LXR linux/security/selinux/include/security.h

   1/*
   2 * Security server interface.
   3 *
   4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   5 *
   6 */
   7
   8#ifndef _SELINUX_SECURITY_H_
   9#define _SELINUX_SECURITY_H_
  10
  11#include <linux/dcache.h>
  12#include <linux/magic.h>
  13#include <linux/types.h>
  14#include "flask.h"
  15
  16#define SECSID_NULL                     0x00000000 /* unspecified SID */
  17#define SECSID_WILD                     0xffffffff /* wildcard SID */
  18#define SECCLASS_NULL                   0x0000 /* no class */
  19
  20/* Identify specific policy version changes */
  21#define POLICYDB_VERSION_BASE           15
  22#define POLICYDB_VERSION_BOOL           16
  23#define POLICYDB_VERSION_IPV6           17
  24#define POLICYDB_VERSION_NLCLASS        18
  25#define POLICYDB_VERSION_VALIDATETRANS  19
  26#define POLICYDB_VERSION_MLS            19
  27#define POLICYDB_VERSION_AVTAB          20
  28#define POLICYDB_VERSION_RANGETRANS     21
  29#define POLICYDB_VERSION_POLCAP         22
  30#define POLICYDB_VERSION_PERMISSIVE     23
  31#define POLICYDB_VERSION_BOUNDARY       24
  32#define POLICYDB_VERSION_FILENAME_TRANS 25
  33#define POLICYDB_VERSION_ROLETRANS      26
  34#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS    27
  35#define POLICYDB_VERSION_DEFAULT_TYPE   28
  36
  37/* Range of policy versions we understand*/
  38#define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  39#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  40#define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  41#else
  42#define POLICYDB_VERSION_MAX    POLICYDB_VERSION_DEFAULT_TYPE
  43#endif
  44
  45/* Mask for just the mount related flags */
  46#define SE_MNTMASK      0x0f
  47/* Super block security struct flags for mount options */
  48#define CONTEXT_MNT     0x01
  49#define FSCONTEXT_MNT   0x02
  50#define ROOTCONTEXT_MNT 0x04
  51#define DEFCONTEXT_MNT  0x08
  52/* Non-mount related flags */
  53#define SE_SBINITIALIZED        0x10
  54#define SE_SBPROC               0x20
  55#define SE_SBLABELSUPP  0x40
  56
  57#define CONTEXT_STR     "context="
  58#define FSCONTEXT_STR   "fscontext="
  59#define ROOTCONTEXT_STR "rootcontext="
  60#define DEFCONTEXT_STR  "defcontext="
  61#define LABELSUPP_STR "seclabel"
  62
  63struct netlbl_lsm_secattr;
  64
  65extern int selinux_enabled;
  66
  67/* Policy capabilities */
  68enum {
  69        POLICYDB_CAPABILITY_NETPEER,
  70        POLICYDB_CAPABILITY_OPENPERM,
  71        __POLICYDB_CAPABILITY_MAX
  72};
  73#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  74
  75extern int selinux_policycap_netpeer;
  76extern int selinux_policycap_openperm;
  77
  78/*
  79 * type_datum properties
  80 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
  81 */
  82#define TYPEDATUM_PROPERTY_PRIMARY      0x0001
  83#define TYPEDATUM_PROPERTY_ATTRIBUTE    0x0002
  84
  85/* limitation of boundary depth  */
  86#define POLICYDB_BOUNDS_MAXDEPTH        4
  87
  88int security_mls_enabled(void);
  89
  90int security_load_policy(void *data, size_t len);
  91int security_read_policy(void **data, size_t *len);
  92size_t security_policydb_len(void);
  93
  94int security_policycap_supported(unsigned int req_cap);
  95
  96#define SEL_VEC_MAX 32
  97struct av_decision {
  98        u32 allowed;
  99        u32 auditallow;
 100        u32 auditdeny;
 101        u32 seqno;
 102        u32 flags;
 103};
 104
 105/* definitions of av_decision.flags */
 106#define AVD_FLAGS_PERMISSIVE    0x0001
 107
 108void security_compute_av(u32 ssid, u32 tsid,
 109                         u16 tclass, struct av_decision *avd);
 110
 111void security_compute_av_user(u32 ssid, u32 tsid,
 112                             u16 tclass, struct av_decision *avd);
 113
 114int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
 115                            const struct qstr *qstr, u32 *out_sid);
 116
 117int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
 118                                 const char *objname, u32 *out_sid);
 119
 120int security_member_sid(u32 ssid, u32 tsid,
 121        u16 tclass, u32 *out_sid);
 122
 123int security_change_sid(u32 ssid, u32 tsid,
 124        u16 tclass, u32 *out_sid);
 125
 126int security_sid_to_context(u32 sid, char **scontext,
 127        u32 *scontext_len);
 128
 129int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 130
 131int security_context_to_sid(const char *scontext, u32 scontext_len,
 132        u32 *out_sid);
 133
 134int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 135                                    u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 136
 137int security_context_to_sid_force(const char *scontext, u32 scontext_len,
 138                                  u32 *sid);
 139
 140int security_get_user_sids(u32 callsid, char *username,
 141                           u32 **sids, u32 *nel);
 142
 143int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 144
 145int security_netif_sid(char *name, u32 *if_sid);
 146
 147int security_node_sid(u16 domain, void *addr, u32 addrlen,
 148        u32 *out_sid);
 149
 150int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 151                                 u16 tclass);
 152
 153int security_bounded_transition(u32 oldsid, u32 newsid);
 154
 155int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 156
 157int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 158                                 u32 xfrm_sid,
 159                                 u32 *peer_sid);
 160
 161int security_get_classes(char ***classes, int *nclasses);
 162int security_get_permissions(char *class, char ***perms, int *nperms);
 163int security_get_reject_unknown(void);
 164int security_get_allow_unknown(void);
 165
 166#define SECURITY_FS_USE_XATTR           1 /* use xattr */
 167#define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 168#define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 169#define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 170#define SECURITY_FS_USE_NONE            5 /* no labeling support */
 171#define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 172#define SECURITY_FS_USE_NATIVE          7 /* use native label support */
 173#define SECURITY_FS_USE_MAX             7 /* Highest SECURITY_FS_USE_XXX */
 174
 175int security_fs_use(const char *fstype, unsigned int *behavior,
 176        u32 *sid);
 177
 178int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 179        u32 *sid);
 180
 181#ifdef CONFIG_NETLABEL
 182int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 183                                   u32 *sid);
 184
 185int security_netlbl_sid_to_secattr(u32 sid,
 186                                   struct netlbl_lsm_secattr *secattr);
 187#else
 188static inline int security_netlbl_secattr_to_sid(
 189                                            struct netlbl_lsm_secattr *secattr,
 190                                            u32 *sid)
 191{
 192        return -EIDRM;
 193}
 194
 195static inline int security_netlbl_sid_to_secattr(u32 sid,
 196                                           struct netlbl_lsm_secattr *secattr)
 197{
 198        return -ENOENT;
 199}
 200#endif /* CONFIG_NETLABEL */
 201
 202const char *security_get_initial_sid_context(u32 sid);
 203
 204/*
 205 * status notifier using mmap interface
 206 */
 207extern struct page *selinux_kernel_status_page(void);
 208
 209#define SELINUX_KERNEL_STATUS_VERSION   1
 210struct selinux_kernel_status {
 211        u32     version;        /* version number of thie structure */
 212        u32     sequence;       /* sequence number of seqlock logic */
 213        u32     enforcing;      /* current setting of enforcing mode */
 214        u32     policyload;     /* times of policy reloaded */
 215        u32     deny_unknown;   /* current setting of deny_unknown */
 216        /*
 217         * The version > 0 supports above members.
 218         */
 219} __attribute__((packed));
 220
 221extern void selinux_status_update_setenforce(int enforcing);
 222extern void selinux_status_update_policyload(int seqno);
 223extern void selinux_complete_init(void);
 224extern int selinux_disable(void);
 225extern void exit_sel_fs(void);
 226extern struct path selinux_null;
 227extern struct vfsmount *selinuxfs_mount;
 228extern void selnl_notify_setenforce(int val);
 229extern void selnl_notify_policyload(u32 seqno);
 230extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
 231
 232#endif /* _SELINUX_SECURITY_H_ */
 233
 234