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/compiler.h>
  12#include <linux/dcache.h>
  13#include <linux/magic.h>
  14#include <linux/types.h>
  15#include "flask.h"
  16
  17#define SECSID_NULL                     0x00000000 /* unspecified SID */
  18#define SECSID_WILD                     0xffffffff /* wildcard SID */
  19#define SECCLASS_NULL                   0x0000 /* no class */
  20
  21/* Identify specific policy version changes */
  22#define POLICYDB_VERSION_BASE           15
  23#define POLICYDB_VERSION_BOOL           16
  24#define POLICYDB_VERSION_IPV6           17
  25#define POLICYDB_VERSION_NLCLASS        18
  26#define POLICYDB_VERSION_VALIDATETRANS  19
  27#define POLICYDB_VERSION_MLS            19
  28#define POLICYDB_VERSION_AVTAB          20
  29#define POLICYDB_VERSION_RANGETRANS     21
  30#define POLICYDB_VERSION_POLCAP         22
  31#define POLICYDB_VERSION_PERMISSIVE     23
  32#define POLICYDB_VERSION_BOUNDARY       24
  33#define POLICYDB_VERSION_FILENAME_TRANS 25
  34#define POLICYDB_VERSION_ROLETRANS      26
  35#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS    27
  36#define POLICYDB_VERSION_DEFAULT_TYPE   28
  37#define POLICYDB_VERSION_CONSTRAINT_NAMES       29
  38
  39/* Range of policy versions we understand*/
  40#define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  41#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  42#define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  43#else
  44#define POLICYDB_VERSION_MAX    POLICYDB_VERSION_CONSTRAINT_NAMES
  45#endif
  46
  47/* Mask for just the mount related flags */
  48#define SE_MNTMASK      0x0f
  49/* Super block security struct flags for mount options */
  50/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
  51#define CONTEXT_MNT     0x01
  52#define FSCONTEXT_MNT   0x02
  53#define ROOTCONTEXT_MNT 0x04
  54#define DEFCONTEXT_MNT  0x08
  55#define SBLABEL_MNT     0x10
  56/* Non-mount related flags */
  57#define SE_SBINITIALIZED        0x0100
  58#define SE_SBPROC               0x0200
  59#define SE_SBGENFS              0x0400
  60
  61#define CONTEXT_STR     "context="
  62#define FSCONTEXT_STR   "fscontext="
  63#define ROOTCONTEXT_STR "rootcontext="
  64#define DEFCONTEXT_STR  "defcontext="
  65#define LABELSUPP_STR "seclabel"
  66
  67struct netlbl_lsm_secattr;
  68
  69extern int selinux_enabled;
  70
  71/* Policy capabilities */
  72enum {
  73        POLICYDB_CAPABILITY_NETPEER,
  74        POLICYDB_CAPABILITY_OPENPERM,
  75        POLICYDB_CAPABILITY_REDHAT1,
  76        POLICYDB_CAPABILITY_ALWAYSNETWORK,
  77        __POLICYDB_CAPABILITY_MAX
  78};
  79#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  80
  81extern int selinux_policycap_netpeer;
  82extern int selinux_policycap_openperm;
  83extern int selinux_policycap_alwaysnetwork;
  84
  85/*
  86 * type_datum properties
  87 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
  88 */
  89#define TYPEDATUM_PROPERTY_PRIMARY      0x0001
  90#define TYPEDATUM_PROPERTY_ATTRIBUTE    0x0002
  91
  92/* limitation of boundary depth  */
  93#define POLICYDB_BOUNDS_MAXDEPTH        4
  94
  95int security_mls_enabled(void);
  96
  97int security_load_policy(void *data, size_t len);
  98int security_read_policy(void **data, size_t *len);
  99size_t security_policydb_len(void);
 100
 101int security_policycap_supported(unsigned int req_cap);
 102
 103#define SEL_VEC_MAX 32
 104struct av_decision {
 105        u32 allowed;
 106        u32 auditallow;
 107        u32 auditdeny;
 108        u32 seqno;
 109        u32 flags;
 110};
 111
 112/* definitions of av_decision.flags */
 113#define AVD_FLAGS_PERMISSIVE    0x0001
 114
 115void security_compute_av(u32 ssid, u32 tsid,
 116                         u16 tclass, struct av_decision *avd);
 117
 118void security_compute_av_user(u32 ssid, u32 tsid,
 119                             u16 tclass, struct av_decision *avd);
 120
 121int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
 122                            const struct qstr *qstr, u32 *out_sid);
 123
 124int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
 125                                 const char *objname, u32 *out_sid);
 126
 127int security_member_sid(u32 ssid, u32 tsid,
 128        u16 tclass, u32 *out_sid);
 129
 130int security_change_sid(u32 ssid, u32 tsid,
 131        u16 tclass, u32 *out_sid);
 132
 133int security_sid_to_context(u32 sid, char **scontext,
 134        u32 *scontext_len);
 135
 136int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 137
 138int security_context_to_sid(const char *scontext, u32 scontext_len,
 139                            u32 *out_sid, gfp_t gfp);
 140
 141int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 142                                    u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 143
 144int security_context_to_sid_force(const char *scontext, u32 scontext_len,
 145                                  u32 *sid);
 146
 147int security_get_user_sids(u32 callsid, char *username,
 148                           u32 **sids, u32 *nel);
 149
 150int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 151
 152int security_netif_sid(char *name, u32 *if_sid);
 153
 154int security_node_sid(u16 domain, void *addr, u32 addrlen,
 155        u32 *out_sid);
 156
 157int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 158                                 u16 tclass);
 159
 160int security_bounded_transition(u32 oldsid, u32 newsid);
 161
 162int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 163
 164int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 165                                 u32 xfrm_sid,
 166                                 u32 *peer_sid);
 167
 168int security_get_classes(char ***classes, int *nclasses);
 169int security_get_permissions(char *class, char ***perms, int *nperms);
 170int security_get_reject_unknown(void);
 171int security_get_allow_unknown(void);
 172
 173#define SECURITY_FS_USE_XATTR           1 /* use xattr */
 174#define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 175#define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 176#define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 177#define SECURITY_FS_USE_NONE            5 /* no labeling support */
 178#define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 179#define SECURITY_FS_USE_NATIVE          7 /* use native label support */
 180#define SECURITY_FS_USE_MAX             7 /* Highest SECURITY_FS_USE_XXX */
 181
 182int security_fs_use(struct super_block *sb);
 183
 184int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 185        u32 *sid);
 186
 187#ifdef CONFIG_NETLABEL
 188int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 189                                   u32 *sid);
 190
 191int security_netlbl_sid_to_secattr(u32 sid,
 192                                   struct netlbl_lsm_secattr *secattr);
 193#else
 194static inline int security_netlbl_secattr_to_sid(
 195                                            struct netlbl_lsm_secattr *secattr,
 196                                            u32 *sid)
 197{
 198        return -EIDRM;
 199}
 200
 201static inline int security_netlbl_sid_to_secattr(u32 sid,
 202                                           struct netlbl_lsm_secattr *secattr)
 203{
 204        return -ENOENT;
 205}
 206#endif /* CONFIG_NETLABEL */
 207
 208const char *security_get_initial_sid_context(u32 sid);
 209
 210/*
 211 * status notifier using mmap interface
 212 */
 213extern struct page *selinux_kernel_status_page(void);
 214
 215#define SELINUX_KERNEL_STATUS_VERSION   1
 216struct selinux_kernel_status {
 217        u32     version;        /* version number of thie structure */
 218        u32     sequence;       /* sequence number of seqlock logic */
 219        u32     enforcing;      /* current setting of enforcing mode */
 220        u32     policyload;     /* times of policy reloaded */
 221        u32     deny_unknown;   /* current setting of deny_unknown */
 222        /*
 223         * The version > 0 supports above members.
 224         */
 225} __packed;
 226
 227extern void selinux_status_update_setenforce(int enforcing);
 228extern void selinux_status_update_policyload(int seqno);
 229extern void selinux_complete_init(void);
 230extern int selinux_disable(void);
 231extern void exit_sel_fs(void);
 232extern struct path selinux_null;
 233extern struct vfsmount *selinuxfs_mount;
 234extern void selnl_notify_setenforce(int val);
 235extern void selnl_notify_policyload(u32 seqno);
 236extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
 237
 238#endif /* _SELINUX_SECURITY_H_ */
 239
 240