summaryrefslogtreecommitdiffstats
path: root/security/selinux/include/security.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--security/selinux/include/security.h467
1 files changed, 467 insertions, 0 deletions
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
new file mode 100644
index 000000000..393aff41d
--- /dev/null
+++ b/security/selinux/include/security.h
@@ -0,0 +1,467 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Security server interface.
+ *
+ * Author : Stephen Smalley, <sds@tycho.nsa.gov>
+ *
+ */
+
+#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 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_avc;
+struct selinux_policy;
+
+struct selinux_state {
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+ bool disabled;
+#endif
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+ bool enforcing;
+#endif
+ bool checkreqprot;
+ bool initialized;
+ bool policycap[__POLICYDB_CAP_MAX];
+
+ struct page *status_page;
+ struct mutex status_lock;
+
+ struct selinux_avc *avc;
+ struct selinux_policy __rcu *policy;
+ struct mutex policy_mutex;
+} __randomize_layout;
+
+void selinux_avc_init(struct selinux_avc **avc);
+
+extern struct selinux_state selinux_state;
+
+static inline bool selinux_initialized(const struct selinux_state *state)
+{
+ /* do a synchronized load to avoid race conditions */
+ return smp_load_acquire(&state->initialized);
+}
+
+static inline void selinux_mark_initialized(struct selinux_state *state)
+{
+ /* do a synchronized write to avoid race conditions */
+ smp_store_release(&state->initialized, true);
+}
+
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+static inline bool enforcing_enabled(struct selinux_state *state)
+{
+ return READ_ONCE(state->enforcing);
+}
+
+static inline void enforcing_set(struct selinux_state *state, bool value)
+{
+ WRITE_ONCE(state->enforcing, value);
+}
+#else
+static inline bool enforcing_enabled(struct selinux_state *state)
+{
+ return true;
+}
+
+static inline void enforcing_set(struct selinux_state *state, bool value)
+{
+}
+#endif
+
+static inline bool checkreqprot_get(const struct selinux_state *state)
+{
+ return READ_ONCE(state->checkreqprot);
+}
+
+static inline void checkreqprot_set(struct selinux_state *state, bool value)
+{
+ if (value)
+ pr_err("SELinux: https://github.com/SELinuxProject/selinux-kernel/wiki/DEPRECATE-checkreqprot\n");
+ WRITE_ONCE(state->checkreqprot, value);
+}
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+static inline bool selinux_disabled(struct selinux_state *state)
+{
+ return READ_ONCE(state->disabled);
+}
+
+static inline void selinux_mark_disabled(struct selinux_state *state)
+{
+ WRITE_ONCE(state->disabled, true);
+}
+#else
+static inline bool selinux_disabled(struct selinux_state *state)
+{
+ return false;
+}
+#endif
+
+static inline bool selinux_policycap_netpeer(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_NETPEER]);
+}
+
+static inline bool selinux_policycap_openperm(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_OPENPERM]);
+}
+
+static inline bool selinux_policycap_extsockclass(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_EXTSOCKCLASS]);
+}
+
+static inline bool selinux_policycap_alwaysnetwork(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_ALWAYSNETWORK]);
+}
+
+static inline bool selinux_policycap_cgroupseclabel(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_CGROUPSECLABEL]);
+}
+
+static inline bool selinux_policycap_nnp_nosuid_transition(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_NNP_NOSUID_TRANSITION]);
+}
+
+static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS]);
+}
+
+static inline bool selinux_policycap_ioctl_skip_cloexec(void)
+{
+ struct selinux_state *state = &selinux_state;
+
+ return READ_ONCE(state->policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
+}
+
+struct selinux_policy_convert_data;
+
+struct selinux_load_state {
+ struct selinux_policy *policy;
+ struct selinux_policy_convert_data *convert_data;
+};
+
+int security_mls_enabled(struct selinux_state *state);
+int security_load_policy(struct selinux_state *state,
+ void *data, size_t len,
+ struct selinux_load_state *load_state);
+void selinux_policy_commit(struct selinux_state *state,
+ struct selinux_load_state *load_state);
+void selinux_policy_cancel(struct selinux_state *state,
+ struct selinux_load_state *load_state);
+int security_read_policy(struct selinux_state *state,
+ void **data, size_t *len);
+int security_read_state_kernel(struct selinux_state *state,
+ void **data, size_t *len);
+int security_policycap_supported(struct selinux_state *state,
+ 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(struct selinux_state *state,
+ u32 ssid, u32 tsid,
+ u16 tclass, struct av_decision *avd,
+ struct extended_perms *xperms);
+
+void security_compute_xperms_decision(struct selinux_state *state,
+ u32 ssid, u32 tsid, u16 tclass,
+ u8 driver,
+ struct extended_perms_decision *xpermd);
+
+void security_compute_av_user(struct selinux_state *state,
+ u32 ssid, u32 tsid,
+ u16 tclass, struct av_decision *avd);
+
+int security_transition_sid(struct selinux_state *state,
+ u32 ssid, u32 tsid, u16 tclass,
+ const struct qstr *qstr, u32 *out_sid);
+
+int security_transition_sid_user(struct selinux_state *state,
+ u32 ssid, u32 tsid, u16 tclass,
+ const char *objname, u32 *out_sid);
+
+int security_member_sid(struct selinux_state *state, u32 ssid, u32 tsid,
+ u16 tclass, u32 *out_sid);
+
+int security_change_sid(struct selinux_state *state, u32 ssid, u32 tsid,
+ u16 tclass, u32 *out_sid);
+
+int security_sid_to_context(struct selinux_state *state, u32 sid,
+ char **scontext, u32 *scontext_len);
+
+int security_sid_to_context_force(struct selinux_state *state,
+ u32 sid, char **scontext, u32 *scontext_len);
+
+int security_sid_to_context_inval(struct selinux_state *state,
+ u32 sid, char **scontext, u32 *scontext_len);
+
+int security_context_to_sid(struct selinux_state *state,
+ const char *scontext, u32 scontext_len,
+ u32 *out_sid, gfp_t gfp);
+
+int security_context_str_to_sid(struct selinux_state *state,
+ const char *scontext, u32 *out_sid, gfp_t gfp);
+
+int security_context_to_sid_default(struct selinux_state *state,
+ const char *scontext, u32 scontext_len,
+ u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
+
+int security_context_to_sid_force(struct selinux_state *state,
+ const char *scontext, u32 scontext_len,
+ u32 *sid);
+
+int security_get_user_sids(struct selinux_state *state,
+ u32 callsid, char *username,
+ u32 **sids, u32 *nel);
+
+int security_port_sid(struct selinux_state *state,
+ u8 protocol, u16 port, u32 *out_sid);
+
+int security_ib_pkey_sid(struct selinux_state *state,
+ u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
+
+int security_ib_endport_sid(struct selinux_state *state,
+ const char *dev_name, u8 port_num, u32 *out_sid);
+
+int security_netif_sid(struct selinux_state *state,
+ char *name, u32 *if_sid);
+
+int security_node_sid(struct selinux_state *state,
+ u16 domain, void *addr, u32 addrlen,
+ u32 *out_sid);
+
+int security_validate_transition(struct selinux_state *state,
+ u32 oldsid, u32 newsid, u32 tasksid,
+ u16 tclass);
+
+int security_validate_transition_user(struct selinux_state *state,
+ u32 oldsid, u32 newsid, u32 tasksid,
+ u16 tclass);
+
+int security_bounded_transition(struct selinux_state *state,
+ u32 oldsid, u32 newsid);
+
+int security_sid_mls_copy(struct selinux_state *state,
+ u32 sid, u32 mls_sid, u32 *new_sid);
+
+int security_net_peersid_resolve(struct selinux_state *state,
+ u32 nlbl_sid, u32 nlbl_type,
+ u32 xfrm_sid,
+ u32 *peer_sid);
+
+int security_get_classes(struct selinux_policy *policy,
+ char ***classes, int *nclasses);
+int security_get_permissions(struct selinux_policy *policy,
+ char *class, char ***perms, int *nperms);
+int security_get_reject_unknown(struct selinux_state *state);
+int security_get_allow_unknown(struct selinux_state *state);
+
+#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 selinux_state *state, struct super_block *sb);
+
+int security_genfs_sid(struct selinux_state *state,
+ 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 selinux_state *state,
+ struct netlbl_lsm_secattr *secattr,
+ u32 *sid);
+
+int security_netlbl_sid_to_secattr(struct selinux_state *state,
+ u32 sid,
+ struct netlbl_lsm_secattr *secattr);
+#else
+static inline int security_netlbl_secattr_to_sid(struct selinux_state *state,
+ struct netlbl_lsm_secattr *secattr,
+ u32 *sid)
+{
+ return -EIDRM;
+}
+
+static inline int security_netlbl_sid_to_secattr(struct selinux_state *state,
+ 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(struct selinux_state *state);
+
+#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(struct selinux_state *state,
+ int enforcing);
+extern void selinux_status_update_policyload(struct selinux_state *state,
+ int seqno);
+extern void selinux_complete_init(void);
+extern int selinux_disable(struct selinux_state *state);
+extern void exit_sel_fs(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(struct selinux_state *state, char *page);
+
+#endif /* _SELINUX_SECURITY_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 19:34:45 +0000