buf.c

/*
 * 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);
}