/* * 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); return default_vfs_ops.connect(conn, svc, user); } static void audit_disconnect(struct connection_struct *conn) { syslog(SYSLOG_PRIORITY, "disconnected\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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); return result; }