diff options
Diffstat (limited to 'crypto/vold_decrypt')
| -rw-r--r-- | crypto/vold_decrypt/Android.mk | 87 | ||||
| -rwxr-xr-x | crypto/vold_decrypt/init.recovery.vold_decrypt.qseecomd.rc | 14 | ||||
| -rwxr-xr-x | crypto/vold_decrypt/init.recovery.vold_decrypt.rc | 10 | ||||
| -rw-r--r-- | crypto/vold_decrypt/vold_decrypt.cpp | 599 | ||||
| -rw-r--r-- | crypto/vold_decrypt/vold_decrypt.h | 26 |
5 files changed, 736 insertions, 0 deletions
diff --git a/crypto/vold_decrypt/Android.mk b/crypto/vold_decrypt/Android.mk new file mode 100644 index 000000000..e371c24e7 --- /dev/null +++ b/crypto/vold_decrypt/Android.mk @@ -0,0 +1,87 @@ +# Copyright (C) 2017 TeamWin Recovery 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. + +LOCAL_PATH := $(call my-dir) + +ifeq ($(TW_INCLUDE_CRYPTO), true) + ifneq ($(TW_CRYPTO_USE_SYSTEM_VOLD),) + ifneq ($(TW_CRYPTO_USE_SYSTEM_VOLD),false) + + + # Parse TW_CRYPTO_USE_SYSTEM_VOLD + ifeq ($(TW_CRYPTO_USE_SYSTEM_VOLD),true) + # Just enabled, so only vold + vdc + services := + else + # Additional services needed by vold + services := $(TW_CRYPTO_USE_SYSTEM_VOLD) + endif + + # List of .rc files for each additional service + rc_files := $(foreach item,$(services),init.recovery.vold_decrypt.$(item).rc) + + + include $(CLEAR_VARS) + LOCAL_MODULE := init.recovery.vold_decrypt.rc + LOCAL_MODULE_TAGS := eng + LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES + + # Cannot send to TARGET_RECOVERY_ROOT_OUT since build system wipes init*.rc + # during ramdisk creation and only allows init.recovery.*.rc files to be copied + # from TARGET_ROOT_OUT thereafter + LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT) + + LOCAL_SRC_FILES := $(LOCAL_MODULE) + + # Add additional .rc files and imports into init.recovery.vold_decrypt.rc + # Note: any init.recovery.vold_decrypt.{service}.rc that are not default + # in crypto/vold_decrypt should be in the device tree + LOCAL_POST_INSTALL_CMD := $(hide) \ + $(foreach item, $(rc_files), \ + sed -i '1iimport \/$(item)' "$(TARGET_ROOT_OUT)/$(LOCAL_MODULE)"; \ + if [ -f "$(LOCAL_PATH)/$(item)" ]; then \ + cp -f "$(LOCAL_PATH)/$(item)" "$(TARGET_ROOT_OUT)"/; \ + fi; \ + ) + include $(BUILD_PREBUILT) + + + include $(CLEAR_VARS) + LOCAL_MODULE := libvolddecrypt + LOCAL_MODULE_TAGS := eng optional + LOCAL_CFLAGS := -Wall + ifeq ($(shell test $(PLATFORM_SDK_VERSION) -lt 23; echo $$?),0) + LOCAL_C_INCLUDES += external/stlport/stlport bionic bionic/libstdc++/include + endif + + ifneq ($(services),) + LOCAL_CFLAGS += -DTW_CRYPTO_SYSTEM_VOLD_SERVICES='"$(services)"' + endif + + ifeq ($(TW_CRYPTO_SYSTEM_VOLD_DEBUG),true) + # Enabling strace will expose the password in the strace logs!! + LOCAL_CFLAGS += -DTW_CRYPTO_SYSTEM_VOLD_DEBUG + endif + + ifeq ($(TW_CRYPTO_SYSTEM_VOLD_DISABLE_TIMEOUT),true) + LOCAL_CFLAGS += -DTW_CRYPTO_SYSTEM_VOLD_DISABLE_TIMEOUT + endif + + LOCAL_SRC_FILES = vold_decrypt.cpp + LOCAL_SHARED_LIBRARIES := libcutils + include $(BUILD_STATIC_LIBRARY) + + endif + endif +endif diff --git a/crypto/vold_decrypt/init.recovery.vold_decrypt.qseecomd.rc b/crypto/vold_decrypt/init.recovery.vold_decrypt.qseecomd.rc new file mode 100755 index 000000000..06bdebcd3 --- /dev/null +++ b/crypto/vold_decrypt/init.recovery.vold_decrypt.qseecomd.rc @@ -0,0 +1,14 @@ +on fs + # needed to make qseecomd work in recovery + chmod 0660 /dev/qseecom + chown system drmrpc /dev/qseecom + chmod 0664 /dev/ion + chown system system /dev/ion + +service sys_qseecomd /system/bin/qseecomd + user root + group root + setenv PATH /system/bin + setenv LD_LIBRARY_PATH /system/lib64:/system/lib + disabled + oneshot diff --git a/crypto/vold_decrypt/init.recovery.vold_decrypt.rc b/crypto/vold_decrypt/init.recovery.vold_decrypt.rc new file mode 100755 index 000000000..65983eb25 --- /dev/null +++ b/crypto/vold_decrypt/init.recovery.vold_decrypt.rc @@ -0,0 +1,10 @@ + +service sys_vold /system/bin/vold \ + --blkid_context=u:r:blkid:s0 --blkid_untrusted_context=u:r:blkid_untrusted:s0 \ + --fsck_context=u:r:fsck:s0 --fsck_untrusted_context=u:r:fsck_untrusted:s0 + socket vold stream 0660 root mount + socket cryptd stream 0660 root mount + setenv PATH /system/bin + setenv LD_LIBRARY_PATH /system/lib64:/system/lib + disabled + oneshot diff --git a/crypto/vold_decrypt/vold_decrypt.cpp b/crypto/vold_decrypt/vold_decrypt.cpp new file mode 100644 index 000000000..c9faf4733 --- /dev/null +++ b/crypto/vold_decrypt/vold_decrypt.cpp @@ -0,0 +1,599 @@ +/* + Copyright 2017 TeamWin + This file is part of TWRP/TeamWin Recovery Project. + + TWRP 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. + + TWRP 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 TWRP. If not, see <http://www.gnu.org/licenses/>. +*/ + + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <sys/time.h> + +#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG +#include <signal.h> +#include <sys/types.h> +#include <sys/wait.h> +#endif + +#include <string> +#include <vector> +#include <sstream> + +#include "../../twcommon.h" +#include "../../partitions.hpp" +#include "../../twrp-functions.hpp" +#include "../../gui/gui.hpp" + +using namespace std; + +extern "C" { + #include <cutils/properties.h> +} + +/* Timeouts as defined by ServiceManager */ + +/* The maximum amount of time to wait for a service to start or stop, + * in micro-seconds (really an approximation) */ +#define SLEEP_MAX_USEC 2000000 /* 2 seconds */ +/* The minimal sleeping interval between checking for the service's state + * when looping for SLEEP_MAX_USEC */ +#define SLEEP_MIN_USEC 200000 /* 200 msec */ + + +#define LOGDECRYPT(...) do { printf(__VA_ARGS__); if (fp_kmsg) { fprintf(fp_kmsg, "[VOLD_DECRYPT]" __VA_ARGS__); fflush(fp_kmsg); } } while (0) +#define LOGDECRYPT_KMSG(...) do { if (fp_kmsg) { fprintf(fp_kmsg, "[VOLD_DECRYPT]" __VA_ARGS__); fflush(fp_kmsg); } } while (0) + +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES +typedef struct { + string service_name; + string twrp_svc_name; + bool is_running; + bool resume; +} AdditionalService; +#endif + +FILE *fp_kmsg = NULL; +bool has_timeout = false; + +#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG +bool has_strace = false; + +pid_t strace_init(void) { + if (!has_strace) + return -1; + + pid_t pid; + switch(pid = fork()) + { + case -1: + LOGDECRYPT_KMSG("forking strace_init failed: %d!\n", errno); + return -1; + case 0: // child + execl("/sbin/strace", "strace", "-q", "-tt", "-ff", "-v", "-y", "-s", "1000", "-o", "/tmp/strace_init.log", "-p", "1" , NULL); + LOGDECRYPT_KMSG("strace_init fork failed: %d!\n", errno); + exit(-1); + default: + LOGDECRYPT_KMSG("Starting strace_init (pid=%d)\n", pid); + return pid; + } +} +#endif + +/* Convert a binary key of specified length into an ascii hex string equivalent, + * without the leading 0x and with null termination + * + * Original code from cryptfs.c + */ +string convert_key_to_hex_ascii(string master_key) { + size_t i; + unsigned char nibble; + string master_key_ascii = ""; + + for (i = 0; i < master_key.size(); ++i) { + nibble = (master_key[i] >> 4) & 0xf; + nibble += nibble > 9 ? 0x57 : 0x30; + master_key_ascii += nibble; + + nibble = master_key[i] & 0xf; + nibble += nibble > 9 ? 0x57 : 0x30; + master_key_ascii += nibble; + } + + return master_key_ascii; +} + +string wait_for_property(string property_name, int utimeout = SLEEP_MAX_USEC, string expected_value = "not_empty") { + char prop_value[PROPERTY_VALUE_MAX]; + + if (expected_value == "not_empty") { + while (utimeout > 0) { + property_get(property_name.c_str(), prop_value, "error"); + if (strcmp(prop_value, "error") != 0) + break; + LOGDECRYPT_KMSG("waiting for %s to get set\n", property_name.c_str()); + utimeout -= SLEEP_MIN_USEC; + usleep(SLEEP_MIN_USEC);; + } + } + else { + while (utimeout > 0) { + property_get(property_name.c_str(), prop_value, "error"); + if (strcmp(prop_value, expected_value.c_str()) == 0) + break; + LOGDECRYPT_KMSG("waiting for %s to change from '%s' to '%s'\n", property_name.c_str(), prop_value, expected_value.c_str()); + utimeout -= SLEEP_MIN_USEC; + usleep(SLEEP_MIN_USEC);; + } + } + property_get(property_name.c_str(), prop_value, "error"); + + return prop_value; +} + +bool Service_Exists(string initrc_svc) { + char prop_value[PROPERTY_VALUE_MAX]; + string init_svc = "init.svc." + initrc_svc; + property_get(init_svc.c_str(), prop_value, "error"); + return (strcmp(prop_value, "error") != 0); +} + +bool Is_Service_Running(string initrc_svc) { + char prop_value[PROPERTY_VALUE_MAX]; + string init_svc = "init.svc." + initrc_svc; + property_get(init_svc.c_str(), prop_value, "error"); + return (strcmp(prop_value, "running") == 0); +} + +bool Is_Service_Stopped(string initrc_svc) { + char prop_value[PROPERTY_VALUE_MAX]; + string init_svc = "init.svc." + initrc_svc; + property_get(init_svc.c_str(), prop_value, "error"); + return (strcmp(prop_value, "stopped") == 0); +} + +bool Start_Service(string initrc_svc, int utimeout = SLEEP_MAX_USEC) { + string res = "error"; + string init_svc = "init.svc." + initrc_svc; + + property_set("ctl.start", initrc_svc.c_str()); + + res = wait_for_property(init_svc, utimeout, "running"); + + LOGDECRYPT("Start service %s: %s.\n", initrc_svc.c_str(), res.c_str()); + + return (res == "running"); +} + +bool Stop_Service(string initrc_svc, int utimeout = SLEEP_MAX_USEC) { + string res = "error"; + + if (Service_Exists(initrc_svc)) { + string init_svc = "init.svc." + initrc_svc; + property_set("ctl.stop", initrc_svc.c_str()); + res = wait_for_property(init_svc, utimeout, "stopped"); + LOGDECRYPT("Stop service %s: %s.\n", initrc_svc.c_str(), res.c_str()); + } + + return (res == "stopped"); +} + +void output_dmesg_to_recoverylog(void) { + TWFunc::Exec_Cmd( + "echo \"---- DMESG LOG FOLLOWS ----\";" + "dmesg | grep 'DECRYPT\\|vold\\|qseecom\\|QSEECOM\\|keymaste\\|keystore\\|cmnlib';" + "echo \"---- DMESG LOG ENDS ----\"" + ); +} + +void set_needed_props(void) { + // vold won't start without ro.storage_structure on Kitkat + string sdkverstr = TWFunc::System_Property_Get("ro.build.version.sdk"); + int sdkver = 20; + if (!sdkverstr.empty()) { + sdkver = atoi(sdkverstr.c_str()); + } + if (sdkver <= 19) { + string ro_storage_structure = TWFunc::System_Property_Get("ro.storage_structure"); + if (!ro_storage_structure.empty()) + property_set("ro.storage_structure", ro_storage_structure.c_str()); + } +} + +string vdc_cryptfs_cmd(string log_name) { + string cmd; + + cmd = "LD_LIBRARY_PATH=/system/lib64:/system/lib /system/bin/vdc cryptfs"; + +#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG + if (has_timeout && has_strace) + cmd = "/sbin/strace -q -tt -ff -v -y -s 1000 -o /tmp/strace_vdc_" + log_name + " /sbin/timeout -t 30 -s KILL env " + cmd; + else if (has_strace) + cmd = "/sbin/strace -q -tt -ff -v -y -s 1000 -o /tmp/strace_vdc_" + log_name + " -E " + cmd; + else +#endif + if (has_timeout) + cmd = "/sbin/timeout -t 30 -s KILL env " + cmd; + + return cmd; +} + +int run_vdc(string Password) { + int res = -1; + struct timeval t1, t2; + string vdc_res; + int vdc_r1, vdc_r2, vdc_r3; + + LOGDECRYPT("About to run vdc...\n"); + + // Wait for vold connection + gettimeofday(&t1, NULL); + t2 = t1; + while ((t2.tv_sec - t1.tv_sec) < 5) { + vdc_res.clear(); + // cryptfs getpwtype returns: R1=213(PasswordTypeResult) R2=? R3="password", "pattern", "pin", "default" + res = TWFunc::Exec_Cmd(vdc_cryptfs_cmd("connect") + " getpwtype", vdc_res); + std::replace(vdc_res.begin(), vdc_res.end(), '\n', ' '); // remove newline(s) + vdc_r1 = vdc_r2 = vdc_r3 = -1; + sscanf(vdc_res.c_str(), "%d", &vdc_r1); + if (vdc_r1 == 213) { + char str_res[sizeof(int) + 1]; + snprintf(str_res, sizeof(str_res), "%d", res); + vdc_res += "ret="; + vdc_res += str_res; + res = 0; + break; + } + LOGDECRYPT("Retrying connection to vold\n"); + usleep(SLEEP_MIN_USEC); // vdc usually usleep(10000), but that causes too many unnecessary attempts + gettimeofday(&t2, NULL); + } + + if (res != 0) + return res; + + LOGDECRYPT("Connected to vold (%s)\n", vdc_res.c_str()); + + // Input password from GUI, or default password + vdc_res.clear(); + res = TWFunc::Exec_Cmd(vdc_cryptfs_cmd("passwd") + " checkpw '" + Password + "'", vdc_res); + std::replace(vdc_res.begin(), vdc_res.end(), '\n', ' '); // remove newline(s) + LOGDECRYPT("vdc cryptfs result (passwd): %s (ret=%d)\n", vdc_res.c_str(), res); + vdc_r1 = vdc_r2 = vdc_r3 = -1; + sscanf(vdc_res.c_str(), "%d %d %d", &vdc_r1, &vdc_r2, &vdc_r3); + + if (vdc_r3 != 0) { + // try falling back to Lollipop hex passwords + string hexPassword = convert_key_to_hex_ascii(Password); + vdc_res.clear(); + res = TWFunc::Exec_Cmd(vdc_cryptfs_cmd("hex_pw") + " checkpw '" + hexPassword + "'", vdc_res); + std::replace(vdc_res.begin(), vdc_res.end(), '\n', ' '); // remove newline(s) + LOGDECRYPT("vdc cryptfs result (hex_pw): %s (ret=%d)\n", vdc_res.c_str(), res); + vdc_r1 = vdc_r2 = vdc_r3 = -1; + sscanf(vdc_res.c_str(), "%d %d %d", &vdc_r1, &vdc_r2, &vdc_r3); + } + + // vdc's return value is dependant upon source origin, it will either + // return 0 or vdc_r1, so disregard and focus on decryption instead + if (vdc_r3 == 0) { + // Decryption successful wait for crypto blk dev + wait_for_property("ro.crypto.fs_crypto_blkdev"); + res = 0; + } else { + res = -1; + } + + return res; +} + +bool Symlink_Vendor_Folder(void) { + bool is_vendor_symlinked = false; + + if (PartitionManager.Is_Mounted_By_Path("/vendor")) { + LOGDECRYPT("vendor partition mounted, skipping /vendor substitution\n"); + } + else if (TWFunc::Path_Exists("/system/vendor")) { + LOGDECRYPT("Symlinking vendor folder...\n"); + if (TWFunc::Path_Exists("/vendor") && rename("/vendor", "/vendor-orig") != 0) { + LOGDECRYPT("Failed to rename original /vendor folder: %s\n", strerror(errno)); + } else { + TWFunc::Recursive_Mkdir("/vendor/firmware/keymaster"); + LOGDECRYPT_KMSG("Symlinking /system/vendor/lib64 to /vendor/lib64 (res=%d)\n", + symlink("/system/vendor/lib64", "/vendor/lib64") + ); + LOGDECRYPT_KMSG("Symlinking /system/vendor/lib to /vendor/lib (res=%d)\n", + symlink("/system/vendor/lib", "/vendor/lib") + ); + is_vendor_symlinked = true; + property_set("vold_decrypt.symlinked_vendor", "1"); + } + } + return is_vendor_symlinked; +} + +void Restore_Vendor_Folder(void) { + property_set("vold_decrypt.symlinked_vendor", "0"); + TWFunc::removeDir("/vendor", false); + rename("/vendor-orig", "/vendor"); +} + +bool Symlink_Firmware_Folder(void) { + bool is_firmware_symlinked = false; + + if (PartitionManager.Is_Mounted_By_Path("/firmware")) { + LOGDECRYPT("firmware partition mounted, skipping /firmware substitution\n"); + } else { + LOGDECRYPT("Symlinking firmware folder...\n"); + if (TWFunc::Path_Exists("/firmware") && rename("/firmware", "/firmware-orig") != 0) { + LOGDECRYPT("Failed to rename original /firmware folder: %s\n", strerror(errno)); + } else { + TWFunc::Recursive_Mkdir("/firmware/image"); + is_firmware_symlinked = true; + property_set("vold_decrypt.symlinked_firmware", "1"); + } + } + return is_firmware_symlinked; +} + +void Restore_Firmware_Folder(void) { + property_set("vold_decrypt.symlinked_firmware", "0"); + TWFunc::removeDir("/firmware", false); + rename("/firmware-orig", "/firmware"); +} + +void Symlink_Firmware_Files(bool is_vendor_symlinked, bool is_firmware_symlinked) { + if (!is_vendor_symlinked && !is_firmware_symlinked) + return; + + LOGDECRYPT("Symlinking firmware files...\n"); + string result_of_find; + TWFunc::Exec_Cmd("find /system -name keymaste*.* -type f -o -name cmnlib.* -type f 2>/dev/null", result_of_find); + + stringstream ss(result_of_find); + string line; + int count = 0; + + while(getline(ss, line)) { + const char *fwfile = line.c_str(); + string base_name = TWFunc::Get_Filename(line); + count++; + + if (is_firmware_symlinked) { + LOGDECRYPT_KMSG("Symlinking %s to /firmware/image/ (res=%d)\n", fwfile, + symlink(fwfile, ("/firmware/image/" + base_name).c_str()) + ); + } + + if (is_vendor_symlinked) { + LOGDECRYPT_KMSG("Symlinking %s to /vendor/firmware/ (res=%d)\n", fwfile, + symlink(fwfile, ("/vendor/firmware/" + base_name).c_str()) + ); + + LOGDECRYPT_KMSG("Symlinking %s to /vendor/firmware/keymaster/ (res=%d)\n", fwfile, + symlink(fwfile, ("/vendor/firmware/keymaster/" + base_name).c_str()) + ); + } + } + LOGDECRYPT("%d file(s) symlinked.\n", count); +} + +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES +vector<AdditionalService> Get_List_Of_Additional_Services (void) { + vector<AdditionalService> services; + + vector<string> service_names = TWFunc::Split_String(TW_CRYPTO_SYSTEM_VOLD_SERVICES, " "); + + for (size_t i = 0; i < service_names.size(); ++i) { + AdditionalService svc; + svc.service_name = service_names[i]; + services.push_back(svc); + } + + return services; +} +#endif + +int vold_decrypt(string Password) +{ + int res; + bool output_dmesg_to_log = false; + bool is_vendor_symlinked = false; + bool is_firmware_symlinked = false; + bool is_vold_running = false; + + if (Password.empty()) { + LOGDECRYPT("vold_decrypt: password is empty!\n"); + return -1; + } + + // Mount system and check for vold and vdc + if (!PartitionManager.Mount_By_Path("/system", true)) { + return -1; + } else if (!TWFunc::Path_Exists("/system/bin/vold")) { + LOGDECRYPT("ERROR: /system/bin/vold not found, aborting.\n"); + gui_msg(Msg(msg::kError, "decrypt_data_vold_os_missing=Missing files needed for vold decrypt: {1}")("/system/bin/vold")); + return -1; + } else if (!TWFunc::Path_Exists("/system/bin/vdc")) { + LOGDECRYPT("ERROR: /system/bin/vdc not found, aborting.\n"); + gui_msg(Msg(msg::kError, "decrypt_data_vold_os_missing=Missing files needed for vold decrypt: {1}")("/system/bin/vdc")); + return -1; + } + + fp_kmsg = fopen("/dev/kmsg", "a"); + + LOGDECRYPT("TW_CRYPTO_USE_SYSTEM_VOLD := true\n"); + LOGDECRYPT("Attempting to use system's vold for decryption...\n"); + +#ifndef TW_CRYPTO_SYSTEM_VOLD_DISABLE_TIMEOUT + has_timeout = TWFunc::Path_Exists("/sbin/timeout"); + if (!has_timeout) + LOGDECRYPT("timeout binary not found, disabling timeout in vold_decrypt!\n"); +#endif + +#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG + has_strace = TWFunc::Path_Exists("/sbin/strace"); + if (!has_strace) + LOGDECRYPT("strace binary not found, disabling strace in vold_decrypt!\n"); + pid_t pid_strace = strace_init(); +#endif + +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES + vector<AdditionalService> Services = Get_List_Of_Additional_Services(); + + // Check if TWRP is running any of the services + for (size_t i = 0; i < Services.size(); ++i) { + if (Service_Exists(Services[i].service_name)) + Services[i].twrp_svc_name = Services[i].service_name; + else if (Service_Exists("sbin" + Services[i].service_name)) + Services[i].twrp_svc_name = "sbin" + Services[i].service_name; + else + Services[i].twrp_svc_name.clear(); + + if (!Services[i].twrp_svc_name.empty() && !Is_Service_Stopped(Services[i].twrp_svc_name)) { + Services[i].resume = true; + Stop_Service(Services[i].twrp_svc_name); + } else + Services[i].resume = false; + + // vold_decrypt system services have to be named sys_{service} in the .rc files + Services[i].service_name = "sys_" + Services[i].service_name; + } +#endif + + LOGDECRYPT("Setting up folders and permissions...\n"); + is_vendor_symlinked = Symlink_Vendor_Folder(); + is_firmware_symlinked = Symlink_Firmware_Folder(); + Symlink_Firmware_Files(is_vendor_symlinked, is_firmware_symlinked); + + set_needed_props(); + + // Start services needed for vold decrypt + LOGDECRYPT("Starting services...\n"); +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES + for (size_t i = 0; i < Services.size(); ++i) { + Services[i].is_running = Start_Service(Services[i].service_name); + } +#endif + is_vold_running = Start_Service("sys_vold"); + + if (is_vold_running) { + +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES + for (size_t i = 0; i < Services.size(); ++i) { + if (!Is_Service_Running(Services[i].service_name) && Services[i].resume) { + // if system_service has died restart the twrp_service + LOGDECRYPT("%s is not running, resuming %s!\n", Services[i].service_name.c_str(), Services[i].twrp_svc_name.c_str()); + Start_Service(Services[i].twrp_svc_name); + } + } +#endif + + res = run_vdc(Password); + + if (res != 0) { + // Decryption was unsuccessful + LOGDECRYPT("Decryption failed\n"); + output_dmesg_to_log = true; + } + } else { + LOGDECRYPT("Failed to start vold\n"); + TWFunc::Exec_Cmd("echo \"$(getprop | grep init.svc)\" >> /dev/kmsg"); + output_dmesg_to_log = true; + } + + // Stop services needed for vold decrypt so /system can be unmounted + LOGDECRYPT("Stopping services...\n"); + Stop_Service("sys_vold"); +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES + for (size_t i = 0; i < Services.size(); ++i) { + if (!Is_Service_Running(Services[i].service_name) && Services[i].resume) + Stop_Service(Services[i].twrp_svc_name); + else + Stop_Service(Services[i].service_name); + } +#endif + + if (is_firmware_symlinked) + Restore_Firmware_Folder(); + if (is_vendor_symlinked) + Restore_Vendor_Folder(); + + if (!PartitionManager.UnMount_By_Path("/system", true)) { + // PartitionManager failed to unmount /system, this should not happen, + // but in case it does, do a lazy unmount + LOGDECRYPT("WARNING: system could not be unmounted normally!\n"); + TWFunc::Exec_Cmd("umount -l /system"); + } + + LOGDECRYPT("Finished.\n"); + +#ifdef TW_CRYPTO_SYSTEM_VOLD_SERVICES + // Restart previously running services + for (size_t i = 0; i < Services.size(); ++i) { + if (Services[i].resume) + Start_Service(Services[i].twrp_svc_name); + } +#endif + +#ifdef TW_CRYPTO_SYSTEM_VOLD_DEBUG + if (pid_strace > 0) { + LOGDECRYPT_KMSG("Stopping strace_init (pid=%d)\n", pid_strace); + int died = 0; + int timeout; + int status; + pid_t retpid = waitpid(pid_strace, &status, WNOHANG); + + kill(pid_strace, SIGTERM); + for (timeout = 5; retpid == 0 && timeout; --timeout) { + sleep(1); + retpid = waitpid(pid_strace, &status, WNOHANG); + } + if (retpid) + LOGDECRYPT_KMSG("strace_init terminated successfully\n"); + else { + // SIGTERM didn't work, kill it instead + kill(pid_strace, SIGKILL); + for (timeout = 5; retpid == 0 && timeout; --timeout) { + sleep(1); + retpid = waitpid(pid_strace, &status, WNOHANG); + } + if (retpid) + LOGDECRYPT_KMSG("strace_init killed successfully\n"); + else + LOGDECRYPT_KMSG("strace_init took too long to kill, may be a zombie process\n"); + } + } + output_dmesg_to_log = true; +#endif + + // Finish up and exit + if (fp_kmsg) { + fflush(fp_kmsg); + fclose(fp_kmsg); + } + + if (output_dmesg_to_log) + output_dmesg_to_recoverylog(); + + // Finally check if crypto device is up + if (wait_for_property("ro.crypto.fs_crypto_blkdev", 0) != "error") + res = 0; + else + res = -1; + + return res; +} diff --git a/crypto/vold_decrypt/vold_decrypt.h b/crypto/vold_decrypt/vold_decrypt.h new file mode 100644 index 000000000..70db404e9 --- /dev/null +++ b/crypto/vold_decrypt/vold_decrypt.h @@ -0,0 +1,26 @@ +/* + Copyright 2017 TeamWin + This file is part of TWRP/TeamWin Recovery Project. + + TWRP 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. + + TWRP 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 TWRP. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _VOLD_DECRYPT_H +#define _VOLD_DECRYPT_H + +#include <string> + +int vold_decrypt(std::string Password); + +#endif // _VOLD_DECRYPT_H |