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