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Ursula checks that Bob's version of Alice ETH address is consistent to her own account

pull/507/head
David Núñez 2019-02-12 19:56:20 +01:00 committed by szotov
parent 57c242e813
commit 06ff6a2d8e
1 changed files with 17 additions and 4 deletions
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21
nucypher/network/server.py
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@ -37,14 +37,14 @@ from nucypher.config.storages import ForgetfulNodeStorage
from nucypher.crypto.api import keccak_digest from nucypher.crypto.api import keccak_digest
from nucypher.crypto.kits import UmbralMessageKit from nucypher.crypto.kits import UmbralMessageKit
from nucypher.crypto.powers import SigningPower, KeyPairBasedPower, PowerUpError from nucypher.crypto.powers import SigningPower, KeyPairBasedPower, PowerUpError
from nucypher.crypto.signing import InvalidSignature from nucypher.crypto.signing import InvalidSignature, SignatureStamp, Signature
from nucypher.crypto.signing import SignatureStamp from nucypher.crypto.utils import canonical_address_from_umbral_key
from nucypher.keystore.keypairs import HostingKeypair from nucypher.keystore.keypairs import HostingKeypair
from nucypher.keystore.keystore import NotFound from nucypher.keystore.keystore import NotFound
from nucypher.keystore.threading import ThreadedSession from nucypher.keystore.threading import ThreadedSession
from nucypher.network import LEARNING_LOOP_VERSION from nucypher.network import LEARNING_LOOP_VERSION
from nucypher.network.middleware import RestMiddleware from nucypher.network.middleware import RestMiddleware
from nucypher.network.protocols import InterfaceInfo from nucypher.network.protocols import InterfaceInfo, SuspiciousActivity
HERE = BASE_DIR = os.path.abspath(os.path.dirname(__file__)) HERE = BASE_DIR = os.path.abspath(os.path.dirname(__file__))
TEMPLATES_DIR = os.path.join(HERE, "templates") TEMPLATES_DIR = os.path.join(HERE, "templates")
@ -315,7 +315,20 @@ def make_rest_app(
alices_verifying_key = UmbralPublicKey.from_bytes(verifying_key_bytes) alices_verifying_key = UmbralPublicKey.from_bytes(verifying_key_bytes)
cfrag_byte_stream = b"" cfrag_byte_stream = b""
# This is Alice's verifying key as ETH address, signed by Bob alices_address = canonical_address_from_umbral_key(alices_verifying_key)
if not alices_address == work_order.alice_address:
message = f"This Bob ({work_order.bob}) sent an Alice's ETH address " \
f"({work_order.alice_address}) that doesn't match " \
f"the one I have ({alices_address})."
raise SuspiciousActivity(message)
bob_pubkey = work_order.bob.stamp.as_umbral_pubkey()
if not work_order.alice_address_signature.verify(message=alices_address,
verifying_key=bob_pubkey):
message = f"This Bob ({work_order.bob}) sent an invalid signature of Alice's ETH address"
raise InvalidSignature(message)
# This is Bob's signature of Alice's verifying key as ETH address.
alice_address_signature = bytes(work_order.alice_address_signature) alice_address_signature = bytes(work_order.alice_address_signature)
for capsule, capsule_signature in zip(work_order.capsules, work_order.capsule_signatures): for capsule, capsule_signature in zip(work_order.capsules, work_order.capsule_signatures):