source3/modules/vfs_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) Stefan (metze) Metzmacher      2002
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23
  24 #include "includes.h"
  25 #include "system/filesys.h"
  26 #include "system/syslog.h"
  27 #include "smbd/smbd.h"
  28 #include "lib/param/loadparm.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_VFS
  32
  33 static int audit_syslog_facility(vfs_handle_struct *handle)
  34 {
  35         static const struct enum_list enum_log_facilities[] = {
  36 #ifdef LOG_AUTH
  37                 { LOG_AUTH,             "AUTH" },
  38 #endif
  39 #ifdef LOG_AUTHPRIV
  40                 { LOG_AUTHPRIV,         "AUTHPRIV" },
  41 #endif
  42 #ifdef LOG_AUDIT
  43                 { LOG_AUDIT,            "AUDIT" },
  44 #endif
  45 #ifdef LOG_CONSOLE
  46                 { LOG_CONSOLE,          "CONSOLE" },
  47 #endif
  48 #ifdef LOG_CRON
  49                 { LOG_CRON,             "CRON" },
  50 #endif
  51 #ifdef LOG_DAEMON
  52                 { LOG_DAEMON,           "DAEMON" },
  53 #endif
  54 #ifdef LOG_FTP
  55                 { LOG_FTP,              "FTP" },
  56 #endif
  57 #ifdef LOG_INSTALL
  58                 { LOG_INSTALL,          "INSTALL" },
  59 #endif
  60 #ifdef LOG_KERN
  61                 { LOG_KERN,             "KERN" },
  62 #endif
  63 #ifdef LOG_LAUNCHD
  64                 { LOG_LAUNCHD,          "LAUNCHD" },
  65 #endif
  66 #ifdef LOG_LFMT
  67                 { LOG_LFMT,             "LFMT" },
  68 #endif
  69 #ifdef LOG_LPR
  70                 { LOG_LPR,              "LPR" },
  71 #endif
  72 #ifdef LOG_MAIL
  73                 { LOG_MAIL,             "MAIL" },
  74 #endif
  75 #ifdef LOG_MEGASAFE
  76                 { LOG_MEGASAFE,         "MEGASAFE" },
  77 #endif
  78 #ifdef LOG_NETINFO
  79                 { LOG_NETINFO,          "NETINFO" },
  80 #endif
  81 #ifdef LOG_NEWS
  82                 { LOG_NEWS,             "NEWS" },
  83 #endif
  84 #ifdef LOG_NFACILITIES
  85                 { LOG_NFACILITIES,      "NFACILITIES" },
  86 #endif
  87 #ifdef LOG_NTP
  88                 { LOG_NTP,              "NTP" },
  89 #endif
  90 #ifdef LOG_RAS
  91                 { LOG_RAS,              "RAS" },
  92 #endif
  93 #ifdef LOG_REMOTEAUTH
  94                 { LOG_REMOTEAUTH,       "REMOTEAUTH" },
  95 #endif
  96 #ifdef LOG_SECURITY
  97                 { LOG_SECURITY,         "SECURITY" },
  98 #endif
  99 #ifdef LOG_SYSLOG
 100                 { LOG_SYSLOG,           "SYSLOG" },
 101 #endif
 102 #ifdef LOG_USER
 103                 { LOG_USER,             "USER" },
 104 #endif
 105 #ifdef LOG_UUCP
 106                 { LOG_UUCP,             "UUCP" },
 107 #endif
 108                 { LOG_LOCAL0,           "LOCAL0" },
 109                 { LOG_LOCAL1,           "LOCAL1" },
 110                 { LOG_LOCAL2,           "LOCAL2" },
 111                 { LOG_LOCAL3,           "LOCAL3" },
 112                 { LOG_LOCAL4,           "LOCAL4" },
 113                 { LOG_LOCAL5,           "LOCAL5" },
 114                 { LOG_LOCAL6,           "LOCAL6" },
 115                 { LOG_LOCAL7,           "LOCAL7" },
 116                 { -1,                   NULL }
 117         };
 118
 119         int facility;
 120
 121         facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
 122
 123         return facility;
 124 }
 125
 126
 127 static int audit_syslog_priority(vfs_handle_struct *handle)
 128 {
 129         static const struct enum_list enum_log_priorities[] = {
 130                 { LOG_EMERG, "EMERG" },
 131                 { LOG_ALERT, "ALERT" },
 132                 { LOG_CRIT, "CRIT" },
 133                 { LOG_ERR, "ERR" },
 134                 { LOG_WARNING, "WARNING" },
 135                 { LOG_NOTICE, "NOTICE" },
 136                 { LOG_INFO, "INFO" },
 137                 { LOG_DEBUG, "DEBUG" },
 138                 { -1, NULL }
 139         };
 140
 141         int priority;
 142
 143         priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority",
 144                                 enum_log_priorities, LOG_NOTICE);
 145         if (priority == -1) {
 146                 priority = LOG_WARNING;
 147         }
 148
 149         return priority;
 150 }
 151
 152 /* Implementation of vfs_ops.  Pass everything on to the default
 153    operation but log event first. */
 154
 155 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
 156 {
 157         int result;
 158
 159         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
 160         if (result < 0) {
 161                 return result;
 162         }
 163
 164         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
 165
 166         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
 167                svc, user);
 168
 169         return 0;
 170 }
 171
 172 static void audit_disconnect(vfs_handle_struct *handle)
 173 {
 174         syslog(audit_syslog_priority(handle), "disconnected\n");
 175         SMB_VFS_NEXT_DISCONNECT(handle);
 176
 177         return;
 178 }
 179
 180 static DIR *audit_opendir(vfs_handle_struct *handle,
 181                         const struct smb_filename *smb_fname,
 182                         const char *mask,
 183                         uint32_t attr)
 184 {
 185         DIR *result;
 186
 187         result = SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
 188
 189         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 190                smb_fname->base_name,
 191                (result == NULL) ? "failed: " : "",
 192                (result == NULL) ? strerror(errno) : "");
 193
 194         return result;
 195 }
 196
 197 static int audit_mkdir(vfs_handle_struct *handle,
 198                 const struct smb_filename *smb_fname,
 199                 mode_t mode)
 200 {
 201         int result;
 202
 203         result = SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
 204
 205         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 206                smb_fname->base_name,
 207                (result < 0) ? "failed: " : "",
 208                (result < 0) ? strerror(errno) : "");
 209
 210         return result;
 211 }
 212
 213 static int audit_rmdir(vfs_handle_struct *handle,
 214                 const struct smb_filename *smb_fname)
 215 {
 216         int result;
 217
 218         result = SMB_VFS_NEXT_RMDIR(handle, smb_fname);
 219
 220         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 221                smb_fname->base_name,
 222                (result < 0) ? "failed: " : "",
 223                (result < 0) ? strerror(errno) : "");
 224
 225         return result;
 226 }
 227
 228 static int audit_open(vfs_handle_struct *handle,
 229                       struct smb_filename *smb_fname, files_struct *fsp,
 230                       int flags, mode_t mode)
 231 {
 232         int result;
 233
 234         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 235
 236         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 237                smb_fname->base_name, result,
 238                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 239                (result < 0) ? "failed: " : "",
 240                (result < 0) ? strerror(errno) : "");
 241
 242         return result;
 243 }
 244
 245 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 246 {
 247         int result;
 248
 249         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 250
 251         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 252                fsp->fh->fd,
 253                (result < 0) ? "failed: " : "",
 254                (result < 0) ? strerror(errno) : "");
 255
 256         return result;
 257 }
 258
 259 static int audit_rename(vfs_handle_struct *handle,
 260                         const struct smb_filename *smb_fname_src,
 261                         const struct smb_filename *smb_fname_dst)
 262 {
 263         int result;
 264
 265         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 266
 267         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 268                smb_fname_src->base_name,
 269                smb_fname_dst->base_name,
 270                (result < 0) ? "failed: " : "",
 271                (result < 0) ? strerror(errno) : "");
 272
 273         return result;
 274 }
 275
 276 static int audit_unlink(vfs_handle_struct *handle,
 277                         const struct smb_filename *smb_fname)
 278 {
 279         int result;
 280
 281         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 282
 283         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 284                smb_fname->base_name,
 285                (result < 0) ? "failed: " : "",
 286                (result < 0) ? strerror(errno) : "");
 287
 288         return result;
 289 }
 290
 291 static int audit_chmod(vfs_handle_struct *handle,
 292                         const struct smb_filename *smb_fname,
 293                         mode_t mode)
 294 {
 295         int result;
 296
 297         result = SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
 298
 299         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 300                smb_fname->base_name, 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         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 314                fsp->fsp_name->base_name, mode,
 315                (result < 0) ? "failed: " : "",
 316                (result < 0) ? strerror(errno) : "");
 317
 318         return result;
 319 }
 320
 321 static struct vfs_fn_pointers vfs_audit_fns = {
 322         .connect_fn = audit_connect,
 323         .disconnect_fn = audit_disconnect,
 324         .opendir_fn = audit_opendir,
 325         .mkdir_fn = audit_mkdir,
 326         .rmdir_fn = audit_rmdir,
 327         .open_fn = audit_open,
 328         .close_fn = audit_close,
 329         .rename_fn = audit_rename,
 330         .unlink_fn = audit_unlink,
 331         .chmod_fn = audit_chmod,
 332         .fchmod_fn = audit_fchmod,
 333 };
 334
 335 static_decl_vfs;
 336 NTSTATUS vfs_audit_init(TALLOC_CTX *ctx)
 337 {
 338         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
 339                                 &vfs_audit_fns);
 340 }