Mercurial > dropbear
annotate fuzz-common.c @ 1380:d201105df2ed fuzz
add fuzzer-verify
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Fri, 26 May 2017 00:20:01 +0800 |
| parents | d4cc85e6c569 |
| children | f03cfe9c76ac |
| rev | line source |
|---|---|
| 1348 | 1 #include "includes.h" |
| 2 | |
| 3 #include "includes.h" | |
| 4 #include "fuzz.h" | |
| 5 #include "dbutil.h" | |
| 6 #include "runopts.h" | |
| 1353 | 7 #include "crypto_desc.h" |
| 8 #include "session.h" | |
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9 #include "dbrandom.h" |
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10 #include "fuzz-wrapfd.h" |
| 1348 | 11 |
| 12 struct dropbear_fuzz_options fuzz; | |
| 13 | |
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14 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param); |
| 1348 | 15 static void load_fixed_hostkeys(void); |
| 16 | |
| 1369 | 17 void common_setup_fuzzer(void) { |
| 1348 | 18 fuzz.fuzzing = 1; |
| 1357 | 19 fuzz.wrapfds = 1; |
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20 fuzz.input = m_malloc(sizeof(buffer)); |
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21 _dropbear_log = fuzz_dropbear_log; |
| 1350 | 22 crypto_init(); |
| 1348 | 23 } |
| 24 | |
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25 int fuzzer_set_input(const uint8_t *Data, size_t Size) { |
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26 |
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27 fuzz.input->data = (unsigned char*)Data; |
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28 fuzz.input->size = Size; |
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29 fuzz.input->len = Size; |
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30 fuzz.input->pos = 0; |
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31 |
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32 memset(&ses, 0x0, sizeof(ses)); |
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33 memset(&svr_ses, 0x0, sizeof(svr_ses)); |
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34 wrapfd_setup(); |
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35 |
| 1369 | 36 fuzz_seed(); |
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37 |
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38 return DROPBEAR_SUCCESS; |
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39 } |
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40 |
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41 static void fuzz_dropbear_log(int UNUSED(priority), const char* format, va_list param) { |
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42 |
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43 char printbuf[1024]; |
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44 |
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45 #if DEBUG_TRACE |
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46 if (debug_trace) { |
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47 vsnprintf(printbuf, sizeof(printbuf), format, param); |
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48 fprintf(stderr, "%s\n", printbuf); |
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49 } |
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50 #endif |
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51 } |
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52 |
| 1348 | 53 void svr_setup_fuzzer(void) { |
| 54 struct passwd *pw; | |
| 55 | |
| 56 common_setup_fuzzer(); | |
| 1353 | 57 |
| 58 _dropbear_exit = svr_dropbear_exit; | |
| 1348 | 59 |
| 60 char *argv[] = { | |
| 61 "-E", | |
| 62 }; | |
| 63 | |
| 64 int argc = sizeof(argv) / sizeof(*argv); | |
| 65 svr_getopts(argc, argv); | |
| 66 | |
| 67 /* user lookups might be slow, cache it */ | |
| 68 pw = getpwuid(getuid()); | |
| 69 dropbear_assert(pw); | |
| 70 fuzz.pw_name = m_strdup(pw->pw_name); | |
| 71 fuzz.pw_dir = m_strdup(pw->pw_dir); | |
| 72 fuzz.pw_shell = m_strdup(pw->pw_shell); | |
| 73 fuzz.pw_passwd = m_strdup("!!zzznope"); | |
| 74 | |
| 75 load_fixed_hostkeys(); | |
| 76 } | |
| 77 | |
| 78 static void load_fixed_hostkeys(void) { | |
| 79 #include "fuzz-hostkeys.c" | |
| 80 | |
| 81 buffer *b = buf_new(3000); | |
| 82 enum signkey_type type; | |
| 83 | |
| 84 TRACE(("load fixed hostkeys")) | |
| 85 | |
| 86 svr_opts.hostkey = new_sign_key(); | |
| 87 | |
| 88 buf_setlen(b, 0); | |
| 89 buf_putbytes(b, keyr, keyr_len); | |
| 90 buf_setpos(b, 0); | |
| 91 type = DROPBEAR_SIGNKEY_RSA; | |
| 92 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { | |
| 93 dropbear_exit("failed fixed rsa hostkey"); | |
| 94 } | |
| 95 | |
| 96 buf_setlen(b, 0); | |
| 97 buf_putbytes(b, keyd, keyd_len); | |
| 98 buf_setpos(b, 0); | |
| 99 type = DROPBEAR_SIGNKEY_DSS; | |
| 100 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { | |
| 101 dropbear_exit("failed fixed dss hostkey"); | |
| 102 } | |
| 103 | |
| 104 buf_setlen(b, 0); | |
| 105 buf_putbytes(b, keye, keye_len); | |
| 106 buf_setpos(b, 0); | |
| 107 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256; | |
| 108 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { | |
| 109 dropbear_exit("failed fixed ecdsa hostkey"); | |
| 110 } | |
| 111 | |
| 112 buf_free(b); | |
| 113 } | |
| 114 | |
| 1357 | 115 void fuzz_kex_fakealgos(void) { |
| 116 ses.newkeys->recv.crypt_mode = &dropbear_mode_none; | |
| 117 } |