64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
# Copyright (c) 2015, 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 socket
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import ssl
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def wrap_socket(sock, ssl_context, host):
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if not hasattr(ssl, 'create_default_context'):
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# Python 2.7.0 - 2.7.8 do not have the concept of ssl contexts.
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# Thus we have to use the less flexible and legacy way of wrapping the
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# socket
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if ssl_context is not None:
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raise RuntimeError(
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"Cannot precisely configure the SSL connection, upgrade to "
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"Python >= 2.7.9 to fine tune the settings."
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)
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return ssl.wrap_socket(sock)
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if ssl_context is None:
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ssl_context = ssl.create_default_context()
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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__(self, host, port, ssl_context, timeout):
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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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def open(self, host, port):
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self.host = host
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self.port = port
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sock = socket.create_connection((host, port), self._timeout.connect)
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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):
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return self.file.read(size)
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def readline(self):
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return self.file.readline()
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def send(self, data):
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self.sock.sendall(data)
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def shutdown(self):
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imaplib.IMAP4.shutdown(self)
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