#include <cryptfs_hw.h>
#include <stdlib.h>
+#include <string.h>
#include <sys/limits.h>
#include <sys/types.h>
#include <sys/stat.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
// wipe userdata partition once this error is received.
#define ERR_MAX_PASSWORD_ATTEMPTS -10
#define QSEECOM_DISK_ENCRYPTION 1
-#define QSEECOM_ICE_DISK_ENCRYPTION 3
+#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 unsigned char current_passwd[MAX_PASSWORD_LEN];
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)
{
- return (is_ice_enabled() && (usage == QSEECOM_DISK_ENCRYPTION)) ?
- QSEECOM_ICE_DISK_ENCRYPTION : 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;
tmp_passwd = (unsigned char*)malloc(MAX_PASSWORD_LEN);
if(tmp_passwd) {
memset(tmp_passwd, 0, MAX_PASSWORD_LEN);
- passwd_len = (strlen(passwd) > MAX_PASSWORD_LEN) ? MAX_PASSWORD_LEN : strlen(passwd);
+ 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__);
return tmp_passwd;
}
-static void wipe_userdata()
+static int is_qseecom_up()
{
- mkdir("/cache/recovery", 0700);
- int fd = open("/cache/recovery/command", O_RDWR|O_CREAT|O_TRUNC|O_NOFOLLOW, 0600);
- if (fd >= 0) {
- write(fd, "--wipe_data", strlen("--wipe_data") + 1);
- close(fd);
- } else {
- SLOGE("could not open /cache/recovery/command\n");
+ 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);
}
- android_reboot(ANDROID_RB_RESTART2, 0, "recovery");
+ return 0;
}
+
static int load_qseecom_library()
{
const char *error = NULL;
if (loaded_library)
return loaded_library;
- void * handle = dlopen("/vendor/lib/libQSEEComAPI.so", RTLD_NOW);
+ 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");
* 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* passwd, const char* enc_mode, int operation)
+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)
- err = qseecom_update_key(map_usage(QSEECOM_DISK_ENCRYPTION), current_passwd, tmp_passwd);
- else if (operation == SET_HW_DISK_ENC_KEY)
+ 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) {
- memset(current_passwd, 0, MAX_PASSWORD_LEN);
- memcpy(current_passwd, tmp_passwd, MAX_PASSWORD_LEN);
- } else {
+ }
+ if(err < 0) {
if(ERR_MAX_PASSWORD_ATTEMPTS == err)
- wipe_userdata();
+ 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(passwd, enc_mode, SET_HW_DISK_ENC_KEY);
+ return set_key(NULL, passwd, enc_mode, SET_HW_DISK_ENC_KEY);
}
-int update_hw_device_encryption_key(const char* newpw, const char* enc_mode)
+int update_hw_device_encryption_key(const char* oldpw, const char* newpw, const char* enc_mode)
{
-
- return set_key(newpw, enc_mode, UPDATE_HW_DISK_ENC_KEY);
+ return set_key(oldpw, newpw, enc_mode, UPDATE_HW_DISK_ENC_KEY);
}
unsigned int is_hw_disk_encryption(const char* encryption_mode)
int is_ice_enabled(void)
{
- /* If (USE_ICE_FLAG) => return 1
- * if (property set to use gpce) return 0
- * we are using property to test UFS + GPCE, even though not required
- * if (storage is ufs) return 1
- * else return 0 so that emmc based device can work properly
- */
-#ifdef USE_ICE_FOR_STORAGE_ENCRYPTION
- SLOGD("Ice enabled = true");
- return 1;
-#else
- char enc_hw_type[PATH_MAX];
- char prop_storage[PATH_MAX];
- int ice = 0;
- int i;
- if (property_get("crypto.fde_enc_hw_type", enc_hw_type, "")) {
- if(!strncmp(enc_hw_type, "gpce", PROPERTY_VALUE_MAX)) {
- SLOGD("GPCE would be used for HW FDE");
- return 0;
- }
- }
+ char prop_storage[PATH_MAX];
+ int storage_type = 0;
+ int fd;
- if (property_get("ro.boot.bootdevice", prop_storage, "")) {
- if(strstr(prop_storage, "ufs")) {
- SLOGD("ICE would be used for HW FDE");
- return 1;
- }
+ 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;
}
- SLOGD("GPCE would be used for HW FDE");
- return 0;
-#endif
+ }
+ return storage_type;
}
-int wipe_hw_device_encryption_key(const char* enc_mode)
+int clear_hw_device_encryption_key()
{
- if (!enc_mode)
- return -1;
-
- if (is_hw_disk_encryption(enc_mode) && load_qseecom_library())
+ if (load_qseecom_library())
return qseecom_wipe_key(map_usage(QSEECOM_DISK_ENCRYPTION));
return 0;
-}
\ No newline at end of file
+}
+
+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;
+}
projects / GitHub / moto-9609 / twrp_device_motorola_troika.git / commitdiff