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[];
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#define ALG_SET_KEY_BY_KEY_SERIAL	7
56
57/* Operations */
58#define ALG_OP_DECRYPT			0
59#define ALG_OP_ENCRYPT			1
60
61#endif	/* _LINUX_IF_ALG_H */
62