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Diffstat (limited to 'kernel/security/selinux/include/security.h')
| -rw-r--r-- | kernel/security/selinux/include/security.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/kernel/security/selinux/include/security.h b/kernel/security/selinux/include/security.h new file mode 100644 index 000000000..d1e0b239b --- /dev/null +++ b/kernel/security/selinux/include/security.h @@ -0,0 +1,238 @@ +/* + * Security server interface. + * + * Author : Stephen Smalley, <sds@epoch.ncsc.mil> + * + */ + +#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 "flask.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 + +/* Range of policy versions we understand*/ +#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE +#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX +#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE +#else +#define POLICYDB_VERSION_MAX POLICYDB_VERSION_CONSTRAINT_NAMES +#endif + +/* 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 CONTEXT_STR "context=" +#define FSCONTEXT_STR "fscontext=" +#define ROOTCONTEXT_STR "rootcontext=" +#define DEFCONTEXT_STR "defcontext=" +#define LABELSUPP_STR "seclabel" + +struct netlbl_lsm_secattr; + +extern int selinux_enabled; + +/* Policy capabilities */ +enum { + POLICYDB_CAPABILITY_NETPEER, + POLICYDB_CAPABILITY_OPENPERM, + POLICYDB_CAPABILITY_REDHAT1, + POLICYDB_CAPABILITY_ALWAYSNETWORK, + __POLICYDB_CAPABILITY_MAX +}; +#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) + +extern int selinux_policycap_netpeer; +extern int selinux_policycap_openperm; +extern int selinux_policycap_alwaysnetwork; + +/* + * 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 + +int security_mls_enabled(void); + +int security_load_policy(void *data, size_t len); +int security_read_policy(void **data, size_t *len); +size_t security_policydb_len(void); + +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; +}; + +/* definitions of av_decision.flags */ +#define AVD_FLAGS_PERMISSIVE 0x0001 + +void security_compute_av(u32 ssid, u32 tsid, + u16 tclass, struct av_decision *avd); + +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_context_to_sid(const char *scontext, u32 scontext_len, + 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_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_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(char ***classes, int *nclasses); +int security_get_permissions(char *class, char ***perms, int *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, char *name, 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 thie 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(int enforcing); +extern void selinux_status_update_policyload(int seqno); +extern void selinux_complete_init(void); +extern int selinux_disable(void); +extern void exit_sel_fs(void); +extern struct path selinux_null; +extern struct vfsmount *selinuxfs_mount; +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); + +#endif /* _SELINUX_SECURITY_H_ */ + |