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

/* tests/fuzzing/fuzz_krad.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 krad_packet_decode_response,

 * krad_packet_decode_request.

 */

#include "autoconf.h"

#include <k5-int.h>

#include <krad.h>

#define kMinInputLength 2

#define kMaxInputLength 1024

static krad_packet *packets[3];

static const krad_packet *

iterator(void *data, krb5_boolean cancel)

{

    krad_packet *tmp;

    int *i = data;

    if (cancel || packets[*i] == NULL)

        return NULL;

    tmp = packets[*i];

    *i += 1;

    return tmp;

}

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

int

LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    int i;

    krb5_context ctx;

    krb5_data data_in;

    const char *secret = "f";

    const krad_packet *req_1 = NULL, *req_2 = NULL;

    krad_packet *rsp_1 = NULL, *rsp_2 = NULL;

    if (size < kMinInputLength || size > kMaxInputLength)

        return 0;

    if (krb5_init_context(&ctx) != 0)

        return 0;

    data_in = make_data((void *)data, size);

    i = 0;

    krad_packet_decode_response(ctx, secret, &data_in, iterator, &i,

                                &req_1, &rsp_1);

    i = 0;

    krad_packet_decode_request(ctx, secret, &data_in, iterator, &i,

                               &req_2, &rsp_2);

    krad_packet_free(rsp_1);

    krad_packet_free(rsp_2);

    krb5_free_context(ctx);

    return 0;

}