1
linux/security/selinux/include/security.h
Paul Moore 7d1464bd11 selinux: fix style issues in security/selinux/include/security.h
As part of on ongoing effort to perform more automated testing and
provide more tools for individual developers to validate their
patches before submitting, we are trying to make our code
"clang-format clean".  My hope is that once we have fixed all of our
style "quirks", developers will be able to run clang-format on their
patches to help avoid silly formatting problems and ensure their
changes fit in well with the rest of the SELinux kernel code.

Signed-off-by: Paul Moore <paul@paul-moore.com>
2023-12-22 18:09:30 -05:00

387 lines
11 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Security server interface.
*
* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*
*/
#ifndef _SELINUX_SECURITY_H_
#define _SELINUX_SECURITY_H_
#include <linux/compiler.h>
#include <linux/dcache.h>
#include <linux/magic.h>
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/refcount.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/printk.h>
#include "flask.h"
#include "policycap.h"
#define SECSID_NULL 0x00000000 /* unspecified SID */
#define SECSID_WILD 0xffffffff /* wildcard SID */
#define SECCLASS_NULL 0x0000 /* no class */
/* Identify specific policy version changes */
#define POLICYDB_VERSION_BASE 15
#define POLICYDB_VERSION_BOOL 16
#define POLICYDB_VERSION_IPV6 17
#define POLICYDB_VERSION_NLCLASS 18
#define POLICYDB_VERSION_VALIDATETRANS 19
#define POLICYDB_VERSION_MLS 19
#define POLICYDB_VERSION_AVTAB 20
#define POLICYDB_VERSION_RANGETRANS 21
#define POLICYDB_VERSION_POLCAP 22
#define POLICYDB_VERSION_PERMISSIVE 23
#define POLICYDB_VERSION_BOUNDARY 24
#define POLICYDB_VERSION_FILENAME_TRANS 25
#define POLICYDB_VERSION_ROLETRANS 26
#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
#define POLICYDB_VERSION_DEFAULT_TYPE 28
#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
#define POLICYDB_VERSION_XPERMS_IOCTL 30
#define POLICYDB_VERSION_INFINIBAND 31
#define POLICYDB_VERSION_GLBLUB 32
#define POLICYDB_VERSION_COMP_FTRANS 33 /* compressed filename transitions */
/* Range of policy versions we understand*/
#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
#define POLICYDB_VERSION_MAX POLICYDB_VERSION_COMP_FTRANS
/* Mask for just the mount related flags */
#define SE_MNTMASK 0x0f
/* Super block security struct flags for mount options */
/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
#define CONTEXT_MNT 0x01
#define FSCONTEXT_MNT 0x02
#define ROOTCONTEXT_MNT 0x04
#define DEFCONTEXT_MNT 0x08
#define SBLABEL_MNT 0x10
/* Non-mount related flags */
#define SE_SBINITIALIZED 0x0100
#define SE_SBPROC 0x0200
#define SE_SBGENFS 0x0400
#define SE_SBGENFS_XATTR 0x0800
#define SE_SBNATIVE 0x1000
#define CONTEXT_STR "context"
#define FSCONTEXT_STR "fscontext"
#define ROOTCONTEXT_STR "rootcontext"
#define DEFCONTEXT_STR "defcontext"
#define SECLABEL_STR "seclabel"
struct netlbl_lsm_secattr;
extern int selinux_enabled_boot;
/*
* type_datum properties
* available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
*/
#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
/* limitation of boundary depth */
#define POLICYDB_BOUNDS_MAXDEPTH 4
struct selinux_policy;
struct selinux_state {
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
bool enforcing;
#endif
bool initialized;
bool policycap[__POLICYDB_CAP_MAX];
struct page *status_page;
struct mutex status_lock;
struct selinux_policy __rcu *policy;
struct mutex policy_mutex;
} __randomize_layout;
void selinux_avc_init(void);
extern struct selinux_state selinux_state;
static inline bool selinux_initialized(void)
{
/* do a synchronized load to avoid race conditions */
return smp_load_acquire(&selinux_state.initialized);
}
static inline void selinux_mark_initialized(void)
{
/* do a synchronized write to avoid race conditions */
smp_store_release(&selinux_state.initialized, true);
}
#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
static inline bool enforcing_enabled(void)
{
return READ_ONCE(selinux_state.enforcing);
}
static inline void enforcing_set(bool value)
{
WRITE_ONCE(selinux_state.enforcing, value);
}
#else
static inline bool enforcing_enabled(void)
{
return true;
}
static inline void enforcing_set(bool value)
{
}
#endif
static inline bool checkreqprot_get(void)
{
/* non-zero/true checkreqprot values are no longer supported */
return 0;
}
static inline bool selinux_policycap_netpeer(void)
{
return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_NETPEER]);
}
static inline bool selinux_policycap_openperm(void)
{
return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_OPENPERM]);
}
static inline bool selinux_policycap_extsockclass(void)
{
return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_EXTSOCKCLASS]);
}
static inline bool selinux_policycap_alwaysnetwork(void)
{
return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_ALWAYSNETWORK]);
}
static inline bool selinux_policycap_cgroupseclabel(void)
{
return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_CGROUPSECLABEL]);
}
static inline bool selinux_policycap_nnp_nosuid_transition(void)
{
return READ_ONCE(
selinux_state.policycap[POLICYDB_CAP_NNP_NOSUID_TRANSITION]);
}
static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
{
return READ_ONCE(
selinux_state.policycap[POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS]);
}
static inline bool selinux_policycap_ioctl_skip_cloexec(void)
{
return READ_ONCE(
selinux_state.policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
}
static inline bool selinux_policycap_userspace_initial_context(void)
{
return READ_ONCE(
selinux_state.policycap[POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT]);
}
struct selinux_policy_convert_data;
struct selinux_load_state {
struct selinux_policy *policy;
struct selinux_policy_convert_data *convert_data;
};
int security_mls_enabled(void);
int security_load_policy(void *data, size_t len,
struct selinux_load_state *load_state);
void selinux_policy_commit(struct selinux_load_state *load_state);
void selinux_policy_cancel(struct selinux_load_state *load_state);
int security_read_policy(void **data, size_t *len);
int security_read_state_kernel(void **data, size_t *len);
int security_policycap_supported(unsigned int req_cap);
#define SEL_VEC_MAX 32
struct av_decision {
u32 allowed;
u32 auditallow;
u32 auditdeny;
u32 seqno;
u32 flags;
};
#define XPERMS_ALLOWED 1
#define XPERMS_AUDITALLOW 2
#define XPERMS_DONTAUDIT 4
#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x)&0x1f))
#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x)&0x1f)))
struct extended_perms_data {
u32 p[8];
};
struct extended_perms_decision {
u8 used;
u8 driver;
struct extended_perms_data *allowed;
struct extended_perms_data *auditallow;
struct extended_perms_data *dontaudit;
};
struct extended_perms {
u16 len; /* length associated decision chain */
struct extended_perms_data drivers; /* flag drivers that are used */
};
/* definitions of av_decision.flags */
#define AVD_FLAGS_PERMISSIVE 0x0001
void security_compute_av(u32 ssid, u32 tsid, u16 tclass,
struct av_decision *avd,
struct extended_perms *xperms);
void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass, u8 driver,
struct extended_perms_decision *xpermd);
void security_compute_av_user(u32 ssid, u32 tsid, u16 tclass,
struct av_decision *avd);
int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
const struct qstr *qstr, u32 *out_sid);
int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
const char *objname, u32 *out_sid);
int security_member_sid(u32 ssid, u32 tsid, u16 tclass, u32 *out_sid);
int security_change_sid(u32 ssid, u32 tsid, u16 tclass, u32 *out_sid);
int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len);
int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
int security_sid_to_context_inval(u32 sid, char **scontext, u32 *scontext_len);
int security_context_to_sid(const char *scontext, u32 scontext_len,
u32 *out_sid, gfp_t gfp);
int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
int security_context_to_sid_default(const char *scontext, u32 scontext_len,
u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
int security_context_to_sid_force(const char *scontext, u32 scontext_len,
u32 *sid);
int security_get_user_sids(u32 callsid, char *username, u32 **sids, u32 *nel);
int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid);
int security_netif_sid(char *name, u32 *if_sid);
int security_node_sid(u16 domain, void *addr, u32 addrlen, u32 *out_sid);
int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
u16 tclass);
int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
u16 tclass);
int security_bounded_transition(u32 oldsid, u32 newsid);
int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, u32 xfrm_sid,
u32 *peer_sid);
int security_get_classes(struct selinux_policy *policy, char ***classes,
u32 *nclasses);
int security_get_permissions(struct selinux_policy *policy, const char *class,
char ***perms, u32 *nperms);
int security_get_reject_unknown(void);
int security_get_allow_unknown(void);
#define SECURITY_FS_USE_XATTR 1 /* use xattr */
#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
#define SECURITY_FS_USE_NONE 5 /* no labeling support */
#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
int security_fs_use(struct super_block *sb);
int security_genfs_sid(const char *fstype, const char *path, u16 sclass,
u32 *sid);
int selinux_policy_genfs_sid(struct selinux_policy *policy, const char *fstype,
const char *path, u16 sclass, u32 *sid);
#ifdef CONFIG_NETLABEL
int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
u32 *sid);
int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr);
#else
static inline int
security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, u32 *sid)
{
return -EIDRM;
}
static inline int
security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
{
return -ENOENT;
}
#endif /* CONFIG_NETLABEL */
const char *security_get_initial_sid_context(u32 sid);
/*
* status notifier using mmap interface
*/
extern struct page *selinux_kernel_status_page(void);
#define SELINUX_KERNEL_STATUS_VERSION 1
struct selinux_kernel_status {
u32 version; /* version number of the structure */
u32 sequence; /* sequence number of seqlock logic */
u32 enforcing; /* current setting of enforcing mode */
u32 policyload; /* times of policy reloaded */
u32 deny_unknown; /* current setting of deny_unknown */
/*
* The version > 0 supports above members.
*/
} __packed;
extern void selinux_status_update_setenforce(bool enforcing);
extern void selinux_status_update_policyload(u32 seqno);
extern void selinux_complete_init(void);
extern struct path selinux_null;
extern void selnl_notify_setenforce(int val);
extern void selnl_notify_policyload(u32 seqno);
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
extern void avtab_cache_init(void);
extern void ebitmap_cache_init(void);
extern void hashtab_cache_init(void);
extern int security_sidtab_hash_stats(char *page);
#endif /* _SELINUX_SECURITY_H_ */