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 #ifdef LOG_AUTH
  40                 { LOG_AUTH,             "AUTH" },
  41 #endif
  42 #ifdef LOG_AUTHPRIV
  43                 { LOG_AUTHPRIV,         "AUTHPRIV" },
  44 #endif
  45 #ifdef LOG_AUDIT
  46                 { LOG_AUDIT,            "AUDIT" },
  47 #endif
  48 #ifdef LOG_CONSOLE
  49                 { LOG_CONSOLE,          "CONSOLE" },
  50 #endif
  51 #ifdef LOG_CRON
  52                 { LOG_CRON,             "CRON" },
  53 #endif
  54 #ifdef LOG_DAEMON
  55                 { LOG_DAEMON,           "DAEMON" },
  56 #endif
  57 #ifdef LOG_FTP
  58                 { LOG_FTP,              "FTP" },
  59 #endif
  60 #ifdef LOG_INSTALL
  61                 { LOG_INSTALL,          "INSTALL" },
  62 #endif
  63 #ifdef LOG_KERN
  64                 { LOG_KERN,             "KERN" },
  65 #endif
  66 #ifdef LOG_LAUNCHD
  67                 { LOG_LAUNCHD,          "LAUNCHD" },
  68 #endif
  69 #ifdef LOG_LFMT
  70                 { LOG_LFMT,             "LFMT" },
  71 #endif
  72 #ifdef LOG_LPR
  73                 { LOG_LPR,              "LPR" },
  74 #endif
  75 #ifdef LOG_MAIL
  76                 { LOG_MAIL,             "MAIL" },
  77 #endif
  78 #ifdef LOG_MEGASAFE
  79                 { LOG_MEGASAFE,         "MEGASAFE" },
  80 #endif
  81 #ifdef LOG_NETINFO
  82                 { LOG_NETINFO,          "NETINFO" },
  83 #endif
  84 #ifdef LOG_NEWS
  85                 { LOG_NEWS,             "NEWS" },
  86 #endif
  87 #ifdef LOG_NFACILITIES
  88                 { LOG_NFACILITIES,      "NFACILITIES" },
  89 #endif
  90 #ifdef LOG_NTP
  91                 { LOG_NTP,              "NTP" },
  92 #endif
  93 #ifdef LOG_RAS
  94                 { LOG_RAS,              "RAS" },
  95 #endif
  96 #ifdef LOG_REMOTEAUTH
  97                 { LOG_REMOTEAUTH,       "REMOTEAUTH" },
  98 #endif
  99 #ifdef LOG_SECURITY
 100                 { LOG_SECURITY,         "SECURITY" },
 101 #endif
 102 #ifdef LOG_SYSLOG
 103                 { LOG_SYSLOG,           "SYSLOG" },
 104 #endif
 105 #ifdef LOG_USER
 106                 { LOG_USER,             "USER" },
 107 #endif
 108 #ifdef LOG_UUCP
 109                 { LOG_UUCP,             "UUCP" },
 110 #endif
 111                 { LOG_LOCAL0,           "LOCAL0" },
 112                 { LOG_LOCAL1,           "LOCAL1" },
 113                 { LOG_LOCAL2,           "LOCAL2" },
 114                 { LOG_LOCAL3,           "LOCAL3" },
 115                 { LOG_LOCAL4,           "LOCAL4" },
 116                 { LOG_LOCAL5,           "LOCAL5" },
 117                 { LOG_LOCAL6,           "LOCAL6" },
 118                 { LOG_LOCAL7,           "LOCAL7" },
 119                 { -1,                   NULL }
 120         };
 121
 122         int facility;
 123
 124         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
 125
 126         return facility;
 127 }
 128
 129
 130 static int audit_syslog_priority(vfs_handle_struct *handle)
 131 {
 132         static const struct enum_list enum_log_priorities[] = {
 133                 { LOG_EMERG, "EMERG" },
 134                 { LOG_ALERT, "ALERT" },
 135                 { LOG_CRIT, "CRIT" },
 136                 { LOG_ERR, "ERR" },
 137                 { LOG_WARNING, "WARNING" },
 138                 { LOG_NOTICE, "NOTICE" },
 139                 { LOG_INFO, "INFO" },
 140                 { LOG_DEBUG, "DEBUG" },
 141                 { -1, NULL }
 142         };
 143
 144         int priority;
 145
 146         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
 147                                 enum_log_priorities, LOG_NOTICE);
 148         if (priority == -1) {
 149                 priority = LOG_WARNING;
 150         }
 151
 152         return priority;
 153 }
 154
 155 /* Implementation of vfs_ops.  Pass everything on to the default
 156    operation but log event first. */
 157
 158 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 159 {
 160         int result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 161
 162         if (result < 0) {
 163                 return result;
 164         }
 165
 166         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 167
 168         if (lp_syslog() > 0) {
 169                 syslog(audit_syslog_priority(handle),
 170                        "connect to service %s by user %s\n",
 171                        svc, user);
 172         }
 173         DEBUG(10, ("Connected to service %s as user %s\n",
 174                svc, user));
 175
 176         return 0;
 177 }
 178
 179 static void audit_disconnect(vfs_handle_struct *handle)
 180 {
 181         if (lp_syslog() > 0) {
 182                 syslog(audit_syslog_priority(handle), "disconnected\n");
 183         }
 184         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 185         SMB_VFS_NEXT_DISCONNECT(handle);
 186
 187         return;
 188 }
 189
 190 static DIR *audit_opendir(vfs_handle_struct *handle,
 191                         const struct smb_filename *smb_fname,
 192                         const char *mask,
 193                         uint32_t attr)
 194 {
 195         DIR *result;
 196
 197         result = SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 198
 199         if (lp_syslog() > 0) {
 200                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 201                        smb_fname->base_name,
 202                        (result == NULL) ? "failed: " : "",
 203                        (result == NULL) ? strerror(errno) : "");
 204         }
 205         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 206                smb_fname->base_name,
 207                (result == NULL) ? "failed: " : "",
 208                (result == NULL) ? strerror(errno) : ""));
 209
 210         return result;
 211 }
 212
 213 static int audit_mkdir(vfs_handle_struct *handle,
 214                         const struct smb_filename *smb_fname,
 215                         mode_t mode)
 216 {
 217         int result;
 218
 219         result = SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 220
 221         if (lp_syslog() > 0) {
 222                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 223                        smb_fname->base_name,
 224                        (result < 0) ? "failed: " : "",
 225                        (result < 0) ? strerror(errno) : "");
 226         }
 227         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 228                smb_fname->base_name,
 229                (result < 0) ? "failed: " : "",
 230                (result < 0) ? strerror(errno) : ""));
 231
 232         return result;
 233 }
 234
 235 static int audit_rmdir(vfs_handle_struct *handle,
 236                         const struct smb_filename *smb_fname)
 237 {
 238         int result;
 239
 240         result = SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 241
 242         if (lp_syslog() > 0) {
 243                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 244                        smb_fname->base_name,
 245                        (result < 0) ? "failed: " : "",
 246                        (result < 0) ? strerror(errno) : "");
 247         }
 248         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 249                smb_fname->base_name,
 250                (result < 0) ? "failed: " : "",
 251                (result < 0) ? strerror(errno) : ""));
 252
 253         return result;
 254 }
 255
 256 static int audit_open(vfs_handle_struct *handle,
 257                       struct smb_filename *smb_fname, files_struct *fsp,
 258                       int flags, mode_t mode)
 259 {
 260         int result;
 261
 262         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 263
 264         if (lp_syslog() > 0) {
 265                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 266                        smb_fname->base_name, result,
 267                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 268                        (result < 0) ? "failed: " : "",
 269                        (result < 0) ? strerror(errno) : "");
 270         }
 271         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 272                smb_fname_str_dbg(smb_fname),
 273                (result < 0) ? "failed: " : "",
 274                (result < 0) ? strerror(errno) : ""));
 275
 276         return result;
 277 }
 278
 279 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 280 {
 281         int result;
 282
 283         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 284
 285         if (lp_syslog() > 0) {
 286                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 287                        fsp->fh->fd,
 288                        (result < 0) ? "failed: " : "",
 289                        (result < 0) ? strerror(errno) : "");
 290         }
 291         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 292                fsp->fh->fd,
 293                (result < 0) ? "failed: " : "",
 294                (result < 0) ? strerror(errno) : ""));
 295
 296         return result;
 297 }
 298
 299 static int audit_rename(vfs_handle_struct *handle,
 300                         const struct smb_filename *smb_fname_src,
 301                         const struct smb_filename *smb_fname_dst)
 302 {
 303         int result;
 304
 305         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 306
 307         if (lp_syslog() > 0) {
 308                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 309                        smb_fname_src->base_name,
 310                        smb_fname_dst->base_name,
 311                        (result < 0) ? "failed: " : "",
 312                        (result < 0) ? strerror(errno) : "");
 313         }
 314         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 315                 smb_fname_str_dbg(smb_fname_src),
 316                 smb_fname_str_dbg(smb_fname_dst),
 317                (result < 0) ? "failed: " : "",
 318                (result < 0) ? strerror(errno) : ""));
 319
 320         return result;
 321 }
 322
 323 static int audit_unlink(vfs_handle_struct *handle,
 324                         const struct smb_filename *smb_fname)
 325 {
 326         int result;
 327
 328         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 329
 330         if (lp_syslog() > 0) {
 331                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 332                        smb_fname->base_name,
 333                        (result < 0) ? "failed: " : "",
 334                        (result < 0) ? strerror(errno) : "");
 335         }
 336         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 337                smb_fname_str_dbg(smb_fname),
 338                (result < 0) ? "failed: " : "",
 339                (result < 0) ? strerror(errno) : ""));
 340
 341         return result;
 342 }
 343
 344 static int audit_chmod(vfs_handle_struct *handle,
 345                         const struct smb_filename *smb_fname,
 346                         mode_t mode)
 347 {
 348         int result;
 349
 350         result = SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 351
 352         if (lp_syslog() > 0) {
 353                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 354                        smb_fname->base_name, mode,
 355                        (result < 0) ? "failed: " : "",
 356                        (result < 0) ? strerror(errno) : "");
 357         }
 358         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 359                smb_fname->base_name, (unsigned int)mode,
 360                (result < 0) ? "failed: " : "",
 361                (result < 0) ? strerror(errno) : ""));
 362
 363         return result;
 364 }
 365
 366 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 367 {
 368         int result;
 369
 370         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 371
 372         if (lp_syslog() > 0) {
 373                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 374                        fsp->fsp_name->base_name, mode,
 375                        (result < 0) ? "failed: " : "",
 376                        (result < 0) ? strerror(errno) : "");
 377         }
 378         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 379                fsp_str_dbg(fsp), (unsigned int)mode,
 380                (result < 0) ? "failed: " : "",
 381                (result < 0) ? strerror(errno) : ""));
 382
 383         return result;
 384 }
 385
 386 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 387         .connect_fn = audit_connect,
 388         .disconnect_fn = audit_disconnect,
 389         .opendir_fn = audit_opendir,
 390         .mkdir_fn = audit_mkdir,
 391         .rmdir_fn = audit_rmdir,
 392         .open_fn = audit_open,
 393         .close_fn = audit_close,
 394         .rename_fn = audit_rename,
 395         .unlink_fn = audit_unlink,
 396         .chmod_fn = audit_chmod,
 397         .fchmod_fn = audit_fchmod,
 398 };
 399
 400 static_decl_vfs;
 401 NTSTATUS vfs_extd_audit_init(TALLOC_CTX *ctx)
 402 {
 403         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 404                                         "extd_audit", &vfs_extd_audit_fns);
 405
 406         if (!NT_STATUS_IS_OK(ret))
 407                 return ret;
 408
 409         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 410         if (vfs_extd_audit_debug_level == -1) {
 411                 vfs_extd_audit_debug_level = DBGC_VFS;
 412                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 413         } else {
 414                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 415         }
 416
 417         return ret;
 418 }