py-libp2p/libp2p/security/simple_security.py
2019-05-01 17:21:11 -04:00

62 lines
2.1 KiB
Python

import asyncio
from libp2p.security.secure_transport_interface import ISecureTransport
from libp2p.security.secure_conn_interface import ISecureConn
class SimpleSecurityTransport(ISecureTransport):
def __init__(self, key_phrase):
self.key_phrase = key_phrase
async def secure_inbound(self, conn):
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are not the initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
await conn.write(self.key_phrase.encode())
incoming = (await conn.read()).decode()
if incoming != self.key_phrase:
raise Exception("Key phrase differed between nodes. Expected " + self.key_phrase)
secure_conn = SimpleSecureConn(conn, self.key_phrase)
return secure_conn
async def secure_outbound(self, conn, peer_id):
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are the initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
await conn.write(self.key_phrase.encode())
incoming = (await conn.read()).decode()
# Force context switch, as this security transport is built for testing locally
# in a single event loop
await asyncio.sleep(0)
if incoming != self.key_phrase:
raise Exception("Key phrase differed between nodes. Expected " + self.key_phrase)
secure_conn = SimpleSecureConn(conn, self.key_phrase)
return secure_conn
class SimpleSecureConn(ISecureConn):
def __init__(self, conn, key_phrase):
self.conn = conn
self.details = {}
self.details["key_phrase"] = key_phrase
def get_conn(self):
"""
:return: connection object that has been made secure
"""
return self.conn
def get_security_details(self):
"""
:return: map containing details about the connections security
"""
return self.details