--- /dev/null
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <cryptfs_hw.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <dlfcn.h>
+#include "cutils/log.h"
+#include "cutils/properties.h"
+#include "cutils/android_reboot.h"
+#include "keymaster_common.h"
+#include "hardware.h"
+
+#if defined(__LP64__)
+#define QSEECOM_LIBRARY_PATH "/vendor/lib64/libQSEEComAPI.so"
+#else
+#define QSEECOM_LIBRARY_PATH "/vendor/lib/libQSEEComAPI.so"
+#endif
+
+
+// When device comes up or when user tries to change the password, user can
+// try wrong password upto a certain number of times. If user enters wrong
+// password further, HW would wipe all disk encryption related crypto data
+// and would return an error ERR_MAX_PASSWORD_ATTEMPTS to VOLD. VOLD would
+// wipe userdata partition once this error is received.
+#define ERR_MAX_PASSWORD_ATTEMPTS -10
+#define QSEECOM_DISK_ENCRYPTION 1
+#define QSEECOM_UFS_ICE_DISK_ENCRYPTION 3
+#define QSEECOM_SDCC_ICE_DISK_ENCRYPTION 4
+#define MAX_PASSWORD_LEN 32
+#define QCOM_ICE_STORAGE_UFS 1
+#define QCOM_ICE_STORAGE_SDCC 2
+
+/* Operations that be performed on HW based device encryption key */
+#define SET_HW_DISK_ENC_KEY 1
+#define UPDATE_HW_DISK_ENC_KEY 2
+
+#define QSEECOM_UP_CHECK_COUNT 10
+
+static int loaded_library = 0;
+static int (*qseecom_create_key)(int, void*);
+static int (*qseecom_update_key)(int, void*, void*);
+static int (*qseecom_wipe_key)(int);
+
+inline void* secure_memset(void* v, int c , size_t n) {
+ volatile unsigned char* p = (volatile unsigned char* )v;
+ while (n--) *p++ = c;
+ return v;
+}
+
+
+static int map_usage(int usage)
+{
+ int storage_type = is_ice_enabled();
+ if (usage == QSEECOM_DISK_ENCRYPTION) {
+ if (storage_type == QCOM_ICE_STORAGE_UFS) {
+ return QSEECOM_UFS_ICE_DISK_ENCRYPTION;
+ }
+ else if (storage_type == QCOM_ICE_STORAGE_SDCC) {
+ return QSEECOM_SDCC_ICE_DISK_ENCRYPTION ;
+ }
+ }
+ return usage;
+}
+
+static unsigned char* get_tmp_passwd(const char* passwd)
+{
+ int passwd_len = 0;
+ unsigned char * tmp_passwd = NULL;
+ if(passwd) {
+ tmp_passwd = (unsigned char*)malloc(MAX_PASSWORD_LEN);
+ if(tmp_passwd) {
+ memset(tmp_passwd, 0, MAX_PASSWORD_LEN);
+ passwd_len = strnlen(passwd, MAX_PASSWORD_LEN);
+ memcpy(tmp_passwd, passwd, passwd_len);
+ } else {
+ SLOGE("%s: Failed to allocate memory for tmp passwd \n", __func__);
+ }
+ } else {
+ SLOGE("%s: Passed argument is NULL \n", __func__);
+ }
+ return tmp_passwd;
+}
+
+static int is_qseecom_up()
+{
+ int i = 0;
+ char value[PROPERTY_VALUE_MAX] = {0};
+
+ for (; i<QSEECOM_UP_CHECK_COUNT; i++) {
+ property_get("sys.keymaster.loaded", value, "");
+ if (!strncmp(value, "true", PROPERTY_VALUE_MAX))
+ return 1;
+ usleep(100000);
+ }
+ return 0;
+}
+
+
+static int load_qseecom_library()
+{
+ const char *error = NULL;
+ if (loaded_library)
+ return loaded_library;
+
+ if (!is_qseecom_up()) {
+ SLOGE("Timed out waiting for QSEECom listeners..aborting FDE key operation");
+ return 0;
+ }
+
+ void * handle = dlopen(QSEECOM_LIBRARY_PATH, RTLD_NOW);
+ if(handle) {
+ dlerror(); /* Clear any existing error */
+ *(void **) (&qseecom_create_key) = dlsym(handle,"QSEECom_create_key");
+
+ if((error = dlerror()) == NULL) {
+ SLOGD("Success loading QSEECom_create_key \n");
+ *(void **) (&qseecom_update_key) = dlsym(handle,"QSEECom_update_key_user_info");
+ if ((error = dlerror()) == NULL) {
+ SLOGD("Success loading QSEECom_update_key_user_info\n");
+ *(void **) (&qseecom_wipe_key) = dlsym(handle,"QSEECom_wipe_key");
+ if ((error = dlerror()) == NULL) {
+ loaded_library = 1;
+ SLOGD("Success loading QSEECom_wipe_key \n");
+ }
+ else
+ SLOGE("Error %s loading symbols for QSEECom APIs \n", error);
+ }
+ else
+ SLOGE("Error %s loading symbols for QSEECom APIs \n", error);
+ }
+ } else {
+ SLOGE("Could not load libQSEEComAPI.so \n");
+ }
+
+ if(error)
+ dlclose(handle);
+
+ return loaded_library;
+}
+
+/*
+ * For NON-ICE targets, it would return 0 on success. On ICE based targets,
+ * it would return key index in the ICE Key LUT
+ */
+static int set_key(const char* currentpasswd, const char* passwd, const char* enc_mode, int operation)
+{
+ int err = -1;
+ if (is_hw_disk_encryption(enc_mode) && load_qseecom_library()) {
+ unsigned char* tmp_passwd = get_tmp_passwd(passwd);
+ unsigned char* tmp_currentpasswd = get_tmp_passwd(currentpasswd);
+ if(tmp_passwd) {
+ if (operation == UPDATE_HW_DISK_ENC_KEY) {
+ if (tmp_currentpasswd) {
+ err = qseecom_update_key(map_usage(QSEECOM_DISK_ENCRYPTION), tmp_currentpasswd, tmp_passwd);
+ secure_memset(tmp_currentpasswd, 0, MAX_PASSWORD_LEN);
+ }
+ } else if (operation == SET_HW_DISK_ENC_KEY) {
+ err = qseecom_create_key(map_usage(QSEECOM_DISK_ENCRYPTION), tmp_passwd);
+ }
+ if(err < 0) {
+ if(ERR_MAX_PASSWORD_ATTEMPTS == err)
+ SLOGI("Maximum wrong password attempts reached, will erase userdata\n");
+ }
+ secure_memset(tmp_passwd, 0, MAX_PASSWORD_LEN);
+ free(tmp_passwd);
+ free(tmp_currentpasswd);
+ }
+ }
+ return err;
+}
+
+int set_hw_device_encryption_key(const char* passwd, const char* enc_mode)
+{
+ return set_key(NULL, passwd, enc_mode, SET_HW_DISK_ENC_KEY);
+}
+
+int update_hw_device_encryption_key(const char* oldpw, const char* newpw, const char* enc_mode)
+{
+ return set_key(oldpw, newpw, enc_mode, UPDATE_HW_DISK_ENC_KEY);
+}
+
+unsigned int is_hw_disk_encryption(const char* encryption_mode)
+{
+ int ret = 0;
+ if(encryption_mode) {
+ if (!strcmp(encryption_mode, "aes-xts")) {
+ SLOGD("HW based disk encryption is enabled \n");
+ ret = 1;
+ }
+ }
+ return ret;
+}
+
+unsigned int is_hw_fde_enabled(void)
+{
+ return 1;
+}
+
+int is_ice_enabled(void)
+{
+ char prop_storage[PATH_MAX];
+ int storage_type = 0;
+ int fd;
+
+ if (property_get("ro.boot.bootdevice", prop_storage, "")) {
+ if (strstr(prop_storage, "ufs")) {
+ /* All UFS based devices has ICE in it. So we dont need
+ * to check if corresponding device exists or not
+ */
+ storage_type = QCOM_ICE_STORAGE_UFS;
+ } else if (strstr(prop_storage, "sdhc")) {
+ if (access("/dev/icesdcc", F_OK) != -1)
+ storage_type = QCOM_ICE_STORAGE_SDCC;
+ }
+ }
+ return storage_type;
+}
+
+int clear_hw_device_encryption_key()
+{
+ if (load_qseecom_library())
+ return qseecom_wipe_key(map_usage(QSEECOM_DISK_ENCRYPTION));
+
+ return 0;
+}
+
+static int get_keymaster_version()
+{
+ int rc = -1;
+ const hw_module_t* mod;
+ rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod);
+ if (rc) {
+ SLOGE("could not find any keystore module");
+ return rc;
+ }
+
+ return mod->module_api_version;
+}
+
+int should_use_keymaster()
+{
+ /* HW FDE key would be tied to keymaster only if:
+ * New Keymaster is available
+ * keymaster partition exists on the device
+ */
+ int rc = 0;
+ if (get_keymaster_version() != KEYMASTER_MODULE_API_VERSION_1_0) {
+ SLOGI("Keymaster version is not 1.0");
+ return rc;
+ }
+
+ return 1;
+}
--- /dev/null
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __CRYPTFS_HW_H_
+#define __CRYPTFS_HW_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int set_hw_device_encryption_key(const char*, const char*);
+int update_hw_device_encryption_key(const char*, const char*, const char*);
+int clear_hw_device_encryption_key();
+unsigned int is_hw_disk_encryption(const char*);
+unsigned int is_hw_fde_enabled(void);
+int is_ice_enabled(void);
+int should_use_keymaster();
+
+#ifdef __cplusplus
+}
+#endif
+#endif
projects / GitHub / moto-9609 / twrp_device_motorola_troika.git / commitdiff