/* Copyright 2022 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

*/

#include <config.h>

#include <stdint.h>

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <syslog.h>

#include <fcntl.h>

#include <unistd.h>

#include "src/textfile.h"

char *get_null_terminated(const uint8_t **data, size_t *size) {

#define STR_SIZE 75

  if (*size < STR_SIZE || (int)*size < 0) {

    return NULL;

  }

  char *new_s = malloc(STR_SIZE + 1);

  memcpy(new_s, *data, STR_SIZE);

  new_s[STR_SIZE] = '\0';

  *data = *data+STR_SIZE;

  *size -= STR_SIZE;

  return new_s;

}

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

  uint8_t *data_ptr = data;

  size_t size_val = size;

  char *key1 = get_null_terminated(&data_ptr, &size_val);

  char *val1 = get_null_terminated(&data_ptr, &size_val);

  char *key2 = get_null_terminated(&data_ptr, &size_val);

  if (!key1 || !val1 || !key2) {

    goto cleanup;

  }

  // Create a file with rest of content

  char filename[256];

  sprintf(filename, "/tmp/libfuzzer.%d", getpid());

  FILE *fp = fopen(filename, "wb");

  if (!fp) {

    return 0;

  }

  fwrite(data_ptr, size_val, 1, fp);

  fclose(fp);

  textfile_put(filename, key1, val1);

  textfile_get(filename, key2);

  unlink(filename);

cleanup:

  if (key1 != NULL) {

    free(key1);

    key1 = NULL;

  }

  if (val1 != NULL) {

    free(val1);

    val1 = NULL;

  }

  if (key2 != NULL) {

    free(key2);

    key2 = NULL;

  }

  return 0;

}