dropbear: fuzz/fuzz-common.c annotate

annotate fuzz/fuzz-common.c @ 1765:b688c884dad7

Fix fuzz-sshpacketmutator to work

author	Matt Johnston <matt@ucc.asn.au>
date	Mon, 26 Oct 2020 22:52:07 +0800
parents	2406a9987810
children	3e1e1f82eba6

rev	line source
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 #include "includes.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 #include "includes.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 #include "fuzz.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 #include "dbutil.h"
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 #include "runopts.h"
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	7 #include "crypto_desc.h"
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	8 #include "session.h"
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	9 #include "dbrandom.h"
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"
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	14 /* fuzz.h redefines stderr, we don't want that here */
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	15 #undef stderr
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	16
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	19 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	20 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	21 static void load_fixed_client_key(void);
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	23 // 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	24 void fuzz_early_setup(void) {
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	25 /* Set stderr to point to normal stderr by default */
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	26 fuzz.stderr = stderr;
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	27 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	28
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	29 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	30 disallow_core();
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 fuzz.fuzzing = 1;
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	32 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	33 fuzz.do_jmp = 1;
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	34 fuzz.input = m_malloc(sizeof(buffer));
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	35 _dropbear_log = fuzz_dropbear_log;
1350 2722f2347a48 crypto_init() Matt Johnston <matt@ucc.asn.au> parents: 1348 diff changeset	36 crypto_init();
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	37 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	38 /* 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	39 setlinebuf(stdout);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	40 #if DEBUG_TRACE
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	41 if (debug_trace)
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 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	44 }
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	45 else
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	46 #endif
1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	47 {
1765 b688c884dad7 Fix fuzz-sshpacketmutator to work Matt Johnston <matt@ucc.asn.au> parents: 1760 diff changeset	48 // fprintf(stderr, "Dropbear fuzzer: Disabling stderr output\n");
b688c884dad7 Fix fuzz-sshpacketmutator to work Matt Johnston <matt@ucc.asn.au> parents: 1760 diff changeset	49 // fuzz.stderr = fopen("/dev/null", "w");
b688c884dad7 Fix fuzz-sshpacketmutator to work Matt Johnston <matt@ucc.asn.au> parents: 1760 diff changeset	50 // assert(fuzz.stderr);
1758 1365661f6be6 Disable stderr output for fuzzer by default Matt Johnston <matt@ucc.asn.au> parents: 1757 diff changeset	51 }
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	53
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	54 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	55
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	56 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	57 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	58 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	59 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	60
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	61 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	62 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	63 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	64 wrapfd_setup(fuzz.input);
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	65
1757 517fb7b62438 Add some more variation to fuzzer random number generation Matt Johnston <matt@ucc.asn.au> parents: 1756 diff changeset	66 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	67
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	68 return DROPBEAR_SUCCESS;
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
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	71 #if DEBUG_TRACE
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	72 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	73 if (debug_trace) {
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	74 char printbuf[1024];
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	75 vsnprintf(printbuf, sizeof(printbuf), format, param);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	76 fprintf(stderr, "%s\n", printbuf);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	77 }
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	78 }
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	79 #else
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	80 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	81 /* No print */
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	82 }
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	83 #endif /* DEBUG_TRACE */
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	84
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	85 void fuzz_svr_setup(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	86 fuzz_common_setup();
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	87
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	88 _dropbear_exit = svr_dropbear_exit;
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	91 "dropbear",
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 "-E",
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 };
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 svr_getopts(argc, argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 load_fixed_hostkeys();
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
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	101 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	102 fuzz_common_setup();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	103
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	104 _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	105 _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	106
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	107 char *argv[] = {
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	108 "dbclient",
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	109 "-y",
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	110 "localhost",
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	111 "uptime"
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	112 };
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	113
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	114 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	115 cli_getopts(argc, argv);
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	116
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	117 load_fixed_client_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	118 /* Avoid password prompt */
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	119 setenv(DROPBEAR_PASSWORD_ENV, "password", 1);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	120 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	121
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	122 #include "fuzz-hostkeys.c"
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 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	125
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	126 buffer *b = buf_new(3000);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	127 sign_key *key;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	128 enum signkey_type keytype;
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 key = new_sign_key();
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	131 keytype = DROPBEAR_SIGNKEY_ANY;
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	132 buf_putbytes(b, keyed25519, keyed25519_len);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	133 buf_setpos(b, 0);
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	134 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	135 dropbear_exit("failed fixed ed25519 hostkey");
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	136 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	137 list_append(cli_opts.privkeys, key);
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 buf_free(b);
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	140 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	141
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 static void load_fixed_hostkeys(void) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 enum signkey_type type;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 TRACE(("load fixed hostkeys"))
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 svr_opts.hostkey = new_sign_key();
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 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 dropbear_exit("failed fixed rsa hostkey");
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
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 }
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 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	175 buf_setlen(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	176 buf_putbytes(b, keyed25519, keyed25519_len);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	177 buf_setpos(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	178 type = DROPBEAR_SIGNKEY_ED25519;
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	179 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	180 dropbear_exit("failed fixed ed25519 hostkey");
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	181 }
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	182
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 buf_free(b);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	186 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	187 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	188 }
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	189
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	190 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	191 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	192 if (local_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	193 *local_host = m_strdup("fuzzlocalhost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	194 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	195 if (local_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	196 *local_port = m_strdup("1234");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	197 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	198 if (remote_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	199 *remote_host = m_strdup("fuzzremotehost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	200 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	201 if (remote_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	202 *remote_port = m_strdup("9876");
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 }
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	205
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	206 /* 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	207 void fuzz_fake_send_kexdh_reply(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	208 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	209 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	210 mp_set_ul(ses.dh_K, 12345678uL);
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	211 finish_kexhashbuf();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	212 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	213
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	214 /* 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	215 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	216 *ret_writefd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	217 *ret_readfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	218 if (ret_errfd) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	219 *ret_errfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	220 }
1742 6e71440b1e47 Add fuzzer-client_nomaths, fix client fuzzer Matt Johnston <matt@ucc.asn.au> parents: 1741 diff changeset	221 *ret_pid = 999;
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	222 return DROPBEAR_SUCCESS;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	223 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	224
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	225 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	226 static int once = 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	227 if (!once) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	228 fuzz_svr_setup();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	229 fuzz.skip_kexmaths = skip_kexmaths;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	230 once = 1;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	231 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	232
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	233 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	234 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	235 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	236
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	237 /*
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	238 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	239 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	240 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	241 ... 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	242 [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	243 */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	244
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	245 /* be careful to avoid triggering buffer.c assertions */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	246 if (fuzz.input->len < 8) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	247 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	248 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	249 size_t prefix_size = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	250 if (prefix_size != 4) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	251 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	252 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	253 uint32_t wrapseed = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	254 wrapfd_setseed(wrapseed);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	255
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	256 int fakesock = wrapfd_new();
1456 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 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	259 fuzz.do_jmp = 1;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	260 if (setjmp(fuzz.jmp) == 0) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	261 svr_session(fakesock, fakesock);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	262 m_malloc_free_epoch(1, 0);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	263 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	264 fuzz.do_jmp = 0;
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	265 m_malloc_free_epoch(1, 1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	266 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	267 /* dropbear_exit jumped here */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	268 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	269
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	270 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	271 }
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	272
1741 d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	273 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	274 static int once = 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	275 if (!once) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	276 fuzz_cli_setup();
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	277 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	278 once = 1;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	279 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	280
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	281 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	282 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	283 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	284
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 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	287 string prefix
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	288 uint32 wrapfd seed
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	289 ... to be extended later
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	290 [bytes] ssh input stream
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	291 */
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 /* 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	294 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	295 return 0;
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	296 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	297 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	298 if (prefix_size != 4) {
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	299 return 0;
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 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	302 wrapfd_setseed(wrapseed);
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	303
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	304 int fakesock = wrapfd_new();
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 m_malloc_set_epoch(1);
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	307 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	308 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	309 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	310 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	311 } else {
1760 2406a9987810 Add first try at fuzzing custom mutator Matt Johnston <matt@ucc.asn.au> parents: 1758 diff changeset	312 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	313 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	314 TRACE(("dropbear_exit longjmped"))
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	315 /* dropbear_exit jumped here */
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	316 }
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	317
d1b279aa5ed1 Get client fuzzer building and starting (fails straight away) Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	318 return 0;
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
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	321 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	322 const algo_type *t;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	323 for (t = algos; t->name; t++) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	324 if (strcmp(t->name, name) == 0) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	325 return t->data;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	326 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	327 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	328 assert(0);
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	329 }
1751 3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	330
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	331 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	332 TRACE(("dump %zu", len))
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	333 if (fuzz.dumping) {
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	334 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	335 }
3b9b427925a0 Load password and key for client fuzzer. Matt Johnston <matt@ucc.asn.au> parents: 1742 diff changeset	336 }

Mercurial > dropbear

annotate fuzz/fuzz-common.c @ 1765:b688c884dad7