dropbear: fuzz/fuzz-common.c annotate

annotate fuzz/fuzz-common.c @ 1768:096a66e45212

Fix fuzzing stderr override on os x

author	Matt Johnston <matt@ucc.asn.au>
date	Mon, 26 Oct 2020 23:44:43 +0800
parents	3e1e1f82eba6
children	66b29b054896

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 "dbutil.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 #include "runopts.h"
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	6 #include "crypto_desc.h"
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	7 #include "session.h"
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	8 #include "dbrandom.h"
1457 32f990cc96b1 fix bad assertion Matt Johnston <matt@ucc.asn.au> parents: 1456 diff changeset	9 #include "bignum.h"
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	10 #include "atomicio.h"
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	11 #include "fuzz-wrapfd.h"
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	13 #define FUZZ_NO_REPLACE_STDERR
096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	14 #include "fuzz.h"
096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	15
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	16 /* fuzz.h redefines stderr, we don't want that here */
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	17 #ifdef origstderr
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	18 #undef stderr
1768 096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	19 #define stderr origstderr
096a66e45212 Fix fuzzing stderr override on os x Matt Johnston <matt@ucc.asn.au> parents: 1767 diff changeset	20 #endif // origstderr
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	21
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	24 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	25 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	26 static void load_fixed_client_key(void);
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	28 // 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	29 void fuzz_early_setup(void) {
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	30 /* 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	31 fuzz.fake_stderr = stderr;
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	32 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	33
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	34 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	35 disallow_core();
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 fuzz.fuzzing = 1;
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	37 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	38 fuzz.do_jmp = 1;
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	39 fuzz.input = m_malloc(sizeof(buffer));
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	40 _dropbear_log = fuzz_dropbear_log;
1350 2722f2347a48 crypto_init() Matt Johnston <matt@ucc.asn.au> parents: 1348 diff changeset	41 crypto_init();
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	42 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	43 /* 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	44 setlinebuf(stdout);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	45 #if DEBUG_TRACE
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	46 if (debug_trace)
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	47 {
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	48 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	49 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	50 else
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	51 #endif
1767 3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	52 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	53 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	54 }
3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	55 else
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	56 {
1767 3e1e1f82eba6 Preallocate memory for sshpacketmutator. Add fuzzer-client_mutator_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1765 diff changeset	57 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	58 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	59 assert(fuzz.fake_stderr);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	60 }
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	63 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	64
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	65 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	66 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	67 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	68 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	69
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	70 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	71 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	72 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	73 wrapfd_setup(fuzz.input);
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	74
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	75 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	76
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	77 return DROPBEAR_SUCCESS;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	78 }
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	79
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	80 #if DEBUG_TRACE
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	81 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	82 if (debug_trace) {
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	83 char printbuf[1024];
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	84 vsnprintf(printbuf, sizeof(printbuf), format, param);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	85 fprintf(stderr, "%s\n", printbuf);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	86 }
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	87 }
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	88 #else
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	89 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	90 /* No print */
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	91 }
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	92 #endif /* DEBUG_TRACE */
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	93
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	94 void fuzz_svr_setup(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	95 fuzz_common_setup();
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	96
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	97 _dropbear_exit = svr_dropbear_exit;
1348 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 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	100 "dropbear",
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 "-E",
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 };
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 svr_getopts(argc, argv);
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 load_fixed_hostkeys();
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	110 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	111 fuzz_common_setup();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	112
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	113 _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	114 _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	115
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	116 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	117 "dbclient",
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	118 "-y",
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	119 "localhost",
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	120 "uptime"
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	121 };
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	122
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	123 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	124 cli_getopts(argc, argv);
1751 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 load_fixed_client_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	127 /* Avoid password prompt */
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	128 setenv(DROPBEAR_PASSWORD_ENV, "password", 1);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	129 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	130
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	131 #include "fuzz-hostkeys.c"
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	132
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	133 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	134
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	135 buffer *b = buf_new(3000);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	136 sign_key *key;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	137 enum signkey_type keytype;
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 key = new_sign_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	140 keytype = DROPBEAR_SIGNKEY_ANY;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	141 buf_putbytes(b, keyed25519, keyed25519_len);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	142 buf_setpos(b, 0);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	143 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	144 dropbear_exit("failed fixed ed25519 hostkey");
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	145 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	146 list_append(cli_opts.privkeys, key);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	147
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	148 buf_free(b);
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	149 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	150
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 static void load_fixed_hostkeys(void) {
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 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 enum signkey_type type;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 TRACE(("load fixed hostkeys"))
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 svr_opts.hostkey = new_sign_key();
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 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 dropbear_exit("failed fixed rsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 }
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 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 }
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 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	184 buf_setlen(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	185 buf_putbytes(b, keyed25519, keyed25519_len);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	186 buf_setpos(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	187 type = DROPBEAR_SIGNKEY_ED25519;
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	188 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	189 dropbear_exit("failed fixed ed25519 hostkey");
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	190 }
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	191
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 buf_free(b);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	195 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	196 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	197 }
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	198
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	199 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	200 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	201 if (local_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	202 *local_host = m_strdup("fuzzlocalhost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	203 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	204 if (local_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	205 *local_port = m_strdup("1234");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	206 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	207 if (remote_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	208 *remote_host = m_strdup("fuzzremotehost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	209 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	210 if (remote_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	211 *remote_port = m_strdup("9876");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	212 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	213 }
1456 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 /* 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	216 void fuzz_fake_send_kexdh_reply(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	217 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	218 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	219 mp_set_ul(ses.dh_K, 12345678uL);
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	220 finish_kexhashbuf();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	221 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	222
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	223 /* 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	224 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	225 *ret_writefd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	226 *ret_readfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	227 if (ret_errfd) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	228 *ret_errfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	229 }
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	230 *ret_pid = 999;
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	231 return DROPBEAR_SUCCESS;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	232 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	233
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	234 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	235 static int once = 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	236 if (!once) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	237 fuzz_svr_setup();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	238 fuzz.skip_kexmaths = skip_kexmaths;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	239 once = 1;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	240 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	241
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	242 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	243 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	244 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	245
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	246 /*
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	247 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	248 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	249 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	250 ... 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	251 [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	252 */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	253
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	254 /* be careful to avoid triggering buffer.c assertions */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	255 if (fuzz.input->len < 8) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	256 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	257 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	258 size_t prefix_size = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	259 if (prefix_size != 4) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	260 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	261 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	262 uint32_t wrapseed = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	263 wrapfd_setseed(wrapseed);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	264
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	265 int fakesock = wrapfd_new();
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	266
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	267 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	268 fuzz.do_jmp = 1;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	269 if (setjmp(fuzz.jmp) == 0) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	270 svr_session(fakesock, fakesock);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	271 m_malloc_free_epoch(1, 0);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	272 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	273 fuzz.do_jmp = 0;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	274 m_malloc_free_epoch(1, 1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	275 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	276 /* dropbear_exit jumped here */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	277 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	278
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	279 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	280 }
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	281
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	282 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	283 static int once = 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	284 if (!once) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	285 fuzz_cli_setup();
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	286 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	287 once = 1;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	288 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	289
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	290 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	291 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	292 }
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 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	296 string prefix
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	297 uint32 wrapfd seed
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	298 ... to be extended later
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	299 [bytes] ssh input stream
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	300 */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	301
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	302 /* 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	303 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	304 return 0;
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 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	307 if (prefix_size != 4) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	308 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	309 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	310 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	311 wrapfd_setseed(wrapseed);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	312
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	313 int fakesock = wrapfd_new();
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	314
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	315 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	316 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	317 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	318 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	319 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	320 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	321 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	322 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	323 TRACE(("dropbear_exit longjmped"))
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	324 /* dropbear_exit jumped here */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	325 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	326
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	327 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	328 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	329
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	330 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	331 const algo_type *t;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	332 for (t = algos; t->name; t++) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	333 if (strcmp(t->name, name) == 0) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	334 return t->data;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	335 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	336 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	337 assert(0);
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	338 }
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	339
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	340 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	341 TRACE(("dump %zu", len))
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	342 if (fuzz.dumping) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	343 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	344 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	345 }

Mercurial > dropbear

annotate fuzz/fuzz-common.c @ 1768:096a66e45212