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
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS DBGC_VFS
  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), "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), "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         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  86         if (result < 0) {
  87                 return result;
  88         }
  89
  90         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  91
  92         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
  93                svc, user);
  94
  95         return 0;
  96 }
  97
  98 static void audit_disconnect(vfs_handle_struct *handle)
  99 {
 100         syslog(audit_syslog_priority(handle), "disconnected\n");
 101         SMB_VFS_NEXT_DISCONNECT(handle);
 102
 103         return;
 104 }
 105
 106 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 107 {
 108         SMB_STRUCT_DIR *result;
 109
 110         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 111
 112         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 113                fname,
 114                (result == NULL) ? "failed: " : "",
 115                (result == NULL) ? strerror(errno) : "");
 116
 117         return result;
 118 }
 119
 120 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 121 {
 122         int result;
 123
 124         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 125
 126         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 127                path,
 128                (result < 0) ? "failed: " : "",
 129                (result < 0) ? strerror(errno) : "");
 130
 131         return result;
 132 }
 133
 134 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 135 {
 136         int result;
 137
 138         result = SMB_VFS_NEXT_RMDIR(handle, path);
 139
 140         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 141                path,
 142                (result < 0) ? "failed: " : "",
 143                (result < 0) ? strerror(errno) : "");
 144
 145         return result;
 146 }
 147
 148 static int audit_open(vfs_handle_struct *handle,
 149                       struct smb_filename *smb_fname, files_struct *fsp,
 150                       int flags, mode_t mode)
 151 {
 152         int result;
 153
 154         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 155
 156         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 157                smb_fname->base_name, result,
 158                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 159                (result < 0) ? "failed: " : "",
 160                (result < 0) ? strerror(errno) : "");
 161
 162         return result;
 163 }
 164
 165 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 166 {
 167         int result;
 168
 169         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 170
 171         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 172                fsp->fh->fd,
 173                (result < 0) ? "failed: " : "",
 174                (result < 0) ? strerror(errno) : "");
 175
 176         return result;
 177 }
 178
 179 static int audit_rename(vfs_handle_struct *handle,
 180                         const struct smb_filename *smb_fname_src,
 181                         const struct smb_filename *smb_fname_dst)
 182 {
 183         int result;
 184
 185         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 186
 187         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 188                smb_fname_src->base_name,
 189                smb_fname_dst->base_name,
 190                (result < 0) ? "failed: " : "",
 191                (result < 0) ? strerror(errno) : "");
 192
 193         return result;
 194 }
 195
 196 static int audit_unlink(vfs_handle_struct *handle,
 197                         const struct smb_filename *smb_fname)
 198 {
 199         int result;
 200
 201         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 202
 203         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 204                smb_fname->base_name,
 205                (result < 0) ? "failed: " : "",
 206                (result < 0) ? strerror(errno) : "");
 207
 208         return result;
 209 }
 210
 211 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 212 {
 213         int result;
 214
 215         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 216
 217         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 218                path, mode,
 219                (result < 0) ? "failed: " : "",
 220                (result < 0) ? strerror(errno) : "");
 221
 222         return result;
 223 }
 224
 225 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 226 {
 227         int result;
 228
 229         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 230
 231         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 232                path, mode,
 233                (result < 0) ? "failed: " : "",
 234                (result < 0) ? strerror(errno) : "");
 235
 236         return result;
 237 }
 238
 239 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 240 {
 241         int result;
 242
 243         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 244
 245         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 246                fsp->fsp_name->base_name, mode,
 247                (result < 0) ? "failed: " : "",
 248                (result < 0) ? strerror(errno) : "");
 249
 250         return result;
 251 }
 252
 253 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 254 {
 255         int result;
 256
 257         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 258
 259         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 260                fsp->fsp_name->base_name, mode,
 261                (result < 0) ? "failed: " : "",
 262                (result < 0) ? strerror(errno) : "");
 263
 264         return result;
 265 }
 266
 267 static struct vfs_fn_pointers vfs_audit_fns = {
 268         .connect_fn = audit_connect,
 269         .disconnect = audit_disconnect,
 270         .opendir = audit_opendir,
 271         .mkdir = audit_mkdir,
 272         .rmdir = audit_rmdir,
 273         .open = audit_open,
 274         .close_fn = audit_close,
 275         .rename = audit_rename,
 276         .unlink = audit_unlink,
 277         .chmod = audit_chmod,
 278         .fchmod = audit_fchmod,
 279         .chmod_acl = audit_chmod_acl,
 280         .fchmod_acl = audit_fchmod_acl
 281 };
 282
 283 NTSTATUS vfs_audit_init(void)
 284 {
 285         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
 286                                 &vfs_audit_fns);
 287 }