fuzz_chpw.c

/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* tests/fuzzing/fuzz_chpw.c */
/*
 * Copyright (C) 2024 by Arjun. All rights reserved.
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/*
 * Fuzzing harness implementation for krb5_chpw_message.
 */

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

#define kMinInputLength 2
#define kMaxInputLength 512

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

int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
    char *msg;
    krb5_data data_in;
    krb5_context context;

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

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

    if (krb5_init_context(&context) != 0)
        return 0;

    if (krb5_chpw_message(context, &data_in, &msg) == 0)
        free(msg);

    krb5_free_context(context);

    return 0;
}