diff options
| -rwxr-xr-x | projects/hsm/cryptech_probe | 129 | ||||
| -rwxr-xr-x | projects/hsm/cryptech_upload | 4 |
2 files changed, 132 insertions, 1 deletions
diff --git a/projects/hsm/cryptech_probe b/projects/hsm/cryptech_probe new file mode 100755 index 0000000..16a2a8f --- /dev/null +++ b/projects/hsm/cryptech_probe @@ -0,0 +1,129 @@ +#!/usr/bin/env 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 probe USB serial port(s) trying to figure out which one(s) +we have plugged in today. +""" + +import sys +import time +import argparse +import serial.tools.list_ports_posix + +parser = argparse.ArgumentParser(formatter_class = argparse.ArgumentDefaultsHelpFormatter) +parser.add_argument("-v", "--verbose", action = "store_true", help = "blather about what we're doing") +args = parser.parse_args() + +SLIP_END = chr(0300) # Indicates end of SLIP packet +SLIP_ESC = chr(0333) # Indicates byte stuffing +SLIP_ESC_END = chr(0334) # ESC ESC_END means END data byte +SLIP_ESC_ESC = chr(0335) # ESC ESC_ESC means ESC data byte + +Control_U = chr(0025) # Console: clear line +Control_M = chr(0015) # Console: end of line + +RPC_query = chr(0) * 8 # client_handle = 0, function code = RPC_FUNC_GET_VERSION +RPC_reply = chr(0) * 12 # opcode = RPC_FUNC_GET_VERSION, client_handle = 0, valret = HAL_OK + +# This is the query string we send to each USB port we find. It's +# intended to be relatively harmless, at least for either of the HSM +# ports: the final Control-U should prevent the console from trying to +# interpret the RPC command, and the SLIP_END markers should cause +# the RPC server to treat the ASCII control characters as noise. +# +# Yes, this is a total kludge. Useful identifiers for the USB ports +# are are on the wish list for a future revision of the hardware, but +# for the moment, we do what we can with what we have. + +probe_string = SLIP_END + Control_U + SLIP_END + RPC_query + SLIP_END + Control_U + Control_M + +def looks_like_console(response): + # Check whether we got a known console prompt. + return any(prompt in response for prompt in ("Username:", "Password:", "cryptech>")) + + +def looks_like_rpc(response): + # Check whether we got something that looks like the response to an RPC version query. + # We skip over the version value itself, as it might change, but we check that it's + # terminated properly. This is fragile, and will need to handle SLIP decoding if + # we ever bump one of the version fields up into the range where the SLIP control + # characters live, but it will do for the moment. + try: + return response[response.index(SLIP_END + RPC_reply) + len(SLIP_END + RPC_reply) + 4] == SLIP_END + except ValueError: + return False + except IndexError: + return False + + +rpc_hints = None + +ports = dict((port, None) + for port, desc, hwid in serial.tools.list_ports_posix.comports() + if "VID:PID=0403:6014" in hwid) + +if not ports: + sys.exit("Couldn't find any likely USB ports") + +if args.verbose: + print "Candidate USB ports:", ", ".join(ports) + +for port in ports: + while True: + try: + ports[port] = serial.Serial(port, 921600, timeout=0.1) + break + except serial.SerialException: + time.sleep(0.2) + +for port in ports: + # Do we really need to dole out characters one at a time here? + # Dunno, but this works well enough. + for c in probe_string: + ports[port].write(c) + time.sleep(0.1) + +time.sleep(1) + +for port in ports: + s = "" + while True: + c = ports[port].read(1) + if len(c) > 0: + s += c + else: + break + if args.verbose: + print "Received from {}: {!r} ({})".format(port, s, ":".join("{:02x}".format(ord(c)) for c in s)) + if looks_like_console(s): + print "{} looks like the Cryptech HSM console port".format(port) + if looks_like_rpc(s): + print "{} looks like the Cryptech HSM RPC port".format(port) diff --git a/projects/hsm/cryptech_upload b/projects/hsm/cryptech_upload index 722e37b..66fbe7d 100755 --- a/projects/hsm/cryptech_upload +++ b/projects/hsm/cryptech_upload @@ -1,4 +1,4 @@ -#!/usr/bin/python +#!/usr/bin/env python # # Copyright (c) 2016, NORDUnet A/S All rights reserved. # @@ -27,9 +27,11 @@ # 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 upload new a firmware image or FPGA bitstream """ + import os import sys import time |