Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 442 insertions, 0 deletions

diff --git a/source3/winbindd/idmap_tdb.c b/source3/winbindd/idmap_tdb.c
new file mode 100644
index 0000000..ac0dbec
--- /dev/null
+++ b/source3/winbindd/idmap_tdb.c
@@ -0,0 +1,442 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   idmap TDB backend
+
+   Copyright (C) Tim Potter 2000
+   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+   Copyright (C) Jeremy Allison 2006
+   Copyright (C) Simo Sorce 2003-2006
+   Copyright (C) Michael Adam 2009-2010
+
+   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 "winbindd.h"
+#include "idmap.h"
+#include "idmap_rw.h"
+#include "idmap_tdb_common.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "../libcli/security/security.h"
+#include "util_tdb.h"
+#include "lib/util/string_wrappers.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_IDMAP
+
+/* idmap version determines auto-conversion - this is the database
+   structure version specifier. */
+
+#define IDMAP_VERSION 2
+
+/* High water mark keys */
+#define HWM_GROUP  "GROUP HWM"
+#define HWM_USER   "USER HWM"
+
+struct convert_fn_state {
+	struct db_context *db;
+	bool failed;
+};
+
+/*****************************************************************************
+ For idmap conversion: convert one record to new format
+ Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
+ instead of the SID.
+*****************************************************************************/
+static int convert_fn(struct db_record *rec, void *private_data)
+{
+	struct winbindd_domain *domain;
+	char *p;
+	NTSTATUS status;
+	struct dom_sid sid;
+	uint32_t rid;
+	struct dom_sid_buf keystr;
+	fstring dom_name;
+	TDB_DATA key;
+	TDB_DATA key2;
+	TDB_DATA value;
+	struct convert_fn_state *s = (struct convert_fn_state *)private_data;
+
+	key = dbwrap_record_get_key(rec);
+
+	DEBUG(10,("Converting %s\n", (const char *)key.dptr));
+
+	p = strchr((const char *)key.dptr, '/');
+	if (!p)
+		return 0;
+
+	*p = 0;
+	fstrcpy(dom_name, (const char *)key.dptr);
+	*p++ = '/';
+
+	domain = find_domain_from_name(dom_name);
+	if (domain == NULL) {
+		/* We must delete the old record. */
+		DEBUG(0,("Unable to find domain %s\n", dom_name ));
+		DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
+
+		status = dbwrap_record_delete(rec);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0, ("Unable to delete record %s:%s\n",
+				(const char *)key.dptr,
+				nt_errstr(status)));
+			s->failed = true;
+			return -1;
+		}
+
+		return 0;
+	}
+
+	rid = atoi(p);
+
+	sid_compose(&sid, &domain->sid, rid);
+
+	key2 = string_term_tdb_data(dom_sid_str_buf(&sid, &keystr));
+
+	value = dbwrap_record_get_value(rec);
+
+	status = dbwrap_store(s->db, key2, value, TDB_INSERT);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("Unable to add record %s:%s\n",
+			(const char *)key2.dptr,
+			nt_errstr(status)));
+		s->failed = true;
+		return -1;
+	}
+
+	status = dbwrap_store(s->db, value, key2, TDB_REPLACE);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("Unable to update record %s:%s\n",
+			(const char *)value.dptr,
+			nt_errstr(status)));
+		s->failed = true;
+		return -1;
+	}
+
+	status = dbwrap_record_delete(rec);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("Unable to delete record %s:%s\n",
+			(const char *)key.dptr,
+			nt_errstr(status)));
+		s->failed = true;
+		return -1;
+	}
+
+	return 0;
+}
+
+/*****************************************************************************
+ Convert the idmap database from an older version.
+*****************************************************************************/
+
+static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
+{
+	int32_t vers;
+	struct convert_fn_state s;
+	NTSTATUS status;
+
+	status = dbwrap_fetch_int32_bystring(db, "IDMAP_VERSION", &vers);
+	if (!NT_STATUS_IS_OK(status)) {
+		vers = -1;
+	}
+
+	if (IREV(vers) == IDMAP_VERSION) {
+		/* Arrggghh ! Bytereversed - make order independent ! */
+		/*
+		 * high and low records were created on a
+		 * big endian machine and will need byte-reversing.
+		 */
+
+		int32_t wm;
+
+		status = dbwrap_fetch_int32_bystring(db, HWM_USER, &wm);
+		if (!NT_STATUS_IS_OK(status)) {
+			wm = -1;
+		}
+
+		if (wm != -1) {
+			wm = IREV(wm);
+		}  else {
+			wm = dom->low_id;
+		}
+
+		status = dbwrap_store_int32_bystring(db, HWM_USER, wm);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0, ("Unable to byteswap user hwm in idmap "
+				  "database: %s\n", nt_errstr(status)));
+			return False;
+		}
+
+		status = dbwrap_fetch_int32_bystring(db, HWM_GROUP, &wm);
+		if (!NT_STATUS_IS_OK(status)) {
+			wm = -1;
+		}
+
+		if (wm != -1) {
+			wm = IREV(wm);
+		} else {
+			wm = dom->low_id;
+		}
+
+		status = dbwrap_store_int32_bystring(db, HWM_GROUP, wm);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0, ("Unable to byteswap group hwm in idmap "
+				  "database: %s\n", nt_errstr(status)));
+			return False;
+		}
+	}
+
+	s.db = db;
+	s.failed = false;
+
+	/* the old format stored as DOMAIN/rid - now we store the SID direct */
+	status = dbwrap_traverse(db, convert_fn, &s, NULL);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Database traverse failed during conversion\n"));
+		return false;
+	}
+
+	if (s.failed) {
+		DEBUG(0, ("Problem during conversion\n"));
+		return False;
+	}
+
+	status = dbwrap_store_int32_bystring(db, "IDMAP_VERSION",
+					     IDMAP_VERSION);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Unable to store idmap version in database: %s\n",
+			  nt_errstr(status)));
+		return False;
+	}
+
+	return True;
+}
+
+static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
+{
+	uint32_t low_uid;
+	uint32_t low_gid;
+	bool update_uid = false;
+	bool update_gid = false;
+	struct idmap_tdb_common_context *ctx;
+	NTSTATUS status;
+
+	ctx = talloc_get_type(dom->private_data,
+			      struct idmap_tdb_common_context);
+
+	status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_USER, &low_uid);
+	if (!NT_STATUS_IS_OK(status) || low_uid < dom->low_id) {
+		update_uid = true;
+	}
+
+	status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_GROUP, &low_gid);
+	if (!NT_STATUS_IS_OK(status) || low_gid < dom->low_id) {
+		update_gid = true;
+	}
+
+	if (!update_uid && !update_gid) {
+		return NT_STATUS_OK;
+	}
+
+	if (dbwrap_transaction_start(ctx->db) != 0) {
+		DEBUG(0, ("Unable to start upgrade transaction!\n"));
+		return NT_STATUS_INTERNAL_DB_ERROR;
+	}
+
+	if (update_uid) {
+		status = dbwrap_store_uint32_bystring(ctx->db, HWM_USER,
+						      dom->low_id);
+		if (!NT_STATUS_IS_OK(status)) {
+			dbwrap_transaction_cancel(ctx->db);
+			DEBUG(0, ("Unable to initialise user hwm in idmap "
+				  "database: %s\n", nt_errstr(status)));
+			return NT_STATUS_INTERNAL_DB_ERROR;
+		}
+	}
+
+	if (update_gid) {
+		status = dbwrap_store_uint32_bystring(ctx->db, HWM_GROUP,
+						      dom->low_id);
+		if (!NT_STATUS_IS_OK(status)) {
+			dbwrap_transaction_cancel(ctx->db);
+			DEBUG(0, ("Unable to initialise group hwm in idmap "
+				  "database: %s\n", nt_errstr(status)));
+			return NT_STATUS_INTERNAL_DB_ERROR;
+		}
+	}
+
+	if (dbwrap_transaction_commit(ctx->db) != 0) {
+		DEBUG(0, ("Unable to commit upgrade transaction!\n"));
+		return NT_STATUS_INTERNAL_DB_ERROR;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
+{
+	NTSTATUS ret;
+	TALLOC_CTX *mem_ctx;
+	char *tdbfile = NULL;
+	struct db_context *db = NULL;
+	int32_t version;
+	bool config_error = false;
+	struct idmap_tdb_common_context *ctx;
+
+	ctx = talloc_get_type(dom->private_data,
+			      struct idmap_tdb_common_context);
+
+	if (ctx->db) {
+		/* it is already open */
+		return NT_STATUS_OK;
+	}
+
+	/* use our own context here */
+	mem_ctx = talloc_stackframe();
+
+	/* use the old database if present */
+	tdbfile = state_path(talloc_tos(), "winbindd_idmap.tdb");
+	if (!tdbfile) {
+		DEBUG(0, ("Out of memory!\n"));
+		ret = NT_STATUS_NO_MEMORY;
+		goto done;
+	}
+
+	DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
+
+	/* Open idmap repository */
+	db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
+		     DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+	if (!db) {
+		DEBUG(0, ("Unable to open idmap database\n"));
+		ret = NT_STATUS_UNSUCCESSFUL;
+		goto done;
+	}
+
+	/* check against earlier versions */
+	ret = dbwrap_fetch_int32_bystring(db, "IDMAP_VERSION", &version);
+	if (!NT_STATUS_IS_OK(ret)) {
+		version = -1;
+	}
+
+	if (version != IDMAP_VERSION) {
+		if (config_error) {
+			DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
+				 "possible with incomplete configuration\n",
+				 version, IDMAP_VERSION));
+			ret = NT_STATUS_UNSUCCESSFUL;
+			goto done;
+		}
+		if (dbwrap_transaction_start(db) != 0) {
+			DEBUG(0, ("Unable to start upgrade transaction!\n"));
+			ret = NT_STATUS_INTERNAL_DB_ERROR;
+			goto done;
+		}
+
+		if (!idmap_tdb_upgrade(dom, db)) {
+			dbwrap_transaction_cancel(db);
+			DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
+			ret = NT_STATUS_INTERNAL_DB_ERROR;
+			goto done;
+		}
+
+		if (dbwrap_transaction_commit(db) != 0) {
+			DEBUG(0, ("Unable to commit upgrade transaction!\n"));
+			ret = NT_STATUS_INTERNAL_DB_ERROR;
+			goto done;
+		}
+	}
+
+	ctx->db = talloc_move(ctx, &db);
+
+	ret = idmap_tdb_init_hwm(dom);
+
+done:
+	talloc_free(mem_ctx);
+	return ret;
+}
+
+/**********************************************************************
+ IDMAP MAPPING TDB BACKEND
+**********************************************************************/
+
+/*****************************
+ Initialise idmap database. 
+*****************************/
+
+static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
+{
+	NTSTATUS ret;
+	struct idmap_tdb_common_context *ctx;
+
+	DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
+
+	ctx = talloc_zero(dom, struct idmap_tdb_common_context);
+	if ( ! ctx) {
+		DEBUG(0, ("Out of memory!\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* load backend specific configuration here: */
+#if 0
+	if (strequal(dom->name, "*")) {
+	} else {
+	}
+#endif
+
+	ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
+	if (ctx->rw_ops == NULL) {
+		DEBUG(0, ("Out of memory!\n"));
+		ret = NT_STATUS_NO_MEMORY;
+		goto failed;
+	}
+
+	ctx->max_id = dom->high_id;
+	ctx->hwmkey_uid = HWM_USER;
+	ctx->hwmkey_gid = HWM_GROUP;
+
+	ctx->rw_ops->get_new_id = idmap_tdb_common_get_new_id;
+	ctx->rw_ops->set_mapping = idmap_tdb_common_set_mapping;
+
+	dom->private_data = ctx;
+
+	ret = idmap_tdb_open_db(dom);
+	if ( ! NT_STATUS_IS_OK(ret)) {
+		goto failed;
+	}
+
+	return NT_STATUS_OK;
+
+failed:
+	talloc_free(ctx);
+	return ret;
+}
+
+static const struct idmap_methods db_methods = {
+	.init = idmap_tdb_db_init,
+	.unixids_to_sids = idmap_tdb_common_unixids_to_sids,
+	.sids_to_unixids = idmap_tdb_common_sids_to_unixids,
+	.allocate_id = idmap_tdb_common_get_new_id,
+};
+
+NTSTATUS idmap_tdb_init(TALLOC_CTX *mem_ctx)
+{
+	DEBUG(10, ("calling idmap_tdb_init\n"));
+
+	return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
+}