#!/usr/bin/python # # Copyright (c) 2016, NORDUnet A/S 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 NORDUnet 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS # IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT # HOLDER 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. """ Utility to transfer a new firmware to the bootloader. Example usage: ./bin/dfu path/to/firmware.bin Then reset the Cryptech Alpha board. """ import os import sys import time import struct import serial import argparse from binascii import crc32 CHUNK_SIZE = 4096 def parse_args(): """ Parse the command line arguments """ parser = argparse.ArgumentParser(description = "Device firmware upgrader", add_help = True, formatter_class = argparse.ArgumentDefaultsHelpFormatter, ) parser.add_argument('--verbose', dest='verbose', action='store_true', default=False, help='Verbose operation', ) parser.add_argument('--device', dest='device', default='/dev/ttyUSB0', help='Name of management port USB serial device', ) # positional argument(s) parser.add_argument('filename') return parser.parse_args() def _write(dst, data): for i in range(len(data)): dst.write(data[i]) time.sleep(0.1) if len(data) == 4: print("Wrote 0x{:02x}{:02x}{:02x}{:02x}".format(ord(data[0]), ord(data[1]), ord(data[2]), ord(data[3]))) else: print("Wrote {!r}".format(data)) def _read(dst, verbose=False): res = '' while True: x = dst.read(1) if not x: break res += x if res and verbose: print ("Read {!r}".format(res)) return res def send_file(filename, args): s = os.stat(filename) size = s.st_size src = open(filename, 'rb') chunk_size = CHUNK_SIZE print("Waiting for contact with the bootloader on device {!s}, reset the CrypTech Alpha...".format(args.device)) while True: try: dst = serial.Serial(args.device, 921600, timeout=0.1) except serial.SerialException: time.sleep(0.2) continue dst.write('\r') response = _read(dst, args.verbose) if 'OK' in response: dst.timeout=2 break print('\nUploading firmware\n') crc = 0 counter = 0 # 1. Write size of file (4 bytes) _write(dst, struct.pack('77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162