Move reg_frontend_hilvl.c to reg_dispatcher.c

This is actually the dispatcher to the registered registry backends.

Michael
(This used to be commit 39d65d11f8eff0aff998d5bfed8480b0f00655bd)

1 files changed, 235 insertions, 0 deletions

diff --git a/source3/registry/reg_dispatcher.c b/source3/registry/reg_dispatcher.c
new file mode 100644
index 0000000000..e6e7613457
--- /dev/null
+++ b/source3/registry/reg_dispatcher.c
@@ -0,0 +1,235 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Virtual Windows Registry Layer
+ *  Copyright (C) Gerald Carter                     2002-2005
+ *  Copyright (C) Michael Adam                      2006-2008
+ *
+ *  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/>.
+ */
+
+/*
+ * Implementation of registry frontend view functions.
+ * Functions moved from reg_frontend.c to minimize linker deps.
+ */
+
+#include "includes.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_REGISTRY
+
+static const struct generic_mapping reg_generic_map =
+	{ REG_KEY_READ, REG_KEY_WRITE, REG_KEY_EXECUTE, REG_KEY_ALL };
+
+/********************************************************************
+********************************************************************/
+
+static SEC_DESC* construct_registry_sd( TALLOC_CTX *ctx )
+{
+	SEC_ACE ace[3];
+	SEC_ACCESS mask;
+	size_t i = 0;
+	SEC_DESC *sd;
+	SEC_ACL *acl;
+	size_t sd_size;
+
+	/* basic access for Everyone */
+
+	init_sec_access(&mask, REG_KEY_READ );
+	init_sec_ace(&ace[i++], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
+
+	/* Full Access 'BUILTIN\Administrators' */
+
+	init_sec_access(&mask, REG_KEY_ALL );
+	init_sec_ace(&ace[i++], &global_sid_Builtin_Administrators, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
+
+	/* Full Access 'NT Authority\System' */
+
+	init_sec_access(&mask, REG_KEY_ALL );
+	init_sec_ace(&ace[i++], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
+
+	/* create the security descriptor */
+
+	if ( !(acl = make_sec_acl(ctx, NT4_ACL_REVISION, i, ace)) )
+		return NULL;
+
+	if ( !(sd = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, NULL, NULL, NULL, acl, &sd_size)) )
+		return NULL;
+
+	return sd;
+}
+
+/***********************************************************************
+ High level wrapper function for storing registry subkeys
+ ***********************************************************************/
+
+bool store_reg_keys( REGISTRY_KEY *key, REGSUBKEY_CTR *subkeys )
+{
+	if ( key->hook && key->hook->ops && key->hook->ops->store_subkeys )
+		return key->hook->ops->store_subkeys( key->name, subkeys );
+
+	return false;
+}
+
+/***********************************************************************
+ High level wrapper function for storing registry values
+ ***********************************************************************/
+
+bool store_reg_values( REGISTRY_KEY *key, REGVAL_CTR *val )
+{
+	if ( key->hook && key->hook->ops && key->hook->ops->store_values )
+		return key->hook->ops->store_values( key->name, val );
+
+	return false;
+}
+
+/***********************************************************************
+ High level wrapper function for enumerating registry subkeys
+ Initialize the TALLOC_CTX if necessary
+ ***********************************************************************/
+
+int fetch_reg_keys( REGISTRY_KEY *key, REGSUBKEY_CTR *subkey_ctr )
+{
+	int result = -1;
+
+	if ( key->hook && key->hook->ops && key->hook->ops->fetch_subkeys )
+		result = key->hook->ops->fetch_subkeys( key->name, subkey_ctr );
+
+	return result;
+}
+
+/***********************************************************************
+ High level wrapper function for enumerating registry values
+ ***********************************************************************/
+
+int fetch_reg_values( REGISTRY_KEY *key, REGVAL_CTR *val )
+{
+	int result = -1;
+
+	DEBUG(10, ("fetch_reg_values called for key '%s' (ops %p)\n", key->name,
+		   (key->hook && key->hook->ops) ? (void *)key->hook->ops : NULL));
+
+	if ( key->hook && key->hook->ops && key->hook->ops->fetch_values )
+		result = key->hook->ops->fetch_values( key->name, val );
+
+	return result;
+}
+
+/***********************************************************************
+ High level access check for passing the required access mask to the
+ underlying registry backend
+ ***********************************************************************/
+
+bool regkey_access_check( REGISTRY_KEY *key, uint32 requested, uint32 *granted,
+			  const struct nt_user_token *token )
+{
+	SEC_DESC *sec_desc;
+	NTSTATUS status;
+	WERROR err;
+	TALLOC_CTX *mem_ctx;
+
+	/* use the default security check if the backend has not defined its
+	 * own */
+
+	if (key->hook && key->hook->ops && key->hook->ops->reg_access_check) {
+		return key->hook->ops->reg_access_check( key->name, requested,
+							 granted, token );
+	}
+
+	/*
+	 * The secdesc routines can't yet cope with a NULL talloc ctx sanely.
+	 */
+
+	if (!(mem_ctx = talloc_init("regkey_access_check"))) {
+		return false;
+	}
+
+	err = regkey_get_secdesc(mem_ctx, key, &sec_desc);
+
+	if (!W_ERROR_IS_OK(err)) {
+		TALLOC_FREE(mem_ctx);
+		return false;
+	}
+
+	se_map_generic( &requested, &reg_generic_map );
+
+	if (!se_access_check(sec_desc, token, requested, granted, &status)) {
+		TALLOC_FREE(mem_ctx);
+		return false;
+	}
+
+	TALLOC_FREE(mem_ctx);
+	return NT_STATUS_IS_OK(status);
+}
+
+WERROR regkey_get_secdesc(TALLOC_CTX *mem_ctx, REGISTRY_KEY *key,
+			  struct security_descriptor **psecdesc)
+{
+	struct security_descriptor *secdesc;
+
+	if (key->hook && key->hook->ops && key->hook->ops->get_secdesc) {
+		WERROR err;
+
+		err = key->hook->ops->get_secdesc(mem_ctx, key->name,
+						  psecdesc);
+		if (W_ERROR_IS_OK(err)) {
+			return WERR_OK;
+		}
+	}
+
+	if (!(secdesc = construct_registry_sd(mem_ctx))) {
+		return WERR_NOMEM;
+	}
+
+	*psecdesc = secdesc;
+	return WERR_OK;
+}
+
+WERROR regkey_set_secdesc(REGISTRY_KEY *key,
+			  struct security_descriptor *psecdesc)
+{
+	if (key->hook && key->hook->ops && key->hook->ops->set_secdesc) {
+		return key->hook->ops->set_secdesc(key->name, psecdesc);
+	}
+
+	return WERR_ACCESS_DENIED;
+}
+
+/**
+ * Check whether the in-memory version of the subkyes of a
+ * registry key needs update from disk.
+ */
+bool reg_subkeys_need_update(REGISTRY_KEY *key, REGSUBKEY_CTR *subkeys)
+{
+	if (key->hook && key->hook->ops && key->hook->ops->subkeys_need_update)
+	{
+		return key->hook->ops->subkeys_need_update(subkeys);
+	}
+
+	return false;
+}
+
+/**
+ * Check whether the in-memory version of the values of a
+ * registry key needs update from disk.
+ */
+bool reg_values_need_update(REGISTRY_KEY *key, REGVAL_CTR *values)
+{
+	if (key->hook && key->hook->ops && key->hook->ops->values_need_update)
+	{
+		return key->hook->ops->values_need_update(values);
+	}
+
+	return false;
+}
+