/*

 * Copyright (c) 2018 Yubico AB. All rights reserved.

 * Use of this source code is governed by a BSD-style

 * license that can be found in the LICENSE file.

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include "fido.h"

int

fido_buf_read(const unsigned char **buf, size_t *len, void *dst, size_t count)

{

        if (count > *len)

                return (-1);

        memcpy(dst, *buf, count);

        *buf += count;

        *len -= count;

        return (0);

}

int

fido_buf_write(unsigned char **buf, size_t *len, const void *src, size_t count)

{

        if (count > *len)

                return (-1);

        memcpy(*buf, src, count);

        *buf += count;

        *len -= count;

        return (0);

}