source/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         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
 136                svc, user);
 137         DEBUG(10, ("Connected to service %s as user %s\n",
 138                svc, user));
 139
 140         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 141
 142         return result;
 143 }
 144
 145 static void audit_disconnect(vfs_handle_struct *handle)
 146 {
 147         syslog(audit_syslog_priority(handle), "disconnected\n");
 148         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 149         SMB_VFS_NEXT_DISCONNECT(handle);
 150
 151         return;
 152 }
 153
 154 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 155 {
 156         SMB_STRUCT_DIR *result;
 157
 158         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 159
 160         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 161                fname,
 162                (result == NULL) ? "failed: " : "",
 163                (result == NULL) ? strerror(errno) : "");
 164         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 165                fname,
 166                (result == NULL) ? "failed: " : "",
 167                (result == NULL) ? strerror(errno) : ""));
 168
 169         return result;
 170 }
 171
 172 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 173 {
 174         int result;
 175
 176         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 177
 178         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 179                path,
 180                (result < 0) ? "failed: " : "",
 181                (result < 0) ? strerror(errno) : "");
 182         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 183                path,
 184                (result < 0) ? "failed: " : "",
 185                (result < 0) ? strerror(errno) : ""));
 186
 187         return result;
 188 }
 189
 190 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 191 {
 192         int result;
 193
 194         result = SMB_VFS_NEXT_RMDIR(handle, path);
 195
 196         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 197                path,
 198                (result < 0) ? "failed: " : "",
 199                (result < 0) ? strerror(errno) : "");
 200         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 201                path,
 202                (result < 0) ? "failed: " : "",
 203                (result < 0) ? strerror(errno) : ""));
 204
 205         return result;
 206 }
 207
 208 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
 209 {
 210         int result;
 211
 212         result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 213
 214         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 215                fname, result,
 216                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 217                (result < 0) ? "failed: " : "",
 218                (result < 0) ? strerror(errno) : "");
 219         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 220                fname,
 221                (result < 0) ? "failed: " : "",
 222                (result < 0) ? strerror(errno) : ""));
 223
 224         return result;
 225 }
 226
 227 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 228 {
 229         int result;
 230
 231         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 232
 233         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 234                fsp->fh->fd,
 235                (result < 0) ? "failed: " : "",
 236                (result < 0) ? strerror(errno) : "");
 237         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 238                fsp->fh->fd,
 239                (result < 0) ? "failed: " : "",
 240                (result < 0) ? strerror(errno) : ""));
 241
 242         return result;
 243 }
 244
 245 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
 246 {
 247         int result;
 248
 249         result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
 250
 251         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 252                oldname, newname,
 253                (result < 0) ? "failed: " : "",
 254                (result < 0) ? strerror(errno) : "");
 255         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 256                oldname, newname,
 257                (result < 0) ? "failed: " : "",
 258                (result < 0) ? strerror(errno) : ""));
 259
 260         return result;
 261 }
 262
 263 static int audit_unlink(vfs_handle_struct *handle, const char *path)
 264 {
 265         int result;
 266
 267         result = SMB_VFS_NEXT_UNLINK(handle, path);
 268
 269         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 270                path,
 271                (result < 0) ? "failed: " : "",
 272                (result < 0) ? strerror(errno) : "");
 273         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 274                path,
 275                (result < 0) ? "failed: " : "",
 276                (result < 0) ? strerror(errno) : ""));
 277
 278         return result;
 279 }
 280
 281 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 282 {
 283         int result;
 284
 285         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 286
 287         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 288                path, mode,
 289                (result < 0) ? "failed: " : "",
 290                (result < 0) ? strerror(errno) : "");
 291         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 292                path, (unsigned int)mode,
 293                (result < 0) ? "failed: " : "",
 294                (result < 0) ? strerror(errno) : ""));
 295
 296         return result;
 297 }
 298
 299 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 300 {
 301         int result;
 302
 303         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 304
 305         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 306                path, mode,
 307                (result < 0) ? "failed: " : "",
 308                (result < 0) ? strerror(errno) : "");
 309         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 310                 path, (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         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 324                fsp->fsp_name, mode,
 325                (result < 0) ? "failed: " : "",
 326                (result < 0) ? strerror(errno) : "");
 327         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 328                fsp->fsp_name,  (unsigned int)mode,
 329                (result < 0) ? "failed: " : "",
 330                (result < 0) ? strerror(errno) : ""));
 331
 332         return result;
 333 }
 334
 335 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 336 {
 337         int result;
 338
 339         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 340
 341         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 342                fsp->fsp_name, mode,
 343                (result < 0) ? "failed: " : "",
 344                (result < 0) ? strerror(errno) : "");
 345         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 346                fsp->fsp_name,  (unsigned int)mode,
 347                (result < 0) ? "failed: " : "",
 348                (result < 0) ? strerror(errno) : ""));
 349
 350         return result;
 351 }
 352
 353 NTSTATUS vfs_extd_audit_init(void);
 354 NTSTATUS vfs_extd_audit_init(void)
 355 {
 356         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 357
 358         if (!NT_STATUS_IS_OK(ret))
 359                 return ret;
 360
 361         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 362         if (vfs_extd_audit_debug_level == -1) {
 363                 vfs_extd_audit_debug_level = DBGC_VFS;
 364                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 365         } else {
 366                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 367         }
 368
 369         return ret;
 370 }