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lightning: attempt implementing SecretKeyRing

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This commit is contained in:
Janus 2018-03-09 21:30:43 +01:00
parent 13cf439dd2
commit e718fb0834
1 changed files with 32 additions and 16 deletions
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48
lib/lightning.py
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@ -842,22 +842,31 @@ async def readReqAndReply(obj, writer):
writer.write(json.dumps({"id":obj["id"],"result": result}).encode("ascii") + b"\n")
await writer.drain()
def derivePrivKey(keyDesc):
keyDescFam = keyDesc.keyLocator.family
keyDescIdx = keyDesc.keyLocator.index
keyDescPubKey = keyDesc.pubKey
adr = None
if len(keyDescPubKey) != 0:
adr = bitcoin.pubkey_to_address('p2wpkh', binascii.hexlify(
keyDescPubKey).decode("utf-8"))
return fetchPrivKey(adr, keyDescFam, keyDescIdx)
def DerivePrivKey(json):
req = rpc_pb2.DerivePrivKeyRequest()
json_format.Parse(json, req)
family = json.keyDescriptor.keyLocator.family
idx = json.keyDescriptor.keyLocator.index
pubKey = json.keyDescriptor.pubKey
m = rpc_pb2.DerivePrivKeyResponse()
#m.privKey =
m.privKey = derivePrivKey(json.keyDescriptor).privkey.secret_multiplier
msg = json_format.MessageToJson(m)
return msg
globalIdx = 0
def DeriveNextKey(json):
global globalIdx
req = rpc_pb2.DeriveNextKeyRequest()
json_format.Parse(json, req)
@ -865,9 +874,13 @@ def DeriveNextKey(json):
m = rpc_pb2.DeriveNextKeyResponse()
# lnd leaves these unset:
# source: https://github.com/lightningnetwork/lnd/pull/769/files#diff-c954f5135a8995b1a3dfa298101dd0efR160
#m.keyDescriptor.keyLocator.family =
#m.keyDescriptor.keyLocator.index =
#m.keyDescriptor.pubKey =
m.keyDescriptor.pubKey = fetchPrivKey(None, 9000, globalIdx)
globalIdx += 1
msg = json_format.MessageToJson(m)
return msg
@ -881,9 +894,11 @@ def DeriveKey(json):
m = rpc_pb2.DeriveKeyResponse()
#m.keyDescriptor.keyLocator.family =
#m.keyDescriptor.keyLocator.index =
#m.keyDescriptor.pubKey =
#lnd sets these to parameter values
m.keyDescriptor.keyLocator.family = family
m.keyDescriptor.keyLocator.index = index
m.keyDescriptor.pubKey = fetchPrivKey(None, family, index).get_verifying_key().to_string()
msg = json_format.MessageToJson(m)
return msg
@ -899,17 +914,18 @@ def ScalarMult(json):
req = rpc_pb2.ScalarMultRequest()
json_format.Parse(json, req)
keyDescFam = json.keyDescriptor.keyLocator.family
keyDescIdx = json.keyDescriptor.keyLocator.index
keyDescPubKey = json.keyDescriptor.pubKey
privKey = derivePrivKey(json.keyDescriptor)
pubKey = json.pubKey
point = bitcoin.ser_to_point(json.pubKey)
point = point * int.from_bytes(privKey.secret_multiplier, "big")
c = hashlib.sha256()
c.update(bitcoin.point_to_ser(point, True))
m = rpc_pb2.ScalarMultResponse()
#m.pubKey = b""
m.pubKey = c.digest()
msg = json_format.MessageToJson(m)
return msg
assert False, "SecretKeyRing not implemented"