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/*
* Copyright (c) 2017-2021 Free Software Foundation, Inc.
*
* This file is part of GNU Wget.
*
* GNU Wget is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GNU Wget is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Wget. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include "fuzzer.h"
#include "utils.h"
#ifdef TEST_RUN
#include <dirent.h>
#ifdef _WIN32
# define SLASH '\\'
#else
# define SLASH '/'
#endif
static int test_all_from(const char *dirname)
{
DIR *dirp;
if ((dirp = opendir(dirname))) {
struct dirent *dp;
while ((dp = readdir(dirp))) {
if (*dp->d_name == '.') continue;
char fname[strlen(dirname) + strlen(dp->d_name) + 2];
snprintf(fname, sizeof(fname), "%s/%s", dirname, dp->d_name);
struct file_memory *fmem;
if ((fmem = wget_read_file(fname))) {
printf("testing %ld bytes from '%s'\n", fmem->length, fname);
fflush(stdout);
LLVMFuzzerTestOneInput((uint8_t *)fmem->content, fmem->length);
wget_read_file_free(fmem);
}
}
closedir(dirp);
return 0;
}
return 1;
}
int main(int argc, char **argv)
{
// if VALGRIND testing is enabled, we have to call ourselves with valgrind checking
const char *valgrind = getenv("VALGRIND_TESTS");
const char *target;
size_t target_len;
if (!valgrind || !*valgrind || !strcmp(valgrind, "0")) {
// fallthrough
}
else if (!strcmp(valgrind, "1")) {
char cmd[strlen(argv[0]) + 256];
snprintf(cmd, sizeof(cmd), "VALGRIND_TESTS=\"\" valgrind --error-exitcode=301 --leak-check=yes --show-reachable=yes --track-origins=yes %s", argv[0]);
return system(cmd) != 0;
} else {
char cmd[strlen(valgrind) + strlen(argv[0]) + 32];
snprintf(cmd, sizeof(cmd), "VALGRIND_TESTS="" %s %s", valgrind, argv[0]);
return system(cmd) != 0;
}
if ((target = strrchr(argv[0], SLASH))) {
if (strrchr(target, '/'))
target = strrchr(target, '/');
} else
target = strrchr(argv[0], '/');
target = target ? target + 1 : argv[0];
if (strncmp(target, "lt-", 3) == 0)
target += 3;
target_len = strlen(target);
#ifdef _WIN32
target_len -= 4; // ignore .exe
#endif
{
int rc;
char corporadir[sizeof(SRCDIR) + 1 + target_len + 8];
snprintf(corporadir, sizeof(corporadir), SRCDIR "/%.*s.in", (int) target_len, target);
rc = test_all_from(corporadir);
if (rc)
fprintf(stderr, "Failed to find %s\n", corporadir);
snprintf(corporadir, sizeof(corporadir), SRCDIR "/%.*s.repro", (int) target_len, target);
if (test_all_from(corporadir) && rc)
return 77; // SKIP
}
return 0;
}
#else
#ifndef __AFL_LOOP
static int __AFL_LOOP(int n)
{
static int first = 1;
if (first) {
first = 0;
return n && --n > 0;
}
return 0;
}
#endif
int main(int argc, char **argv)
{
int ret;
unsigned char buf[64 * 1024];
while (__AFL_LOOP(10000)) { // only works with clang - we have to use 1 because static/global vars in wget
ret = fread(buf, 1, sizeof(buf), stdin);
if (ret < 0)
return 0;
LLVMFuzzerTestOneInput(buf, ret);
}
return 0;
}
#endif /* #ifdef TEST_RUN */
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