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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* if_alg: User-space algorithm interface
*
* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _LINUX_IF_ALG_H
#define _LINUX_IF_ALG_H
#include <linux/types.h>
struct sockaddr_alg {
__u16 salg_family;
__u8 salg_type[14];
__u32 salg_feat;
__u32 salg_mask;
__u8 salg_name[64];
};
/*
* Linux v4.12 and later removed the 64-byte limit on salg_name[]; it's now an
* arbitrary-length field. We had to keep the original struct above for source
* compatibility with existing userspace programs, though. Use the new struct
* below if support for very long algorithm names is needed. To do this,
* allocate 'sizeof(struct sockaddr_alg_new) + strlen(algname) + 1' bytes, and
* copy algname (including the null terminator) into salg_name.
*/
struct sockaddr_alg_new {
__u16 salg_family;
__u8 salg_type[14];
__u32 salg_feat;
__u32 salg_mask;
__u8 salg_name[];
};
struct af_alg_iv {
__u32 ivlen;
__u8 iv[0];
};
/* Socket options */
#define ALG_SET_KEY 1
#define ALG_SET_IV 2
#define ALG_SET_OP 3
#define ALG_SET_AEAD_ASSOCLEN 4
#define ALG_SET_AEAD_AUTHSIZE 5
#define ALG_SET_DRBG_ENTROPY 6
/* Operations */
#define ALG_OP_DECRYPT 0
#define ALG_OP_ENCRYPT 1
#endif /* _LINUX_IF_ALG_H */