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 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, connection_struct *conn, const char *svc, const char *user);
  36 static void audit_disconnect(vfs_handle_struct *handle, connection_struct *conn);
  37 static DIR *audit_opendir(vfs_handle_struct *handle, connection_struct *conn, const char *fname);
  38 static int audit_mkdir(vfs_handle_struct *handle, connection_struct *conn, const char *path, mode_t mode);
  39 static int audit_rmdir(vfs_handle_struct *handle, connection_struct *conn, const char *path);
  40 static int audit_open(vfs_handle_struct *handle, connection_struct *conn, const char *fname, 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, connection_struct *conn, const char *old, const char *new);
  43 static int audit_unlink(vfs_handle_struct *handle, connection_struct *conn, const char *path);
  44 static int audit_chmod(vfs_handle_struct *handle, connection_struct *conn, const char *path, mode_t mode);
  45 static int audit_chmod_acl(vfs_handle_struct *handle, connection_struct *conn, 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         /* fix me: let this be configurable by:
  84          *      lp_param_enum(SNUM(handle->conn),(handle->param?handle->param:"extd_audit"),"syslog facility",
  85          *              audit_enum_facility,LOG_USER);
  86          */
  87         return LOG_USER;
  88 }
  89
  90
  91 static int audit_syslog_priority(vfs_handle_struct *handle)
  92 {
  93         /* fix me: let this be configurable by:
  94          *      lp_param_enum(SNUM(handle->conn),(handle->param?handle->param:"extd_audit"),"syslog priority",
  95          *              audit_enum_priority,LOG_NOTICE);
  96          */
  97         return LOG_NOTICE;
  98 }
  99
 100 /* Implementation of vfs_ops.  Pass everything on to the default
 101    operation but log event first. */
 102
 103 static int audit_connect(vfs_handle_struct *handle, connection_struct *conn, const char *svc, const char *user)
 104 {
 105         int result;
 106
 107         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 108
 109         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
 110                svc, user);
 111         DEBUG(10, ("Connected to service %s as user %s\n",
 112                svc, user));
 113
 114         result = SMB_VFS_NEXT_CONNECT(handle, conn, svc, user);
 115
 116         return result;
 117 }
 118
 119 static void audit_disconnect(vfs_handle_struct *handle, connection_struct *conn)
 120 {
 121         syslog(audit_syslog_priority(handle), "disconnected\n");
 122         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 123         SMB_VFS_NEXT_DISCONNECT(handle, conn);
 124
 125         return;
 126 }
 127
 128 static DIR *audit_opendir(vfs_handle_struct *handle, connection_struct *conn, const char *fname)
 129 {
 130         DIR *result;
 131
 132         result = SMB_VFS_NEXT_OPENDIR(handle, conn, fname);
 133
 134         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 135                fname,
 136                (result == NULL) ? "failed: " : "",
 137                (result == NULL) ? strerror(errno) : "");
 138         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 139                fname,
 140                (result == NULL) ? "failed: " : "",
 141                (result == NULL) ? strerror(errno) : ""));
 142
 143         return result;
 144 }
 145
 146 static int audit_mkdir(vfs_handle_struct *handle, connection_struct *conn, const char *path, mode_t mode)
 147 {
 148         int result;
 149
 150         result = SMB_VFS_NEXT_MKDIR(handle, conn, path, mode);
 151
 152         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 153                path,
 154                (result < 0) ? "failed: " : "",
 155                (result < 0) ? strerror(errno) : "");
 156         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 157                path,
 158                (result < 0) ? "failed: " : "",
 159                (result < 0) ? strerror(errno) : ""));
 160
 161         return result;
 162 }
 163
 164 static int audit_rmdir(vfs_handle_struct *handle, connection_struct *conn, const char *path)
 165 {
 166         int result;
 167
 168         result = SMB_VFS_NEXT_RMDIR(handle, conn, path);
 169
 170         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 171                path,
 172                (result < 0) ? "failed: " : "",
 173                (result < 0) ? strerror(errno) : "");
 174         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 175                path,
 176                (result < 0) ? "failed: " : "",
 177                (result < 0) ? strerror(errno) : ""));
 178
 179         return result;
 180 }
 181
 182 static int audit_open(vfs_handle_struct *handle, connection_struct *conn, const char *fname, int flags, mode_t mode)
 183 {
 184         int result;
 185
 186         result = SMB_VFS_NEXT_OPEN(handle, conn, fname, flags, mode);
 187
 188         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 189                fname, result,
 190                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 191                (result < 0) ? "failed: " : "",
 192                (result < 0) ? strerror(errno) : "");
 193         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 194                fname,
 195                (result < 0) ? "failed: " : "",
 196                (result < 0) ? strerror(errno) : ""));
 197
 198         return result;
 199 }
 200
 201 static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
 202 {
 203         int result;
 204
 205         result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
 206
 207         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 208                fd,
 209                (result < 0) ? "failed: " : "",
 210                (result < 0) ? strerror(errno) : "");
 211         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 212                fd,
 213                (result < 0) ? "failed: " : "",
 214                (result < 0) ? strerror(errno) : ""));
 215
 216         return result;
 217 }
 218
 219 static int audit_rename(vfs_handle_struct *handle, connection_struct *conn, const char *old, const char *new)
 220 {
 221         int result;
 222
 223         result = SMB_VFS_NEXT_RENAME(handle, conn, old, new);
 224
 225         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 226                old, new,
 227                (result < 0) ? "failed: " : "",
 228                (result < 0) ? strerror(errno) : "");
 229         DEBUG(1, ("vfs_extd_audit: rename old: %s new: %s  %s %s\n",
 230                old, new,
 231                (result < 0) ? "failed: " : "",
 232                (result < 0) ? strerror(errno) : ""));
 233
 234         return result;
 235 }
 236
 237 static int audit_unlink(vfs_handle_struct *handle, connection_struct *conn, const char *path)
 238 {
 239         int result;
 240
 241         result = SMB_VFS_NEXT_UNLINK(handle, conn, path);
 242
 243         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 244                path,
 245                (result < 0) ? "failed: " : "",
 246                (result < 0) ? strerror(errno) : "");
 247         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 248                path,
 249                (result < 0) ? "failed: " : "",
 250                (result < 0) ? strerror(errno) : ""));
 251
 252         return result;
 253 }
 254
 255 static int audit_chmod(vfs_handle_struct *handle, connection_struct *conn, const char *path, mode_t mode)
 256 {
 257         int result;
 258
 259         result = SMB_VFS_NEXT_CHMOD(handle, conn, path, mode);
 260
 261         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 262                path, mode,
 263                (result < 0) ? "failed: " : "",
 264                (result < 0) ? strerror(errno) : "");
 265         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 266                path, mode,
 267                (result < 0) ? "failed: " : "",
 268                (result < 0) ? strerror(errno) : ""));
 269
 270         return result;
 271 }
 272
 273 static int audit_chmod_acl(vfs_handle_struct *handle, connection_struct *conn, const char *path, mode_t mode)
 274 {
 275         int result;
 276
 277         result = SMB_VFS_NEXT_CHMOD_ACL(handle, conn, path, mode);
 278
 279         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 280                path, mode,
 281                (result < 0) ? "failed: " : "",
 282                (result < 0) ? strerror(errno) : "");
 283         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 284                 path, mode,
 285                (result < 0) ? "failed: " : "",
 286                (result < 0) ? strerror(errno) : ""));
 287
 288         return result;
 289 }
 290
 291 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
 292 {
 293         int result;
 294
 295         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, fd, mode);
 296
 297         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 298                fsp->fsp_name, mode,
 299                (result < 0) ? "failed: " : "",
 300                (result < 0) ? strerror(errno) : "");
 301         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 302                fsp->fsp_name,  mode,
 303                (result < 0) ? "failed: " : "",
 304                (result < 0) ? strerror(errno) : ""));
 305
 306         return result;
 307 }
 308
 309 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
 310 {
 311         int result;
 312
 313         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, fd, mode);
 314
 315         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 316                fsp->fsp_name, mode,
 317                (result < 0) ? "failed: " : "",
 318                (result < 0) ? strerror(errno) : "");
 319         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 320                fsp->fsp_name,  mode,
 321                (result < 0) ? "failed: " : "",
 322                (result < 0) ? strerror(errno) : ""));
 323
 324         return result;
 325 }
 326
 327 NTSTATUS vfs_extd_audit_init(void)
 328 {
 329         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
 330
 331         if (!NT_STATUS_IS_OK(ret))
 332                 return ret;
 333
 334         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 335         if (vfs_extd_audit_debug_level == -1) {
 336                 vfs_extd_audit_debug_level = DBGC_VFS;
 337                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 338         } else {
 339                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 340         }
 341
 342         return ret;
 343 }