81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
import asyncio
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from libp2p.security.secure_transport_interface import ISecureTransport
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from libp2p.security.secure_conn_interface import ISecureConn
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from typing import TYPE_CHECKING, cast
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if TYPE_CHECKING:
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from libp2p.network.connection.raw_connection_interface import IRawConnection
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from libp2p.peer.id import ID
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from .typing import TSecurityDetails
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class SimpleSecurityTransport(ISecureTransport):
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key_phrase: str
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def __init__(self, key_phrase: str) -> None:
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self.key_phrase = key_phrase
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async def secure_inbound(self, conn: "IRawConnection") -> "ISecureConn":
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"""
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Secure the connection, either locally or by communicating with opposing node via conn,
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for an inbound connection (i.e. we are not the initiator)
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:return: secure connection object (that implements secure_conn_interface)
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"""
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await conn.write(self.key_phrase.encode())
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incoming = (await conn.read()).decode()
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if incoming != self.key_phrase:
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raise Exception(
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"Key phrase differed between nodes. Expected " + self.key_phrase
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)
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secure_conn = SimpleSecureConn(conn, self.key_phrase)
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return secure_conn
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async def secure_outbound(
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self, conn: "IRawConnection", peer_id: "ID"
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) -> "ISecureConn":
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"""
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Secure the connection, either locally or by communicating with opposing node via conn,
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for an inbound connection (i.e. we are the initiator)
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:return: secure connection object (that implements secure_conn_interface)
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"""
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await conn.write(self.key_phrase.encode())
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incoming = (await conn.read()).decode()
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# Force context switch, as this security transport is built for testing locally
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# in a single event loop
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await asyncio.sleep(0)
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if incoming != self.key_phrase:
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raise Exception(
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"Key phrase differed between nodes. Expected " + self.key_phrase
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)
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secure_conn = SimpleSecureConn(conn, self.key_phrase)
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return secure_conn
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class SimpleSecureConn(ISecureConn):
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conn: "IRawConnection"
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key_phrase: str
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details: "TSecurityDetails"
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def __init__(self, conn: "IRawConnection", key_phrase: str) -> None:
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self.conn = conn
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self.details = cast("TSecurityDetails", {})
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self.details["key_phrase"] = key_phrase
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def get_conn(self) -> "IRawConnection":
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"""
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:return: connection object that has been made secure
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"""
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return self.conn
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def get_security_details(self) -> "TSecurityDetails":
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"""
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:return: map containing details about the connections security
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"""
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return self.details
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