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 = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  84
  85         if (result < 0) {
  86                 return result;
  87         }
  88
  89         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  90
  91         if (lp_syslog() > 0) {
  92                 syslog(audit_syslog_priority(handle),
  93                        "connect to service %s by user %s\n",
  94                        svc, user);
  95         }
  96         DEBUG(10, ("Connected to service %s as user %s\n",
  97                svc, user));
  98
  99         return 0;
 100 }
 101
 102 static void audit_disconnect(vfs_handle_struct *handle)
 103 {
 104         if (lp_syslog() > 0) {
 105                 syslog(audit_syslog_priority(handle), "disconnected\n");
 106         }
 107         DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
 108         SMB_VFS_NEXT_DISCONNECT(handle);
 109
 110         return;
 111 }
 112
 113 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 114 {
 115         SMB_STRUCT_DIR *result;
 116
 117         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 118
 119         if (lp_syslog() > 0) {
 120                 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 121                        fname,
 122                        (result == NULL) ? "failed: " : "",
 123                        (result == NULL) ? strerror(errno) : "");
 124         }
 125         DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
 126                fname,
 127                (result == NULL) ? "failed: " : "",
 128                (result == NULL) ? strerror(errno) : ""));
 129
 130         return result;
 131 }
 132
 133 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 134 {
 135         int result;
 136
 137         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 138
 139         if (lp_syslog() > 0) {
 140                 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 141                        path,
 142                        (result < 0) ? "failed: " : "",
 143                        (result < 0) ? strerror(errno) : "");
 144         }
 145         DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
 146                path,
 147                (result < 0) ? "failed: " : "",
 148                (result < 0) ? strerror(errno) : ""));
 149
 150         return result;
 151 }
 152
 153 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 154 {
 155         int result;
 156
 157         result = SMB_VFS_NEXT_RMDIR(handle, path);
 158
 159         if (lp_syslog() > 0) {
 160                 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 161                        path,
 162                        (result < 0) ? "failed: " : "",
 163                        (result < 0) ? strerror(errno) : "");
 164         }
 165         DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
 166                path,
 167                (result < 0) ? "failed: " : "",
 168                (result < 0) ? strerror(errno) : ""));
 169
 170         return result;
 171 }
 172
 173 static int audit_open(vfs_handle_struct *handle,
 174                       struct smb_filename *smb_fname, files_struct *fsp,
 175                       int flags, mode_t mode)
 176 {
 177         int result;
 178
 179         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 180
 181         if (lp_syslog() > 0) {
 182                 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 183                        smb_fname->base_name, result,
 184                        ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 185                        (result < 0) ? "failed: " : "",
 186                        (result < 0) ? strerror(errno) : "");
 187         }
 188         DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
 189                smb_fname_str_dbg(smb_fname),
 190                (result < 0) ? "failed: " : "",
 191                (result < 0) ? strerror(errno) : ""));
 192
 193         return result;
 194 }
 195
 196 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 197 {
 198         int result;
 199
 200         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 201
 202         if (lp_syslog() > 0) {
 203                 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 204                        fsp->fh->fd,
 205                        (result < 0) ? "failed: " : "",
 206                        (result < 0) ? strerror(errno) : "");
 207         }
 208         DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
 209                fsp->fh->fd,
 210                (result < 0) ? "failed: " : "",
 211                (result < 0) ? strerror(errno) : ""));
 212
 213         return result;
 214 }
 215
 216 static int audit_rename(vfs_handle_struct *handle,
 217                         const struct smb_filename *smb_fname_src,
 218                         const struct smb_filename *smb_fname_dst)
 219 {
 220         int result;
 221
 222         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 223
 224         if (lp_syslog() > 0) {
 225                 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 226                        smb_fname_src->base_name,
 227                        smb_fname_dst->base_name,
 228                        (result < 0) ? "failed: " : "",
 229                        (result < 0) ? strerror(errno) : "");
 230         }
 231         DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s  %s %s\n",
 232                 smb_fname_str_dbg(smb_fname_src),
 233                 smb_fname_str_dbg(smb_fname_dst),
 234                (result < 0) ? "failed: " : "",
 235                (result < 0) ? strerror(errno) : ""));
 236
 237         return result;
 238 }
 239
 240 static int audit_unlink(vfs_handle_struct *handle,
 241                         const struct smb_filename *smb_fname)
 242 {
 243         int result;
 244
 245         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 246
 247         if (lp_syslog() > 0) {
 248                 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 249                        smb_fname->base_name,
 250                        (result < 0) ? "failed: " : "",
 251                        (result < 0) ? strerror(errno) : "");
 252         }
 253         DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
 254                smb_fname_str_dbg(smb_fname),
 255                (result < 0) ? "failed: " : "",
 256                (result < 0) ? strerror(errno) : ""));
 257
 258         return result;
 259 }
 260
 261 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 262 {
 263         int result;
 264
 265         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 266
 267         if (lp_syslog() > 0) {
 268                 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 269                        path, mode,
 270                        (result < 0) ? "failed: " : "",
 271                        (result < 0) ? strerror(errno) : "");
 272         }
 273         DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
 274                path, (unsigned int)mode,
 275                (result < 0) ? "failed: " : "",
 276                (result < 0) ? strerror(errno) : ""));
 277
 278         return result;
 279 }
 280
 281 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 282 {
 283         int result;
 284
 285         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 286
 287         if (lp_syslog() > 0) {
 288                 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 289                        path, mode,
 290                        (result < 0) ? "failed: " : "",
 291                        (result < 0) ? strerror(errno) : "");
 292         }
 293         DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
 294                 path, (unsigned int)mode,
 295                (result < 0) ? "failed: " : "",
 296                (result < 0) ? strerror(errno) : ""));
 297
 298         return result;
 299 }
 300
 301 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 302 {
 303         int result;
 304
 305         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 306
 307         if (lp_syslog() > 0) {
 308                 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 309                        fsp->fsp_name->base_name, mode,
 310                        (result < 0) ? "failed: " : "",
 311                        (result < 0) ? strerror(errno) : "");
 312         }
 313         DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
 314                fsp_str_dbg(fsp), (unsigned int)mode,
 315                (result < 0) ? "failed: " : "",
 316                (result < 0) ? strerror(errno) : ""));
 317
 318         return result;
 319 }
 320
 321 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 322 {
 323         int result;
 324
 325         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 326
 327         if (lp_syslog() > 0) {
 328                 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 329                        fsp->fsp_name->base_name, mode,
 330                        (result < 0) ? "failed: " : "",
 331                        (result < 0) ? strerror(errno) : "");
 332         }
 333         DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
 334                 fsp_str_dbg(fsp),  (unsigned int)mode,
 335                (result < 0) ? "failed: " : "",
 336                (result < 0) ? strerror(errno) : ""));
 337
 338         return result;
 339 }
 340
 341 static struct vfs_fn_pointers vfs_extd_audit_fns = {
 342         .connect_fn = audit_connect,
 343         .disconnect = audit_disconnect,
 344         .opendir = audit_opendir,
 345         .mkdir = audit_mkdir,
 346         .rmdir = audit_rmdir,
 347         .open = audit_open,
 348         .close_fn = audit_close,
 349         .rename = audit_rename,
 350         .unlink = audit_unlink,
 351         .chmod = audit_chmod,
 352         .fchmod = audit_fchmod,
 353         .chmod_acl = audit_chmod_acl,
 354         .fchmod_acl = audit_fchmod_acl,
 355 };
 356
 357 NTSTATUS vfs_extd_audit_init(void)
 358 {
 359         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 360                                         "extd_audit", &vfs_extd_audit_fns);
 361
 362         if (!NT_STATUS_IS_OK(ret))
 363                 return ret;
 364
 365         vfs_extd_audit_debug_level = debug_add_class("extd_audit");
 366         if (vfs_extd_audit_debug_level == -1) {
 367                 vfs_extd_audit_debug_level = DBGC_VFS;
 368                 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
 369         } else {
 370                 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
 371         }
 372
 373         return ret;
 374 }