Added audit module that logs info to smbd log file as well as syslog.

(This used to be commit 0ce5f23bdb6796260303b4884b3f62f4329ee6c8)

diff --git a/source3/modules/vfs_extd_audit.c b/source3/modules/vfs_extd_audit.c
new file mode 100644 (file)
index 0000000..f807eb8
--- /dev/null
+++ b/source3/modules/vfs_extd_audit.c
@@ -0,0 +1,318 @@
+/* 
+ * Auditing VFS module for samba.  Log selected file operations to syslog
+ * facility.
+ *
+ * Copyright (C) Tim Potter, 1999-2000
+ * Copyright (C) Alexander Bokovoy, 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <sys/stat.h>
+#ifdef HAVE_UTIME_H
+#include <utime.h>
+#endif
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+#include <syslog.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <errno.h>
+#include <string.h>
+#include <includes.h>
+#include <vfs.h>
+
+#ifndef SYSLOG_FACILITY
+#define SYSLOG_FACILITY   LOG_USER
+#endif
+
+#ifndef SYSLOG_PRIORITY
+#define SYSLOG_PRIORITY   LOG_NOTICE
+#endif
+
+/* Function prototypes */
+
+static int audit_connect(struct connection_struct *conn, const char *svc, const char *user);
+static void audit_disconnect(struct connection_struct *conn);
+static DIR *audit_opendir(struct connection_struct *conn, const char *fname);
+static int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode);
+static int audit_rmdir(struct connection_struct *conn, const char *path);
+static int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode);
+static int audit_close(struct files_struct *fsp, int fd);
+static int audit_rename(struct connection_struct *conn, const char *old, const char *new);
+static int audit_unlink(struct connection_struct *conn, const char *path);
+static int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode);
+static int audit_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode);
+static int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode);
+static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode);
+
+/* VFS operations */
+
+static struct vfs_ops default_vfs_ops;   /* For passthrough operation */
+static struct smb_vfs_handle_struct *audit_handle;
+
+static vfs_op_tuple audit_ops[] = {
+    
+       /* Disk operations */
+
+       {audit_connect,         SMB_VFS_OP_CONNECT,     SMB_VFS_LAYER_LOGGER},
+       {audit_disconnect,      SMB_VFS_OP_DISCONNECT,  SMB_VFS_LAYER_LOGGER},
+
+       /* Directory operations */
+
+       {audit_opendir,         SMB_VFS_OP_OPENDIR,     SMB_VFS_LAYER_LOGGER},
+       {audit_mkdir,           SMB_VFS_OP_MKDIR,       SMB_VFS_LAYER_LOGGER},
+       {audit_rmdir,           SMB_VFS_OP_RMDIR,       SMB_VFS_LAYER_LOGGER},
+
+       /* File operations */
+
+       {audit_open,            SMB_VFS_OP_OPEN,        SMB_VFS_LAYER_LOGGER},
+       {audit_close,           SMB_VFS_OP_CLOSE,       SMB_VFS_LAYER_LOGGER},
+       {audit_rename,          SMB_VFS_OP_RENAME,      SMB_VFS_LAYER_LOGGER},
+       {audit_unlink,          SMB_VFS_OP_UNLINK,      SMB_VFS_LAYER_LOGGER},
+       {audit_chmod,           SMB_VFS_OP_CHMOD,       SMB_VFS_LAYER_LOGGER},
+       {audit_fchmod,          SMB_VFS_OP_FCHMOD,      SMB_VFS_LAYER_LOGGER},
+       {audit_chmod_acl,       SMB_VFS_OP_CHMOD_ACL,   SMB_VFS_LAYER_LOGGER},
+       {audit_fchmod_acl,      SMB_VFS_OP_FCHMOD_ACL,  SMB_VFS_LAYER_LOGGER},
+       
+       /* Finish VFS operations definition */
+       
+       {NULL,                  SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
+};
+
+/* VFS initialisation function.  Return vfs_op_tuple array back to SAMBA. */
+
+vfs_op_tuple *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops, 
+                       struct smb_vfs_handle_struct *vfs_handle)
+{
+       *vfs_version = SMB_VFS_INTERFACE_VERSION;
+       memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
+       
+       audit_handle = vfs_handle;
+
+       openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY);
+       syslog(SYSLOG_PRIORITY, "VFS_INIT: vfs_ops loaded\n");
+
+       return audit_ops;
+}
+
+/* VFS finalization function. */
+
+void vfs_done(connection_struct *conn)
+{
+       syslog(SYSLOG_PRIORITY, "VFS_DONE: vfs module unloaded\n");
+}
+
+/* Implementation of vfs_ops.  Pass everything on to the default
+   operation but log event first. */
+
+static int audit_connect(struct connection_struct *conn, const char *svc, const char *user)
+{
+       syslog(SYSLOG_PRIORITY, "connect to service %s by user %s\n", 
+              svc, user);
+       DEBUG(10, ("Connected to service %s as user %s\n",
+              svc, user));
+
+       return default_vfs_ops.connect(conn, svc, user);
+}
+
+static void audit_disconnect(struct connection_struct *conn)
+{
+       syslog(SYSLOG_PRIORITY, "disconnected\n");
+       DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
+
+       default_vfs_ops.disconnect(conn);
+}
+
+static DIR *audit_opendir(struct connection_struct *conn, const char *fname)
+{
+       DIR *result = default_vfs_ops.opendir(conn, fname);
+
+       syslog(SYSLOG_PRIORITY, "opendir %s %s%s\n",
+              fname,
+              (result == NULL) ? "failed: " : "",
+              (result == NULL) ? strerror(errno) : "");
+       DEBUG(1, ("vfs_extd_audit: opendir %s %s %s",
+              fname,
+              (result == NULL) ? "failed: " : "",
+              (result == NULL) ? strerror(errno) : ""));
+
+       return result;
+}
+
+static int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode)
+{
+       int result = default_vfs_ops.mkdir(conn, path, mode);
+
+       syslog(SYSLOG_PRIORITY, "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(struct connection_struct *conn, const char *path)
+{
+       int result = default_vfs_ops.rmdir(conn, path);
+
+       syslog(SYSLOG_PRIORITY, "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(struct connection_struct *conn, const char *fname, int flags, mode_t mode)
+{
+       int result = default_vfs_ops.open(conn, fname, flags, mode);
+
+       syslog(SYSLOG_PRIORITY, "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(struct files_struct *fsp, int fd)
+{
+       int result = default_vfs_ops.close(fsp, fd);
+
+       syslog(SYSLOG_PRIORITY, "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(struct connection_struct *conn, const char *old, const char *new)
+{
+       int result = default_vfs_ops.rename(conn, old, new);
+
+       syslog(SYSLOG_PRIORITY, "rename %s -> %s %s%s\n",
+              old, new,
+              (result < 0) ? "failed: " : "",
+              (result < 0) ? strerror(errno) : "");
+       DEBUG(1, ("vfs_extd_audit: rename old: %s new: %s  %s %s\n",
+              old, new,
+              (result < 0) ? "failed: " : "",
+              (result < 0) ? strerror(errno) : ""));
+
+       return result;    
+}
+
+static int audit_unlink(struct connection_struct *conn, const char *path)
+{
+       int result = default_vfs_ops.unlink(conn, path);
+
+       syslog(SYSLOG_PRIORITY, "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(struct connection_struct *conn, const char *path, mode_t mode)
+{
+       int result = default_vfs_ops.chmod(conn, path, mode);
+
+       syslog(SYSLOG_PRIORITY, "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(struct connection_struct *conn, const char *path, mode_t mode)
+{
+       int result = default_vfs_ops.chmod_acl(conn, path, mode);
+
+       syslog(SYSLOG_PRIORITY, "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(struct files_struct *fsp, int fd, mode_t mode)
+{
+       int result = default_vfs_ops.fchmod(fsp, fd, mode);
+
+       syslog(SYSLOG_PRIORITY, "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(struct files_struct *fsp, int fd, mode_t mode)
+{
+       int result = default_vfs_ops.fchmod_acl(fsp, fd, mode);
+
+       syslog(SYSLOG_PRIORITY, "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;
+}