From 9e774d4a907e8f3e0e17988b39bef23001aeafe5 Mon Sep 17 00:00:00 2001
From: Luke Leighton <lkcl@samba.org>
Date: Tue, 4 Apr 2000 14:09:36 +0000
Subject: tdb record-level security database (implemented on top of tdb).

designed by andrew and me.  coded by andrew.
---
 source/tdb/tdb_sec.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 source/tdb/tdb_sec.c

diff --git a/source/tdb/tdb_sec.c b/source/tdb/tdb_sec.c
new file mode 100644
index 00000000000..74da4d393fe
--- /dev/null
+++ b/source/tdb/tdb_sec.c
@@ -0,0 +1,133 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 2.0.
+   a tdb database with record level security.
+   Copyright (C) Andrew Tridgell              2000
+   Copyright (C) Luke Kenneth Casson Leighton 2000
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+ *
+ * int tdbsec_set(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA secdata)
+ *
+ *
+ * TDB_DATA tdbsec_fetch(TDB_CONTEXT *tdb, TDB_DATA key, 
+ *                       int (*sec_check)(TDB_DATA , void *), void *arg)
+ *
+ *
+ * int tdbsec_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data,
+ *                  int (*sec_check)(TDB_DATA , void *), void *arg)
+ *
+ */
+
+#include "includes.h"
+
+
+#define SEC_KEY "SEC/"
+#degine SEC_KEY_LEN 4
+
+static TDB_DATA null_data;
+
+static TDB_DATA tdbsec_genkey(TDB_DATA key)
+{
+	TDB_DATA key2;
+
+	key2.dsize = SEC_KEY_LEN+key.dsize;
+	key2.dptr = (char *)malloc(key2.dsize);
+	if (!key2.dptr) return null_data;
+
+	memcpy(key2.dptr, SEC_KEY, SEC_KEY_LEN);
+	memcpy(key2.dptr + SEC_KEY_LEN, key.dptr, key.dsize);
+
+	return key2;
+}
+
+static void tdbsec_free(TDB_DATA d)
+{
+	if (d.dptr) free(d.dptr);
+}
+
+
+TDB_DATA tdbsec_fetch(TDB_CONTEXT *tdb, TDB_DATA key, 
+		      int (*sec_check)(TDB_DATA , void *), void *arg)
+{
+	TDB_DATA key2, data2;
+
+	data2 = null_data;
+
+	key2 = tdbsec_genkey(key);
+	if (!key2.dptr) goto failed;
+
+	data2 = tdb_fetch(tdb, key2);
+
+	if (sec_check(data2, arg) != 0) {
+		goto failed;
+	}
+
+	tdbsec_free(key2);
+	tdbsec_free(data2);
+
+	return tdb_fetch(tdb, key);
+
+ failed:
+	tdbsec_free(key2);
+	tdbsec_free(data2);
+	return null_data;
+}
+
+int tdbsec_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data,
+		 int (*sec_check)(TDB_DATA , void *), void *arg)
+{
+	TDB_DATA key2, data2;
+
+	data2 = null_data;
+
+	key2 = tdbsec_genkey(key);
+	if (!key2.dptr) goto failed;
+
+	data2 = tdb_fetch(tdb, key2);
+
+	if (sec_check(data2, arg) != 0) {
+		goto failed;
+	}
+
+	tdbsec_free(key2);
+	tdbsec_free(data2);
+
+	return tdb_store(tdb, key, data, TDB_REPLACE);
+
+ failed:
+	tdbsec_free(key2);
+	tdbsec_free(data2);
+	return -1;
+}
+
+
+int tdbsec_set(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA secdata)
+{
+	int ret;
+	TDB_DATA key2;
+
+	key2 = tdbsec_genkey(key);
+	if (!key2.dptr) return -1;
+	
+	ret = tdb_store(tdb, key2, secdata, TDB_REPLACE);
+	
+	tdbsec_free(key2);
+	return ret;
+}
+
-- 
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