source3/modules/vfs_extd_audit.c

   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 3 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, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "includes.h"
  26
  27 static int vfs_extd_audit_debug_level = DBGC_VFS;
  28
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS vfs_extd_audit_debug_level
  31
  32 /* Function prototypes */
  33
  34 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
  35 static void audit_disconnect(vfs_handle_struct *handle);
  36 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
  37 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
  38 static int audit_rmdir(vfs_handle_struct *handle, const char *path);
  39 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
  40 static int audit_close(vfs_handle_struct *handle, files_struct *fsp);
  41 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
  42 static int audit_unlink(vfs_handle_struct *handle, const char *path);
  43 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
  44 static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
  45 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
  46 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
  47
  48 /* VFS operations */
  49
  50 static vfs_op_tuple audit_op_tuples[] = {
  51
  52         /* Disk operations */
  53
  54         {SMB_VFS_OP(audit_connect),     SMB_VFS_OP_CONNECT,     SMB_VFS_LAYER_LOGGER},
  55         {SMB_VFS_OP(audit_disconnect),  SMB_VFS_OP_DISCONNECT,  SMB_VFS_LAYER_LOGGER},
  56
  57         /* Directory operations */
  58
  59         {SMB_VFS_OP(audit_opendir),     SMB_VFS_OP_OPENDIR,     SMB_VFS_LAYER_LOGGER},
  60         {SMB_VFS_OP(audit_mkdir),               SMB_VFS_OP_MKDIR,       SMB_VFS_LAYER_LOGGER},
  61         {SMB_VFS_OP(audit_rmdir),               SMB_VFS_OP_RMDIR,       SMB_VFS_LAYER_LOGGER},
  62
  63         /* File operations */
  64
  65         {SMB_VFS_OP(audit_open),                SMB_VFS_OP_OPEN,        SMB_VFS_LAYER_LOGGER},
  66         {SMB_VFS_OP(audit_close),               SMB_VFS_OP_CLOSE,       SMB_VFS_LAYER_LOGGER},
  67         {SMB_VFS_OP(audit_rename),              SMB_VFS_OP_RENAME,      SMB_VFS_LAYER_LOGGER},
  68         {SMB_VFS_OP(audit_unlink),              SMB_VFS_OP_UNLINK,      SMB_VFS_LAYER_LOGGER},
  69         {SMB_VFS_OP(audit_chmod),               SMB_VFS_OP_CHMOD,       SMB_VFS_LAYER_LOGGER},
  70         {SMB_VFS_OP(audit_fchmod),              SMB_VFS_OP_FCHMOD,      SMB_VFS_LAYER_LOGGER},
  71         {SMB_VFS_OP(audit_chmod_acl),   SMB_VFS_OP_CHMOD_ACL,   SMB_VFS_LAYER_LOGGER},
  72         {SMB_VFS_OP(audit_fchmod_acl),  SMB_VFS_OP_FCHMOD_ACL,  SMB_VFS_LAYER_LOGGER},
  73
  74         /* Finish VFS operations definition */
  75
  76         {SMB_VFS_OP(NULL),                      SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
  77 };
  78
  79
  80 static int audit_syslog_facility(vfs_handle_struct *handle)
  81 {
  82         static const struct enum_list enum_log_facilities[] = {
  83                 { LOG_USER, "USER" },
  84                 { LOG_LOCAL0, "LOCAL0" },
  85                 { LOG_LOCAL1, "LOCAL1" },
  86                 { LOG_LOCAL2, "LOCAL2" },
  87                 { LOG_LOCAL3, "LOCAL3" },
  88                 { LOG_LOCAL4, "LOCAL4" },
  89                 { LOG_LOCAL5, "LOCAL5" },
  90                 { LOG_LOCAL6, "LOCAL6" },
  91                 { LOG_LOCAL7, "LOCAL7" }
  92         };
  93
  94         int facility;
  95
  96         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  97
  98         return facility;
  99 }
 100
 101
 102 static int audit_syslog_priority(vfs_handle_struct *handle)
 103 {
 104         static const struct enum_list enum_log_priorities[] = {
 105                 { LOG_EMERG, "EMERG" },
 106                 { LOG_ALERT, "ALERT" },
 107                 { LOG_CRIT, "CRIT" },
 108                 { LOG_ERR, "ERR" },
 109                 { LOG_WARNING, "WARNING" },
 110                 { LOG_NOTICE, "NOTICE" },
 111                 { LOG_INFO, "INFO" },
 112                 { LOG_DEBUG, "DEBUG" }
 113         };
 114
 115         int priority;
 116
 117         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
 118                                 enum_log_priorities, LOG_NOTICE);
 119         if (priority == -1) {
 120                 priority = LOG_WARNING;
 121         }
 122
 123         return priority;
 124 }
 125
 126 /* Implementation of vfs_ops.  Pass everything on to the default
 127    operation but log event first. */
 128
 129 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 130 {
 131         int result;
 132
 133         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 134
 135         if (lp_syslog() > 0) {
 136                 syslog(audit_syslog_priority(handle),
 137                        "connect to service %s by user %s\n",
 138                        svc, user);
 139         }
 140         DEBUG(10, ("Connected to service %s as user %s\n",
 141                svc, user));
 142
 143         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 144
 145         return result;
 146 }
 147
 148 static void audit_disconnect(vfs_handle_struct *handle)
 149 {
 150         if (lp_syslog() > 0) {
 151                 syslog(audit_syslog_priority(handle), "disconnected\n");
 152         }
 153         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 154         SMB_VFS_NEXT_DISCONNECT(handle);
 155
 156         return;
 157 }
 158
 159 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 160 {
 161         SMB_STRUCT_DIR *result;
 162
 163         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 164
 165         if (lp_syslog() > 0) {
 166                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 167                        fname,
 168                        (result == NULL) ? "failed: " : "",
 169                        (result == NULL) ? strerror(errno) : "");
 170         }
 171         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 172                fname,
 173                (result == NULL) ? "failed: " : "",
 174                (result == NULL) ? strerror(errno) : ""));
 175
 176         return result;
 177 }
 178
 179 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 180 {
 181         int result;
 182
 183         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 184
 185         if (lp_syslog() > 0) {
 186                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 187                        path,
 188                        (result < 0) ? "failed: " : "",
 189                        (result < 0) ? strerror(errno) : "");
 190         }
 191         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 192                path,
 193                (result < 0) ? "failed: " : "",
 194                (result < 0) ? strerror(errno) : ""));
 195
 196         return result;
 197 }
 198
 199 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 200 {
 201         int result;
 202
 203         result = SMB_VFS_NEXT_RMDIR(handle, path);
 204
 205         if (lp_syslog() > 0) {
 206                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 207                        path,
 208                        (result < 0) ? "failed: " : "",
 209                        (result < 0) ? strerror(errno) : "");
 210         }
 211         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 212                path,
 213                (result < 0) ? "failed: " : "",
 214                (result < 0) ? strerror(errno) : ""));
 215
 216         return result;
 217 }
 218
 219 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
 220 {
 221         int result;
 222
 223         result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 224
 225         if (lp_syslog() > 0) {
 226                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 227                        fname, result,
 228                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 229                        (result < 0) ? "failed: " : "",
 230                        (result < 0) ? strerror(errno) : "");
 231         }
 232         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 233                fname,
 234                (result < 0) ? "failed: " : "",
 235                (result < 0) ? strerror(errno) : ""));
 236
 237         return result;
 238 }
 239
 240 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 241 {
 242         int result;
 243
 244         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 245
 246         if (lp_syslog() > 0) {
 247                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 248                        fsp->fh->fd,
 249                        (result < 0) ? "failed: " : "",
 250                        (result < 0) ? strerror(errno) : "");
 251         }
 252         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 253                fsp->fh->fd,
 254                (result < 0) ? "failed: " : "",
 255                (result < 0) ? strerror(errno) : ""));
 256
 257         return result;
 258 }
 259
 260 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
 261 {
 262         int result;
 263
 264         result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
 265
 266         if (lp_syslog() > 0) {
 267                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 268                        oldname, newname,
 269                        (result < 0) ? "failed: " : "",
 270                        (result < 0) ? strerror(errno) : "");
 271         }
 272         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 273                oldname, newname,
 274                (result < 0) ? "failed: " : "",
 275                (result < 0) ? strerror(errno) : ""));
 276
 277         return result;
 278 }
 279
 280 static int audit_unlink(vfs_handle_struct *handle, const char *path)
 281 {
 282         int result;
 283
 284         result = SMB_VFS_NEXT_UNLINK(handle, path);
 285
 286         if (lp_syslog() > 0) {
 287                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 288                        path,
 289                        (result < 0) ? "failed: " : "",
 290                        (result < 0) ? strerror(errno) : "");
 291         }
 292         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 293                path,
 294                (result < 0) ? "failed: " : "",
 295                (result < 0) ? strerror(errno) : ""));
 296
 297         return result;
 298 }
 299
 300 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 301 {
 302         int result;
 303
 304         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 305
 306         if (lp_syslog() > 0) {
 307                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 308                        path, mode,
 309                        (result < 0) ? "failed: " : "",
 310                        (result < 0) ? strerror(errno) : "");
 311         }
 312         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 313                path, mode,
 314                (result < 0) ? "failed: " : "",
 315                (result < 0) ? strerror(errno) : ""));
 316
 317         return result;
 318 }
 319
 320 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 321 {
 322         int result;
 323
 324         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 325
 326         if (lp_syslog() > 0) {
 327                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 328                        path, mode,
 329                        (result < 0) ? "failed: " : "",
 330                        (result < 0) ? strerror(errno) : "");
 331         }
 332         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 333                 path, mode,
 334                (result < 0) ? "failed: " : "",
 335                (result < 0) ? strerror(errno) : ""));
 336
 337         return result;
 338 }
 339
 340 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 341 {
 342         int result;
 343
 344         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 345
 346         if (lp_syslog() > 0) {
 347                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 348                        fsp->fsp_name, mode,
 349                        (result < 0) ? "failed: " : "",
 350                        (result < 0) ? strerror(errno) : "");
 351         }
 352         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 353                fsp->fsp_name,  mode,
 354                (result < 0) ? "failed: " : "",
 355                (result < 0) ? strerror(errno) : ""));
 356
 357         return result;
 358 }
 359
 360 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 361 {
 362         int result;
 363
 364         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 365
 366         if (lp_syslog() > 0) {
 367                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 368                        fsp->fsp_name, mode,
 369                        (result < 0) ? "failed: " : "",
 370                        (result < 0) ? strerror(errno) : "");
 371         }
 372         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 373                fsp->fsp_name,  mode,
 374                (result < 0) ? "failed: " : "",
 375                (result < 0) ? strerror(errno) : ""));
 376
 377         return result;
 378 }
 379
 380 NTSTATUS vfs_extd_audit_init(void);
 381 NTSTATUS vfs_extd_audit_init(void)
 382 {
 383         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 384
 385         if (!NT_STATUS_IS_OK(ret))
 386                 return ret;
 387
 388         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 389         if (vfs_extd_audit_debug_level == -1) {
 390                 vfs_extd_audit_debug_level = DBGC_VFS;
 391                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 392         } else {
 393                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 394         }
 395
 396         return ret;
 397 }