fuzz_ndr.c

/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* tests/fuzzing/fuzz_ndr.c */
/*
 * Copyright (C) 2024 by Arjun. All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
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/*
 * Fuzzing harness implementation for ndr_dec_delegation_info.
 */

#include "autoconf.h"
#include <k5-int.h>
#include <kdc_util.h>

#include <ndr.c>

#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_data data_in, data_out = empty_data();
    struct pac_s4u_delegation_info *di;

    if (size < kMinInputLength || size > kMaxInputLength)
        return 0;

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

    ret = ndr_dec_delegation_info(&data_in, &di);
    if (!ret)
        (void)ndr_enc_delegation_info(di, &data_out);

    ndr_free_delegation_info(di);
    krb5_free_data_contents(NULL, &data_out);

    return 0;
}