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Ursula now substantiates her stamp. This is the first half of #294.

pull/351/head
jMyles 2018-07-04 18:59:33 -07:00
parent a1ca7d43c1
commit d7c7e06a18
1 changed files with 20 additions and 3 deletions
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23
nucypher/characters.py
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@ -25,7 +25,8 @@ from nucypher.config.configs import CharacterConfiguration
from nucypher.crypto.api import keccak_digest, encrypt_and_sign
from nucypher.crypto.constants import PUBLIC_ADDRESS_LENGTH, PUBLIC_KEY_LENGTH
from nucypher.crypto.kits import UmbralMessageKit
from nucypher.crypto.powers import CryptoPower, SigningPower, EncryptingPower, DelegatingPower, NoSigningPower
from nucypher.crypto.powers import CryptoPower, SigningPower, EncryptingPower, DelegatingPower, NoSigningPower, \
BlockchainPower
from nucypher.crypto.signing import signature_splitter, StrangerStamp
from nucypher.network.middleware import RestMiddleware
from nucypher.network.protocols import InterfaceInfo
@ -871,6 +872,7 @@ class Bob(Character):
class Ursula(Character, ProxyRESTServer, Miner):
_internal_splitter = BytestringSplitter(Signature,
VariableLengthBytestring,
(UmbralPublicKey, PUBLIC_KEY_LENGTH),
(UmbralPublicKey, PUBLIC_KEY_LENGTH),
int(PUBLIC_ADDRESS_LENGTH),
@ -902,6 +904,8 @@ class Ursula(Character, ProxyRESTServer, Miner):
always_be_learning=None,
crypto_power=None
):
self.evidence_of_decentralized_identity = constants.NOT_SIGNED
if dht_host:
self.dht_interface = InterfaceInfo(host=dht_host, port=dht_port)
else:
@ -917,12 +921,16 @@ class Ursula(Character, ProxyRESTServer, Miner):
if not federated_only:
Miner.__init__(self, miner_agent=miner_agent, is_me=is_me, checksum_address=checksum_address)
blockchain_power = BlockchainPower(blockchain=self.blockchain, account=self.checksum_public_address)
self._crypto_power.consume_power_up(blockchain_power)
ProxyRESTServer.__init__(self, host=rest_host, port=rest_port, db_name=db_name)
if is_me is True:
# TODO: 340
self._stored_treasure_maps = {}
self.attach_dht_server()
if not federated_only:
self.substantiate_stamp()
self.__interface_signature = interface_signature
@property
@ -1030,7 +1038,7 @@ class Ursula(Character, ProxyRESTServer, Miner):
@classmethod
def from_bytes(cls, ursula_as_bytes, federated_only=False):
# TODO: Include encrypting key?
signature, verifying_key, encrypting_key, public_address, rest_info, dht_info = cls._internal_splitter(
signature, identity_evidence, verifying_key, encrypting_key, public_address, rest_info, dht_info = cls._internal_splitter(
ursula_as_bytes)
stranger_ursula_from_public_keys = cls.from_public_keys(
{SigningPower: verifying_key, EncryptingPower: encrypting_key},
@ -1051,7 +1059,7 @@ class Ursula(Character, ProxyRESTServer, Miner):
stranger_ursulas = []
ursulas_attrs = cls._internal_splitter.repeat(ursulas_as_bytes)
for (signature, verifying_key, encrypting_key, public_address, rest_info, dht_info) in ursulas_attrs:
for (signature, identity_evidence, verifying_key, encrypting_key, public_address, rest_info, dht_info) in ursulas_attrs:
stranger_ursula_from_public_keys = cls.from_public_keys(
{SigningPower: verifying_key, EncryptingPower: encrypting_key},
interface_signature=signature,
@ -1072,6 +1080,12 @@ class Ursula(Character, ProxyRESTServer, Miner):
self.verified = interface_is_valid
return interface_is_valid
def substantiate_stamp(self):
blockchain_power = self._crypto_power.power_ups(BlockchainPower)
blockchain_power.unlock_account('this-is-not-a-secure-password') # TODO: 349
signature = blockchain_power.sign_message(bytes(self.stamp))
self.evidence_of_decentralized_identity = signature
def __bytes__(self):
message = self.canonical_public_address + self.rest_interface
interface_info = VariableLengthBytestring(self.rest_interface)
@ -1080,7 +1094,10 @@ class Ursula(Character, ProxyRESTServer, Miner):
message += self.dht_interface
interface_info += VariableLengthBytestring(self.dht_interface)
identity_evidence = VariableLengthBytestring(self.evidence_of_decentralized_identity)
as_bytes = bytes().join((bytes(self._interface_signature),
bytes(identity_evidence),
bytes(self.public_key(SigningPower)),
bytes(self.public_key(EncryptingPower)),
self.canonical_public_address,