include/uapi/linux/if_alg.h

   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 */