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Security: SecureSession

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Make security sessions(secio, noise) share the same implementation
`BaseSession` to avoid duplicate implementation of buffered read.
This commit is contained in:
mhchia
2020-02-17 23:33:45 +08:00
parent 2df47a943c
commit 3c2e835725
8 changed files with 150 additions and 196 deletions
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17
libp2p/security/noise/io.py
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@ -1,14 +1,11 @@
from abc import ABC, abstractmethod
from typing import cast
from noise.connection import NoiseConnection as NoiseState
from libp2p.io.abc import ReadWriteCloser, MsgReadWriter, EncryptedMsgReadWriter
from libp2p.io.abc import EncryptedMsgReadWriter, MsgReadWriteCloser, ReadWriteCloser
from libp2p.io.msgio import BaseMsgReadWriter, encode_msg_with_length
from libp2p.io.utils import read_exactly
from libp2p.network.connection.raw_connection_interface import IRawConnection
SIZE_NOISE_MESSAGE_LEN = 2
MAX_NOISE_MESSAGE_LEN = 2 ** (8 * SIZE_NOISE_MESSAGE_LEN) - 1
SIZE_NOISE_MESSAGE_BODY_LEN = 2
@ -50,7 +47,14 @@ def decode_msg_body(noise_msg: bytes) -> bytes:
class BaseNoiseMsgReadWriter(EncryptedMsgReadWriter):
read_writer: MsgReadWriter
"""
The base implementation of noise message reader/writer.
`encrypt` and `decrypt` are not implemented here, which should be
implemented by the subclasses.
"""
read_writer: MsgReadWriteCloser
noise_state: NoiseState
def __init__(self, conn: IRawConnection, noise_state: NoiseState) -> None:
@ -67,6 +71,9 @@ class BaseNoiseMsgReadWriter(EncryptedMsgReadWriter):
noise_msg = self.decrypt(noise_msg_encrypted)
return decode_msg_body(noise_msg)
async def close(self) -> None:
await self.read_writer.close()
class NoiseHandshakeReadWriter(BaseNoiseMsgReadWriter):
def encrypt(self, data: bytes) -> bytes: