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 #include "system/filesys.h"
  27 #include "system/syslog.h"
  28 #include "smbd/smbd.h"
  29 #include "lib/param/loadparm.h"
  30
  31 static int vfs_extd_audit_debug_level = DBGC_VFS;
  32
  33 #undef DBGC_CLASS
  34 #define DBGC_CLASS vfs_extd_audit_debug_level
  35
  36 static int audit_syslog_facility(vfs_handle_struct *handle)
  37 {
  38         static const struct enum_list enum_log_facilities[] = {
  39                 { LOG_USER, "USER" },
  40                 { LOG_LOCAL0, "LOCAL0" },
  41                 { LOG_LOCAL1, "LOCAL1" },
  42                 { LOG_LOCAL2, "LOCAL2" },
  43                 { LOG_LOCAL3, "LOCAL3" },
  44                 { LOG_LOCAL4, "LOCAL4" },
  45                 { LOG_LOCAL5, "LOCAL5" },
  46                 { LOG_LOCAL6, "LOCAL6" },
  47                 { LOG_LOCAL7, "LOCAL7" },
  48                 { -1, NULL}
  49         };
  50
  51         int facility;
  52
  53         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  54
  55         return facility;
  56 }
  57
  58
  59 static int audit_syslog_priority(vfs_handle_struct *handle)
  60 {
  61         static const struct enum_list enum_log_priorities[] = {
  62                 { LOG_EMERG, "EMERG" },
  63                 { LOG_ALERT, "ALERT" },
  64                 { LOG_CRIT, "CRIT" },
  65                 { LOG_ERR, "ERR" },
  66                 { LOG_WARNING, "WARNING" },
  67                 { LOG_NOTICE, "NOTICE" },
  68                 { LOG_INFO, "INFO" },
  69                 { LOG_DEBUG, "DEBUG" },
  70                 { -1, NULL}
  71         };
  72
  73         int priority;
  74
  75         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
  76                                 enum_log_priorities, LOG_NOTICE);
  77         if (priority == -1) {
  78                 priority = LOG_WARNING;
  79         }
  80
  81         return priority;
  82 }
  83
  84 /* Implementation of vfs_ops.  Pass everything on to the default
  85    operation but log event first. */
  86
  87 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  88 {
  89         int result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  90
  91         if (result < 0) {
  92                 return result;
  93         }
  94
  95         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  96
  97         if (lp_syslog() > 0) {
  98                 syslog(audit_syslog_priority(handle),
  99                        "connect to service %s by user %s\n",
 100                        svc, user);
 101         }
 102         DEBUG(10, ("Connected to service %s as user %s\n",
 103                svc, user));
 104
 105         return 0;
 106 }
 107
 108 static void audit_disconnect(vfs_handle_struct *handle)
 109 {
 110         if (lp_syslog() > 0) {
 111                 syslog(audit_syslog_priority(handle), "disconnected\n");
 112         }
 113         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 114         SMB_VFS_NEXT_DISCONNECT(handle);
 115
 116         return;
 117 }
 118
 119 static DIR *audit_opendir(vfs_handle_struct *handle,
 120                         const struct smb_filename *smb_fname,
 121                         const char *mask,
 122                         uint32_t attr)
 123 {
 124         DIR *result;
 125
 126         result = SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 127
 128         if (lp_syslog() > 0) {
 129                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 130                        smb_fname->base_name,
 131                        (result == NULL) ? "failed: " : "",
 132                        (result == NULL) ? strerror(errno) : "");
 133         }
 134         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 135                smb_fname->base_name,
 136                (result == NULL) ? "failed: " : "",
 137                (result == NULL) ? strerror(errno) : ""));
 138
 139         return result;
 140 }
 141
 142 static int audit_mkdir(vfs_handle_struct *handle,
 143                         const struct smb_filename *smb_fname,
 144                         mode_t mode)
 145 {
 146         int result;
 147
 148         result = SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 149
 150         if (lp_syslog() > 0) {
 151                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 152                        smb_fname->base_name,
 153                        (result < 0) ? "failed: " : "",
 154                        (result < 0) ? strerror(errno) : "");
 155         }
 156         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 157                smb_fname->base_name,
 158                (result < 0) ? "failed: " : "",
 159                (result < 0) ? strerror(errno) : ""));
 160
 161         return result;
 162 }
 163
 164 static int audit_rmdir(vfs_handle_struct *handle,
 165                         const struct smb_filename *smb_fname)
 166 {
 167         int result;
 168
 169         result = SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 170
 171         if (lp_syslog() > 0) {
 172                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 173                        smb_fname->base_name,
 174                        (result < 0) ? "failed: " : "",
 175                        (result < 0) ? strerror(errno) : "");
 176         }
 177         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 178                smb_fname->base_name,
 179                (result < 0) ? "failed: " : "",
 180                (result < 0) ? strerror(errno) : ""));
 181
 182         return result;
 183 }
 184
 185 static int audit_open(vfs_handle_struct *handle,
 186                       struct smb_filename *smb_fname, files_struct *fsp,
 187                       int flags, mode_t mode)
 188 {
 189         int result;
 190
 191         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 192
 193         if (lp_syslog() > 0) {
 194                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 195                        smb_fname->base_name, result,
 196                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 197                        (result < 0) ? "failed: " : "",
 198                        (result < 0) ? strerror(errno) : "");
 199         }
 200         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 201                smb_fname_str_dbg(smb_fname),
 202                (result < 0) ? "failed: " : "",
 203                (result < 0) ? strerror(errno) : ""));
 204
 205         return result;
 206 }
 207
 208 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 209 {
 210         int result;
 211
 212         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 213
 214         if (lp_syslog() > 0) {
 215                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 216                        fsp->fh->fd,
 217                        (result < 0) ? "failed: " : "",
 218                        (result < 0) ? strerror(errno) : "");
 219         }
 220         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 221                fsp->fh->fd,
 222                (result < 0) ? "failed: " : "",
 223                (result < 0) ? strerror(errno) : ""));
 224
 225         return result;
 226 }
 227
 228 static int audit_rename(vfs_handle_struct *handle,
 229                         const struct smb_filename *smb_fname_src,
 230                         const struct smb_filename *smb_fname_dst)
 231 {
 232         int result;
 233
 234         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 235
 236         if (lp_syslog() > 0) {
 237                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 238                        smb_fname_src->base_name,
 239                        smb_fname_dst->base_name,
 240                        (result < 0) ? "failed: " : "",
 241                        (result < 0) ? strerror(errno) : "");
 242         }
 243         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 244                 smb_fname_str_dbg(smb_fname_src),
 245                 smb_fname_str_dbg(smb_fname_dst),
 246                (result < 0) ? "failed: " : "",
 247                (result < 0) ? strerror(errno) : ""));
 248
 249         return result;
 250 }
 251
 252 static int audit_unlink(vfs_handle_struct *handle,
 253                         const struct smb_filename *smb_fname)
 254 {
 255         int result;
 256
 257         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 258
 259         if (lp_syslog() > 0) {
 260                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 261                        smb_fname->base_name,
 262                        (result < 0) ? "failed: " : "",
 263                        (result < 0) ? strerror(errno) : "");
 264         }
 265         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 266                smb_fname_str_dbg(smb_fname),
 267                (result < 0) ? "failed: " : "",
 268                (result < 0) ? strerror(errno) : ""));
 269
 270         return result;
 271 }
 272
 273 static int audit_chmod(vfs_handle_struct *handle,
 274                         const struct smb_filename *smb_fname,
 275                         mode_t mode)
 276 {
 277         int result;
 278
 279         result = SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 280
 281         if (lp_syslog() > 0) {
 282                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 283                        smb_fname->base_name, mode,
 284                        (result < 0) ? "failed: " : "",
 285                        (result < 0) ? strerror(errno) : "");
 286         }
 287         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 288                smb_fname->base_name, (unsigned int)mode,
 289                (result < 0) ? "failed: " : "",
 290                (result < 0) ? strerror(errno) : ""));
 291
 292         return result;
 293 }
 294
 295 static int audit_chmod_acl(vfs_handle_struct *handle,
 296                         const struct smb_filename *smb_fname,
 297                         mode_t mode)
 298 {
 299         int result;
 300
 301         result = SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
 302
 303         if (lp_syslog() > 0) {
 304                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 305                        smb_fname->base_name, mode,
 306                        (result < 0) ? "failed: " : "",
 307                        (result < 0) ? strerror(errno) : "");
 308         }
 309         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 310                smb_fname->base_name, (unsigned int)mode,
 311                (result < 0) ? "failed: " : "",
 312                (result < 0) ? strerror(errno) : ""));
 313
 314         return result;
 315 }
 316
 317 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 318 {
 319         int result;
 320
 321         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 322
 323         if (lp_syslog() > 0) {
 324                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 325                        fsp->fsp_name->base_name, mode,
 326                        (result < 0) ? "failed: " : "",
 327                        (result < 0) ? strerror(errno) : "");
 328         }
 329         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 330                fsp_str_dbg(fsp), (unsigned int)mode,
 331                (result < 0) ? "failed: " : "",
 332                (result < 0) ? strerror(errno) : ""));
 333
 334         return result;
 335 }
 336
 337 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 338 {
 339         int result;
 340
 341         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 342
 343         if (lp_syslog() > 0) {
 344                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 345                        fsp->fsp_name->base_name, mode,
 346                        (result < 0) ? "failed: " : "",
 347                        (result < 0) ? strerror(errno) : "");
 348         }
 349         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 350                 fsp_str_dbg(fsp),  (unsigned int)mode,
 351                (result < 0) ? "failed: " : "",
 352                (result < 0) ? strerror(errno) : ""));
 353
 354         return result;
 355 }
 356
 357 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 358         .connect_fn = audit_connect,
 359         .disconnect_fn = audit_disconnect,
 360         .opendir_fn = audit_opendir,
 361         .mkdir_fn = audit_mkdir,
 362         .rmdir_fn = audit_rmdir,
 363         .open_fn = audit_open,
 364         .close_fn = audit_close,
 365         .rename_fn = audit_rename,
 366         .unlink_fn = audit_unlink,
 367         .chmod_fn = audit_chmod,
 368         .fchmod_fn = audit_fchmod,
 369         .chmod_acl_fn = audit_chmod_acl,
 370         .fchmod_acl_fn = audit_fchmod_acl,
 371 };
 372
 373 static_decl_vfs;
 374 NTSTATUS vfs_extd_audit_init(TALLOC_CTX *ctx)
 375 {
 376         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 377                                         "extd_audit", &vfs_extd_audit_fns);
 378
 379         if (!NT_STATUS_IS_OK(ret))
 380                 return ret;
 381
 382         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 383         if (vfs_extd_audit_debug_level == -1) {
 384                 vfs_extd_audit_debug_level = DBGC_VFS;
 385                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 386         } else {
 387                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 388         }
 389
 390         return ret;
 391 }