80 lines
3 KiB
Python
80 lines
3 KiB
Python
# Author: Trevor Perrin
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# See the LICENSE file for legal information regarding use of this file.
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"""TLS Lite + smtplib."""
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from smtplib import SMTP
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from tlslite.tlsconnection import TLSConnection
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from tlslite.integration.clienthelper import ClientHelper
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class SMTP_TLS(SMTP):
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"""This class extends :py:class:`smtplib.SMTP` with TLS support."""
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def starttls(self,
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username=None, password=None,
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certChain=None, privateKey=None,
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checker=None,
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settings=None):
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"""Puts the connection to the SMTP server into TLS mode.
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If the server supports TLS, this will encrypt the rest of the SMTP
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session.
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For client authentication, use one of these argument
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combinations:
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- username, password (SRP)
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- certChain, privateKey (certificate)
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For server authentication, you can either rely on the
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implicit mutual authentication performed by SRP or
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you can do certificate-based server
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authentication with one of these argument combinations:
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- x509Fingerprint
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Certificate-based server authentication is compatible with
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SRP or certificate-based client authentication.
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The caller should be prepared to handle TLS-specific
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exceptions. See the client handshake functions in
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:py:class:`~tlslite.tlsconnection.TLSConnection` for details on which
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exceptions might be raised.
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:type username: str
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:param username: SRP username. Requires the
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'password' argument.
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:type password: str
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:param password: SRP password for mutual authentication.
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Requires the 'username' argument.
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:type certChain: ~tlslite.x509certchain.X509CertChain
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:param certChain: Certificate chain for client authentication.
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Requires the 'privateKey' argument. Excludes the SRP arguments.
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:type privateKey: ~tlslite.utils.rsakey.RSAKey
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:param privateKey: Private key for client authentication.
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Requires the 'certChain' argument. Excludes the SRP arguments.
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:type checker: ~tlslite.checker.Checker
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:param checker: Callable object called after handshaking to
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evaluate the connection and raise an Exception if necessary.
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:type settings: ~tlslite.handshakesettings.HandshakeSettings
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:param settings: Various settings which can be used to control
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the ciphersuites, certificate types, and SSL/TLS versions
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offered by the client.
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"""
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(resp, reply) = self.docmd("STARTTLS")
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if resp == 220:
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helper = ClientHelper(
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username, password,
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certChain, privateKey,
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checker,
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settings)
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conn = TLSConnection(self.sock)
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helper._handshake(conn)
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self.sock = conn
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self.file = conn.makefile('rb')
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return (resp, reply)
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