From 540d57f25adc24d55eb233799bc474935d65911c Mon Sep 17 00:00:00 2001 From: Doug Zongker Date: Tue, 18 Jan 2011 13:36:58 -0800 Subject: remove encrypted filesystem code from recovery This was never used; encrypted filesystems are being done a different way now. Change-Id: I519c57b9be44d001f0b81516af7bfc252069892b --- Android.mk | 3 +- encryptedfs_provisioning.c | 283 --------------------------------------------- encryptedfs_provisioning.h | 51 -------- recovery.c | 64 +--------- 4 files changed, 2 insertions(+), 399 deletions(-) delete mode 100644 encryptedfs_provisioning.c delete mode 100644 encryptedfs_provisioning.h diff --git a/Android.mk b/Android.mk index 27ffec7..cacb628 100644 --- a/Android.mk +++ b/Android.mk @@ -12,8 +12,7 @@ LOCAL_SRC_FILES := \ install.c \ roots.c \ ui.c \ - verifier.c \ - encryptedfs_provisioning.c + verifier.c LOCAL_MODULE := recovery diff --git a/encryptedfs_provisioning.c b/encryptedfs_provisioning.c deleted file mode 100644 index 601c817..0000000 --- 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 -#include -#include -#include -#include -#include -#include - -#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; -} diff --git a/encryptedfs_provisioning.h b/encryptedfs_provisioning.h deleted file mode 100644 index 284605d..0000000 --- a/encryptedfs_provisioning.h +++ /dev/null @@ -1,51 +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 - -#ifndef __ENCRYPTEDFS_PROVISIONING_H__ -#define __ENCRYPTEDFS_PROVISIONING_H__ - -#define MODE_ENCRYPTED_FS_DISABLED 0 -#define MODE_ENCRYPTED_FS_ENABLED 1 - -#define ENCRYPTED_FS_OK 0 -#define ENCRYPTED_FS_ERROR (-1) - -#define ENCRYPTED_FS_KEY_SIZE 16 -#define ENCRYPTED_FS_SALT_SIZE 16 -#define ENCRYPTED_FS_MAX_HASH_SIZE 128 -#define ENTROPY_MAX_SIZE 4096 - -struct encrypted_fs_info { - int mode; - char key[ENCRYPTED_FS_KEY_SIZE]; - char salt[ENCRYPTED_FS_SALT_SIZE]; - int salt_length; - char hash[ENCRYPTED_FS_MAX_HASH_SIZE]; - int hash_length; - char entropy[ENTROPY_MAX_SIZE]; - int entropy_length; -}; - -typedef struct encrypted_fs_info encrypted_fs_info; - -int read_encrypted_fs_info(encrypted_fs_info *secure_fs_data); - -int restore_encrypted_fs_info(encrypted_fs_info *secure_data); - -#endif /* __ENCRYPTEDFS_PROVISIONING_H__ */ - diff --git a/recovery.c b/recovery.c index 9ad075d..aebfba4 100644 --- a/recovery.c +++ b/recovery.c @@ -38,14 +38,12 @@ #include "minzip/DirUtil.h" #include "roots.h" #include "recovery_ui.h" -#include "encryptedfs_provisioning.h" static const struct option OPTIONS[] = { { "send_intent", required_argument, NULL, 's' }, { "update_package", required_argument, NULL, 'u' }, { "wipe_data", no_argument, NULL, 'w' }, { "wipe_cache", no_argument, NULL, 'c' }, - { "set_encrypted_filesystems", required_argument, NULL, 'e' }, { "show_text", no_argument, NULL, 't' }, { NULL, 0, NULL, 0 }, }; @@ -114,26 +112,6 @@ static const char *SIDELOAD_TEMP_DIR = "/tmp/sideload"; * 8g. finish_recovery() erases BCB * -- after this, rebooting will (try to) restart the main system -- * 9. main() calls reboot() to boot main system - * - * SECURE FILE SYSTEMS ENABLE/DISABLE - * 1. user selects "enable encrypted file systems" - * 2. main system writes "--set_encrypted_filesystems=on|off" to - * /cache/recovery/command - * 3. main system reboots into recovery - * 4. get_args() writes BCB with "boot-recovery" and - * "--set_encrypted_filesystems=on|off" - * -- after this, rebooting will restart the transition -- - * 5. read_encrypted_fs_info() retrieves encrypted file systems settings from /data - * Settings include: property to specify the Encrypted FS istatus and - * FS encryption key if enabled (not yet implemented) - * 6. erase_volume() reformats /data - * 7. erase_volume() reformats /cache - * 8. restore_encrypted_fs_info() writes required encrypted file systems settings to /data - * Settings include: property to specify the Encrypted FS status and - * FS encryption key if enabled (not yet implemented) - * 9. finish_recovery() erases BCB - * -- after this, rebooting will restart the main system -- - * 10. main() calls reboot() to boot main system */ static const int MAX_ARG_LENGTH = 4096; @@ -708,10 +686,7 @@ main(int argc, char **argv) { int previous_runs = 0; const char *send_intent = NULL; const char *update_package = NULL; - const char *encrypted_fs_mode = NULL; int wipe_data = 0, wipe_cache = 0; - int toggle_secure_fs = 0; - encrypted_fs_info encrypted_fs_data; int arg; while ((arg = getopt_long(argc, argv, "", OPTIONS, NULL)) != -1) { @@ -721,7 +696,6 @@ main(int argc, char **argv) { case 'u': update_package = optarg; break; case 'w': wipe_data = wipe_cache = 1; break; case 'c': wipe_cache = 1; break; - case 'e': encrypted_fs_mode = optarg; toggle_secure_fs = 1; break; case 't': ui_show_text(1); break; case '?': LOGE("Invalid command argument\n"); @@ -758,43 +732,7 @@ main(int argc, char **argv) { int status = INSTALL_SUCCESS; - if (toggle_secure_fs) { - if (strcmp(encrypted_fs_mode,"on") == 0) { - encrypted_fs_data.mode = MODE_ENCRYPTED_FS_ENABLED; - ui_print("Enabling Encrypted FS.\n"); - } else if (strcmp(encrypted_fs_mode,"off") == 0) { - encrypted_fs_data.mode = MODE_ENCRYPTED_FS_DISABLED; - ui_print("Disabling Encrypted FS.\n"); - } else { - ui_print("Error: invalid Encrypted FS setting.\n"); - status = INSTALL_ERROR; - } - - // Recovery strategy: if the data partition is damaged, disable encrypted file systems. - // This preventsthe device recycling endlessly in recovery mode. - if ((encrypted_fs_data.mode == MODE_ENCRYPTED_FS_ENABLED) && - (read_encrypted_fs_info(&encrypted_fs_data))) { - ui_print("Encrypted FS change aborted, resetting to disabled state.\n"); - encrypted_fs_data.mode = MODE_ENCRYPTED_FS_DISABLED; - } - - if (status != INSTALL_ERROR) { - if (erase_volume("/data")) { - ui_print("Data wipe failed.\n"); - status = INSTALL_ERROR; - } else if (erase_volume("/cache")) { - ui_print("Cache wipe failed.\n"); - status = INSTALL_ERROR; - } else if ((encrypted_fs_data.mode == MODE_ENCRYPTED_FS_ENABLED) && - (restore_encrypted_fs_info(&encrypted_fs_data))) { - ui_print("Encrypted FS change aborted.\n"); - status = INSTALL_ERROR; - } else { - ui_print("Successfully updated Encrypted FS.\n"); - status = INSTALL_SUCCESS; - } - } - } else if (update_package != NULL) { + if (update_package != NULL) { status = install_package(update_package); if (status != INSTALL_SUCCESS) ui_print("Installation aborted.\n"); } else if (wipe_data) { -- cgit v1.1