Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 440 insertions, 0 deletions

diff --git a/source3/libgpo/gpext/registry.c b/source3/libgpo/gpext/registry.c
new file mode 100644
index 0000000..ffa1d02
--- /dev/null
+++ b/source3/libgpo/gpext/registry.c
@@ -0,0 +1,440 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Support
+ *  Copyright (C) Guenther Deschner 2007-2008,2010
+ *
+ *  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_ini.h"
+#include "../libgpo/gpo.h"
+#include "libgpo/gpo_proto.h"
+#include "registry.h"
+#include "../librpc/gen_ndr/ndr_preg.h"
+#include "libgpo/gpext/gpext.h"
+
+#define GP_EXT_NAME "registry"
+
+/* more info can be found at:
+ * http://msdn2.microsoft.com/en-us/library/aa374407.aspx */
+
+#define GP_REGPOL_FILE  "Registry.pol"
+
+#define GP_REGPOL_FILE_SIGNATURE 0x67655250 /* 'PReg' */
+#define GP_REGPOL_FILE_VERSION 1
+
+static TALLOC_CTX *ctx = NULL;
+
+NTSTATUS gpext_registry_init(TALLOC_CTX *mem_ctx);
+
+/****************************************************************
+****************************************************************/
+
+static bool reg_parse_value(TALLOC_CTX *mem_ctx,
+			    const char **value,
+			    enum gp_reg_action *action)
+{
+	if (!*value) {
+		*action = GP_REG_ACTION_ADD_KEY;
+		return true;
+	}
+
+	if (strncmp(*value, "**", 2) != 0) {
+		*action = GP_REG_ACTION_ADD_VALUE;
+		return true;
+	}
+
+	if (strnequal(*value, "**DelVals.", 10)) {
+		*action = GP_REG_ACTION_DEL_ALL_VALUES;
+		return true;
+	}
+
+	if (strnequal(*value, "**Del.", 6)) {
+		*value = talloc_strdup(mem_ctx, *value + 6);
+		*action = GP_REG_ACTION_DEL_VALUE;
+		return true;
+	}
+
+	if (strnequal(*value, "**SecureKey", 11)) {
+		if (strnequal(*value, "**SecureKey=1", 13)) {
+			*action = GP_REG_ACTION_SEC_KEY_SET;
+			return true;
+		}
+
+ /*************** not tested from here on ***************/
+		if (strnequal(*value, "**SecureKey=0", 13)) {
+			smb_panic("not supported: **SecureKey=0");
+			*action = GP_REG_ACTION_SEC_KEY_RESET;
+			return true;
+		}
+		DEBUG(0,("unknown: SecureKey: %s\n", *value));
+		smb_panic("not supported SecureKey method");
+		return false;
+	}
+
+	if (strnequal(*value, "**DeleteValues", strlen("**DeleteValues"))) {
+		smb_panic("not supported: **DeleteValues");
+		*action = GP_REG_ACTION_DEL_VALUES;
+		return false;
+	}
+
+	if (strnequal(*value, "**DeleteKeys", strlen("**DeleteKeys"))) {
+		smb_panic("not supported: **DeleteKeys");
+		*action = GP_REG_ACTION_DEL_KEYS;
+		return false;
+	}
+
+	DEBUG(0,("unknown value: %s\n", *value));
+	smb_panic(*value);
+	return false;
+}
+
+/****************************************************************
+****************************************************************/
+
+static bool gp_reg_entry_from_file_entry(TALLOC_CTX *mem_ctx,
+					 struct preg_entry *r,
+					 struct gp_registry_entry **reg_entry)
+{
+	struct registry_value *data = NULL;
+	struct gp_registry_entry *entry = NULL;
+	enum gp_reg_action action = GP_REG_ACTION_NONE;
+	enum ndr_err_code ndr_err;
+
+	ZERO_STRUCTP(*reg_entry);
+
+	data = talloc_zero(mem_ctx, struct registry_value);
+	if (!data)
+		return false;
+
+	data->type = r->type;
+
+	ndr_err = ndr_push_union_blob(
+		&data->data,
+		mem_ctx,
+		&r->data,
+		r->type,
+		(ndr_push_flags_fn_t)ndr_push_winreg_Data);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		DBG_WARNING("ndr_push_winreg_Data failed: %s\n",
+			    ndr_errstr(ndr_err));
+		return false;
+	}
+
+	entry = talloc_zero(mem_ctx, struct gp_registry_entry);
+	if (!entry)
+		return false;
+
+	if (!reg_parse_value(mem_ctx, &r->valuename, &action))
+		return false;
+
+	entry->key = talloc_strdup(entry, r->keyname);
+	entry->value = talloc_strdup(entry, r->valuename);
+	entry->data = data;
+	entry->action = action;
+
+	*reg_entry = entry;
+
+	return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS reg_parse_registry(TALLOC_CTX *mem_ctx,
+				   uint32_t flags,
+				   const char *filename,
+				   struct gp_registry_entry **entries_p,
+				   size_t *num_entries_p)
+{
+	DATA_BLOB blob;
+	NTSTATUS status;
+	enum ndr_err_code ndr_err;
+	const char *real_filename = NULL;
+	struct preg_file r;
+	struct gp_registry_entry *entries = NULL;
+	size_t num_entries = 0;
+	int i;
+
+	status = gp_find_file(mem_ctx,
+			      flags,
+			      filename,
+			      GP_REGPOL_FILE,
+			      &real_filename);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	blob.data = (uint8_t *)file_load(real_filename, &blob.length, 0, NULL);
+	if (!blob.data) {
+		return NT_STATUS_CANNOT_LOAD_REGISTRY_FILE;
+	}
+
+	ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, &r,
+			(ndr_pull_flags_fn_t)ndr_pull_preg_file);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		status = ndr_map_error2ntstatus(ndr_err);
+		goto out;
+	}
+
+	if (flags & GPO_INFO_FLAG_VERBOSE) {
+		NDR_PRINT_DEBUG(preg_file, &r);
+	}
+
+	if (!strequal(r.header.signature, "PReg")) {
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto out;
+	}
+
+	if (r.header.version != GP_REGPOL_FILE_VERSION) {
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto out;
+	}
+
+	for (i=0; i < r.num_entries; i++) {
+
+		struct gp_registry_entry *r_entry = NULL;
+
+		if (!gp_reg_entry_from_file_entry(mem_ctx,
+						  &r.entries[i],
+						  &r_entry)) {
+			status = NT_STATUS_NO_MEMORY;
+			goto out;
+		}
+
+		if (!add_gp_registry_entry_to_array(mem_ctx,
+						    r_entry,
+						    &entries,
+						    &num_entries)) {
+			status = NT_STATUS_NO_MEMORY;
+			goto out;
+		}
+	}
+
+	*entries_p = entries;
+	*num_entries_p = num_entries;
+
+	status = NT_STATUS_OK;
+
+ out:
+	data_blob_free(&blob);
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+static WERROR reg_apply_registry(TALLOC_CTX *mem_ctx,
+				 const struct security_token *token,
+				 struct registry_key *root_key,
+				 uint32_t flags,
+				 struct gp_registry_entry *entries,
+				 size_t num_entries)
+{
+	struct gp_registry_context *reg_ctx = NULL;
+	WERROR werr;
+	size_t i;
+
+	if (num_entries == 0) {
+		return WERR_OK;
+	}
+
+#if 0
+	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);
+	}
+	W_ERROR_NOT_OK_RETURN(werr);
+#endif
+	for (i=0; i<num_entries; i++) {
+
+		/* FIXME: maybe we should check here if we attempt to go beyond
+		 * the 4 allowed reg keys */
+
+		werr = reg_apply_registry_entry(mem_ctx, root_key,
+						reg_ctx,
+						&(entries)[i],
+						token, flags);
+		if (!W_ERROR_IS_OK(werr)) {
+			DEBUG(0,("failed to apply registry: %s\n",
+				win_errstr(werr)));
+			goto done;
+		}
+	}
+
+done:
+	gp_free_reg_ctx(reg_ctx);
+	return werr;
+}
+
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS registry_process_group_policy(TALLOC_CTX *mem_ctx,
+					      uint32_t flags,
+					      struct registry_key *root_key,
+					      const struct security_token *token,
+					      const struct GROUP_POLICY_OBJECT *deleted_gpo_list,
+					      const struct GROUP_POLICY_OBJECT *changed_gpo_list)
+{
+	NTSTATUS status;
+	WERROR werr;
+	struct gp_registry_entry *entries = NULL;
+	size_t num_entries = 0;
+	char *unix_path = NULL;
+	const struct GROUP_POLICY_OBJECT *gpo;
+	char *gpo_cache_path = cache_path(talloc_tos(), GPO_CACHE_DIR);
+	if (gpo_cache_path == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* implementation of the policy callback function, see
+	 * http://msdn.microsoft.com/en-us/library/aa373494%28v=vs.85%29.aspx
+	 * for details - gd */
+
+	/* for now do not process the list of deleted group policies
+
+	for (gpo = deleted_gpo_list; gpo; gpo = gpo->next) {
+	}
+
+	*/
+
+	for (gpo = changed_gpo_list; gpo; gpo = gpo->next) {
+
+		gpext_debug_header(0, "registry_process_group_policy", flags,
+				   gpo, GP_EXT_GUID_REGISTRY, NULL);
+
+		status = gpo_get_unix_path(mem_ctx, gpo_cache_path,
+					   gpo, &unix_path);
+		if (!NT_STATUS_IS_OK(status)) {
+			goto err_cache_path_free;
+		}
+
+		status = reg_parse_registry(mem_ctx,
+					    flags,
+					    unix_path,
+					    &entries,
+					    &num_entries);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0,("failed to parse registry: %s\n",
+				nt_errstr(status)));
+			goto err_cache_path_free;
+		}
+
+		dump_reg_entries(flags, "READ", entries, num_entries);
+
+		werr = reg_apply_registry(mem_ctx, token, root_key, flags,
+					  entries, num_entries);
+		if (!W_ERROR_IS_OK(werr)) {
+			DEBUG(0,("failed to apply registry: %s\n",
+				win_errstr(werr)));
+			status = werror_to_ntstatus(werr);
+			goto err_cache_path_free;
+		}
+	}
+	status = NT_STATUS_OK;
+
+err_cache_path_free:
+	talloc_free(gpo_cache_path);
+	talloc_free(entries);
+	return status;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS registry_get_reg_config(TALLOC_CTX *mem_ctx,
+					struct gp_extension_reg_info **reg_info)
+{
+	NTSTATUS status;
+	struct gp_extension_reg_info *info = NULL;
+	struct gp_extension_reg_table table[] = {
+		{ "ProcessGroupPolicy", REG_SZ, "registry_process_group_policy" },
+		{ NULL, REG_NONE, NULL }
+	};
+
+	info = talloc_zero(mem_ctx, struct gp_extension_reg_info);
+	NT_STATUS_HAVE_NO_MEMORY(info);
+
+	status = gpext_info_add_entry(mem_ctx, GP_EXT_NAME,
+				      GP_EXT_GUID_REGISTRY,
+				      table, info);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	*reg_info = info;
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS registry_initialize(TALLOC_CTX *mem_ctx)
+{
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static NTSTATUS registry_shutdown(void)
+{
+	NTSTATUS status;
+
+	status = gpext_unregister_gp_extension(GP_EXT_NAME);
+	if (NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	TALLOC_FREE(ctx);
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************
+****************************************************************/
+
+static struct gp_extension_methods registry_methods = {
+	.initialize		= registry_initialize,
+	.process_group_policy	= registry_process_group_policy,
+	.get_reg_config		= registry_get_reg_config,
+	.shutdown		= registry_shutdown
+};
+
+/****************************************************************
+****************************************************************/
+
+NTSTATUS gpext_registry_init(TALLOC_CTX *mem_ctx)
+{
+	NTSTATUS status;
+
+	ctx = talloc_init("gpext_registry_init");
+	NT_STATUS_HAVE_NO_MEMORY(ctx);
+
+	status = gpext_register_gp_extension(ctx, SMB_GPEXT_INTERFACE_VERSION,
+					     GP_EXT_NAME, GP_EXT_GUID_REGISTRY,
+					     &registry_methods);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(ctx);
+	}
+
+	return status;
+}