/* 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 */