xref: /openssl/fuzz/test-corpus.c (revision eec0ad10)
1 /*
2  * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  * https://www.openssl.org/source/license.html
8  * or in the file LICENSE in the source distribution.
9  */
10 
11 /*
12  * Given a list of files, run each of them through the fuzzer.  Note that
13  * failure will be indicated by some kind of crash. Switching on things like
14  * asan improves the test.
15  */
16 
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <sys/stat.h>
21 #include <openssl/crypto.h>
22 #include "fuzzer.h"
23 #include "internal/o_dir.h"
24 
25 #if defined(_WIN32) && defined(_MAX_PATH) && !defined(PATH_MAX)
26 # define PATH_MAX _MAX_PATH
27 #endif
28 
29 #ifndef PATH_MAX
30 # define PATH_MAX 4096
31 #endif
32 
33 # if !defined(S_ISREG)
34 #   define S_ISREG(m) ((m) & S_IFREG)
35 # endif
36 
testfile(const char * pathname)37 static void testfile(const char *pathname)
38 {
39     struct stat st;
40     FILE *f;
41     unsigned char *buf;
42     size_t s;
43 
44     if (stat(pathname, &st) < 0 || !S_ISREG(st.st_mode))
45         return;
46     printf("# %s\n", pathname);
47     fflush(stdout);
48     f = fopen(pathname, "rb");
49     if (f == NULL)
50         return;
51     buf = malloc(st.st_size);
52     if (buf != NULL) {
53         s = fread(buf, 1, st.st_size, f);
54         OPENSSL_assert(s == (size_t)st.st_size);
55         FuzzerTestOneInput(buf, s);
56         free(buf);
57     }
58     fclose(f);
59 }
60 
main(int argc,char ** argv)61 int main(int argc, char **argv) {
62     int n;
63 
64     FuzzerInitialize(&argc, &argv);
65 
66     for (n = 1; n < argc; ++n) {
67         size_t dirname_len = strlen(argv[n]);
68         const char *filename = NULL;
69         char *pathname = NULL;
70         OPENSSL_DIR_CTX *ctx = NULL;
71         int wasdir = 0;
72 
73         /*
74          * We start with trying to read the given path as a directory.
75          */
76         while ((filename = OPENSSL_DIR_read(&ctx, argv[n])) != NULL) {
77             wasdir = 1;
78             if (pathname == NULL) {
79                 pathname = malloc(PATH_MAX);
80                 if (pathname == NULL)
81                     break;
82                 strcpy(pathname, argv[n]);
83 #ifdef __VMS
84                 if (strchr(":<]", pathname[dirname_len - 1]) == NULL)
85 #endif
86                     pathname[dirname_len++] = '/';
87                 pathname[dirname_len] = '\0';
88             }
89             strcpy(pathname + dirname_len, filename);
90             testfile(pathname);
91         }
92         OPENSSL_DIR_end(&ctx);
93 
94         /* If it wasn't a directory, treat it as a file instead */
95         if (!wasdir)
96             testfile(argv[n]);
97 
98         free(pathname);
99     }
100 
101     FuzzerCleanup();
102 
103     return 0;
104 }
105