69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
from __future__ import print_function
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import os, sys, json
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from nacl.secret import SecretBox
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from wormhole.blocking.transcribe import Initiator, WrongPasswordError
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from wormhole.blocking.transit import TransitSender
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APPID = "lothar.com/wormhole/file-xfer"
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# we're sending
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filename = sys.argv[1]
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assert os.path.isfile(filename)
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transit_sender = TransitSender()
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filesize = os.stat(filename).st_size
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data = json.dumps({
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"file": {
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"filename": os.path.basename(filename),
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"filesize": filesize,
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},
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"transit": {
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"direct_connection_hints": transit_sender.get_direct_hints(),
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"relay_connection_hints": transit_sender.get_relay_hints(),
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},
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}).encode("utf-8")
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i = Initiator(APPID, data)
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code = i.get_code()
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print("On the other computer, please run: receive_file")
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print("Wormhole code is '%s'" % code)
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print("")
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try:
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them_bytes = i.get_data()
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except WrongPasswordError as e:
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print("ERROR: " + e.explain(), file=sys.stderr)
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sys.exit(1)
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them_d = json.loads(them_bytes.decode("utf-8"))
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#print("them: %r" % (them_d,))
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xfer_key = i.derive_key(APPID+"/xfer-key", SecretBox.KEY_SIZE)
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box = SecretBox(xfer_key)
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with open(filename, "rb") as f:
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plaintext = f.read()
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nonce = os.urandom(SecretBox.NONCE_SIZE)
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encrypted = box.encrypt(plaintext, nonce)
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tdata = them_d["transit"]
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transit_key = i.derive_key(APPID+"/transit-key")
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transit_sender.set_transit_key(transit_key)
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transit_sender.add_their_direct_hints(tdata["direct_connection_hints"])
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transit_sender.add_their_relay_hints(tdata["relay_connection_hints"])
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skt = transit_sender.establish_connection()
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print("Sending %d bytes.." % filesize)
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sent = 0
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while sent < len(encrypted):
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more = skt.send(encrypted[sent:])
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sent += more
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print("File sent.. waiting for confirmation")
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# ack is a short newline-terminated string, followed by socket close. A long
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# read is probably good enough.
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ack = skt.recv(300)
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if ack == "ok\n":
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print("Confirmation received. Transfer complete.")
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sys.exit(0)
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else:
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print("Transfer failed (remote says: %r)" % ack)
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sys.exit(1)
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