// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * cryptsetup VERITY, INTEGRITY fuzz target

 */

extern "C" {

#define FILESIZE (16777216)

#include "src/cryptsetup.h"

#include <err.h>

#include "verity/verity.h"

#include "integrity/integrity.h"

#include "crypto_backend/crypto_backend.h"

#include "FuzzerInterface.h"

static void empty_log(int level, const char *msg, void *usrptr) {}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  int fd, r;

  struct crypt_device *cd = NULL;

  char name[] = "/tmp/test-script-fuzz.XXXXXX";

  fd = mkostemp(name, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC);

  if (fd == -1)

    err(EXIT_FAILURE, "mkostemp() failed");

  /* enlarge header */

  if (ftruncate(fd, FILESIZE) == -1)

    goto out;

  if (write_buffer(fd, data, size) != (ssize_t) size)

    goto out;

  crypt_set_log_callback(NULL, empty_log, NULL);

  if (crypt_init(&cd, name) == 0) {

    r = crypt_load(cd, CRYPT_VERITY, NULL);

    if (r == 0)

      goto out;

    (void) crypt_load(cd, CRYPT_INTEGRITY, NULL);

  }

out:

  crypt_free(cd);

  close(fd);

  unlink(name);

  return 0;

}

}