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 2 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, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25
  26 #include "includes.h"
  27
  28 static int vfs_extd_audit_debug_level = DBGC_VFS;
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS vfs_extd_audit_debug_level
  32
  33 /* Function prototypes */
  34
  35 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
  36 static void audit_disconnect(vfs_handle_struct *handle);
  37 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
  38 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
  39 static int audit_rmdir(vfs_handle_struct *handle, const char *path);
  40 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
  41 static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd);
  42 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
  43 static int audit_unlink(vfs_handle_struct *handle, const char *path);
  44 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
  45 static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
  46 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
  47 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode);
  48
  49 /* VFS operations */
  50
  51 static vfs_op_tuple audit_op_tuples[] = {
  52
  53         /* Disk operations */
  54
  55         {SMB_VFS_OP(audit_connect),     SMB_VFS_OP_CONNECT,     SMB_VFS_LAYER_LOGGER},
  56         {SMB_VFS_OP(audit_disconnect),  SMB_VFS_OP_DISCONNECT,  SMB_VFS_LAYER_LOGGER},
  57
  58         /* Directory operations */
  59
  60         {SMB_VFS_OP(audit_opendir),     SMB_VFS_OP_OPENDIR,     SMB_VFS_LAYER_LOGGER},
  61         {SMB_VFS_OP(audit_mkdir),               SMB_VFS_OP_MKDIR,       SMB_VFS_LAYER_LOGGER},
  62         {SMB_VFS_OP(audit_rmdir),               SMB_VFS_OP_RMDIR,       SMB_VFS_LAYER_LOGGER},
  63
  64         /* File operations */
  65
  66         {SMB_VFS_OP(audit_open),                SMB_VFS_OP_OPEN,        SMB_VFS_LAYER_LOGGER},
  67         {SMB_VFS_OP(audit_close),               SMB_VFS_OP_CLOSE,       SMB_VFS_LAYER_LOGGER},
  68         {SMB_VFS_OP(audit_rename),              SMB_VFS_OP_RENAME,      SMB_VFS_LAYER_LOGGER},
  69         {SMB_VFS_OP(audit_unlink),              SMB_VFS_OP_UNLINK,      SMB_VFS_LAYER_LOGGER},
  70         {SMB_VFS_OP(audit_chmod),               SMB_VFS_OP_CHMOD,       SMB_VFS_LAYER_LOGGER},
  71         {SMB_VFS_OP(audit_fchmod),              SMB_VFS_OP_FCHMOD,      SMB_VFS_LAYER_LOGGER},
  72         {SMB_VFS_OP(audit_chmod_acl),   SMB_VFS_OP_CHMOD_ACL,   SMB_VFS_LAYER_LOGGER},
  73         {SMB_VFS_OP(audit_fchmod_acl),  SMB_VFS_OP_FCHMOD_ACL,  SMB_VFS_LAYER_LOGGER},
  74
  75         /* Finish VFS operations definition */
  76
  77         {SMB_VFS_OP(NULL),                      SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
  78 };
  79
  80
  81 static int audit_syslog_facility(vfs_handle_struct *handle)
  82 {
  83         static const struct enum_list enum_log_facilities[] = {
  84                 { LOG_USER, "USER" },
  85                 { LOG_LOCAL0, "LOCAL0" },
  86                 { LOG_LOCAL1, "LOCAL1" },
  87                 { LOG_LOCAL2, "LOCAL2" },
  88                 { LOG_LOCAL3, "LOCAL3" },
  89                 { LOG_LOCAL4, "LOCAL4" },
  90                 { LOG_LOCAL5, "LOCAL5" },
  91                 { LOG_LOCAL6, "LOCAL6" },
  92                 { LOG_LOCAL7, "LOCAL7" }
  93         };
  94
  95         int facility;
  96
  97         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  98
  99         return facility;
 100 }
 101
 102
 103 static int audit_syslog_priority(vfs_handle_struct *handle)
 104 {
 105         static const struct enum_list enum_log_priorities[] = {
 106                 { LOG_EMERG, "EMERG" },
 107                 { LOG_ALERT, "ALERT" },
 108                 { LOG_CRIT, "CRIT" },
 109                 { LOG_ERR, "ERR" },
 110                 { LOG_WARNING, "WARNING" },
 111                 { LOG_NOTICE, "NOTICE" },
 112                 { LOG_INFO, "INFO" },
 113                 { LOG_DEBUG, "DEBUG" }
 114         };
 115
 116         int priority;
 117
 118         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority", enum_log_priorities, LOG_NOTICE);
 119
 120         return priority;
 121 }
 122
 123 /* Implementation of vfs_ops.  Pass everything on to the default
 124    operation but log event first. */
 125
 126 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 127 {
 128         int result;
 129
 130         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 131
 132         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
 133                svc, user);
 134         DEBUG(10, ("Connected to service %s as user %s\n",
 135                svc, user));
 136
 137         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 138
 139         return result;
 140 }
 141
 142 static void audit_disconnect(vfs_handle_struct *handle)
 143 {
 144         syslog(audit_syslog_priority(handle), "disconnected\n");
 145         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 146         SMB_VFS_NEXT_DISCONNECT(handle);
 147
 148         return;
 149 }
 150
 151 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 152 {
 153         SMB_STRUCT_DIR *result;
 154
 155         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 156
 157         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 158                fname,
 159                (result == NULL) ? "failed: " : "",
 160                (result == NULL) ? strerror(errno) : "");
 161         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 162                fname,
 163                (result == NULL) ? "failed: " : "",
 164                (result == NULL) ? strerror(errno) : ""));
 165
 166         return result;
 167 }
 168
 169 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 170 {
 171         int result;
 172
 173         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 174
 175         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 176                path,
 177                (result < 0) ? "failed: " : "",
 178                (result < 0) ? strerror(errno) : "");
 179         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 180                path,
 181                (result < 0) ? "failed: " : "",
 182                (result < 0) ? strerror(errno) : ""));
 183
 184         return result;
 185 }
 186
 187 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 188 {
 189         int result;
 190
 191         result = SMB_VFS_NEXT_RMDIR(handle, path);
 192
 193         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 194                path,
 195                (result < 0) ? "failed: " : "",
 196                (result < 0) ? strerror(errno) : "");
 197         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 198                path,
 199                (result < 0) ? "failed: " : "",
 200                (result < 0) ? strerror(errno) : ""));
 201
 202         return result;
 203 }
 204
 205 static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
 206 {
 207         int result;
 208
 209         result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 210
 211         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 212                fname, result,
 213                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 214                (result < 0) ? "failed: " : "",
 215                (result < 0) ? strerror(errno) : "");
 216         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 217                fname,
 218                (result < 0) ? "failed: " : "",
 219                (result < 0) ? strerror(errno) : ""));
 220
 221         return result;
 222 }
 223
 224 static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
 225 {
 226         int result;
 227
 228         result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
 229
 230         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 231                fd,
 232                (result < 0) ? "failed: " : "",
 233                (result < 0) ? strerror(errno) : "");
 234         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 235                fd,
 236                (result < 0) ? "failed: " : "",
 237                (result < 0) ? strerror(errno) : ""));
 238
 239         return result;
 240 }
 241
 242 static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
 243 {
 244         int result;
 245
 246         result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
 247
 248         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 249                oldname, newname,
 250                (result < 0) ? "failed: " : "",
 251                (result < 0) ? strerror(errno) : "");
 252         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 253                oldname, newname,
 254                (result < 0) ? "failed: " : "",
 255                (result < 0) ? strerror(errno) : ""));
 256
 257         return result;
 258 }
 259
 260 static int audit_unlink(vfs_handle_struct *handle, const char *path)
 261 {
 262         int result;
 263
 264         result = SMB_VFS_NEXT_UNLINK(handle, path);
 265
 266         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 267                path,
 268                (result < 0) ? "failed: " : "",
 269                (result < 0) ? strerror(errno) : "");
 270         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 271                path,
 272                (result < 0) ? "failed: " : "",
 273                (result < 0) ? strerror(errno) : ""));
 274
 275         return result;
 276 }
 277
 278 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 279 {
 280         int result;
 281
 282         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 283
 284         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 285                path, mode,
 286                (result < 0) ? "failed: " : "",
 287                (result < 0) ? strerror(errno) : "");
 288         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 289                path, mode,
 290                (result < 0) ? "failed: " : "",
 291                (result < 0) ? strerror(errno) : ""));
 292
 293         return result;
 294 }
 295
 296 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 297 {
 298         int result;
 299
 300         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 301
 302         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 303                path, mode,
 304                (result < 0) ? "failed: " : "",
 305                (result < 0) ? strerror(errno) : "");
 306         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 307                 path, mode,
 308                (result < 0) ? "failed: " : "",
 309                (result < 0) ? strerror(errno) : ""));
 310
 311         return result;
 312 }
 313
 314 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
 315 {
 316         int result;
 317
 318         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, fd, mode);
 319
 320         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 321                fsp->fsp_name, mode,
 322                (result < 0) ? "failed: " : "",
 323                (result < 0) ? strerror(errno) : "");
 324         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 325                fsp->fsp_name,  mode,
 326                (result < 0) ? "failed: " : "",
 327                (result < 0) ? strerror(errno) : ""));
 328
 329         return result;
 330 }
 331
 332 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
 333 {
 334         int result;
 335
 336         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, fd, mode);
 337
 338         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 339                fsp->fsp_name, mode,
 340                (result < 0) ? "failed: " : "",
 341                (result < 0) ? strerror(errno) : "");
 342         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 343                fsp->fsp_name,  mode,
 344                (result < 0) ? "failed: " : "",
 345                (result < 0) ? strerror(errno) : ""));
 346
 347         return result;
 348 }
 349
 350 NTSTATUS vfs_extd_audit_init(void);
 351 NTSTATUS vfs_extd_audit_init(void)
 352 {
 353         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 354
 355         if (!NT_STATUS_IS_OK(ret))
 356                 return ret;
 357
 358         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 359         if (vfs_extd_audit_debug_level == -1) {
 360                 vfs_extd_audit_debug_level = DBGC_VFS;
 361                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 362         } else {
 363                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 364         }
 365
 366         return ret;
 367 }