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