1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * if_alg: User-space algorithm interface
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 */
13
14#ifndef _LINUX_IF_ALG_H
15#define _LINUX_IF_ALG_H
16
17#include <linux/types.h>
18
19struct sockaddr_alg {
20 __u16 salg_family;
21 __u8 salg_type[14];
22 __u32 salg_feat;
23 __u32 salg_mask;
24 __u8 salg_name[64];
25};
26
27/*
28 * Linux v4.12 and later removed the 64-byte limit on salg_name[]; it's now an
29 * arbitrary-length field. We had to keep the original struct above for source
30 * compatibility with existing userspace programs, though. Use the new struct
31 * below if support for very long algorithm names is needed. To do this,
32 * allocate 'sizeof(struct sockaddr_alg_new) + strlen(algname) + 1' bytes, and
33 * copy algname (including the null terminator) into salg_name.
34 */
35struct sockaddr_alg_new {
36 __u16 salg_family;
37 __u8 salg_type[14];
38 __u32 salg_feat;
39 __u32 salg_mask;
40 __u8 salg_name[];
41};
42
43struct af_alg_iv {
44 __u32 ivlen;
45 __u8 iv[0];
46};
47
48/* Socket options */
49#define ALG_SET_KEY 1
50#define ALG_SET_IV 2
51#define ALG_SET_OP 3
52#define ALG_SET_AEAD_ASSOCLEN 4
53#define ALG_SET_AEAD_AUTHSIZE 5
54#define ALG_SET_DRBG_ENTROPY 6
55
56/* Operations */
57#define ALG_OP_DECRYPT 0
58#define ALG_OP_ENCRYPT 1
59
60#endif /* _LINUX_IF_ALG_H */
61

source code of include/linux/if_alg.h