/* Copyright (c) 2020, Red Hat, Inc.

 *

 * Authors:  Jakub Jelen <jjelen@redhat.com>

 *

 * This code is licensed under the GNU LGPL, version 2.1 or later.

 * See the COPYING file in the top-level directory.

 */

#include <stdlib.h>

#include <string.h>

#include <libcacard.h>

#include "fuzzer.h"

#include "vcard_emul_type.h"

/* Copied internal structures from vcard_emul_nss.c */

struct VirtualReaderOptionsStruct {

    char *name;

    char *vname;

    VCardEmulType card_type;

    char *type_params;

    char **cert_name;

    int cert_count;

};

struct VCardEmulOptionsStruct {

    char *nss_db;

    struct VirtualReaderOptionsStruct *vreader;

    int vreader_count;

    VCardEmulType hw_card_type;

    char *hw_type_params;

    int use_hw;

};

/* We do not want to fuzz inputs longer than 1024 bytes to avoid need for

 * dynamic reallocation inside of the fuzzer. Anything longer should be

 * possible to express with shorter strings

 */

size_t kMaxInputLength = 1024;

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)

{

    int i, j;

    VCardEmulOptions *options = NULL;

    struct VCardEmulOptionsStruct *my_options = NULL;

    char args[1025];

    if (Size > kMaxInputLength) {

        g_debug("Too long input option");

        return 0;

    }

    memcpy(args, Data, Size);

    args[Size] = '\0';

    options = vcard_emul_options(args);

    if (options == NULL) {

        /* Invalid input -- the function should have cleaned up for itself */

        return 0;

    }

    /* There is no sensible way to free options if they were valid */

    my_options = (struct VCardEmulOptionsStruct *)options;

    for (i = 0; i < my_options->vreader_count; i++) {

        g_free(my_options->vreader[i].name);

        g_free(my_options->vreader[i].vname);

        g_free(my_options->vreader[i].type_params);

        for (j = 0; j < my_options->vreader[i].cert_count; j++) {

            g_free(my_options->vreader[i].cert_name[j]);

        }

        g_free(my_options->vreader[i].cert_name);

    }

    g_free(my_options->vreader);

    g_free(my_options->hw_type_params);

    g_free(my_options->nss_db);

    /* The invalid pointers will be overwritten on next call to parse the options */

    return 0;

}

/* vim: set ts=4 sw=4 tw=0 noet expandtab: */