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, int fd);
  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", enum_log_priorities, LOG_NOTICE);
 118
 119         return priority;
 120 }
 121
 122 /* Implementation of vfs_ops.  Pass everything on to the default
 123    operation but log event first. */
 124
 125 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 126 {
 127         int result;
 128
 129         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 130
 131         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
 132                svc, user);
 133         DEBUG(10, ("Connected to service %s as user %s\n",
 134                svc, user));
 135
 136         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 137
 138         return result;
 139 }
 140
 141 static void audit_disconnect(vfs_handle_struct *handle)
 142 {
 143         syslog(audit_syslog_priority(handle), "disconnected\n");
 144         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 145         SMB_VFS_NEXT_DISCONNECT(handle);
 146
 147         return;
 148 }
 149
 150 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 151 {
 152         SMB_STRUCT_DIR *result;
 153
 154         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 155
 156         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 157                fname,
 158                (result == NULL) ? "failed: " : "",
 159                (result == NULL) ? strerror(errno) : "");
 160         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 161                fname,
 162                (result == NULL) ? "failed: " : "",
 163                (result == NULL) ? strerror(errno) : ""));
 164
 165         return result;
 166 }
 167
 168 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 169 {
 170         int result;
 171
 172         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 173
 174         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 175                path,
 176                (result < 0) ? "failed: " : "",
 177                (result < 0) ? strerror(errno) : "");
 178         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 179                path,
 180                (result < 0) ? "failed: " : "",
 181                (result < 0) ? strerror(errno) : ""));
 182
 183         return result;
 184 }
 185
 186 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 187 {
 188         int result;
 189
 190         result = SMB_VFS_NEXT_RMDIR(handle, path);
 191
 192         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 193                path,
 194                (result < 0) ? "failed: " : "",
 195                (result < 0) ? strerror(errno) : "");
 196         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 197                path,
 198                (result < 0) ? "failed: " : "",
 199                (result < 0) ? strerror(errno) : ""));
 200
 201         return result;
 202 }
 203
 204 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
 205 {
 206         int result;
 207
 208         result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 209
 210         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 211                fname, result,
 212                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 213                (result < 0) ? "failed: " : "",
 214                (result < 0) ? strerror(errno) : "");
 215         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 216                fname,
 217                (result < 0) ? "failed: " : "",
 218                (result < 0) ? strerror(errno) : ""));
 219
 220         return result;
 221 }
 222
 223 static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
 224 {
 225         int result;
 226
 227         result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
 228
 229         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 230                fd,
 231                (result < 0) ? "failed: " : "",
 232                (result < 0) ? strerror(errno) : "");
 233         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 234                fd,
 235                (result < 0) ? "failed: " : "",
 236                (result < 0) ? strerror(errno) : ""));
 237
 238         return result;
 239 }
 240
 241 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
 242 {
 243         int result;
 244
 245         result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
 246
 247         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 248                oldname, newname,
 249                (result < 0) ? "failed: " : "",
 250                (result < 0) ? strerror(errno) : "");
 251         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 252                oldname, newname,
 253                (result < 0) ? "failed: " : "",
 254                (result < 0) ? strerror(errno) : ""));
 255
 256         return result;
 257 }
 258
 259 static int audit_unlink(vfs_handle_struct *handle, const char *path)
 260 {
 261         int result;
 262
 263         result = SMB_VFS_NEXT_UNLINK(handle, path);
 264
 265         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 266                path,
 267                (result < 0) ? "failed: " : "",
 268                (result < 0) ? strerror(errno) : "");
 269         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 270                path,
 271                (result < 0) ? "failed: " : "",
 272                (result < 0) ? strerror(errno) : ""));
 273
 274         return result;
 275 }
 276
 277 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 278 {
 279         int result;
 280
 281         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 282
 283         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 284                path, mode,
 285                (result < 0) ? "failed: " : "",
 286                (result < 0) ? strerror(errno) : "");
 287         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 288                path, 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, const char *path, mode_t mode)
 296 {
 297         int result;
 298
 299         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 300
 301         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 302                path, mode,
 303                (result < 0) ? "failed: " : "",
 304                (result < 0) ? strerror(errno) : "");
 305         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 306                 path, mode,
 307                (result < 0) ? "failed: " : "",
 308                (result < 0) ? strerror(errno) : ""));
 309
 310         return result;
 311 }
 312
 313 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 314 {
 315         int result;
 316
 317         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 318
 319         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 320                fsp->fsp_name, mode,
 321                (result < 0) ? "failed: " : "",
 322                (result < 0) ? strerror(errno) : "");
 323         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 324                fsp->fsp_name,  mode,
 325                (result < 0) ? "failed: " : "",
 326                (result < 0) ? strerror(errno) : ""));
 327
 328         return result;
 329 }
 330
 331 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 332 {
 333         int result;
 334
 335         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 336
 337         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 338                fsp->fsp_name, mode,
 339                (result < 0) ? "failed: " : "",
 340                (result < 0) ? strerror(errno) : "");
 341         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 342                fsp->fsp_name,  mode,
 343                (result < 0) ? "failed: " : "",
 344                (result < 0) ? strerror(errno) : ""));
 345
 346         return result;
 347 }
 348
 349 NTSTATUS vfs_extd_audit_init(void);
 350 NTSTATUS vfs_extd_audit_init(void)
 351 {
 352         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 353
 354         if (!NT_STATUS_IS_OK(ret))
 355                 return ret;
 356
 357         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 358         if (vfs_extd_audit_debug_level == -1) {
 359                 vfs_extd_audit_debug_level = DBGC_VFS;
 360                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 361         } else {
 362                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 363         }
 364
 365         return ret;
 366 }