1 /*
2 * Copyright (c) 2018 Yubico AB. All rights reserved.
3 * Use of this source code is governed by a BSD-style
4 * license that can be found in the LICENSE file.
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8 #include "fido.h"
9
10 int
fido_buf_read(const unsigned char ** buf,size_t * len,void * dst,size_t count)11 fido_buf_read(const unsigned char **buf, size_t *len, void *dst, size_t count)
12 {
13 if (count > *len)
14 return (-1);
15
16 memcpy(dst, *buf, count);
17 *buf += count;
18 *len -= count;
19
20 return (0);
21 }
22
23 int
fido_buf_write(unsigned char ** buf,size_t * len,const void * src,size_t count)24 fido_buf_write(unsigned char **buf, size_t *len, const void *src, size_t count)
25 {
26 if (count > *len)
27 return (-1);
28
29 memcpy(*buf, src, count);
30 *buf += count;
31 *len -= count;
32
33 return (0);
34 }
35