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                 { LOG_USER, "USER" },
  37                 { LOG_LOCAL0, "LOCAL0" },
  38                 { LOG_LOCAL1, "LOCAL1" },
  39                 { LOG_LOCAL2, "LOCAL2" },
  40                 { LOG_LOCAL3, "LOCAL3" },
  41                 { LOG_LOCAL4, "LOCAL4" },
  42                 { LOG_LOCAL5, "LOCAL5" },
  43                 { LOG_LOCAL6, "LOCAL6" },
  44                 { LOG_LOCAL7, "LOCAL7" },
  45                 { -1, NULL}
  46         };
  47
  48         int facility;
  49
  50         facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
  51
  52         return facility;
  53 }
  54
  55
  56 static int audit_syslog_priority(vfs_handle_struct *handle)
  57 {
  58         static const struct enum_list enum_log_priorities[] = {
  59                 { LOG_EMERG, "EMERG" },
  60                 { LOG_ALERT, "ALERT" },
  61                 { LOG_CRIT, "CRIT" },
  62                 { LOG_ERR, "ERR" },
  63                 { LOG_WARNING, "WARNING" },
  64                 { LOG_NOTICE, "NOTICE" },
  65                 { LOG_INFO, "INFO" },
  66                 { LOG_DEBUG, "DEBUG" },
  67                 { -1, NULL}
  68         };
  69
  70         int priority;
  71
  72         priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority",
  73                                 enum_log_priorities, LOG_NOTICE);
  74         if (priority == -1) {
  75                 priority = LOG_WARNING;
  76         }
  77
  78         return priority;
  79 }
  80
  81 /* Implementation of vfs_ops.  Pass everything on to the default
  82    operation but log event first. */
  83
  84 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
  85 {
  86         int result;
  87
  88         result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
  89         if (result < 0) {
  90                 return result;
  91         }
  92
  93         openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
  94
  95         syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
  96                svc, user);
  97
  98         return 0;
  99 }
 100
 101 static void audit_disconnect(vfs_handle_struct *handle)
 102 {
 103         syslog(audit_syslog_priority(handle), "disconnected\n");
 104         SMB_VFS_NEXT_DISCONNECT(handle);
 105
 106         return;
 107 }
 108
 109 static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 110 {
 111         SMB_STRUCT_DIR *result;
 112
 113         result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
 114
 115         syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
 116                fname,
 117                (result == NULL) ? "failed: " : "",
 118                (result == NULL) ? strerror(errno) : "");
 119
 120         return result;
 121 }
 122
 123 static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 124 {
 125         int result;
 126
 127         result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 128
 129         syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
 130                path,
 131                (result < 0) ? "failed: " : "",
 132                (result < 0) ? strerror(errno) : "");
 133
 134         return result;
 135 }
 136
 137 static int audit_rmdir(vfs_handle_struct *handle, const char *path)
 138 {
 139         int result;
 140
 141         result = SMB_VFS_NEXT_RMDIR(handle, path);
 142
 143         syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
 144                path,
 145                (result < 0) ? "failed: " : "",
 146                (result < 0) ? strerror(errno) : "");
 147
 148         return result;
 149 }
 150
 151 static int audit_open(vfs_handle_struct *handle,
 152                       struct smb_filename *smb_fname, files_struct *fsp,
 153                       int flags, mode_t mode)
 154 {
 155         int result;
 156
 157         result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 158
 159         syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
 160                smb_fname->base_name, result,
 161                ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
 162                (result < 0) ? "failed: " : "",
 163                (result < 0) ? strerror(errno) : "");
 164
 165         return result;
 166 }
 167
 168 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
 169 {
 170         int result;
 171
 172         result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 173
 174         syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
 175                fsp->fh->fd,
 176                (result < 0) ? "failed: " : "",
 177                (result < 0) ? strerror(errno) : "");
 178
 179         return result;
 180 }
 181
 182 static int audit_rename(vfs_handle_struct *handle,
 183                         const struct smb_filename *smb_fname_src,
 184                         const struct smb_filename *smb_fname_dst)
 185 {
 186         int result;
 187
 188         result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
 189
 190         syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
 191                smb_fname_src->base_name,
 192                smb_fname_dst->base_name,
 193                (result < 0) ? "failed: " : "",
 194                (result < 0) ? strerror(errno) : "");
 195
 196         return result;
 197 }
 198
 199 static int audit_unlink(vfs_handle_struct *handle,
 200                         const struct smb_filename *smb_fname)
 201 {
 202         int result;
 203
 204         result = SMB_VFS_NEXT_UNLINK(handle, smb_fname);
 205
 206         syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
 207                smb_fname->base_name,
 208                (result < 0) ? "failed: " : "",
 209                (result < 0) ? strerror(errno) : "");
 210
 211         return result;
 212 }
 213
 214 static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 215 {
 216         int result;
 217
 218         result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
 219
 220         syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
 221                path, mode,
 222                (result < 0) ? "failed: " : "",
 223                (result < 0) ? strerror(errno) : "");
 224
 225         return result;
 226 }
 227
 228 static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 229 {
 230         int result;
 231
 232         result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
 233
 234         syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
 235                path, mode,
 236                (result < 0) ? "failed: " : "",
 237                (result < 0) ? strerror(errno) : "");
 238
 239         return result;
 240 }
 241
 242 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 243 {
 244         int result;
 245
 246         result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
 247
 248         syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
 249                fsp->fsp_name->base_name, mode,
 250                (result < 0) ? "failed: " : "",
 251                (result < 0) ? strerror(errno) : "");
 252
 253         return result;
 254 }
 255
 256 static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
 257 {
 258         int result;
 259
 260         result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
 261
 262         syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
 263                fsp->fsp_name->base_name, mode,
 264                (result < 0) ? "failed: " : "",
 265                (result < 0) ? strerror(errno) : "");
 266
 267         return result;
 268 }
 269
 270 static struct vfs_fn_pointers vfs_audit_fns = {
 271         .connect_fn = audit_connect,
 272         .disconnect = audit_disconnect,
 273         .opendir = audit_opendir,
 274         .mkdir = audit_mkdir,
 275         .rmdir = audit_rmdir,
 276         .open_fn = audit_open,
 277         .close_fn = audit_close,
 278         .rename = audit_rename,
 279         .unlink = audit_unlink,
 280         .chmod = audit_chmod,
 281         .fchmod = audit_fchmod,
 282         .chmod_acl = audit_chmod_acl,
 283         .fchmod_acl = audit_fchmod_acl
 284 };
 285
 286 NTSTATUS vfs_audit_init(void)
 287 {
 288         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
 289                                 &vfs_audit_fns);
 290 }