/* * 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" #undef DBGC_CLASS #define DBGC_CLASS DBGC_VFS /* 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); 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), "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), "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); 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"); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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_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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); 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) : ""); return result; } NTSTATUS vfs_audit_init(void); NTSTATUS vfs_audit_init(void) { return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit", audit_op_tuples); }