source: branches/samba-3.0/source/modules/vfs_extd_audit.c

Last change on this file was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 11.2 KB
Line 
1/*
2 * Auditing VFS module for samba. Log selected file operations to syslog
3 * facility.
4 *
5 * Copyright (C) Tim Potter, 1999-2000
6 * Copyright (C) Alexander Bokovoy, 2002
7 * Copyright (C) John H Terpstra, 2003
8 * Copyright (C) Stefan (metze) Metzmacher, 2003
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25
26#include "includes.h"
27
28static int vfs_extd_audit_debug_level = DBGC_VFS;
29
30#undef DBGC_CLASS
31#define DBGC_CLASS vfs_extd_audit_debug_level
32
33/* Function prototypes */
34
35static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
36static void audit_disconnect(vfs_handle_struct *handle);
37static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
38static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
39static int audit_rmdir(vfs_handle_struct *handle, const char *path);
40static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
41static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd);
42static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
43static int audit_unlink(vfs_handle_struct *handle, const char *path);
44static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
45static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
46static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
47static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
48
49/* VFS operations */
50
51static vfs_op_tuple audit_op_tuples[] = {
52
53 /* Disk operations */
54
55 {SMB_VFS_OP(audit_connect), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER},
56 {SMB_VFS_OP(audit_disconnect), SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER},
57
58 /* Directory operations */
59
60 {SMB_VFS_OP(audit_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER},
61 {SMB_VFS_OP(audit_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER},
62 {SMB_VFS_OP(audit_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER},
63
64 /* File operations */
65
66 {SMB_VFS_OP(audit_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER},
67 {SMB_VFS_OP(audit_close), SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER},
68 {SMB_VFS_OP(audit_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER},
69 {SMB_VFS_OP(audit_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER},
70 {SMB_VFS_OP(audit_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER},
71 {SMB_VFS_OP(audit_fchmod), SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER},
72 {SMB_VFS_OP(audit_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER},
73 {SMB_VFS_OP(audit_fchmod_acl), SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER},
74
75 /* Finish VFS operations definition */
76
77 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
78};
79
80
81static int audit_syslog_facility(vfs_handle_struct *handle)
82{
83 static const struct enum_list enum_log_facilities[] = {
84 { LOG_USER, "USER" },
85 { LOG_LOCAL0, "LOCAL0" },
86 { LOG_LOCAL1, "LOCAL1" },
87 { LOG_LOCAL2, "LOCAL2" },
88 { LOG_LOCAL3, "LOCAL3" },
89 { LOG_LOCAL4, "LOCAL4" },
90 { LOG_LOCAL5, "LOCAL5" },
91 { LOG_LOCAL6, "LOCAL6" },
92 { LOG_LOCAL7, "LOCAL7" }
93 };
94
95 int facility;
96
97 facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
98
99 return facility;
100}
101
102
103static int audit_syslog_priority(vfs_handle_struct *handle)
104{
105 static const struct enum_list enum_log_priorities[] = {
106 { LOG_EMERG, "EMERG" },
107 { LOG_ALERT, "ALERT" },
108 { LOG_CRIT, "CRIT" },
109 { LOG_ERR, "ERR" },
110 { LOG_WARNING, "WARNING" },
111 { LOG_NOTICE, "NOTICE" },
112 { LOG_INFO, "INFO" },
113 { LOG_DEBUG, "DEBUG" }
114 };
115
116 int priority;
117
118 priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority", enum_log_priorities, LOG_NOTICE);
119
120 return priority;
121}
122
123/* Implementation of vfs_ops. Pass everything on to the default
124 operation but log event first. */
125
126static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
127{
128 int result;
129
130 openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
131
132 syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
133 svc, user);
134 DEBUG(10, ("Connected to service %s as user %s\n",
135 svc, user));
136
137 result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
138
139 return result;
140}
141
142static void audit_disconnect(vfs_handle_struct *handle)
143{
144 syslog(audit_syslog_priority(handle), "disconnected\n");
145 DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
146 SMB_VFS_NEXT_DISCONNECT(handle);
147
148 return;
149}
150
151static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
152{
153 SMB_STRUCT_DIR *result;
154
155 result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
156
157 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
158 fname,
159 (result == NULL) ? "failed: " : "",
160 (result == NULL) ? strerror(errno) : "");
161 DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
162 fname,
163 (result == NULL) ? "failed: " : "",
164 (result == NULL) ? strerror(errno) : ""));
165
166 return result;
167}
168
169static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
170{
171 int result;
172
173 result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
174
175 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
176 path,
177 (result < 0) ? "failed: " : "",
178 (result < 0) ? strerror(errno) : "");
179 DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
180 path,
181 (result < 0) ? "failed: " : "",
182 (result < 0) ? strerror(errno) : ""));
183
184 return result;
185}
186
187static int audit_rmdir(vfs_handle_struct *handle, const char *path)
188{
189 int result;
190
191 result = SMB_VFS_NEXT_RMDIR(handle, path);
192
193 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
194 path,
195 (result < 0) ? "failed: " : "",
196 (result < 0) ? strerror(errno) : "");
197 DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
198 path,
199 (result < 0) ? "failed: " : "",
200 (result < 0) ? strerror(errno) : ""));
201
202 return result;
203}
204
205static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
206{
207 int result;
208
209 result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
210
211 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
212 fname, result,
213 ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
214 (result < 0) ? "failed: " : "",
215 (result < 0) ? strerror(errno) : "");
216 DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
217 fname,
218 (result < 0) ? "failed: " : "",
219 (result < 0) ? strerror(errno) : ""));
220
221 return result;
222}
223
224static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
225{
226 int result;
227
228 result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
229
230 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
231 fd,
232 (result < 0) ? "failed: " : "",
233 (result < 0) ? strerror(errno) : "");
234 DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
235 fd,
236 (result < 0) ? "failed: " : "",
237 (result < 0) ? strerror(errno) : ""));
238
239 return result;
240}
241
242static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
243{
244 int result;
245
246 result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
247
248 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
249 oldname, newname,
250 (result < 0) ? "failed: " : "",
251 (result < 0) ? strerror(errno) : "");
252 DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s %s %s\n",
253 oldname, newname,
254 (result < 0) ? "failed: " : "",
255 (result < 0) ? strerror(errno) : ""));
256
257 return result;
258}
259
260static int audit_unlink(vfs_handle_struct *handle, const char *path)
261{
262 int result;
263
264 result = SMB_VFS_NEXT_UNLINK(handle, path);
265
266 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
267 path,
268 (result < 0) ? "failed: " : "",
269 (result < 0) ? strerror(errno) : "");
270 DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
271 path,
272 (result < 0) ? "failed: " : "",
273 (result < 0) ? strerror(errno) : ""));
274
275 return result;
276}
277
278static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
279{
280 int result;
281
282 result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
283
284 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
285 path, mode,
286 (result < 0) ? "failed: " : "",
287 (result < 0) ? strerror(errno) : "");
288 DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
289 path, mode,
290 (result < 0) ? "failed: " : "",
291 (result < 0) ? strerror(errno) : ""));
292
293 return result;
294}
295
296static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
297{
298 int result;
299
300 result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
301
302 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
303 path, mode,
304 (result < 0) ? "failed: " : "",
305 (result < 0) ? strerror(errno) : "");
306 DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
307 path, mode,
308 (result < 0) ? "failed: " : "",
309 (result < 0) ? strerror(errno) : ""));
310
311 return result;
312}
313
314static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
315{
316 int result;
317
318 result = SMB_VFS_NEXT_FCHMOD(handle, fsp, fd, mode);
319
320 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
321 fsp->fsp_name, mode,
322 (result < 0) ? "failed: " : "",
323 (result < 0) ? strerror(errno) : "");
324 DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
325 fsp->fsp_name, mode,
326 (result < 0) ? "failed: " : "",
327 (result < 0) ? strerror(errno) : ""));
328
329 return result;
330}
331
332static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
333{
334 int result;
335
336 result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, fd, mode);
337
338 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
339 fsp->fsp_name, mode,
340 (result < 0) ? "failed: " : "",
341 (result < 0) ? strerror(errno) : "");
342 DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
343 fsp->fsp_name, mode,
344 (result < 0) ? "failed: " : "",
345 (result < 0) ? strerror(errno) : ""));
346
347 return result;
348}
349
350NTSTATUS vfs_extd_audit_init(void);
351NTSTATUS vfs_extd_audit_init(void)
352{
353 NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
354
355 if (!NT_STATUS_IS_OK(ret))
356 return ret;
357
358 vfs_extd_audit_debug_level = debug_add_class("extd_audit");
359 if (vfs_extd_audit_debug_level == -1) {
360 vfs_extd_audit_debug_level = DBGC_VFS;
361 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
362 } else {
363 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
364 }
365
366 return ret;
367}
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