--- /dev/null
+/*
+ * 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"
+
+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_P(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_P(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_P(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_ARRAY(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_ARRAY(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_P(mem_ctx, struct gp_extension_reg_entry);
+ NT_STATUS_HAVE_NO_MEMORY(reg_entry);
+
+ data = TALLOC_ZERO_P(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(lib_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,
+ ®_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",
+ dos_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;
+}
projects / thirdparty / samba.git / commitdiff
