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lightning: use EC_KEY because it has better sign interface, add convenience method for 32-byte pubkey

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This commit is contained in:
Janus 2018-03-14 14:41:44 +01:00
parent f434617084
commit eaf51d59c3
1 changed files with 14 additions and 11 deletions
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25
lib/lightning.py
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@ -10,7 +10,7 @@ from google.protobuf import json_format
import binascii
import ecdsa.util
import hashlib
from ecdsa import SigningKey
from .bitcoin import EC_KEY, MySigningKey
from ecdsa.curves import SECP256k1
from . import bitcoin
from . import transaction
@ -265,8 +265,8 @@ def SignMessage(json):
print("searching lightning_extra_keys", req.pubKey)
for i in priv_keys:
assert type(i) is int
signkey = SigningKey.from_secret_exponent(i, curve=SECP256k1)
pubkeystr = signkey.get_verifying_key().to_string()
signkey = EC_KEY(i.to_bytes(32, "big"))
pubkeystr = pubkFromECKEY(signkey)
print("pubkeystr", pubkeystr)
if pubkeystr == req.pubKey:
pri = signkey
@ -275,7 +275,7 @@ def SignMessage(json):
else:
pri, _ = WALLET.export_private_key(address, None)
typ, pri, compressed = bitcoin.deserialize_privkey(pri)
pri = SigningKey.from_string(pri, curve=SECP256k1)
pri = EC_KEY(pri)
m.signature = pri.sign(bitcoin.Hash(req.messageToBeSigned), ecdsa.util.sigencode_der)
m.error = ""
@ -333,7 +333,7 @@ def tweakPrivKey(basePriv, commitTweak):
tweakInt = int.from_bytes(commitTweak, byteorder="big")
tweakInt += basePriv.secret # D is secret
tweakInt %= SECP256k1.generator.order()
return SigningKey.from_string(tweakInt.to_bytes(32, 'big'), curve=SECP256k1)
return EC_KEY(tweakInt.to_bytes(32, 'big'))
def singleTweakBytes(commitPoint, basePoint):
m = hashlib.sha256()
@ -356,14 +356,14 @@ def deriveRevocationPrivKey(revokeBasePriv, commitSecret):
revocationPriv = revokeHalfPriv + commitHalfPriv
revocationPriv %= SECP256k1.generator.order()
return SigningKey.from_string(revocationPriv.to_bytes(32, byteorder="big"), curve=SECP256k1)
return EC_KEY(revocationPriv.to_bytes(32, byteorder="big"))
def maybeTweakPrivKey(signdesc, pri):
if len(signdesc.singleTweak) > 0:
pri2 = tweakPrivKey(pri, signdesc.singleTweak)
elif len(signdesc.doubleTweak) > 0:
pri2 = deriveRevocationPrivKey(pri, SigningKey.from_string(signdesc.doubleTweak, curve=SECP256k1))
pri2 = deriveRevocationPrivKey(pri, EC_KEY(signdesc.doubleTweak))
else:
pri2 = pri
@ -594,7 +594,7 @@ def fetchPrivKey(str_address, keyLocatorFamily, keyLocatorIndex):
assert pri is not None, (str_address, keyLocatorFamily, keyLocatorIndex)
pri = SigningKey.from_string(pri, curve=SECP256k1)
pri = EC_KEY(pri)
return pri
@ -879,7 +879,7 @@ def DeriveNextKey(json):
#m.keyDescriptor.keyLocator.family =
#m.keyDescriptor.keyLocator.index =
m.keyDescriptor.pubKey = fetchPrivKey(None, 9000, globalIdx).privkey.get_verifying_key().to_string()
m.keyDescriptor.pubKey = pubkFromECKEY(fetchPrivKey(None, 9000, globalIdx))
globalIdx += 1
msg = json_format.MessageToJson(m)
@ -898,7 +898,7 @@ def DeriveKey(json):
m.keyDescriptor.keyLocator.family = family
m.keyDescriptor.keyLocator.index = index
m.keyDescriptor.pubKey = fetchPrivKey(None, family, index).privkey.get_verifying_key().to_string()
m.keyDescriptor.pubKey = pubkFromECKEY(fetchPrivKey(None, family, index))
msg = json_format.MessageToJson(m)
return msg
@ -925,7 +925,10 @@ def ScalarMult(json):
m = rpc_pb2.ScalarMultResponse()
m.pubKey = SigningKey.from_string(c.digest(), curve=SECP256k1).privkey.get_verifying_key().to_string()
m.pubKey = pubkFromECKEY(EC_KEY(c.digest()))
msg = json_format.MessageToJson(m)
return msg
def pubkFromECKEY(eckey):
return MySigningKey.from_secret_exponent(eckey.secret, curve=SECP256k1).get_verifying_key().to_string()