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

/* tests/fuzzing/fuzz_marshal_cred.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

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

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

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 */

/*

 * Fuzzing harness implementation for k5_unmarshal_cred.

 */

#include "autoconf.h"

#include <cc-int.h>

#define FIRST_VERSION 1

#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;

    krb5_creds cred;

    int version;

    struct k5buf buf;

    if (size < kMinInputLength || size > kMaxInputLength)

        return 0;

    for (version = FIRST_VERSION; version <= 4; version++) {

        ret = k5_unmarshal_cred(data, size, version, &cred);

        if (!ret) {

            k5_buf_init_dynamic(&buf);

            k5_marshal_cred(&buf, version, &cred);

            k5_buf_free(&buf);

        }

        krb5_free_cred_contents(NULL, &cred);

    }

    return 0;

}