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                 { LOG_USER, "USER" },
  40                 { LOG_LOCAL0, "LOCAL0" },
  41                 { LOG_LOCAL1, "LOCAL1" },
  42                 { LOG_LOCAL2, "LOCAL2" },
  43                 { LOG_LOCAL3, "LOCAL3" },
  44                 { LOG_LOCAL4, "LOCAL4" },
  45                 { LOG_LOCAL5, "LOCAL5" },
  46                 { LOG_LOCAL6, "LOCAL6" },
  47                 { LOG_LOCAL7, "LOCAL7" },
  48                 { -1, NULL}
  49         };
  50
  51         int facility;
  52
  53         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  54
  55         return facility;
  56 }
  57
  58
  59 static int audit_syslog_priority(vfs_handle_struct *handle)
  60 {
  61         static const struct enum_list enum_log_priorities[] = {
  62                 { LOG_EMERG, "EMERG" },
  63                 { LOG_ALERT, "ALERT" },
  64                 { LOG_CRIT, "CRIT" },
  65                 { LOG_ERR, "ERR" },
  66                 { LOG_WARNING, "WARNING" },
  67                 { LOG_NOTICE, "NOTICE" },
  68                 { LOG_INFO, "INFO" },
  69                 { LOG_DEBUG, "DEBUG" },
  70                 { -1, NULL}
  71         };
  72
  73         int priority;
  74
  75         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
  76                                 enum_log_priorities, LOG_NOTICE);
  77         if (priority == -1) {
  78                 priority = LOG_WARNING;
  79         }
  80
  81         return priority;
  82 }
  83
  84 /* Implementation of vfs_ops.  Pass everything on to the default
  85    operation but log event first. */
  86
  87 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  88 {
  89         int result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  90
  91         if (result < 0) {
  92                 return result;
  93         }
  94
  95         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  96
  97         if (lp_syslog() > 0) {
  98                 syslog(audit_syslog_priority(handle),
  99                        "connect to service %s by user %s\n",
 100                        svc, user);
 101         }
 102         DEBUG(10, ("Connected to service %s as user %s\n",
 103                svc, user));
 104
 105         return 0;
 106 }
 107
 108 static void audit_disconnect(vfs_handle_struct *handle)
 109 {
 110         if (lp_syslog() > 0) {
 111                 syslog(audit_syslog_priority(handle), "disconnected\n");
 112         }
 113         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 114         SMB_VFS_NEXT_DISCONNECT(handle);
 115
 116         return;
 117 }
 118
 119 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 120 {
 121         SMB_STRUCT_DIR *result;
 122
 123         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 124
 125         if (lp_syslog() > 0) {
 126                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 127                        fname,
 128                        (result == NULL) ? "failed: " : "",
 129                        (result == NULL) ? strerror(errno) : "");
 130         }
 131         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 132                fname,
 133                (result == NULL) ? "failed: " : "",
 134                (result == NULL) ? strerror(errno) : ""));
 135
 136         return result;
 137 }
 138
 139 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 140 {
 141         int result;
 142
 143         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 144
 145         if (lp_syslog() > 0) {
 146                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 147                        path,
 148                        (result < 0) ? "failed: " : "",
 149                        (result < 0) ? strerror(errno) : "");
 150         }
 151         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 152                path,
 153                (result < 0) ? "failed: " : "",
 154                (result < 0) ? strerror(errno) : ""));
 155
 156         return result;
 157 }
 158
 159 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 160 {
 161         int result;
 162
 163         result = SMB_VFS_NEXT_RMDIR(handle, path);
 164
 165         if (lp_syslog() > 0) {
 166                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 167                        path,
 168                        (result < 0) ? "failed: " : "",
 169                        (result < 0) ? strerror(errno) : "");
 170         }
 171         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 172                path,
 173                (result < 0) ? "failed: " : "",
 174                (result < 0) ? strerror(errno) : ""));
 175
 176         return result;
 177 }
 178
 179 static int audit_open(vfs_handle_struct *handle,
 180                       struct smb_filename *smb_fname, files_struct *fsp,
 181                       int flags, mode_t mode)
 182 {
 183         int result;
 184
 185         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 186
 187         if (lp_syslog() > 0) {
 188                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 189                        smb_fname->base_name, result,
 190                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 191                        (result < 0) ? "failed: " : "",
 192                        (result < 0) ? strerror(errno) : "");
 193         }
 194         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 195                smb_fname_str_dbg(smb_fname),
 196                (result < 0) ? "failed: " : "",
 197                (result < 0) ? strerror(errno) : ""));
 198
 199         return result;
 200 }
 201
 202 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 203 {
 204         int result;
 205
 206         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 207
 208         if (lp_syslog() > 0) {
 209                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 210                        fsp->fh->fd,
 211                        (result < 0) ? "failed: " : "",
 212                        (result < 0) ? strerror(errno) : "");
 213         }
 214         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 215                fsp->fh->fd,
 216                (result < 0) ? "failed: " : "",
 217                (result < 0) ? strerror(errno) : ""));
 218
 219         return result;
 220 }
 221
 222 static int audit_rename(vfs_handle_struct *handle,
 223                         const struct smb_filename *smb_fname_src,
 224                         const struct smb_filename *smb_fname_dst)
 225 {
 226         int result;
 227
 228         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 229
 230         if (lp_syslog() > 0) {
 231                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 232                        smb_fname_src->base_name,
 233                        smb_fname_dst->base_name,
 234                        (result < 0) ? "failed: " : "",
 235                        (result < 0) ? strerror(errno) : "");
 236         }
 237         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 238                 smb_fname_str_dbg(smb_fname_src),
 239                 smb_fname_str_dbg(smb_fname_dst),
 240                (result < 0) ? "failed: " : "",
 241                (result < 0) ? strerror(errno) : ""));
 242
 243         return result;
 244 }
 245
 246 static int audit_unlink(vfs_handle_struct *handle,
 247                         const struct smb_filename *smb_fname)
 248 {
 249         int result;
 250
 251         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 252
 253         if (lp_syslog() > 0) {
 254                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 255                        smb_fname->base_name,
 256                        (result < 0) ? "failed: " : "",
 257                        (result < 0) ? strerror(errno) : "");
 258         }
 259         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 260                smb_fname_str_dbg(smb_fname),
 261                (result < 0) ? "failed: " : "",
 262                (result < 0) ? strerror(errno) : ""));
 263
 264         return result;
 265 }
 266
 267 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 268 {
 269         int result;
 270
 271         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 272
 273         if (lp_syslog() > 0) {
 274                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 275                        path, mode,
 276                        (result < 0) ? "failed: " : "",
 277                        (result < 0) ? strerror(errno) : "");
 278         }
 279         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 280                path, (unsigned int)mode,
 281                (result < 0) ? "failed: " : "",
 282                (result < 0) ? strerror(errno) : ""));
 283
 284         return result;
 285 }
 286
 287 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 288 {
 289         int result;
 290
 291         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 292
 293         if (lp_syslog() > 0) {
 294                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 295                        path, mode,
 296                        (result < 0) ? "failed: " : "",
 297                        (result < 0) ? strerror(errno) : "");
 298         }
 299         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 300                 path, (unsigned int)mode,
 301                (result < 0) ? "failed: " : "",
 302                (result < 0) ? strerror(errno) : ""));
 303
 304         return result;
 305 }
 306
 307 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 308 {
 309         int result;
 310
 311         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 312
 313         if (lp_syslog() > 0) {
 314                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 315                        fsp->fsp_name->base_name, mode,
 316                        (result < 0) ? "failed: " : "",
 317                        (result < 0) ? strerror(errno) : "");
 318         }
 319         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 320                fsp_str_dbg(fsp), (unsigned int)mode,
 321                (result < 0) ? "failed: " : "",
 322                (result < 0) ? strerror(errno) : ""));
 323
 324         return result;
 325 }
 326
 327 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 328 {
 329         int result;
 330
 331         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 332
 333         if (lp_syslog() > 0) {
 334                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 335                        fsp->fsp_name->base_name, mode,
 336                        (result < 0) ? "failed: " : "",
 337                        (result < 0) ? strerror(errno) : "");
 338         }
 339         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 340                 fsp_str_dbg(fsp),  (unsigned int)mode,
 341                (result < 0) ? "failed: " : "",
 342                (result < 0) ? strerror(errno) : ""));
 343
 344         return result;
 345 }
 346
 347 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 348         .connect_fn = audit_connect,
 349         .disconnect_fn = audit_disconnect,
 350         .opendir_fn = audit_opendir,
 351         .mkdir_fn = audit_mkdir,
 352         .rmdir_fn = audit_rmdir,
 353         .open_fn = audit_open,
 354         .close_fn = audit_close,
 355         .rename_fn = audit_rename,
 356         .unlink_fn = audit_unlink,
 357         .chmod_fn = audit_chmod,
 358         .fchmod_fn = audit_fchmod,
 359         .chmod_acl_fn = audit_chmod_acl,
 360         .fchmod_acl_fn = audit_fchmod_acl,
 361 };
 362
 363 NTSTATUS vfs_extd_audit_init(void)
 364 {
 365         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 366                                         "extd_audit", &vfs_extd_audit_fns);
 367
 368         if (!NT_STATUS_IS_OK(ret))
 369                 return ret;
 370
 371         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 372         if (vfs_extd_audit_debug_level == -1) {
 373                 vfs_extd_audit_debug_level = DBGC_VFS;
 374                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 375         } else {
 376                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 377         }
 378
 379         return ret;
 380 }