From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/modules/vfs_audit.c | 355 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 355 insertions(+) create mode 100644 source3/modules/vfs_audit.c (limited to 'source3/modules/vfs_audit.c') diff --git a/source3/modules/vfs_audit.c b/source3/modules/vfs_audit.c new file mode 100644 index 0000000..2b01a6a --- /dev/null +++ b/source3/modules/vfs_audit.c @@ -0,0 +1,355 @@ +/* + * 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 . + */ + + +#include "includes.h" +#include "system/filesys.h" +#include "system/syslog.h" +#include "smbd/smbd.h" +#include "lib/param/loadparm.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_VFS + +static int audit_syslog_facility(vfs_handle_struct *handle) +{ + static const struct enum_list enum_log_facilities[] = { +#ifdef LOG_AUTH + { LOG_AUTH, "AUTH" }, +#endif +#ifdef LOG_AUTHPRIV + { LOG_AUTHPRIV, "AUTHPRIV" }, +#endif +#ifdef LOG_AUDIT + { LOG_AUDIT, "AUDIT" }, +#endif +#ifdef LOG_CONSOLE + { LOG_CONSOLE, "CONSOLE" }, +#endif +#ifdef LOG_CRON + { LOG_CRON, "CRON" }, +#endif +#ifdef LOG_DAEMON + { LOG_DAEMON, "DAEMON" }, +#endif +#ifdef LOG_FTP + { LOG_FTP, "FTP" }, +#endif +#ifdef LOG_INSTALL + { LOG_INSTALL, "INSTALL" }, +#endif +#ifdef LOG_KERN + { LOG_KERN, "KERN" }, +#endif +#ifdef LOG_LAUNCHD + { LOG_LAUNCHD, "LAUNCHD" }, +#endif +#ifdef LOG_LFMT + { LOG_LFMT, "LFMT" }, +#endif +#ifdef LOG_LPR + { LOG_LPR, "LPR" }, +#endif +#ifdef LOG_MAIL + { LOG_MAIL, "MAIL" }, +#endif +#ifdef LOG_MEGASAFE + { LOG_MEGASAFE, "MEGASAFE" }, +#endif +#ifdef LOG_NETINFO + { LOG_NETINFO, "NETINFO" }, +#endif +#ifdef LOG_NEWS + { LOG_NEWS, "NEWS" }, +#endif +#ifdef LOG_NFACILITIES + { LOG_NFACILITIES, "NFACILITIES" }, +#endif +#ifdef LOG_NTP + { LOG_NTP, "NTP" }, +#endif +#ifdef LOG_RAS + { LOG_RAS, "RAS" }, +#endif +#ifdef LOG_REMOTEAUTH + { LOG_REMOTEAUTH, "REMOTEAUTH" }, +#endif +#ifdef LOG_SECURITY + { LOG_SECURITY, "SECURITY" }, +#endif +#ifdef LOG_SYSLOG + { LOG_SYSLOG, "SYSLOG" }, +#endif +#ifdef LOG_USER + { LOG_USER, "USER" }, +#endif +#ifdef LOG_UUCP + { LOG_UUCP, "UUCP" }, +#endif + { LOG_LOCAL0, "LOCAL0" }, + { LOG_LOCAL1, "LOCAL1" }, + { LOG_LOCAL2, "LOCAL2" }, + { LOG_LOCAL3, "LOCAL3" }, + { LOG_LOCAL4, "LOCAL4" }, + { LOG_LOCAL5, "LOCAL5" }, + { LOG_LOCAL6, "LOCAL6" }, + { LOG_LOCAL7, "LOCAL7" }, + { -1, NULL } + }; + + 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" }, + { -1, NULL } + }; + + 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; + + result = SMB_VFS_NEXT_CONNECT(handle, svc, user); + if (result < 0) { + return 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); + + return 0; +} + +static void audit_disconnect(vfs_handle_struct *handle) +{ + syslog(audit_syslog_priority(handle), "disconnected\n"); + SMB_VFS_NEXT_DISCONNECT(handle); + + return; +} + +static int audit_mkdirat(vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + mode_t mode) +{ + struct smb_filename *full_fname = NULL; + int result; + + full_fname = full_path_from_dirfsp_atname(talloc_tos(), + dirfsp, + smb_fname); + if (full_fname == NULL) { + errno = ENOMEM; + return -1; + } + + result = SMB_VFS_NEXT_MKDIRAT(handle, + dirfsp, + smb_fname, + mode); + + syslog(audit_syslog_priority(handle), "mkdirat %s %s%s\n", + full_fname->base_name, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + TALLOC_FREE(full_fname); + return result; +} + +static int audit_openat(vfs_handle_struct *handle, + const struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + struct files_struct *fsp, + const struct vfs_open_how *how) +{ + int result; + + result = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, how); + + syslog(audit_syslog_priority(handle), + "openat %s (fd %d) %s%s%s\n", + fsp_str_dbg(fsp), result, + ((how->flags & O_WRONLY) || (how->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_get_pathref_fd(fsp), + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +static int audit_renameat(vfs_handle_struct *handle, + files_struct *srcfsp, + const struct smb_filename *smb_fname_src, + files_struct *dstfsp, + const struct smb_filename *smb_fname_dst) +{ + struct smb_filename *full_fname_src = NULL; + struct smb_filename *full_fname_dst = NULL; + int result; + int saved_errno = 0; + + full_fname_src = full_path_from_dirfsp_atname(talloc_tos(), + srcfsp, + smb_fname_src); + if (full_fname_src == NULL) { + errno = ENOMEM; + return -1; + } + full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(), + dstfsp, + smb_fname_dst); + if (full_fname_dst == NULL) { + TALLOC_FREE(full_fname_src); + errno = ENOMEM; + return -1; + } + result = SMB_VFS_NEXT_RENAMEAT(handle, + srcfsp, + smb_fname_src, + dstfsp, + smb_fname_dst); + if (result == -1) { + saved_errno = errno; + } + + syslog(audit_syslog_priority(handle), "renameat %s -> %s %s%s\n", + full_fname_src->base_name, + full_fname_dst->base_name, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + TALLOC_FREE(full_fname_src); + TALLOC_FREE(full_fname_dst); + + if (saved_errno != 0) { + errno = saved_errno; + } + + return result; +} + +static int audit_unlinkat(vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + int flags) +{ + struct smb_filename *full_fname = NULL; + int result; + + full_fname = full_path_from_dirfsp_atname(talloc_tos(), + dirfsp, + smb_fname); + if (full_fname == NULL) { + return -1; + } + + result = SMB_VFS_NEXT_UNLINKAT(handle, + dirfsp, + smb_fname, + flags); + + syslog(audit_syslog_priority(handle), "unlinkat %s %s%s\n", + full_fname->base_name, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + TALLOC_FREE(full_fname); + 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->base_name, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +static struct vfs_fn_pointers vfs_audit_fns = { + .connect_fn = audit_connect, + .disconnect_fn = audit_disconnect, + .mkdirat_fn = audit_mkdirat, + .openat_fn = audit_openat, + .close_fn = audit_close, + .renameat_fn = audit_renameat, + .unlinkat_fn = audit_unlinkat, + .fchmod_fn = audit_fchmod, +}; + +static_decl_vfs; +NTSTATUS vfs_audit_init(TALLOC_CTX *ctx) +{ + return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit", + &vfs_audit_fns); +} -- cgit v1.2.3