1 /*
2 * Copyright (c) 1999-2005 Apple Computer, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32 /*
33 * This header includes function prototypes and type definitions that are
34 * necessary for the kernel as a whole to interact with the audit subsystem.
35 */
36
37 #ifndef _SECURITY_AUDIT_KERNEL_H_
38 #define _SEUCRITY_AUDIT_KERNEL_H_
39
40 #ifndef _KERNEL
41 #error "no user-serviceable parts inside"
42 #endif
43
44 #include <bsm/audit.h>
45
46 #include <sys/file.h>
47 #include <sys/sysctl.h>
48
49 /*
50 * Audit subsystem condition flags. The audit_enabled flag is set and
51 * removed automatically as a result of configuring log files, and can be
52 * observed but should not be directly manipulated. The audit suspension
53 * flag permits audit to be temporarily disabled without reconfiguring the
54 * audit target.
55 */
56 extern int audit_enabled;
57 extern int audit_suspended;
58
59 /*
60 * Define the masks for the audited arguments.
61 *
62 * XXXRW: These need to remain in audit.h for now because our vnode and name
63 * lookup audit calls rely on passing in flags to indicate which name or
64 * vnode is being logged. These should move to audit_private.h when that is
65 * fixed.
66 */
67 #define ARG_EUID 0x0000000000000001ULL
68 #define ARG_RUID 0x0000000000000002ULL
69 #define ARG_SUID 0x0000000000000004ULL
70 #define ARG_EGID 0x0000000000000008ULL
71 #define ARG_RGID 0x0000000000000010ULL
72 #define ARG_SGID 0x0000000000000020ULL
73 #define ARG_PID 0x0000000000000040ULL
74 #define ARG_UID 0x0000000000000080ULL
75 #define ARG_AUID 0x0000000000000100ULL
76 #define ARG_GID 0x0000000000000200ULL
77 #define ARG_FD 0x0000000000000400ULL
78 #define ARG_POSIX_IPC_PERM 0x0000000000000800ULL
79 #define ARG_FFLAGS 0x0000000000001000ULL
80 #define ARG_MODE 0x0000000000002000ULL
81 #define ARG_DEV 0x0000000000004000ULL
82 #define ARG_ADDR 0x0000000000008000ULL
83 #define ARG_LEN 0x0000000000010000ULL
84 #define ARG_MASK 0x0000000000020000ULL
85 #define ARG_SIGNUM 0x0000000000040000ULL
86 #define ARG_LOGIN 0x0000000000080000ULL
87 #define ARG_SADDRINET 0x0000000000100000ULL
88 #define ARG_SADDRINET6 0x0000000000200000ULL
89 #define ARG_SADDRUNIX 0x0000000000400000ULL
90 #define ARG_TERMID_ADDR 0x0000000000400000ULL
91 #define ARG_UNUSED2 0x0000000001000000ULL
92 #define ARG_UPATH1 0x0000000002000000ULL
93 #define ARG_UPATH2 0x0000000004000000ULL
94 #define ARG_TEXT 0x0000000008000000ULL
95 #define ARG_VNODE1 0x0000000010000000ULL
96 #define ARG_VNODE2 0x0000000020000000ULL
97 #define ARG_SVIPC_CMD 0x0000000040000000ULL
98 #define ARG_SVIPC_PERM 0x0000000080000000ULL
99 #define ARG_SVIPC_ID 0x0000000100000000ULL
100 #define ARG_SVIPC_ADDR 0x0000000200000000ULL
101 #define ARG_GROUPSET 0x0000000400000000ULL
102 #define ARG_CMD 0x0000000800000000ULL
103 #define ARG_SOCKINFO 0x0000001000000000ULL
104 #define ARG_ASID 0x0000002000000000ULL
105 #define ARG_TERMID 0x0000004000000000ULL
106 #define ARG_AUDITON 0x0000008000000000ULL
107 #define ARG_VALUE 0x0000010000000000ULL
108 #define ARG_AMASK 0x0000020000000000ULL
109 #define ARG_CTLNAME 0x0000040000000000ULL
110 #define ARG_PROCESS 0x0000080000000000ULL
111 #define ARG_MACHPORT1 0x0000100000000000ULL
112 #define ARG_MACHPORT2 0x0000200000000000ULL
113 #define ARG_EXIT 0x0000400000000000ULL
114 #define ARG_IOVECSTR 0x0000800000000000ULL
115 #define ARG_ARGV 0x0001000000000000ULL
116 #define ARG_ENVV 0x0002000000000000ULL
117 #define ARG_NONE 0x0000000000000000ULL
118 #define ARG_ALL 0xFFFFFFFFFFFFFFFFULL
119
120 void audit_syscall_enter(unsigned short code, struct thread *td);
121 void audit_syscall_exit(int error, struct thread *td);
122
123 /*
124 * The remaining kernel functions are conditionally compiled in as they are
125 * wrapped by a macro, and the macro should be the only place in the source
126 * tree where these functions are referenced.
127 */
128 #ifdef AUDIT
129 struct ipc_perm;
130 struct sockaddr;
131 union auditon_udata;
132 void audit_arg_addr(void * addr);
133 void audit_arg_exit(int status, int retval);
134 void audit_arg_len(int len);
135 void audit_arg_fd(int fd);
136 void audit_arg_fflags(int fflags);
137 void audit_arg_gid(gid_t gid);
138 void audit_arg_uid(uid_t uid);
139 void audit_arg_egid(gid_t egid);
140 void audit_arg_euid(uid_t euid);
141 void audit_arg_rgid(gid_t rgid);
142 void audit_arg_ruid(uid_t ruid);
143 void audit_arg_sgid(gid_t sgid);
144 void audit_arg_suid(uid_t suid);
145 void audit_arg_groupset(gid_t *gidset, u_int gidset_size);
146 void audit_arg_login(char *login);
147 void audit_arg_ctlname(int *name, int namelen);
148 void audit_arg_mask(int mask);
149 void audit_arg_mode(mode_t mode);
150 void audit_arg_dev(int dev);
151 void audit_arg_value(long value);
152 void audit_arg_owner(uid_t uid, gid_t gid);
153 void audit_arg_pid(pid_t pid);
154 void audit_arg_process(struct proc *p);
155 void audit_arg_signum(u_int signum);
156 void audit_arg_socket(int sodomain, int sotype, int soprotocol);
157 void audit_arg_sockaddr(struct thread *td, struct sockaddr *sa);
158 void audit_arg_auid(uid_t auid);
159 void audit_arg_auditinfo(struct auditinfo *au_info);
160 void audit_arg_auditinfo_addr(struct auditinfo_addr *au_info);
161 void audit_arg_upath(struct thread *td, char *upath, u_int64_t flags);
162 void audit_arg_vnode(struct vnode *vp, u_int64_t flags);
163 void audit_arg_text(char *text);
164 void audit_arg_cmd(int cmd);
165 void audit_arg_svipc_cmd(int cmd);
166 void audit_arg_svipc_perm(struct ipc_perm *perm);
167 void audit_arg_svipc_id(int id);
168 void audit_arg_svipc_addr(void *addr);
169 void audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode);
170 void audit_arg_auditon(union auditon_udata *udata);
171 void audit_arg_file(struct proc *p, struct file *fp);
172 void audit_arg_argv(char *argv, int argc, int length);
173 void audit_arg_envv(char *envv, int envc, int length);
174 void audit_sysclose(struct thread *td, int fd);
175 void audit_cred_copy(struct ucred *src, struct ucred *dest);
176 void audit_cred_destroy(struct ucred *cred);
177 void audit_cred_init(struct ucred *cred);
178 void audit_cred_kproc0(struct ucred *cred);
179 void audit_cred_proc1(struct ucred *cred);
180 void audit_thread_alloc(struct thread *td);
181 void audit_thread_free(struct thread *td);
182
183 /*
184 * Define a macro to wrap the audit_arg_* calls by checking the global
185 * audit_enabled flag before performing the actual call.
186 */
187 #define AUDIT_ARG(op, args...) do { \
188 if (audit_enabled) \
189 audit_arg_ ## op (args); \
190 } while (0)
191
192 #define AUDIT_SYSCALL_ENTER(code, td) do { \
193 if (audit_enabled) { \
194 audit_syscall_enter(code, td); \
195 } \
196 } while (0)
197
198 /*
199 * Wrap the audit_syscall_exit() function so that it is called only when
200 * auditing is enabled, or we have a audit record on the thread. It is
201 * possible that an audit record was begun before auditing was turned off.
202 */
203 #define AUDIT_SYSCALL_EXIT(error, td) do { \
204 if (audit_enabled | (td->td_ar != NULL)) \
205 audit_syscall_exit(error, td); \
206 } while (0)
207
208 /*
209 * A Macro to wrap the audit_sysclose() function.
210 */
211 #define AUDIT_SYSCLOSE(td, fd) do { \
212 if (audit_enabled) \
213 audit_sysclose(td, fd); \
214 } while (0)
215
216 #else /* !AUDIT */
217
218 #define AUDIT_ARG(op, args...) do { \
219 } while (0)
220
221 #define AUDIT_SYSCALL_ENTER(code, td) do { \
222 } while (0)
223
224 #define AUDIT_SYSCALL_EXIT(error, td) do { \
225 } while (0)
226
227 #define AUDIT_SYSCLOSE(p, fd) do { \
228 } while (0)
229
230 #endif /* AUDIT */
231
232 #endif /* !_SECURITY_AUDIT_KERNEL_H_ */
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