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33 * This include file contains function prototypes and type definitions used
34 * within the audit implementation.
37 #ifndef _SECURITY_AUDIT_PRIVATE_H_
38 #define _SECURITY_AUDIT_PRIVATE_H_
41 #error "no user-serviceable parts inside"
45 #include <sys/socket.h>
46 #include <sys/ucred.h>
49 MALLOC_DECLARE(M_AUDITBSM);
50 MALLOC_DECLARE(M_AUDITDATA);
51 MALLOC_DECLARE(M_AUDITPATH);
52 MALLOC_DECLARE(M_AUDITTEXT);
56 * Audit control variables that are usually set/read via system calls and
57 * used to control various aspects of auditing.
59 extern struct au_qctrl audit_qctrl;
60 extern struct audit_fstat audit_fstat;
61 extern struct au_mask audit_nae_mask;
62 extern int audit_panic_on_write_fail;
63 extern int audit_fail_stop;
64 extern int audit_argv;
65 extern int audit_arge;
68 * Success/failure conditions for the conversion of a kernel audit record to
76 * Defines for the kernel audit record k_ar_commit field. Flags are set to
77 * indicate what sort of record it is, and which preselection mechanism
80 #define AR_COMMIT_KERNEL 0x00000001U
81 #define AR_COMMIT_USER 0x00000010U
83 #define AR_PRESELECT_TRAIL 0x00001000U
84 #define AR_PRESELECT_PIPE 0x00002000U
86 #define AR_PRESELECT_USER_TRAIL 0x00004000U
87 #define AR_PRESELECT_USER_PIPE 0x00008000U
90 * Audit data is generated as a stream of struct audit_record structures,
91 * linked by struct kaudit_record, and contain storage for possible audit so
92 * that it will not need to be allocated during the processing of a system
93 * call, both improving efficiency and avoiding sleeping at untimely moments.
94 * This structure is converted to BSM format before being written to disk.
96 struct vnode_au_info {
107 gid_t gidset[NGROUPS];
111 struct socket_au_info {
115 in_addr_t so_raddr; /* Remote address if INET socket. */
116 in_addr_t so_laddr; /* Local address if INET socket. */
117 u_short so_rport; /* Remote port. */
118 u_short so_lport; /* Local port. */
121 union auditon_udata {
127 au_evclass_map_t au_evclass;
129 auditinfo_t au_auinfo;
130 auditpinfo_t au_aupinfo;
131 auditpinfo_addr_t au_aupinfo_addr;
137 struct posix_ipc_perm {
143 struct audit_record {
144 /* Audit record header. */
147 int ar_retval; /* value returned to the process */
148 int ar_errno; /* return status of system call */
149 struct timespec ar_starttime;
150 struct timespec ar_endtime;
151 u_int64_t ar_valid_arg; /* Bitmask of valid arguments */
153 /* Audit subject information. */
154 struct xucred ar_subj_cred;
158 uid_t ar_subj_auid; /* Audit user ID */
159 pid_t ar_subj_asid; /* Audit session ID */
161 struct au_tid ar_subj_term;
162 struct au_tid_addr ar_subj_term_addr;
163 struct au_mask ar_subj_amask;
165 /* Operation arguments. */
174 struct au_tid ar_arg_termid;
175 struct au_tid_addr ar_arg_termid_addr;
179 struct groupset ar_arg_groups;
189 char ar_arg_login[MAXLOGNAME];
190 int ar_arg_ctlname[CTL_MAXNAME];
191 struct socket_au_info ar_arg_sockinfo;
195 struct au_mask ar_arg_amask;
196 struct vnode_au_info ar_arg_vnode1;
197 struct vnode_au_info ar_arg_vnode2;
199 int ar_arg_svipc_cmd;
200 struct ipc_perm ar_arg_svipc_perm;
202 void * ar_arg_svipc_addr;
203 struct posix_ipc_perm ar_arg_pipc_perm;
204 union auditon_udata ar_arg_auditon;
209 int ar_arg_exitstatus;
210 int ar_arg_exitretval;
211 struct sockaddr_storage ar_arg_sockaddr;
215 * Arguments in the audit record are initially not defined; flags are set to
216 * indicate if they are present so they can be included in the audit log
217 * stream only if defined.
219 #define ARG_IS_VALID(kar, arg) ((kar)->k_ar.ar_valid_arg & (arg))
220 #define ARG_SET_VALID(kar, arg) do { \
221 (kar)->k_ar.ar_valid_arg |= (arg); \
225 * In-kernel version of audit record; the basic record plus queue meta-data.
226 * This record can also have a pointer set to some opaque data that will be
227 * passed through to the audit writing mechanism.
229 struct kaudit_record {
230 struct audit_record k_ar;
231 u_int32_t k_ar_commit;
232 void *k_udata; /* User data. */
233 u_int k_ulen; /* User data length. */
234 struct uthread *k_uthread; /* Audited thread. */
235 TAILQ_ENTRY(kaudit_record) k_q;
237 TAILQ_HEAD(kaudit_queue, kaudit_record);
240 * Functions to manage the allocation, release, and commit of kernel audit
243 void audit_abort(struct kaudit_record *ar);
244 void audit_commit(struct kaudit_record *ar, int error,
246 struct kaudit_record *audit_new(int event, struct thread *td);
249 * Functions relating to the conversion of internal kernel audit records to
250 * the BSM file format.
253 int kaudit_to_bsm(struct kaudit_record *kar, struct au_record **pau);
254 int bsm_rec_verify(void *rec);
257 * Kernel versions of the libbsm audit record functions.
259 void kau_free(struct au_record *rec);
263 * Return values for pre-selection and post-selection decisions.
265 #define AU_PRS_SUCCESS 1
266 #define AU_PRS_FAILURE 2
267 #define AU_PRS_BOTH (AU_PRS_SUCCESS|AU_PRS_FAILURE)
270 * Data structures relating to the kernel audit queue. Ideally, these might
271 * be abstracted so that only accessor methods are exposed.
273 extern struct mtx audit_mtx;
274 extern struct cv audit_watermark_cv;
275 extern struct cv audit_worker_cv;
276 extern struct kaudit_queue audit_q;
277 extern size_t audit_q_len;
278 extern size_t audit_pre_q_len;
279 extern int audit_in_failure;
282 * Flags to use on audit files when opening and closing.
284 #define AUDIT_OPEN_FLAGS (FWRITE | O_APPEND)
285 #define AUDIT_CLOSE_FLAGS (FWRITE | O_APPEND)
287 #include <sys/fcntl.h>
288 #include <sys/kernel.h>
289 #include <sys/malloc.h>
292 * Some of the BSM tokenizer functions take different parameters in the
293 * kernel implementations in order to save the copying of large kernel data
294 * structures. The prototypes of these functions are declared here.
296 token_t *kau_to_socket(struct socket_au_info *soi);
299 * audit_klib prototypes
301 int au_preselect(au_event_t event, au_class_t class,
302 au_mask_t *mask_p, int sorf);
303 void au_evclassmap_init(void);
304 void au_evclassmap_insert(au_event_t event, au_class_t class);
305 au_class_t au_event_class(au_event_t event);
306 au_event_t audit_ctlname_to_sysctlevent(int name[], uint64_t valid_arg);
307 au_event_t audit_flags_and_error_to_openevent(int oflags, int error);
308 au_event_t audit_msgctl_to_event(int cmd);
309 au_event_t audit_semctl_to_event(int cmr);
310 void audit_canon_path(struct thread *td, char *path, char *cpath);
311 au_event_t auditon_command_event(int cmd);
314 * Audit trigger events notify user space of kernel audit conditions
317 void audit_trigger_init(void);
318 int audit_send_trigger(unsigned int trigger);
321 * General audit related functions.
323 struct kaudit_record *currecord(void);
324 void audit_free(struct kaudit_record *ar);
325 void audit_shutdown(void *arg, int howto);
326 void audit_rotate_vnode(struct ucred *cred,
328 void audit_worker_init(void);
331 * Audit pipe functions.
333 int audit_pipe_preselect(au_id_t auid, au_event_t event,
334 au_class_t class, int sorf, int trail_select);
335 void audit_pipe_submit(au_id_t auid, au_event_t event, au_class_t class,
336 int sorf, int trail_select, void *record, u_int record_len);
337 void audit_pipe_submit_user(void *record, u_int record_len);
339 #endif /* ! _SECURITY_AUDIT_PRIVATE_H_ */