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 static int audit_syslog_facility(vfs_handle_struct *handle)
  33 {
  34         static const struct enum_list enum_log_facilities[] = {
  35                 { LOG_USER, "USER" },
  36                 { LOG_LOCAL0, "LOCAL0" },
  37                 { LOG_LOCAL1, "LOCAL1" },
  38                 { LOG_LOCAL2, "LOCAL2" },
  39                 { LOG_LOCAL3, "LOCAL3" },
  40                 { LOG_LOCAL4, "LOCAL4" },
  41                 { LOG_LOCAL5, "LOCAL5" },
  42                 { LOG_LOCAL6, "LOCAL6" },
  43                 { LOG_LOCAL7, "LOCAL7" }
  44         };
  45
  46         int facility;
  47
  48         facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
  49
  50         return facility;
  51 }
  52
  53
  54 static int audit_syslog_priority(vfs_handle_struct *handle)
  55 {
  56         static const struct enum_list enum_log_priorities[] = {
  57                 { LOG_EMERG, "EMERG" },
  58                 { LOG_ALERT, "ALERT" },
  59                 { LOG_CRIT, "CRIT" },
  60                 { LOG_ERR, "ERR" },
  61                 { LOG_WARNING, "WARNING" },
  62                 { LOG_NOTICE, "NOTICE" },
  63                 { LOG_INFO, "INFO" },
  64                 { LOG_DEBUG, "DEBUG" }
  65         };
  66
  67         int priority;
  68
  69         priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
  70                                 enum_log_priorities, LOG_NOTICE);
  71         if (priority == -1) {
  72                 priority = LOG_WARNING;
  73         }
  74
  75         return priority;
  76 }
  77
  78 /* Implementation of vfs_ops.  Pass everything on to the default
  79    operation but log event first. */
  80
  81 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  82 {
  83         int result;
  84
  85         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  86
  87         if (lp_syslog() > 0) {
  88                 syslog(audit_syslog_priority(handle),
  89                        "connect to service %s by user %s\n",
  90                        svc, user);
  91         }
  92         DEBUG(10, ("Connected to service %s as user %s\n",
  93                svc, user));
  94
  95         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  96
  97         return result;
  98 }
  99
 100 static void audit_disconnect(vfs_handle_struct *handle)
 101 {
 102         if (lp_syslog() > 0) {
 103                 syslog(audit_syslog_priority(handle), "disconnected\n");
 104         }
 105         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 106         SMB_VFS_NEXT_DISCONNECT(handle);
 107
 108         return;
 109 }
 110
 111 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 112 {
 113         SMB_STRUCT_DIR *result;
 114
 115         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 116
 117         if (lp_syslog() > 0) {
 118                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 119                        fname,
 120                        (result == NULL) ? "failed: " : "",
 121                        (result == NULL) ? strerror(errno) : "");
 122         }
 123         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 124                fname,
 125                (result == NULL) ? "failed: " : "",
 126                (result == NULL) ? strerror(errno) : ""));
 127
 128         return result;
 129 }
 130
 131 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 132 {
 133         int result;
 134
 135         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 136
 137         if (lp_syslog() > 0) {
 138                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 139                        path,
 140                        (result < 0) ? "failed: " : "",
 141                        (result < 0) ? strerror(errno) : "");
 142         }
 143         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 144                path,
 145                (result < 0) ? "failed: " : "",
 146                (result < 0) ? strerror(errno) : ""));
 147
 148         return result;
 149 }
 150
 151 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 152 {
 153         int result;
 154
 155         result = SMB_VFS_NEXT_RMDIR(handle, path);
 156
 157         if (lp_syslog() > 0) {
 158                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 159                        path,
 160                        (result < 0) ? "failed: " : "",
 161                        (result < 0) ? strerror(errno) : "");
 162         }
 163         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 164                path,
 165                (result < 0) ? "failed: " : "",
 166                (result < 0) ? strerror(errno) : ""));
 167
 168         return result;
 169 }
 170
 171 static int audit_open(vfs_handle_struct *handle,
 172                       struct smb_filename *smb_fname, files_struct *fsp,
 173                       int flags, mode_t mode)
 174 {
 175         int result;
 176
 177         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 178
 179         if (lp_syslog() > 0) {
 180                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 181                        smb_fname->base_name, result,
 182                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 183                        (result < 0) ? "failed: " : "",
 184                        (result < 0) ? strerror(errno) : "");
 185         }
 186         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 187                smb_fname_str_dbg(smb_fname),
 188                (result < 0) ? "failed: " : "",
 189                (result < 0) ? strerror(errno) : ""));
 190
 191         return result;
 192 }
 193
 194 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 195 {
 196         int result;
 197
 198         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 199
 200         if (lp_syslog() > 0) {
 201                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 202                        fsp->fh->fd,
 203                        (result < 0) ? "failed: " : "",
 204                        (result < 0) ? strerror(errno) : "");
 205         }
 206         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 207                fsp->fh->fd,
 208                (result < 0) ? "failed: " : "",
 209                (result < 0) ? strerror(errno) : ""));
 210
 211         return result;
 212 }
 213
 214 static int audit_rename(vfs_handle_struct *handle,
 215                         const struct smb_filename *smb_fname_src,
 216                         const struct smb_filename *smb_fname_dst)
 217 {
 218         int result;
 219
 220         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 221
 222         if (lp_syslog() > 0) {
 223                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 224                        smb_fname_src->base_name,
 225                        smb_fname_dst->base_name,
 226                        (result < 0) ? "failed: " : "",
 227                        (result < 0) ? strerror(errno) : "");
 228         }
 229         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 230                 smb_fname_str_dbg(smb_fname_src),
 231                 smb_fname_str_dbg(smb_fname_dst),
 232                (result < 0) ? "failed: " : "",
 233                (result < 0) ? strerror(errno) : ""));
 234
 235         return result;
 236 }
 237
 238 static int audit_unlink(vfs_handle_struct *handle,
 239                         const struct smb_filename *smb_fname)
 240 {
 241         int result;
 242
 243         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 244
 245         if (lp_syslog() > 0) {
 246                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 247                        smb_fname->base_name,
 248                        (result < 0) ? "failed: " : "",
 249                        (result < 0) ? strerror(errno) : "");
 250         }
 251         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 252                smb_fname_str_dbg(smb_fname),
 253                (result < 0) ? "failed: " : "",
 254                (result < 0) ? strerror(errno) : ""));
 255
 256         return result;
 257 }
 258
 259 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 260 {
 261         int result;
 262
 263         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 264
 265         if (lp_syslog() > 0) {
 266                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 267                        path, mode,
 268                        (result < 0) ? "failed: " : "",
 269                        (result < 0) ? strerror(errno) : "");
 270         }
 271         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 272                path, (unsigned int)mode,
 273                (result < 0) ? "failed: " : "",
 274                (result < 0) ? strerror(errno) : ""));
 275
 276         return result;
 277 }
 278
 279 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 280 {
 281         int result;
 282
 283         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 284
 285         if (lp_syslog() > 0) {
 286                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 287                        path, mode,
 288                        (result < 0) ? "failed: " : "",
 289                        (result < 0) ? strerror(errno) : "");
 290         }
 291         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 292                 path, (unsigned int)mode,
 293                (result < 0) ? "failed: " : "",
 294                (result < 0) ? strerror(errno) : ""));
 295
 296         return result;
 297 }
 298
 299 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 300 {
 301         int result;
 302
 303         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 304
 305         if (lp_syslog() > 0) {
 306                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 307                        fsp->fsp_name->base_name, mode,
 308                        (result < 0) ? "failed: " : "",
 309                        (result < 0) ? strerror(errno) : "");
 310         }
 311         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 312                fsp_str_dbg(fsp), (unsigned int)mode,
 313                (result < 0) ? "failed: " : "",
 314                (result < 0) ? strerror(errno) : ""));
 315
 316         return result;
 317 }
 318
 319 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 320 {
 321         int result;
 322
 323         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 324
 325         if (lp_syslog() > 0) {
 326                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 327                        fsp->fsp_name->base_name, mode,
 328                        (result < 0) ? "failed: " : "",
 329                        (result < 0) ? strerror(errno) : "");
 330         }
 331         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 332                 fsp_str_dbg(fsp),  (unsigned int)mode,
 333                (result < 0) ? "failed: " : "",
 334                (result < 0) ? strerror(errno) : ""));
 335
 336         return result;
 337 }
 338
 339 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 340         .connect_fn = audit_connect,
 341         .disconnect = audit_disconnect,
 342         .opendir = audit_opendir,
 343         .mkdir = audit_mkdir,
 344         .rmdir = audit_rmdir,
 345         .open = audit_open,
 346         .close_fn = audit_close,
 347         .rename = audit_rename,
 348         .unlink = audit_unlink,
 349         .chmod = audit_chmod,
 350         .fchmod = audit_fchmod,
 351         .chmod_acl = audit_chmod_acl,
 352         .fchmod_acl = audit_fchmod_acl,
 353 };
 354
 355 NTSTATUS vfs_extd_audit_init(void)
 356 {
 357         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 358                                         "extd_audit", &vfs_extd_audit_fns);
 359
 360         if (!NT_STATUS_IS_OK(ret))
 361                 return ret;
 362
 363         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 364         if (vfs_extd_audit_debug_level == -1) {
 365                 vfs_extd_audit_debug_level = DBGC_VFS;
 366                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 367         } else {
 368                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 369         }
 370
 371         return ret;
 372 }