69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
# Copyright (c) 2023, Menno Smits
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# Released subject to the New BSD License
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# Please see http://en.wikipedia.org/wiki/BSD_licenses
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"""
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This module contains IMAPClient's functionality related to Transport
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Layer Security (TLS a.k.a. SSL).
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"""
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import imaplib
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import io
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import socket
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import ssl
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from typing import Optional, TYPE_CHECKING
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if TYPE_CHECKING:
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from typing_extensions import Buffer
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def wrap_socket(
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sock: socket.socket, ssl_context: Optional[ssl.SSLContext], host: str
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) -> socket.socket:
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if ssl_context is None:
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ssl_context = ssl.create_default_context(purpose=ssl.Purpose.SERVER_AUTH)
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return ssl_context.wrap_socket(sock, server_hostname=host)
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class IMAP4_TLS(imaplib.IMAP4):
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"""IMAP4 client class for TLS/SSL connections.
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Adapted from imaplib.IMAP4_SSL.
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"""
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def __init__(
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self,
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host: str,
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port: int,
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ssl_context: Optional[ssl.SSLContext],
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timeout: Optional[float] = None,
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):
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self.ssl_context = ssl_context
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self._timeout = timeout
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imaplib.IMAP4.__init__(self, host, port)
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self.file: io.BufferedReader
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def open(
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self, host: str = "", port: int = 993, timeout: Optional[float] = None
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) -> None:
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self.host = host
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self.port = port
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sock = socket.create_connection(
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(host, port), timeout if timeout is not None else self._timeout
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)
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self.sock = wrap_socket(sock, self.ssl_context, host)
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self.file = self.sock.makefile("rb")
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def read(self, size: int) -> bytes:
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return self.file.read(size)
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def readline(self) -> bytes:
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return self.file.readline()
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def send(self, data: "Buffer") -> None:
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self.sock.sendall(data)
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def shutdown(self) -> None:
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imaplib.IMAP4.shutdown(self)
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