tlslite.integration.smtp_tls

Package tlslite :: Package integration :: Module smtp_tls |
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# Source Code for Module tlslite.integration.smtp_tls

     1  # Author: Trevor Perrin
     2  # See the LICENSE file for legal information regarding use of this file.
     3
     4  """TLS Lite + smtplib."""
     5
     6  from smtplib import SMTP
     7  from tlslite.tlsconnection import TLSConnection
     8  from tlslite.integration.clienthelper import ClientHelper
     9
    10 -class SMTP_TLS(SMTP):
    11      """This class extends L{smtplib.SMTP} with TLS support."""
    12
    13 -    def starttls(self,
    14                   username=None, password=None,
    15                   certChain=None, privateKey=None,
    16                   checker=None,
    17                   settings=None):
    18          """Puts the connection to the SMTP server into TLS mode.
    19
    20          If the server supports TLS, this will encrypt the rest of the SMTP
    21          session.
    22
    23          For client authentication, use one of these argument
    24          combinations:
    25           - username, password (SRP)
    26           - certChain, privateKey (certificate)
    27
    28          For server authentication, you can either rely on the
    29          implicit mutual authentication performed by SRP or
    30          you can do certificate-based server
    31          authentication with one of these argument combinations:
    32           - x509Fingerprint
    33
    34          Certificate-based server authentication is compatible with
    35          SRP or certificate-based client authentication.
    36
    37          The caller should be prepared to handle TLS-specific
    38          exceptions.  See the client handshake functions in
    39          L{tlslite.TLSConnection.TLSConnection} for details on which
    40          exceptions might be raised.
    41
    42          @type username: str
    43          @param username: SRP username.  Requires the
    44          'password' argument.
    45
    46          @type password: str
    47          @param password: SRP password for mutual authentication.
    48          Requires the 'username' argument.
    49
    50          @type certChain: L{tlslite.x509certchain.X509CertChain}
    51          @param certChain: Certificate chain for client authentication.
    52          Requires the 'privateKey' argument.  Excludes the SRP arguments.
    53
    54          @type privateKey: L{tlslite.utils.rsakey.RSAKey}
    55          @param privateKey: Private key for client authentication.
    56          Requires the 'certChain' argument.  Excludes the SRP arguments.
    57
    58          @type checker: L{tlslite.checker.Checker}
    59          @param checker: Callable object called after handshaking to
    60          evaluate the connection and raise an Exception if necessary.
    61
    62          @type settings: L{tlslite.handshakesettings.HandshakeSettings}
    63          @param settings: Various settings which can be used to control
    64          the ciphersuites, certificate types, and SSL/TLS versions
    65          offered by the client.
    66          """
    67          (resp, reply) = self.docmd("STARTTLS")
    68          if resp == 220:
    69              helper = ClientHelper(
    70                       username, password,
    71                       certChain, privateKey,
    72                       checker,
    73                       settings)
    74              conn = TLSConnection(self.sock)
    75              helper._handshake(conn)
    76              self.sock = conn
    77              self.file = conn.makefile('rb')
    78          return (resp, reply)
    79