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
  30 static int vfs_extd_audit_debug_level = DBGC_VFS;
  31
  32 #undef DBGC_CLASS
  33 #define DBGC_CLASS vfs_extd_audit_debug_level
  34
  35 static int audit_syslog_facility(vfs_handle_struct *handle)
  36 {
  37         static const struct enum_list enum_log_facilities[] = {
  38                 { LOG_USER, "USER" },
  39                 { LOG_LOCAL0, "LOCAL0" },
  40                 { LOG_LOCAL1, "LOCAL1" },
  41                 { LOG_LOCAL2, "LOCAL2" },
  42                 { LOG_LOCAL3, "LOCAL3" },
  43                 { LOG_LOCAL4, "LOCAL4" },
  44                 { LOG_LOCAL5, "LOCAL5" },
  45                 { LOG_LOCAL6, "LOCAL6" },
  46                 { LOG_LOCAL7, "LOCAL7" }
  47         };
  48
  49         int facility;
  50
  51         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  52
  53         return facility;
  54 }
  55
  56
  57 static int audit_syslog_priority(vfs_handle_struct *handle)
  58 {
  59         static const struct enum_list enum_log_priorities[] = {
  60                 { LOG_EMERG, "EMERG" },
  61                 { LOG_ALERT, "ALERT" },
  62                 { LOG_CRIT, "CRIT" },
  63                 { LOG_ERR, "ERR" },
  64                 { LOG_WARNING, "WARNING" },
  65                 { LOG_NOTICE, "NOTICE" },
  66                 { LOG_INFO, "INFO" },
  67                 { LOG_DEBUG, "DEBUG" }
  68         };
  69
  70         int priority;
  71
  72         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
  73                                 enum_log_priorities, LOG_NOTICE);
  74         if (priority == -1) {
  75                 priority = LOG_WARNING;
  76         }
  77
  78         return priority;
  79 }
  80
  81 /* Implementation of vfs_ops.  Pass everything on to the default
  82    operation but log event first. */
  83
  84 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  85 {
  86         int result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  87
  88         if (result < 0) {
  89                 return result;
  90         }
  91
  92         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  93
  94         if (lp_syslog() > 0) {
  95                 syslog(audit_syslog_priority(handle),
  96                        "connect to service %s by user %s\n",
  97                        svc, user);
  98         }
  99         DEBUG(10, ("Connected to service %s as user %s\n",
 100                svc, user));
 101
 102         return 0;
 103 }
 104
 105 static void audit_disconnect(vfs_handle_struct *handle)
 106 {
 107         if (lp_syslog() > 0) {
 108                 syslog(audit_syslog_priority(handle), "disconnected\n");
 109         }
 110         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 111         SMB_VFS_NEXT_DISCONNECT(handle);
 112
 113         return;
 114 }
 115
 116 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 117 {
 118         SMB_STRUCT_DIR *result;
 119
 120         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 121
 122         if (lp_syslog() > 0) {
 123                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 124                        fname,
 125                        (result == NULL) ? "failed: " : "",
 126                        (result == NULL) ? strerror(errno) : "");
 127         }
 128         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 129                fname,
 130                (result == NULL) ? "failed: " : "",
 131                (result == NULL) ? strerror(errno) : ""));
 132
 133         return result;
 134 }
 135
 136 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 137 {
 138         int result;
 139
 140         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 141
 142         if (lp_syslog() > 0) {
 143                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 144                        path,
 145                        (result < 0) ? "failed: " : "",
 146                        (result < 0) ? strerror(errno) : "");
 147         }
 148         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 149                path,
 150                (result < 0) ? "failed: " : "",
 151                (result < 0) ? strerror(errno) : ""));
 152
 153         return result;
 154 }
 155
 156 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 157 {
 158         int result;
 159
 160         result = SMB_VFS_NEXT_RMDIR(handle, path);
 161
 162         if (lp_syslog() > 0) {
 163                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 164                        path,
 165                        (result < 0) ? "failed: " : "",
 166                        (result < 0) ? strerror(errno) : "");
 167         }
 168         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 169                path,
 170                (result < 0) ? "failed: " : "",
 171                (result < 0) ? strerror(errno) : ""));
 172
 173         return result;
 174 }
 175
 176 static int audit_open(vfs_handle_struct *handle,
 177                       struct smb_filename *smb_fname, files_struct *fsp,
 178                       int flags, mode_t mode)
 179 {
 180         int result;
 181
 182         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 183
 184         if (lp_syslog() > 0) {
 185                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 186                        smb_fname->base_name, result,
 187                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 188                        (result < 0) ? "failed: " : "",
 189                        (result < 0) ? strerror(errno) : "");
 190         }
 191         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 192                smb_fname_str_dbg(smb_fname),
 193                (result < 0) ? "failed: " : "",
 194                (result < 0) ? strerror(errno) : ""));
 195
 196         return result;
 197 }
 198
 199 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 200 {
 201         int result;
 202
 203         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 204
 205         if (lp_syslog() > 0) {
 206                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 207                        fsp->fh->fd,
 208                        (result < 0) ? "failed: " : "",
 209                        (result < 0) ? strerror(errno) : "");
 210         }
 211         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 212                fsp->fh->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,
 220                         const struct smb_filename *smb_fname_src,
 221                         const struct smb_filename *smb_fname_dst)
 222 {
 223         int result;
 224
 225         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 226
 227         if (lp_syslog() > 0) {
 228                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 229                        smb_fname_src->base_name,
 230                        smb_fname_dst->base_name,
 231                        (result < 0) ? "failed: " : "",
 232                        (result < 0) ? strerror(errno) : "");
 233         }
 234         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 235                 smb_fname_str_dbg(smb_fname_src),
 236                 smb_fname_str_dbg(smb_fname_dst),
 237                (result < 0) ? "failed: " : "",
 238                (result < 0) ? strerror(errno) : ""));
 239
 240         return result;
 241 }
 242
 243 static int audit_unlink(vfs_handle_struct *handle,
 244                         const struct smb_filename *smb_fname)
 245 {
 246         int result;
 247
 248         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 249
 250         if (lp_syslog() > 0) {
 251                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 252                        smb_fname->base_name,
 253                        (result < 0) ? "failed: " : "",
 254                        (result < 0) ? strerror(errno) : "");
 255         }
 256         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 257                smb_fname_str_dbg(smb_fname),
 258                (result < 0) ? "failed: " : "",
 259                (result < 0) ? strerror(errno) : ""));
 260
 261         return result;
 262 }
 263
 264 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 265 {
 266         int result;
 267
 268         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 269
 270         if (lp_syslog() > 0) {
 271                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 272                        path, mode,
 273                        (result < 0) ? "failed: " : "",
 274                        (result < 0) ? strerror(errno) : "");
 275         }
 276         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 277                path, (unsigned int)mode,
 278                (result < 0) ? "failed: " : "",
 279                (result < 0) ? strerror(errno) : ""));
 280
 281         return result;
 282 }
 283
 284 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 285 {
 286         int result;
 287
 288         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 289
 290         if (lp_syslog() > 0) {
 291                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 292                        path, mode,
 293                        (result < 0) ? "failed: " : "",
 294                        (result < 0) ? strerror(errno) : "");
 295         }
 296         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 297                 path, (unsigned int)mode,
 298                (result < 0) ? "failed: " : "",
 299                (result < 0) ? strerror(errno) : ""));
 300
 301         return result;
 302 }
 303
 304 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 305 {
 306         int result;
 307
 308         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 309
 310         if (lp_syslog() > 0) {
 311                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 312                        fsp->fsp_name->base_name, mode,
 313                        (result < 0) ? "failed: " : "",
 314                        (result < 0) ? strerror(errno) : "");
 315         }
 316         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 317                fsp_str_dbg(fsp), (unsigned int)mode,
 318                (result < 0) ? "failed: " : "",
 319                (result < 0) ? strerror(errno) : ""));
 320
 321         return result;
 322 }
 323
 324 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 325 {
 326         int result;
 327
 328         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 329
 330         if (lp_syslog() > 0) {
 331                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 332                        fsp->fsp_name->base_name, mode,
 333                        (result < 0) ? "failed: " : "",
 334                        (result < 0) ? strerror(errno) : "");
 335         }
 336         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 337                 fsp_str_dbg(fsp),  (unsigned int)mode,
 338                (result < 0) ? "failed: " : "",
 339                (result < 0) ? strerror(errno) : ""));
 340
 341         return result;
 342 }
 343
 344 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 345         .connect_fn = audit_connect,
 346         .disconnect = audit_disconnect,
 347         .opendir = audit_opendir,
 348         .mkdir = audit_mkdir,
 349         .rmdir = audit_rmdir,
 350         .open_fn = audit_open,
 351         .close_fn = audit_close,
 352         .rename = audit_rename,
 353         .unlink = audit_unlink,
 354         .chmod = audit_chmod,
 355         .fchmod = audit_fchmod,
 356         .chmod_acl = audit_chmod_acl,
 357         .fchmod_acl = audit_fchmod_acl,
 358 };
 359
 360 NTSTATUS vfs_extd_audit_init(void)
 361 {
 362         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 363                                         "extd_audit", &vfs_extd_audit_fns);
 364
 365         if (!NT_STATUS_IS_OK(ret))
 366                 return ret;
 367
 368         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 369         if (vfs_extd_audit_debug_level == -1) {
 370                 vfs_extd_audit_debug_level = DBGC_VFS;
 371                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 372         } else {
 373                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 374         }
 375
 376         return ret;
 377 }