#!/usr/bin/python # Copyright (c) 2017-2021 Arm Limited # # SPDX-License-Identifier: Apache-2.0 # # 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. import os from os.path import abspath, basename, dirname, splitext, isdir from os.path import join as path_join import re import subprocess import shutil from intelhex import IntelHex SCRIPT_DIR = dirname(abspath(__file__)) MBED_OS_ROOT = abspath(path_join(SCRIPT_DIR, os.pardir, os.pardir)) def m2354_tfm_bin(t_self, non_secure_image, secure_bin): assert os.path.isfile(secure_bin) assert os.path.isfile(non_secure_image) secure_bin = abspath(secure_bin) non_secure_image = abspath(non_secure_image) SECURE_ROOT = abspath(dirname(secure_bin)) build_dir = dirname(non_secure_image) tempdir = path_join(build_dir, 'temp') if not isdir(tempdir): os.makedirs(tempdir) flash_layout = path_join(SECURE_ROOT, 'partition', 'flash_layout.h') bl2_bin = path_join(SECURE_ROOT, 'bl2.bin') image_macros_s_ns = path_join(SECURE_ROOT, 'partition', 'signing_layout_preprocessed.h') ns_bin_basename, output_ext = splitext(basename(non_secure_image)) concatenated_bin = abspath(path_join(tempdir, 'tfm_' + ns_bin_basename + ".bin")) signed_bin = abspath(path_join(tempdir, 'tfm_' + ns_bin_basename + '_signed' + ".bin")) signed_nopad_bin = abspath(path_join(tempdir, 'tfm_' + ns_bin_basename + '_signed_nopad' + ".bin")) # Convert NS image to BIN format if it is HEX if output_ext == ".hex": non_secure_bin = abspath(path_join(tempdir, ns_bin_basename + ".bin")) ns_ih = IntelHex(non_secure_image) ns_ih.tobinfile(non_secure_bin) else: non_secure_bin = non_secure_image assert os.path.isfile(image_macros_s_ns) signing_key = path_join(SCRIPT_DIR, 'nuvoton_m2354-root-rsa-3072.pem') assert os.path.isfile(signing_key) # Find Python 3 command name across platforms python3_cmd = "python3" if shutil.which("python3") is not None else "python" #1. Concatenate secure TFM and non-secure mbed binaries cmd = [ python3_cmd, path_join(MBED_OS_ROOT, "tools", "psa","tfm", "bin_utils","assemble.py"), "--layout", image_macros_s_ns, "-s", secure_bin, "-n", non_secure_bin, "-o", concatenated_bin, ] retcode = run_cmd(cmd, MBED_OS_ROOT) if retcode: raise Exception("Unable to concatenate " + "TF-M Secure/Mbed Non-secure" + " binaries, Error code: " + str(retcode)) return #2.1 Run wrapper to sign the concatenated binary with padding ("--pad"), so upgradeable by mcuboot cmd = [ python3_cmd, path_join(MBED_OS_ROOT, "tools", "psa", "tfm", "bin_utils", "wrapper.py"), "-v", '1.2.0', "-k", signing_key, "--layout", image_macros_s_ns, "--public-key-format", 'full', "--align", '1', "--pad", "--pad-header", "-H", '0x400', "--overwrite-only", "-s", 'auto', "-d", '(0,0.0.0+0)', concatenated_bin, signed_bin, ] retcode = run_cmd(cmd, MBED_OS_ROOT) if retcode: raise Exception("Unable to sign " + "concatenated" + " binary, Error code: " + str(retcode)) return #2.2. Re-run above but without padding ("--pad"), so non-upgradeable by mcuboot cmd.remove("--pad") cmd.pop() cmd.append(signed_nopad_bin) retcode = run_cmd(cmd, MBED_OS_ROOT) if retcode: raise Exception("Unable to sign " + "concatenated" + " binary, Error code: " + str(retcode)) return #3. Concatenate mcuboot and signed binary and overwrite mbed built bin/hex file flash_area_0_offset = find_flash_area_0_offset(flash_layout) out_ih = IntelHex() out_ih.loadbin(bl2_bin) out_ih.loadbin(signed_nopad_bin, flash_area_0_offset) out_ih.tofile(non_secure_image, 'hex' if output_ext == ".hex" else "bin") def find_flash_area_0_offset(configFile): # Compiled regular expressions flash_area_bl2_offset_re = re.compile(r"^#define\s+FLASH_AREA_BL2_OFFSET\s+\({0,1}(0x[0-9a-fA-F]+)\){0,1}") flash_area_bl2_size_re = re.compile(r"^#define\s+FLASH_AREA_BL2_SIZE\s+\({0,1}(0x[0-9a-fA-F]+)\){0,1}") rsvd_stor_size_re = re.compile(r"^#define\s+FLASH_AREA_0_OFFSET\s+\(FLASH_AREA_BL2_OFFSET\s+\+\s+FLASH_AREA_BL2_SIZE\s+\+\s+\({0,1}(0x[0-9a-fA-F]+)\){0,1}\)") # Match values flash_area_bl2_offset = None flash_area_bl2_size = None rsvd_stor_size = None flash_area_0_offset = None with open(configFile, 'r') as configFile_: for line in configFile_: # Seek "#define FLASH_AREA_BL2_OFFSET..." if flash_area_bl2_offset is None: m = flash_area_bl2_offset_re.match(line) if m is not None: flash_area_bl2_offset = int(m.group(1), 0) continue # Seek "#define FLASH_AREA_BL2_SIZE..." if flash_area_bl2_size is None: m = flash_area_bl2_size_re.match(line) if m is not None: flash_area_bl2_size = int(m.group(1), 0) continue # Seek "#define FLASH_AREA_0_OFFSET..." if rsvd_stor_size is None: m = rsvd_stor_size_re.match(line) if m is not None: rsvd_stor_size = int(m.group(1), 0) continue # FLASH_AREA_0_OFFSET = FLASH_AREA_BL2_OFFSET + FLASH_AREA_BL2_SIZE + Reserved storage area size if flash_area_bl2_offset is not None and \ flash_area_bl2_size is not None and \ rsvd_stor_size is not None: flash_area_0_offset = flash_area_bl2_offset + flash_area_bl2_size + rsvd_stor_size break return flash_area_0_offset def run_cmd(cmd, directory): # Redirect stdout/stderr to pipe, text mode POPEN_INSTANCE = subprocess.Popen( cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=directory, universal_newlines=True ) # Command line print("COMMAND: {}".format(POPEN_INSTANCE.args)) stdout_data, stderr_data = POPEN_INSTANCE.communicate() # stdout/stderr messages if (stdout_data): print(stdout_data) if (stderr_data): print(stderr_data) # Return code return POPEN_INSTANCE.returncode