r19573: Move secrets.o into param/ (subsystems haven't been integrated yet).

(This used to be commit 8143de855c0b65346b2d8e59ecdb78952927de4a)

3 files changed, 221 insertions, 0 deletions

diff --git a/source4/param/config.mk b/source4/param/config.mk
index 63609490a3..3406b4f952 100644
--- a/source4/param/config.mk
+++ b/source4/param/config.mk
@@ -44,3 +44,7 @@ PUBLIC_DEPENDENCIES = ldb
 # End MODULE share_ldb
 ################################################
 
+[SUBSYSTEM::SECRETS]
+PRIVATE_PROTO_HEADER = secrets_proto.h
+OBJ_FILES = secrets.o
+PRIVATE_DEPENDENCIES = DB_WRAP UTIL_TDB
diff --git a/source4/param/secrets.c b/source4/param/secrets.c
new file mode 100644
index 0000000000..876be607f1
--- /dev/null
+++ b/source4/param/secrets.c
@@ -0,0 +1,177 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Copyright (C) Andrew Tridgell 1992-2001
+   Copyright (C) Andrew Bartlett      2002
+   Copyright (C) Rafal Szczesniak     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 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.
+*/
+
+/* the Samba secrets database stores any generated, private information
+   such as the local SID and machine trust password */
+
+#include "includes.h"
+#include "secrets.h"
+#include "param/param.h"
+#include "system/filesys.h"
+#include "db_wrap.h"
+#include "lib/ldb/include/ldb.h"
+#include "lib/tdb/include/tdb.h"
+#include "lib/util/util_tdb.h"
+#include "dsdb/samdb/samdb.h"
+
+static struct tdb_wrap *tdb;
+
+/**
+ * Use a TDB to store an incrementing random seed.
+ *
+ * Initialised to the current pid, the very first time Samba starts,
+ * and incremented by one each time it is needed.  
+ * 
+ * @note Not called by systems with a working /dev/urandom.
+ */
+static void get_rand_seed(int *new_seed) 
+{
+	*new_seed = getpid();
+	if (tdb) {
+		tdb_change_int32_atomic(tdb->tdb, "INFO/random_seed", new_seed, 1);
+	}
+}
+
+/* close the secrets database */
+void secrets_shutdown(void)
+{
+       talloc_free(tdb);
+}
+
+/* open up the secrets database */
+BOOL secrets_init(void)
+{
+	char *fname;
+	uint8_t dummy;
+
+	if (tdb)
+		return True;
+
+	asprintf(&fname, "%s/secrets.tdb", lp_private_dir());
+
+	tdb = tdb_wrap_open(talloc_autofree_context(), fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
+
+	if (!tdb) {
+		DEBUG(0,("Failed to open %s\n", fname));
+		SAFE_FREE(fname);
+		return False;
+	}
+	SAFE_FREE(fname);
+
+	/**
+	 * Set a reseed function for the crypto random generator 
+	 * 
+	 * This avoids a problem where systems without /dev/urandom
+	 * could send the same challenge to multiple clients
+	 */
+	set_rand_reseed_callback(get_rand_seed);
+
+	/* Ensure that the reseed is done now, while we are root, etc */
+	generate_random_buffer(&dummy, sizeof(dummy));
+
+	return True;
+}
+
+/*
+  connect to the schannel ldb
+*/
+struct ldb_context *secrets_db_connect(TALLOC_CTX *mem_ctx)
+{
+	char *path;
+	struct ldb_context *ldb;
+	BOOL existed;
+	const char *init_ldif = 
+		"dn: @ATTRIBUTES\n" \
+		"computerName: CASE_INSENSITIVE\n" \
+		"flatname: CASE_INSENSITIVE\n";
+
+	path = private_path(mem_ctx, "secrets.ldb");
+	if (!path) {
+		return NULL;
+	}
+	
+	existed = file_exist(path);
+
+	/* Secrets.ldb *must* always be local.  If we call for a
+	 * system_session() we will recurse */
+	ldb = ldb_wrap_connect(mem_ctx, path, NULL, NULL, 0, NULL);
+	talloc_free(path);
+	if (!ldb) {
+		return NULL;
+	}
+	
+	if (!existed) {
+		gendb_add_ldif(ldb, init_ldif);
+	}
+
+	return ldb;
+}
+
+struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx,
+				       const char *domain)
+{
+	struct ldb_context *ldb;
+	struct ldb_message **msgs;
+	int ldb_ret;
+	const char *attrs[] = { "objectSid", NULL };
+	struct dom_sid *result = NULL;
+
+	ldb = secrets_db_connect(mem_ctx);
+	if (ldb == NULL) {
+		DEBUG(5, ("secrets_db_connect failed\n"));
+		return NULL;
+	}
+
+	ldb_ret = gendb_search(ldb, ldb,
+			       ldb_dn_explode(mem_ctx, SECRETS_PRIMARY_DOMAIN_DN), 
+			       &msgs, attrs,
+			       SECRETS_PRIMARY_DOMAIN_FILTER, domain);
+
+	if (ldb_ret == -1) {
+		DEBUG(5, ("Error searching for domain SID for %s: %s", 
+			  domain, ldb_errstring(ldb))); 
+		talloc_free(ldb);
+		return NULL;
+	}
+
+	if (ldb_ret == 0) {
+		DEBUG(5, ("Did not find domain record for %s\n", domain));
+		talloc_free(ldb);
+		return NULL;
+	}
+
+	if (ldb_ret > 1) {
+		DEBUG(5, ("Found more than one (%d) domain records for %s\n",
+			  ldb_ret, domain));
+		talloc_free(ldb);
+		return NULL;
+	}
+
+	result = samdb_result_dom_sid(mem_ctx, msgs[0], "objectSid");
+	if (result == NULL) {
+		DEBUG(0, ("Domain object for %s does not contain a SID!\n",
+			  domain));
+		talloc_free(ldb);
+		return NULL;
+	}
+
+	return result;
+}
diff --git a/source4/param/secrets.h b/source4/param/secrets.h
new file mode 100644
index 0000000000..8ef7ec5f78
--- /dev/null
+++ b/source4/param/secrets.h
@@ -0,0 +1,40 @@
+/*
+ * Unix SMB/CIFS implementation. 
+ * secrets.tdb file format info
+ * Copyright (C) Andrew Tridgell              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.  
+ */
+
+#ifndef _SECRETS_H
+#define _SECRETS_H
+
+/* structure for storing machine account password
+   (ie. when samba server is member of a domain */
+struct machine_acct_pass {
+	uint8_t hash[16];
+	time_t mod_time;
+};
+
+#define SECRETS_PRIMARY_DOMAIN_DN "cn=Primary Domains"
+#define SECRETS_PRINCIPALS_DN "cn=Principals"
+#define SECRETS_PRIMARY_DOMAIN_FILTER "(&(flatname=%s)(objectclass=primaryDomain))"
+#define SECRETS_PRIMARY_REALM_FILTER "(&(realm=%s)(objectclass=primaryDomain))"
+#define SECRETS_KRBTGT_SEARCH "(&((|(realm=%s)(flatname=%s))(samAccountName=krbtgt)))"
+#define SECRETS_PRINCIPAL_SEARCH "(&(|(realm=%s)(flatname=%s))(servicePrincipalName=%s))"
+
+#include "param/secrets_proto.h"
+
+#endif /* _SECRETS_H */