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-rw-r--r--source3/modules/vfs_audit.c355
1 files changed, 355 insertions, 0 deletions
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 <http://www.gnu.org/licenses/>.
+ */
+
+
+#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);
+}
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