/* * 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 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 = SMB_VFS_NEXT_CONNECT(handle, svc, user); if (result < 0) { return result; } openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle)); if (lp_syslog() > 0) { 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)); return 0; } static void audit_disconnect(vfs_handle_struct *handle) { if (lp_syslog() > 0) { 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); if (lp_syslog() > 0) { 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); if (lp_syslog() > 0) { 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); if (lp_syslog() > 0) { 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, 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); if (lp_syslog() > 0) { 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) : ""); } DEBUG(2, ("vfs_extd_audit: open %s %s %s\n", smb_fname_str_dbg(smb_fname), (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); if (lp_syslog() > 0) { syslog(audit_syslog_priority(handle), "close fd %d %s%s\n", fsp->fh->fd, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : ""); } DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n", fsp->fh->fd, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : "")); return result; } static int audit_rename(vfs_handle_struct *handle, const struct smb_filename *smb_fname_src, const struct smb_filename *smb_fname_dst) { int result; result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst); if (lp_syslog() > 0) { syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n", smb_fname_src->base_name, smb_fname_dst->base_name, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : ""); } DEBUG(1, ("vfs_extd_audit: rename old: %s newname: %s %s %s\n", smb_fname_str_dbg(smb_fname_src), smb_fname_str_dbg(smb_fname_dst), (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : "")); return result; } static int audit_unlink(vfs_handle_struct *handle, const struct smb_filename *smb_fname) { int result; result = SMB_VFS_NEXT_UNLINK(handle, smb_fname); if (lp_syslog() > 0) { syslog(audit_syslog_priority(handle), "unlink %s %s%s\n", smb_fname->base_name, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : ""); } DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n", smb_fname_str_dbg(smb_fname), (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); if (lp_syslog() > 0) { 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, (unsigned int)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); if (lp_syslog() > 0) { 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, (unsigned int)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); if (lp_syslog() > 0) { 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) : ""); } DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s", fsp_str_dbg(fsp), (unsigned int)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); if (lp_syslog() > 0) { syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n", fsp->fsp_name->base_name, mode, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : ""); } DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s", fsp_str_dbg(fsp), (unsigned int)mode, (result < 0) ? "failed: " : "", (result < 0) ? strerror(errno) : "")); return result; } static struct vfs_fn_pointers vfs_extd_audit_fns = { .connect_fn = audit_connect, .disconnect = audit_disconnect, .opendir = audit_opendir, .mkdir = audit_mkdir, .rmdir = audit_rmdir, .open = audit_open, .close_fn = audit_close, .rename = audit_rename, .unlink = audit_unlink, .chmod = audit_chmod, .fchmod = audit_fchmod, .chmod_acl = audit_chmod_acl, .fchmod_acl = audit_fchmod_acl, }; NTSTATUS vfs_extd_audit_init(void) { NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", &vfs_extd_audit_fns); 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; }