s3-passdb: trying to decouple passdb and secrets a little.

Guenther

Autobuild-User: Günther Deschner <gd@samba.org>
Autobuild-Date: Wed Jan 18 14:46:18 CET 2012 on sn-devel-104

1 files changed, 137 insertions, 0 deletions

diff --git a/source3/passdb/pdb_secrets.c b/source3/passdb/pdb_secrets.c
new file mode 100644
index 0000000000..30262c999f
--- /dev/null
+++ b/source3/passdb/pdb_secrets.c
@@ -0,0 +1,137 @@
+/*
+   Unix SMB/CIFS implementation.
+   Copyright (C) Andrew Tridgell 1992-2001
+   Copyright (C) Andrew Bartlett      2002
+   Copyright (C) Rafal Szczesniak     2002
+   Copyright (C) Tim Potter           2001
+
+   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/>.
+*/
+
+/* the Samba secrets database stores any generated, private information
+   such as the local SID and machine trust password */
+
+#include "includes.h"
+#include "passdb.h"
+#include "passdb/pdb_secrets.h"
+#include "librpc/gen_ndr/ndr_secrets.h"
+#include "secrets.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "../libcli/security/security.h"
+#include "util_tdb.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
+/**
+ * Get trusted domains info from secrets.tdb.
+ **/
+
+struct list_trusted_domains_state {
+	uint32 num_domains;
+	struct trustdom_info **domains;
+};
+
+static int list_trusted_domain(struct db_record *rec, void *private_data)
+{
+	const size_t prefix_len = strlen(SECRETS_DOMTRUST_ACCT_PASS);
+	struct TRUSTED_DOM_PASS pass;
+	enum ndr_err_code ndr_err;
+	DATA_BLOB blob;
+	struct trustdom_info *dom_info;
+	TDB_DATA key;
+	TDB_DATA value;
+
+	struct list_trusted_domains_state *state =
+		(struct list_trusted_domains_state *)private_data;
+
+	key = dbwrap_record_get_key(rec);
+	value = dbwrap_record_get_value(rec);
+
+	if ((key.dsize < prefix_len)
+	    || (strncmp((char *)key.dptr, SECRETS_DOMTRUST_ACCT_PASS,
+			prefix_len) != 0)) {
+		return 0;
+	}
+
+	blob = data_blob_const(value.dptr, value.dsize);
+
+	ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
+			(ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return false;
+	}
+
+	if (pass.domain_sid.num_auths != 4) {
+		DEBUG(0, ("SID %s is not a domain sid, has %d "
+			  "auths instead of 4\n",
+			  sid_string_dbg(&pass.domain_sid),
+			  pass.domain_sid.num_auths));
+		return 0;
+	}
+
+	if (!(dom_info = talloc(state->domains, struct trustdom_info))) {
+		DEBUG(0, ("talloc failed\n"));
+		return 0;
+	}
+
+	dom_info->name = talloc_strdup(dom_info, pass.uni_name);
+	if (!dom_info->name) {
+		TALLOC_FREE(dom_info);
+		return 0;
+	}
+
+	sid_copy(&dom_info->sid, &pass.domain_sid);
+
+	ADD_TO_ARRAY(state->domains, struct trustdom_info *, dom_info,
+		     &state->domains, &state->num_domains);
+
+	if (state->domains == NULL) {
+		state->num_domains = 0;
+		return -1;
+	}
+	return 0;
+}
+
+NTSTATUS secrets_trusted_domains(TALLOC_CTX *mem_ctx, uint32 *num_domains,
+				 struct trustdom_info ***domains)
+{
+	struct list_trusted_domains_state state;
+	struct db_context *db_ctx;
+
+	if (!secrets_init()) {
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	db_ctx = secrets_db_ctx();
+
+	state.num_domains = 0;
+
+	/*
+	 * Make sure that a talloc context for the trustdom_info structs
+	 * exists
+	 */
+
+	if (!(state.domains = talloc_array(
+		      mem_ctx, struct trustdom_info *, 1))) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	dbwrap_traverse_read(db_ctx, list_trusted_domain, (void *)&state, NULL);
+
+	*num_domains = state.num_domains;
+	*domains = state.domains;
+	return NT_STATUS_OK;
+}