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