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
19 struct 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 */
35 struct 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
43 struct 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
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