Move some libgpo files to root.

Signed-off-by: Günther Deschner <gd@samba.org>

5 files changed, 1873 insertions, 0 deletions

diff --git a/libgpo/config.mk b/libgpo/config.mk
new file mode 100644
index 00000000000..ebfcafd0241
--- /dev/null
+++ b/libgpo/config.mk
@@ -0,0 +1,3 @@
+[SUBSYSTEM::LIBGPO]
+
+LIBGPO_OBJ_FILES = ../libgpo/gpo_util.o
diff --git a/libgpo/gpext/gpext.c b/libgpo/gpext/gpext.c
new file mode 100644
index 00000000000..82c0459e453
--- /dev/null
+++ b/libgpo/gpext/gpext.c
@@ -0,0 +1,749 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Support
+ *  Copyright (C) Guenther Deschner 2007-2008
+ *
+ *  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/>.
+ */
+
+#include "includes.h"
+#include "../libgpo/gpext/gpext.h"
+#include "librpc/gen_ndr/ndr_misc.h"
+#include "lib/util/dlinklist.h"
+
+static struct gp_extension *extensions = NULL;
+
+/****************************************************************
+****************************************************************/
+
+struct gp_extension *get_gp_extension_list(void)
+{
+	return extensions;
+}
+
+/****************************************************************
+****************************************************************/
+
+/* see http://support.microsoft.com/kb/216358/en-us/ for more info */
+
+struct gp_extension_reg_table gpext_reg_vals[] = {
+	{ "DllName", REG_EXPAND_SZ },
+	{ "ProcessGroupPolicy", REG_SZ },
+	{ "NoMachinePolicy", REG_DWORD },
+	{ "NoUserPolicy", REG_DWORD },
+	{ "NoSlowLink", REG_DWORD },
+	{ "NoBackgroundPolicy", REG_DWORD },
+	{ "NoGPOListChanges", REG_DWORD },
+	{ "PerUserLocalSettings", REG_DWORD },
+	{ "RequiresSuccessfulRegistry", REG_DWORD },
+	{ "EnableAsynchronousProcessing", REG_DWORD },
+	{ "ExtensionDebugLevel", REG_DWORD },
+	/* new */
+	{ "GenerateGroupPolicy", REG_SZ }, /* not supported on w2k */
+	{ "NotifyLinkTransition", REG_DWORD },
+	{ "ProcessGroupPolicyEx", REG_SZ }, /* not supported on w2k */
+	{ "ExtensionEventSource", REG_MULTI_SZ }, /* not supported on w2k */
+	{ "GenerateGroupPolicy", REG_SZ },
+	{ "MaxNoGPOListChangesInterval", REG_DWORD },
+	{ NULL, REG_NONE }
+};
+
+/****************************************************************
+****************************************************************/
+
+static struct gp_extension *get_extension_by_name(struct gp_extension *be,
+						  const char *name)
+{
+	struct gp_extension *b;
+
+	for (b = be; b; b = b->next) {
+		if (strequal(b->name, name)) {
+			return b;
+		}
+	}
+
+	return NULL;
+}
+
+/****************************************************************
+****************************************************************/
+
+static struct gp_extension_methods *get_methods_by_name(struct gp_extension *be,
+							const char *name)
+{
+	struct gp_extension *b;
+
+	for (b = be; b; b = b->next) {
+		if (strequal(b->name, name)) {
+			return b->methods;
+		}
+	}
+
+	return NULL;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS unregister_gp_extension(const char *name)
+{
+	struct gp_extension *ext;
+
+	ext = get_extension_by_name(extensions, name);
+	if (!ext) {
+		return NT_STATUS_OK;
+	}
+
+	DLIST_REMOVE(extensions, ext);
+	talloc_free(ext);
+
+	DEBUG(2,("Successfully removed GP extension '%s'\n", name));
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS register_gp_extension(TALLOC_CTX *gpext_ctx,
+			       int version,
+			       const char *name,
+			       const char *guid,
+			       struct gp_extension_methods *methods)
+{
+	struct gp_extension_methods *test;
+	struct gp_extension *entry;
+	NTSTATUS status;
+
+	if (!gpext_ctx) {
+		return NT_STATUS_INTERNAL_DB_ERROR;
+	}
+
+	if ((version != SMB_GPEXT_INTERFACE_VERSION)) {
+		DEBUG(0,("Failed to register gp extension.\n"
+		         "The module was compiled against "
+			 "SMB_GPEXT_INTERFACE_VERSION %d,\n"
+		         "current SMB_GPEXT_INTERFACE_VERSION is %d.\n"
+		         "Please recompile against the current "
+			 "version of samba!\n",
+			 version, SMB_GPEXT_INTERFACE_VERSION));
+		return NT_STATUS_OBJECT_TYPE_MISMATCH;
+	}
+
+	if (!guid || !name || !name[0] || !methods) {
+		DEBUG(0,("Called with NULL pointer or empty name!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	test = get_methods_by_name(extensions, name);
+	if (test) {
+		DEBUG(0,("GP extension module %s already registered!\n",
+			name));
+		return NT_STATUS_OBJECT_NAME_COLLISION;
+	}
+
+	entry = talloc_zero(gpext_ctx, struct gp_extension);
+	NT_STATUS_HAVE_NO_MEMORY(entry);
+
+	entry->name = talloc_strdup(gpext_ctx, name);
+	NT_STATUS_HAVE_NO_MEMORY(entry->name);
+
+	entry->guid = talloc_zero(gpext_ctx, struct GUID);
+	NT_STATUS_HAVE_NO_MEMORY(entry->guid);
+	status = GUID_from_string(guid, entry->guid);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	entry->methods = methods;
+	DLIST_ADD(extensions, entry);
+
+	DEBUG(2,("Successfully added GP extension '%s' %s\n",
+		name, GUID_string2(gpext_ctx, entry->guid)));
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS gp_extension_init_module(TALLOC_CTX *mem_ctx,
+					 const char *name,
+					 struct gp_extension **gpext)
+{
+	NTSTATUS status;
+	struct gp_extension *ext = NULL;
+
+	ext = talloc_zero(mem_ctx, struct gp_extension);
+	NT_STATUS_HAVE_NO_MEMORY(gpext);
+
+	ext->methods = get_methods_by_name(extensions, name);
+	if (!ext->methods) {
+
+		status = smb_probe_module(SAMBA_SUBSYSTEM_GPEXT,
+					  name);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+
+		ext->methods = get_methods_by_name(extensions, name);
+		if (!ext->methods) {
+			return NT_STATUS_DLL_INIT_FAILED;
+		}
+	}
+
+	*gpext = ext;
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static bool add_gp_extension_reg_entry_to_array(TALLOC_CTX *mem_ctx,
+						struct gp_extension_reg_entry *entry,
+						struct gp_extension_reg_entry **entries,
+						size_t *num)
+{
+	*entries = talloc_realloc(mem_ctx, *entries,
+					struct gp_extension_reg_entry,
+					(*num)+1);
+	if (*entries == NULL) {
+		*num = 0;
+		return false;
+	}
+
+	(*entries)[*num].value = entry->value;
+	(*entries)[*num].data = entry->data;
+
+	*num += 1;
+	return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+static bool add_gp_extension_reg_info_entry_to_array(TALLOC_CTX *mem_ctx,
+						     struct gp_extension_reg_info_entry *entry,
+						     struct gp_extension_reg_info_entry **entries,
+						     size_t *num)
+{
+	*entries = talloc_realloc(mem_ctx, *entries,
+					struct gp_extension_reg_info_entry,
+					(*num)+1);
+	if (*entries == NULL) {
+		*num = 0;
+		return false;
+	}
+
+	(*entries)[*num].guid = entry->guid;
+	(*entries)[*num].num_entries = entry->num_entries;
+	(*entries)[*num].entries = entry->entries;
+
+	*num += 1;
+	return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS gp_ext_info_add_reg(TALLOC_CTX *mem_ctx,
+				    struct gp_extension_reg_info_entry *entry,
+				    const char *value,
+				    enum winreg_Type type,
+				    const char *data_s)
+{
+	struct gp_extension_reg_entry *reg_entry = NULL;
+	struct registry_value *data = NULL;
+
+	reg_entry = talloc_zero(mem_ctx, struct gp_extension_reg_entry);
+	NT_STATUS_HAVE_NO_MEMORY(reg_entry);
+
+	data = talloc_zero(mem_ctx, struct registry_value);
+	NT_STATUS_HAVE_NO_MEMORY(data);
+
+	data->type = type;
+
+	switch (type) {
+		case REG_SZ:
+		case REG_EXPAND_SZ:
+			data->v.sz.str = talloc_strdup(mem_ctx, data_s);
+			NT_STATUS_HAVE_NO_MEMORY(data->v.sz.str);
+			data->v.sz.len = strlen(data_s);
+			break;
+		case REG_DWORD:
+			data->v.dword = atoi(data_s);
+			break;
+		default:
+			return NT_STATUS_NOT_SUPPORTED;
+	}
+
+	reg_entry->value = value;
+	reg_entry->data = data;
+
+	if (!add_gp_extension_reg_entry_to_array(mem_ctx, reg_entry,
+						 &entry->entries,
+						 &entry->num_entries)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS gp_ext_info_add_reg_table(TALLOC_CTX *mem_ctx,
+					  const char *module,
+					  struct gp_extension_reg_info_entry *entry,
+					  struct gp_extension_reg_table *table)
+{
+	NTSTATUS status;
+	const char *module_name = NULL;
+	int i;
+
+	module_name = talloc_asprintf(mem_ctx, "%s.%s", module, shlib_ext());
+	NT_STATUS_HAVE_NO_MEMORY(module_name);
+
+	status = gp_ext_info_add_reg(mem_ctx, entry,
+				     "DllName", REG_EXPAND_SZ, module_name);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	for (i=0; table[i].val; i++) {
+		status = gp_ext_info_add_reg(mem_ctx, entry,
+					     table[i].val,
+					     table[i].type,
+					     table[i].data);
+		NT_STATUS_NOT_OK_RETURN(status);
+	}
+
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS gp_ext_info_add_entry(TALLOC_CTX *mem_ctx,
+			       const char *module,
+			       const char *ext_guid,
+			       struct gp_extension_reg_table *table,
+			       struct gp_extension_reg_info *info)
+{
+	NTSTATUS status;
+	struct gp_extension_reg_info_entry *entry = NULL;
+
+	entry = TALLOC_ZERO_P(mem_ctx, struct gp_extension_reg_info_entry);
+	NT_STATUS_HAVE_NO_MEMORY(entry);
+
+	status = GUID_from_string(ext_guid, &entry->guid);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	status = gp_ext_info_add_reg_table(mem_ctx, module, entry, table);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	if (!add_gp_extension_reg_info_entry_to_array(mem_ctx, entry,
+						      &info->entries,
+						      &info->num_entries)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static bool gp_extension_reg_info_verify_entry(struct gp_extension_reg_entry *entry)
+{
+	int i;
+
+	for (i=0; gpext_reg_vals[i].val; i++) {
+
+		if ((strequal(entry->value, gpext_reg_vals[i].val)) &&
+		    (entry->data->type == gpext_reg_vals[i].type)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/****************************************************************
+****************************************************************/
+
+static bool gp_extension_reg_info_verify(struct gp_extension_reg_info_entry *entry)
+{
+	int i;
+
+	for (i=0; i < entry->num_entries; i++) {
+		if (!gp_extension_reg_info_verify_entry(&entry->entries[i])) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+static WERROR gp_extension_store_reg_vals(TALLOC_CTX *mem_ctx,
+					  struct registry_key *key,
+					  struct gp_extension_reg_info_entry *entry)
+{
+	WERROR werr = WERR_OK;
+	size_t i;
+
+	for (i=0; i < entry->num_entries; i++) {
+
+		werr = reg_setvalue(key,
+				    entry->entries[i].value,
+				    entry->entries[i].data);
+		W_ERROR_NOT_OK_RETURN(werr);
+	}
+
+	return werr;
+}
+
+/****************************************************************
+****************************************************************/
+
+static WERROR gp_extension_store_reg_entry(TALLOC_CTX *mem_ctx,
+					   struct gp_registry_context *reg_ctx,
+					   struct gp_extension_reg_info_entry *entry)
+{
+	WERROR werr;
+	struct registry_key *key = NULL;
+	const char *subkeyname = NULL;
+
+	if (!gp_extension_reg_info_verify(entry)) {
+		return WERR_INVALID_PARAM;
+	}
+
+	subkeyname = GUID_string2(mem_ctx, &entry->guid);
+	W_ERROR_HAVE_NO_MEMORY(subkeyname);
+
+	strupper_m(CONST_DISCARD(char *,subkeyname));
+
+	werr = gp_store_reg_subkey(mem_ctx,
+				   subkeyname,
+				   reg_ctx->curr_key,
+				   &key);
+	W_ERROR_NOT_OK_RETURN(werr);
+
+	werr = gp_extension_store_reg_vals(mem_ctx,
+					   key,
+					   entry);
+	W_ERROR_NOT_OK_RETURN(werr);
+
+	return werr;
+}
+
+/****************************************************************
+****************************************************************/
+
+static WERROR gp_extension_store_reg(TALLOC_CTX *mem_ctx,
+				     struct gp_registry_context *reg_ctx,
+				     struct gp_extension_reg_info *info)
+{
+	WERROR werr = WERR_OK;
+	int i;
+
+	if (!info) {
+		return WERR_OK;
+	}
+
+	for (i=0; i < info->num_entries; i++) {
+		werr = gp_extension_store_reg_entry(mem_ctx,
+						    reg_ctx,
+						    &info->entries[i]);
+		W_ERROR_NOT_OK_RETURN(werr);
+	}
+
+	return werr;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS gp_glob_ext_list(TALLOC_CTX *mem_ctx,
+				 const char ***ext_list,
+				 size_t *ext_list_len)
+{
+	SMB_STRUCT_DIR *dir = NULL;
+	SMB_STRUCT_DIRENT *dirent = NULL;
+
+	dir = sys_opendir(modules_path(SAMBA_SUBSYSTEM_GPEXT));
+	if (!dir) {
+		return map_nt_error_from_unix(errno);
+	}
+
+	while ((dirent = sys_readdir(dir))) {
+
+		fstring name; /* forgive me... */
+		char *p;
+
+		if ((strequal(dirent->d_name, ".")) ||
+		    (strequal(dirent->d_name, ".."))) {
+			continue;
+		}
+
+		p = strrchr(dirent->d_name, '.');
+		if (!p) {
+			sys_closedir(dir);
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		if (!strcsequal(p+1, shlib_ext())) {
+			DEBUG(10,("gp_glob_ext_list: not a *.so file: %s\n",
+				dirent->d_name));
+			continue;
+		}
+
+		fstrcpy(name, dirent->d_name);
+		name[PTR_DIFF(p, dirent->d_name)] = 0;
+
+		if (!add_string_to_array(mem_ctx, name, ext_list,
+					 (int *)ext_list_len)) {
+			sys_closedir(dir);
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	sys_closedir(dir);
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS shutdown_gp_extensions(void)
+{
+	struct gp_extension *ext = NULL;
+
+	for (ext = extensions; ext; ext = ext->next) {
+		if (ext->methods && ext->methods->shutdown) {
+			ext->methods->shutdown();
+		}
+	}
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS init_gp_extensions(TALLOC_CTX *mem_ctx)
+{
+	NTSTATUS status;
+	WERROR werr;
+	int i = 0;
+	const char **ext_array = NULL;
+	size_t ext_array_len = 0;
+	struct gp_extension *gpext = NULL;
+	struct gp_registry_context *reg_ctx = NULL;
+
+	if (get_gp_extension_list()) {
+		return NT_STATUS_OK;
+	}
+
+	status = gp_glob_ext_list(mem_ctx, &ext_array, &ext_array_len);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	for (i=0; i<ext_array_len; i++) {
+
+		struct gp_extension_reg_info *info = NULL;
+
+		status = gp_extension_init_module(mem_ctx, ext_array[i],
+						  &gpext);
+		if (!NT_STATUS_IS_OK(status)) {
+			goto out;
+		}
+
+		if (gpext->methods->get_reg_config) {
+
+			status = gpext->methods->initialize(mem_ctx);
+			if (!NT_STATUS_IS_OK(status)) {
+				gpext->methods->shutdown();
+				goto out;
+			}
+
+			status = gpext->methods->get_reg_config(mem_ctx,
+								&info);
+			if (!NT_STATUS_IS_OK(status)) {
+				gpext->methods->shutdown();
+				goto out;
+			}
+
+			if (!reg_ctx) {
+				struct nt_user_token *token;
+
+				token = registry_create_system_token(mem_ctx);
+				NT_STATUS_HAVE_NO_MEMORY(token);
+
+				werr = gp_init_reg_ctx(mem_ctx,
+						       KEY_WINLOGON_GPEXT_PATH,
+						       REG_KEY_WRITE,
+						       token,
+						       &reg_ctx);
+				if (!W_ERROR_IS_OK(werr)) {
+					status = werror_to_ntstatus(werr);
+					gpext->methods->shutdown();
+					goto out;
+				}
+			}
+
+			werr = gp_extension_store_reg(mem_ctx, reg_ctx, info);
+			if (!W_ERROR_IS_OK(werr)) {
+				DEBUG(1,("gp_extension_store_reg failed: %s\n",
+					win_errstr(werr)));
+				TALLOC_FREE(info);
+				gpext->methods->shutdown();
+				status = werror_to_ntstatus(werr);
+				goto out;
+			}
+			TALLOC_FREE(info);
+		}
+
+	}
+
+ out:
+	TALLOC_FREE(reg_ctx);
+
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS free_gp_extensions(void)
+{
+	struct gp_extension *ext, *ext_next = NULL;
+
+	for (ext = extensions; ext; ext = ext_next) {
+		ext_next = ext->next;
+		DLIST_REMOVE(extensions, ext);
+		TALLOC_FREE(ext);
+	}
+
+	extensions = NULL;
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+void debug_gpext_header(int lvl,
+			const char *name,
+			uint32_t flags,
+			struct GROUP_POLICY_OBJECT *gpo,
+			const char *extension_guid,
+			const char *snapin_guid)
+{
+	char *flags_str = NULL;
+
+	DEBUG(lvl,("%s\n", name));
+	DEBUGADD(lvl,("\tgpo:           %s (%s)\n", gpo->name,
+		gpo->display_name));
+	DEBUGADD(lvl,("\tcse extension: %s (%s)\n", extension_guid,
+		cse_gpo_guid_string_to_name(extension_guid)));
+	DEBUGADD(lvl,("\tgplink:        %s\n", gpo->link));
+	DEBUGADD(lvl,("\tsnapin:        %s (%s)\n", snapin_guid,
+		cse_snapin_gpo_guid_string_to_name(snapin_guid)));
+
+	flags_str = gpo_flag_str(flags);
+	DEBUGADD(lvl,("\tflags:         0x%08x %s\n", flags, flags_str));
+	SAFE_FREE(flags_str);
+}
+
+NTSTATUS process_gpo_list_with_extension(ADS_STRUCT *ads,
+			   TALLOC_CTX *mem_ctx,
+			   uint32_t flags,
+			   const struct nt_user_token *token,
+			   struct GROUP_POLICY_OBJECT *gpo_list,
+			   const char *extension_guid,
+			   const char *snapin_guid)
+{
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS gpext_process_extension(ADS_STRUCT *ads,
+				 TALLOC_CTX *mem_ctx,
+				 uint32_t flags,
+				 const struct nt_user_token *token,
+				 struct registry_key *root_key,
+				 struct GROUP_POLICY_OBJECT *gpo,
+				 const char *extension_guid,
+				 const char *snapin_guid)
+{
+	NTSTATUS status;
+	struct gp_extension *ext = NULL;
+	struct GUID guid;
+	bool cse_found = false;
+
+	status = init_gp_extensions(mem_ctx);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1,("init_gp_extensions failed: %s\n",
+			nt_errstr(status)));
+		return status;
+	}
+
+	status = GUID_from_string(extension_guid, &guid);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	for (ext = extensions; ext; ext = ext->next) {
+
+		if (GUID_equal(ext->guid, &guid)) {
+			cse_found = true;
+			break;
+		}
+	}
+
+	if (!cse_found) {
+		goto no_ext;
+	}
+
+	status = ext->methods->initialize(mem_ctx);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	status = ext->methods->process_group_policy(ads,
+						    mem_ctx,
+						    flags,
+						    root_key,
+						    token,
+						    gpo,
+						    extension_guid,
+						    snapin_guid);
+	if (!NT_STATUS_IS_OK(status)) {
+		ext->methods->shutdown();
+	}
+
+	return status;
+
+ no_ext:
+	if (flags & GPO_INFO_FLAG_VERBOSE) {
+		DEBUG(0,("process_extension: no extension available for:\n"));
+		DEBUGADD(0,("%s (%s) (snapin: %s)\n",
+			extension_guid,
+			cse_gpo_guid_string_to_name(extension_guid),
+			snapin_guid));
+	}
+
+	return NT_STATUS_OK;
+}
diff --git a/libgpo/gpext/gpext.h b/libgpo/gpext/gpext.h
new file mode 100644
index 00000000000..a3f9368f694
--- /dev/null
+++ b/libgpo/gpext/gpext.h
@@ -0,0 +1,86 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Support
+ *  Copyright (C) Guenther Deschner 2007-2008
+ *
+ *  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/>.
+ */
+
+#ifndef __GPEXT_H__
+#define __GPEXT_H__
+
+#include "librpc/gen_ndr/winreg.h"
+
+#define KEY_WINLOGON_GPEXT_PATH "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions"
+
+#define SAMBA_SUBSYSTEM_GPEXT "gpext"
+
+#define SMB_GPEXT_INTERFACE_VERSION 1
+
+struct gp_extension {
+	struct GUID *guid;
+	const char *name;
+	struct gp_extension_methods *methods;
+	struct gp_extension *prev, *next;
+};
+
+struct gp_extension_reg_table {
+	const char *val;
+	enum winreg_Type type;
+	const char *data;
+};
+
+struct gp_extension_reg_entry {
+	const char *value;
+	struct registry_value *data;
+};
+
+struct gp_extension_reg_info_entry {
+	struct GUID guid;
+	size_t num_entries;
+	struct gp_extension_reg_entry *entries;
+};
+
+struct gp_extension_reg_info {
+	size_t num_entries;
+	struct gp_extension_reg_info_entry *entries;
+};
+
+struct gp_extension_methods {
+
+	NTSTATUS (*initialize)(TALLOC_CTX *mem_ctx);
+
+	NTSTATUS (*process_group_policy)(ADS_STRUCT *ads,
+					 TALLOC_CTX *mem_ctx,
+					 uint32_t flags,
+					 struct registry_key *root_key,
+					 const struct nt_user_token *token,
+					 struct GROUP_POLICY_OBJECT *gpo,
+					 const char *extension_guid,
+					 const char *snapin_guid);
+
+	NTSTATUS (*process_group_policy2)(ADS_STRUCT *ads,
+					 TALLOC_CTX *mem_ctx,
+					 uint32_t flags,
+					 const struct nt_user_token *token,
+					 struct GROUP_POLICY_OBJECT *gpo_list,
+					 const char *extension_guid);
+
+	NTSTATUS (*get_reg_config)(TALLOC_CTX *mem_ctx,
+				   struct gp_extension_reg_info **info);
+
+	NTSTATUS (*shutdown)(void);
+};
+
+#endif /* __GPEXT_H__ */
diff --git a/libgpo/gpo.h b/libgpo/gpo.h
new file mode 100644
index 00000000000..9abf526e14d
--- /dev/null
+++ b/libgpo/gpo.h
@@ -0,0 +1,163 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Object Support
+ *  Copyright (C) Guenther Deschner 2005-2008
+ *
+ *  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/>.
+ */
+
+#ifndef __GPO_H__
+#define __GPO_H__
+
+enum GPO_LINK_TYPE {
+	GP_LINK_UNKOWN	= 0,
+	GP_LINK_MACHINE	= 1,
+	GP_LINK_SITE	= 2,
+	GP_LINK_DOMAIN	= 3,
+	GP_LINK_OU	= 4,
+	GP_LINK_LOCAL	= 5 /* for convenience */
+};
+
+/* GPO_OPTIONS */
+#define GPO_FLAG_DISABLE	0x00000001
+#define GPO_FLAG_FORCE		0x00000002
+
+/* GPO_LIST_FLAGS */
+#define GPO_LIST_FLAG_MACHINE	0x00000001
+#define GPO_LIST_FLAG_SITEONLY	0x00000002
+
+/* following flags from http://support.microsoft.com/kb/312164/EN-US/ */
+#define GPO_INFO_FLAG_MACHINE			0x00000001
+#define GPO_INFO_FLAG_BACKGROUND	 	0x00000010
+#define GPO_INFO_FLAG_SLOWLINK			0x00000020
+#define GPO_INFO_FLAG_VERBOSE			0x00000040
+#define GPO_INFO_FLAG_NOCHANGES			0x00000080
+#define GPO_INFO_FLAG_LINKTRANSITION		0x00000100
+#define GPO_INFO_FLAG_LOGRSOP_TRANSITION	0x00000200
+#define GPO_INFO_FLAG_FORCED_REFRESH		0x00000400
+#define GPO_INFO_FLAG_SAFEMODE_BOOT		0x00000800
+
+#define GPO_VERSION_USER(x) (x >> 16)
+#define GPO_VERSION_MACHINE(x) (x & 0xffff)
+
+struct GROUP_POLICY_OBJECT {
+	uint32_t options;	/* GPFLAGS_* */
+	uint32_t version;
+	const char *ds_path;
+	const char *file_sys_path;
+	const char *display_name;
+	const char *name;
+	const char *link;
+	enum GPO_LINK_TYPE link_type;
+	const char *user_extensions;
+	const char *machine_extensions;
+	struct security_descriptor *security_descriptor;
+	struct GROUP_POLICY_OBJECT *next, *prev;
+};
+
+/* the following is seen on the DS (see adssearch.pl for details) */
+
+/* the type field in a 'gPLink', the same as GPO_FLAG ? */
+#define GPO_LINK_OPT_NONE	0x00000000
+#define GPO_LINK_OPT_DISABLED	0x00000001
+#define GPO_LINK_OPT_ENFORCED	0x00000002
+
+/* GPO_LINK_OPT_ENFORCED takes precedence over GPOPTIONS_BLOCK_INHERITANCE */
+
+/* 'gPOptions', maybe a bitmask as well */
+enum GPO_INHERIT {
+	GPOPTIONS_INHERIT		= 0,
+	GPOPTIONS_BLOCK_INHERITANCE	= 1
+};
+
+/* 'flags' in a 'groupPolicyContainer' object */
+#define GPFLAGS_ALL_ENABLED			0x00000000
+#define GPFLAGS_USER_SETTINGS_DISABLED		0x00000001
+#define GPFLAGS_MACHINE_SETTINGS_DISABLED	0x00000002
+#define GPFLAGS_ALL_DISABLED (GPFLAGS_USER_SETTINGS_DISABLED | \
+			      GPFLAGS_MACHINE_SETTINGS_DISABLED)
+
+struct GP_LINK {
+	const char *gp_link;	/* raw link name */
+	uint32_t gp_opts;		/* inheritance options GPO_INHERIT */
+	uint32_t num_links;	/* number of links */
+	char **link_names;	/* array of parsed link names */
+	uint32_t *link_opts;	/* array of parsed link opts GPO_LINK_OPT_* */
+};
+
+struct GP_EXT {
+	const char *gp_extension;	/* raw extension name */
+	uint32_t num_exts;
+	char **extensions;
+	char **extensions_guid;
+	char **snapins;
+	char **snapins_guid;
+	struct GP_EXT *next, *prev;
+};
+
+#define GPO_CACHE_DIR "gpo_cache"
+#define GPT_INI "GPT.INI"
+#define GPO_REFRESH_INTERVAL 60*90
+
+#define GPO_REG_STATE_MACHINE "State\\Machine"
+
+enum gp_reg_action {
+	GP_REG_ACTION_NONE = 0,
+	GP_REG_ACTION_ADD_VALUE = 1,
+	GP_REG_ACTION_ADD_KEY = 2,
+	GP_REG_ACTION_DEL_VALUES = 3,
+	GP_REG_ACTION_DEL_VALUE = 4,
+	GP_REG_ACTION_DEL_ALL_VALUES = 5,
+	GP_REG_ACTION_DEL_KEYS = 6,
+	GP_REG_ACTION_SEC_KEY_SET = 7,
+	GP_REG_ACTION_SEC_KEY_RESET = 8
+};
+
+struct gp_registry_entry {
+	enum gp_reg_action action;
+	const char *key;
+	const char *value;
+	struct registry_value *data;
+};
+
+struct gp_registry_value {
+	const char *value;
+	struct registry_value *data;
+};
+
+struct gp_registry_entry2 {
+	enum gp_reg_action action;
+	const char *key;
+	size_t num_values;
+	struct gp_registry_value **values;
+};
+
+struct gp_registry_entries {
+	size_t num_entries;
+	struct gp_registry_entry **entries;
+};
+
+struct gp_registry_context {
+	const struct nt_user_token *token;
+	const char *path;
+	struct registry_key *curr_key;
+};
+
+#define GP_EXT_GUID_SECURITY "827D319E-6EAC-11D2-A4EA-00C04F79F83A"
+#define GP_EXT_GUID_REGISTRY "35378EAC-683F-11D2-A89A-00C04FBBCFA2"
+#define GP_EXT_GUID_SCRIPTS  "42B5FAAE-6536-11D2-AE5A-0000F87571E3"
+
+#include "../libgpo/gpext/gpext.h"
+
+#endif
diff --git a/libgpo/gpo_util.c b/libgpo/gpo_util.c
new file mode 100644
index 00000000000..505400be8c9
--- /dev/null
+++ b/libgpo/gpo_util.c
@@ -0,0 +1,872 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Object Support
+ *  Copyright (C) Guenther Deschner 2005-2008
+ *
+ *  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/>.
+ */
+
+#include "includes.h"
+#include "../libgpo/gpo.h"
+#undef strdup
+
+#define DEFAULT_DOMAIN_POLICY "Default Domain Policy"
+#define DEFAULT_DOMAIN_CONTROLLERS_POLICY "Default Domain Controllers Policy"
+
+/* should we store a parsed guid ? */
+struct gp_table {
+	const char *name;
+	const char *guid_string;
+};
+
+#if 0 /* unused */
+static struct gp_table gpo_default_policy[] = {
+	{ DEFAULT_DOMAIN_POLICY,
+		"31B2F340-016D-11D2-945F-00C04FB984F9" },
+	{ DEFAULT_DOMAIN_CONTROLLERS_POLICY,
+		"6AC1786C-016F-11D2-945F-00C04fB984F9" },
+	{ NULL, NULL }
+};
+#endif
+
+/* the following is seen in gPCMachineExtensionNames / gPCUserExtensionNames */
+
+static struct gp_table gpo_cse_extensions[] = {
+	/* used to be "Administrative Templates Extension" */
+	/* "Registry Settings"
+	(http://support.microsoft.com/kb/216357/EN-US/) */
+	{ "Registry Settings",
+		GP_EXT_GUID_REGISTRY },
+	{ "Microsoft Disc Quota",
+		"3610EDA5-77EF-11D2-8DC5-00C04FA31A66" },
+	{ "EFS recovery",
+		"B1BE8D72-6EAC-11D2-A4EA-00C04F79F83A" },
+	{ "Folder Redirection",
+		"25537BA6-77A8-11D2-9B6C-0000F8080861" },
+	{ "IP Security",
+		"E437BC1C-AA7D-11D2-A382-00C04F991E27" },
+	{ "Internet Explorer Branding",
+		"A2E30F80-D7DE-11d2-BBDE-00C04F86AE3B" },
+	{ "QoS Packet Scheduler",
+		"426031c0-0b47-4852-b0ca-ac3d37bfcb39" },
+	{ "Scripts",
+		GP_EXT_GUID_SCRIPTS },
+	{ "Security",
+		GP_EXT_GUID_SECURITY },
+	{ "Software Installation",
+		"C6DC5466-785A-11D2-84D0-00C04FB169F7" },
+	{ "Wireless Group Policy",
+		"0ACDD40C-75AC-BAA0-BF6DE7E7FE63" },
+	{ "Application Management",
+		"C6DC5466-785A-11D2-84D0-00C04FB169F7" },
+	{ "unknown",
+		"3060E8D0-7020-11D2-842D-00C04FA372D4" },
+	{ NULL, NULL }
+};
+
+/* guess work */
+static struct gp_table gpo_cse_snapin_extensions[] = {
+	{ "Administrative Templates",
+		"0F6B957D-509E-11D1-A7CC-0000F87571E3" },
+	{ "Certificates",
+		"53D6AB1D-2488-11D1-A28C-00C04FB94F17" },
+	{ "EFS recovery policy processing",
+		"B1BE8D72-6EAC-11D2-A4EA-00C04F79F83A" },
+	{ "Folder Redirection policy processing",
+		"25537BA6-77A8-11D2-9B6C-0000F8080861" },
+	{ "Folder Redirection",
+		"88E729D6-BDC1-11D1-BD2A-00C04FB9603F" },
+	{ "Registry policy processing",
+		"35378EAC-683F-11D2-A89A-00C04FBBCFA2" },
+	{ "Remote Installation Services",
+		"3060E8CE-7020-11D2-842D-00C04FA372D4" },
+	{ "Security Settings",
+		"803E14A0-B4FB-11D0-A0D0-00A0C90F574B" },
+	{ "Security policy processing",
+		"827D319E-6EAC-11D2-A4EA-00C04F79F83A" },
+	{ "unknown",
+		"3060E8D0-7020-11D2-842D-00C04FA372D4" },
+	{ "unknown2",
+		"53D6AB1B-2488-11D1-A28C-00C04FB94F17" },
+	{ NULL, NULL }
+};
+
+/****************************************************************
+****************************************************************/
+
+static const char *name_to_guid_string(const char *name,
+				       struct gp_table *table)
+{
+	int i;
+
+	for (i = 0; table[i].name; i++) {
+		if (strequal(name, table[i].name)) {
+			return table[i].guid_string;
+		}
+	}
+
+	return NULL;
+}
+
+/****************************************************************
+****************************************************************/
+
+static const char *guid_string_to_name(const char *guid_string,
+				       struct gp_table *table)
+{
+	int i;
+
+	for (i = 0; table[i].guid_string; i++) {
+		if (strequal(guid_string, table[i].guid_string)) {
+			return table[i].name;
+		}
+	}
+
+	return NULL;
+}
+
+/****************************************************************
+****************************************************************/
+
+static const char *snapin_guid_string_to_name(const char *guid_string,
+					      struct gp_table *table)
+{
+	int i;
+	for (i = 0; table[i].guid_string; i++) {
+		if (strequal(guid_string, table[i].guid_string)) {
+			return table[i].name;
+		}
+	}
+	return NULL;
+}
+
+#if 0 /* unused */
+static const char *default_gpo_name_to_guid_string(const char *name)
+{
+	return name_to_guid_string(name, gpo_default_policy);
+}
+
+static const char *default_gpo_guid_string_to_name(const char *guid)
+{
+	return guid_string_to_name(guid, gpo_default_policy);
+}
+#endif
+
+/****************************************************************
+****************************************************************/
+
+const char *cse_gpo_guid_string_to_name(const char *guid)
+{
+	return guid_string_to_name(guid, gpo_cse_extensions);
+}
+
+/****************************************************************
+****************************************************************/
+
+const char *cse_gpo_name_to_guid_string(const char *name)
+{
+	return name_to_guid_string(name, gpo_cse_extensions);
+}
+
+/****************************************************************
+****************************************************************/
+
+const char *cse_snapin_gpo_guid_string_to_name(const char *guid)
+{
+	return snapin_guid_string_to_name(guid, gpo_cse_snapin_extensions);
+}
+
+/****************************************************************
+****************************************************************/
+
+void dump_gp_ext(struct GP_EXT *gp_ext, int debuglevel)
+{
+	int lvl = debuglevel;
+	int i;
+
+	if (gp_ext == NULL) {
+		return;
+	}
+
+	DEBUG(lvl,("\t---------------------\n\n"));
+	DEBUGADD(lvl,("\tname:\t\t\t%s\n", gp_ext->gp_extension));
+
+	for (i=0; i< gp_ext->num_exts; i++) {
+
+		DEBUGADD(lvl,("\textension:\t\t\t%s\n",
+			gp_ext->extensions_guid[i]));
+		DEBUGADD(lvl,("\textension (name):\t\t\t%s\n",
+			gp_ext->extensions[i]));
+
+		DEBUGADD(lvl,("\tsnapin:\t\t\t%s\n",
+			gp_ext->snapins_guid[i]));
+		DEBUGADD(lvl,("\tsnapin (name):\t\t\t%s\n",
+			gp_ext->snapins[i]));
+	}
+}
+
+#ifdef HAVE_LDAP
+
+/****************************************************************
+****************************************************************/
+
+void dump_gpo(ADS_STRUCT *ads,
+	      TALLOC_CTX *mem_ctx,
+	      struct GROUP_POLICY_OBJECT *gpo,
+	      int debuglevel)
+{
+	int lvl = debuglevel;
+
+	if (gpo == NULL) {
+		return;
+	}
+
+	DEBUG(lvl,("---------------------\n\n"));
+
+	DEBUGADD(lvl,("name:\t\t\t%s\n", gpo->name));
+	DEBUGADD(lvl,("displayname:\t\t%s\n", gpo->display_name));
+	DEBUGADD(lvl,("version:\t\t%d (0x%08x)\n", gpo->version, gpo->version));
+	DEBUGADD(lvl,("version_user:\t\t%d (0x%04x)\n",
+		GPO_VERSION_USER(gpo->version),
+		GPO_VERSION_USER(gpo->version)));
+	DEBUGADD(lvl,("version_machine:\t%d (0x%04x)\n",
+		GPO_VERSION_MACHINE(gpo->version),
+		 GPO_VERSION_MACHINE(gpo->version)));
+	DEBUGADD(lvl,("filesyspath:\t\t%s\n", gpo->file_sys_path));
+	DEBUGADD(lvl,("dspath:\t\t%s\n", gpo->ds_path));
+
+	DEBUGADD(lvl,("options:\t\t%d ", gpo->options));
+	switch (gpo->options) {
+		case GPFLAGS_ALL_ENABLED:
+			DEBUGADD(lvl,("GPFLAGS_ALL_ENABLED\n"));
+			break;
+		case GPFLAGS_USER_SETTINGS_DISABLED:
+			DEBUGADD(lvl,("GPFLAGS_USER_SETTINGS_DISABLED\n"));
+			break;
+		case GPFLAGS_MACHINE_SETTINGS_DISABLED:
+			DEBUGADD(lvl,("GPFLAGS_MACHINE_SETTINGS_DISABLED\n"));
+			break;
+		case GPFLAGS_ALL_DISABLED:
+			DEBUGADD(lvl,("GPFLAGS_ALL_DISABLED\n"));
+			break;
+		default:
+			DEBUGADD(lvl,("unknown option: %d\n", gpo->options));
+			break;
+	}
+
+	DEBUGADD(lvl,("link:\t\t\t%s\n", gpo->link));
+	DEBUGADD(lvl,("link_type:\t\t%d ", gpo->link_type));
+	switch (gpo->link_type) {
+		case GP_LINK_UNKOWN:
+			DEBUGADD(lvl,("GP_LINK_UNKOWN\n"));
+			break;
+		case GP_LINK_OU:
+			DEBUGADD(lvl,("GP_LINK_OU\n"));
+			break;
+		case GP_LINK_DOMAIN:
+			DEBUGADD(lvl,("GP_LINK_DOMAIN\n"));
+			break;
+		case GP_LINK_SITE:
+			DEBUGADD(lvl,("GP_LINK_SITE\n"));
+			break;
+		case GP_LINK_MACHINE:
+			DEBUGADD(lvl,("GP_LINK_MACHINE\n"));
+			break;
+		default:
+			break;
+	}
+
+	DEBUGADD(lvl,("machine_extensions:\t%s\n", gpo->machine_extensions));
+
+	if (gpo->machine_extensions) {
+
+		struct GP_EXT *gp_ext = NULL;
+
+		if (!ads_parse_gp_ext(mem_ctx, gpo->machine_extensions,
+				      &gp_ext)) {
+			return;
+		}
+		dump_gp_ext(gp_ext, lvl);
+	}
+
+	DEBUGADD(lvl,("user_extensions:\t%s\n", gpo->user_extensions));
+
+	if (gpo->user_extensions) {
+
+		struct GP_EXT *gp_ext = NULL;
+
+		if (!ads_parse_gp_ext(mem_ctx, gpo->user_extensions,
+				      &gp_ext)) {
+			return;
+		}
+		dump_gp_ext(gp_ext, lvl);
+	}
+
+	DEBUGADD(lvl,("security descriptor:\n"));
+
+	ads_disp_sd(ads, mem_ctx, gpo->security_descriptor);
+}
+
+/****************************************************************
+****************************************************************/
+
+void dump_gpo_list(ADS_STRUCT *ads,
+		   TALLOC_CTX *mem_ctx,
+		   struct GROUP_POLICY_OBJECT *gpo_list,
+		   int debuglevel)
+{
+	struct GROUP_POLICY_OBJECT *gpo = NULL;
+
+	for (gpo = gpo_list; gpo; gpo = gpo->next) {
+		dump_gpo(ads, mem_ctx, gpo, debuglevel);
+	}
+}
+
+/****************************************************************
+****************************************************************/
+
+void dump_gplink(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx, struct GP_LINK *gp_link)
+{
+	ADS_STATUS status;
+	int i;
+	int lvl = 10;
+
+	if (gp_link == NULL) {
+		return;
+	}
+
+	DEBUG(lvl,("---------------------\n\n"));
+
+	DEBUGADD(lvl,("gplink: %s\n", gp_link->gp_link));
+	DEBUGADD(lvl,("gpopts: %d ", gp_link->gp_opts));
+	switch (gp_link->gp_opts) {
+		case GPOPTIONS_INHERIT:
+			DEBUGADD(lvl,("GPOPTIONS_INHERIT\n"));
+			break;
+		case GPOPTIONS_BLOCK_INHERITANCE:
+			DEBUGADD(lvl,("GPOPTIONS_BLOCK_INHERITANCE\n"));
+			break;
+		default:
+			break;
+	}
+
+	DEBUGADD(lvl,("num links: %d\n", gp_link->num_links));
+
+	for (i = 0; i < gp_link->num_links; i++) {
+
+		DEBUGADD(lvl,("---------------------\n\n"));
+
+		DEBUGADD(lvl,("link: #%d\n", i + 1));
+		DEBUGADD(lvl,("name: %s\n", gp_link->link_names[i]));
+
+		DEBUGADD(lvl,("opt: %d ", gp_link->link_opts[i]));
+		if (gp_link->link_opts[i] & GPO_LINK_OPT_ENFORCED) {
+			DEBUGADD(lvl,("GPO_LINK_OPT_ENFORCED "));
+		}
+		if (gp_link->link_opts[i] & GPO_LINK_OPT_DISABLED) {
+			DEBUGADD(lvl,("GPO_LINK_OPT_DISABLED"));
+		}
+		DEBUGADD(lvl,("\n"));
+
+		if (ads != NULL && mem_ctx != NULL) {
+
+			struct GROUP_POLICY_OBJECT gpo;
+
+			status = ads_get_gpo(ads, mem_ctx,
+					     gp_link->link_names[i],
+					     NULL, NULL, &gpo);
+			if (!ADS_ERR_OK(status)) {
+				DEBUG(lvl,("get gpo for %s failed: %s\n",
+					gp_link->link_names[i],
+					ads_errstr(status)));
+				return;
+			}
+			dump_gpo(ads, mem_ctx, &gpo, lvl);
+		}
+	}
+}
+
+#endif /* HAVE_LDAP */
+
+/****************************************************************
+****************************************************************/
+
+static bool gpo_get_gp_ext_from_gpo(TALLOC_CTX *mem_ctx,
+				    uint32_t flags,
+				    struct GROUP_POLICY_OBJECT *gpo,
+				    struct GP_EXT **gp_ext)
+{
+	ZERO_STRUCTP(*gp_ext);
+
+	if (flags & GPO_INFO_FLAG_MACHINE) {
+
+		if (gpo->machine_extensions) {
+
+			if (!ads_parse_gp_ext(mem_ctx, gpo->machine_extensions,
+					      gp_ext)) {
+				return false;
+			}
+		}
+	} else {
+
+		if (gpo->user_extensions) {
+
+			if (!ads_parse_gp_ext(mem_ctx, gpo->user_extensions,
+					      gp_ext)) {
+				return false;
+			}
+		}
+	}
+
+	return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+ADS_STATUS gpo_process_a_gpo(ADS_STRUCT *ads,
+			     TALLOC_CTX *mem_ctx,
+			     const struct nt_user_token *token,
+			     struct registry_key *root_key,
+			     struct GROUP_POLICY_OBJECT *gpo,
+			     const char *extension_guid_filter,
+			     uint32_t flags)
+{
+	struct GP_EXT *gp_ext = NULL;
+	int i;
+
+	DEBUG(10,("gpo_process_a_gpo: processing gpo %s (%s)\n",
+		gpo->name, gpo->display_name));
+	if (extension_guid_filter) {
+		DEBUGADD(10,("gpo_process_a_gpo: using filter %s (%s)\n",
+			extension_guid_filter,
+			cse_gpo_guid_string_to_name(extension_guid_filter)));
+	}
+
+	if (!gpo_get_gp_ext_from_gpo(mem_ctx, flags, gpo, &gp_ext)) {
+		return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+	}
+
+	if (!gp_ext || !gp_ext->num_exts) {
+		if (flags & GPO_INFO_FLAG_VERBOSE) {
+			DEBUG(0,("gpo_process_a_gpo: "
+				"no policies in %s (%s) for this extension\n",
+				gpo->name, gpo->display_name));
+		}
+		return ADS_SUCCESS;
+	}
+
+	for (i=0; i<gp_ext->num_exts; i++) {
+
+		NTSTATUS ntstatus;
+
+		if (extension_guid_filter &&
+		    !strequal(extension_guid_filter,
+			      gp_ext->extensions_guid[i])) {
+			continue;
+		}
+
+		ntstatus = gpext_process_extension(ads, mem_ctx,
+						   flags, token, root_key, gpo,
+						   gp_ext->extensions_guid[i],
+						   gp_ext->snapins_guid[i]);
+		if (!NT_STATUS_IS_OK(ntstatus)) {
+			ADS_ERROR_NT(ntstatus);
+		}
+	}
+
+	return ADS_SUCCESS;
+}
+
+/****************************************************************
+****************************************************************/
+
+static ADS_STATUS gpo_process_gpo_list_by_ext(ADS_STRUCT *ads,
+					      TALLOC_CTX *mem_ctx,
+					      const struct nt_user_token *token,
+					      struct registry_key *root_key,
+					      struct GROUP_POLICY_OBJECT *gpo_list,
+					      const char *extensions_guid,
+					      uint32_t flags)
+{
+	ADS_STATUS status;
+	struct GROUP_POLICY_OBJECT *gpo;
+
+	for (gpo = gpo_list; gpo; gpo = gpo->next) {
+
+		if (gpo->link_type == GP_LINK_LOCAL) {
+			continue;
+		}
+
+
+		/* FIXME: we need to pass down the *list* down to the
+		 * extension, otherwise we cannot store the e.g. the *list* of
+		 * logon-scripts correctly (for more then one GPO) */
+
+		status = gpo_process_a_gpo(ads, mem_ctx, token, root_key,
+					   gpo, extensions_guid, flags);
+
+		if (!ADS_ERR_OK(status)) {
+			DEBUG(0,("failed to process gpo by ext: %s\n",
+				ads_errstr(status)));
+			return status;
+		}
+	}
+
+	return ADS_SUCCESS;
+}
+
+/****************************************************************
+****************************************************************/
+
+ADS_STATUS gpo_process_gpo_list(ADS_STRUCT *ads,
+				TALLOC_CTX *mem_ctx,
+				const struct nt_user_token *token,
+				struct GROUP_POLICY_OBJECT *gpo_list,
+				const char *extensions_guid_filter,
+				uint32_t flags)
+{
+	ADS_STATUS status = ADS_SUCCESS;
+	struct gp_extension *gp_ext_list = NULL;
+	struct gp_extension *gp_ext = NULL;
+	struct registry_key *root_key = NULL;
+	struct gp_registry_context *reg_ctx = NULL;
+	WERROR werr;
+
+	status = ADS_ERROR_NT(init_gp_extensions(mem_ctx));
+	if (!ADS_ERR_OK(status)) {
+		return status;
+	}
+
+	gp_ext_list = get_gp_extension_list();
+	if (!gp_ext_list) {
+		return ADS_ERROR_NT(NT_STATUS_DLL_INIT_FAILED);
+	}
+
+	/* get the key here */
+	if (flags & GPO_LIST_FLAG_MACHINE) {
+		werr = gp_init_reg_ctx(mem_ctx, KEY_HKLM, REG_KEY_WRITE,
+				       get_system_token(),
+				       &reg_ctx);
+	} else {
+		werr = gp_init_reg_ctx(mem_ctx, KEY_HKCU, REG_KEY_WRITE,
+				       token,
+				       &reg_ctx);
+	}
+	if (!W_ERROR_IS_OK(werr)) {
+		gp_free_reg_ctx(reg_ctx);
+		return ADS_ERROR_NT(werror_to_ntstatus(werr));
+	}
+
+	root_key = reg_ctx->curr_key;
+
+	for (gp_ext = gp_ext_list; gp_ext; gp_ext = gp_ext->next) {
+
+		const char *guid_str = NULL;
+
+		guid_str = GUID_string(mem_ctx, gp_ext->guid);
+		if (!guid_str) {
+			status = ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+			goto done;
+		}
+
+		if (extensions_guid_filter &&
+		    (!strequal(guid_str, extensions_guid_filter)))  {
+			continue;
+		}
+
+		DEBUG(0,("-------------------------------------------------\n"));
+		DEBUG(0,("gpo_process_gpo_list: processing ext: %s {%s}\n",
+			gp_ext->name, guid_str));
+
+
+		status = gpo_process_gpo_list_by_ext(ads, mem_ctx, token,
+						     root_key, gpo_list,
+						     guid_str, flags);
+		if (!ADS_ERR_OK(status)) {
+			goto done;
+		}
+	}
+
+ done:
+	gp_free_reg_ctx(reg_ctx);
+	TALLOC_FREE(root_key);
+	free_gp_extensions();
+
+	return status;
+}
+
+
+/****************************************************************
+ check wether the version number in a GROUP_POLICY_OBJECT match those of the
+ locally stored version. If not, fetch the required policy via CIFS
+****************************************************************/
+
+NTSTATUS check_refresh_gpo(ADS_STRUCT *ads,
+			   TALLOC_CTX *mem_ctx,
+			   uint32_t flags,
+			   struct GROUP_POLICY_OBJECT *gpo,
+			   struct cli_state **cli_out)
+{
+	NTSTATUS result;
+	char *server = NULL;
+	char *share = NULL;
+	char *nt_path = NULL;
+	char *unix_path = NULL;
+	uint32_t sysvol_gpt_version = 0;
+	char *display_name = NULL;
+	struct cli_state *cli = NULL;
+
+	result = gpo_explode_filesyspath(mem_ctx, gpo->file_sys_path,
+					 &server, &share, &nt_path, &unix_path);
+
+	if (!NT_STATUS_IS_OK(result)) {
+		goto out;
+	}
+
+	result = gpo_get_sysvol_gpt_version(mem_ctx,
+					    unix_path,
+					    &sysvol_gpt_version,
+					    &display_name);
+	if (!NT_STATUS_IS_OK(result) &&
+	    !NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_FILE)) {
+		DEBUG(10,("check_refresh_gpo: "
+			"failed to get local gpt version: %s\n",
+			nt_errstr(result)));
+		goto out;
+	}
+
+	DEBUG(10,("check_refresh_gpo: versions gpo %d sysvol %d\n",
+		gpo->version, sysvol_gpt_version));
+
+	/* FIXME: handle GPO_INFO_FLAG_FORCED_REFRESH from flags */
+
+	while (gpo->version > sysvol_gpt_version) {
+
+		DEBUG(1,("check_refresh_gpo: need to refresh GPO\n"));
+
+		if (*cli_out == NULL) {
+
+			result = cli_full_connection(&cli,
+					global_myname(),
+					ads->config.ldap_server_name,
+					/* server */
+					NULL, 0,
+					share, "A:",
+					ads->auth.user_name, NULL,
+					ads->auth.password,
+					CLI_FULL_CONNECTION_USE_KERBEROS |
+					CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS,
+					Undefined, NULL);
+			if (!NT_STATUS_IS_OK(result)) {
+				DEBUG(10,("check_refresh_gpo: "
+					"failed to connect: %s\n",
+					nt_errstr(result)));
+				goto out;
+			}
+
+			*cli_out = cli;
+		}
+
+		result = gpo_fetch_files(mem_ctx, *cli_out, gpo);
+		if (!NT_STATUS_IS_OK(result)) {
+			goto out;
+		}
+
+		result = gpo_get_sysvol_gpt_version(mem_ctx,
+						    unix_path,
+						    &sysvol_gpt_version,
+						    &display_name);
+		if (!NT_STATUS_IS_OK(result)) {
+			DEBUG(10,("check_refresh_gpo: "
+				"failed to get local gpt version: %s\n",
+				nt_errstr(result)));
+			goto out;
+		}
+
+		if (gpo->version == sysvol_gpt_version) {
+			break;
+		}
+	}
+
+	DEBUG(10,("Name:\t\t\t%s (%s)\n", gpo->display_name, gpo->name));
+	DEBUGADD(10,("sysvol GPT version:\t%d (user: %d, machine: %d)\n",
+		sysvol_gpt_version,
+		GPO_VERSION_USER(sysvol_gpt_version),
+		GPO_VERSION_MACHINE(sysvol_gpt_version)));
+	DEBUGADD(10,("LDAP GPO version:\t%d (user: %d, machine: %d)\n",
+		gpo->version,
+		GPO_VERSION_USER(gpo->version),
+		GPO_VERSION_MACHINE(gpo->version)));
+	DEBUGADD(10,("LDAP GPO link:\t\t%s\n", gpo->link));
+
+	result = NT_STATUS_OK;
+
+ out:
+	return result;
+
+}
+
+/****************************************************************
+ check wether the version numbers in the gpo_list match the locally stored, if
+ not, go and get each required GPO via CIFS
+ ****************************************************************/
+
+NTSTATUS check_refresh_gpo_list(ADS_STRUCT *ads,
+				TALLOC_CTX *mem_ctx,
+				uint32_t flags,
+				struct GROUP_POLICY_OBJECT *gpo_list)
+{
+	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
+	struct cli_state *cli = NULL;
+	struct GROUP_POLICY_OBJECT *gpo;
+
+	if (!gpo_list) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	for (gpo = gpo_list; gpo; gpo = gpo->next) {
+
+		result = check_refresh_gpo(ads, mem_ctx, flags, gpo, &cli);
+		if (!NT_STATUS_IS_OK(result)) {
+			goto out;
+		}
+	}
+
+	result = NT_STATUS_OK;
+
+ out:
+	if (cli) {
+		cli_shutdown(cli);
+	}
+
+	return result;
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS gpo_get_unix_path(TALLOC_CTX *mem_ctx,
+			   struct GROUP_POLICY_OBJECT *gpo,
+			   char **unix_path)
+{
+	char *server, *share, *nt_path;
+	return gpo_explode_filesyspath(mem_ctx, gpo->file_sys_path,
+				       &server, &share, &nt_path, unix_path);
+}
+
+/****************************************************************
+****************************************************************/
+
+char *gpo_flag_str(uint32_t flags)
+{
+	fstring str = "";
+
+	if (flags == 0) {
+		return NULL;
+	}
+
+	if (flags & GPO_INFO_FLAG_SLOWLINK)
+		fstrcat(str, "GPO_INFO_FLAG_SLOWLINK ");
+	if (flags & GPO_INFO_FLAG_VERBOSE)
+		fstrcat(str, "GPO_INFO_FLAG_VERBOSE ");
+	if (flags & GPO_INFO_FLAG_SAFEMODE_BOOT)
+		fstrcat(str, "GPO_INFO_FLAG_SAFEMODE_BOOT ");
+	if (flags & GPO_INFO_FLAG_NOCHANGES)
+		fstrcat(str, "GPO_INFO_FLAG_NOCHANGES ");
+	if (flags & GPO_INFO_FLAG_MACHINE)
+		fstrcat(str, "GPO_INFO_FLAG_MACHINE ");
+	if (flags & GPO_INFO_FLAG_LOGRSOP_TRANSITION)
+		fstrcat(str, "GPO_INFO_FLAG_LOGRSOP_TRANSITION ");
+	if (flags & GPO_INFO_FLAG_LINKTRANSITION)
+		fstrcat(str, "GPO_INFO_FLAG_LINKTRANSITION ");
+	if (flags & GPO_INFO_FLAG_FORCED_REFRESH)
+		fstrcat(str, "GPO_INFO_FLAG_FORCED_REFRESH ");
+	if (flags & GPO_INFO_FLAG_BACKGROUND)
+		fstrcat(str, "GPO_INFO_FLAG_BACKGROUND ");
+
+	return strdup(str);
+}
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS gp_find_file(TALLOC_CTX *mem_ctx,
+		      uint32_t flags,
+		      const char *filename,
+		      const char *suffix,
+		      const char **filename_out)
+{
+	const char *tmp = NULL;
+	struct stat sbuf;
+	const char *path = NULL;
+
+	if (flags & GPO_LIST_FLAG_MACHINE) {
+		path = "Machine";
+	} else {
+		path = "User";
+	}
+
+	tmp = talloc_asprintf(mem_ctx, "%s/%s/%s", filename,
+			      path, suffix);
+	NT_STATUS_HAVE_NO_MEMORY(tmp);
+
+	if (stat(tmp, &sbuf) == 0) {
+		*filename_out = tmp;
+		return NT_STATUS_OK;
+	}
+
+	path = talloc_strdup_upper(mem_ctx, path);
+	NT_STATUS_HAVE_NO_MEMORY(path);
+
+	tmp = talloc_asprintf(mem_ctx, "%s/%s/%s", filename,
+			      path, suffix);
+	NT_STATUS_HAVE_NO_MEMORY(tmp);
+
+	if (sys_stat(tmp, &sbuf) == 0) {
+		*filename_out = tmp;
+		return NT_STATUS_OK;
+	}
+
+	return NT_STATUS_NO_SUCH_FILE;
+}
+
+/****************************************************************
+****************************************************************/
+
+ADS_STATUS gp_get_machine_token(ADS_STRUCT *ads,
+				TALLOC_CTX *mem_ctx,
+				const char *dn,
+				struct nt_user_token **token)
+{
+	struct nt_user_token *ad_token = NULL;
+	ADS_STATUS status;
+	NTSTATUS ntstatus;
+
+#ifndef HAVE_ADS
+	return ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
+#endif
+	status = ads_get_sid_token(ads, mem_ctx, dn, &ad_token);
+	if (!ADS_ERR_OK(status)) {
+		return status;
+	}
+
+	ntstatus = merge_nt_token(mem_ctx, ad_token, get_system_token(),
+				  token);
+	if (!NT_STATUS_IS_OK(ntstatus)) {
+		return ADS_ERROR_NT(ntstatus);
+	}
+
+	return ADS_SUCCESS;
+}