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, struct smb_filename *smb_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,
  42                         const struct smb_filename *smb_fname_src,
  43                         const struct smb_filename *smb_fname_dst);
  44 static int audit_unlink(vfs_handle_struct *handle, const char *path);
  45 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
  46 static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
  47 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
  48 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
  49
  50 /* VFS operations */
  51
  52 static vfs_op_tuple audit_op_tuples[] = {
  53
  54         /* Disk operations */
  55
  56         {SMB_VFS_OP(audit_connect),     SMB_VFS_OP_CONNECT,     SMB_VFS_LAYER_LOGGER},
  57         {SMB_VFS_OP(audit_disconnect),  SMB_VFS_OP_DISCONNECT,  SMB_VFS_LAYER_LOGGER},
  58
  59         /* Directory operations */
  60
  61         {SMB_VFS_OP(audit_opendir),     SMB_VFS_OP_OPENDIR,     SMB_VFS_LAYER_LOGGER},
  62         {SMB_VFS_OP(audit_mkdir),               SMB_VFS_OP_MKDIR,       SMB_VFS_LAYER_LOGGER},
  63         {SMB_VFS_OP(audit_rmdir),               SMB_VFS_OP_RMDIR,       SMB_VFS_LAYER_LOGGER},
  64
  65         /* File operations */
  66
  67         {SMB_VFS_OP(audit_open),                SMB_VFS_OP_OPEN,        SMB_VFS_LAYER_LOGGER},
  68         {SMB_VFS_OP(audit_close),               SMB_VFS_OP_CLOSE,       SMB_VFS_LAYER_LOGGER},
  69         {SMB_VFS_OP(audit_rename),              SMB_VFS_OP_RENAME,      SMB_VFS_LAYER_LOGGER},
  70         {SMB_VFS_OP(audit_unlink),              SMB_VFS_OP_UNLINK,      SMB_VFS_LAYER_LOGGER},
  71         {SMB_VFS_OP(audit_chmod),               SMB_VFS_OP_CHMOD,       SMB_VFS_LAYER_LOGGER},
  72         {SMB_VFS_OP(audit_fchmod),              SMB_VFS_OP_FCHMOD,      SMB_VFS_LAYER_LOGGER},
  73         {SMB_VFS_OP(audit_chmod_acl),   SMB_VFS_OP_CHMOD_ACL,   SMB_VFS_LAYER_LOGGER},
  74         {SMB_VFS_OP(audit_fchmod_acl),  SMB_VFS_OP_FCHMOD_ACL,  SMB_VFS_LAYER_LOGGER},
  75
  76         /* Finish VFS operations definition */
  77
  78         {SMB_VFS_OP(NULL),                      SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
  79 };
  80
  81
  82 static int audit_syslog_facility(vfs_handle_struct *handle)
  83 {
  84         static const struct enum_list enum_log_facilities[] = {
  85                 { LOG_USER, "USER" },
  86                 { LOG_LOCAL0, "LOCAL0" },
  87                 { LOG_LOCAL1, "LOCAL1" },
  88                 { LOG_LOCAL2, "LOCAL2" },
  89                 { LOG_LOCAL3, "LOCAL3" },
  90                 { LOG_LOCAL4, "LOCAL4" },
  91                 { LOG_LOCAL5, "LOCAL5" },
  92                 { LOG_LOCAL6, "LOCAL6" },
  93                 { LOG_LOCAL7, "LOCAL7" }
  94         };
  95
  96         int facility;
  97
  98         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  99
 100         return facility;
 101 }
 102
 103
 104 static int audit_syslog_priority(vfs_handle_struct *handle)
 105 {
 106         static const struct enum_list enum_log_priorities[] = {
 107                 { LOG_EMERG, "EMERG" },
 108                 { LOG_ALERT, "ALERT" },
 109                 { LOG_CRIT, "CRIT" },
 110                 { LOG_ERR, "ERR" },
 111                 { LOG_WARNING, "WARNING" },
 112                 { LOG_NOTICE, "NOTICE" },
 113                 { LOG_INFO, "INFO" },
 114                 { LOG_DEBUG, "DEBUG" }
 115         };
 116
 117         int priority;
 118
 119         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
 120                                 enum_log_priorities, LOG_NOTICE);
 121         if (priority == -1) {
 122                 priority = LOG_WARNING;
 123         }
 124
 125         return priority;
 126 }
 127
 128 /* Implementation of vfs_ops.  Pass everything on to the default
 129    operation but log event first. */
 130
 131 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 132 {
 133         int result;
 134
 135         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 136
 137         if (lp_syslog() > 0) {
 138                 syslog(audit_syslog_priority(handle),
 139                        "connect to service %s by user %s\n",
 140                        svc, user);
 141         }
 142         DEBUG(10, ("Connected to service %s as user %s\n",
 143                svc, user));
 144
 145         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 146
 147         return result;
 148 }
 149
 150 static void audit_disconnect(vfs_handle_struct *handle)
 151 {
 152         if (lp_syslog() > 0) {
 153                 syslog(audit_syslog_priority(handle), "disconnected\n");
 154         }
 155         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 156         SMB_VFS_NEXT_DISCONNECT(handle);
 157
 158         return;
 159 }
 160
 161 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 162 {
 163         SMB_STRUCT_DIR *result;
 164
 165         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 166
 167         if (lp_syslog() > 0) {
 168                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 169                        fname,
 170                        (result == NULL) ? "failed: " : "",
 171                        (result == NULL) ? strerror(errno) : "");
 172         }
 173         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 174                fname,
 175                (result == NULL) ? "failed: " : "",
 176                (result == NULL) ? strerror(errno) : ""));
 177
 178         return result;
 179 }
 180
 181 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 182 {
 183         int result;
 184
 185         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 186
 187         if (lp_syslog() > 0) {
 188                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 189                        path,
 190                        (result < 0) ? "failed: " : "",
 191                        (result < 0) ? strerror(errno) : "");
 192         }
 193         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 194                path,
 195                (result < 0) ? "failed: " : "",
 196                (result < 0) ? strerror(errno) : ""));
 197
 198         return result;
 199 }
 200
 201 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 202 {
 203         int result;
 204
 205         result = SMB_VFS_NEXT_RMDIR(handle, path);
 206
 207         if (lp_syslog() > 0) {
 208                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 209                        path,
 210                        (result < 0) ? "failed: " : "",
 211                        (result < 0) ? strerror(errno) : "");
 212         }
 213         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 214                path,
 215                (result < 0) ? "failed: " : "",
 216                (result < 0) ? strerror(errno) : ""));
 217
 218         return result;
 219 }
 220
 221 static int audit_open(vfs_handle_struct *handle,
 222                       struct smb_filename *smb_fname, files_struct *fsp,
 223                       int flags, mode_t mode)
 224 {
 225         int result;
 226
 227         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 228
 229         if (lp_syslog() > 0) {
 230                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 231                        smb_fname_str_dbg(smb_fname), result,
 232                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 233                        (result < 0) ? "failed: " : "",
 234                        (result < 0) ? strerror(errno) : "");
 235         }
 236         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 237                smb_fname_str_dbg(smb_fname),
 238                (result < 0) ? "failed: " : "",
 239                (result < 0) ? strerror(errno) : ""));
 240
 241         return result;
 242 }
 243
 244 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 245 {
 246         int result;
 247
 248         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 249
 250         if (lp_syslog() > 0) {
 251                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 252                        fsp->fh->fd,
 253                        (result < 0) ? "failed: " : "",
 254                        (result < 0) ? strerror(errno) : "");
 255         }
 256         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 257                fsp->fh->fd,
 258                (result < 0) ? "failed: " : "",
 259                (result < 0) ? strerror(errno) : ""));
 260
 261         return result;
 262 }
 263
 264 static int audit_rename(vfs_handle_struct *handle,
 265                         const struct smb_filename *smb_fname_src,
 266                         const struct smb_filename *smb_fname_dst)
 267 {
 268         int result;
 269
 270         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 271
 272         if (lp_syslog() > 0) {
 273                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 274                        smb_fname_str_dbg(smb_fname_src),
 275                        smb_fname_str_dbg(smb_fname_dst),
 276                        (result < 0) ? "failed: " : "",
 277                        (result < 0) ? strerror(errno) : "");
 278         }
 279         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 280                 smb_fname_str_dbg(smb_fname_src),
 281                 smb_fname_str_dbg(smb_fname_dst),
 282                (result < 0) ? "failed: " : "",
 283                (result < 0) ? strerror(errno) : ""));
 284
 285         return result;
 286 }
 287
 288 static int audit_unlink(vfs_handle_struct *handle, const char *path)
 289 {
 290         int result;
 291
 292         result = SMB_VFS_NEXT_UNLINK(handle, path);
 293
 294         if (lp_syslog() > 0) {
 295                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 296                        path,
 297                        (result < 0) ? "failed: " : "",
 298                        (result < 0) ? strerror(errno) : "");
 299         }
 300         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 301                path,
 302                (result < 0) ? "failed: " : "",
 303                (result < 0) ? strerror(errno) : ""));
 304
 305         return result;
 306 }
 307
 308 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 309 {
 310         int result;
 311
 312         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 313
 314         if (lp_syslog() > 0) {
 315                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 316                        path, mode,
 317                        (result < 0) ? "failed: " : "",
 318                        (result < 0) ? strerror(errno) : "");
 319         }
 320         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 321                path, (unsigned int)mode,
 322                (result < 0) ? "failed: " : "",
 323                (result < 0) ? strerror(errno) : ""));
 324
 325         return result;
 326 }
 327
 328 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 329 {
 330         int result;
 331
 332         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 333
 334         if (lp_syslog() > 0) {
 335                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 336                        path, mode,
 337                        (result < 0) ? "failed: " : "",
 338                        (result < 0) ? strerror(errno) : "");
 339         }
 340         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 341                 path, (unsigned int)mode,
 342                (result < 0) ? "failed: " : "",
 343                (result < 0) ? strerror(errno) : ""));
 344
 345         return result;
 346 }
 347
 348 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 349 {
 350         int result;
 351
 352         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 353
 354         if (lp_syslog() > 0) {
 355                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 356                        fsp->fsp_name, mode,
 357                        (result < 0) ? "failed: " : "",
 358                        (result < 0) ? strerror(errno) : "");
 359         }
 360         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 361                fsp->fsp_name,  (unsigned int)mode,
 362                (result < 0) ? "failed: " : "",
 363                (result < 0) ? strerror(errno) : ""));
 364
 365         return result;
 366 }
 367
 368 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 369 {
 370         int result;
 371
 372         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 373
 374         if (lp_syslog() > 0) {
 375                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 376                        fsp->fsp_name, mode,
 377                        (result < 0) ? "failed: " : "",
 378                        (result < 0) ? strerror(errno) : "");
 379         }
 380         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 381                fsp->fsp_name,  (unsigned int)mode,
 382                (result < 0) ? "failed: " : "",
 383                (result < 0) ? strerror(errno) : ""));
 384
 385         return result;
 386 }
 387
 388 NTSTATUS vfs_extd_audit_init(void);
 389 NTSTATUS vfs_extd_audit_init(void)
 390 {
 391         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 392
 393         if (!NT_STATUS_IS_OK(ret))
 394                 return ret;
 395
 396         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 397         if (vfs_extd_audit_debug_level == -1) {
 398                 vfs_extd_audit_debug_level = DBGC_VFS;
 399                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 400         } else {
 401                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 402         }
 403
 404         return ret;
 405 }