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

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

Initial code import
File size: 8.8 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) Stefan (metze) Metzmacher 2002
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24
25#include "includes.h"
26
27#undef DBGC_CLASS
28#define DBGC_CLASS DBGC_VFS
29
30/* Function prototypes */
31
32static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
33static void audit_disconnect(vfs_handle_struct *handle);
34static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
35static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
36static int audit_rmdir(vfs_handle_struct *handle, const char *path);
37static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
38static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd);
39static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
40static int audit_unlink(vfs_handle_struct *handle, const char *path);
41static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
42static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
43static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
44static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
45
46/* VFS operations */
47
48static vfs_op_tuple audit_op_tuples[] = {
49
50 /* Disk operations */
51
52 {SMB_VFS_OP(audit_connect), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER},
53 {SMB_VFS_OP(audit_disconnect), SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER},
54
55 /* Directory operations */
56
57 {SMB_VFS_OP(audit_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER},
58 {SMB_VFS_OP(audit_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER},
59 {SMB_VFS_OP(audit_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER},
60
61 /* File operations */
62
63 {SMB_VFS_OP(audit_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER},
64 {SMB_VFS_OP(audit_close), SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER},
65 {SMB_VFS_OP(audit_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER},
66 {SMB_VFS_OP(audit_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER},
67 {SMB_VFS_OP(audit_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER},
68 {SMB_VFS_OP(audit_fchmod), SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER},
69 {SMB_VFS_OP(audit_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER},
70 {SMB_VFS_OP(audit_fchmod_acl), SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER},
71
72 /* Finish VFS operations definition */
73
74 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
75};
76
77
78static int audit_syslog_facility(vfs_handle_struct *handle)
79{
80 static const struct enum_list enum_log_facilities[] = {
81 { LOG_USER, "USER" },
82 { LOG_LOCAL0, "LOCAL0" },
83 { LOG_LOCAL1, "LOCAL1" },
84 { LOG_LOCAL2, "LOCAL2" },
85 { LOG_LOCAL3, "LOCAL3" },
86 { LOG_LOCAL4, "LOCAL4" },
87 { LOG_LOCAL5, "LOCAL5" },
88 { LOG_LOCAL6, "LOCAL6" },
89 { LOG_LOCAL7, "LOCAL7" }
90 };
91
92 int facility;
93
94 facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
95
96 return facility;
97}
98
99
100static int audit_syslog_priority(vfs_handle_struct *handle)
101{
102 static const struct enum_list enum_log_priorities[] = {
103 { LOG_EMERG, "EMERG" },
104 { LOG_ALERT, "ALERT" },
105 { LOG_CRIT, "CRIT" },
106 { LOG_ERR, "ERR" },
107 { LOG_WARNING, "WARNING" },
108 { LOG_NOTICE, "NOTICE" },
109 { LOG_INFO, "INFO" },
110 { LOG_DEBUG, "DEBUG" }
111 };
112
113 int priority;
114
115 priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority", enum_log_priorities, LOG_NOTICE);
116
117 return priority;
118}
119
120/* Implementation of vfs_ops. Pass everything on to the default
121 operation but log event first. */
122
123static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
124{
125 int result;
126
127 openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
128
129 syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
130 svc, user);
131
132 result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
133
134 return result;
135}
136
137static void audit_disconnect(vfs_handle_struct *handle)
138{
139 syslog(audit_syslog_priority(handle), "disconnected\n");
140 SMB_VFS_NEXT_DISCONNECT(handle);
141
142 return;
143}
144
145static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
146{
147 SMB_STRUCT_DIR *result;
148
149 result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
150
151 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
152 fname,
153 (result == NULL) ? "failed: " : "",
154 (result == NULL) ? strerror(errno) : "");
155
156 return result;
157}
158
159static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
160{
161 int result;
162
163 result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
164
165 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
166 path,
167 (result < 0) ? "failed: " : "",
168 (result < 0) ? strerror(errno) : "");
169
170 return result;
171}
172
173static int audit_rmdir(vfs_handle_struct *handle, const char *path)
174{
175 int result;
176
177 result = SMB_VFS_NEXT_RMDIR(handle, path);
178
179 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
180 path,
181 (result < 0) ? "failed: " : "",
182 (result < 0) ? strerror(errno) : "");
183
184 return result;
185}
186
187static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
188{
189 int result;
190
191 result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
192
193 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
194 fname, result,
195 ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
196 (result < 0) ? "failed: " : "",
197 (result < 0) ? strerror(errno) : "");
198
199 return result;
200}
201
202static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
203{
204 int result;
205
206 result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
207
208 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
209 fd,
210 (result < 0) ? "failed: " : "",
211 (result < 0) ? strerror(errno) : "");
212
213 return result;
214}
215
216static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
217{
218 int result;
219
220 result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
221
222 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
223 oldname, newname,
224 (result < 0) ? "failed: " : "",
225 (result < 0) ? strerror(errno) : "");
226
227 return result;
228}
229
230static int audit_unlink(vfs_handle_struct *handle, const char *path)
231{
232 int result;
233
234 result = SMB_VFS_NEXT_UNLINK(handle, path);
235
236 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
237 path,
238 (result < 0) ? "failed: " : "",
239 (result < 0) ? strerror(errno) : "");
240
241 return result;
242}
243
244static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
245{
246 int result;
247
248 result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
249
250 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
251 path, mode,
252 (result < 0) ? "failed: " : "",
253 (result < 0) ? strerror(errno) : "");
254
255 return result;
256}
257
258static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
259{
260 int result;
261
262 result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
263
264 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
265 path, mode,
266 (result < 0) ? "failed: " : "",
267 (result < 0) ? strerror(errno) : "");
268
269 return result;
270}
271
272static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
273{
274 int result;
275
276 result = SMB_VFS_NEXT_FCHMOD(handle, fsp, fd, mode);
277
278 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
279 fsp->fsp_name, mode,
280 (result < 0) ? "failed: " : "",
281 (result < 0) ? strerror(errno) : "");
282
283 return result;
284}
285
286static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
287{
288 int result;
289
290 result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, fd, mode);
291
292 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
293 fsp->fsp_name, mode,
294 (result < 0) ? "failed: " : "",
295 (result < 0) ? strerror(errno) : "");
296
297 return result;
298}
299
300NTSTATUS vfs_audit_init(void);
301NTSTATUS vfs_audit_init(void)
302{
303 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit", audit_op_tuples);
304}
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