summaryrefslogtreecommitdiff
path: root/source3/modules/vfs_extd_audit.c
blob: f9b03731e7097c2b87cd8338d6ea9cd9db3181f6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/* 
 * Auditing VFS module for samba.  Log selected file operations to syslog
 * facility.
 *
 * Copyright (C) Tim Potter, 1999-2000
 * Copyright (C) Alexander Bokovoy, 2002
 * Copyright (C) John H Terpstra, 2003
 * Copyright (C) Stefan (metze) Metzmacher, 2003
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *  
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */


#include "includes.h"

static int vfs_extd_audit_debug_level = DBGC_VFS;

#undef DBGC_CLASS
#define DBGC_CLASS vfs_extd_audit_debug_level

/* Function prototypes */

static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
static void audit_disconnect(vfs_handle_struct *handle);
static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
static int audit_rmdir(vfs_handle_struct *handle, const char *path);
static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd);
static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
static int audit_unlink(vfs_handle_struct *handle, const char *path);
static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);

/* VFS operations */

static vfs_op_tuple audit_op_tuples[] = {
    
	/* Disk operations */

	{SMB_VFS_OP(audit_connect), 	SMB_VFS_OP_CONNECT, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_disconnect), 	SMB_VFS_OP_DISCONNECT, 	SMB_VFS_LAYER_LOGGER},

	/* Directory operations */

	{SMB_VFS_OP(audit_opendir), 	SMB_VFS_OP_OPENDIR, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_mkdir), 		SMB_VFS_OP_MKDIR, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_rmdir), 		SMB_VFS_OP_RMDIR, 	SMB_VFS_LAYER_LOGGER},

	/* File operations */

	{SMB_VFS_OP(audit_open), 		SMB_VFS_OP_OPEN, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_close), 		SMB_VFS_OP_CLOSE, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_rename), 		SMB_VFS_OP_RENAME, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_unlink), 		SMB_VFS_OP_UNLINK, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_chmod), 		SMB_VFS_OP_CHMOD, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_fchmod), 		SMB_VFS_OP_FCHMOD, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_chmod_acl), 	SMB_VFS_OP_CHMOD_ACL, 	SMB_VFS_LAYER_LOGGER},
	{SMB_VFS_OP(audit_fchmod_acl), 	SMB_VFS_OP_FCHMOD_ACL, 	SMB_VFS_LAYER_LOGGER},
	
	/* Finish VFS operations definition */
	
	{SMB_VFS_OP(NULL), 			SMB_VFS_OP_NOOP, 	SMB_VFS_LAYER_NOOP}
};


static int audit_syslog_facility(vfs_handle_struct *handle)
{
	static const struct enum_list enum_log_facilities[] = {
		{ LOG_USER, "USER" },
		{ LOG_LOCAL0, "LOCAL0" },
		{ LOG_LOCAL1, "LOCAL1" },
		{ LOG_LOCAL2, "LOCAL2" },
		{ LOG_LOCAL3, "LOCAL3" },
		{ LOG_LOCAL4, "LOCAL4" },
		{ LOG_LOCAL5, "LOCAL5" },
		{ LOG_LOCAL6, "LOCAL6" },
		{ LOG_LOCAL7, "LOCAL7" }
	};

	int facility;

	facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);

	return facility;
}


static int audit_syslog_priority(vfs_handle_struct *handle)
{
	static const struct enum_list enum_log_priorities[] = {
		{ LOG_EMERG, "EMERG" },
		{ LOG_ALERT, "ALERT" },
		{ LOG_CRIT, "CRIT" },
		{ LOG_ERR, "ERR" },
		{ LOG_WARNING, "WARNING" },
		{ LOG_NOTICE, "NOTICE" },
		{ LOG_INFO, "INFO" },
		{ LOG_DEBUG, "DEBUG" }
	};

	int priority;

	priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority", enum_log_priorities, LOG_NOTICE);

	return priority;
}

/* Implementation of vfs_ops.  Pass everything on to the default
   operation but log event first. */

static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
{
	int result;

	openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));

	syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n", 
	       svc, user);
	DEBUG(10, ("Connected to service %s as user %s\n",
	       svc, user));

	result = SMB_VFS_NEXT_CONNECT(handle, svc, user);

	return result;
}

static void audit_disconnect(vfs_handle_struct *handle)
{
	syslog(audit_syslog_priority(handle), "disconnected\n");
	DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
	SMB_VFS_NEXT_DISCONNECT(handle);

	return;
}

static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
{
	SMB_STRUCT_DIR *result;

	result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);

	syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
	       fname,
	       (result == NULL) ? "failed: " : "",
	       (result == NULL) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
	       fname,
	       (result == NULL) ? "failed: " : "",
	       (result == NULL) ? strerror(errno) : ""));

	return result;
}

static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
{
	int result;
	
	result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
	
	syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n", 
	       path,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
	       path,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_rmdir(vfs_handle_struct *handle, const char *path)
{
	int result;
	
	result = SMB_VFS_NEXT_RMDIR(handle, path);

	syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n", 
	       path, 
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
               path,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
{
	int result;
	
	result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);

	syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n", 
	       fname, result,
	       ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "", 
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
	       fname,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
	int result;
	
	result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);

	syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
	       fd,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
	       fd,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
{
	int result;
	
	result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);

	syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
	       oldname, newname,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
	       oldname, newname,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;    
}

static int audit_unlink(vfs_handle_struct *handle, const char *path)
{
	int result;
	
	result = SMB_VFS_NEXT_UNLINK(handle, path);

	syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
	       path,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
	       path,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
{
	int result;

	result = SMB_VFS_NEXT_CHMOD(handle, path, mode);

	syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
	       path, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
	       path, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
{
	int result;
	
	result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);

	syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
	       path, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
	        path, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
{
	int result;
	
	result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);

	syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
	       fsp->fsp_name, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
	       fsp->fsp_name,  mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
{
	int result;
	
	result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, fd, mode);

	syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
	       fsp->fsp_name, mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : "");
	DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
	       fsp->fsp_name,  mode,
	       (result < 0) ? "failed: " : "",
	       (result < 0) ? strerror(errno) : ""));

	return result;
}

NTSTATUS vfs_extd_audit_init(void);
NTSTATUS vfs_extd_audit_init(void)
{
	NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
	
	if (!NT_STATUS_IS_OK(ret))
		return ret;

	vfs_extd_audit_debug_level = debug_add_class("extd_audit");
	if (vfs_extd_audit_debug_level == -1) {
		vfs_extd_audit_debug_level = DBGC_VFS;
		DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
	} else {
		DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
	}
	
	return ret;
}