cJSON/fuzzing/afl.c

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/*
Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../cJSON.h"
static char *read_file(const char *filename)
{
FILE *file = NULL;
long length = 0;
char *content = NULL;
size_t read_chars = 0;
/* open in read binary mode */
file = fopen(filename, "rb");
if (file == NULL)
{
goto cleanup;
}
/* get the length */
if (fseek(file, 0, SEEK_END) != 0)
{
goto cleanup;
}
length = ftell(file);
if (length < 0)
{
goto cleanup;
}
if (fseek(file, 0, SEEK_SET) != 0)
{
goto cleanup;
}
/* allocate content buffer */
content = (char*)malloc((size_t)length + sizeof('\0'));
if (content == NULL)
{
goto cleanup;
}
/* read the file into memory */
read_chars = fread(content, sizeof(char), (size_t)length, file);
if ((long)read_chars != length)
{
free(content);
content = NULL;
goto cleanup;
}
content[read_chars] = '\0';
cleanup:
if (file != NULL)
{
fclose(file);
}
return content;
}
int main(int argc, char** argv)
{
const char *filename = NULL;
cJSON *item = NULL;
char *json = NULL;
int status;
char *printed_json = NULL;
if ((argc < 2) || (argc > 3))
{
printf("Usage:\n");
printf("%s input_file [enable_printing]\n", argv[0]);
printf("\t input_file: file containing the test data\n");
printf("\t enable_printing: print after parsing, 'yes' or 'no', defaults to 'no'\n");
}
filename = argv[1];
#if __AFL_HAVE_MANUAL_CONTROL
while (__AFL_LOOP(1000))
{
#endif
status = EXIT_SUCCESS;
json = read_file(filename);
if ((json == NULL) || (json[0] == '\0') || (json[1] == '\0'))
{
status = EXIT_FAILURE;
goto cleanup;
}
item = cJSON_Parse(json + 2);
if (item == NULL)
{
goto cleanup;
}
if ((argc == 3) && (strncmp(argv[2], "yes", 3) == 0))
{
int do_format = 0;
if (json[1] == 'f')
{
do_format = 1;
}
if (json[0] == 'b')
{
/* buffered printing */
printed_json = cJSON_PrintBuffered(item, 1, do_format);
}
else
{
/* unbuffered printing */
if (do_format)
{
printed_json = cJSON_Print(item);
}
else
{
printed_json = cJSON_PrintUnformatted(item);
}
}
if (printed_json == NULL)
{
status = EXIT_FAILURE;
goto cleanup;
}
printf("%s\n", printed_json);
}
cleanup:
if (item != NULL)
{
cJSON_Delete(item);
item = NULL;
}
if (json != NULL)
{
free(json);
json = NULL;
}
if (printed_json != NULL)
{
free(printed_json);
printed_json = NULL;
}
#if __AFL_HAVE_MANUAL_CONTROL
}
#endif
return status;
}