include/uapi/linux/lsm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Linux Security Modules (LSM) - User space API
   4  *
   5  * Copyright (C) 2022 Casey Schaufler <casey@schaufler-ca.com>
   6  * Copyright (C) 2022 Intel Corporation
   7  */
   8
   9 #ifndef _UAPI_LINUX_LSM_H
  10 #define _UAPI_LINUX_LSM_H
  11
  12 #include <linux/stddef.h>
  13 #include <linux/types.h>
  14 #include <linux/unistd.h>
  15
  16 /**
  17  * struct lsm_ctx - LSM context information
  18  * @id: the LSM id number, see LSM_ID_XXX
  19  * @flags: LSM specific flags
  20  * @len: length of the lsm_ctx struct, @ctx and any other data or padding
  21  * @ctx_len: the size of @ctx
  22  * @ctx: the LSM context value
  23  *
  24  * The @len field MUST be equal to the size of the lsm_ctx struct
  25  * plus any additional padding and/or data placed after @ctx.
  26  *
  27  * In all cases @ctx_len MUST be equal to the length of @ctx.
  28  * If @ctx is a string value it should be nul terminated with
  29  * @ctx_len equal to `strlen(@ctx) + 1`.  Binary values are
  30  * supported.
  31  *
  32  * The @flags and @ctx fields SHOULD only be interpreted by the
  33  * LSM specified by @id; they MUST be set to zero/0 when not used.
  34  */
  35 struct lsm_ctx {
  36         __u64 id;
  37         __u64 flags;
  38         __u64 len;
  39         __u64 ctx_len;
  40         __u8 ctx[] __counted_by(ctx_len);
  41 };
  42
  43 /*
  44  * ID tokens to identify Linux Security Modules (LSMs)
  45  *
  46  * These token values are used to uniquely identify specific LSMs
  47  * in the kernel as well as in the kernel's LSM userspace API.
  48  *
  49  * A value of zero/0 is considered undefined and should not be used
  50  * outside the kernel. Values 1-99 are reserved for potential
  51  * future use.
  52  */
  53 #define LSM_ID_UNDEF            0
  54 #define LSM_ID_CAPABILITY       100
  55 #define LSM_ID_SELINUX          101
  56 #define LSM_ID_SMACK            102
  57 #define LSM_ID_TOMOYO           103
  58 #define LSM_ID_APPARMOR         104
  59 #define LSM_ID_YAMA             105
  60 #define LSM_ID_LOADPIN          106
  61 #define LSM_ID_SAFESETID        107
  62 #define LSM_ID_LOCKDOWN         108
  63 #define LSM_ID_BPF              109
  64 #define LSM_ID_LANDLOCK         110
  65 #define LSM_ID_IMA              111
  66 #define LSM_ID_EVM              112
  67 #define LSM_ID_IPE              113
  68
  69 /*
  70  * LSM_ATTR_XXX definitions identify different LSM attributes
  71  * which are used in the kernel's LSM userspace API. Support
  72  * for these attributes vary across the different LSMs. None
  73  * are required.
  74  *
  75  * A value of zero/0 is considered undefined and should not be used
  76  * outside the kernel. Values 1-99 are reserved for potential
  77  * future use.
  78  */
  79 #define LSM_ATTR_UNDEF          0
  80 #define LSM_ATTR_CURRENT        100
  81 #define LSM_ATTR_EXEC           101
  82 #define LSM_ATTR_FSCREATE       102
  83 #define LSM_ATTR_KEYCREATE      103
  84 #define LSM_ATTR_PREV           104
  85 #define LSM_ATTR_SOCKCREATE     105
  86
  87 /*
  88  * LSM_FLAG_XXX definitions identify special handling instructions
  89  * for the API.
  90  */
  91 #define LSM_FLAG_SINGLE 0x0001
  92
  93 #endif /* _UAPI_LINUX_LSM_H */