summaryrefslogtreecommitdiffstats
path: root/encryptedfs_provisioning.c
diff options
context:
space:
mode:
Diffstat (limited to 'encryptedfs_provisioning.c')
-rw-r--r--encryptedfs_provisioning.c283
1 files changed, 0 insertions, 283 deletions
diff --git a/encryptedfs_provisioning.c b/encryptedfs_provisioning.c
deleted file mode 100644
index 601c817de..000000000
--- a/encryptedfs_provisioning.c
+++ /dev/null
@@ -1,283 +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 "encryptedfs_provisioning.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* encrypted_fs_enabled_property = "persist.security.secfs.enabled";
-const char* encrypted_fs_property_dir = "/data/property/";
-const char* encrypted_fs_system_dir = "/data/system/";
-const char* encrypted_fs_key_file_name = "/data/fs_key.dat";
-const char* encrypted_fs_salt_file_name = "/data/hash_salt.dat";
-const char* encrypted_fs_hash_file_src_name = "/data/system/password.key";
-const char* encrypted_fs_hash_file_dst_name = "/data/hash.dat";
-const char* encrypted_fs_entropy_file_src_name = "/data/system/entropy.dat";
-const char* encrypted_fs_entropy_file_dst_name = "/data/ported_entropy.dat";
-
-void get_property_file_name(char *buffer, const char *property_name) {
- sprintf(buffer, "%s%s", encrypted_fs_property_dir, property_name);
-}
-
-int get_binary_file_contents(char *buffer, int buf_size, const char *file_name, int *out_size) {
- FILE *in_file;
- int read_bytes;
-
- in_file = fopen(file_name, "r");
- if (in_file == NULL) {
- LOGE("Secure FS: error accessing key file.");
- return ENCRYPTED_FS_ERROR;
- }
-
- read_bytes = fread(buffer, 1, buf_size, in_file);
- if (out_size == NULL) {
- if (read_bytes != buf_size) {
- // Error or unexpected data
- fclose(in_file);
- LOGE("Secure FS: error reading conmplete key.");
- return ENCRYPTED_FS_ERROR;
- }
- } else {
- *out_size = read_bytes;
- }
- fclose(in_file);
- return ENCRYPTED_FS_OK;
-}
-
-int set_binary_file_contents(char *buffer, int buf_size, const char *file_name) {
- FILE *out_file;
- int write_bytes;
-
- out_file = fopen(file_name, "w");
- if (out_file == NULL) {
- LOGE("Secure FS: error setting up key file.");
- return ENCRYPTED_FS_ERROR;
- }
-
- write_bytes = fwrite(buffer, 1, buf_size, out_file);
- if (write_bytes != buf_size) {
- // Error or unexpected data
- fclose(out_file);
- LOGE("Secure FS: error reading conmplete key.");
- return ENCRYPTED_FS_ERROR;
- }
-
- fclose(out_file);
- return ENCRYPTED_FS_OK;
-}
-
-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("Secure FS: error accessing properties.");
- return ENCRYPTED_FS_ERROR;
- }
-
- read_data = fgets(buffer, buf_size, in_file);
- if (read_data == NULL) {
- // Error or unexpected data
- fclose(in_file);
- LOGE("Secure FS: error accessing properties.");
- return ENCRYPTED_FS_ERROR;
- }
-
- fclose(in_file);
- return ENCRYPTED_FS_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("Secure FS: error setting up properties.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = fputs(buffer, out_file);
- if (result != 0) {
- // Error or unexpected data
- fclose(out_file);
- LOGE("Secure FS: error setting up properties.");
- return ENCRYPTED_FS_ERROR;
- }
-
- fflush(out_file);
- fclose(out_file);
- return ENCRYPTED_FS_OK;
-}
-
-int read_encrypted_fs_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("Secure FS: error accessing properties.");
- return ENCRYPTED_FS_ERROR;
- }
-
- return ENCRYPTED_FS_OK;
-}
-
-int write_encrypted_fs_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(encrypted_fs_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 ENCRYPTED_FS_ERROR;
- }
- if (result < 0) {
- return result;
- }
-
- return ENCRYPTED_FS_OK;
-}
-
-int read_encrypted_fs_info(encrypted_fs_info *encrypted_fs_data) {
- int result;
- int value;
- result = ensure_path_mounted("/data");
- if (result != 0) {
- LOGE("Secure FS: error mounting userdata partition.");
- return ENCRYPTED_FS_ERROR;
- }
-
- // Read the pre-generated encrypted FS key, password hash and salt.
- result = get_binary_file_contents(encrypted_fs_data->key, ENCRYPTED_FS_KEY_SIZE,
- encrypted_fs_key_file_name, NULL);
- if (result != 0) {
- LOGE("Secure FS: error reading generated file system key.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = get_binary_file_contents(encrypted_fs_data->salt, ENCRYPTED_FS_SALT_SIZE,
- encrypted_fs_salt_file_name, &(encrypted_fs_data->salt_length));
- if (result != 0) {
- LOGE("Secure FS: error reading file system salt.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = get_binary_file_contents(encrypted_fs_data->hash, ENCRYPTED_FS_MAX_HASH_SIZE,
- encrypted_fs_hash_file_src_name, &(encrypted_fs_data->hash_length));
- if (result != 0) {
- LOGE("Secure FS: error reading password hash.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = get_binary_file_contents(encrypted_fs_data->entropy, ENTROPY_MAX_SIZE,
- encrypted_fs_entropy_file_src_name, &(encrypted_fs_data->entropy_length));
- if (result != 0) {
- LOGE("Secure FS: error reading ported entropy.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = ensure_path_unmounted("/data");
- if (result != 0) {
- LOGE("Secure FS: error unmounting data partition.");
- return ENCRYPTED_FS_ERROR;
- }
-
- return ENCRYPTED_FS_OK;
-}
-
-int restore_encrypted_fs_info(encrypted_fs_info *encrypted_fs_data) {
- int result;
- result = ensure_path_mounted("/data");
- if (result != 0) {
- LOGE("Secure FS: error mounting userdata partition.");
- return ENCRYPTED_FS_ERROR;
- }
-
- // Write the pre-generated secure FS key, password hash and salt.
- result = set_binary_file_contents(encrypted_fs_data->key, ENCRYPTED_FS_KEY_SIZE,
- encrypted_fs_key_file_name);
- if (result != 0) {
- LOGE("Secure FS: error writing generated file system key.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = set_binary_file_contents(encrypted_fs_data->salt, encrypted_fs_data->salt_length,
- encrypted_fs_salt_file_name);
- if (result != 0) {
- LOGE("Secure FS: error writing file system salt.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = set_binary_file_contents(encrypted_fs_data->hash, encrypted_fs_data->hash_length,
- encrypted_fs_hash_file_dst_name);
- if (result != 0) {
- LOGE("Secure FS: error writing password hash.");
- return ENCRYPTED_FS_ERROR;
- }
-
- result = set_binary_file_contents(encrypted_fs_data->entropy, encrypted_fs_data->entropy_length,
- encrypted_fs_entropy_file_dst_name);
- if (result != 0) {
- LOGE("Secure FS: error writing ported entropy.");
- return ENCRYPTED_FS_ERROR;
- }
-
- // Set the secure FS properties to their respective values
- result = write_encrypted_fs_boolean_property(encrypted_fs_enabled_property, encrypted_fs_data->mode);
- if (result != 0) {
- return result;
- }
-
- result = ensure_path_unmounted("/data");
- if (result != 0) {
- LOGE("Secure FS: error unmounting data partition.");
- return ENCRYPTED_FS_ERROR;
- }
-
- return ENCRYPTED_FS_OK;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 22:54:16 +0200