1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linu 1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /* 2 /*
3 * if_alg: User-space algorithm interface 3 * if_alg: User-space algorithm interface
4 * 4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gond 5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
6 * 6 *
7 * This program is free software; you can redi 7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public L 8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of th 9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version. 10 * any later version.
11 * 11 *
12 */ 12 */
13 13
14 #ifndef _LINUX_IF_ALG_H 14 #ifndef _LINUX_IF_ALG_H
15 #define _LINUX_IF_ALG_H 15 #define _LINUX_IF_ALG_H
16 16
17 #include <linux/types.h> 17 #include <linux/types.h>
18 18
19 struct sockaddr_alg { 19 struct sockaddr_alg {
20 __u16 salg_family; 20 __u16 salg_family;
21 __u8 salg_type[14]; 21 __u8 salg_type[14];
22 __u32 salg_feat; 22 __u32 salg_feat;
23 __u32 salg_mask; 23 __u32 salg_mask;
24 __u8 salg_name[64]; 24 __u8 salg_name[64];
25 }; 25 };
26 26
27 /* 27 /*
28 * Linux v4.12 and later removed the 64-byte l 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 29 * arbitrary-length field. We had to keep the original struct above for source
30 * compatibility with existing userspace progr 30 * compatibility with existing userspace programs, though. Use the new struct
31 * below if support for very long algorithm na 31 * below if support for very long algorithm names is needed. To do this,
32 * allocate 'sizeof(struct sockaddr_alg_new) + 32 * allocate 'sizeof(struct sockaddr_alg_new) + strlen(algname) + 1' bytes, and
33 * copy algname (including the null terminator 33 * copy algname (including the null terminator) into salg_name.
34 */ 34 */
35 struct sockaddr_alg_new { 35 struct sockaddr_alg_new {
36 __u16 salg_family; 36 __u16 salg_family;
37 __u8 salg_type[14]; 37 __u8 salg_type[14];
38 __u32 salg_feat; 38 __u32 salg_feat;
39 __u32 salg_mask; 39 __u32 salg_mask;
40 __u8 salg_name[]; 40 __u8 salg_name[];
41 }; 41 };
42 42
43 struct af_alg_iv { 43 struct af_alg_iv {
44 __u32 ivlen; 44 __u32 ivlen;
45 __u8 iv[]; 45 __u8 iv[];
46 }; 46 };
47 47
48 /* Socket options */ 48 /* Socket options */
49 #define ALG_SET_KEY 1 49 #define ALG_SET_KEY 1
50 #define ALG_SET_IV 2 50 #define ALG_SET_IV 2
51 #define ALG_SET_OP 3 51 #define ALG_SET_OP 3
52 #define ALG_SET_AEAD_ASSOCLEN 4 52 #define ALG_SET_AEAD_ASSOCLEN 4
53 #define ALG_SET_AEAD_AUTHSIZE 5 53 #define ALG_SET_AEAD_AUTHSIZE 5
54 #define ALG_SET_DRBG_ENTROPY 6 54 #define ALG_SET_DRBG_ENTROPY 6
55 #define ALG_SET_KEY_BY_KEY_SERIAL 7 55 #define ALG_SET_KEY_BY_KEY_SERIAL 7
56 56
57 /* Operations */ 57 /* Operations */
58 #define ALG_OP_DECRYPT 0 58 #define ALG_OP_DECRYPT 0
59 #define ALG_OP_ENCRYPT 1 59 #define ALG_OP_ENCRYPT 1
60 60
61 #endif /* _LINUX_IF_ALG_H */ 61 #endif /* _LINUX_IF_ALG_H */
62 62
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