts.privkeys, key);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	140
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	141 buf_free(b);
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	142 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	143
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 static void load_fixed_hostkeys(void) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 enum signkey_type type;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 TRACE(("load fixed hostkeys"))
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 svr_opts.hostkey = new_sign_key();
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 dropbear_exit("failed fixed rsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	177 buf_setlen(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	178 buf_putbytes(b, keyed25519, keyed25519_len);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	179 buf_setpos(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	180 type = DROPBEAR_SIGNKEY_ED25519;
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	181 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	182 dropbear_exit("failed fixed ed25519 hostkey");
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	183 }
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	184
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 buf_free(b);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	188 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	189 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	190 }
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	191
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	192 void fuzz_get_socket_address(int UNUSED(fd), char local_host, char local_port,
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	193 char remote_host, char remote_port, int UNUSED(host_lookup)) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	194 if (local_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	195 *local_host = m_strdup("fuzzlocalhost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	196 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	197 if (local_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	198 *local_port = m_strdup("1234");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	199 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	200 if (remote_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	201 *remote_host = m_strdup("fuzzremotehost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	202 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	203 if (remote_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	204 *remote_port = m_strdup("9876");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	205 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	206 }
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	207
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	208 /* cut down version of svr_send_msg_kexdh_reply() that skips slow maths. Still populates structures */
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	209 void fuzz_fake_send_kexdh_reply(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	210 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	211 m_mp_alloc_init_multi(&ses.dh_K, NULL);
1692 1051e4eea25a Update LibTomMath to 1.2.0 (#84) Steffen Jaeckel <s@jaeckel.eu> parents: 1659 diff changeset	212 mp_set_ul(ses.dh_K, 12345678uL);
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	213 finish_kexhashbuf();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	214 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	215
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	216 /* fake version of spawn_command() */
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	217 int fuzz_spawn_command(int ret_writefd, int ret_readfd, int ret_errfd, pid_t ret_pid) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	218 *ret_writefd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	219 *ret_readfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	220 if (ret_errfd) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	221 *ret_errfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	222 }
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	223 *ret_pid = 999;
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	224 return DROPBEAR_SUCCESS;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	225 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	226
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	227 int fuzz_run_preauth(const uint8_t *Data, size_t Size, int skip_kexmaths) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	228 static int once = 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	229 if (!once) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	230 fuzz_svr_setup();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	231 fuzz.skip_kexmaths = skip_kexmaths;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	232 once = 1;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	233 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	234
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	235 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	236 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	237 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	238
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	239 /*
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	240 get prefix, allowing for future extensibility. input format is
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	241 string prefix
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	242 uint32 wrapfd seed
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	243 ... to be extended later
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	244 [bytes] ssh input stream
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	245 */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	246
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	247 /* be careful to avoid triggering buffer.c assertions */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	248 if (fuzz.input->len < 8) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	249 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	250 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	251 size_t prefix_size = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	252 if (prefix_size != 4) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	253 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	254 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	255 uint32_t wrapseed = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	256 wrapfd_setseed(wrapseed);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	257
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	258 int fakesock = wrapfd_new();
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	259
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	260 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	261 fuzz.do_jmp = 1;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	262 if (setjmp(fuzz.jmp) == 0) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	263 svr_session(fakesock, fakesock);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	264 m_malloc_free_epoch(1, 0);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	265 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	266 fuzz.do_jmp = 0;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	267 m_malloc_free_epoch(1, 1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	268 TRACE(("dropbear_exit longjmped"))
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	269 /* dropbear_exit jumped here */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	270 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	271
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	272 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	273 }
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	274
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	275 int fuzz_run_client(const uint8_t *Data, size_t Size, int skip_kexmaths) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	276 static int once = 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	277 if (!once) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	278 fuzz_cli_setup();
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	279 fuzz.skip_kexmaths = skip_kexmaths;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	280 once = 1;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	281 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	282
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	283 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	284 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	285 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	286
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	287 /*
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	288 get prefix, allowing for future extensibility. input format is
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	289 string prefix
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	290 uint32 wrapfd seed
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	291 ... to be extended later
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	292 [bytes] ssh input stream
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	293 */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	294
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	295 /* be careful to avoid triggering buffer.c assertions */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	296 if (fuzz.input->len < 8) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	297 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	298 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	299 size_t prefix_size = buf_getint(fuzz.input);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	300 if (prefix_size != 4) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	301 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	302 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	303 uint32_t wrapseed = buf_getint(fuzz.input);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	304 wrapfd_setseed(wrapseed);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	305
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	306 int fakesock = wrapfd_new();
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	307
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	308 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	309 fuzz.do_jmp = 1;
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	310 if (setjmp(fuzz.jmp) == 0) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	311 cli_session(fakesock, fakesock, NULL, 0);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	312 m_malloc_free_epoch(1, 0);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	313 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	314 fuzz.do_jmp = 0;
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	315 m_malloc_free_epoch(1, 1);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	316 TRACE(("dropbear_exit longjmped"))
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	317 /* dropbear_exit jumped here */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	318 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	319
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	320 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	321 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	322
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	323 const void* fuzz_get_algo(const algo_type algos, const char name) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	324 const algo_type *t;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	325 for (t = algos; t->name; t++) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	326 if (strcmp(t->name, name) == 0) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	327 return t->data;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	328 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	329 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	330 assert(0);
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	331 }
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	332
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	333 void fuzz_dump(const unsigned char* data, size_t len) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	334 TRACE(("dump %zu", len))
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	335 if (fuzz.dumping) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	336 assert(atomicio(vwrite, fuzz.recv_dumpfd, (void*)data, len) == len);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	337 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	338 }

Mercurial > dropbear

annotate fuzz/fuzz-common.c @ 1770:66b29b054896