diff options
Diffstat (limited to 'source3/libgpo/gpext/registry.c')
| -rw-r--r-- | source3/libgpo/gpext/registry.c | 440 |
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(), + ®_ctx); + } else { + werr = gp_init_reg_ctx(mem_ctx, KEY_HKCU, REG_KEY_WRITE, + token, + ®_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, + ®istry_methods); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(ctx); + } + + return status; +} |