diff options
Diffstat (limited to 'efs_migration.c')
| -rw-r--r-- | efs_migration.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/efs_migration.c b/efs_migration.c deleted file mode 100644 index aeadd1865..000000000 --- a/efs_migration.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (C) 2009 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/mount.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> - -#include "efs_migration.h" -#include "cutils/misc.h" -#include "cutils/properties.h" -#include "common.h" -#include "mtdutils/mtdutils.h" -#include "mtdutils/mounts.h" -#include "roots.h" - -const char* efs_enabled_property = "persist.security.efs.enabled"; -const char* efs_transition_property = "persist.security.efs.trans"; -const char* efs_property_dir = "/data/property/"; - -void get_property_file_name(char *buffer, const char *property_name) { - sprintf(buffer, "%s%s", efs_property_dir, property_name); -} - -int get_text_file_contents(char *buffer, int buf_size, char *file_name) { - FILE *in_file; - char *read_data; - - in_file = fopen(file_name, "r"); - if (in_file == NULL) { - LOGE("Encrypted FS: error accessing properties."); - return EFS_ERROR; - } - - read_data = fgets(buffer, buf_size, in_file); - if (read_data == NULL) { - // Error or unexpected data - fclose(in_file); - LOGE("Encrypted FS: error accessing properties."); - return EFS_ERROR; - } - - fclose(in_file); - return EFS_OK; -} - -int set_text_file_contents(char *buffer, char *file_name) { - FILE *out_file; - int result; - - out_file = fopen(file_name, "w"); - if (out_file == NULL) { - LOGE("Encrypted FS: error setting up properties."); - return EFS_ERROR; - } - - result = fputs(buffer, out_file); - if (result != 0) { - // Error or unexpected data - fclose(out_file); - LOGE("Encrypted FS: error setting up properties."); - return EFS_ERROR; - } - - fflush(out_file); - fclose(out_file); - return EFS_OK; -} - - -int read_efs_boolean_property(const char *prop_name, int *value) { - char prop_file_name[PROPERTY_KEY_MAX + 32]; - char prop_value[PROPERTY_VALUE_MAX]; - int result; - - get_property_file_name(prop_file_name, prop_name); - result = get_text_file_contents(prop_value, PROPERTY_VALUE_MAX, prop_file_name); - - if (result < 0) { - return result; - } - - if (strncmp(prop_value, "1", 1) == 0) { - *value = 1; - } else if (strncmp(prop_value, "0", 1) == 0) { - *value = 0; - } else { - LOGE("Encrypted FS: error accessing properties."); - return EFS_ERROR; - } - - return EFS_OK; -} - -int write_efs_boolean_property(const char *prop_name, int value) { - char prop_file_name[PROPERTY_KEY_MAX + 32]; - char prop_value[PROPERTY_VALUE_MAX]; - int result; - - get_property_file_name(prop_file_name, prop_name); - - // Create the directory if needed - mkdir(efs_property_dir, 0755); - if (value == 1) { - result = set_text_file_contents("1", prop_file_name); - } else if (value == 0) { - result = set_text_file_contents("0", prop_file_name); - } else { - return EFS_ERROR; - } - if (result < 0) { - return result; - } - - return EFS_OK; -} - -int read_encrypted_fs_info(encrypted_fs_info *efs_data) { - int result; - int value; - result = ensure_root_path_mounted("DATA:"); - if (result != 0) { - LOGE("Encrypted FS: error mounting userdata partition."); - return EFS_ERROR; - } - - // STOPSHIP: Read the EFS key from a file (TBD later) - // Future code goes here... - - result = ensure_root_path_unmounted("DATA:"); - if (result != 0) { - LOGE("Encrypted FS: error unmounting data partition."); - return EFS_ERROR; - } - - return EFS_OK; -} - -int restore_encrypted_fs_info(encrypted_fs_info *efs_data) { - int result; - result = ensure_root_path_mounted("DATA:"); - if (result != 0) { - LOGE("Encrypted FS: error mounting userdata partition."); - return EFS_ERROR; - } - - // Set the EFS properties to their respective values - result = write_efs_boolean_property(efs_enabled_property, efs_data->encrypted_fs_mode); - if (result != 0) { - return result; - } - - // Signal "transition" of Encrypted File System settings - result = write_efs_boolean_property(efs_transition_property, 1); - if (result != 0) { - return result; - } - - result = ensure_root_path_unmounted("DATA:"); - if (result != 0) { - LOGE("Encrypted FS: error unmounting data partition."); - return EFS_ERROR; - } - - return EFS_OK; -} - |