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         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  83         if (result < 0) {
  84                 return result;
  85         }
  86
  87         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  88
  89         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
  90                svc, user);
  91
  92         return 0;
  93 }
  94
  95 static void audit_disconnect(vfs_handle_struct *handle)
  96 {
  97         syslog(audit_syslog_priority(handle), "disconnected\n");
  98         SMB_VFS_NEXT_DISCONNECT(handle);
  99
 100         return;
 101 }
 102
 103 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 104 {
 105         SMB_STRUCT_DIR *result;
 106
 107         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 108
 109         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 110                fname,
 111                (result == NULL) ? "failed: " : "",
 112                (result == NULL) ? strerror(errno) : "");
 113
 114         return result;
 115 }
 116
 117 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 118 {
 119         int result;
 120
 121         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 122
 123         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 124                path,
 125                (result < 0) ? "failed: " : "",
 126                (result < 0) ? strerror(errno) : "");
 127
 128         return result;
 129 }
 130
 131 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 132 {
 133         int result;
 134
 135         result = SMB_VFS_NEXT_RMDIR(handle, path);
 136
 137         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 138                path,
 139                (result < 0) ? "failed: " : "",
 140                (result < 0) ? strerror(errno) : "");
 141
 142         return result;
 143 }
 144
 145 static int audit_open(vfs_handle_struct *handle,
 146                       struct smb_filename *smb_fname, files_struct *fsp,
 147                       int flags, mode_t mode)
 148 {
 149         int result;
 150
 151         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 152
 153         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 154                smb_fname->base_name, result,
 155                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 156                (result < 0) ? "failed: " : "",
 157                (result < 0) ? strerror(errno) : "");
 158
 159         return result;
 160 }
 161
 162 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 163 {
 164         int result;
 165
 166         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 167
 168         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 169                fsp->fh->fd,
 170                (result < 0) ? "failed: " : "",
 171                (result < 0) ? strerror(errno) : "");
 172
 173         return result;
 174 }
 175
 176 static int audit_rename(vfs_handle_struct *handle,
 177                         const struct smb_filename *smb_fname_src,
 178                         const struct smb_filename *smb_fname_dst)
 179 {
 180         int result;
 181
 182         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 183
 184         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 185                smb_fname_src->base_name,
 186                smb_fname_dst->base_name,
 187                (result < 0) ? "failed: " : "",
 188                (result < 0) ? strerror(errno) : "");
 189
 190         return result;
 191 }
 192
 193 static int audit_unlink(vfs_handle_struct *handle,
 194                         const struct smb_filename *smb_fname)
 195 {
 196         int result;
 197
 198         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 199
 200         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 201                smb_fname->base_name,
 202                (result < 0) ? "failed: " : "",
 203                (result < 0) ? strerror(errno) : "");
 204
 205         return result;
 206 }
 207
 208 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 209 {
 210         int result;
 211
 212         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 213
 214         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 215                path, mode,
 216                (result < 0) ? "failed: " : "",
 217                (result < 0) ? strerror(errno) : "");
 218
 219         return result;
 220 }
 221
 222 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 223 {
 224         int result;
 225
 226         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 227
 228         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 229                path, mode,
 230                (result < 0) ? "failed: " : "",
 231                (result < 0) ? strerror(errno) : "");
 232
 233         return result;
 234 }
 235
 236 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 237 {
 238         int result;
 239
 240         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 241
 242         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 243                fsp->fsp_name->base_name, mode,
 244                (result < 0) ? "failed: " : "",
 245                (result < 0) ? strerror(errno) : "");
 246
 247         return result;
 248 }
 249
 250 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 251 {
 252         int result;
 253
 254         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 255
 256         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 257                fsp->fsp_name->base_name, mode,
 258                (result < 0) ? "failed: " : "",
 259                (result < 0) ? strerror(errno) : "");
 260
 261         return result;
 262 }
 263
 264 static struct vfs_fn_pointers vfs_audit_fns = {
 265         .connect_fn = audit_connect,
 266         .disconnect = audit_disconnect,
 267         .opendir = audit_opendir,
 268         .mkdir = audit_mkdir,
 269         .rmdir = audit_rmdir,
 270         .open = audit_open,
 271         .close_fn = audit_close,
 272         .rename = audit_rename,
 273         .unlink = audit_unlink,
 274         .chmod = audit_chmod,
 275         .fchmod = audit_fchmod,
 276         .chmod_acl = audit_chmod_acl,
 277         .fchmod_acl = audit_fchmod_acl
 278 };
 279
 280 NTSTATUS vfs_audit_init(void)
 281 {
 282         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
 283                                 &vfs_audit_fns);
 284 }