UREE toy

Makefile

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES := \
  uree_toy.c
LOCAL_C_INCLUDE := ${ANDROID_NDK_ROOT}/platforms/android-14/arch-arm/usr/include/

LOCAL_MODULE := uree_toy
LOCAL_MODULE_TAGS := optional

# Allow execution on android-16                                                                                                                                                              
LOCAL_CFLAGS += -pie -fPIE
LOCAL_LDFLAGS += -pie -fPIE

APP_ABI := armeabi armeabi-v7a x86

include $(BUILD_STATIC_EXECUTABLE)

include $(BUILD_EXECUTABLE)

include $(call all-makefiles-under,$(LOCAL_PATH))

uree_toy.c

/*
 * Tim 'diff' Strazzere
 *   <strazz@gmail.com>
 */

#include <stdlib.h> // avoid exit warning
#include <stdio.h>

#include <dlfcn.h>  // dlopen/dlclose
#include <unistd.h> // access

#define ALMOND_LIB "/system/lib/libtz_uree.so"

#define TZ_TA_DBG_UUID   "42a10730-f349-11e2-a99a-d4856458b228"

#define TZ_RESULT_SUCCESS 0x00000000

typedef unsigned int UREE_SESSION_HANDLE;
typedef int TZ_RESULT;

typedef TZ_RESULT (*UREE_CreateSession)(char*, UREE_SESSION_HANDLE*);
typedef char* (*TZ_GetErrorString)(int);
static UREE_SESSION_HANDLE dbg_session;

int main(int argc, const char* argv[]) {

  printf(" [+] Attempting to load UREE Trustzone library\n");
  void* handle = dlopen(ALMOND_LIB, RTLD_LAZY);

  if(handle == NULL) {
    printf(" [!] Could not load library : %s\n", dlerror());
    return -1;
  }
  printf(" [+] Library Loaded!\n");

  UREE_CreateSession createSession = dlsym(handle, "UREE_CreateSession");
  if(createSession == NULL) {
    printf(" [!] Function not found!\n");
    return -1;
  }

  TZ_RESULT ret = createSession(TZ_TA_DBG_UUID, &dbg_session);  

  TZ_GetErrorString getErrorString = dlsym(handle, "TZ_GetErrorString");

  if(ret != TZ_RESULT_SUCCESS) {
    printf("CreateSession TZ_TA_DBG_UUID Error: %s\n", getErrorString(ret));
    return -1;
  }

  printf(" [+] Closing library\n");
  dlclose(handle);

  return 0;
}