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/*
* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif /* HAVE_STDBOOL_H */
#include "sudo_compat.h"
#include "sudo_debug.h"
#include "sudo_eventlog.h"
#include "sudo_fatal.h"
#include "sudo_iolog.h"
#include "sudo_plugin.h"
#include "sudo_util.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
static int
fuzz_conversation(int num_msgs, const struct sudo_conv_message msgs[],
struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
{
int n;
for (n = 0; n < num_msgs; n++) {
const struct sudo_conv_message *msg = &msgs[n];
switch (msg->msg_type & 0xff) {
case SUDO_CONV_PROMPT_ECHO_ON:
case SUDO_CONV_PROMPT_MASK:
case SUDO_CONV_PROMPT_ECHO_OFF:
/* input not supported */
return -1;
case SUDO_CONV_ERROR_MSG:
case SUDO_CONV_INFO_MSG:
/* no output for fuzzers */
break;
default:
return -1;
}
}
return 0;
}
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct iolog_file iolog_file = { true };
struct timing_closure closure;
char logdir[] = "/tmp/timing.XXXXXX";
int dfd = -1, fd = -1;
initprogname("fuzz_iolog_timing");
if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
sudo_warn_set_conversation(fuzz_conversation);
/* I/O logs consist of multiple files in a directory. */
if (mkdtemp(logdir) == NULL)
return 0;
/* Create a timing file from the supplied data. */
dfd = open(logdir, O_RDONLY);
if (dfd == -1)
goto cleanup;
fd = openat(dfd, "timing", O_WRONLY|O_CREAT|O_EXCL, S_IRWXU);
if (fd == -1)
goto cleanup;
if (write(fd, data, size) != (ssize_t)size)
goto cleanup;
close(fd);
fd = -1;
/* Open the timing file we wrote and try to parse it. */
if (!iolog_open(&iolog_file, dfd, IOFD_TIMING, "r"))
goto cleanup;
memset(&closure, 0, sizeof(closure));
closure.decimal = ".";
for (;;) {
if (iolog_read_timing_record(&iolog_file, &closure) != 0)
break;
}
iolog_close(&iolog_file, NULL);
cleanup:
if (dfd != -1) {
if (fd != -1)
close(fd);
unlinkat(dfd, "timing", 0);
close(dfd);
}
rmdir(logdir);
fflush(stdout);
return 0;
}
/* STUB */
bool
iolog_swapids(bool restore)
{
return false;
}
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