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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) John H Terpstra, 2003
* Copyright (C) Stefan (metze) Metzmacher, 2003
*
* 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"
static int vfs_extd_audit_debug_level = DBGC_VFS;
#undef DBGC_CLASS
#define DBGC_CLASS vfs_extd_audit_debug_level
/* Function prototypes */
static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
static void audit_disconnect(vfs_handle_struct *handle);
static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
static int audit_rmdir(vfs_handle_struct *handle, const char *path);
static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd);
static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
static int audit_unlink(vfs_handle_struct *handle, const char *path);
static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
/* VFS operations */
static vfs_op_tuple audit_op_tuples[] = {
/* Disk operations */
{SMB_VFS_OP(audit_connect), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_disconnect), SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER},
/* Directory operations */
{SMB_VFS_OP(audit_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER},
/* File operations */
{SMB_VFS_OP(audit_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_close), SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_fchmod), SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER},
{SMB_VFS_OP(audit_fchmod_acl), SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER},
/* Finish VFS operations definition */
{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
static int audit_syslog_facility(vfs_handle_struct *handle)
{
static const struct enum_list enum_log_facilities[] = {
{ LOG_USER, "USER" },
{ LOG_LOCAL0, "LOCAL0" },
{ LOG_LOCAL1, "LOCAL1" },
{ LOG_LOCAL2, "LOCAL2" },
{ LOG_LOCAL3, "LOCAL3" },
{ LOG_LOCAL4, "LOCAL4" },
{ LOG_LOCAL5, "LOCAL5" },
{ LOG_LOCAL6, "LOCAL6" },
{ LOG_LOCAL7, "LOCAL7" }
};
int facility;
facility = lp_parm_enum(SNUM(handle->conn), "extd_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" }
};
int priority;
priority = lp_parm_enum(SNUM(handle->conn), "extd_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;
openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
svc, user);
DEBUG(10, ("Connected to service %s as user %s\n",
svc, user));
result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
return result;
}
static void audit_disconnect(vfs_handle_struct *handle)
{
syslog(audit_syslog_priority(handle), "disconnected\n");
DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
SMB_VFS_NEXT_DISCONNECT(handle);
return;
}
static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
{
SMB_STRUCT_DIR *result;
result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
fname,
(result == NULL) ? "failed: " : "",
(result == NULL) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: opendir %s %s %s\n",
fname,
(result == NULL) ? "failed: " : "",
(result == NULL) ? strerror(errno) : ""));
return result;
}
static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_rmdir(vfs_handle_struct *handle, const char *path)
{
int result;
result = SMB_VFS_NEXT_RMDIR(handle, path);
syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
fname, result,
((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(2, ("vfs_extd_audit: open %s %s %s\n",
fname,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_close(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
int result;
result = SMB_VFS_NEXT_CLOSE(handle, fsp, fd);
syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
fd,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
fd,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
{
int result;
result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
oldname, newname,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s %s %s\n",
oldname, newname,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_unlink(vfs_handle_struct *handle, const char *path)
{
int result;
result = SMB_VFS_NEXT_UNLINK(handle, path);
syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
path, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n",
path, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
path, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n",
path, 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, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s",
fsp->fsp_name, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
{
int result;
result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
fsp->fsp_name, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s",
fsp->fsp_name, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : ""));
return result;
}
NTSTATUS vfs_extd_audit_init(void);
NTSTATUS vfs_extd_audit_init(void)
{
NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_op_tuples);
if (!NT_STATUS_IS_OK(ret))
return ret;
vfs_extd_audit_debug_level = debug_add_class("extd_audit");
if (vfs_extd_audit_debug_level == -1) {
vfs_extd_audit_debug_level = DBGC_VFS;
DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
} else {
DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));
}
return ret;
}
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