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
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_VFS
  28
  29 static int audit_syslog_facility(vfs_handle_struct *handle)
  30 {
  31         static const struct enum_list enum_log_facilities[] = {
  32                 { LOG_USER, "USER" },
  33                 { LOG_LOCAL0, "LOCAL0" },
  34                 { LOG_LOCAL1, "LOCAL1" },
  35                 { LOG_LOCAL2, "LOCAL2" },
  36                 { LOG_LOCAL3, "LOCAL3" },
  37                 { LOG_LOCAL4, "LOCAL4" },
  38                 { LOG_LOCAL5, "LOCAL5" },
  39                 { LOG_LOCAL6, "LOCAL6" },
  40                 { LOG_LOCAL7, "LOCAL7" }
  41         };
  42
  43         int facility;
  44
  45         facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
  46
  47         return facility;
  48 }
  49
  50
  51 static int audit_syslog_priority(vfs_handle_struct *handle)
  52 {
  53         static const struct enum_list enum_log_priorities[] = {
  54                 { LOG_EMERG, "EMERG" },
  55                 { LOG_ALERT, "ALERT" },
  56                 { LOG_CRIT, "CRIT" },
  57                 { LOG_ERR, "ERR" },
  58                 { LOG_WARNING, "WARNING" },
  59                 { LOG_NOTICE, "NOTICE" },
  60                 { LOG_INFO, "INFO" },
  61                 { LOG_DEBUG, "DEBUG" }
  62         };
  63
  64         int priority;
  65
  66         priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority",
  67                                 enum_log_priorities, LOG_NOTICE);
  68         if (priority == -1) {
  69                 priority = LOG_WARNING;
  70         }
  71
  72         return priority;
  73 }
  74
  75 /* Implementation of vfs_ops.  Pass everything on to the default
  76    operation but log event first. */
  77
  78 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  79 {
  80         int result;
  81
  82         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  83
  84         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
  85                svc, user);
  86
  87         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  88
  89         return result;
  90 }
  91
  92 static void audit_disconnect(vfs_handle_struct *handle)
  93 {
  94         syslog(audit_syslog_priority(handle), "disconnected\n");
  95         SMB_VFS_NEXT_DISCONNECT(handle);
  96
  97         return;
  98 }
  99
 100 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 101 {
 102         SMB_STRUCT_DIR *result;
 103
 104         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 105
 106         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 107                fname,
 108                (result == NULL) ? "failed: " : "",
 109                (result == NULL) ? strerror(errno) : "");
 110
 111         return result;
 112 }
 113
 114 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 115 {
 116         int result;
 117
 118         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 119
 120         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 121                path,
 122                (result < 0) ? "failed: " : "",
 123                (result < 0) ? strerror(errno) : "");
 124
 125         return result;
 126 }
 127
 128 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 129 {
 130         int result;
 131
 132         result = SMB_VFS_NEXT_RMDIR(handle, path);
 133
 134         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 135                path,
 136                (result < 0) ? "failed: " : "",
 137                (result < 0) ? strerror(errno) : "");
 138
 139         return result;
 140 }
 141
 142 static int audit_open(vfs_handle_struct *handle,
 143                       struct smb_filename *smb_fname, files_struct *fsp,
 144                       int flags, mode_t mode)
 145 {
 146         int result;
 147
 148         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 149
 150         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 151                smb_fname->base_name, result,
 152                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 153                (result < 0) ? "failed: " : "",
 154                (result < 0) ? strerror(errno) : "");
 155
 156         return result;
 157 }
 158
 159 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 160 {
 161         int result;
 162
 163         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 164
 165         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 166                fsp->fh->fd,
 167                (result < 0) ? "failed: " : "",
 168                (result < 0) ? strerror(errno) : "");
 169
 170         return result;
 171 }
 172
 173 static int audit_rename(vfs_handle_struct *handle,
 174                         const struct smb_filename *smb_fname_src,
 175                         const struct smb_filename *smb_fname_dst)
 176 {
 177         int result;
 178
 179         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 180
 181         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 182                smb_fname_src->base_name,
 183                smb_fname_dst->base_name,
 184                (result < 0) ? "failed: " : "",
 185                (result < 0) ? strerror(errno) : "");
 186
 187         return result;
 188 }
 189
 190 static int audit_unlink(vfs_handle_struct *handle,
 191                         const struct smb_filename *smb_fname)
 192 {
 193         int result;
 194
 195         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 196
 197         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 198                smb_fname->base_name,
 199                (result < 0) ? "failed: " : "",
 200                (result < 0) ? strerror(errno) : "");
 201
 202         return result;
 203 }
 204
 205 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 206 {
 207         int result;
 208
 209         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 210
 211         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 212                path, mode,
 213                (result < 0) ? "failed: " : "",
 214                (result < 0) ? strerror(errno) : "");
 215
 216         return result;
 217 }
 218
 219 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 220 {
 221         int result;
 222
 223         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 224
 225         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 226                path, mode,
 227                (result < 0) ? "failed: " : "",
 228                (result < 0) ? strerror(errno) : "");
 229
 230         return result;
 231 }
 232
 233 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 234 {
 235         int result;
 236
 237         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 238
 239         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 240                fsp->fsp_name->base_name, mode,
 241                (result < 0) ? "failed: " : "",
 242                (result < 0) ? strerror(errno) : "");
 243
 244         return result;
 245 }
 246
 247 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 248 {
 249         int result;
 250
 251         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 252
 253         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 254                fsp->fsp_name->base_name, mode,
 255                (result < 0) ? "failed: " : "",
 256                (result < 0) ? strerror(errno) : "");
 257
 258         return result;
 259 }
 260
 261 static struct vfs_fn_pointers vfs_audit_fns = {
 262         .connect_fn = audit_connect,
 263         .disconnect = audit_disconnect,
 264         .opendir = audit_opendir,
 265         .mkdir = audit_mkdir,
 266         .rmdir = audit_rmdir,
 267         .open = audit_open,
 268         .close_fn = audit_close,
 269         .rename = audit_rename,
 270         .unlink = audit_unlink,
 271         .chmod = audit_chmod,
 272         .fchmod = audit_fchmod,
 273         .chmod_acl = audit_chmod_acl,
 274         .fchmod_acl = audit_fchmod_acl
 275 };
 276
 277 NTSTATUS vfs_audit_init(void)
 278 {
 279         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
 280                                 &vfs_audit_fns);
 281 }