dropbear: fuzz-common.c annotate

annotate fuzz-common.c @ 1740:dfbe947bdf0d fuzz

Make wrapfd share a common buffer for all FDs

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 15 Oct 2020 22:46:24 +0800
parents	1051e4eea25a
children	d1b279aa5ed1

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"
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
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 struct dropbear_fuzz_options fuzz;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	15 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	16 static void load_fixed_hostkeys(void);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	18 void fuzz_common_setup(void) {
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 fuzz.fuzzing = 1;
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	20 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	21 fuzz.do_jmp = 1;
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	22 fuzz.input = m_malloc(sizeof(buffer));
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	23 _dropbear_log = fuzz_dropbear_log;
1350 2722f2347a48 crypto_init() Matt Johnston <matt@ucc.asn.au> parents: 1348 diff changeset	24 crypto_init();
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	25 fuzz_seed();
1529 66a1a2547133 The fuzzer has managed to generated DSS key/signature pairs that Matt Johnston <matt@ucc.asn.au> parents: 1457 diff changeset	26 /* 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	27 setlinebuf(stdout);
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	30 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	31
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	32 fuzz.input->data = (unsigned char*)Data;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	33 fuzz.input->size = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	34 fuzz.input->len = Size;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	35 fuzz.input->pos = 0;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	36
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	37 memset(&ses, 0x0, sizeof(ses));
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1357 diff changeset	38 memset(&svr_ses, 0x0, sizeof(svr_ses));
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	39 wrapfd_setup(fuzz.input);
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	40
1369 ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1358 diff changeset	41 fuzz_seed();
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	42
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	43 return DROPBEAR_SUCCESS;
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	44 }
3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	45
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	46 #if DEBUG_TRACE
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	47 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	48 if (debug_trace) {
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	49 char printbuf[1024];
1373 9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	50 vsnprintf(printbuf, sizeof(printbuf), format, param);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	51 fprintf(stderr, "%s\n", printbuf);
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	52 }
9891bc31a1b3 fuzzers disable logging by default Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	53 }
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	54 #else
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	55 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	56 /* No print */
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	57 }
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1529 diff changeset	58 #endif /* DEBUG_TRACE */
1356 3677a510f545 add wrapfd. improve fuzzer in makefile Matt Johnston <matt@ucc.asn.au> parents: 1353 diff changeset	59
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	60 void fuzz_svr_setup(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	61 fuzz_common_setup();
1353 f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	62
f3c8975de38e setup svr_dropbear_exit Matt Johnston <matt@ucc.asn.au> parents: 1350 diff changeset	63 _dropbear_exit = svr_dropbear_exit;
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 char *argv[] = {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 "-E",
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 };
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 int argc = sizeof(argv) / sizeof(*argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70 svr_getopts(argc, argv);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72 /* user lookups might be slow, cache it */
1386 f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp Matt Johnston <matt@ucc.asn.au> parents: 1385 diff changeset	73 fuzz.pw_name = m_strdup("person");
f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp Matt Johnston <matt@ucc.asn.au> parents: 1385 diff changeset	74 fuzz.pw_dir = m_strdup("/tmp");
f0990c284663 fuzzer-preauth don't call getpwnam(), bring back longjmp Matt Johnston <matt@ucc.asn.au> parents: 1385 diff changeset	75 fuzz.pw_shell = m_strdup("/bin/zsh");
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 fuzz.pw_passwd = m_strdup("!!zzznope");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78 load_fixed_hostkeys();
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	81 #if 0
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	82 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	83 fuzz_common_setup();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	84
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	85 _dropbear_exit = cli_dropbear_exit;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	86
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	87 char *argv[] = {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	88 "-E",
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	89 };
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	90
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	91 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	92 cli_getopts(argc, argv);
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	93
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	94 /* user lookups might be slow, cache it */
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	95 fuzz.pw_name = m_strdup("person");
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	96 fuzz.pw_dir = m_strdup("/tmp");
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	97 fuzz.pw_shell = m_strdup("/bin/zsh");
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	98 fuzz.pw_passwd = m_strdup("!!zzznope");
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	99
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	100 load_fixed_hostkeys();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	101 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	102 #endif
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	103
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 static void load_fixed_hostkeys(void) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 #include "fuzz-hostkeys.c"
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 buffer *b = buf_new(3000);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 enum signkey_type type;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 TRACE(("load fixed hostkeys"))
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 svr_opts.hostkey = new_sign_key();
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 buf_putbytes(b, keyr, keyr_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 type = DROPBEAR_SIGNKEY_RSA;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 dropbear_exit("failed fixed rsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123 buf_putbytes(b, keyd, keyd_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 type = DROPBEAR_SIGNKEY_DSS;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 dropbear_exit("failed fixed dss hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 buf_setlen(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 buf_putbytes(b, keye, keye_len);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 buf_setpos(b, 0);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256;
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) {
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 dropbear_exit("failed fixed ecdsa hostkey");
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137
1659 d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	138 buf_setlen(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	139 buf_putbytes(b, keyed25519, keyed25519_len);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	140 buf_setpos(b, 0);
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	141 type = DROPBEAR_SIGNKEY_ED25519;
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	142 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	143 dropbear_exit("failed fixed ed25519 hostkey");
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	144 }
d32bcb5c557d Add Ed25519 support (#91) Vladislav Grishenko <themiron@users.noreply.github.com> parents: 1589 diff changeset	145
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 buf_free(b);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148
1357 08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	149 void fuzz_kex_fakealgos(void) {
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	150 ses.newkeys->recv.crypt_mode = &dropbear_mode_none;
08f4fa4dc6a0 closer to working Matt Johnston <matt@ucc.asn.au> parents: 1356 diff changeset	151 }
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	152
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	153 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	154 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	155 if (local_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	156 *local_host = m_strdup("fuzzlocalhost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	157 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	158 if (local_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	159 *local_port = m_strdup("1234");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	160 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	161 if (remote_host) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	162 *remote_host = m_strdup("fuzzremotehost");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	163 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	164 if (remote_port) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	165 *remote_port = m_strdup("9876");
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	166 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1377 diff changeset	167 }
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	168
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	169 /* 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	170 void fuzz_fake_send_kexdh_reply(void) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	171 assert(!ses.dh_K);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	172 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	173 mp_set_ul(ses.dh_K, 12345678uL);
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	174 finish_kexhashbuf();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	175 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	176
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	177 /* 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	178 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	179 *ret_writefd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	180 *ret_readfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	181 if (ret_errfd) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	182 *ret_errfd = wrapfd_new();
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	183 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	184 ret_pid = 999;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	185 return DROPBEAR_SUCCESS;
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	186 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	187
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	188 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	189 static int once = 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	190 if (!once) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	191 fuzz_svr_setup();
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	192 fuzz.skip_kexmaths = skip_kexmaths;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	193 once = 1;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	194 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	195
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	196 if (fuzz_set_input(Data, Size) == DROPBEAR_FAILURE) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	197 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	198 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	199
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	200 /*
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	201 get prefix. input format is
92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	202 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	203 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	204 ... 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	205 [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	206 */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	207
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	208 /* be careful to avoid triggering buffer.c assertions */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	209 if (fuzz.input->len < 8) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	210 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	211 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	212 size_t prefix_size = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	213 if (prefix_size != 4) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	214 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	215 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	216 uint32_t wrapseed = buf_getint(fuzz.input);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	217 wrapfd_setseed(wrapseed);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	218
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1692 diff changeset	219 int fakesock = wrapfd_new();
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	220
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	221 m_malloc_set_epoch(1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	222 if (setjmp(fuzz.jmp) == 0) {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	223 svr_session(fakesock, fakesock);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	224 m_malloc_free_epoch(1, 0);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	225 } else {
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	226 m_malloc_free_epoch(1, 1);
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	227 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	228 /* dropbear_exit jumped here */
1456 a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	229 }
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	230
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	231 return 0;
a90fdd2d2ed8 add fuzzer-preauth_nomaths Matt Johnston <matt@ucc.asn.au> parents: 1386 diff changeset	232 }
1589 35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	233
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	234 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	235 const algo_type *t;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	236 for (t = algos; t->name; t++) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	237 if (strcmp(t->name, name) == 0) {
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	238 return t->data;
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	239 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	240 }
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	241 assert(0);
35af85194268 Add kexdh and kexecdh fuzzers Matt Johnston <matt@ucc.asn.au> parents: 1559 diff changeset	242 }

Mercurial > dropbear

annotate fuzz-common.c @ 1740:dfbe947bdf0d fuzz