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stream signing for tx with large number of inputs

master
djb 10 years ago
parent
95e0e23869
commit
ab8c51e233
No known key found for this signature in database
GPG Key ID: 75D4B1A518B37477
1 changed files with 51 additions and 29 deletions
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  1. 80
      plugins/digitalbitbox/digitalbitbox.py

80
plugins/digitalbitbox/digitalbitbox.py
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@ -14,6 +14,7 @@ try:
import time
import hid
import json
import math
import hashlib
from ecdsa.ecdsa import generator_secp256k1
from ecdsa.util import sigencode_der
@ -212,8 +213,8 @@ class DigitalBitbox_Client():
def dbb_erase(self):
self.handler.show_message(_("Are you sure you want to erase the Digital Bitbox?\r\n\r\n" \
"To continue, touch the Digital Bitbox's blinking light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the blinking light or wait for the timeout."))
"To continue, touch the Digital Bitbox's light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the light or wait for the timeout."))
hid_reply = self.hid_send_encrypt('{"reset":"__ERASE__"}')
self.handler.clear_dialog()
if 'error' in hid_reply:
@ -237,8 +238,8 @@ class DigitalBitbox_Client():
key = self.stretch_key(key)
if show_msg:
self.handler.show_message(_("Loading backup...\r\n\r\n" \
"To continue, touch the Digital Bitbox's blinking light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the blinking light or wait for the timeout."))
"To continue, touch the Digital Bitbox's light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the light or wait for the timeout."))
msg = '{"seed":{"source": "backup", "key": "%s", "filename": "%s"}}' % (key, backups['backup'][f])
hid_reply = self.hid_send_encrypt(msg)
self.handler.clear_dialog()
@ -291,6 +292,7 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
def __init__(self, d):
Hardware_KeyStore.__init__(self, d)
self.force_watching_only = False
self.maxInputs = 14 # maximum inputs per single sign command
def get_derivation(self):
@ -398,33 +400,53 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
changePubkey = self.derive_pubkey(index[0], index[1])
pubkeyarray_i = {'pubkey': changePubkey, 'keypath': changePath}
pubkeyarray.append(pubkeyarray_i)
# Build sign command
msg = '{"sign": {"meta":"%s", "data":%s, "checkpub":%s} }' % \
(Hash(tx.serialize()).encode('hex'), json.dumps(hasharray), json.dumps(pubkeyarray))
dbb_client = self.plugin.get_client(self)
if not dbb_client.is_paired():
raise Exception("Could not sign transaction.")
reply = dbb_client.hid_send_encrypt(msg)
self.handler.show_message(_("Signing transaction ...\r\n\r\n" \
"To continue, touch the Digital Bitbox's blinking light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the blinking light or wait for the timeout."))
reply = dbb_client.hid_send_encrypt(msg) # Send twice, first returns an echo for smart verification (not implemented)
self.handler.clear_dialog()
if 'error' in reply:
raise Exception(reply['error']['message'])
if 'sign' not in reply:
raise Exception("Could not sign transaction.")
# Build sign command
dbb_signatures = []
steps = math.ceil(1.0 * len(hasharray) / self.maxInputs)
for step in range(int(steps)):
hashes = hasharray[step * self.maxInputs : (step + 1) * self.maxInputs]
msg = '{"sign": {"meta":"%s", "data":%s, "checkpub":%s} }' % \
(Hash(tx.serialize()).encode('hex'), json.dumps(hashes), json.dumps(pubkeyarray))
dbb_client = self.plugin.get_client(self)
if not dbb_client.is_paired():
raise Exception("Could not sign transaction.")
reply = dbb_client.hid_send_encrypt(msg)
if 'error' in reply:
raise Exception(reply['error']['message'])
if 'echo' not in reply:
raise Exception("Could not sign transaction.")
if steps > 1:
self.handler.show_message(_("Signing large transaction. Please be patient ...\r\n\r\n" \
"To continue, touch the Digital Bitbox's blinking light for 3 seconds. " \
"(Touch " + str(step + 1) + " of " + str(int(steps)) + ")\r\n\r\n" \
"To cancel, briefly touch the blinking light or wait for the timeout.\r\n\r\n"))
else:
self.handler.show_message(_("Signing transaction ...\r\n\r\n" \
"To continue, touch the Digital Bitbox's blinking light for 3 seconds.\r\n\r\n" \
"To cancel, briefly touch the blinking light or wait for the timeout."))
reply = dbb_client.hid_send_encrypt(msg) # Send twice, first returns an echo for smart verification (not implemented)
self.handler.clear_dialog()
if 'error' in reply:
raise Exception(reply['error']['message'])
if 'sign' not in reply:
raise Exception("Could not sign transaction.")
dbb_signatures.extend(reply['sign'])
if len(reply['sign']) <> len(tx.inputs()):
raise Exception("Incorrect number of transactions signed.") # Should never occur
# Fill signatures
if len(dbb_signatures) <> len(tx.inputs()):
raise Exception("Incorrect number of transactions signed.") # Should never occur
for i, txin in enumerate(tx.inputs()):
num = txin['num_sig']
for pubkey in txin['pubkeys']:
@ -432,7 +454,7 @@ class DigitalBitbox_KeyStore(Hardware_KeyStore):
if len(signatures) == num:
break # txin is complete
ii = txin['pubkeys'].index(pubkey)
signed = reply['sign'][i]
signed = dbb_signatures[i]
if signed['pubkey'] != pubkey:
continue
sig_r = int(signed['sig'][:64], 16)

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