Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 418 insertions, 0 deletions

diff --git a/source3/modules/vfs_extd_audit.c b/source3/modules/vfs_extd_audit.c
new file mode 100644
index 0000000..ea784ff
--- /dev/null
+++ b/source3/modules/vfs_extd_audit.c
@@ -0,0 +1,418 @@
+/* 
+ * 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"
+#include "system/filesys.h"
+#include "system/syslog.h"
+#include "smbd/smbd.h"
+#include "lib/param/loadparm.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[] = {
+#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), "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" },
+		{ -1, NULL }
+	};
+
+	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 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);
+
+	if (lp_syslog() > 0) {
+		syslog(audit_syslog_priority(handle), "mkdirat %s %s%s\n",
+		       full_fname->base_name,
+		       (result < 0) ? "failed: " : "",
+		       (result < 0) ? strerror(errno) : "");
+	}
+	DEBUG(0, ("vfs_extd_audit: 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,
+			files_struct *fsp,
+			const struct vfs_open_how *how)
+{
+	int ret;
+
+	ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, how);
+
+	if (lp_syslog() > 0) {
+		syslog(audit_syslog_priority(handle),
+		       "openat %s/%s (fd %d) %s%s%s\n",
+		       smb_fname_str_dbg(fsp->fsp_name),
+		       smb_fname->base_name,
+		       ret,
+		       ((how->flags & O_WRONLY) || (how->flags & O_RDWR)) ?
+		       "for writing " : "",
+		       (ret < 0) ? "failed: " : "",
+		       (ret < 0) ? strerror(errno) : "");
+	}
+	DEBUG(2, ("vfs_extd_audit: open %s/%s %s %s\n",
+	       smb_fname_str_dbg(fsp->fsp_name),
+	       smb_fname_str_dbg(smb_fname),
+	       (ret < 0) ? "failed: " : "",
+	       (ret < 0) ? strerror(errno) : ""));
+
+	return ret;
+}
+
+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_get_pathref_fd(fsp),
+		       (result < 0) ? "failed: " : "",
+		       (result < 0) ? strerror(errno) : "");
+	}
+	DEBUG(2, ("vfs_extd_audit: 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;
+	}
+	if (lp_syslog() > 0) {
+		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(saved_errno) : "");
+	}
+	DEBUG(1, ("vfs_extd_audit: renameat old: %s newname: %s  %s %s\n",
+		smb_fname_str_dbg(full_fname_src),
+		smb_fname_str_dbg(full_fname_dst),
+	       (result < 0) ? "failed: " : "",
+	       (result < 0) ? strerror(saved_errno) : ""));
+
+	TALLOC_FREE(full_fname_src);
+	TALLOC_FREE(full_fname_dst);
+
+	if (result == -1)  {
+		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);
+
+	if (lp_syslog() > 0) {
+		syslog(audit_syslog_priority(handle), "unlinkat %s %s%s\n",
+		       full_fname->base_name,
+		       (result < 0) ? "failed: " : "",
+		       (result < 0) ? strerror(errno) : "");
+	}
+	DBG_ERR("unlinkat %s %s %s\n",
+	       smb_fname_str_dbg(full_fname),
+	       (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);
+
+	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\n",
+	       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_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_extd_audit_init(TALLOC_CTX *ctx)
+{
+	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;
+}