/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */

/* tests/fuzzing/fuzz_json.c */

/*

 * Copyright (C) 2024 by Arjun. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * * Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 *

 * * Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in

 *   the documentation and/or other materials provided with the

 *   distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

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 */

/*

 * Fuzzing harness implementation for k5_json_decode.

 */

#include "autoconf.h"

#include <k5-int.h>

#include <krb5.h>

#include <k5-json.h>

#include <string.h>

#define kMinInputLength 2

#define kMaxInputLength 1024

extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);

int

LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    krb5_error_code ret;

    k5_json_value decoded = NULL;

    char *data_in = NULL, *data_out;

    if (size < kMinInputLength || size > kMaxInputLength)

        return 0;

    data_in = k5memdup0(data, size, &ret);

    if (data_in == NULL)

        return 0;

    ret = k5_json_decode(data_in, &decoded);

    if (ret)

        goto cleanup;

    ret = k5_json_encode(decoded, &data_out);

    if (!ret)

        free(data_out);

cleanup:

    free(data_in);

    k5_json_release(decoded);

    return 0;

}