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/*
* Auditing VFS module for samba. Log selected file operations to syslog
* facility.
*
* Copyright (C) Tim Potter 1999-2000
* Copyright (C) Alexander Bokovoy 2002
* Copyright (C) Stefan (metze) Metzmacher 2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "system/syslog.h"
#include "smbd/smbd.h"
#include "lib/param/loadparm.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
static int audit_syslog_facility(vfs_handle_struct *handle)
{
static const struct enum_list enum_log_facilities[] = {
#ifdef LOG_AUTH
{ LOG_AUTH, "AUTH" },
#endif
#ifdef LOG_AUTHPRIV
{ LOG_AUTHPRIV, "AUTHPRIV" },
#endif
#ifdef LOG_AUDIT
{ LOG_AUDIT, "AUDIT" },
#endif
#ifdef LOG_CONSOLE
{ LOG_CONSOLE, "CONSOLE" },
#endif
#ifdef LOG_CRON
{ LOG_CRON, "CRON" },
#endif
#ifdef LOG_DAEMON
{ LOG_DAEMON, "DAEMON" },
#endif
#ifdef LOG_FTP
{ LOG_FTP, "FTP" },
#endif
#ifdef LOG_INSTALL
{ LOG_INSTALL, "INSTALL" },
#endif
#ifdef LOG_KERN
{ LOG_KERN, "KERN" },
#endif
#ifdef LOG_LAUNCHD
{ LOG_LAUNCHD, "LAUNCHD" },
#endif
#ifdef LOG_LFMT
{ LOG_LFMT, "LFMT" },
#endif
#ifdef LOG_LPR
{ LOG_LPR, "LPR" },
#endif
#ifdef LOG_MAIL
{ LOG_MAIL, "MAIL" },
#endif
#ifdef LOG_MEGASAFE
{ LOG_MEGASAFE, "MEGASAFE" },
#endif
#ifdef LOG_NETINFO
{ LOG_NETINFO, "NETINFO" },
#endif
#ifdef LOG_NEWS
{ LOG_NEWS, "NEWS" },
#endif
#ifdef LOG_NFACILITIES
{ LOG_NFACILITIES, "NFACILITIES" },
#endif
#ifdef LOG_NTP
{ LOG_NTP, "NTP" },
#endif
#ifdef LOG_RAS
{ LOG_RAS, "RAS" },
#endif
#ifdef LOG_REMOTEAUTH
{ LOG_REMOTEAUTH, "REMOTEAUTH" },
#endif
#ifdef LOG_SECURITY
{ LOG_SECURITY, "SECURITY" },
#endif
#ifdef LOG_SYSLOG
{ LOG_SYSLOG, "SYSLOG" },
#endif
#ifdef LOG_USER
{ LOG_USER, "USER" },
#endif
#ifdef LOG_UUCP
{ LOG_UUCP, "UUCP" },
#endif
{ LOG_LOCAL0, "LOCAL0" },
{ LOG_LOCAL1, "LOCAL1" },
{ LOG_LOCAL2, "LOCAL2" },
{ LOG_LOCAL3, "LOCAL3" },
{ LOG_LOCAL4, "LOCAL4" },
{ LOG_LOCAL5, "LOCAL5" },
{ LOG_LOCAL6, "LOCAL6" },
{ LOG_LOCAL7, "LOCAL7" },
{ -1, NULL }
};
int facility;
facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
return facility;
}
static int audit_syslog_priority(vfs_handle_struct *handle)
{
static const struct enum_list enum_log_priorities[] = {
{ LOG_EMERG, "EMERG" },
{ LOG_ALERT, "ALERT" },
{ LOG_CRIT, "CRIT" },
{ LOG_ERR, "ERR" },
{ LOG_WARNING, "WARNING" },
{ LOG_NOTICE, "NOTICE" },
{ LOG_INFO, "INFO" },
{ LOG_DEBUG, "DEBUG" },
{ -1, NULL }
};
int priority;
priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority",
enum_log_priorities, LOG_NOTICE);
if (priority == -1) {
priority = LOG_WARNING;
}
return priority;
}
/* Implementation of vfs_ops. Pass everything on to the default
operation but log event first. */
static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
{
int result;
result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
if (result < 0) {
return result;
}
openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
svc, user);
return 0;
}
static void audit_disconnect(vfs_handle_struct *handle)
{
syslog(audit_syslog_priority(handle), "disconnected\n");
SMB_VFS_NEXT_DISCONNECT(handle);
return;
}
static DIR *audit_opendir(vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
const char *mask,
uint32_t attr)
{
DIR *result;
result = SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
smb_fname->base_name,
(result == NULL) ? "failed: " : "",
(result == NULL) ? strerror(errno) : "");
return result;
}
static int audit_mkdirat(vfs_handle_struct *handle,
struct files_struct *dirfsp,
const struct smb_filename *smb_fname,
mode_t mode)
{
int result;
result = SMB_VFS_NEXT_MKDIRAT(handle,
dirfsp,
smb_fname,
mode);
syslog(audit_syslog_priority(handle), "mkdirat %s %s%s\n",
smb_fname->base_name,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_open(vfs_handle_struct *handle,
struct smb_filename *smb_fname, files_struct *fsp,
int flags, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
smb_fname->base_name, result,
((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
{
int result;
result = SMB_VFS_NEXT_CLOSE(handle, fsp);
syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
fsp->fh->fd,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_renameat(vfs_handle_struct *handle,
files_struct *srcfsp,
const struct smb_filename *smb_fname_src,
files_struct *dstfsp,
const struct smb_filename *smb_fname_dst)
{
int result;
result = SMB_VFS_NEXT_RENAMEAT(handle,
srcfsp,
smb_fname_src,
dstfsp,
smb_fname_dst);
syslog(audit_syslog_priority(handle), "renameat %s -> %s %s%s\n",
smb_fname_src->base_name,
smb_fname_dst->base_name,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_unlinkat(vfs_handle_struct *handle,
struct files_struct *dirfsp,
const struct smb_filename *smb_fname,
int flags)
{
int result;
result = SMB_VFS_NEXT_UNLINKAT(handle,
dirfsp,
smb_fname,
flags);
syslog(audit_syslog_priority(handle), "unlinkat %s %s%s\n",
smb_fname->base_name,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_chmod(vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
mode_t mode)
{
int result;
result = SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
smb_fname->base_name, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
fsp->fsp_name->base_name, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static struct vfs_fn_pointers vfs_audit_fns = {
.connect_fn = audit_connect,
.disconnect_fn = audit_disconnect,
.opendir_fn = audit_opendir,
.mkdirat_fn = audit_mkdirat,
.open_fn = audit_open,
.close_fn = audit_close,
.renameat_fn = audit_renameat,
.unlinkat_fn = audit_unlinkat,
.chmod_fn = audit_chmod,
.fchmod_fn = audit_fchmod,
};
static_decl_vfs;
NTSTATUS vfs_audit_init(TALLOC_CTX *ctx)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit",
&vfs_audit_fns);
}
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